update dependencies

flake output hashes
up cargo dependencies
2024-12-20 12:17:01 +08:00 · 2024-12-20 12:17:01 +08:00 · 2024-12-20 12:17:01 +08:00 · 2024-12-20 12:17:01 +08:00 · 2024-12-20 12:17:01 +08:00 · 2024-12-20 12:17:01 +08:00
117 changed files with 10896 additions and 19335 deletions
--- a/.cargo/config
+++ b/.cargo/config
@ -1,5 +1,4 @@
 [target.armv7-none-eabihf]
 runner = "./runner.sh"
 rustflags = [
  "-C", "link-arg=-Tlink.x",
  "-C", "target-feature=a9,armv7-a,neon",
--- a/.gitignore
+++ b/.gitignore
@ -1 +1,2 @@
 /target
 result*
--- a/Cargo.lock
+++ b/Cargo.lock
@ -1,183 +1,240 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 version = 3
 [[package]]
 name = "bit_field"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dcb6dd1c2376d2e096796e234a70e17e94cc2d5d54ff8ce42b28cef1d0d359a4"
 [[package]]
 name = "bitflags"
-version = "1.2.1"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 [[package]]
 name = "byteorder"
-version = "1.3.4"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "60f0b0d4c0a382d2734228fd12b5a6b5dac185c60e938026fd31b265b94f9bd2"
 [[package]]
 name = "cc"
 version = "1.0.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
 [[package]]
 name = "cfg-if"
-version = "0.1.10"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 [[package]]
 name = "compiler_builtins"
-version = "0.1.27"
+version = "0.1.49"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "20b1438ef42c655665a8ab2c1c6d605a305f031d38d9be689ddfef41a20f3aa2"
 [[package]]
 name = "core_io"
 version = "0.1.0"
 source = "git+https://git.m-labs.hk/M-Labs/rs-core_io.git?rev=e9d3edf027#e9d3edf0272502b0dd6c26e8a4869c2912657615"
 [[package]]
 name = "embedded-hal"
-version = "0.2.3"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35949884794ad573cf46071e41c9b60efb0cb311e3ca01f7af807af1debc66ff"
 dependencies = [
- "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.3",
- "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void",
 ]
 [[package]]
 name = "experiments"
 version = "0.0.0"
 dependencies = [
- "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal",
- "libasync 0.0.0",
+ "libasync",
- "libboard_zynq 0.0.0",
+ "libboard_zynq",
- "libcortex_a9 0.0.0",
+ "libcortex_a9",
- "libregister 0.0.0",
+ "libregister",
- "libsupport_zynq 0.0.0",
+ "libsupport_zynq",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log",
 ]
 [[package]]
 name = "fatfs"
 version = "0.3.6"
 source = "git+https://git.m-labs.hk/M-Labs/rust-fatfs.git?rev=4b5e420084#4b5e420084fd1c4a9c105680b687523909b6469c"
 dependencies = [
 "bitflags",
 "byteorder",
 "core_io",
 "log",
 ]
 [[package]]
 name = "libasync"
 version = "0.0.0"
 dependencies = [
- "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal",
- "libcortex_a9 0.0.0",
+ "libcortex_a9",
- "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 1.0.0",
- "pin-utils 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-utils",
- "smoltcp 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smoltcp",
 ]
 [[package]]
 name = "libboard_zynq"
 version = "0.0.0"
 dependencies = [
- "bit_field 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bit_field",
- "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal",
- "libcortex_a9 0.0.0",
+ "libasync",
- "libregister 0.0.0",
+ "libcortex_a9",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libregister",
- "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log",
- "smoltcp 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.3",
- "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smoltcp",
- "volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void",
 "volatile-register",
 ]
 [[package]]
 name = "libconfig"
 version = "0.1.0"
 dependencies = [
 "core_io",
 "fatfs",
 "libboard_zynq",
 "log",
 ]
 [[package]]
 name = "libcortex_a9"
 version = "0.0.0"
 dependencies = [
- "bit_field 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bit_field",
- "libregister 0.0.0",
+ "libregister",
- "volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "volatile-register",
 ]
 [[package]]
 name = "libregister"
 version = "0.0.0"
 dependencies = [
- "bit_field 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bit_field",
- "vcell 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell",
- "volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "volatile-register",
 ]
 [[package]]
 name = "libsupport_zynq"
 version = "0.0.0"
 dependencies = [
- "compiler_builtins 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc",
- "libboard_zynq 0.0.0",
+ "compiler_builtins",
- "libcortex_a9 0.0.0",
+ "libboard_zynq",
- "libregister 0.0.0",
+ "libcortex_a9",
- "linked_list_allocator 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libregister",
- "r0 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "linked_list_allocator",
 "r0",
 ]
 [[package]]
 name = "linked_list_allocator"
-version = "0.8.3"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "822add9edb1860698b79522510da17bef885171f75aa395cff099d770c609c24"
 [[package]]
 name = "log"
-version = "0.4.8"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
 dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if",
 ]
 [[package]]
 name = "managed"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c75de51135344a4f8ed3cfe2720dc27736f7711989703a0b43aadf3753c55577"
 [[package]]
 name = "nb"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "801d31da0513b6ec5214e9bf433a77966320625a37860f910be265be6e18d06f"
 dependencies = [
 "nb 1.0.0",
 ]
 [[package]]
 name = "nb"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
 [[package]]
 name = "pin-utils"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 [[package]]
 name = "r0"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bd7a31eed1591dcbc95d92ad7161908e72f4677f8fabf2a32ca49b4237cbf211"
 [[package]]
 name = "smoltcp"
-version = "0.6.0"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e4a069bef843d170df47e7c0a8bf8d037f217d9f5b325865acc3e466ffe40d3"
 dependencies = [
- "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags",
- "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
- "managed 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "managed",
 ]
 [[package]]
 name = "szl"
 version = "0.1.0"
 dependencies = [
 "byteorder",
 "core_io",
 "libboard_zynq",
 "libconfig",
 "libcortex_a9",
 "libregister",
 "libsupport_zynq",
 "log",
 ]
 [[package]]
 name = "vcell"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
 [[package]]
 name = "void"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 [[package]]
 name = "volatile-register"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ee8f19f9d74293faf70901bc20ad067dc1ad390d2cbf1e3f75f721ffee908b6"
 dependencies = [
- "vcell 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell",
 ]
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 "checksum compiler_builtins 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)" = "38f18416546abfbf8d801c555a0e99524453e7214f9cc9107ad49de3d5948ccc"
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 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d67cb4616d99b940db1d6bd28844ff97108b498a6ca850e5b6191a532063286"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,19 +1,20 @@
 [workspace]
 members = [
-  "libregister", "libcortex_a9",
+  "libregister",
-  "libboard_zynq", "libsupport_zynq",
+  "libcortex_a9",
  "libboard_zynq",
  "libsupport_zynq",
  "libasync",
  "libconfig",
  "experiments",
  "szl",
 ]
 [profile.dev]
 panic = "abort"
 lto = false
 [profile.release]
 panic = "abort"
 debug = true
-# Link-Time Optimization:
+codegen-units = 1
-# turn off if you get unusable debug symbols.
+opt-level = 's'
 lto = true
-opt-level = 'z'  # Optimize for size.
+debug-assertions = false
 overflow-checks = false
--- a/165
+++ b/165
@ -0,0 +1,165 @@
                   GNU LESSER GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
  This version of the GNU Lesser General Public License incorporates
 the terms and conditions of version 3 of the GNU General Public
 License, supplemented by the additional permissions listed below.
  0. Additional Definitions.
  As used herein, "this License" refers to version 3 of the GNU Lesser
 General Public License, and the "GNU GPL" refers to version 3 of the GNU
 General Public License.
  "The Library" refers to a covered work governed by this License,
 other than an Application or a Combined Work as defined below.
  An "Application" is any work that makes use of an interface provided
 by the Library, but which is not otherwise based on the Library.
 Defining a subclass of a class defined by the Library is deemed a mode
 of using an interface provided by the Library.
  A "Combined Work" is a work produced by combining or linking an
 Application with the Library.  The particular version of the Library
 with which the Combined Work was made is also called the "Linked
 Version".
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 Corresponding Source for the Combined Work, excluding any source code
 for portions of the Combined Work that, considered in isolation, are
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 object code and/or source code for the Application, including any data
 and utility programs needed for reproducing the Combined Work from the
 Application, but excluding the System Libraries of the Combined Work.
  1. Exception to Section 3 of the GNU GPL.
  You may convey a covered work under sections 3 and 4 of this License
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  If the Library as you received it specifies that a proxy can decide
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 Library.
--- a/README.md
+++ b/README.md
@ -1,47 +1,49 @@
-# Build
+# Bare-metal Rust on Zynq-7000
 Supported features:
 * Clocking setup
 * UART
 * SDRAM setup
 * Ethernet with smoltcp and async-await on TCP sockets
 * SD card
 * PL programming and startup
 * Pure Rust SZL first-stage bootloader, with SD boot and netboot
 * Control of second CPU core and message passing, with async-await support
 Supported boards:
 * Kasli-SoC
 * ZC706
 * Red Pitaya
 * Cora Z7-10 (seems to also run on Cora Z7-07S, including dual-core support)
 ## Build
 Zynq-rs is packaged using the [Nix](https://nixos.org) Flakes system. Install Nix 2.4+ and enable flakes by adding ``experimental-features = nix-command flakes`` to ``nix.conf`` (e.g. ``~/.config/nix/nix.conf``). 
 You can build SZL or experiments crate for the platform of your choice by using ``nix build`` command, e.g.
 ```shell
-nix-shell --command "cargo xbuild --release"
+nix build .#coraz7-experiments
 ```
-Currently the ELF output is placed at `target/armv7-none-eabihf/release/experiments`
+Alternatively, you can still use ``cargo xbuild`` within ``nix develop`` shell.
 # Debug
 ## Using the Xilinx toolchain
 Tested with the ZC706 board.
 Run the Xilinx Microprocessor Debugger:
 ```shell
-/opt/Xilinx/14.7/ISE_DS/EDK/bin/lin64/xmd
+nix develop
 cargo xbuild --release -p experiments
 ```
-Connect to target (given it is connected and you have permissions):
+Currently the ELF output is placed at `target/armv7-none-eabihf/release/experiments`, or `result/experiments.elf` for Nix Flakes build.
 ```tcl
 connect arm hw
 ```
-Leave xmd running.
+## Debug
 Start the Xilinx version of the GNU debugger with your latest build:
 ```shell
 /opt/Xilinx/14.7/ISE_DS/EDK/gnu/arm/lin/bin/arm-xilinx-linux-gnueabi-gdb zc706
 ```
 Connect the debugger to xmd over TCP on localhost:
 ```gdb
 target remote :1234
 ```
 Proceed using gdb with `load`, `c`
 ## Using OpenOCD
 ### Running on the ZC706
 ```shell
-nix-shell --command "cargo xbuild --release"
+nix develop
 cargo xbuild --release -p experiments
 cd openocd
 openocd -f zc706.cfg
 ```
@ -49,7 +51,8 @@ openocd -f zc706.cfg
 ### Running on the Cora Z7-10
 ```shell
-nix-shell --command "cd experiments && cargo xbuild --release --no-default-features --features=target_cora_z7_10"
+nix develop
 cargo xbuild --release -p experiments --no-default-features --features=target_coraz7
 cd openocd
 openocd -f cora-z7-10.cfg
 ```
@ -60,40 +63,7 @@ openocd -f cora-z7-10.cfg
 openocd -f zc706.cfg -c "pld load 0 blinker_migen.bit; exit"
 ```
-### Development Process
+## License
 Clone this repo onto your development/build machine and the raspberry pi that controls the Xilinx 7000 board
 On the dev machine, the below script builds zc706 and secure copies it to the target pi (in your pi $HOME directory)
 ```shell
 cd ~/zc706
 ./build.sh $your_user/ssh_id
 ```
 On the pi, we need an information rich environment that includes a relatively reliable `gdb` experience (that includes `ctrl-p` and `ctrl-n` command history that persists across `cgdb` executions), run:
 ```shell
 ssh pi4
 cd zc706
 ./tmux.sh
 ```
 Time to run your code with:
 ```shell
 zynq-connect
 zynq-restart
 c
 ```
 or, for a more succinct experience, (identical to above)
 ```shell
 dc
 dr
 c
 ```
 After every build on your dev machine, simply run:
 ```shell
 dr
 c
 ```
 Sometimes you might need to type `load` after `dr`.
 Copyright (C) 2019-2022 M-Labs Limited.
 Released under the GNU LGPL v3. See the LICENSE file for details.
--- a/armv7-none-eabihf.json
+++ b/armv7-none-eabihf.json
@ -1,18 +1,10 @@
 {
  "abi-blacklist": [
    "stdcall",
    "fastcall",
    "vectorcall",
    "thiscall",
    "win64",
    "sysv64"
  ],
  "arch": "arm",
  "data-layout": "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64",
  "emit-debug-gdb-scripts": false,
  "env": "",
  "executables": true,
-  "features": "+v7,+vfp3,-d32,+thumb2,-neon,+strict-align",
+  "features": "+v7,+vfp3,-d32,+thumb2,-neon",
  "is-builtin": false,
  "linker": "rust-lld",
  "linker-flavor": "ld.lld",
--- a/build.sh
+++ b/build.sh
@ -1 +0,0 @@
 nix-shell --command "cargo xbuild --release" && scp -P 2204 -C target/armv7-none-eabihf/release/zc706-experiments $1@nixbld.m-labs.hk:/home/$1/zc706/zc706.elf
--- a/channel-rust-nightly.toml
+++ b/channel-rust-nightly.toml
--- a/default.nix
+++ b/default.nix
@ -1,63 +0,0 @@
 { # Use master branch of the overlay by default
  mozillaOverlay ? import (builtins.fetchTarball https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz),
  rustManifest ? ./channel-rust-nightly.toml,
 }:
 let
  pkgs = import <nixpkgs> { overlays = [ mozillaOverlay ]; };
  rustcSrc = pkgs.fetchgit {
    url = https://github.com/rust-lang/rust.git;
    # master of 2020-04-25
    rev = "14b15521c52549ebbb113173b4abecd124b5a823";
    sha256 = "0a6bi8g636cajpdrpcfkpza95b7ss7041m9cs6hxcd7h8bf6xhwi";
    fetchSubmodules = true;
  };
  targets = [];
  rustChannelOfTargets = _channel: _date: targets:
    (pkgs.lib.rustLib.fromManifestFile rustManifest {
      inherit (pkgs) stdenv fetchurl patchelf;
    }).rust.override { inherit targets; };
  rust =
    rustChannelOfTargets "nightly" null targets;
  rustPlatform = pkgs.recurseIntoAttrs (pkgs.makeRustPlatform {
    rustc = rust // { src = rustcSrc; };
    cargo = rust;
  });
  gcc = pkgs.pkgsCross.armv7l-hf-multiplatform.buildPackages.gcc;
  xbuildRustPackage = { cargoFeatures, crateSubdir, ... } @ attrs:
    let
      buildPkg = rustPlatform.buildRustPackage attrs;
    in
    buildPkg.overrideAttrs ({ name, nativeBuildInputs, ... }: {
      nativeBuildInputs =
        nativeBuildInputs ++ [ pkgs.cargo-xbuild ];
      buildPhase = ''
        pushd ${crateSubdir}
        cargo xbuild --release --frozen \
          --no-default-features \
          --features=${cargoFeatures}
        popd
      '';
      XARGO_RUST_SRC = "${rustcSrc}/src";
      installPhase = ''
        mkdir $out
        ls -la target/armv7-none-eabihf/release/
        cp target/armv7-none-eabihf/release/${name} $out/${name}.elf
      '';
    });
  xbuildCrate = name: crate: features: xbuildRustPackage rec {
    name = "${crate}";
    src = ./.;
    crateSubdir = crate;
    cargoSha256 = "0xlynsr94dyv0g41qwk5490w3wnzd5g70msaih6mcbgr3v4s2q34";
    cargoFeatures = features;
    doCheck = false;
    dontFixup = true;
  };
 in {
  inherit pkgs rustPlatform rustcSrc gcc;
  zc706 = {
    experiments-zc706 = xbuildCrate "experiments-zc706" "experiments" "target_zc706";
    experiments-cora = xbuildCrate "experiments-cora" "experiments" "target_cora_z7_10";
  };
 }
--- a/experiments/Cargo.toml
+++ b/experiments/Cargo.toml
@ -2,12 +2,15 @@
 name = "experiments"
 description = "Developing bare-metal Rust on Zynq"
 version = "0.0.0"
-authors = ["Astro <astro@spaceboyz.net>"]
+authors = ["M-Labs"]
 edition = "2018"
 [features]
 target_zc706 = ["libboard_zynq/target_zc706", "libsupport_zynq/target_zc706"]
-target_cora_z7_10 = ["libboard_zynq/target_cora_z7_10", "libsupport_zynq/target_cora_z7_10"]
+target_coraz7 = ["libboard_zynq/target_coraz7", "libsupport_zynq/target_coraz7"]
 target_ebaz4205 = ["libboard_zynq/target_ebaz4205", "libsupport_zynq/target_ebaz4205"]
 target_redpitaya = ["libboard_zynq/target_redpitaya", "libsupport_zynq/target_redpitaya"]
 target_kasli_soc = ["libboard_zynq/target_kasli_soc", "libsupport_zynq/target_kasli_soc"]
 default = ["target_zc706"]
 [dependencies]
@ -16,5 +19,5 @@ embedded-hal = "0.2"
 libregister = { path = "../libregister" }
 libcortex_a9 = { path = "../libcortex_a9" }
 libboard_zynq = { path = "../libboard_zynq" }
-libsupport_zynq = { path = "../libsupport_zynq" }
+libsupport_zynq = { path = "../libsupport_zynq", default-features = false, features = ["panic_handler", "dummy_fiq_handler"]}
 libasync = { path = "../libasync" }
--- a/experiments/link.x
+++ b/experiments/link.x
@ -1,14 +1,4 @@
-ENTRY(_boot_cores);
+ENTRY(Reset);
 /* Provide some defaults */
 PROVIDE(Reset = _boot_cores);
 PROVIDE(UndefinedInstruction = Reset);
 PROVIDE(SoftwareInterrupt = Reset);
 PROVIDE(PrefetchAbort = Reset);
 PROVIDE(DataAbort = Reset);
 PROVIDE(ReservedException = Reset);
 PROVIDE(IRQ = Reset);
 PROVIDE(FIQ = Reset);
 MEMORY
 {
@ -42,19 +32,37 @@ SECTIONS
        *(.bss .bss.*);
        . = ALIGN(4);
        __bss_end = .;
-    } > OCM
+    } > OCM3
    .irq_stack1 (NOLOAD) : ALIGN(8)
    {
        __irq_stack1_end = .;
        . += 0x100;
        __irq_stack1_start = .;
    } > OCM3
    .irq_stack0 (NOLOAD) : ALIGN(8)
    {
        __irq_stack0_end = .;
        . += 0x100;
        __irq_stack0_start = .;
    } > OCM3
    .stack1 (NOLOAD) : ALIGN(8) {
        __stack1_end = .;
        . += 0x200;
        __stack1_start = .;
-    } > OCM
+    } > OCM3
    .stack0 (NOLOAD) : ALIGN(8) {
        __stack0_end = .;
-        . = ORIGIN(OCM) + LENGTH(OCM) - 8;
+        . = ORIGIN(OCM3) + LENGTH(OCM3) - 8;
        __stack0_start = .;
-    } > OCM
+
        /* unused heap0 to prevent the linker from complaining*/
        __heap0_start = .;
        __heap0_end = .;
    } > OCM3
    /DISCARD/ :
    {
--- a/experiments/src/main.rs
+++ b/experiments/src/main.rs
@ -1,10 +1,14 @@
 #![no_std]
 #![no_main]
 #![allow(incomplete_features)]
 #![feature(naked_functions)]
 #![feature(asm)]
 #![feature(inline_const)]
 extern crate alloc;
-use alloc::{borrow::ToOwned, collections::BTreeMap, format};
+use alloc::collections::BTreeMap;
-use core::task::Poll;
+use core::arch::asm;
 use libasync::{
    delay,
    smoltcp::{Sockets, TcpStream},
@ -14,65 +18,119 @@ use libboard_zynq::{
    self as zynq,
    clocks::source::{ArmPll, ClockSource, IoPll},
    clocks::Clocks,
-    print, println,
+    println, stdio,
-    setup_l2cache,
+    mpcore,
-    sdio::sd_card::SdCard,
+    gic,
    smoltcp::{
        self,
        iface::{EthernetInterfaceBuilder, NeighborCache, Routes},
        time::Instant,
        wire::{EthernetAddress, IpAddress, IpCidr},
    },
    time::Milliseconds,
 };
 #[cfg(feature = "target_zc706")]
 use libboard_zynq::print;
 use libcortex_a9::{
    mutex::Mutex,
-    sync_channel::{self, sync_channel},
+    l2c::enable_l2_cache,
    sync_channel::{Sender, Receiver},
    sync_channel,
    regs::{MPIDR, SP},
    spin_lock_yield, notify_spin_lock,
    asm, interrupt_handler
 };
-use libregister::RegisterR;
+use libregister::{RegisterR, RegisterW};
 use libsupport_zynq::{
-    boot, ram,
+    boot, exception_vectors, ram,
 };
 use log::{info, warn};
-
+use core::sync::atomic::{AtomicBool, Ordering};
 mod ps7_init;
 const HWADDR: [u8; 6] = [0, 0x23, 0xde, 0xea, 0xbe, 0xef];
 static mut CORE1_REQ: (Sender<usize>, Receiver<usize>) = sync_channel!(usize, 10);
 static mut CORE1_RES: (Sender<usize>, Receiver<usize>) = sync_channel!(usize, 10);
 extern "C" {
    static mut __stack1_start: u32;
 }
 static CORE1_RESTART: AtomicBool = AtomicBool::new(false);
 interrupt_handler!(IRQ, irq, __irq_stack0_start, __irq_stack1_start, {
    let mpcore = mpcore::RegisterBlock::mpcore();
    let mut gic = gic::InterruptController::gic(mpcore);
    let id = gic.get_interrupt_id();
    match MPIDR.read().cpu_id(){
        0 => {
            if id.0 == 0 {
                println!("Interrupting core0...");
                gic.end_interrupt(id);
                return;
            }
        },
        1 => {
            if id.0 == 0 {
                gic.end_interrupt(id);
                asm::exit_irq();
                SP.write(&mut __stack1_start as *mut _ as u32);
                asm::enable_irq();
                CORE1_RESTART.store(false, Ordering::Relaxed);
                notify_spin_lock();
                main_core1();
            }
        },
        _ => {}
    }
    stdio::drop_uart();
    println!("IRQ");
    loop {}
 });
 pub fn restart_core1() {
    let mut interrupt_controller = gic::InterruptController::gic(mpcore::RegisterBlock::mpcore());
    CORE1_RESTART.store(true, Ordering::Relaxed);
    interrupt_controller.send_sgi(gic::InterruptId(0), gic::CPUCore::Core1.into());
    while CORE1_RESTART.load(Ordering::Relaxed) {
        spin_lock_yield();
    }
 }
 #[no_mangle]
 pub fn main_core0() {
    exception_vectors::set_vector_table(0x0);
    // zynq::clocks::CpuClocks::enable_io(1_250_000_000);
-    println!("\nzc706 main");
+    enable_l2_cache(0x8);
    println!("\nZynq experiments");
    let mut interrupt_controller = gic::InterruptController::gic(mpcore::RegisterBlock::mpcore());
    interrupt_controller.enable_interrupts();
    libboard_zynq::logger::init().unwrap();
    log::set_max_level(log::LevelFilter::Trace);
    info!(
        "Boot mode: {:?}",
-        zynq::slcr::RegisterBlock::new()
+        zynq::slcr::RegisterBlock::slcr()
            .boot_mode
            .read()
            .boot_mode_pins()
    );
-    #[cfg(feature = "target_zc706")]
+    #[cfg(any(
        feature = "target_zc706",
        feature = "target_ebaz4205",
        feature = "target_redpitaya",
        feature = "target_kasli_soc",
    ))]
    const CPU_FREQ: u32 = 800_000_000;
-    #[cfg(feature = "target_cora_z7_10")]
+    #[cfg(feature = "target_coraz7")]
    const CPU_FREQ: u32 = 650_000_000;
    info!("Setup clock sources...");
    ArmPll::setup(2 * CPU_FREQ);
    Clocks::set_cpu_freq(CPU_FREQ);
    #[cfg(feature = "target_zc706")]
    {
    IoPll::setup(1_000_000_000);
    libboard_zynq::stdio::drop_uart();
    }
    #[cfg(feature = "target_cora_z7_10")]
    {
        IoPll::setup(1_000_000_000);
        libboard_zynq::stdio::drop_uart();
    }
    info!("PLLs set up");
    let clocks = zynq::clocks::Clocks::get();
    info!(
@ -82,109 +140,82 @@ pub fn main_core0() {
        clocks.cpu_2x(),
        clocks.cpu_1x()
    );
    info!("Setup L2Cache");
    setup_l2cache();
    info!("L2Cache done");
 if false {
    let sd = libboard_zynq::sdio::SDIO::sdio0(true);
    // only test SD card if it is inserted
    if sd.is_card_inserted() {
        let result = SdCard::from_sdio(sd);
        match &result {
            Ok(_) => info!("OK!"),
            Err(a) => info!("{}", a),
        };
        const SIZE: usize = 512 * 2 + 1;
        let mut sd_card = result.unwrap();
        {
            let buffer: [u8; SIZE] = [5; SIZE];
            sd_card.write_block(0x0, 2, &buffer).unwrap();
        }
        let mut buffer: [u8; SIZE] = [0; SIZE];
        sd_card.read_block(0x1, 2, &mut buffer[1..]).unwrap();
        for i in 0..buffer.len() {
            info!("buffer[{}] = {}", i, buffer[i]);
        }
        info!("End");
    }
    let mut flash = zynq::flash::Flash::new(200_000_000).linear_addressing_mode();
    let flash_ram: &[u8] = unsafe { core::slice::from_raw_parts(flash.ptr(), flash.size()) };
    for i in 0..=1 {
        print!("Flash {}:", i);
        for b in &flash_ram[(i * 16 * 1024 * 1024)..][..128] {
            print!(" {:02X}", *b);
        }
        println!("");
    }
    let mut flash = flash.stop();
 }
    let timer = libboard_zynq::timer::GlobalTimer::start();
-    let mut ddr = zynq::ddr::DdrRam::new();
+    let mut ddr = zynq::ddr::DdrRam::ddrram();
    #[cfg(not(feature = "target_zc706"))]
    ddr.memtest();
    ram::init_alloc_ddr(&mut ddr);
-if false {
+    info!("Send software interrupt to core0");
-    #[cfg(dev)]
+    interrupt_controller.send_sgi(gic::InterruptId(0), gic::CPUCore::Core0.into());
-    for i in 0..=1 {
+    info!("Core0 returned from interrupt");
        let mut flash_io = flash.manual_mode(i);
        // println!("rdcr={:02X}", flash_io.rdcr());
        print!("Flash {} ID:", i);
        for b in flash_io.rdid() {
            print!(" {:02X}", b);
        }
        println!("");
        print!("Flash {} I/O:", i);
        for o in 0..8 {
            const CHUNK: u32 = 8;
            for b in flash_io.read(CHUNK * o, CHUNK as usize) {
                print!(" {:02X}", b);
            }
        }
        println!("");
-        flash_io.dump("Read cr1", 0x35);
+    boot::Core1::start(false);
        flash_io.dump("Read Autoboot", 0x14);
        flash_io.dump("Read Bank", 0x16);
        flash_io.dump("DLP Bank", 0x16);
        flash_io.dump("Read ESig", 0xAB);
        flash_io.dump("OTP Read", 0x4B);
        flash_io.dump("DYB Read", 0xE0);
        flash_io.dump("PPB Read", 0xE2);
        flash_io.dump("ASP Read", 0x2B);
        flash_io.dump("Password Read", 0xE7);
-        flash_io.write_enabled(|flash_io| {
+    let core1_req = unsafe { &mut CORE1_REQ.0 };
-            flash_io.erase(0);
+    let core1_res = unsafe { &mut CORE1_RES.1 };
        });
        flash_io.write_enabled(|flash_io| {
            flash_io.program(0, [0x23054223; 0x100 >> 2].iter().cloned());
        });
        flash = flash_io.stop();
    }
    let core1 = boot::Core1::start(false);
    let (mut core1_req, rx) = sync_channel(10);
    *CORE1_REQ.lock() = Some(rx);
    let (tx, mut core1_res) = sync_channel(10);
    *CORE1_RES.lock() = Some(tx);
    task::block_on(async {
        for i in 0..10 {
            restart_core1();
            core1_req.async_send(i).await;
            let j = core1_res.async_recv().await;
            println!("{} -> {}", i, j);
        }
    });
-    core1.disable();
+    unsafe {
        core1_req.drop_elements();
    }
-    let eth = zynq::eth::Eth::default(HWADDR.clone());
+    // Test I2C
    #[cfg(feature = "target_zc706")]
    {
        let mut i2c = zynq::i2c::I2c::i2c0();
        i2c.init().unwrap();
        println!("I2C bit-banging enabled");
        let mut eeprom = zynq::i2c::eeprom::EEPROM::new(&mut i2c, 16);
        // Write to 0x00 and 0x08
        let eeprom_buffer: [u8; 22] = [
            0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb,
            0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee,
            0xef, 0xcd, 0xab, 0x89, 0x67, 0x45, 0x23, 0x01,
        ];
        eeprom.write(0x00, &eeprom_buffer[0..6]).unwrap();
        eeprom.write(0x08, &eeprom_buffer[6..22]).unwrap();
        println!("Data written to EEPROM");
        let mut eeprom_buffer = [0u8; 24];
        // Read from 0x00
        eeprom.read(0x00, &mut eeprom_buffer).unwrap();
        print!("Data read from EEPROM @ 0x00: (hex) ");
        for i in 0..6 {
            print!("{:02x} ", eeprom_buffer[i]);
        }
        println!("");
        // Read from 0x08
        eeprom.read(0x08, &mut eeprom_buffer).unwrap();
        print!("Data read from EEPROM @ 0x08: (hex) ");
        for i in 0..16 {
            print!("{:02x} ", eeprom_buffer[i]);
        }
        println!("");
    }
    #[cfg(feature = "target_kasli_soc")]
    {
        let mut err_cdwn = timer.countdown();
        let mut err_state = true;
        let mut led = zynq::error_led::ErrorLED::error_led();
        task::spawn( async move { 
            loop {
                led.toggle(err_state);
                err_state = !err_state;
                delay(&mut err_cdwn, Milliseconds(1000)).await;
            }
        });
    }
    let eth = zynq::eth::Eth::eth0(HWADDR.clone());
    println!("Eth on");
    const RX_LEN: usize = 4096;
@ -207,44 +238,9 @@ if false {
        .neighbor_cache(neighbor_cache)
        .finalize();
    #[cfg(feature = "target_zc706")]
    ps7_init::report_differences();
    Sockets::init(32);
    /// `chargen`
    const TCP_PORT: u16 = 19;
    async fn handle_connection(stream: TcpStream) -> smoltcp::Result<()> {
        stream.send("Enter your name: ".bytes()).await?;
        let name = stream
            .recv(|buf| {
                for (i, b) in buf.iter().enumerate() {
                    if *b == '\n' as u8 {
                        return match core::str::from_utf8(&buf[0..i]) {
                            Ok(name) => Poll::Ready((i + 1, Some(name.to_owned()))),
                            Err(_) => Poll::Ready((i + 1, None)),
                        };
                    }
                }
                if buf.len() > 100 {
                    // Too much input, consume all
                    Poll::Ready((buf.len(), None))
                } else {
                    Poll::Pending
                }
            })
            .await?;
        match name {
            Some(name) => stream.send(format!("Hello {}!\n", name).bytes()).await?,
            None => {
                stream
                    .send("I had trouble reading your name.\n".bytes())
                    .await?
            }
        }
        let _ = stream.close().await;
        Ok(())
    }
    const TCP_PORT: u16 = 19;
    // (rx, tx)
    let stats = alloc::rc::Rc::new(core::cell::RefCell::new((0, 0)));
    let stats_tx = stats.clone();
@ -252,12 +248,12 @@ if false {
        while let Ok(stream) = TcpStream::accept(TCP_PORT, 0x10_0000, 0x10_0000).await {
            let stats_tx = stats_tx.clone();
            task::spawn(async move {
-                let tx_data = (0..=255).take(65536).collect::<alloc::vec::Vec<u8>>();
+                let tx_data = (0..=255).cycle().take(4096).collect::<alloc::vec::Vec<u8>>();
                loop {
                    // const CHUNK_SIZE: usize = 65536;
                    // match stream.send((0..=255).cycle().take(CHUNK_SIZE)).await {
                    match stream.send_slice(&tx_data[..]).await {
-                        Ok(len) => stats_tx.borrow_mut().1 += tx_data.len(), //CHUNK_SIZE,
+                        Ok(_len) => stats_tx.borrow_mut().1 += tx_data.len(), //CHUNK_SIZE,
                        Err(e) => {
                            warn!("tx: {:?}", e);
                            break
@ -273,7 +269,7 @@ if false {
            let stats_rx = stats_rx.clone();
            task::spawn(async move {
                loop {
-                    match stream.recv(|buf| Poll::Ready((buf.len(), buf.len()))).await {
+                    match stream.recv(|buf| (buf.len(), buf.len())).await {
                        Ok(len) => stats_rx.borrow_mut().0 += len,
                        Err(e) => {
                            warn!("rx: {:?}", e);
@ -290,7 +286,7 @@ if false {
        loop {
            delay(&mut countdown, Milliseconds(1000)).await;
-            let timestamp = timer.get_us();
+            let timestamp = timer.get_us().0;
            let seconds = timestamp / 1_000_000;
            let micros = timestamp % 1_000_000;
            let (rx, tx) = {
@ -308,27 +304,18 @@ if false {
    })
 }
 static CORE1_REQ: Mutex<Option<sync_channel::Receiver<usize>>> = Mutex::new(None);
 static CORE1_RES: Mutex<Option<sync_channel::Sender<usize>>> = Mutex::new(None);
 static DONE: Mutex<bool> = Mutex::new(false);
 #[no_mangle]
 pub fn main_core1() {
    println!("Hello from core1!");
-
+    let mut interrupt_controller = gic::InterruptController::gic(mpcore::RegisterBlock::mpcore());
-    let mut req = None;
+    interrupt_controller.enable_interrupts();
-    while req.is_none() {
+    let req = unsafe { &mut CORE1_REQ.1 };
-        req = CORE1_REQ.lock().take();
+    let res = unsafe { &mut CORE1_RES.0 };
    }
    let req = req.unwrap();
    let mut res = None;
    while res.is_none() {
        res = CORE1_RES.lock().take();
    }
    let mut res = res.unwrap();
    for i in req {
-        res.send(*i * *i);
+        res.send(i * i);
    }
    println!("core1 done!");
--- a/experiments/src/ps7_init/mod.rs
+++ b/experiments/src/ps7_init/mod.rs
@ -1,68 +0,0 @@
 #![cfg(feature = "target_zc706")]
 use libboard_zynq::println;
 mod zc706;
 // mod cora_z7_10;
 #[cfg(feature = "target_zc706")]
 use zc706 as target;
 // #[cfg(feature = "target_cora_z7_10")]
 // use cora_z7_10 as target;
 pub fn report_differences() {
    for (i, op) in target::INIT_DATA.iter().enumerate() {
        let address = op.address();
        let overwritten_later = target::INIT_DATA[(i + 1)..].iter()
            .any(|later_op| later_op.address() == address);
        if !overwritten_later {
            op.report_difference();
        }
    }
 }
 pub enum InitOp {
    MaskWrite(usize, usize, usize),
    MaskPoll(usize, usize),
 }
 impl InitOp {
    fn address(&self) -> usize {
        match self {
            InitOp::MaskWrite(address, _, _) => *address,
            InitOp::MaskPoll(address, _) => *address,
        }
    }
    fn read(&self) -> usize {
        unsafe { *(self.address() as *const usize) }
    }
    fn difference(&self) -> Option<(usize, usize)> {
        let (mask, expected) = match self {
            InitOp::MaskWrite(_, mask, expected) =>
                (*mask, *expected),
            InitOp::MaskPoll(_, mask) =>
                (*mask, *mask),
        };
        let actual = self.read();
        if actual & mask == expected {
            None
        } else {
            Some((actual & mask, expected))
        }
    }
    pub fn report_difference(&self) {
        if let Some((actual, expected)) = self.difference() {
            println!(
                "Register {:08X} is {:08X}&={:08X} != {:08X} expected",
                self.address(),
                self.read(),
                actual,
                expected
            );
        }
    }
 }
--- a/experiments/src/ps7_init/zc706.rs
+++ b/experiments/src/ps7_init/zc706.rs
@ -1,203 +0,0 @@
 use super::InitOp::{self, *};
 pub const INIT_DATA: &'static [InitOp] = &[
    // ps7_mio_init_data_1_0
    MaskWrite(0xF8000B40, 0x00000FFF, 0x00000600),
    MaskWrite(0xF8000B44, 0x00000FFF, 0x00000600),
    MaskWrite(0xF8000B48, 0x00000FFF, 0x00000672),
    MaskWrite(0xF8000B4C, 0x00000FFF, 0x00000672),
    MaskWrite(0xF8000B50, 0x00000FFF, 0x00000674),
    MaskWrite(0xF8000B54, 0x00000FFF, 0x00000674),
    MaskWrite(0xF8000B58, 0x00000FFF, 0x00000600),
    MaskWrite(0xF8000B5C, 0xFFFFFFFF, 0x0018C61C),
    MaskWrite(0xF8000B60, 0xFFFFFFFF, 0x00F9861C),
    MaskWrite(0xF8000B64, 0xFFFFFFFF, 0x00F9861C),
    MaskWrite(0xF8000B68, 0xFFFFFFFF, 0x00F9861C),
    MaskWrite(0xF8000B6C, 0x000073FF, 0x00000209),
    MaskWrite(0xF8000B70, 0x00000021, 0x00000021),
    MaskWrite(0xF8000B70, 0x00000021, 0x00000020),
    MaskWrite(0xF8000B70, 0x07FFFFFF, 0x00000823),
    MaskWrite(0xF8000700, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000704, 0x00003FFF, 0x00000702),
    MaskWrite(0xF8000708, 0x00003FFF, 0x00000702),
    MaskWrite(0xF800070C, 0x00003FFF, 0x00000702),
    MaskWrite(0xF8000710, 0x00003FFF, 0x00000702),
    MaskWrite(0xF8000714, 0x00003FFF, 0x00000702),
    MaskWrite(0xF8000718, 0x00003FFF, 0x00000702),
    MaskWrite(0xF800071C, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000720, 0x00003FFF, 0x00000700),
    MaskWrite(0xF8000724, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000728, 0x00003FFF, 0x00000600),
    MaskWrite(0xF800072C, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000730, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000734, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000738, 0x00003FFF, 0x00000600),
    MaskWrite(0xF800073C, 0x00003FFF, 0x00000600),
    MaskWrite(0xF8000740, 0x00003FFF, 0x00000302),
    MaskWrite(0xF8000744, 0x00003FFF, 0x00000302),
    MaskWrite(0xF8000748, 0x00003FFF, 0x00000302),
    MaskWrite(0xF800074C, 0x00003FFF, 0x00000302),
    MaskWrite(0xF8000750, 0x00003FFF, 0x00000302),
    MaskWrite(0xF8000754, 0x00003FFF, 0x00000302),
    MaskWrite(0xF8000758, 0x00003FFF, 0x00000303),
    MaskWrite(0xF800075C, 0x00003FFF, 0x00000303),
    MaskWrite(0xF8000760, 0x00003FFF, 0x00000303),
    MaskWrite(0xF8000764, 0x00003FFF, 0x00000303),
    MaskWrite(0xF8000768, 0x00003FFF, 0x00000303),
    MaskWrite(0xF800076C, 0x00003FFF, 0x00000303),
    MaskWrite(0xF8000770, 0x00003FFF, 0x00000304),
    MaskWrite(0xF8000774, 0x00003FFF, 0x00000305),
    MaskWrite(0xF8000778, 0x00003FFF, 0x00000304),
    MaskWrite(0xF800077C, 0x00003FFF, 0x00000305),
    MaskWrite(0xF8000780, 0x00003FFF, 0x00000304),
    MaskWrite(0xF8000784, 0x00003FFF, 0x00000304),
    MaskWrite(0xF8000788, 0x00003FFF, 0x00000304),
    MaskWrite(0xF800078C, 0x00003FFF, 0x00000304),
    MaskWrite(0xF8000790, 0x00003FFF, 0x00000305),
    MaskWrite(0xF8000794, 0x00003FFF, 0x00000304),
    MaskWrite(0xF8000798, 0x00003FFF, 0x00000304),
    MaskWrite(0xF800079C, 0x00003FFF, 0x00000304),
    MaskWrite(0xF80007A0, 0x00003FFF, 0x00000380),
    MaskWrite(0xF80007A4, 0x00003FFF, 0x00000380),
    MaskWrite(0xF80007A8, 0x00003FFF, 0x00000380),
    MaskWrite(0xF80007AC, 0x00003FFF, 0x00000380),
    MaskWrite(0xF80007B0, 0x00003FFF, 0x00000380),
    MaskWrite(0xF80007B4, 0x00003FFF, 0x00000380),
    MaskWrite(0xF80007B8, 0x00003F01, 0x00000201),
    MaskWrite(0xF80007BC, 0x00003F01, 0x00000201),
    MaskWrite(0xF80007C0, 0x00003FFF, 0x000002E0),
    MaskWrite(0xF80007C4, 0x00003FFF, 0x000002E1),
    MaskWrite(0xF80007C8, 0x00003FFF, 0x00000200),
    MaskWrite(0xF80007CC, 0x00003FFF, 0x00000200),
    MaskWrite(0xF80007D0, 0x00003FFF, 0x00000280),
    MaskWrite(0xF80007D4, 0x00003FFF, 0x00000280),
    MaskWrite(0xF8000830, 0x003F003F, 0x002F002E),
    // ps7_pll_init_data_1_0
    MaskWrite(0xF8000110, 0x003FFFF0, 0x000FA220),
    MaskWrite(0xF8000100, 0x0007F000, 0x00028000),
    MaskWrite(0xF8000100, 0x00000010, 0x00000010),
    MaskWrite(0xF8000100, 0x00000001, 0x00000001),
    MaskWrite(0xF8000100, 0x00000001, 0x00000000),
    MaskPoll(0xF800010C, 0x00000001),
    MaskWrite(0xF8000100, 0x00000010, 0x00000000),
    MaskWrite(0xF8000120, 0x1F003F30, 0x1F000200),
    MaskWrite(0xF8000114, 0x003FFFF0, 0x0012C220),
    MaskWrite(0xF8000104, 0x0007F000, 0x00020000),
    MaskWrite(0xF8000104, 0x00000010, 0x00000010),
    MaskWrite(0xF8000104, 0x00000001, 0x00000001),
    MaskWrite(0xF8000104, 0x00000001, 0x00000000),
    MaskPoll(0xF800010C, 0x00000002),
    MaskWrite(0xF8000104, 0x00000010, 0x00000000),
    MaskWrite(0xF8000124, 0xFFF00003, 0x0C200003),
    MaskWrite(0xF8000118, 0x003FFFF0, 0x001452C0),
    MaskWrite(0xF8000108, 0x0007F000, 0x0001E000),
    MaskWrite(0xF8000108, 0x00000010, 0x00000010),
    MaskWrite(0xF8000108, 0x00000001, 0x00000001),
    MaskWrite(0xF8000108, 0x00000001, 0x00000000),
    MaskPoll(0xF800010C, 0x00000004),
    MaskWrite(0xF8000108, 0x00000010, 0x00000000),
    // ps7_clock_init_data_1_0
    MaskWrite(0xF8000128, 0x03F03F01, 0x00700F01),
    MaskWrite(0xF8000138, 0x00000011, 0x00000001),
    MaskWrite(0xF8000140, 0x03F03F71, 0x00100801),
    MaskWrite(0xF800014C, 0x00003F31, 0x00000501),
    MaskWrite(0xF8000150, 0x00003F33, 0x00001401),
    MaskWrite(0xF8000154, 0x00003F33, 0x00001402),
    MaskWrite(0xF8000168, 0x00003F31, 0x00000501),
    MaskWrite(0xF8000170, 0x03F03F30, 0x00200400),
    MaskWrite(0xF80001C4, 0x00000001, 0x00000001),
    MaskWrite(0xF800012C, 0x01FFCCCD, 0x01EC044D),
    // ps7_ddr_init_data_1_0
    MaskWrite(0xF8006000, 0x0001FFFF, 0x00000080),
    MaskWrite(0xF8006004, 0x1FFFFFFF, 0x00081081),
    MaskWrite(0xF8006008, 0x03FFFFFF, 0x03C0780F),
    MaskWrite(0xF800600C, 0x03FFFFFF, 0x02001001),
    MaskWrite(0xF8006010, 0x03FFFFFF, 0x00014001),
    MaskWrite(0xF8006014, 0x001FFFFF, 0x0004159B),
    MaskWrite(0xF8006018, 0xF7FFFFFF, 0x452460D2),
    MaskWrite(0xF800601C, 0xFFFFFFFF, 0x720238E5),
    MaskWrite(0xF8006020, 0xFFFFFFFC, 0x272872D0),
    MaskWrite(0xF8006024, 0x0FFFFFFF, 0x0000003C),
    MaskWrite(0xF8006028, 0x00003FFF, 0x00002007),
    MaskWrite(0xF800602C, 0xFFFFFFFF, 0x00000008),
    MaskWrite(0xF8006030, 0xFFFFFFFF, 0x00040930),
    MaskWrite(0xF8006034, 0x13FF3FFF, 0x000116D4),
    MaskWrite(0xF8006038, 0x00001FC3, 0x00000000),
    MaskWrite(0xF800603C, 0x000FFFFF, 0x00000777),
    MaskWrite(0xF8006040, 0xFFFFFFFF, 0xFFF00000),
    MaskWrite(0xF8006044, 0x0FFFFFFF, 0x0FF66666),
    MaskWrite(0xF8006048, 0x3FFFFFFF, 0x0003C248),
    MaskWrite(0xF8006050, 0xFF0F8FFF, 0x77010800),
    MaskWrite(0xF8006058, 0x0001FFFF, 0x00000101),
    MaskWrite(0xF800605C, 0x0000FFFF, 0x00005003),
    MaskWrite(0xF8006060, 0x000017FF, 0x0000003E),
    MaskWrite(0xF8006064, 0x00021FE0, 0x00020000),
    MaskWrite(0xF8006068, 0x03FFFFFF, 0x00284141),
    MaskWrite(0xF800606C, 0x0000FFFF, 0x00001610),
    MaskWrite(0xF80060A0, 0x00FFFFFF, 0x00008000),
    MaskWrite(0xF80060A4, 0xFFFFFFFF, 0x10200802),
    MaskWrite(0xF80060A8, 0x0FFFFFFF, 0x0690CB73),
    MaskWrite(0xF80060AC, 0x000001FF, 0x000001FE),
    MaskWrite(0xF80060B0, 0x1FFFFFFF, 0x1CFFFFFF),
    MaskWrite(0xF80060B4, 0x000007FF, 0x00000200),
    MaskWrite(0xF80060B8, 0x01FFFFFF, 0x00200066),
    MaskWrite(0xF80060C4, 0x00000003, 0x00000000),
    MaskWrite(0xF80060C8, 0x000000FF, 0x00000000),
    MaskWrite(0xF80060DC, 0x00000001, 0x00000000),
    MaskWrite(0xF80060F0, 0x0000FFFF, 0x00000000),
    MaskWrite(0xF80060F4, 0x0000000F, 0x00000008),
    MaskWrite(0xF8006114, 0x000000FF, 0x00000000),
    MaskWrite(0xF8006118, 0x7FFFFFFF, 0x40000001),
    MaskWrite(0xF800611C, 0x7FFFFFFF, 0x40000001),
    MaskWrite(0xF8006120, 0x7FFFFFFF, 0x40000001),
    MaskWrite(0xF8006124, 0x7FFFFFFF, 0x40000001),
    MaskWrite(0xF800612C, 0x000FFFFF, 0x00033C03),
    MaskWrite(0xF8006130, 0x000FFFFF, 0x00034003),
    MaskWrite(0xF8006134, 0x000FFFFF, 0x0002F400),
    MaskWrite(0xF8006138, 0x000FFFFF, 0x00030400),
    MaskWrite(0xF8006140, 0x000FFFFF, 0x00000035),
    MaskWrite(0xF8006144, 0x000FFFFF, 0x00000035),
    MaskWrite(0xF8006148, 0x000FFFFF, 0x00000035),
    MaskWrite(0xF800614C, 0x000FFFFF, 0x00000035),
    MaskWrite(0xF8006154, 0x000FFFFF, 0x00000083),
    MaskWrite(0xF8006158, 0x000FFFFF, 0x00000083),
    MaskWrite(0xF800615C, 0x000FFFFF, 0x00000080),
    MaskWrite(0xF8006160, 0x000FFFFF, 0x00000080),
    MaskWrite(0xF8006168, 0x001FFFFF, 0x00000124),
    MaskWrite(0xF800616C, 0x001FFFFF, 0x00000125),
    MaskWrite(0xF8006170, 0x001FFFFF, 0x00000112),
    MaskWrite(0xF8006174, 0x001FFFFF, 0x00000116),
    MaskWrite(0xF800617C, 0x000FFFFF, 0x000000C3),
    MaskWrite(0xF8006180, 0x000FFFFF, 0x000000C3),
    MaskWrite(0xF8006184, 0x000FFFFF, 0x000000C0),
    MaskWrite(0xF8006188, 0x000FFFFF, 0x000000C0),
    MaskWrite(0xF8006190, 0xFFFFFFFF, 0x10040080),
    MaskWrite(0xF8006194, 0x000FFFFF, 0x0001FC82),
    MaskWrite(0xF8006204, 0xFFFFFFFF, 0x00000000),
    MaskWrite(0xF8006208, 0x000F03FF, 0x000803FF),
    MaskWrite(0xF800620C, 0x000F03FF, 0x000803FF),
    MaskWrite(0xF8006210, 0x000F03FF, 0x000803FF),
    MaskWrite(0xF8006214, 0x000F03FF, 0x000803FF),
    MaskWrite(0xF8006218, 0x000F03FF, 0x000003FF),
    MaskWrite(0xF800621C, 0x000F03FF, 0x000003FF),
    MaskWrite(0xF8006220, 0x000F03FF, 0x000003FF),
    MaskWrite(0xF8006224, 0x000F03FF, 0x000003FF),
    MaskWrite(0xF80062A8, 0x00000FF7, 0x00000000),
    MaskWrite(0xF80062AC, 0xFFFFFFFF, 0x00000000),
    MaskWrite(0xF80062B0, 0x003FFFFF, 0x00005125),
    MaskWrite(0xF80062B4, 0x0003FFFF, 0x000012A8),
    MaskPoll(0xF8000B74, 0x00002000),
    MaskWrite(0xF8006000, 0x0001FFFF, 0x00000081),
    MaskPoll(0xF8006054, 0x00000007),
    // ps7_peripherals_init_data_1_0
    MaskWrite(0xF8000B48, 0x00000180, 0x00000180),
    MaskWrite(0xF8000B4C, 0x00000180, 0x00000180),
    MaskWrite(0xF8000B50, 0x00000180, 0x00000180),
    MaskWrite(0xF8000B54, 0x00000180, 0x00000180),
    MaskWrite(0xE0001034, 0x000000FF, 0x00000006),
    MaskWrite(0xE0001018, 0x0000FFFF, 0x0000003E),
    MaskWrite(0xE0001000, 0x000001FF, 0x00000017),
    MaskWrite(0xE0001004, 0x00000FFF, 0x00000020),
    MaskWrite(0xE000D000, 0x00080000, 0x00080000),
    MaskWrite(0xF8007000, 0x20000000, 0x00000000),
 ];
--- a/flake.lock
+++ b/flake.lock
@ -0,0 +1,49 @@
 {
  "nodes": {
    "nixpkgs": {
      "locked": {
        "lastModified": 1734529975,
        "narHash": "sha256-ze3IJksru9dN0keqUxY0WNf8xrwfs8Ty/z9v/keyBbg=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "72d11d40b9878a67c38f003c240c2d2e1811e72a",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-24.05",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "nixpkgs": "nixpkgs",
        "rust-overlay": "rust-overlay"
      }
    },
    "rust-overlay": {
      "inputs": {
        "nixpkgs": [
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1719454714,
        "narHash": "sha256-MojqG0lyUINkEk0b3kM2drsU5vyaF8DFZe/FAlZVOGs=",
        "owner": "oxalica",
        "repo": "rust-overlay",
        "rev": "d1c527659cf076ecc4b96a91c702d080b213801e",
        "type": "github"
      },
      "original": {
        "owner": "oxalica",
        "ref": "snapshot/2024-08-01",
        "repo": "rust-overlay",
        "type": "github"
      }
    }
  },
  "root": "root",
  "version": 7
 }
--- a/flake.nix
+++ b/flake.nix
@ -0,0 +1,177 @@
 {
  description = "Bare-metal Rust on Zynq-7000";
  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-24.05;
  inputs.rust-overlay = {
    url = "github:oxalica/rust-overlay?ref=snapshot/2024-08-01";
    inputs.nixpkgs.follows = "nixpkgs";
  };
  outputs = { self, nixpkgs, rust-overlay }:
    let
      pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ (import rust-overlay) crosspkgs-overlay ]; };
      rust = pkgs.rust-bin.nightly."2021-09-01".default.override {
        extensions = [ "rust-src" ];
        targets = [ ];
      };
      rustPlatform = pkgs.makeRustPlatform {
        rustc = rust // {
          # https://github.com/oxalica/rust-overlay/commit/c48c2d76b68dd9ede0815fec53479375c61af857
          targetPlatforms = pkgs.lib.platforms.all;
          tier1TargetPlatforms = pkgs.lib.platforms.all;
          badTargetPlatforms = [ ];
        };
        cargo = rust;
      };
      crosspkgs-overlay = (self: super: {
        pkgsCross = super.pkgsCross // {
          zynq-baremetal = import super.path {
            system = "x86_64-linux";
            crossSystem = {
              config = "arm-none-eabihf";
              libc = "newlib";
              gcc.cpu = "cortex-a9";
              gcc.fpu = "vfpv3";
            };
          };
        };
      });
      mkbootimage = pkgs.stdenv.mkDerivation {
        pname = "mkbootimage";
        version = "2.3dev";
        src = pkgs.fetchFromGitHub {
          owner = "antmicro";
          repo = "zynq-mkbootimage";
          rev = "872363ce32c249f8278cf107bc6d3bdeb38d849f";
          sha256 = "sha256-5FPyAhUWZDwHbqmp9J2ZXTmjaXPz+dzrJMolaNwADHs=";
        };
        propagatedBuildInputs = [ pkgs.libelf pkgs.pcre ];
        patchPhase =
        ''
          substituteInPlace Makefile --replace "git rev-parse --short HEAD" "echo nix"
        '';
        installPhase =
        ''
          mkdir -p $out/bin
          cp mkbootimage $out/bin
        '';
        hardeningDisable = [ "fortify" ];
      };
      fsbl = { board ? "zc706" }: pkgs.stdenv.mkDerivation {
        name = "${board}-fsbl";
        src = pkgs.fetchFromGitHub {
          owner = "Xilinx";
          repo = "embeddedsw";
          rev = "xilinx_v2022.2";
          sha256 = "sha256-UDz9KK/Hw3qM1BAeKif30rE8Bi6C2uvuZlvyvtJCMfw=";
        };
        nativeBuildInputs = [
          pkgs.pkgsCross.zynq-baremetal.buildPackages.binutils
          pkgs.pkgsCross.zynq-baremetal.buildPackages.gcc
        ];
        patchPhase = ''
          patchShebangs lib/sw_apps/zynq_fsbl/misc/copy_bsp.sh
          for x in lib/sw_apps/zynq_fsbl/src/Makefile lib/sw_apps/zynq_fsbl/misc/copy_bsp.sh lib/bsp/standalone/src/arm/cortexa9/gcc/Makefile; do
            substituteInPlace $x \
              --replace "arm-none-eabi-" "arm-none-eabihf-"
          done
        '';
        buildPhase = ''
          cd lib/sw_apps/zynq_fsbl/src
          make BOARD=${board} "CFLAGS=-DFSBL_DEBUG_INFO -g"
        '';
        installPhase = ''
          mkdir $out
          cp fsbl.elf $out
        '';
        doCheck = false;
        dontFixup = true;
      };
      cargo-xbuild = pkgs.cargo-xbuild.overrideAttrs(oa: {
        postPatch = "substituteInPlace src/sysroot.rs --replace 2021 2018";
      });
      build-crate = name: crate: features: rustPlatform.buildRustPackage rec {
        name = "${crate}";
        src = builtins.filterSource (path: type:
          baseNameOf path != "target"
        ) ./.;
        cargoLock = { 
          lockFile = ./Cargo.lock;
          outputHashes = {
            "core_io-0.1.0" = "sha256-0HINFWRiJx8pjMgUOL/CS336ih7SENSRh3Kah9LPRrw="; 
            "fatfs-0.3.6" = "sha256-Nz9hCq/1YgSXF8ltJ5ZawV0Hc8WV44KNK0tJdVnNb4U=";
          };
        };
        nativeBuildInputs = [ cargo-xbuild pkgs.llvmPackages_13.clang-unwrapped ];
        buildPhase = ''
          export XARGO_RUST_SRC="${rust}/lib/rustlib/src/rust/library"
          export CARGO_HOME=$(mktemp -d cargo-home.XXX)
          pushd ${crate}
          cargo xbuild --release --frozen \
            --no-default-features \
            --features=${features}
          popd
        '';
        installPhase = ''
          mkdir -p $out $out/nix-support
          cp target/armv7-none-eabihf/release/${name} $out/${name}.elf
          echo file binary-dist $out/${name}.elf >> $out/nix-support/hydra-build-products
        '';
        doCheck = false;
        dontFixup = true;
        auditable = false;
      };
      targetCrates = target: {
        "${target}-experiments" = build-crate "${target}-experiments" "experiments" "target_${target}";
        "${target}-szl" = build-crate "${target}-szl" "szl" "target_${target}";
      };
      targets = ["zc706" "coraz7" "redpitaya" "kasli_soc" "ebaz4205"];
      allTargetCrates = (builtins.foldl' (results: target:
        results // targetCrates target
      ) {} targets);
      szl = pkgs.runCommand "szl" {} (builtins.foldl' (commands: target:
        let
          szlResult = builtins.getAttr "${target}-szl" allTargetCrates;
        in
          commands + "ln -s ${szlResult}/szl.elf $out/szl-${target}.elf\n"
      ) "mkdir $out\n" targets);
    in rec {
      packages.x86_64-linux = { 
        inherit cargo-xbuild szl mkbootimage;
        zc706-fsbl = fsbl { board = "zc706"; };
      } // allTargetCrates ;
      hydraJobs = packages.x86_64-linux;
      inherit rust rustPlatform;
      devShell.x86_64-linux = pkgs.mkShell {
        name = "zynq-rs-dev-shell";
        buildInputs = [
          rust
          cargo-xbuild
          mkbootimage
          pkgs.openocd pkgs.gdb
          pkgs.openssh pkgs.rsync
          pkgs.llvmPackages_13.clang-unwrapped
          (pkgs.python3.withPackages(ps: [ ps.pyftdi ]))
        ];
      };
    };
 }
--- a/kasli_soc_por.py
+++ b/kasli_soc_por.py
@ -0,0 +1,17 @@
 from time import sleep
 from pyftdi.ftdi import Ftdi
 POR = 1 << 7
 def main():
    dev = Ftdi()
    dev.open_bitbang_from_url("ftdi://ftdi:4232h/0")
    dev.set_bitmode(POR, Ftdi.BitMode.BITBANG)
    dev.write_data(bytes([0]))
    sleep(0.1)
    dev.write_data(bytes([POR]))
    sleep(0.1)
    dev.close()
 if __name__ == "__main__":
    main()
--- a/libasync/Cargo.toml
+++ b/libasync/Cargo.toml
@ -2,17 +2,17 @@
 name = "libasync"
 description = "low-level async support"
 version = "0.0.0"
-authors = ["Astro <astro@spaceboyz.net>"]
+authors = ["M-Labs"]
 edition = "2018"
 [dependencies]
 #futures = { version = "0.3", default-features = false }
 pin-utils = "0.1.0-alpha.4"
 embedded-hal = "0.2"
-nb = "0.1"
+nb = "1.0"
 libcortex_a9 = { path = "../libcortex_a9" }
 [dependencies.smoltcp]
-version = "0.6"
+version = "0.7"
 default-features = false
 features = ["alloc"]
--- a/libasync/src/executor.rs
+++ b/libasync/src/executor.rs
@ -6,7 +6,7 @@ use core::{
    sync::atomic::{AtomicBool, Ordering},
    task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
 };
-use alloc::{boxed::Box, collections::VecDeque as Deque};
+use alloc::{boxed::Box, vec::Vec};
 //use futures::future::FutureExt;
 use pin_utils::pin_mut;
@ -31,7 +31,7 @@ static VTABLE: RawWakerVTable = {
 /// ready should not move as long as this waker references it. That is
 /// the reason for keeping Tasks in a pinned box.
 fn wrap_waker(ready: &AtomicBool) -> Waker {
-    unsafe { Waker::from_raw(RawWaker::new(ready as *const _ as *const _, &VTABLE)) }
+    unsafe { Waker::from_raw(RawWaker::new(ready as *const _ as *const (), &VTABLE)) }
 }
 /// A single-threaded executor
@ -44,7 +44,7 @@ pub struct Executor {
    /// Tasks reside on the heap, so that we just queue pointers. They
    /// must also be pinned in memory because our RawWaker is a pointer
    /// to their `ready` field.
-    tasks: RefCell<Deque<Pin<Box<Task>>>>,
+    tasks: RefCell<Vec<Pin<Box<Task>>>>,
 }
 impl Executor {
@ -52,7 +52,7 @@ impl Executor {
    pub fn new() -> Self {
        Self {
            in_block_on: RefCell::new(false),
-            tasks: RefCell::new(Deque::new()),
+            tasks: RefCell::new(Vec::new()),
        }
    }
@ -72,6 +72,7 @@ impl Executor {
        pin_mut!(f);
        let ready = AtomicBool::new(true);
        let waker = wrap_waker(&ready);
        let mut backup = Vec::new();
        let val = loop {
            // advance the main task
            if ready.load(Ordering::Relaxed) {
@ -85,10 +86,9 @@ impl Executor {
                // println!("ran block_on");
            }
-            // println!("tasks: {}", self.tasks.borrow().len());
+            // advance all tasks
-            // advance other tasks
+            core::mem::swap(&mut *self.tasks.borrow_mut(), &mut backup);
-            let next_task = self.tasks.borrow_mut().pop_front();
+            for mut task in backup.drain(..) {
            if let Some(mut task) = next_task {
                // NOTE we don't need a CAS operation here because `wake` invocations that come from
                // interrupt handlers (the only source of 'race conditions' (!= data races)) are
                // "oneshot": they'll issue a `wake` and then disable themselves to not run again
@ -106,7 +106,7 @@ impl Executor {
                    }
                }
                // Requeue
-                self.tasks.borrow_mut().push_back(task);
+                self.tasks.borrow_mut().push(task);
            }
            // // try to sleep; this will be a no-op if any of the previous tasks generated a SEV or an
@ -119,7 +119,7 @@ impl Executor {
    pub fn spawn(&self, f: impl Future + 'static) {
        let task = Box::pin(Task::new(f));
-        self.tasks.borrow_mut().push_back(task);
+        self.tasks.borrow_mut().push(task);
    }
 }
--- a/libasync/src/smoltcp/mod.rs
+++ b/libasync/src/smoltcp/mod.rs
@ -7,17 +7,23 @@ use smoltcp::{
    iface::EthernetInterface,
    phy::Device,
    socket::SocketSet,
-    time::Instant,
+    time::{Duration, Instant},
 };
 use crate::task;
 mod tcp_stream;
 pub use tcp_stream::TcpStream;
 pub trait LinkCheck {
    type Link;
    fn is_idle(&self) -> bool;
    fn check_link_change(&mut self) -> Option<Self::Link>;
 }
 static mut SOCKETS: Option<Sockets> = None;
 pub struct Sockets {
-    sockets: RefCell<SocketSet<'static, 'static, 'static>>,
+    sockets: RefCell<SocketSet<'static>>,
    wakers: RefCell<Vec<Waker>>,
 }
@ -41,14 +47,24 @@ impl Sockets {
    /// Block and run executor indefinitely while polling the smoltcp
    /// iface
-    pub fn run<'b, 'c, 'e, D: for<'d> Device<'d>>(
+    pub fn run<'b, D: for<'d> Device<'d> + LinkCheck>(
-        iface: &mut EthernetInterface<'b, 'c, 'e, D>,
+        iface: &mut EthernetInterface<'b, D>,
        mut get_time: impl FnMut() -> Instant,
    ) -> ! {
        task::block_on(async {
            let mut last_link_check = Instant::from_millis(0);
            const LINK_CHECK_INTERVAL: u64 = 500;
            loop {
                let instant = get_time();
                Self::instance().poll(iface, instant);
                let dev = iface.device_mut();
                if dev.is_idle() && instant >= last_link_check + Duration::from_millis(LINK_CHECK_INTERVAL) {
                    dev.check_link_change();
                    last_link_check = instant;
                }
                task::r#yield().await;
            }
        })
@ -58,9 +74,9 @@ impl Sockets {
        unsafe { SOCKETS.as_ref().expect("Sockets") }
    }
-    fn poll<'b, 'c, 'e, D: for<'d> Device<'d>>(
+    fn poll<'b, D: for<'d> Device<'d>>(
        &self,
-        iface: &mut EthernetInterface<'b, 'c, 'e, D>,
+        iface: &mut EthernetInterface<'b, D>,
        instant: Instant
    ) {
        let processed = {
@ -81,7 +97,14 @@ impl Sockets {
    /// TODO: this was called through eg. TcpStream, another poll()
    /// might want to send packets before sleeping for an interrupt.
    pub(crate) fn register_waker(waker: Waker) {
-        Self::instance().wakers.borrow_mut()
+        let mut wakers = Self::instance().wakers.borrow_mut();
-            .push(waker);
+        for (i, w) in wakers.iter().enumerate() {
            if w.will_wake(&waker) {
                let last = wakers.len() - 1;
                wakers.swap(i, last);
                return;
            }
        }
        wakers.push(waker);
    }
 }
--- a/libasync/src/smoltcp/tcp_stream.rs
+++ b/libasync/src/smoltcp/tcp_stream.rs
@ -103,21 +103,19 @@ impl TcpStream {
    /// Probe the receive buffer
    ///
-    /// Instead of handing you the data on the heap all at once,
+    /// Your callback will only be called when there is some data available,
-    /// smoltcp's read interface is wrapped so that your callback can
+    /// and it must consume at least one byte. It returns a tuple with the
-    /// just return `Poll::Pending` if there is not enough data
+    /// number of bytes it consumed, and a user-defined return value of type R.
    /// yet. Likewise, return the amount of bytes consumed from the
    /// buffer in the `Poll::Ready` result.
    pub async fn recv<F, R>(&self, f: F) -> Result<R>
    where
-        F: Fn(&[u8]) -> Poll<(usize, R)>,
+        F: Fn(&[u8]) -> (usize, R),
    {
-        struct Recv<'a, F: FnOnce(&[u8]) -> Poll<(usize, R)>, R> {
+        struct Recv<'a, F: FnOnce(&[u8]) -> (usize, R), R> {
            stream: &'a TcpStream,
            f: F,
        }
-        impl<'a, F: Fn(&[u8]) -> Poll<(usize, R)>, R> Future for Recv<'a, F, R> {
+        impl<'a, F: Fn(&[u8]) -> (usize, R), R> Future for Recv<'a, F, R> {
            type Output = Result<R>;
            fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
@ -128,13 +126,9 @@ impl TcpStream {
                    socket.recv(|buf| {
                        if buf.len() > 0 {
-                            match (self.f)(buf) {
+                            let (amount, result) = (self.f)(buf);
-                                Poll::Ready((amount, result)) =>
+                            assert!(amount > 0);
-                                    (amount, Poll::Ready(Ok(result))),
+                            (amount, Poll::Ready(Ok(result)))
                                Poll::Pending =>
                                    // 0 bytes consumed
                                    (0, Poll::Pending),
                            }
                        } else {
                            (0, Poll::Pending)
                        }
@ -268,6 +262,14 @@ impl TcpStream {
    pub fn set_timeout(&mut self, duration: Option<Duration>) {
        self.with_socket(|mut socket| socket.set_timeout(duration));
    }
    pub fn ack_delay(&self) -> Option<Duration> {
        self.with_socket(|socket| socket.ack_delay())
    }
    pub fn set_ack_delay(&mut self, duration: Option<Duration>) {
        self.with_socket(|mut socket| socket.set_ack_delay(duration));
    }
 }
 impl Drop for TcpStream {
--- a/libboard_zynq/Cargo.toml
+++ b/libboard_zynq/Cargo.toml
@ -2,12 +2,16 @@
 name = "libboard_zynq"
 description = "Drivers for peripherals in the Zynq PS"
 version = "0.0.0"
-authors = ["Astro <astro@spaceboyz.net>"]
+authors = ["M-Labs"]
 edition = "2018"
 [features]
 target_zc706 = []
-target_cora_z7_10 = []
+target_coraz7 = []
 target_ebaz4205 = []
 target_redpitaya = []
 target_kasli_soc = []
 ipv6 = [ "smoltcp/proto-ipv6" ]
 [dependencies]
 volatile-register = "0.2"
@ -18,9 +22,9 @@ void = { version = "1", default-features = false }
 log = "0.4"
 libregister = { path = "../libregister" }
 libcortex_a9 = { path = "../libcortex_a9" }
 libasync = { path = "../libasync" }
 [dependencies.smoltcp]
-version = "0.6"
+version = "0.7"
 # features = ["ethernet", "proto-ipv4", "socket-tcp", "log"]
 features = ["ethernet", "proto-ipv4", "socket-tcp"]
 default-features = false
--- a/libboard_zynq/src/clocks/mod.rs
+++ b/libboard_zynq/src/clocks/mod.rs
@ -1,3 +1,5 @@
 use core::unimplemented;
 use libregister::{RegisterR, RegisterRW};
 use super::slcr;
 pub use slcr::ArmPllSource;
@ -14,7 +16,7 @@ enum CpuClockMode {
 impl CpuClockMode {
    pub fn get() -> Self {
-        let regs = slcr::RegisterBlock::new();
+        let regs = slcr::RegisterBlock::slcr();
        if regs.clk_621_true.read().clk_621_true() {
            CpuClockMode::C621
        } else {
@ -59,7 +61,7 @@ impl Clocks {
    }
    pub fn cpu_6x4x(&self) -> u32 {
-        let slcr = slcr::RegisterBlock::new();
+        let slcr = slcr::RegisterBlock::slcr();
        let arm_clk_ctrl = slcr.arm_clk_ctrl.read();
        let pll = match arm_clk_ctrl.srcsel() {
            ArmPllSource::ArmPll => self.arm,
@ -92,7 +94,7 @@ impl Clocks {
    }
    pub fn uart_ref_clk(&self) -> u32 {
-        let regs = slcr::RegisterBlock::new();
+        let regs = slcr::RegisterBlock::slcr();
        let uart_clk_ctrl = regs.uart_clk_ctrl.read();
        let pll = match uart_clk_ctrl.srcsel() {
            slcr::PllSource::ArmPll =>
@ -101,12 +103,14 @@ impl Clocks {
                self.ddr,
            slcr::PllSource::IoPll =>
                self.io,
            slcr::PllSource::Emio =>
                unimplemented!(),
        };
        pll / u32::from(uart_clk_ctrl.divisor())
    }
    pub fn sdio_ref_clk(&self) -> u32 {
-        let regs = slcr::RegisterBlock::new();
+        let regs = slcr::RegisterBlock::slcr();
        let sdio_clk_ctrl = regs.sdio_clk_ctrl.read();
        let pll = match sdio_clk_ctrl.srcsel() {
            slcr::PllSource::ArmPll =>
@ -115,6 +119,8 @@ impl Clocks {
                self.ddr,
            slcr::PllSource::IoPll =>
                self.io,
            slcr::PllSource::Emio =>
                unimplemented!(),
        };
        pll / u32::from(sdio_clk_ctrl.divisor())
    }
--- a/libboard_zynq/src/clocks/source.rs
+++ b/libboard_zynq/src/clocks/source.rs
@ -4,8 +4,14 @@ use super::slcr;
 #[cfg(feature = "target_zc706")]
 pub const PS_CLK: u32 = 33_333_333;
-#[cfg(feature = "target_cora_z7_10")]
+#[cfg(feature = "target_coraz7")]
 pub const PS_CLK: u32 = 50_000_000;
 #[cfg(feature = "target_ebaz4205")]
 pub const PS_CLK: u32 = 33_333_333;
 #[cfg(feature = "target_redpitaya")]
 pub const PS_CLK: u32 = 33_333_333;
 #[cfg(feature = "target_kasli_soc")]
 pub const PS_CLK: u32 = 33_333_333;
 /// (pll_fdiv_max, (pll_cp, pll_res, lock_cnt))
 const PLL_FDIV_LOCK_PARAM: &[(u16, (u8, u8, u16))] = &[
@ -44,7 +50,7 @@ pub trait ClockSource {
    /// get configured frequency
    fn freq() -> u32 {
-        let mut slcr = slcr::RegisterBlock::new();
+        let mut slcr = slcr::RegisterBlock::slcr();
        let (pll_ctrl, _, _) = Self::pll_regs(&mut slcr);
        u32::from(pll_ctrl.read().pll_fdiv()) * PS_CLK
    }
@ -55,7 +61,7 @@ pub trait ClockSource {
    /// 25.10.4 PLLs
    fn setup(target_freq: u32) {
        let fdiv = (target_freq / PS_CLK).min(66) as u16;
-        let (pll_res, pll_cp, lock_cnt) = PLL_FDIV_LOCK_PARAM.iter()
+        let (pll_cp, pll_res, lock_cnt) = PLL_FDIV_LOCK_PARAM.iter()
            .filter(|(fdiv_max, _)| fdiv <= *fdiv_max)
            .nth(0)
            .expect("PLL_FDIV_LOCK_PARAM")
--- a/libboard_zynq/src/ddr/mod.rs
+++ b/libboard_zynq/src/ddr/mod.rs
@ -1,7 +1,9 @@
 use libregister::{RegisterR, RegisterW, RegisterRW};
 use log::{debug, info, error};
 use crate::{print, println};
-use super::slcr::{self, DdriobVrefSel};
+use super::slcr;
 #[cfg(feature = "target_zc706")]
 use super::slcr::DdriobVrefSel;
 use super::clocks::{Clocks, source::{DdrPll, ClockSource}};
 mod regs;
@ -10,26 +12,36 @@ mod regs;
 /// Micron MT41J256M8HX-15E: 667 MHz DDR3
 const DDR_FREQ: u32 = 666_666_666;
-#[cfg(feature = "target_cora_z7_10")]
+#[cfg(feature = "target_coraz7")]
 /// Micron MT41K256M16HA-125: 800 MHz DDR3L, max supported 533 MHz
 const DDR_FREQ: u32 = 525_000_000;
-/// MT41K256M16HA-125
+#[cfg(feature = "target_ebaz4205")]
-const DCI_FREQ: u32 = 10_000_000;
+/// EtronTech Memory EM6GD16EWKG-12H: 800 MHz DDR3 at 533 MHz
 const DDR_FREQ: u32 = 533_333_333;
 #[cfg(feature = "target_redpitaya")]
 /// Alliance Memory AS4C256M16D3B: 800 MHz DDR3 at 533 MHz
 const DDR_FREQ: u32 = 533_333_333;
 #[cfg(feature = "target_kasli_soc")]
 /// MT41K256M16HA-125:E: 800 MHz DDR3L at 533 MHz
 const DDR_FREQ: u32 = 533_333_333;
 const DCI_MAX_FREQ: u32 = 10_000_000;
 pub struct DdrRam {
    regs: &'static mut regs::RegisterBlock,
 }
 impl DdrRam {
-    pub fn new() -> Self {
+    pub fn ddrram() -> Self {
        let clocks = Self::clock_setup();
        Self::calibrate_iob_impedance(&clocks);
        Self::configure_iob();
-
+        Self::calibrate_iob_impedance(&clocks);
-        let regs = unsafe { regs::RegisterBlock::new() };
+        let regs = regs::RegisterBlock::ddrc();
        let mut ddr = DdrRam { regs };
-        ddr.reset_ddrc();
+        ddr.reset_ddrc(|ddr| ddr.configure());
        ddr
    }
@ -55,14 +67,35 @@ impl DdrRam {
        clocks
    }
    fn calculate_dci_divisors(clocks: &Clocks) -> (u8, u8) {
        let target = (DCI_MAX_FREQ - 1 + clocks.ddr) / DCI_MAX_FREQ;
        let mut best = None;
        let mut best_error = 0;
        for divisor0 in 1..63 {
            for divisor1 in 1..63 {
                let current = (divisor0 as u32) * (divisor1 as u32);
                let error = if current > target {
                    current - target
                } else {
                    target - current
                };
                if best.is_none() || best_error > error {
                    best = Some((divisor0, divisor1));
                    best_error = error;
                }
            }
        }
        best.unwrap()
    }
    /// Zynq-7000 AP SoC Technical Reference Manual:
    /// 10.6.2 DDR IOB Impedance Calibration
    fn calibrate_iob_impedance(clocks: &Clocks) {
-        let divisor0 = ((DCI_FREQ - 1 + clocks.ddr) / DCI_FREQ)
+        let (divisor0, divisor1) = Self::calculate_dci_divisors(clocks);
-            .max(1).min(63) as u8;
+        debug!("DDR DCI clock: {} Hz (divisors={}*{})",
-        let divisor1 = ((DCI_FREQ - 1 + clocks.ddr) / DCI_FREQ / u32::from(divisor0))
+               clocks.ddr / u32::from(divisor0) / u32::from(divisor1),
-            .max(1).min(63) as u8;
+               divisor0, divisor1);
        debug!("DDR DCI clock: {} Hz", clocks.ddr / u32::from(divisor0) / u32::from(divisor1));
        slcr::RegisterBlock::unlocked(|slcr| {
            // Step 1.
@ -118,13 +151,23 @@ impl DdrRam {
                .output_en(slcr::DdriobOutputEn::Obuf);
            #[cfg(feature = "target_zc706")]
            let data1_config = data0_config.clone();
-            #[cfg(feature = "target_cora_z7_10")]
+            #[cfg(any(
                feature = "target_coraz7",
                feature = "target_ebaz4205",
                feature = "target_redpitaya",
                feature = "target_kasli_soc",
            ))]
            let data0_config = slcr::DdriobConfig::zeroed()
                .inp_type(slcr::DdriobInputType::VrefDifferential)
                .term_en(true)
                .dci_type(slcr::DdriobDciType::Termination)
                .output_en(slcr::DdriobOutputEn::Obuf);
-            #[cfg(feature = "target_cora_z7_10")]
+            #[cfg(any(
                feature = "target_coraz7",
                feature = "target_ebaz4205",
                feature = "target_redpitaya",
                feature = "target_kasli_soc",
            ))]
            let data1_config = slcr::DdriobConfig::zeroed()
                .pullup_en(true);
            slcr.ddriob_data0.write(data0_config);
@ -138,16 +181,25 @@ impl DdrRam {
                .output_en(slcr::DdriobOutputEn::Obuf);
            #[cfg(feature = "target_zc706")]
            let diff1_config = diff0_config.clone();
-            #[cfg(feature = "target_cora_z7_10")]
+            #[cfg(any(
                feature = "target_coraz7",
                feature = "target_ebaz4205",
                feature = "target_redpitaya",
                feature = "target_kasli_soc",
            ))]
            let diff0_config = slcr::DdriobConfig::zeroed()
                .inp_type(slcr::DdriobInputType::Differential)
                .term_en(true)
                .dci_type(slcr::DdriobDciType::Termination)
                .output_en(slcr::DdriobOutputEn::Obuf);
-            #[cfg(feature = "target_cora_z7_10")]
+            #[cfg(any(
                feature = "target_coraz7",
                feature = "target_ebaz4205",
                feature = "target_redpitaya",
                feature = "target_kasli_soc",
            ))]
            let diff1_config = slcr::DdriobConfig::zeroed()
                .pullup_en(true);
            slcr.ddriob_diff0.write(diff0_config);
            slcr.ddriob_diff1.write(diff1_config);
@ -164,12 +216,17 @@ impl DdrRam {
                slcr.ddriob_drive_slew_clock.write(0x00F9861C);
            }
-            // Enable external V[REF]
+            #[cfg(any(
-            #[cfg(feature = "target_cora_z7_10")]
+                feature = "target_coraz7",
                feature = "target_ebaz4205",
                feature = "target_redpitaya",
                feature = "target_kasli_soc",
            ))]
            slcr.ddriob_ddr_ctrl.modify(|_, w| w
                    .vref_int_en(false)
                    .vref_ext_en_lower(true)
                    .vref_ext_en_upper(false)
                    .refio_en(true)
            );
            #[cfg(feature = "target_zc706")]
            slcr.ddriob_ddr_ctrl.modify(|_, w| w
@ -181,8 +238,200 @@ impl DdrRam {
        });
    }
    fn configure(&mut self) {
        #[cfg(any(feature = "target_coraz7", feature = "target_kasli_soc"))]
        self.regs.dram_param0.write(
            regs::DramParam0::zeroed()
                .t_rc(0x1a)
                .t_rfc_min(0x9e)
                .post_selfref_gap_x32(0x10)
        );
        #[cfg(feature = "target_ebaz4205")]
        self.regs.dram_param0.write(
            regs::DramParam0::zeroed()
                .t_rc(0x1a)
                .t_rfc_min(0x56)
                .post_selfref_gap_x32(0x10)
        );
        #[cfg(feature = "target_redpitaya")]
        self.regs.dram_param0.write(
            regs::DramParam0::zeroed()
                .t_rc(0x1b)
                .t_rfc_min(0xa0)
                .post_selfref_gap_x32(0x10)
        );
        #[cfg(feature = "target_zc706")]
        self.regs.dram_param0.write(
            regs::DramParam0::zeroed()
                .t_rc(0x1b)
                .t_rfc_min(0x56)
                .post_selfref_gap_x32(0x10)
        );
        #[cfg(feature = "target_ebaz4205")]
        self.regs.dram_param1.modify(
            |_, w| w
                .t_faw(0x16)
                .t_ras_min(0x13)
        );
        #[cfg(feature = "target_redpitaya")]
        self.regs.dram_param1.modify(
            |_, w| w
                .wr2pre(0x12)
                .powerdown_to_x32(6)
                .t_faw(0x16)
                .t_ras_max(0x24)
                .t_ras_min(0x13)
                .t_cke(4)
        );
        self.regs.dram_param2.write(
            regs::DramParam2::zeroed()
                .write_latency(0x5)
                .rd2wr(0x7)
                .wr2rd(0xe)
                .t_xp(0x4)
                .pad_pd(0x0)
                .rd2pre(0x4)
                .t_rcd(0x7)
        );
        #[cfg(feature = "target_ebaz4205")]
        self.regs.dram_param3.modify(
            |_, w| w
                .t_rp(7)
        );
        #[cfg(feature = "target_redpitaya")]
        self.regs.dram_param3.modify(
            |_, w| w
                .t_ccd(4)
                .t_rrd(6)
                .refresh_margin(2)
                .t_rp(7)
                .refresh_to_x32(8)
                .mobile(false)
                .dfi_dram_clk_disable(false)
                .read_latency(7)
                .mode_ddr1_ddr2(true)
                .dis_pad_pd(false)
        );
        self.regs.dram_emr_mr.write(
            regs::DramEmrMr::zeroed()
                .mr(0x930)
                .emr(0x4)
        );
        #[cfg(any(
            feature = "target_coraz7",
            feature = "target_ebaz4205",
            feature = "target_redpitaya",
            feature = "target_kasli_soc",
        ))]
        self.regs.phy_configs[2].modify(
            |_, w| w.data_slice_in_use(false)
        );
        #[cfg(any(
            feature = "target_coraz7",
            feature = "target_ebaz4205",
            feature = "target_redpitaya",
            feature = "target_kasli_soc",
        ))]
        self.regs.phy_configs[3].modify(
            |_, w| w.data_slice_in_use(false)
        );
        self.regs.phy_cmd_timeout_rddata_cpt.modify(
            |_, w| w
                .rd_cmd_to_data(0x0)
                .wr_cmd_to_data(0x0)
                .we_to_re_delay(0x8)
                .rdc_fifo_rst_disable(false)
                .use_fixed_re(true)
                .rdc_fifo_rst_err_cnt_clr(false)
                .dis_phy_ctrl_rstn(false)
                .clk_stall_level(false)
                .gatelvl_num_of_dq0(0x7)
                .wrlvl_num_of_dq0(0x7)
        );
        self.regs.reg_2c.write(
            regs::Reg2C::zeroed()
                .wrlvl_max_x1024(0xfff)
                .rdlvl_max_x1024(0xfff)
                .twrlvl_max_error(false)
                .trdlvl_max_error(false)
                .dfi_wr_level_en(true)
                .dfi_rd_dqs_gate_level(true)
                .dfi_rd_data_eye_train(true)
        );
        self.regs.dfi_timing.write(
            regs::DfiTiming::zeroed()
                .rddata_en(0x6)
                .ctrlup_min(0x3)
                .ctrlup_max(0x40)
        );
        #[cfg(feature = "target_zc706")]
        self.regs.phy_init_ratios[3].write(
            regs::PhyInitRatio::zeroed()
                .wrlvl_init_ratio(0x21)
                .gatelvl_init_ratio(0xee)
        );
        #[cfg(any(
            feature = "target_coraz7",
            feature = "target_ebaz4205",
            feature = "target_kasli_soc"),
        )]
        self.regs.reg_64.modify(
            |_, w| w
                .phy_ctrl_slave_ratio(0x100)
                .phy_invert_clkout(true)
        );
        #[cfg(feature = "target_redpitaya")]
        self.regs.reg_64.modify(
            |_, w| w
                .phy_bl2(false)
                .phy_invert_clkout(true)
                .phy_sel_logic(false)
                .phy_ctrl_slave_ratio(0x100)
                .phy_ctrl_slave_force(false)
                .phy_ctrl_slave_delay(0)
                .phy_lpddr(false)
                .phy_cmd_latency(false)
        );
        self.regs.reg_65.write(
            regs::Reg65::zeroed()
                .wr_rl_delay(0x2)
                .rd_rl_delay(0x4)
                .dll_lock_diff(0xf)
                .use_wr_level(true)
                .use_rd_dqs_gate_level(true)
                .use_rd_data_eye_level(true)
                .dis_calib_rst(false)
                .ctrl_slave_delay(0x0)
        );
    }
    /// Reset DDR controller
-    fn reset_ddrc(&mut self) {
+    fn reset_ddrc<F: FnMut(&mut Self)>(&mut self, mut f: F) {
        #[cfg(feature = "target_zc706")]
        let width = regs::DataBusWidth::Width32bit;
        #[cfg(any(
            feature = "target_coraz7",
            feature = "target_ebaz4205",
            feature = "target_redpitaya",
            feature = "target_kasli_soc",
        ))]
        let width = regs::DataBusWidth::Width16bit;
        self.regs.ddrc_ctrl.modify(|_, w| w
            .soft_rstb(false)
            .powerdown_en(false)
            .data_bus_width(width)
        );
        f(self);
        #[cfg(feature = "target_zc706")]
        unsafe {
            // row/column address bits
@ -190,16 +439,19 @@ impl DdrRam {
            self.regs.dram_addr_map_col.write(0xFFF00000);
            self.regs.dram_addr_map_row.write(0x0F666666);
        }
        #[cfg(any(
            feature = "target_coraz7",
            feature = "target_ebaz4205",
            feature = "target_redpitaya",
            feature = "target_kasli_soc",
        ))]
        unsafe {
            // row/column address bits
            self.regs.dram_addr_map_bank.write(0x00000666);
            self.regs.dram_addr_map_col.write(0xFFFF0000);
            self.regs.dram_addr_map_row.write(0x0F555555);
        }
        #[cfg(feature = "target_zc706")]
        let width = regs::DataBusWidth::Width32bit;
        #[cfg(feature = "target_cora_z7_10")]
        let width = regs::DataBusWidth::Width16bit;
        self.regs.ddrc_ctrl.modify(|_, w| w
            .soft_rstb(false)
            .powerdown_en(false)
            .data_bus_width(width)
        );
        self.regs.ddrc_ctrl.modify(|_, w| w
            .soft_rstb(true)
            .powerdown_en(false)
@ -210,7 +462,7 @@ impl DdrRam {
    }
    pub fn status(&self) -> regs::ControllerStatus {
-        self.regs.mode_sts_reg.read().operating_mode()
+        self.regs.mode_sts.read().operating_mode()
    }
    pub fn ptr<T>(&mut self) -> *mut T {
@ -220,10 +472,18 @@ impl DdrRam {
    /// actually there's 1 MB more but starting at 0x0000_0000
    /// overlaps with OCM.
    pub fn size(&self) -> usize {
        // DDR range ends at 0x3FFF_FFFF in the default SCU address
        // filtering address map
        #[cfg(feature = "target_zc706")]
        let megabytes = 1023;
-        #[cfg(feature = "target_cora_z7_10")]
+        #[cfg(any(
-        let megabytes = 511;
+            feature = "target_coraz7",
            feature = "target_redpitaya",
            feature = "target_kasli_soc",
        ))]
        let megabytes = 512;
        #[cfg(feature = "target_ebaz4205")]
        let megabytes = 256;
        megabytes * 1024 * 1024
    }
@ -239,7 +499,7 @@ impl DdrRam {
            for megabyte in 0..slice.len() / (1024 * 1024) {
                let start = megabyte * 1024 * 1024 / 4;
-                let end = ((megabyte + 1) * 1024 * 1024 / 4);
+                let end = (megabyte + 1) * 1024 * 1024 / 4;
                for b in slice[start..end].iter_mut() {
                    expected.map(|expected| {
                        let read: u32 = *b;
--- a/libboard_zynq/src/ddr/regs.rs
+++ b/libboard_zynq/src/ddr/regs.rs
@ -1,6 +1,6 @@
 use volatile_register::{RO, RW};
-use libregister::{register, register_bit, register_bits_typed};
+use libregister::{register, register_at, register_bit, register_bits, register_bits_typed};
 #[allow(unused)]
 #[derive(Clone, Copy)]
@ -29,70 +29,64 @@ pub enum ControllerStatus {
 pub struct RegisterBlock {
    pub ddrc_ctrl: DdrcCtrl,
    pub two_rank_cfg: RW<u32>,
-    pub hpr_reg: RW<u32>,
+    pub hpr: RW<u32>,
-    pub lpr_reg: RW<u32>,
+    pub lpr: RW<u32>,
-    pub wr_reg: RW<u32>,
+    pub wr: RW<u32>,
-    pub dram_param_reg0: RW<u32>,
+    pub dram_param0: DramParam0,
-    pub dram_param_reg1: RW<u32>,
+    pub dram_param1: DramParam1,
-    pub dram_param_reg2: RW<u32>,
+    pub dram_param2: DramParam2,
-    pub dram_param_reg3: RW<u32>,
+    pub dram_param3: DramParam3,
-    pub dram_param_reg4: RW<u32>,
+    pub dram_param4: RW<u32>,
    pub dram_init_param: RW<u32>,
-    pub dram_emr_reg: RW<u32>,
+    pub dram_emr: RW<u32>,
-    pub dram_emr_mr_reg: RW<u32>,
+    pub dram_emr_mr: DramEmrMr,
-    pub dram_burst8_rdwr: RW<u32>,
+    pub dram_burst8_rdwr: Burst8Rdwr,
    pub dram_disable_dq: RW<u32>,
    pub dram_addr_map_bank: RW<u32>,
    pub dram_addr_map_col: RW<u32>,
    pub dram_addr_map_row: RW<u32>,
-    pub dram_odt_reg: RW<u32>,
+    pub dram_odt: RW<u32>,
-    pub phy_dbg_reg: RW<u32>,
+    pub phy_dbg: RW<u32>,
-    pub phy_cmd_timeout_rddata_cpt: RW<u32>,
+    pub phy_cmd_timeout_rddata_cpt: PhyCmdTimeoutRddataCpt,
-    pub mode_sts_reg: ModeStsReg,
+    pub mode_sts: ModeStsReg,
    pub dll_calib: RW<u32>,
    pub odt_delay_hold: RW<u32>,
-    pub ctrl_reg1: RW<u32>,
+    pub ctrl1: RW<u32>,
-    pub ctrl_reg2: RW<u32>,
+    pub ctrl2: RW<u32>,
-    pub ctrl_reg3: RW<u32>,
+    pub ctrl3: RW<u32>,
-    pub ctrl_reg4: RW<u32>,
+    pub ctrl4: RW<u32>,
    _unused0: [RO<u32>; 2],
-    pub ctrl_reg5: RW<u32>,
+    pub ctrl5: RW<u32>,
-    pub ctrl_reg6: RW<u32>,
+    pub ctrl6: RW<u32>,
    _unused1: [RO<u32>; 8],
    pub che_refresh_timer01: RW<u32>,
-    pub che_t_zq: RW<u32>,
+    pub che_t_zq: CheTZq,
-    pub che_t_zq_short_interval_reg: RW<u32>,
+    pub che_t_zq_short_interval: RW<u32>,
-    pub deep_pwrdwn_reg: RW<u32>,
+    pub deep_pwrdwn: RW<u32>,
-    pub reg_2c: RW<u32>,
+    pub reg_2c: Reg2C,
    pub reg_2d: RW<u32>,
-    pub dfi_timing: RW<u32>,
+    pub dfi_timing: DfiTiming,
    _unused2: [RO<u32>; 2],
-    pub che_ecc_control_reg_offset: RW<u32>,
+    pub che_ecc_control_offset: RW<u32>,
-    pub che_corr_ecc_log_reg_offset: RW<u32>,
+    pub che_corr_ecc_log_offset: RW<u32>,
-    pub che_corr_ecc_addr_reg_offset: RW<u32>,
+    pub che_corr_ecc_addr_offset: RW<u32>,
-    pub che_corr_ecc_data_31_0_reg_offset: RW<u32>,
+    pub che_corr_ecc_data_31_0_offset: RW<u32>,
-    pub che_corr_ecc_data_63_32_reg_offset: RW<u32>,
+    pub che_corr_ecc_data_63_32_offset: RW<u32>,
-    pub che_corr_ecc_data_71_64_reg_offset: RW<u32>,
+    pub che_corr_ecc_data_71_64_offset: RW<u32>,
-    pub che_uncorr_ecc_log_reg_offset: RW<u32>,
+    pub che_uncorr_ecc_log_offset: RW<u32>,
-    pub che_uncorr_ecc_addr_reg_offset: RW<u32>,
+    pub che_uncorr_ecc_addr_offset: RW<u32>,
-    pub che_uncorr_ecc_data_31_0_reg_offset: RW<u32>,
+    pub che_uncorr_ecc_data_31_0_offset: RW<u32>,
-    pub che_uncorr_ecc_data_63_32_reg_offset: RW<u32>,
+    pub che_uncorr_ecc_data_63_32_offset: RW<u32>,
-    pub che_uncorr_ecc_data_71_64_reg_offset: RW<u32>,
+    pub che_uncorr_ecc_data_71_64_offset: RW<u32>,
-    pub che_ecc_stats_reg_offset: RW<u32>,
+    pub che_ecc_stats_offset: RW<u32>,
    pub ecc_scrub: RW<u32>,
-    pub che_ecc_corr_bit_mask_31_0_reg_offset: RW<u32>,
+    pub che_ecc_corr_bit_mask_31_0_offset: RW<u32>,
-    pub che_ecc_corr_bit_mask_63_32_reg_offset: RW<u32>,
+    pub che_ecc_corr_bit_mask_63_32_offset: RW<u32>,
    _unused3: [RO<u32>; 5],
    pub phy_rcvr_enable: RW<u32>,
-    pub phy_config0: RW<u32>,
+    pub phy_configs: [PhyConfig; 4],
    pub phy_config1: RW<u32>,
    pub phy_config2: RW<u32>,
    pub phy_config3: RW<u32>,
    _unused4: RO<u32>,
-    pub phy_init_ratio0: RW<u32>,
+    pub phy_init_ratios: [PhyInitRatio; 4],
    pub phy_init_ratio1: RW<u32>,
    pub phy_init_ratio2: RW<u32>,
    pub phy_init_ratio3: RW<u32>,
    _unused5: RO<u32>,
    pub phy_rd_dqs_cfg0: RW<u32>,
    pub phy_rd_dqs_cfg1: RW<u32>,
@ -114,8 +108,8 @@ pub struct RegisterBlock {
    pub wr_data_slv2: RW<u32>,
    pub wr_data_slv3: RW<u32>,
    _unused9: RO<u32>,
-    pub reg_64: RW<u32>,
+    pub reg_64: Reg64,
-    pub reg_65: RW<u32>,
+    pub reg_65: Reg65,
    _unused10: [RO<u32>; 3],
    pub reg69_6a0: RW<u32>,
    pub reg69_6a1: RW<u32>,
@ -134,18 +128,12 @@ pub struct RegisterBlock {
    _unused13: RO<u32>,
    pub dll_lock_sts: RW<u32>,
    pub phy_ctrl_sts: RW<u32>,
-    pub phy_ctrl_sts_reg2: RW<u32>,
+    pub phy_ctrl_sts2: RW<u32>,
    _unused14: [RO<u32>; 5],
    pub axi_id: RW<u32>,
    pub page_mask: RW<u32>,
-    pub axi_priority_wr_port0: RW<u32>,
+    pub axi_priority_wr_ports: [RW<u32>; 4],
-    pub axi_priority_wr_port1: RW<u32>,
+    pub axi_priority_rd_ports: [AxiPriorityRd; 4],
    pub axi_priority_wr_port2: RW<u32>,
    pub axi_priority_wr_port3: RW<u32>,
    pub axi_priority_rd_port0: RW<u32>,
    pub axi_priority_rd_port1: RW<u32>,
    pub axi_priority_rd_port2: RW<u32>,
    pub axi_priority_rd_port3: RW<u32>,
    _unused15: [RO<u32>; 27],
    pub excl_access_cfg0: RW<u32>,
    pub excl_access_cfg1: RW<u32>,
@ -158,11 +146,7 @@ pub struct RegisterBlock {
    pub lpddr_ctrl3: RW<u32>,
 }
-impl RegisterBlock {
+register_at!(RegisterBlock, 0xF8006000, ddrc);
    pub unsafe fn new() -> &'static mut Self {
        &mut *(0xF8006000 as *mut _)
    }
 }
 register!(ddrc_ctrl, DdrcCtrl, RW, u32);
 register_bit!(ddrc_ctrl,
@ -172,8 +156,124 @@ register_bit!(ddrc_ctrl, powerdown_en, 1);
 register_bits_typed!(ddrc_ctrl, data_bus_width, u8, DataBusWidth, 2, 3);
 // (ddrc_ctrl) ...
 register!(dram_param0, DramParam0, RW, u32);
 register_bits!(dram_param0, t_rc, u8, 0, 5);
 register_bits!(dram_param0, t_rfc_min, u8, 6, 13);
 register_bits!(dram_param0, post_selfref_gap_x32, u8, 14, 20);
 register!(dram_param1, DramParam1, RW, u32);
 register_bits!(dram_param1, wr2pre, u8, 0, 4);
 register_bits!(dram_param1, powerdown_to_x32, u8, 5, 9);
 register_bits!(dram_param1, t_faw, u8, 10, 15);
 register_bits!(dram_param1, t_ras_max, u8, 16, 21);
 register_bits!(dram_param1, t_ras_min, u8, 22, 26);
 register_bits!(dram_param1, t_cke, u8, 28, 31);
 register!(dram_param2, DramParam2, RW, u32);
 register_bits!(dram_param2, write_latency, u8, 0, 4);
 register_bits!(dram_param2, rd2wr, u8, 5, 9);
 register_bits!(dram_param2, wr2rd, u8, 10, 14);
 register_bits!(dram_param2, t_xp, u8, 15, 19);
 register_bits!(dram_param2, pad_pd, u8, 20, 22);
 register_bits!(dram_param2, rd2pre, u8, 23, 27);
 register_bits!(dram_param2, t_rcd, u8, 28, 31);
 register!(dram_param3, DramParam3, RW, u32);
 register_bits!(dram_param3, t_ccd, u8, 2, 4);
 register_bits!(dram_param3, t_rrd, u8, 5, 7);
 register_bits!(dram_param3, refresh_margin, u8, 8, 11);
 register_bits!(dram_param3, t_rp, u8, 12, 15);
 register_bits!(dram_param3, refresh_to_x32, u8, 16, 20);
 register_bit!(dram_param3, sdram, 21);
 register_bit!(dram_param3, mobile, 22);
 register_bit!(dram_param3, dfi_dram_clk_disable, 23);
 register_bits!(dram_param3, read_latency, u8, 24, 28);
 register_bit!(dram_param3, mode_ddr1_ddr2, 29);
 register_bit!(dram_param3, dis_pad_pd, 30);
 register!(dram_emr_mr, DramEmrMr, RW, u32);
 register_bits!(dram_emr_mr, mr, u16, 0, 15);
 register_bits!(dram_emr_mr, emr, u16, 16, 31);
 register!(burst8_rdwr, Burst8Rdwr, RW, u32);
 register_bits!(burst8_rdwr, burst_rdwr, u8, 0, 3);
 register_bits!(burst8_rdwr, pre_cke_x1024, u16, 4, 13);
 register_bits!(burst8_rdwr, post_cke_x1024, u16, 16, 25);
 register_bit!(burst8_rdwr, burstchop, 28);
 register!(phy_cmd_timeout_rddata_cpt, PhyCmdTimeoutRddataCpt, RW, u32);
 register_bits!(phy_cmd_timeout_rddata_cpt, rd_cmd_to_data, u8, 0, 3);
 register_bits!(phy_cmd_timeout_rddata_cpt, wr_cmd_to_data, u8, 4, 7);
 register_bits!(phy_cmd_timeout_rddata_cpt, we_to_re_delay, u8, 8, 11);
 register_bit!(phy_cmd_timeout_rddata_cpt, rdc_fifo_rst_disable, 15);
 register_bit!(phy_cmd_timeout_rddata_cpt, use_fixed_re, 16);
 register_bit!(phy_cmd_timeout_rddata_cpt, rdc_fifo_rst_err_cnt_clr, 17);
 register_bit!(phy_cmd_timeout_rddata_cpt, dis_phy_ctrl_rstn, 18);
 register_bit!(phy_cmd_timeout_rddata_cpt, clk_stall_level, 19);
 register_bits!(phy_cmd_timeout_rddata_cpt, gatelvl_num_of_dq0, u8, 24, 27);
 register_bits!(phy_cmd_timeout_rddata_cpt, wrlvl_num_of_dq0, u8, 28, 31);
 register!(che_t_zq, CheTZq, RW, u32);
 register_bit!(che_t_zq, dis_auto_zq, 0);
 register_bit!(che_t_zq, ddr3, 1);
 register_bits!(che_t_zq, t_mod, u8, 2, 11);
 register_bits!(che_t_zq, t_zq_long_nop, u16, 12, 21);
 register_bits!(che_t_zq, t_zq_short_nop, u16, 22, 31);
 register!(reg_2c, Reg2C, RW, u32);
 register_bits!(reg_2c, wrlvl_max_x1024, u16, 0, 11);
 register_bits!(reg_2c, rdlvl_max_x1024, u16, 12, 23);
 register_bit!(reg_2c, twrlvl_max_error, 24);
 register_bit!(reg_2c, trdlvl_max_error, 25);
 register_bit!(reg_2c, dfi_wr_level_en, 26);
 register_bit!(reg_2c, dfi_rd_dqs_gate_level, 27);
 register_bit!(reg_2c, dfi_rd_data_eye_train, 28);
 register!(dfi_timing, DfiTiming, RW, u32);
 register_bits!(dfi_timing, rddata_en, u8, 0, 4);
 register_bits!(dfi_timing, ctrlup_min, u16, 5, 14);
 register_bits!(dfi_timing, ctrlup_max, u16, 15, 24);
 register!(phy_config, PhyConfig, RW, u32);
 register_bit!(phy_config, data_slice_in_use, 0);
 register_bit!(phy_config, rdlvl_inc_mode, 1);
 register_bit!(phy_config, gatelvl_inc_mode, 2);
 register_bit!(phy_config, wrlvl_inc_mode, 3);
 register_bits!(phy_config, dq_offset, u8, 24, 30);
 register!(phy_init_ratio, PhyInitRatio, RW, u32);
 register_bits!(phy_init_ratio, wrlvl_init_ratio, u16, 0, 9);
 register_bits!(phy_init_ratio, gatelvl_init_ratio, u16, 10, 19);
 register!(reg_64, Reg64, RW, u32);
 register_bit!(reg_64, phy_bl2, 1);
 register_bit!(reg_64, phy_invert_clkout, 7);
 register_bit!(reg_64, phy_sel_logic, 9);
 register_bits!(reg_64, phy_ctrl_slave_ratio, u16, 10, 19);
 register_bit!(reg_64, phy_ctrl_slave_force, 20);
 register_bits!(reg_64, phy_ctrl_slave_delay, u8, 21, 27);
 register_bit!(reg_64, phy_lpddr, 29);
 register_bit!(reg_64, phy_cmd_latency, 30);
 register!(reg_65, Reg65, RW, u32);
 register_bits!(reg_65, wr_rl_delay, u8, 0, 4);
 register_bits!(reg_65, rd_rl_delay, u8, 5, 9);
 register_bits!(reg_65, dll_lock_diff, u8, 10, 13);
 register_bit!(reg_65, use_wr_level, 14);
 register_bit!(reg_65, use_rd_dqs_gate_level, 15);
 register_bit!(reg_65, use_rd_data_eye_level, 16);
 register_bit!(reg_65, dis_calib_rst, 17);
 register_bits!(reg_65, ctrl_slave_delay, u8, 18, 19);
 // Controller operation mode status
 register!(mode_sts_reg,
          ModeStsReg, RO, u32);
 register_bits_typed!(mode_sts_reg, operating_mode, u8, ControllerStatus, 0, 2);
 // (mode_sts_reg) ...
 register!(axi_priority_rd, AxiPriorityRd, RW, u32);
 register_bits!(axi_priority_rd, arb_pri_rd_portn, u16, 0, 9);
 register_bit!(axi_priority_rd, arb_disable_aging_rd_portn, 16);
 register_bit!(axi_priority_rd, arb_disable_urgent_rd_portn, 17);
 register_bit!(axi_priority_rd, arb_disable_page_match_rd_portn, 18);
 register_bit!(axi_priority_rd, arb_set_hpr_rd_portn, 19);
--- a/libboard_zynq/src/devc/mod.rs
+++ b/libboard_zynq/src/devc/mod.rs
@ -1,4 +1,3 @@
 use super::clocks::Clocks;
 use super::time::Milliseconds;
 use crate::slcr;
 use embedded_hal::timer::CountDown;
@ -11,7 +10,7 @@ mod regs;
 pub struct DevC {
    regs: &'static mut regs::RegisterBlock,
    enabled: bool,
-    count_down: super::timer::global::CountDown,
+    count_down: super::timer::global::CountDown<Milliseconds>,
    timeout_ms: Milliseconds,
 }
--- a/libboard_zynq/src/dmac/mod.rs
+++ b/libboard_zynq/src/dmac/mod.rs
@ -1,3 +0,0 @@
 //! PrimeCell DMA Controller (PL330)
 mod regs;
--- a/libboard_zynq/src/dmac/regs.rs
+++ b/libboard_zynq/src/dmac/regs.rs
@ -1,386 +0,0 @@
 use libregister::{
    register, register_at,
    register_bit, register_bits, register_bits_typed,
 };
 #[allow(unused)]
 #[repr(C)]
 pub struct RegisterBlock {
    pub ds: Ds,
    pub dpc: DPc,
    pub inten: Inten,
    pub es: Es,
    pub intstatus: IntStatus,
    pub intclr: IntClr,
    pub fsm: Fsm,
    pub fsc: Fsc,
    pub ftm: Ftm,
    pub ftc: [Ftc; 8],
    pub cs0: Cs,
    pub cpc0: Cpc,
    pub cs1: Cs,
    pub cpc1: Cpc,
    pub cs2: Cs,
    pub cpc2: Cpc,
    pub cs3: Cs,
    pub cpc3: Cpc,
    pub cs4: Cs,
    pub cpc4: Cpc,
    pub cs5: Cs,
    pub cpc5: Cpc,
    pub cs6: Cs,
    pub cpc6: Cpc,
    pub cs7: Cs,
    pub cpc7: Cpc,
    pub sa0: Sa,
    pub da0: Da,
    pub cc0: Cc,
    pub lc0_0: Lc,
    pub lc0_1: Lc,
    pub sa1: Sa,
    pub da1: Da,
    pub cc1: Cc,
    pub lc1_0: Lc,
    pub lc1_1: Lc,
    pub sa2: Sa,
    pub da2: Da,
    pub cc2: Cc,
    pub lc2_0: Lc,
    pub lc2_1: Lc,
    pub sa3: Sa,
    pub da3: Da,
    pub cc3: Cc,
    pub lc3_0: Lc,
    pub lc3_1: Lc,
    pub sa4: Sa,
    pub da4: Da,
    pub cc4: Cc,
    pub lc4_0: Lc,
    pub lc4_1: Lc,
    pub sa5: Sa,
    pub da5: Da,
    pub cc5: Cc,
    pub lc5_0: Lc,
    pub lc5_1: Lc,
    pub sa6: Sa,
    pub da6: Da,
    pub cc6: Cc,
    pub lc6_0: Lc,
    pub lc6_1: Lc,
    pub sa7: Sa,
    pub da7: Da,
    pub cc7: Cc,
    pub lc7_0: Lc,
    pub lc7_1: Lc,
    pub dbgstatus: DbgStatus,
    pub dbgcmd: DbgCmd,
    pub dbginst0: DbgInst0,
    pub dbginst1: DbgInst1,
    pub cr0: Cr0,
    pub cr1: Cr1,
    pub cr2: Cr2,
    pub cr3: Cr3,
    pub cr4: Cr4,
    pub crdn: Crdn,
    pub wd: Wd,
    pub periph_id_0: PeriphId0,
    pub periph_id_1: PeriphId1,
    pub periph_id_2: PeriphId2,
    pub periph_id_3: PeriphId3,
    pub pcell_id_0: PCellId0,
    pub pcell_id_1: PCellId1,
    pub pcell_id_2: PCellId2,
    pub pcell_id_3: PCellId3,
 }
 register_at!(RegisterBlock, 0xF8004000, dmac0_ns);
 register_at!(RegisterBlock, 0xF8003000, dmac0_s);
 impl RegisterBlock {
    pub fn channel_regs(&mut self, channel: usize) -> Option<ChannelRegisters>
    {
        match channel {
            0 => Some(ChannelRegisters {
                ftc: &mut self.ftc[0],
                cs: &mut self.cs0,
                cpc: &mut self.cpc0,
                sa: &mut self.sa0,
                da: &mut self.da0,
                cc: &mut self.cc0,
                lc: [&mut self.lc0_0, &mut self.lc0_1],
            }),
            1 => Some(ChannelRegisters {
                ftc: &mut self.ftc[1],
                cs: &mut self.cs1,
                cpc: &mut self.cpc1,
                sa: &mut self.sa1,
                da: &mut self.da1,
                cc: &mut self.cc1,
                lc: [&mut self.lc1_0, &mut self.lc1_1],
            }),
            2 => Some(ChannelRegisters {
                ftc: &mut self.ftc[2],
                cs: &mut self.cs2,
                cpc: &mut self.cpc2,
                sa: &mut self.sa2,
                da: &mut self.da2,
                cc: &mut self.cc2,
                lc: [&mut self.lc2_0, &mut self.lc2_1],
            }),
            3 => Some(ChannelRegisters {
                ftc: &mut self.ftc[3],
                cs: &mut self.cs3,
                cpc: &mut self.cpc3,
                sa: &mut self.sa3,
                da: &mut self.da3,
                cc: &mut self.cc3,
                lc: [&mut self.lc3_0, &mut self.lc3_1],
            }),
            4 => Some(ChannelRegisters {
                ftc: &mut self.ftc[4],
                cs: &mut self.cs4,
                cpc: &mut self.cpc4,
                sa: &mut self.sa4,
                da: &mut self.da4,
                cc: &mut self.cc4,
                lc: [&mut self.lc4_0, &mut self.lc4_1],
            }),
            5 => Some(ChannelRegisters {
                ftc: &mut self.ftc[5],
                cs: &mut self.cs5,
                cpc: &mut self.cpc5,
                sa: &mut self.sa5,
                da: &mut self.da5,
                cc: &mut self.cc5,
                lc: [&mut self.lc5_0, &mut self.lc5_1],
            }),
            6 => Some(ChannelRegisters {
                ftc: &mut self.ftc[6],
                cs: &mut self.cs6,
                cpc: &mut self.cpc6,
                sa: &mut self.sa6,
                da: &mut self.da6,
                cc: &mut self.cc6,
                lc: [&mut self.lc6_0, &mut self.lc6_1],
            }),
            7 => Some(ChannelRegisters {
                ftc: &mut self.ftc[7],
                cs: &mut self.cs7,
                cpc: &mut self.cpc7,
                sa: &mut self.sa7,
                da: &mut self.da7,
                cc: &mut self.cc7,
                lc: [&mut self.lc7_0, &mut self.lc7_1],
            }),
            _ => None,
        }
    }
 }
 pub struct ChannelRegisters<'a> {
    ftc: &'a mut Ftc,
    cs: &'a mut Cs,
    cpc: &'a mut Cpc,
    sa: &'a mut Sa,
    da: &'a mut Da,
    cc: &'a mut Cc,
    lc: [&'a mut Lc; 2],
 }
 #[allow(unused)]
 #[repr(u8)]
 pub enum WakeUpEvent{
    // @missing: there's a binary prefix ahead of this as per TRM 1173 Wakeup_event
    Event0  = 0b0000,
    Event1  = 0b0001,
    Event2  = 0b0010,
    Event3  = 0b0011,
    Event4  = 0b0100,
    Event5  = 0b0101,
    Event6  = 0b0110,
    Event7  = 0b0111,
    Event8  = 0b1000,
    Event9  = 0b1001,
    Event10 = 0b1010,
    Event11 = 0b1011,
    Event12 = 0b1100,
    Event13 = 0b1101,
    Event14 = 0b1110,
    Event15 = 0b1111,
 }
 #[allow(unused)]
 #[repr(u8)]
 pub enum DMAStatus{
    Stopped         = 0b0000,
    Executing       = 0b0001,
    CacheMiss       = 0b0010,
    UpdatingPc      = 0b0011,
    WaitingForEvent = 0b0100,
    Reserved0       = 0b0101,
    Reserved1       = 0b0110,
    Reserved2       = 0b0111,
    Reserved3       = 0b1000,
    Reserved4       = 0b1001,
    Reserved5       = 0b1010,
    Reserved6       = 0b1011,
    Reserved7       = 0b1100,
    Reserved8       = 0b1101,
    Reserved9       = 0b1110,
    Faulting        = 0b1111,
 }
 register!(ds, Ds, RW, u32);
 register_bit!(ds, dns, 9);
 register_bits_typed!(ds, wakeup_event, u8, WakeUpEvent, 4, 8);
 register_bits_typed!(ds, dma_status, u8, DMAStatus, 0, 3);
 register!(dpc, DPc, RW, u32);
 register_bits!(dpc, pc_mgr, u8, 0, 31);
 register!(inten, Inten, RW, u32);
 register_bits!(inten, event_irq_select, u8, 0, 31);
 register!(es, Es, RW, u32);
 register_bits!(es, dmasev_active, u8, 0, 31);
 register!(intstatus, IntStatus, RW, u32);
 register_bits!(intstatus, irq_status, u8, 0, 31);
 register!(intclr, IntClr, RW, u32);
 register_bits!(intstatus, irq_clr, u8, 0, 31);
 register!(fsm, Fsm, RW, u32);
 register_bit!(fsm, fs_mgr, 0);
 register!(fsc, Fsc, RW, u32);
 register_bits!(fsc, fault_status, u8, 0, 7);
 register!(ftm, Ftm, RW, u32);
 register_bit!(ftm, dbg_instr, 30);
 register_bit!(ftm, instr_fetch_err, 16);
 register_bit!(ftm, mgr_evnt_err, 5);
 register_bit!(ftm, dmago_err, 4);
 register_bit!(ftm, operand_invalid, 1);
 register_bit!(ftm, undef_instr, 0);
 register!(ftc, Ftc, RW, u32);
 register_bit!(ftc, lockup_err, 31);
 register_bit!(ftc, dbg_instr, 30);
 register_bit!(ftc, data_read_err, 18);
 register_bit!(ftc, data_write_err, 17);
 register_bit!(ftc, instr_fetch_err, 16);
 register_bit!(ftc, st_data_unavailable, 13);
 register_bit!(ftc, mfifo_err, 12);
 register_bit!(ftc, ch_rdwr_err, 7);
 register_bit!(ftc, ch_periph_err, 6);
 register_bit!(ftc, ch_evnt_err, 5);
 register_bit!(ftc, operand_invalid, 1);
 register_bit!(ftc, undef_instr, 0);
 register!(cs, Cs, RW, u32);
 register_bit!(cs, cns, 21);
 register_bit!(cs, dmawfp_periph, 15);
 register_bit!(cs, dmawfp_b_ns, 14);
 register_bits!(cs, wakeup_num, u8, 4, 8);
 register_bits!(cs, channel_status, u8, 0, 3);
 register!(cpc, Cpc, RW, u32);
 register_bits!(cpc, pc_chnl, u8, 0, 31);
 register!(sa, Sa, RW, u32);
 register_bits!(sa, src_addr, u8, 0, 31);
 register!(da, Da, RW, u32);
 register_bits!(da, dest_addr, u8, 0, 31);
 register!(cc, Cc, RW, u32);
 register_bits!(cc, endian_swap_size, u8, 28, 30);
 register_bits!(cc, dst_cache_ctrl, u8, 25, 27);
 register_bits!(cc, dst_prot_ctrl, u8, 22, 24);
 register_bits!(cc, dst_burst_len, u8, 18, 21);
 register_bits!(cc, dst_burst_size, u8, 15, 17);
 register_bit!(cc, dst_inc, 14);
 register_bits!(cc, src_cache_ctrl, u8, 11, 13);
 register_bits!(cc, src_prot_ctrl, u8, 8, 10);
 register_bits!(cc, src_burst_len, u8, 4, 7);
 register_bits!(cc, src_burst_size, u8, 1, 3);
 register_bit!(cc, src_inc, 0);
 register!(lc0, Lc, RW, u32);
 register_bits!(lc0, loop_counter_iteration, u8, 0, 7);
 register!(dbgstatus, DbgStatus, RW, u32);
 register_bit!(dbgstatus, dbgstatus, 0);
 register!(dbgcmd, DbgCmd, RW, u32);
 register_bits!(dbgcmd, dbgcmd, u8, 0, 1);
 register!(dbginst0, DbgInst0, RW, u32);
 register_bits!(dbginst0, instruction_byte1, u8, 24, 31);
 register_bits!(dbginst0, instruction_byte0, u8, 16, 23);
 register_bits!(dbginst0, channel_num, u8, 8, 10);
 register_bit!(dbginst0, debug_thread, 0);
 register!(dbginst1, DbgInst1, RW, u32);
 register_bits!(dbginst1, instruction_byte5, u8, 24, 31);
 register_bits!(dbginst1, instruction_byte4, u8, 16, 23);
 register_bits!(dbginst1, instruction_byte3, u8, 8, 10);
 register_bits!(dbginst1, instruction_byte2, u8, 0, 7);
 register!(cr0, Cr0, RW, u32);
 register_bits!(cr0, num_events, u8, 17, 21);
 register_bits!(cr0, num_periph_req, u8, 12, 16);
 register_bits!(cr0, num_chnls, u8, 4, 6);
 register_bit!(cr0,  mgr_ns_at_rst, 2);
 register_bit!(cr0,  boot_en, 1);
 register_bit!(cr0,  periph_req, 0);
 register!(cr1, Cr1, RW, u32);
 register_bits!(cr1, num_icache_lines, u8, 4, 7);
 register_bits!(cr1, icache_len, u8, 0, 2);
 register!(cr2, Cr2, RW, u32);
 register_bits!(cr2, boot_addr, u8, 0, 31);
 register!(cr3, Cr3, RW, u32);
 register_bits!(cr3, ins, u8, 0, 31);
 register!(cr4, Cr4, RW, u32);
 register_bits!(cr4, ins, u8, 0, 31);
 register!(crdn, Crdn, RW, u32);
 register_bits!(crdn, data_buffer_dep, u8, 20, 29);
 register_bits!(crdn, rd_q_dep, u8, 16, 19);
 register_bits!(crdn, rd_cap, u8, 12, 14);
 register_bits!(crdn, wr_q_dep, u8, 8, 11);
 register_bits!(crdn, wr_cap, u8, 4, 6);
 register_bits!(crdn, data_width, u8, 0, 2);
 register!(wd, Wd, RW, u32);
 register_bit!(wd, wd_irq_only, 0);
 register!(periph_id_0, PeriphId0, RW, u32);
 register_bits!(periph_id_0, part_number_0, u8, 0, 7);
 register!(periph_id_1, PeriphId1, RW, u32);
 register_bits!(periph_id_1, designer_0, u8, 4, 7);
 register_bits!(periph_id_1, part_number_1, u8, 0, 3);
 register!(periph_id_2, PeriphId2, RW, u32);
 register_bits!(periph_id_2, revision, u8, 4, 7);
 register_bits!(periph_id_2, designer_1, u8, 0, 3);
 register!(periph_id_3, PeriphId3, RW, u32);
 register_bit!(periph_id_3, integration_cfg, 0);
 register!(pcell_id_0, PCellId0, RW, u32);
 register_bits!(pcell_id_0, pcell_id_0, u8, 0, 7);
 register!(pcell_id_1, PCellId1, RW, u32);
 register_bits!(pcell_id_1, pcell_id_1, u8, 0, 7);
 register!(pcell_id_2, PCellId2, RW, u32);
 register_bits!(pcell_id_2, pcell_id_2, u8, 0, 7);
 register!(pcell_id_3, PCellId3, RW, u32);
 register_bits!(pcell_id_3, pcell_id_3, u8, 0, 7);
--- a/libboard_zynq/src/error_led.rs
+++ b/libboard_zynq/src/error_led.rs
@ -0,0 +1,114 @@
 use libregister::{RegisterRW, RegisterW};
 use libregister::{register, register_at, register_bit, register_bits};
 use super::slcr;
 pub struct ErrorLED {
    regs: RegisterBlock,
 }
 impl ErrorLED {
    #[cfg(feature = "target_kasli_soc")]
    pub fn error_led() -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            // Error LED at MIO pin 37
            slcr.mio_pin_37.write(
                slcr::MioPin37::zeroed()
                    .l3_sel(0b000)
                    .io_type(slcr::IoBufferType::Lvcmos25)
                    .pullup(true)
                    .disable_rcvr(true)
            );
        });
        Self::error_led_common(0xFFFF - 0x0080)
    }
    fn error_led_common(gpio_output_mask: u16) -> Self {
        // Setup register block
        let self_ = Self {
            regs: RegisterBlock::error_led(),
        };
        // Setup GPIO output mask
        self_.regs.gpio_output_mask.modify(|_, w| {
            w.mask(gpio_output_mask)
        });
        self_.regs.gpio_direction.modify(|_, w| {
            w.lederr(true)
        });
        self_
    }
    fn led_oe(&mut self, oe: bool) {
        self.regs.gpio_output_enable.modify(|_, w| {
             w.lederr(oe)
        })
    }
    fn led_o(&mut self, o: bool) {
        self.regs.gpio_output_mask.modify(|_, w| {
             w.lederr_o(o)
        })
    }
    pub fn toggle(&mut self, state: bool) {
        self.led_o(state);
        self.led_oe(state);
    }
 }
 pub struct RegisterBlock {
    pub gpio_output_mask: &'static mut GPIOOutputMask,
    pub gpio_direction: &'static mut GPIODirection,
    pub gpio_output_enable: &'static mut GPIOOutputEnable,
 }
 impl RegisterBlock {
    pub fn error_led() -> Self {
        Self {
            gpio_output_mask: GPIOOutputMask::new(),
            gpio_direction: GPIODirection::new(),
            gpio_output_enable: GPIOOutputEnable::new()
        }
    }
 }
 register!(gpio_output_mask,
            /// MASK_DATA_1_LSW:
            /// Maskable output data for MIO[47:32]
            GPIOOutputMask, RW, u32);
 #[cfg(feature = "target_kasli_soc")]
 register_at!(GPIOOutputMask, 0xE000A008, new);
 #[cfg(feature = "target_kasli_soc")]
 register_bit!(gpio_output_mask,
              /// Output for LED_ERR (MIO[37])
              lederr_o, 5);
 #[cfg(feature = "target_kasli_soc")]
 register_bits!(gpio_output_mask,
               mask, u16, 16, 31);
 register!(gpio_direction,
          /// DIRM_1:
          /// Direction mode for MIO[53:32]; 0/1 = in/out
          GPIODirection, RW, u32);
 #[cfg(feature = "target_kasli_soc")]
 register_at!(GPIODirection, 0xE000A244, new);
 #[cfg(feature = "target_kasli_soc")]
 register_bit!(gpio_direction,
              /// Direction for LED_ERR
              lederr, 5);
 register!(gpio_output_enable,
          /// OEN_1:
          /// Output enable for MIO[53:32]
          GPIOOutputEnable, RW, u32);
 #[cfg(feature = "target_kasli_soc")]
 register_at!(GPIOOutputEnable, 0xE000A248, new);
 #[cfg(feature = "target_kasli_soc")]
 register_bit!(gpio_output_enable,
              /// Output enable for LED_ERR
              lederr, 5);
--- a/libboard_zynq/src/eth/mod.rs
+++ b/libboard_zynq/src/eth/mod.rs
@ -1,5 +1,8 @@
-use core::ops::{Deref, DerefMut};
+use core::{
-use log::{error, info, warn};
+    marker::PhantomData,
    ops::{Deref, DerefMut},
 };
 use log::{debug, info, warn, error};
 use libregister::*;
 use super::slcr;
 use super::clocks::Clocks;
@ -10,6 +13,9 @@ mod regs;
 pub mod rx;
 pub mod tx;
 use super::time::Milliseconds;
 use embedded_hal::timer::CountDown;
 /// Size of all the buffers
 pub const MTU: usize = 1536;
 /// Maximum MDC clock
@ -24,7 +30,7 @@ const TX_1000: u32 = 125_000_000;
 pub struct Buffer(pub [u8; MTU]);
 impl Buffer {
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
        Buffer([0; MTU])
    }
 }
@ -42,15 +48,127 @@ impl DerefMut for Buffer {
    }
 }
-pub struct Eth<'r, RX, TX> {
+/// Gigabit Ethernet Peripheral
-    rx: RX,
+pub trait Gem {
-    tx: TX,
+    fn setup_clock(tx_clock: u32);
-    inner: EthInner<'r>,
+    fn regs() -> &'static mut regs::RegisterBlock;
    phy: Phy,
 }
-impl<'r> Eth<'r, (), ()> {
+/// first Gigabit Ethernet peripheral
-    pub fn default(macaddr: [u8; 6]) -> Self {
+pub struct Gem0;
 impl Gem for Gem0 {
    fn setup_clock(tx_clock: u32) {
        let (divisor0, divisor1) = calculate_tx_divisors(tx_clock);
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.gem0_clk_ctrl.write(
                // 0x0050_0801: 8, 5: 100 Mb/s
                // ...: 8, 1: 1000 Mb/s
                #[cfg(not(feature = "target_ebaz4205"))]
                slcr::GemClkCtrl::zeroed()
                    .clkact(true)
                    .srcsel(slcr::PllSource::IoPll)
                    .divisor(divisor0 as u8)
                    .divisor1(divisor1 as u8),
                // ebaz4205 -- EMIO
                #[cfg(feature = "target_ebaz4205")]
                slcr::GemClkCtrl::zeroed()
                    .clkact(true)
                    .srcsel(slcr::PllSource::Emio)
                    .divisor(divisor0 as u8)
                    .divisor1(divisor1 as u8)
            );
            // Enable gem0 recv clock
            slcr.gem0_rclk_ctrl.write(
                // 0x0000_0801
                #[cfg(not(feature = "target_ebaz4205"))]
                slcr::RclkCtrl::zeroed()
                    .clkact(true),
                // ebaz4205 -- EMIO
                #[cfg(feature = "target_ebaz4205")]
                slcr::RclkCtrl::zeroed()
                    .clkact(true)
                    .srcsel(true)
            );
        });
    }
    fn regs() -> &'static mut regs::RegisterBlock {
        regs::RegisterBlock::gem0()
    }
 }
 /// second Gigabit Ethernet peripheal
 pub struct Gem1;
 impl Gem for Gem1 {
    fn setup_clock(tx_clock: u32) {
        let (divisor0, divisor1) = calculate_tx_divisors(tx_clock);
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.gem1_clk_ctrl.write(
                slcr::GemClkCtrl::zeroed()
                    .clkact(true)
                    .srcsel(slcr::PllSource::IoPll)
                    .divisor(divisor0 as u8)
                    .divisor1(divisor1 as u8)
            );
            // Enable gem1 recv clock
            slcr.gem1_rclk_ctrl.write(
                // 0x0000_0801
                slcr::RclkCtrl::zeroed()
                    .clkact(true)
            );
        });
    }
    fn regs() -> &'static mut regs::RegisterBlock {
        regs::RegisterBlock::gem1()
    }
 }
 fn calculate_tx_divisors(tx_clock: u32) -> (u8, u8) {
    let io_pll = Clocks::get().io;
    let target = (tx_clock - 1 + io_pll) / tx_clock;
    let mut best = None;
    let mut best_error = 0;
    for divisor0 in 1..63 {
        for divisor1 in 1..63 {
            let current = (divisor0 as u32) * (divisor1 as u32);
            let error = if current > target {
                current - target
            } else {
                target - current
            };
            if best.is_none() || best_error > error {
                best = Some((divisor0, divisor1));
                best_error = error;
            }
        }
    }
    let result = best.unwrap();
    debug!("Eth TX clock for {}: {} / {} / {} = {}",
           tx_clock, io_pll,
           result.0, result.1,
           io_pll / result.0 as u32 / result.1 as u32
    );
    result
 }
 pub struct Eth<GEM: Gem, RX, TX> {
    rx: RX,
    tx: TX,
    inner: EthInner<GEM>,
    phy: Phy,
    /// keep track of RX path occupation to avoid needless `check_link_change()`
    idle: bool,
 }
 impl Eth<Gem0, (), ()> {
    pub fn eth0(macaddr: [u8; 6]) -> Self {
        #[cfg(not(feature = "target_ebaz4205"))]
        slcr::RegisterBlock::unlocked(|slcr| {
            // Manual example: 0x0000_1280
            // MDIO
@ -126,48 +244,48 @@ impl<'r> Eth<'r, (), ()> {
            // RX_CLK
            slcr.mio_pin_22.write(
                slcr::MioPin22::zeroed()
                    .tri_enable(true)
                    .l0_sel(true)
                    .speed(true)
                    .io_type(slcr::IoBufferType::Hstl)
                    .pullup(true)
            );
            // RX_CTRL
            slcr.mio_pin_27.write(
                slcr::MioPin27::zeroed()
                    .tri_enable(true)
                    .l0_sel(true)
                    .speed(true)
                    .io_type(slcr::IoBufferType::Hstl)
                    .pullup(true)
            );
            // RXD3
            slcr.mio_pin_26.write(
                slcr::MioPin26::zeroed()
                    .tri_enable(true)
                    .l0_sel(true)
                    .speed(true)
                    .io_type(slcr::IoBufferType::Hstl)
                    .pullup(true)
            );
            // RXD2
            slcr.mio_pin_25.write(
                slcr::MioPin25::zeroed()
                    .tri_enable(true)
                    .l0_sel(true)
                    .speed(true)
                    .io_type(slcr::IoBufferType::Hstl)
                    .pullup(true)
            );
            // RXD1
            slcr.mio_pin_24.write(
                slcr::MioPin24::zeroed()
                    .tri_enable(true)
                    .l0_sel(true)
                    .speed(true)
                    .io_type(slcr::IoBufferType::Hstl)
                    .pullup(true)
            );
            // RXD0
            slcr.mio_pin_23.write(
                slcr::MioPin23::zeroed()
                    .tri_enable(true)
                    .l0_sel(true)
                    .speed(true)
                    .io_type(slcr::IoBufferType::Hstl)
                    .pullup(true)
            );
@ -182,132 +300,102 @@ impl<'r> Eth<'r, (), ()> {
    }
    pub fn gem0(macaddr: [u8; 6]) -> Self {
-        Self::setup_gem0_clock(TX_1000);
+        Self::gem_common(macaddr)
        let regs = regs::RegisterBlock::gem0();
        Self::from_regs(regs, macaddr)
    }
 }
 impl Eth<Gem1, (), ()> {
    // TODO: Add a `eth1()`
    pub fn gem1(macaddr: [u8; 6]) -> Self {
-        Self::setup_gem1_clock(TX_1000);
+        Self::gem_common(macaddr)
-
+    }
-        let regs = regs::RegisterBlock::gem1();
+}
-        Self::from_regs(regs, macaddr)
+
 impl<GEM: Gem> Eth<GEM, (), ()> {
    fn gem_common(macaddr: [u8; 6]) -> Self {
        GEM::setup_clock(TX_1000);
        #[cfg(feature="target_kasli_soc")]
        {
            let mut eth_reset_pin = PhyRst::rst_pin();
            eth_reset_pin.reset();
        }
    fn from_regs(regs: &'r mut regs::RegisterBlock, macaddr: [u8; 6]) -> Self {
        let mut inner = EthInner {
-            regs,
+            gem: PhantomData,
            link: None,
        };
        inner.init();
        inner.configure(macaddr);
        let phy = Phy::find(&mut inner).expect("phy");
        phy.reset(&mut inner);
        phy.restart_autoneg(&mut inner);
        #[cfg(feature="target_kasli_soc")]
        phy.set_leds(&mut inner);
        Eth {
            rx: (),
            tx: (),
            inner,
            phy,
            idle: true,
        }
    }
 }
-impl<'r, RX, TX> Eth<'r, RX, TX> {
+impl<GEM: Gem, RX, TX> Eth<GEM, RX, TX> {
-    pub fn setup_gem0_clock(tx_clock: u32) {
+    pub fn start_rx(self, rx_size: usize) -> Eth<GEM, rx::DescList, TX> {
        let io_pll = Clocks::get().io;
        let d0 = ((tx_clock - 1 + io_pll) / tx_clock).max(1).min(63);
        let d1 = (io_pll / tx_clock / d0).max(1).min(63);
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.gem0_clk_ctrl.write(
                // 0x0050_0801: 8, 5: 100 Mb/s
                // ...: 8, 1: 1000 Mb/s
                slcr::GemClkCtrl::zeroed()
                    .clkact(true)
                    .srcsel(slcr::PllSource::IoPll)
                    .divisor(d0 as u8)
                    .divisor1(d1 as u8)
            );
            // Enable gem0 recv clock
            slcr.gem0_rclk_ctrl.write(
                // 0x0000_0801
                slcr::RclkCtrl::zeroed()
                    .clkact(true)
            );
        });
    }
    pub fn setup_gem1_clock(tx_clock: u32) {
        let io_pll = Clocks::get().io;
        let d0 = ((tx_clock - 1 + io_pll) / tx_clock).max(1).min(63);
        let d1 = (io_pll / tx_clock / d0).max(1).min(63);
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.gem1_clk_ctrl.write(
                slcr::GemClkCtrl::zeroed()
                    .clkact(true)
                    .srcsel(slcr::PllSource::IoPll)
                    .divisor(d0 as u8)
                    .divisor1(d1 as u8)
            );
            // Enable gem1 recv clock
            slcr.gem1_rclk_ctrl.write(
                // 0x0000_0801
                slcr::RclkCtrl::zeroed()
                    .clkact(true)
            );
        });
    }
    pub fn start_rx(self, rx_size: usize) -> Eth<'r, rx::DescList, TX> {
        let new_self = Eth {
            rx: rx::DescList::new(rx_size),
            tx: self.tx,
            inner: self.inner,
            phy: self.phy,
            idle: self.idle,
        };
        let list_addr = new_self.rx.list_addr();
        assert!(list_addr & 0b11 == 0);
-        new_self.inner.regs.rx_qbar.write(
+        GEM::regs().rx_qbar.write(
            regs::RxQbar::zeroed()
                .rx_q_baseaddr(list_addr >> 2)
        );
-        new_self.inner.regs.net_ctrl.modify(|_, w|
+        GEM::regs().net_ctrl.modify(|_, w|
            w.rx_en(true)
        );
        new_self
    }
-    pub fn start_tx(self, tx_size: usize) -> Eth<'r, RX, tx::DescList> {
+    pub fn start_tx(self, tx_size: usize) -> Eth<GEM, RX, tx::DescList> {
        let new_self = Eth {
            rx: self.rx,
            tx: tx::DescList::new(tx_size),
            inner: self.inner,
            phy: self.phy,
            idle: self.idle,
        };
        let list_addr = &new_self.tx.list_addr();
        assert!(list_addr & 0b11 == 0);
-        new_self.inner.regs.tx_qbar.write(
+        GEM::regs().tx_qbar.write(
            regs::TxQbar::zeroed()
                .tx_q_baseaddr(list_addr >> 2)
        );
-        new_self.inner.regs.net_ctrl.modify(|_, w|
+        GEM::regs().net_ctrl.modify(|_, w|
            w.tx_en(true)
        );
        new_self
    }
 }
-impl<'r, TX> Eth<'r, rx::DescList, TX> {
+impl<GEM: Gem, TX> Eth<GEM, rx::DescList, TX> {
    pub fn recv_next<'s: 'p, 'p>(&'s mut self) -> Result<Option<rx::PktRef<'p>>, rx::Error> {
-        let status = self.inner.regs.rx_status.read();
+        let status = GEM::regs().rx_status.read();
        if status.hresp_not_ok() {
            // Clear
-            self.inner.regs.rx_status.write(
+            GEM::regs().rx_status.write(
                regs::RxStatus::zeroed()
                    .hresp_not_ok(true)
            );
@ -315,7 +403,7 @@ impl<'r, TX> Eth<'r, rx::DescList, TX> {
        }
        if status.rx_overrun() {
            // Clear
-            self.inner.regs.rx_status.write(
+            GEM::regs().rx_status.write(
                regs::RxStatus::zeroed()
                    .rx_overrun(true)
            );
@ -323,7 +411,7 @@ impl<'r, TX> Eth<'r, rx::DescList, TX> {
        }
        if status.buffer_not_avail() {
            // Clear
-            self.inner.regs.rx_status.write(
+            GEM::regs().rx_status.write(
                regs::RxStatus::zeroed()
                    .buffer_not_avail(true)
            );
@ -335,28 +423,42 @@ impl<'r, TX> Eth<'r, rx::DescList, TX> {
            match result {
                Ok(None) => {
                    // No packet, clear status bit
-                    self.inner.regs.rx_status.write(
+                    GEM::regs().rx_status.write(
                        regs::RxStatus::zeroed()
                            .frame_recd(true)
                    );
                    self.idle = true;
                }
-                _ => {}
+                _ =>
                    self.idle = false,
            }
            result
        } else {
-            self.inner.check_link_change(&self.phy);
+            self.idle = true;
            Ok(None)
        }
    }
 }
-impl<'r, RX> Eth<'r, RX, tx::DescList> {
+impl<GEM: Gem, TX> libasync::smoltcp::LinkCheck for &mut Eth<GEM, rx::DescList, TX> {
-    pub fn send<'s: 'p, 'p>(&'s mut self, length: usize) -> Option<tx::PktRef<'p>> {
+    type Link = Option<phy::Link>;
-        self.tx.send(self.inner.regs, length)
+
    fn check_link_change(&mut self) -> Option<Self::Link> {
        self.inner.check_link_change(&self.phy)
    }
    fn is_idle(&self) -> bool {
        self.idle
    }
 }
-impl<'r, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescList, tx::DescList> {
+impl<GEM: Gem, RX> Eth<GEM, RX, tx::DescList> {
    pub fn send<'s: 'p, 'p>(&'s mut self, length: usize) -> Option<tx::PktRef<'p>> {
        self.tx.send(GEM::regs(), length)
    }
 }
 impl<'a, GEM: Gem> smoltcp::phy::Device<'a> for &mut Eth<GEM, rx::DescList, tx::DescList> {
    type RxToken = rx::PktRef<'a>;
    type TxToken = tx::Token<'a>;
@ -370,6 +472,7 @@ impl<'r, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescList, tx::DescLis
        let mut caps = DeviceCapabilities::default();
        caps.max_transmission_unit = MTU;
        caps.max_burst_size = Some(self.rx.len().min(self.tx.len()));
        caps.checksum = checksum_caps;
        caps
@ -379,13 +482,14 @@ impl<'r, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescList, tx::DescLis
        match self.rx.recv_next() {
            Ok(Some(pktref)) => {
                let tx_token = tx::Token {
-                    regs: self.inner.regs,
+                    regs: GEM::regs(),
                    desc_list: &mut self.tx,
                };
                self.idle = false;
                Some((pktref, tx_token))
            }
            Ok(None) => {
-                self.inner.check_link_change(&self.phy);
+                self.idle = true;
                None
            }
            Err(e) => {
@ -397,33 +501,95 @@ impl<'r, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescList, tx::DescLis
    fn transmit(&'a mut self) -> Option<Self::TxToken> {
        Some(tx::Token {
-            regs: self.inner.regs,
+            regs: GEM::regs(),
            desc_list: &mut self.tx,
        })
    }
 }
 pub struct PhyRst {
    regs: regs::GpioRegisterBlock,
    count_down: super::timer::global::CountDown<Milliseconds>,
 }
 impl PhyRst {
    pub fn rst_pin() -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            // Hardware Reset for PHY
            slcr.mio_pin_47.write(
                slcr::MioPin47::zeroed()
                    .l3_sel(0b000)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
                    .disable_rcvr(true)
            );
        });
        Self::eth_reset_common(0xFFFF - 0x8000)
    }
    fn delay_ms(&mut self, ms: u64) {
        self.count_down.start(Milliseconds(ms));
        nb::block!(self.count_down.wait()).unwrap();
    }
    fn eth_reset_common(gpio_output_mask: u16) -> Self {
        let self_ = Self {
            regs: regs::GpioRegisterBlock::regs(),
            count_down: unsafe { super::timer::GlobalTimer::get() }.countdown(),
        };
        // Setup GPIO output mask
        self_.regs.gpio_output_mask.modify(|_, w| {
            w.mask(gpio_output_mask)
        });
        self_.regs.gpio_direction.modify(|_, w| {
            w.phy_rst(true)
        });
        self_
    }
    fn oe(&mut self, oe: bool) {
        self.regs.gpio_output_enable.modify(|_, w| {
            w.phy_rst(oe)
        })
    }
    fn toggle(&mut self, o: bool) {
        self.regs.gpio_output_mask.modify(|_, w| {
            w.phy_rst(o)
        })
    }
    pub fn reset(&mut self) {
        self.toggle(false); // drive phy_rst (active LOW) pin low
        self.oe(true);         // enable pin's output
        self.delay_ms(10);
        self.toggle(true);
    }
 }
-struct EthInner<'r> {
+struct EthInner<GEM: Gem> {
-    regs: &'r mut regs::RegisterBlock,
+    gem: PhantomData<GEM>,
    link: Option<phy::Link>,
 }
-impl<'r> EthInner<'r> {
+impl<GEM: Gem> EthInner<GEM> {
    fn init(&mut self) {
        // Clear the Network Control register.
-        self.regs.net_ctrl.write(regs::NetCtrl::zeroed());
+        GEM::regs().net_ctrl.write(regs::NetCtrl::zeroed());
-        self.regs.net_ctrl.write(regs::NetCtrl::zeroed().clear_stat_regs(true));
+        GEM::regs().net_ctrl.write(regs::NetCtrl::zeroed().clear_stat_regs(true));
        // Clear the Status registers.
-        self.regs.rx_status.write(
+        GEM::regs().rx_status.write(
            regs::RxStatus::zeroed()
                .buffer_not_avail(true)
                .frame_recd(true)
                .rx_overrun(true)
                .hresp_not_ok(true)
        );
-        self.regs.tx_status.write(
+        GEM::regs().tx_status.write(
            regs::TxStatus::zeroed()
                .used_bit_read(true)
                .collision(true)
@ -437,7 +603,7 @@ impl<'r> EthInner<'r> {
                .hresp_not_ok(true)
        );
        // Disable all interrupts.
-        self.regs.intr_dis.write(
+        GEM::regs().intr_dis.write(
            regs::IntrDis::zeroed()
                .mgmt_done(true)
                .rx_complete(true)
@ -467,29 +633,32 @@ impl<'r> EthInner<'r> {
                .tsu_sec_incr(true)
        );
        // Clear the buffer queues.
-        self.regs.rx_qbar.write(
+        GEM::regs().rx_qbar.write(
            regs::RxQbar::zeroed()
        );
-        self.regs.tx_qbar.write(
+        GEM::regs().tx_qbar.write(
            regs::TxQbar::zeroed()
        );
    }
    fn configure(&mut self, macaddr: [u8; 6]) {
        let clocks = Clocks::get();
-        let mdc_clk_div = (clocks.cpu_1x() / MAX_MDC) + 1;
+        let mut mdc_clk_div = clocks.cpu_1x() / MAX_MDC;
        if clocks.cpu_1x() % MAX_MDC > 0 {
            mdc_clk_div += 1;
        }
-        self.regs.net_cfg.write(
+        GEM::regs().net_cfg.write(
            regs::NetCfg::zeroed()
                .full_duplex(true)
                .gige_en(true)
                .speed(true)
                .no_broadcast(false)
                .multi_hash_en(true)
-                // Promiscuous mode (TODO?)
+                .rx_1536_byte_frames(true)
                .copy_all(true)
                // Remove 4-byte Frame CheckSum
                .fcs_remove(true)
                .dis_cp_pause_frame(true)
                // RX checksum offload
                .rx_chksum_offld_en(true)
                // One of the slower speeds
@ -497,24 +666,25 @@ impl<'r> EthInner<'r> {
        );
        let macaddr_msbs =
-            (u16::from(macaddr[0]) << 8) |
+            (u16::from(macaddr[5]) << 8) |
-            u16::from(macaddr[1]);
+            u16::from(macaddr[4]);
        let macaddr_lsbs =
-            (u32::from(macaddr[2]) << 24) |
+            (u32::from(macaddr[3]) << 24) |
-            (u32::from(macaddr[3]) << 16) |
+            (u32::from(macaddr[2]) << 16) |
-            (u32::from(macaddr[4]) << 8) |
+            (u32::from(macaddr[1]) << 8) |
-            u32::from(macaddr[5]);
+            u32::from(macaddr[0]);
-        self.regs.spec_addr1_top.write(
+        // writing to bot would disable the specific address
-            regs::SpecAddrTop::zeroed()
+        GEM::regs().spec_addr1_bot.write(
                .addr_msbs(macaddr_msbs)
        );
        self.regs.spec_addr1_bot.write(
            regs::SpecAddrBot::zeroed()
                .addr_lsbs(macaddr_lsbs)
        );
        // writing to top would enable it again
        GEM::regs().spec_addr1_top.write(
            regs::SpecAddrTop::zeroed()
                .addr_msbs(macaddr_msbs)
        );
-
+        GEM::regs().dma_cfg.write(
        self.regs.dma_cfg.write(
            regs::DmaCfg::zeroed()
                // 1536 bytes
                .ahb_mem_rx_buf_size((MTU >> 6) as u8)
@ -530,7 +700,7 @@ impl<'r> EthInner<'r> {
                .ahb_fixed_burst_len(0x10)
        );
-        self.regs.net_ctrl.write(
+        GEM::regs().net_ctrl.write(
            regs::NetCtrl::zeroed()
                .mgmt_port_en(true)
        );
@ -538,17 +708,11 @@ impl<'r> EthInner<'r> {
    fn wait_phy_idle(&self) {
-        while !self.regs.net_status.read().phy_mgmt_idle() {}
+        while !GEM::regs().net_status.read().phy_mgmt_idle() {}
    }
-    fn check_link_change(&mut self, phy: &Phy) {
+    fn check_link_change(&mut self, phy: &Phy) -> Option<Option<phy::Link>> {
        // As the PHY access takes some time, exit early if there was
        // already a link. TODO: check once per second.
        if self.link.is_some() {
            return
        }
        let link = phy.get_link(self);
        // Check link state transition
@ -557,17 +721,15 @@ impl<'r> EthInner<'r> {
                Some(link) => {
                    info!("eth: got {:?}", link);
-                    use phy::LinkSpeed::*;
+                    use phy::{LinkDuplex::Full, LinkSpeed::*};
                    let txclock = match link.speed {
                        S10 => TX_10,
                        S100 => TX_100,
                        S1000 => TX_1000,
                    };
-                    Eth::<(), ()>::setup_gem0_clock(txclock);
+                    GEM::setup_clock(txclock);
-                    /* .full_duplex(false) doesn't work even if
+                    GEM::regs().net_cfg.modify(|_, w| w
-                       half duplex has been negotiated. */
+                        .full_duplex(link.duplex == Full)
                    self.regs.net_cfg.modify(|_, w| w
                        .full_duplex(true)
                        .gige_en(link.speed == S1000)
                        .speed(link.speed != S10)
                    );
@ -582,14 +744,17 @@ impl<'r> EthInner<'r> {
            }
            self.link = link;
            Some(link)
        } else {
            None
        }
    }
 }
-impl<'r> PhyAccess for EthInner<'r> {
+impl<GEM: Gem> PhyAccess for EthInner<GEM> {
    fn read_phy(&mut self, addr: u8, reg: u8) -> u16 {
        self.wait_phy_idle();
-        self.regs.phy_maint.write(
+        GEM::regs().phy_maint.write(
            regs::PhyMaint::zeroed()
                .clause_22(true)
                .operation(regs::PhyOperation::Read)
@ -598,12 +763,12 @@ impl<'r> PhyAccess for EthInner<'r> {
                .must_10(0b10)
        );
        self.wait_phy_idle();
-        self.regs.phy_maint.read().data()
+        GEM::regs().phy_maint.read().data()
    }
    fn write_phy(&mut self, addr: u8, reg: u8, data: u16) {
        self.wait_phy_idle();
-        self.regs.phy_maint.write(
+        GEM::regs().phy_maint.write(
            regs::PhyMaint::zeroed()
                .clause_22(true)
                .operation(regs::PhyOperation::Write)
--- a/libboard_zynq/src/eth/phy/control.rs
+++ b/libboard_zynq/src/eth/phy/control.rs
@ -82,6 +82,10 @@ impl PhyRegister for Control {
    fn addr() -> u8 {
        0
    }
    fn page() -> u8 {
        0
    }
 }
 impl From<u16> for Control {
--- a/libboard_zynq/src/eth/phy/extended_status.rs
+++ b/libboard_zynq/src/eth/phy/extended_status.rs
@ -1,59 +0,0 @@
 use bit_field::BitField;
 use super::{PhyRegister, Link, LinkDuplex, LinkSpeed};
 #[derive(Clone, Copy, Debug)]
 /// 1000Base-T Extended Status Register
 pub struct ExtendedStatus(pub u16);
 impl ExtendedStatus {
    pub fn cap_1000base_t_half(&self) -> bool {
        self.0.get_bit(12)
    }
    pub fn cap_1000base_t_full(&self) -> bool {
        self.0.get_bit(13)
    }
    pub fn cap_1000base_x_half(&self) -> bool {
        self.0.get_bit(14)
    }
    pub fn cap_1000base_x_full(&self) -> bool {
        self.0.get_bit(12)
    }
    pub fn get_link(&self) -> Option<Link> {
        if self.cap_1000base_t_half() {
            Some(Link {
                speed: LinkSpeed::S1000,
                duplex: LinkDuplex::Half,
            })
        } else if self.cap_1000base_t_full() {
            Some(Link {
                speed: LinkSpeed::S1000,
                duplex: LinkDuplex::Full,
            })
        } else if self.cap_1000base_x_half() {
            Some(Link {
                speed: LinkSpeed::S1000,
                duplex: LinkDuplex::Half,
            })
        } else if self.cap_1000base_x_full() {
            Some(Link {
                speed: LinkSpeed::S1000,
                duplex: LinkDuplex::Full,
            })
        } else {
            None
        }
    }
 }
 impl PhyRegister for ExtendedStatus {
    fn addr() -> u8 {
        0xF
    }
 }
 impl From<u16> for ExtendedStatus {
    fn from(value: u16) -> Self {
        ExtendedStatus(value)
    }
 }
--- a/libboard_zynq/src/eth/phy/id.rs
+++ b/libboard_zynq/src/eth/phy/id.rs
@ -11,6 +11,9 @@ pub struct PhyIdentifier {
 }
 pub fn identify_phy<PA: PhyAccess>(pa: &mut PA, addr: u8) -> Option<PhyIdentifier> {
    #[cfg(feature = "target_kasli_soc")]
    pa.write_phy(addr, 0x16, 0); //reset page
    let id1 = pa.read_phy(addr, 2);
    let id2 = pa.read_phy(addr, 3);
    if id1 != 0xFFFF || id2 != 0xFFFF {
--- a/libboard_zynq/src/eth/phy/leds.rs
+++ b/libboard_zynq/src/eth/phy/leds.rs
@ -0,0 +1,79 @@
 use bit_field::BitField;
 use super::{PhyRegister, Led0Control, Led1Control};
 #[derive(Clone, Copy, Debug)]
 /// LED Control Register
 pub struct Leds(pub u16);
 impl Leds {
    pub fn led0(&self) -> Led0Control {
        match self.0.get_bits(0..=3) {
            0b0000 => Led0Control::OnLinkOffNoLink,
            0b0001 => Led0Control::OnLinkBlinkActivityOffNoLink,
            0b0010 => Led0Control::BlinkDependingOnLink,
            0b0011 => Led0Control::OnActivityOffNoActivity,
            0b0100 => Led0Control::BlinkActivityOffNoActivity,
            0b0101 => Led0Control::OnTransmitOffNoTransmit,
            0b0110 => Led0Control::OnCopperLinkOffElse,
            0b0111 => Led0Control::On1000LinkOffElse,
            0b1000 => Led0Control::ForceOff,
            0b1001 => Led0Control::ForceOn,
            0b1010 => Led0Control::ForceHiZ,
            0b1011 => Led0Control::ForceBlink,
            0b1100 => Led0Control::Mode1,
            0b1101 => Led0Control::Mode2,
            0b1110 => Led0Control::Mode3,
            0b1111 => Led0Control::Mode4,
            _ => unreachable!()
        }
    }
    pub fn led1(&self) -> Led1Control {
        match self.0.get_bits(4..=7) {
            0b0000 => Led1Control::OnReceiveOffNoReceive,
            0b0001 => Led1Control::OnLinkBlinkActivityOffNoLink,
            0b0010 => Led1Control::OnLinkBlinkReceiveOffNoLink,
            0b0011 => Led1Control::OnActivityOffNoActivity,
            0b0100 => Led1Control::BlinkActivityOffNoActivity,
            0b0101 => Led1Control::On100OrFiberOffElse,
            0b0110 => Led1Control::On1001000LinkOffElse,
            0b0111 => Led1Control::On100LinkOffElse,
            0b1000 => Led1Control::ForceOff,
            0b1001 => Led1Control::ForceOn,
            0b1010 => Led1Control::ForceHiZ,
            0b1011 => Led1Control::ForceBlink,
            _ => unreachable!()
        }
    }
    pub fn set_led0(mut self, setting: Led0Control) -> Self {
        self.0.set_bits(0..=3, setting as u16);
        self
    }
    pub fn set_led1(mut self, setting: Led1Control) -> Self {
        self.0.set_bits(4..=7, setting as u16);
        self
    }
 }
 impl PhyRegister for Leds {
    fn addr() -> u8 {
        0x10
    }
    fn page() -> u8 {
        3
    }
 }
 impl From<u16> for Leds {
    fn from(value: u16) -> Self {
        Leds(value)
    }
 }
 impl Into<u16> for Leds {
    fn into(self) -> u16 {
        self.0
    }
 }
--- a/libboard_zynq/src/eth/phy/mod.rs
+++ b/libboard_zynq/src/eth/phy/mod.rs
@ -2,12 +2,14 @@ pub mod id;
 use id::{identify_phy, PhyIdentifier};
 mod status;
 pub use status::Status;
 mod extended_status;
 pub use extended_status::ExtendedStatus;
 mod control;
 pub use control::Control;
 mod pssr;
 pub use pssr::PSSR;
 mod leds;
 pub use leds::Leds;
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 pub struct Link {
    pub speed: LinkSpeed,
    pub duplex: LinkDuplex,
@ -26,58 +28,105 @@ pub enum LinkDuplex {
    Full,
 }
 #[derive(Copy, Clone, Debug, PartialEq)]
 pub enum Led0Control {
    OnLinkOffNoLink = 0b0000,
    OnLinkBlinkActivityOffNoLink = 0b0001,
    BlinkDependingOnLink = 0b0010,
    OnActivityOffNoActivity = 0b0011,
    BlinkActivityOffNoActivity = 0b0100,
    OnTransmitOffNoTransmit = 0b0101,
    OnCopperLinkOffElse = 0b0110,
    On1000LinkOffElse = 0b0111,
    ForceOff = 0b1000,
    ForceOn = 0b1001,
    ForceHiZ = 0b1010,
    ForceBlink = 0b1011,
    Mode1 = 0b1100,
    Mode2 = 0b1101,
    Mode3 = 0b1110,
    Mode4 = 0b1111
 }
 #[derive(Copy, Clone, Debug, PartialEq)]
 pub enum Led1Control {
    OnReceiveOffNoReceive = 0b0000,
    OnLinkBlinkActivityOffNoLink = 0b0001,
    OnLinkBlinkReceiveOffNoLink = 0b0010,
    OnActivityOffNoActivity = 0b0011,
    BlinkActivityOffNoActivity = 0b0100,
    On100OrFiberOffElse = 0b0101,
    On1001000LinkOffElse = 0b0110,
    On100LinkOffElse = 0b0111,
    ForceOff = 0b1000,
    ForceOn = 0b1001,
    ForceHiZ = 0b1010,
    ForceBlink = 0b1011,
 }
 pub trait PhyAccess {
    fn read_phy(&mut self, addr: u8, reg: u8) -> u16;
    fn write_phy(&mut self, addr: u8, reg: u8, data: u16);
 }
 pub trait PhyRegister {
    fn addr() -> u8;
    fn page() -> u8;
 }
 #[derive(Clone)]
 pub struct Phy {
    pub addr: u8,
    device: PhyDevice,
 }
-#[derive(Clone, Copy)]
+const OUI_MARVELL: u32 = 0x005043;
 pub enum PhyDevice {
    Marvel88E1116R,
    Rtl8211E,
 }
 const OUI_MARVEL: u32 = 0x005043;
 const OUI_REALTEK: u32 = 0x000732;
 const OUI_LANTIQ : u32 = 0x355969;
 const OUI_ICPLUS : u32 = 0x0090c3;
 //only change pages on Kasli-SoC's Marvel 88E11xx
 #[cfg(feature="target_kasli_soc")]
 const PAGE_REGISTER: u8 = 0x16;
 impl Phy {
    /// Probe all addresses on MDIO for a known PHY
    pub fn find<PA: PhyAccess>(pa: &mut PA) -> Option<Phy> {
-        for addr in 1..32 {
+        (0..32).find(|addr| {
-            let device = match identify_phy(pa, addr) {
+            match identify_phy(pa, *addr) {
                Some(PhyIdentifier {
-                    oui: OUI_MARVEL,
+                    oui: OUI_MARVELL,
                    // Marvell 88E1116R
                    model: 36,
                    ..
-                }) => Some(PhyDevice::Marvel88E1116R),
+                }) => true,
                Some(PhyIdentifier {
                    oui: OUI_MARVELL,
                    // Marvell 88E1512
                    model: 29,
                    ..
                }) => true,
                Some(PhyIdentifier {
                    oui: OUI_REALTEK,
                    // RTL 8211E
                    model: 0b010001,
                    rev: 0b0101,
-                }) => Some(PhyDevice::Rtl8211E),
+                }) => true,
-                _ => None,
+                Some(PhyIdentifier {
-            };
+                    oui: OUI_LANTIQ,
-            match device {
+                    // Intel XWAY PHY11G (PEF 7071/PEF 7072) v1.5 / v1.6
-                Some(device) =>
+                    model: 0,
-                    return Some(Phy { addr, device }),
+                    ..
-                None => {}
+                }) => true,
-            }
+                Some(PhyIdentifier {
-        }
+                    oui: OUI_ICPLUS,
-
+                    // IP101G-DS-R01
-        None
+                    model: 5,
-    }
+                    rev: 4,
-
+                }) => true,
-    pub fn name(&self) -> &'static str {
+                _ => false,
        match self.device {
            PhyDevice::Marvel88E1116R => &"Marvel 88E1116R",
            PhyDevice::Rtl8211E => &"RTL8211E",
            }
        }).map(|addr| Phy { addr })
    }
    pub fn read_reg<PA, PR>(&self, pa: &mut PA) -> PR
@ -85,6 +134,9 @@ impl Phy {
        PA: PhyAccess,
        PR: PhyRegister + From<u16>,
    {
        #[cfg(feature="target_kasli_soc")]
        pa.write_phy(self.addr, PAGE_REGISTER, PR::page().into());
        pa.read_phy(self.addr, PR::addr()).into()
    }
@ -94,6 +146,9 @@ impl Phy {
        PR: PhyRegister + From<u16> + Into<u16>,
        F: FnMut(PR) -> PR,
    {
        #[cfg(feature="target_kasli_soc")]
        pa.write_phy(self.addr, PAGE_REGISTER, PR::page().into());
        let reg = pa.read_phy(self.addr, PR::addr()).into();
        let reg = f(reg);
        pa.write_phy(self.addr, PR::addr(), reg.into())
@ -107,6 +162,14 @@ impl Phy {
        self.modify_reg(pa, f)
    }
    pub fn modify_leds<PA, F>(&self, pa: &mut PA, f: F)
    where
        PA: PhyAccess,
        F: FnMut(Leds) -> Leds,
    {
        self.modify_reg(pa, f)   
    }
    pub fn get_control<PA: PhyAccess>(&self, pa: &mut PA) -> Control {
        self.read_reg(pa)
    }
@ -120,12 +183,8 @@ impl Phy {
        if !status.link_status() {
            None
        } else if status.cap_1000base_t_extended_status() {
-            let ext_status: ExtendedStatus = self.read_reg(pa);
+            let phy_status: PSSR = self.read_reg(pa);
-            if let Some(link) = ext_status.get_link() {
+            phy_status.get_link()
                Some(link)
            } else {
                status.get_link()
            }
        } else {
            status.get_link()
        }
@ -144,8 +203,12 @@ impl Phy {
                .set_restart_autoneg(true)
        );
    }
 }
-pub trait PhyRegister {
+    #[cfg(feature="target_kasli_soc")]
-    fn addr() -> u8;
+    pub fn set_leds<PA: PhyAccess>(&self, pa: &mut PA) {
        self.modify_leds(pa, |leds|
            leds.set_led0(Led0Control::OnCopperLinkOffElse)
                .set_led1(Led1Control::BlinkActivityOffNoActivity)
        );
    }
 }
--- a/libboard_zynq/src/eth/phy/pssr.rs
+++ b/libboard_zynq/src/eth/phy/pssr.rs
@ -0,0 +1,56 @@
 use bit_field::BitField;
 use super::{PhyRegister, Link, LinkDuplex, LinkSpeed};
 #[derive(Clone, Copy, Debug)]
 /// PHY-Specific Status Register
 pub struct PSSR(pub u16);
 impl PSSR {
    pub fn link(&self) -> bool {
        self.0.get_bit(10)
    }
    pub fn duplex(&self) -> LinkDuplex {
        if self.0.get_bit(13) {
            LinkDuplex::Full
        } else {
            LinkDuplex::Half
        }
    }
    pub fn speed(&self) -> Option<LinkSpeed> {
        match self.0.get_bits(14..=15) {
            0b00 => Some(LinkSpeed::S10),
            0b01 => Some(LinkSpeed::S100),
            0b10 => Some(LinkSpeed::S1000),
            _ => None,
        }
    }
    pub fn get_link(&self) -> Option<Link> {
        if self.link() {
            Some(Link {
                speed: self.speed()?,
                duplex: self.duplex(),
            })
        } else {
            None
        }
    }
 }
 impl PhyRegister for PSSR {
    fn addr() -> u8 {
        0x11
    }
    fn page() -> u8 {
        0
    }
 }
 impl From<u16> for PSSR {
    fn from(value: u16) -> Self {
        PSSR(value)
    }
 }
--- a/libboard_zynq/src/eth/phy/status.rs
+++ b/libboard_zynq/src/eth/phy/status.rs
@ -55,12 +55,22 @@ impl Status {
    pub fn get_link(&self) -> Option<Link> {
        if ! self.link_status() {
            None
-        } else if self.cap_10base_t_half() {
+        } else if self.cap_100base_tx_full() {
            Some(Link {
-                speed: LinkSpeed::S10,
+                speed: LinkSpeed::S100,
                duplex: LinkDuplex::Full,
            })
        } else if self.cap_100base_tx_half() {
            Some(Link {
                speed: LinkSpeed::S100,
                duplex: LinkDuplex::Half,
            })
-        } else if self.cap_10base_t_full() {
+        } else if self.cap_100base_t4() {
            Some(Link {
                speed: LinkSpeed::S100,
                duplex: LinkDuplex::Half,
            })
        } else if self.cap_10base_t2_full() {
            Some(Link {
                speed: LinkSpeed::S10,
                duplex: LinkDuplex::Full,
@ -70,26 +80,16 @@ impl Status {
                speed: LinkSpeed::S10,
                duplex: LinkDuplex::Half,
            })
-        } else if self.cap_10base_t2_full() {
+        } else if self.cap_10base_t_full() {
            Some(Link {
                speed: LinkSpeed::S10,
                duplex: LinkDuplex::Full,
            })
-        } else if self.cap_100base_t4() {
+        } else if self.cap_10base_t_half() {
            Some(Link {
-                speed: LinkSpeed::S100,
+                speed: LinkSpeed::S10,
                duplex: LinkDuplex::Half,
            })
        } else if self.cap_100base_tx_half() {
            Some(Link {
                speed: LinkSpeed::S100,
                duplex: LinkDuplex::Half,
            })
        } else if self.cap_100base_tx_full() {
            Some(Link {
                speed: LinkSpeed::S100,
                duplex: LinkDuplex::Full,
            })
        } else {
            None
        }
@ -100,6 +100,10 @@ impl PhyRegister for Status {
    fn addr() -> u8 {
        1
    }
    fn page() -> u8 {
        0
    }
 }
 impl From<u16> for Status {
--- a/libboard_zynq/src/eth/regs.rs
+++ b/libboard_zynq/src/eth/regs.rs
@ -1,6 +1,6 @@
 use volatile_register::{RO, WO, RW};
-use libregister::{register, register_bit, register_bits, register_bits_typed};
+use libregister::{register, register_at, register_bit, register_bits, register_bits_typed};
 #[repr(C)]
 pub struct RegisterBlock {
@ -110,18 +110,51 @@ pub struct RegisterBlock {
    pub design_cfg5: RO<u32>,
 }
-impl RegisterBlock {
+pub struct GpioRegisterBlock {
-    const GEM0: *mut Self = 0xE000B000 as *mut _;
+    pub gpio_output_mask: &'static mut OutputMask,
-    const GEM1: *mut Self = 0xE000C000 as *mut _;
+    pub gpio_direction: &'static mut Direction,
-
+    pub gpio_output_enable: &'static mut OutputEnable,
    pub fn gem0() -> &'static mut Self {
        unsafe { &mut *Self::GEM0 }
 }
-    pub fn gem1() -> &'static mut Self {
+impl GpioRegisterBlock {
-        unsafe { &mut *Self::GEM1 }
+    pub fn regs() -> Self {
        Self {
            gpio_output_mask: OutputMask::new(),
            gpio_direction: Direction::new(),
            gpio_output_enable: OutputEnable::new(),
        }
    }
 }
 register!(gpio_output_mask, 
            /// MASK_DATA_1_SW:
            /// Maskable output data for MIO[47:32]
            OutputMask, RW, u32);
 register_at!(OutputMask, 0xE000A008, new);
 register_bit!(gpio_output_mask, 
            /// Output for PHY_RST (MIO[47])
            phy_rst, 15);
 register_bits!(gpio_output_mask,
            mask, u16, 16, 31);
 register!(gpio_direction, 
            /// DIRM_1:
            /// Direction mode for MIO[53:32]; 0/1 = in/out
            Direction, RW, u32);
 register_at!(Direction, 0xE000A244, new);
 register_bit!(gpio_direction,
            /// Direction for PHY_RST
            phy_rst, 15);
 register!(gpio_output_enable,
            /// OEN_1:
            /// Output enable for MIO[53:32]
            OutputEnable, RW, u32);
 register_at!(OutputEnable, 0xE000A248, new);
 register_bit!(gpio_output_enable,
            /// Output enable for PHY_RST
            phy_rst, 15);
 register_at!(RegisterBlock, 0xE000B000, gem0);
 register_at!(RegisterBlock, 0xE000C000, gem1);
 register!(net_ctrl, NetCtrl, RW, u32);
 register_bit!(net_ctrl, loopback_local, 1);
--- a/libboard_zynq/src/eth/rx.rs
+++ b/libboard_zynq/src/eth/rx.rs
@ -2,8 +2,6 @@ use core::ops::Deref;
 use alloc::{vec, vec::Vec};
 use libcortex_a9::{asm::*, cache::*, UncachedSlice};
 use libregister::*;
 use log::debug;
 use crate::l2cache;
 use super::Buffer;
 #[derive(Debug)]
@ -83,6 +81,9 @@ impl DescList {
            entry.word1.write(
                DescWord1::zeroed()
            );
            // Flush buffer from cache, to be filled by the peripheral
            // before next read
            dcci_slice(&buffer[..]);
        }
        DescList {
@ -92,6 +93,10 @@ impl DescList {
        }
    }
    pub fn len(&self) -> usize {
        self.list.len().min(self.buffers.len())
    }
    pub fn list_addr(&self) -> u32 {
        &self.list[0] as *const _ as u32
    }
@ -103,10 +108,21 @@ impl DescList {
        if entry.word0.read().used() {
            let word1 = entry.word1.read();
            let len = word1.frame_length_lsbs().into();
            let padding = {
                let diff = len % 0x20;
                if diff == 0 {
                    0
                } else {
                    0x20 - diff
                }
            };
            unsafe {
                // invalidate the buffer
                // we cannot do it in the drop function, as L2 cache data prefetch would prefetch
                // the data, and there is no way for us to prevent that unless changing MMU table.
                dci_slice(&mut self.buffers[self.next][0..len + padding]);
            }
            let buffer = &mut self.buffers[self.next][0..len];
            // Invalidate caches for packet buffer
            l2cache().invalidate_slice(&mut buffer[..]);
            dcci_slice(&buffer[..]);
            self.next += 1;
            if self.next >= list_len {
@ -115,10 +131,8 @@ impl DescList {
            let pkt = PktRef { entry, buffer };
            if word1.start_of_frame() && word1.end_of_frame() {
                // debug!("pkt {}: {:08X}..{:08X}", len, &pkt.buffer[0] as *const _ as usize, &pkt.buffer[pkt.len()-1] as *const _ as usize);
                Ok(Some(pkt))
            } else {
                debug!("pkt trunc");
                Err(Error::Truncated)
            }
        } else {
@ -135,7 +149,6 @@ pub struct PktRef<'a> {
 impl<'a> Drop for PktRef<'a> {
    fn drop(&mut self) {
        self.entry.word0.modify(|_, w| w.used(false));
        dmb();
    }
--- a/libboard_zynq/src/eth/tx.rs
+++ b/libboard_zynq/src/eth/tx.rs
@ -1,9 +1,7 @@
 use core::ops::{Deref, DerefMut};
 use alloc::{vec, vec::Vec};
-use libcortex_a9::{asm::dmb, cache::dcc_slice, UncachedSlice};
+use libcortex_a9::{cache::dcc_slice, UncachedSlice};
 use libregister::*;
 use log::{debug, warn};
 use crate::l2cache;
 use super::{Buffer, regs};
 /// Descriptor entry
@ -87,15 +85,17 @@ impl DescList {
        }
    }
    pub fn len(&self) -> usize {
        self.list.len().min(self.buffers.len())
    }
    pub fn list_addr(&self) -> u32 {
        &self.list[0] as *const _ as u32
    }
    pub fn send<'s: 'p, 'p>(&'s mut self, regs: &'s mut regs::RegisterBlock, length: usize) -> Option<PktRef<'p>> {
        // debug!("send {}", length);
        let list_len = self.list.len();
        let entry = &mut self.list[self.next];
        dmb();
        if entry.word1.read().used() {
            let buffer = &mut self.buffers[self.next][0..length];
            entry.word1.write(DescWord1::zeroed()
@ -113,7 +113,6 @@ impl DescList {
            Some(PktRef { entry, buffer, regs })
        } else {
            // Still in use by HW (sending too fast, ring exceeded)
            warn!("tx ring overflow");
            None
        }
    }
@ -129,19 +128,14 @@ pub struct PktRef<'a> {
 impl<'a> Drop for PktRef<'a> {
    fn drop(&mut self) {
-        // Write back all dirty cachelines of packet buffer
+        // Write back all dirty cachelines of this buffer
        dcc_slice(self.buffer);
        l2cache().clean_slice(self.buffer);
        self.entry.word1.modify(|_, w| w.used(false));
-        dmb();
+        // Start the TX engine
        // dsb();
        if ! self.regs.tx_status.read().tx_go() {
            // Start TX if not already running
        self.regs.net_ctrl.modify(|_, w| w.start_tx(true));
    }
 }
 }
 impl<'a> Deref for PktRef<'a> {
    type Target = [u8];
@ -170,10 +164,7 @@ impl<'a> smoltcp::phy::TxToken for Token<'a> {
            None =>
                Err(smoltcp::Error::Exhausted),
            Some(mut pktref) => {
-                let result = f(pktref.deref_mut());
+                f(pktref.deref_mut())
                // TODO: on result.is_err() don;t send
                drop(pktref);
                result
            }
        }
    }
--- a/libboard_zynq/src/flash/bytes.rs
+++ b/libboard_zynq/src/flash/bytes.rs
@ -1,41 +0,0 @@
 pub trait BytesTransferExt: Sized {
    // Turn u32 into u8
    fn bytes_transfer(self) -> BytesTransfer<Self>
    where
        Self: Iterator<Item = u32>;
 }
 impl<I: Iterator<Item = u32>> BytesTransferExt for I {
    // Turn u32 into u8
    fn bytes_transfer(self) -> BytesTransfer<Self> {
        BytesTransfer {
            iter: self,
            shift: 0,
            word: 0,
        }
    }
 }
 pub struct BytesTransfer<I: Iterator<Item = u32> + Sized> {
    iter: I,
    shift: u8,
    word: u32,
 }
 impl<I: Iterator<Item = u32> + Sized> Iterator for BytesTransfer<I> {
    type Item = u8;
    fn next(&mut self) -> Option<u8> {
        if self.shift > 0 {
            self.shift -= 8;
            Some((self.word >> self.shift) as u8)
        } else {
            self.iter.next()
                .and_then(|word| {
                    self.shift = 32;
                    self.word = word;
                    self.next()
                })
        }
    }
 }
--- a/libboard_zynq/src/flash/mod.rs
+++ b/libboard_zynq/src/flash/mod.rs
@ -1,503 +0,0 @@
 //! Quad-SPI Flash Controller
 use core::marker::PhantomData;
 use log::{error, info, warn};
 use libregister::{RegisterR, RegisterW, RegisterRW};
 use crate::{print, println};
 use super::slcr;
 use super::clocks::source::{IoPll, ClockSource};
 mod regs;
 mod bytes;
 pub use bytes::{BytesTransferExt, BytesTransfer};
 mod spi_flash_register;
 use spi_flash_register::*;
 mod transfer;
 use transfer::Transfer;
 const FLASH_BAUD_RATE: u32 = 50_000_000;
 /// 16 MB
 pub const SINGLE_CAPACITY: u32 = 0x1000000;
 pub const SECTOR_SIZE: u32 = 0x10000;
 pub const PAGE_SIZE: u32 = 0x100;
 /// Instruction: Read Identification
 const INST_RDID: u8 = 0x9F;
 /// Instruction: Read
 const INST_READ: u8 = 0x03;
 /// Instruction: Quad I/O Fast Read
 const INST_4IO_FAST_READ: u8 = 0xEB;
 /// Instruction: Write Disable
 const INST_WRDI: u8 = 0x04;
 /// Instruction: Write Enable
 const INST_WREN: u8 = 0x06;
 /// Instruction: Program page
 const INST_PP: u8 = 0x02;
 /// Instruction: Erase 4K Block
 const INST_BE_4K: u8 = 0x20;
 #[derive(Clone)]
 pub enum SpiWord {
    W8(u8),
    W16(u16),
    W24(u32),
    W32(u32),
 }
 impl From<u8> for SpiWord {
    fn from(x: u8) -> Self {
        SpiWord::W8(x)
    }
 }
 impl From<u16> for SpiWord {
    fn from(x: u16) -> Self {
        SpiWord::W16(x)
    }
 }
 impl From<u32> for SpiWord {
    fn from(x: u32) -> Self {
        SpiWord::W32(x)
    }
 }
 /// Memory-mapped mode
 pub struct LinearAddressing;
 /// Manual I/O mode
 pub struct Manual;
 /// Flash Interface Driver
 ///
 /// For 2x Spansion S25FL128SAGMFIR01
 pub struct Flash<MODE> {
    regs: &'static mut regs::RegisterBlock,
    _mode: PhantomData<MODE>,
 }
 impl<MODE> Flash<MODE> {
    fn transition<TO>(self) -> Flash<TO> {
        Flash {
            regs: self.regs,
            _mode: PhantomData,
        }
    }
    fn disable_interrupts(&mut self) {
        self.regs.intr_dis.write(
            regs::IntrDis::zeroed()
                .rx_overflow(true)
                .tx_fifo_not_full(true)
                .tx_fifo_full(true)
                .rx_fifo_not_empty(true)
                .rx_fifo_full(true)
                .tx_fifo_underflow(true)
        );
    }
    fn clear_rx_fifo(&self) {
        while self.regs.intr_status.read().rx_fifo_not_empty() {
            let _ = self.regs.rx_data.read();
        }
    }
    fn clear_interrupt_status(&mut self) {
        self.regs.intr_status.write(
            regs::IntrStatus::zeroed()
                .rx_overflow(true)
                .tx_fifo_underflow(true)
        );
    }
    fn wait_tx_fifo_flush(&mut self) {
        self.regs.config.modify(|_, w| w.man_start_com(true));
        while !self.regs.intr_status.read().tx_fifo_not_full() {}
    }
 }
 impl Flash<()> {
    pub fn new(clock: u32) -> Self {
        Self::enable_clocks(clock);
        Self::setup_signals();
        Self::reset();
        let regs = regs::RegisterBlock::qspi();
        let mut flash = Flash { regs, _mode: PhantomData };
        flash.configure((FLASH_BAUD_RATE - 1 + clock) / FLASH_BAUD_RATE);
        flash
    }
    /// typical: `200_000_000` Hz
    fn enable_clocks(clock: u32) {
        let io_pll = IoPll::freq();
        let divisor = ((clock - 1 + io_pll) / clock)
            .max(1).min(63) as u8;
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.lqspi_clk_ctrl.write(
                slcr::LqspiClkCtrl::zeroed()
                    .src_sel(slcr::PllSource::IoPll)
                    .divisor(divisor)
                    .clkact(true)
            );
        });
    }
    fn setup_signals() {
        slcr::RegisterBlock::unlocked(|slcr| {
            // 1. Configure MIO pin 1 for chip select 0 output.
            slcr.mio_pin_01.write(
                slcr::MioPin01::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            // Configure MIO pins 2 through 5 for I/O.
            slcr.mio_pin_02.write(
                slcr::MioPin02::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
            );
            slcr.mio_pin_03.write(
                slcr::MioPin03::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
            );
            slcr.mio_pin_04.write(
                slcr::MioPin04::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
            );
            slcr.mio_pin_05.write(
                slcr::MioPin05::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
            );
            // 3. Configure MIO pin 6 for serial clock 0 output.
            slcr.mio_pin_06.write(
                slcr::MioPin06::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
            );
            // Option: Add Second Device Chip Select
            // 4. Configure MIO pin 0 for chip select 1 output.
            slcr.mio_pin_00.write(
                slcr::MioPin00::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
            );
            // Option: Add Second Serial Clock
            // 5. Configure MIO pin 9 for serial clock 1 output.
            slcr.mio_pin_09.write(
                slcr::MioPin09::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            // Option: Add 4-bit Data
            // 6. Configure MIO pins 10 through 13 for I/O.
            slcr.mio_pin_10.write(
                slcr::MioPin10::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            slcr.mio_pin_11.write(
                slcr::MioPin11::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            slcr.mio_pin_12.write(
                slcr::MioPin12::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            slcr.mio_pin_13.write(
                slcr::MioPin13::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            // Option: Add Feedback Output Clock
            // 7. Configure MIO pin 8 for feedback clock.
            slcr.mio_pin_08.write(
                slcr::MioPin08::zeroed()
                    .l0_sel(true)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
        });
    }
    fn reset() {
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.lqspi_rst_ctrl.write(
                slcr::LqspiRstCtrl::zeroed()
                    .ref_rst(true)
                    .cpu1x_rst(true)
            );
            slcr.lqspi_rst_ctrl.write(
                slcr::LqspiRstCtrl::zeroed()
            );
        });
    }
    fn configure(&mut self, divider: u32) {
        // Disable
        self.regs.enable.write(
            regs::Enable::zeroed()
        );
        self.disable_interrupts();
        self.regs.lqspi_cfg.write(
            regs::LqspiCfg::zeroed()
        );
        self.clear_rx_fifo();
        self.clear_interrupt_status();
        // for a baud_rate_div=1 LPBK_DLY_ADJ would be required
        let mut baud_rate_div = 2u32;
        while baud_rate_div < 7 && 2u32.pow(1 + baud_rate_div) < divider {
            baud_rate_div += 1;
        }
        self.regs.config.write(regs::Config::zeroed()
            .baud_rate_div(baud_rate_div as u8)
            .mode_sel(true)
            .leg_flsh(true)
            .holdb_dr(true)
            // 32 bits TX FIFO width
            .fifo_width(0b11)
        );
        // Initialize RX/TX pipes thresholds
        unsafe {
            self.regs.rx_thres.write(1);
            self.regs.tx_thres.write(1);
        }
    }
    pub fn linear_addressing_mode(self) -> Flash<LinearAddressing> {
        // Set manual start enable to auto mode.
        // Assert the chip select.
        self.regs.config.modify(|_, w| w
            .man_start_en(false)
            .pcs(false)
            .manual_cs(false)
        );
        self.regs.lqspi_cfg.write(regs::LqspiCfg::zeroed()
            // Quad I/O Fast Read
            .inst_code(INST_4IO_FAST_READ)
            .dummy_mask(0x2)
            .mode_en(false)
            .mode_bits(0xFF)
            // 2 devices
            .two_mem(true)
            .u_page(false)
            // Quad SPI mode
            .lq_mode(true)
        );
        self.regs.enable.write(
            regs::Enable::zeroed()
                .spi_en(true)
        );
        self.transition()
    }
    pub fn manual_mode(self, chip_index: usize) -> Flash<Manual> {
        self.regs.config.modify(|_, w| w
            .man_start_en(true)
            .manual_cs(true)
            .endian(true)
        );
        self.regs.lqspi_cfg.write(regs::LqspiCfg::zeroed()
            // Quad I/O Fast Read
            .inst_code(INST_READ)
            .dummy_mask(0x2)
            .mode_en(false)
            .mode_bits(0xFF)
            // 2 devices
            .two_mem(true)
            .u_page(chip_index != 0)
            // Quad SPI mode
            .lq_mode(false)
        );
        self.transition()
    }
 }
 impl Flash<LinearAddressing> {
    /// Stop linear addressing mode
    pub fn stop(self) -> Flash<()> {
        self.regs.enable.modify(|_, w| w.spi_en(false));
        // De-assert chip select.
        self.regs.config.modify(|_, w| w.pcs(true));
        self.transition()
    }
    pub fn ptr<T>(&mut self) -> *mut T {
        0xFC00_0000 as *mut _
    }
    pub fn size(&self) -> usize {
        2 * (SINGLE_CAPACITY as usize)
    }
 }
 impl Flash<Manual> {
    pub fn stop(self) -> Flash<()> {
        self.transition()
    }
    pub fn read_reg<R: SpiFlashRegister>(&mut self) -> R {
        let args = Some(R::inst_code());
        let transfer = self.transfer(args.into_iter(), 2)
            .bytes_transfer();
        R::new(transfer.skip(1).next().unwrap())
    }
    pub fn read_reg_until<R, F, A>(&mut self, f: F) -> A
    where
        R: SpiFlashRegister,
        F: Fn(R) -> Option<A>,
    {
        let mut result = None;
        while result.is_none() {
            let args = Some(R::inst_code());
            for b in self.transfer(args.into_iter(), 32)
                .bytes_transfer().skip(1) {
                    result = f(R::new(b));
                    if result.is_none() {
                        break;
                    }
                }
        }
        result.unwrap()
    }
    /// Status Register-1 remains `0x00` immediately after invoking a command.
    fn wait_while_sr1_zeroed(&mut self) -> SR1 {
        self.read_reg_until::<SR1, _, SR1>(|sr1|
            if sr1.is_zeroed() {
                None
            } else {
                Some(sr1)
            }
        )
    }
    /// Read Identification
    pub fn rdid(&mut self) -> core::iter::Skip<BytesTransfer<Transfer<core::option::IntoIter<u32>, u32>>> {
        let args = Some((INST_RDID as u32) << 24);
        self.transfer(args.into_iter(), 0x44)
            .bytes_transfer().skip(1)
    }
    /// Read flash data
    pub fn read(&mut self, offset: u32, len: usize
    ) -> core::iter::Take<core::iter::Skip<BytesTransfer<Transfer<core::option::IntoIter<u32>, u32>>>>
    {
        let args = Some(((INST_READ as u32) << 24) | (offset as u32));
        self.transfer(args.into_iter(), len + 6)
            .bytes_transfer().skip(6).take(len)
    }
    pub fn erase(&mut self, offset: u32) {
        let args = Some(((INST_BE_4K as u32) << 24) | (offset as u32));
        self.transfer(args.into_iter(), 4);
        let sr1 = self.wait_while_sr1_zeroed();
        if sr1.e_err() {
            error!("E_ERR");
        } else if sr1.p_err() {
            error!("P_ERR");
        } else if sr1.wip() {
            info!("Erase in progress");
            while self.read_reg::<SR1>().wip() {
                print!(".");
            }
            println!("");
        } else {
            warn!("erased? sr1={:02X}", sr1.inner);
        }
    }
    pub fn program<I: Iterator<Item=u32>>(&mut self, offset: u32, data: I) {
        {
            let len = 4 + 4 * data.size_hint().0;
            let args = Some(SpiWord::W32(((INST_PP as u32) << 24) | (offset as u32))).into_iter()
                .chain(data.map(SpiWord::W32));
            self.transfer(args, len);
        }
        // let sr1 = self.wait_while_sr1_zeroed();
        let sr1 = self.read_reg::<SR1>();
        if sr1.e_err() {
            error!("E_ERR");
        } else if sr1.p_err() {
            error!("P_ERR");
        } else if sr1.wip() {
            info!("Program in progress");
            while self.read_reg::<SR1>().wip() {
                print!(".");
            }
            println!("");
        } else {
            warn!("programmed? sr1={:02X}", sr1.inner);
        }
    }
    pub fn write_enabled<F: Fn(&mut Self) -> R, R>(&mut self, f: F) -> R {
        // Write Enable
        let args = Some(INST_WREN);
        self.transfer(args.into_iter(), 1);
        self.regs.gpio.modify(|_, w| w.wp_n(true));
        let sr1 = self.wait_while_sr1_zeroed();
        if !sr1.wel() {
            panic!("Cannot write-enable flash");
        }
        let result = f(self);
        // Write Disable
        let args = Some(INST_WRDI);
        self.transfer(args.into_iter(), 1);
        self.regs.gpio.modify(|_, w| w.wp_n(false));
        result
    }
    pub fn transfer<'s: 't, 't, Args, W>(&'s mut self, args: Args, len: usize) -> Transfer<'t, Args, W>
    where
        Args: Iterator<Item = W>,
        W: Into<SpiWord>,
    {
        Transfer::new(self, args, len)
    }
    pub fn dump(&mut self, label: &'_ str, inst_code: u8) {
        print!("{}:", label);
        let args = Some(u32::from(inst_code) << 24);
        for b in self.transfer(args.into_iter(), 32).bytes_transfer() {
            print!(" {:02X}", b);
        }
        println!("");
    }
 }
--- a/libboard_zynq/src/flash/regs.rs
+++ b/libboard_zynq/src/flash/regs.rs
@ -1,126 +0,0 @@
 use volatile_register::{RO, WO, RW};
 use libregister::{register, register_bit, register_bits};
 #[repr(C)]
 pub struct RegisterBlock {
    pub config: Config,
    pub intr_status: IntrStatus,
    pub intr_en: IntrEn,
    pub intr_dis: IntrDis,
    pub intr_mask: RO<u32>,
    pub enable: Enable,
    pub delay: RW<u32>,
    pub txd0: WO<u32>,
    pub rx_data: RO<u32>,
    pub slave_idle_count: RW<u32>,
    pub tx_thres: RW<u32>,
    pub rx_thres: RW<u32>,
    pub gpio: QspiGpio,
    pub _unused1: RO<u32>,
    pub lpbk_dly_adj: RW<u32>,
    pub _unused2: [RO<u32>; 17],
    pub txd1: WO<u32>,
    pub txd2: WO<u32>,
    pub txd3: WO<u32>,
    pub _unused3: [RO<u32>; 5],
    pub lqspi_cfg: LqspiCfg,
    pub lqspi_sts: RW<u32>,
    pub _unused4: [RO<u32>; 21],
    pub mod_id: RW<u32>,
 }
 impl RegisterBlock {
    const BASE_ADDRESS: *mut Self = 0xE000D000 as *mut _;
    pub fn qspi() -> &'static mut Self {
        unsafe { &mut *Self::BASE_ADDRESS }
    }
 }
 register!(config, Config, RW, u32);
 register_bit!(config,
              /// Enables master mode
              mode_sel, 0);
 register_bit!(config,
              /// Clock polarity low/high
              clk_pol, 1);
 register_bit!(config,
              /// Clock phase
              clk_ph, 2);
 register_bits!(config,
               /// divider = 2 ** (1 + baud_rate_div)
               baud_rate_div, u8, 3, 5);
 register_bits!(config,
               /// Must be set to 0b11
               fifo_width, u8, 6, 7);
 register_bit!(config,
              /// Must be 0
              ref_clk, 8);
 register_bit!(config,
              /// Peripheral Chip Select Line
              pcs, 10);
 register_bit!(config,
              /// false: auto mode, true: manual CS mode
              manual_cs, 14);
 register_bit!(config,
              /// false: auto mode, true: enables manual start enable
              man_start_en, 15);
 register_bit!(config,
              /// false: auto mode, true: enables manual start command
              man_start_com, 16);
 register_bit!(config, holdb_dr, 19);
 register_bit!(config,
              /// false: little, true: endian
              endian, 26);
 register_bit!(config,
              /// false: legacy SPI mode, true: Flash memory interface mode
              leg_flsh, 31);
 register!(intr_status, IntrStatus, RW, u32);
 register_bit!(intr_status, rx_overflow, 0);
 register_bit!(intr_status,
              /// < tx_thres
              tx_fifo_not_full, 2);
 register_bit!(intr_status, tx_fifo_full, 3);
 register_bit!(intr_status,
              /// >= rx_thres
              rx_fifo_not_empty, 4);
 register_bit!(intr_status, rx_fifo_full, 5);
 register_bit!(intr_status, tx_fifo_underflow, 6);
 register!(intr_en, IntrEn, WO, u32);
 register_bit!(intr_en, rx_overflow, 0);
 register_bit!(intr_en, tx_fifo_not_full, 2);
 register_bit!(intr_en, tx_fifo_full, 3);
 register_bit!(intr_en, rx_fifo_not_empty, 4);
 register_bit!(intr_en, rx_fifo_full, 5);
 register_bit!(intr_en, tx_fifo_underflow, 6);
 register!(intr_dis, IntrDis, WO, u32);
 register_bit!(intr_dis, rx_overflow, 0);
 register_bit!(intr_dis, tx_fifo_not_full, 2);
 register_bit!(intr_dis, tx_fifo_full, 3);
 register_bit!(intr_dis, rx_fifo_not_empty, 4);
 register_bit!(intr_dis, rx_fifo_full, 5);
 register_bit!(intr_dis, tx_fifo_underflow, 6);
 register!(enable, Enable, RW, u32);
 register_bit!(enable, spi_en, 0);
 // named to avoid confusion with normal gpio
 register!(qspi_gpio, QspiGpio, RW, u32);
 register_bit!(qspi_gpio,
              /// Write protect pin (inverted)
              wp_n, 0);
 register!(lqspi_cfg, LqspiCfg, RW, u32);
 register_bits!(lqspi_cfg, inst_code, u8, 0, 7);
 register_bits!(lqspi_cfg, dummy_mask, u8, 8, 10);
 register_bits!(lqspi_cfg, mode_bits, u8, 16, 23);
 register_bit!(lqspi_cfg, mode_on, 24);
 register_bit!(lqspi_cfg, mode_en, 25);
 register_bit!(lqspi_cfg, u_page, 28);
 register_bit!(lqspi_cfg, sep_bus, 29);
 register_bit!(lqspi_cfg, two_mem, 30);
 register_bit!(lqspi_cfg, lq_mode, 31);
--- a/libboard_zynq/src/flash/spi_flash_register.rs
+++ b/libboard_zynq/src/flash/spi_flash_register.rs
@ -1,62 +0,0 @@
 use bit_field::BitField;
 pub trait SpiFlashRegister {
    fn inst_code() -> u8;
    fn new(src: u8) -> Self;
 }
 macro_rules! u8_register {
    ($name: ident, $doc: tt, $inst_code: expr) => {
        #[derive(Clone)]
        #[doc=$doc]
        pub struct $name {
            pub inner: u8,
        }
        impl SpiFlashRegister for $name {
            fn inst_code() -> u8 {
                $inst_code
            }
            fn new(src: u8) -> Self {
                $name {
                    inner: src,
                }
            }
        }
        impl $name {
            #[allow(unused)]
            pub fn is_zeroed(&self) -> bool {
                self.inner == 0
            }
        }
    };
 }
 u8_register!(CR, "Configuration Register", 0x35);
 u8_register!(SR1, "Status Register-1", 0x05);
 impl SR1 {
    /// Write In Progress
    pub fn wip(&self) -> bool {
        self.inner.get_bit(0)
    }
    /// Write Enable Latch
    pub fn wel(&self) -> bool {
        self.inner.get_bit(1)
    }
    /// Erase Error Occurred
    pub fn e_err(&self) -> bool {
        self.inner.get_bit(5)
    }
    /// Programming Error Occurred
    pub fn p_err(&self) -> bool {
        self.inner.get_bit(6)
    }
 }
 u8_register!(SR2, "Status Register-2", 0x07);
 u8_register!(BA, "Bank Address Register", 0xB9);
--- a/libboard_zynq/src/flash/transfer.rs
+++ b/libboard_zynq/src/flash/transfer.rs
@ -1,125 +0,0 @@
 use libregister::{RegisterR, RegisterW, RegisterRW};
 use super::regs;
 use super::{SpiWord, Flash, Manual};
 pub struct Transfer<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> {
    flash: &'a mut Flash<Manual>,
    args: Args,
    sent: usize,
    received: usize,
    len: usize,
 }
 impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Transfer<'a, Args, W> {
    pub fn new(flash: &'a mut Flash<Manual>, args: Args, len: usize) -> Self {
        flash.regs.config.modify(|_, w| w.pcs(false));
        flash.regs.enable.write(
            regs::Enable::zeroed()
                .spi_en(true)
        );
        let mut xfer = Transfer {
            flash,
            args,
            sent: 0,
            received: 0,
            len,
        };
        xfer.fill_tx_fifo();
        xfer.flash.regs.config.modify(|_, w| w.man_start_com(true));
        xfer
    }
    fn fill_tx_fifo(&mut self) {
        while self.sent < self.len && !self.flash.regs.intr_status.read().tx_fifo_full() {
            let arg = self.args.next()
                .map(|n| n.into())
                .unwrap_or(SpiWord::W32(0));
            match arg {
                SpiWord::W32(w) => {
                    // println!("txd0 {:08X}", w);
                    unsafe {
                        self.flash.regs.txd0.write(w);
                    }
                    self.sent += 4;
                }
                // Only txd0 can be used without flushing
                _ => {
                    if !self.flash.regs.intr_status.read().tx_fifo_not_full() {
                        // Flush if necessary
                        self.flash.wait_tx_fifo_flush();
                    }
                    match arg {
                        SpiWord::W8(w) => {
                            // println!("txd1 {:02X}", w);
                            unsafe {
                                self.flash.regs.txd1.write(u32::from(w) << 24);
                            }
                            self.sent += 1;
                        }
                        SpiWord::W16(w) => {
                            unsafe {
                                self.flash.regs.txd2.write(u32::from(w) << 16);
                            }
                            self.sent += 2;
                        }
                        SpiWord::W24(w) => {
                            unsafe {
                                self.flash.regs.txd3.write(w << 8);
                            }
                            self.sent += 3;
                        }
                        SpiWord::W32(_) => unreachable!(),
                    }
                    self.flash.wait_tx_fifo_flush();
                }
            }
        }
    }
    fn can_read(&mut self) -> bool {
        self.flash.regs.intr_status.read().rx_fifo_not_empty()
    }
    fn read(&mut self) -> u32 {
        let rx = self.flash.regs.rx_data.read();
        self.received += 4;
        rx
    }
 }
 impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Drop for Transfer<'a, Args, W> {
    fn drop(&mut self) {
        // Discard remaining rx_data
        while self.can_read() {
            self.read();
        }
        // Stop
        self.flash.regs.enable.write(
            regs::Enable::zeroed()
                .spi_en(false)
        );
        self.flash.regs.config.modify(|_, w| w
            .pcs(true)
            .man_start_com(false)
        );
    }
 }
 impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Iterator for Transfer<'a, Args, W> {
    type Item = u32;
    fn next<'s>(&'s mut self) -> Option<u32> {
        if self.received >= self.len {
            return None;
        }
        self.fill_tx_fifo();
        while !self.can_read() {}
        Some(self.read())
    }
 }
--- a/libboard_zynq/src/gic.rs
+++ b/libboard_zynq/src/gic.rs
@ -0,0 +1,150 @@
 //! ARM Generic Interrupt Controller
 use bit_field::BitField;
 use libregister::{RegisterW, RegisterRW, RegisterR};
 use super::mpcore;
 #[derive(Debug, Clone, Copy)]
 pub struct InterruptId(pub u8);
 #[derive(Debug, Clone, Copy)]
 #[repr(u8)]
 pub enum CPUCore {
    Core0 = 0b01,
    Core1 = 0b10
 }
 #[derive(Debug, Clone, Copy)]
 pub struct TargetCPU(u8);
 impl TargetCPU {
    pub const fn none() -> TargetCPU {
        TargetCPU(0)
    }
    pub const fn and(self, other: TargetCPU) -> TargetCPU {
        TargetCPU(self.0 | other.0)
    }
 }
 impl From<CPUCore> for TargetCPU {
    fn from(core: CPUCore) -> Self {
        TargetCPU(core as u8)
    }
 }
 pub enum TargetList {
    CPUList(TargetCPU),
    Others,
    This
 }
 impl From<CPUCore> for TargetList {
    fn from(core: CPUCore) -> Self {
        TargetList::CPUList(TargetCPU(core as u8))
    }
 }
 impl From<TargetCPU> for TargetList {
    fn from(cpu: TargetCPU) -> Self {
        TargetList::CPUList(cpu)
    }
 }
 #[derive(Debug, Clone, Copy)]
 pub enum InterruptSensitivity {
    Level,
    Edge,
 }
 pub struct InterruptController {
    mpcore: &'static mut mpcore::RegisterBlock,
 }
 impl InterruptController {
    pub fn gic(mpcore: &'static mut mpcore::RegisterBlock) -> Self {
        InterruptController { mpcore }
    }
    pub fn disable_interrupts(&mut self) {
        self.mpcore.iccicr.modify(|_, w| w.enable_ns(false)
                                          .enable_s(false));
        // FIXME: Should we disable the distributor globally when we disable interrupt (for a single
        // core)?
        // self.mpcore.icddcr.modify(|_, w| w.enable_secure(false)
        //                                   .enable_non_secure(false));
    }
    /// enable interrupt signaling
    pub fn enable_interrupts(&mut self) {
        self.mpcore.iccicr.modify(|_, w| w.enable_ns(true)
                                          .enable_s(true));
        self.mpcore.icddcr.modify(|_, w| w.enable_secure(true));
        // Enable all interrupts except those of the lowest priority.
        self.mpcore.iccpmr.write(mpcore::ICCPMR::zeroed().priority(0xFF));
    }
    /// send software generated interrupt
    pub fn send_sgi(&mut self, id: InterruptId, targets: TargetList) {
        assert!(id.0 < 16);
        self.mpcore.icdsgir.modify(|_, w| match targets {
            TargetList::CPUList(list) => w.target_list_filter(0).cpu_target_list(list.0),
            TargetList::Others => w.target_list_filter(0b01),
            TargetList::This => w.target_list_filter(0b10)
        }.sgiintid(id.0).satt(false));
    }
    /// enable the interrupt *for this core*.
    /// Not needed for SGI.
    pub fn enable(&mut self, id: InterruptId, target_cpu: CPUCore, sensitivity: InterruptSensitivity, priority: u8) {
        // only 5 bits of the priority is useful
        assert!(priority < 32);
        self.disable_interrupts();
        // enable
        let m = (id.0 >> 5) as usize;
        let n = (id.0 & 0x1F) as usize;
        assert!(m < 3);
        unsafe {
            self.mpcore.icdiser[m].modify(|mut icdiser| *icdiser.set_bit(n, true));
        }
        // target cpu
        let m = (id.0 >> 2) as usize;
        let n = (8 * (id.0 & 3)) as usize;
        unsafe {
            self.mpcore.icdiptr[m].modify(|mut icdiptr| *icdiptr.set_bits(n..=n+1, target_cpu as u32));
        }
        // sensitivity
        let m = (id.0 >> 4) as usize;
        let n = (2 * (id.0 & 0xF)) as usize;
        unsafe {
            self.mpcore.icdicfr[m].modify(|mut icdicfr| *icdicfr.set_bits(n..=n+1, match sensitivity {
                InterruptSensitivity::Level => 0b00,
                InterruptSensitivity::Edge  => 0b10,
            }));
        }
        // priority
        let offset = (id.0 % 4) * 8;
        let priority: u32 = (priority as u32) << (offset + 3);
        let mask: u32 = 0xFFFFFFFF ^ (0xFF << offset);
        unsafe {
            self.mpcore.icdipr[id.0 as usize / 4].modify(|v| (v & mask) | priority);
        }
        self.enable_interrupts();
    }
    pub fn end_interrupt(&mut self, id: InterruptId) {
        self.mpcore.icceoir.modify(|_, w| w.eoiintid(id.0 as u32));
    }
    pub fn get_interrupt_id(&self) -> InterruptId {
        InterruptId(self.mpcore.icciar.read().ackintid() as u8)
    }
 }
--- a/libboard_zynq/src/i2c/eeprom.rs
+++ b/libboard_zynq/src/i2c/eeprom.rs
@ -0,0 +1,130 @@
 use super::I2c;
 use crate::time::Milliseconds;
 use embedded_hal::timer::CountDown;
 pub struct EEPROM<'a> {
    i2c: &'a mut I2c,
    #[cfg(not(feature = "target_ebaz4205"))]
    port: u8,
    address: u8,
    page_size: u8,
    count_down: crate::timer::global::CountDown<Milliseconds>
 }
 impl<'a> EEPROM<'a> {
    #[cfg(feature = "target_zc706")]
    pub fn new(i2c: &'a mut I2c, page_size: u8) -> Self {
        EEPROM {
            i2c: i2c,
            port: 2,
            address: 0b1010100,
            page_size: page_size,
            count_down: unsafe { crate::timer::GlobalTimer::get() }.countdown()
        }
    }
    #[cfg(feature = "target_kasli_soc")]
    pub fn new(i2c: &'a mut I2c, page_size: u8) -> Self {
        EEPROM {
            i2c: i2c,
            port: 3,
            address: 0x57,
            page_size: page_size,
            count_down: unsafe { crate::timer::GlobalTimer::get() }.countdown()
        }
    }
    #[cfg(feature = "target_zc706")]
    fn select(&mut self) -> Result<(), &'static str> {
        self.i2c.pca954x_select(0b1110100, Some(self.port))?;
        Ok(())
    }
    #[cfg(feature = "target_kasli_soc")]
    fn select(&mut self) -> Result<(), &'static str> {
        // tca9548 is compatible with pca9548
        self.i2c.pca954x_select(0b1110001, Some(self.port))?;
        Ok(())
    }
    #[cfg(feature = "target_ebaz4205")]
    fn select(&mut self) -> Result<(), &'static str> {
        Ok(())
    }
    /// Random read
    pub fn read<'r>(&mut self, addr: u8, buf: &'r mut [u8]) -> Result<(), &'static str> {
        self.select()?;
        self.i2c.start()?;
        self.i2c.write(self.address << 1)?;
        self.i2c.write(addr)?;
        self.i2c.restart()?;
        self.i2c.write((self.address << 1) | 1)?;
        let buf_len = buf.len();
        for (i, byte) in buf.iter_mut().enumerate() {
            *byte = self.i2c.read(i < buf_len - 1)?;
        }
        self.i2c.stop()?;
        Ok(())
    }
    /// Smart multi-page writing
    /// Using the "Page Write" function of an EEPROM, the memory region for each transaction
    /// (i.e. from byte `addr` to byte `addr+buf.len()`) should fit under each page 
    /// (i.e. `addr+buf.len()` < `addr/self.page_size+1`); otherwise, a roll-oever occurs, 
    /// where bytes beyond the page end. This smart function takes care of the scenario to avoid
    /// any roll-over when writing ambiguous memory regions.
    pub fn write(&mut self, addr: u8, buf: &[u8]) -> Result<(), &'static str> {
        self.select()?;
        let buf_len = buf.len();
        let mut pb: u8 = addr % self.page_size;
        for (i, byte) in buf.iter().enumerate() {
            if (i == 0) || (pb == 0) {
                self.i2c.start()?;
                self.i2c.write(self.address << 1)?;
                self.i2c.write(addr + (i as u8))?;
            }
            self.i2c.write(*byte)?;
            pb += 1;
            if (i == buf_len-1) || (pb == self.page_size) {
                self.i2c.stop()?;
                self.poll(1_000)?;
                pb = 0;
            }
        }
        Ok(())
    }
    /// Poll
    pub fn poll(&mut self, timeout_ms: u64) -> Result<(), &'static str> {
        self.select()?;
        self.count_down.start(Milliseconds(timeout_ms));
        loop {
            self.i2c.start()?;
            let ack = self.i2c.write(self.address << 1)?;
            self.i2c.stop()?;
            if ack {
                break
            };
            if !self.count_down.waiting() {
                return Err("I2C polling timeout")
            }
        }
        Ok(())
    }
    pub fn read_eui48<'r>(&mut self) -> Result<[u8; 6], &'static str> {
        let mut buffer = [0u8; 6];
        self.read(0xFA, &mut buffer)?;
        Ok(buffer)
    }
 }
--- a/libboard_zynq/src/i2c/mod.rs
+++ b/libboard_zynq/src/i2c/mod.rs
@ -0,0 +1,336 @@
 //! I2C Bit-banging Controller
 mod regs;
 pub mod eeprom;
 #[cfg(not(feature = "target_ebaz4205"))]
 use super::slcr;
 use super::time::Microseconds;
 use embedded_hal::timer::CountDown;
 use libregister::{RegisterR, RegisterRW};
 #[cfg(not(feature = "target_ebaz4205"))]
 use libregister::RegisterW;
 #[cfg(feature = "target_kasli_soc")]
 use log::info;
 pub enum I2cMultiplexer {
    PCA9548 = 0,
    #[cfg(feature = "target_kasli_soc")]
    PCA9547 = 1,
 }
 pub struct I2c {
    regs: regs::RegisterBlock,
    count_down: super::timer::global::CountDown<Microseconds>,
    pca_type: I2cMultiplexer
 }
 impl I2c {
    #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
    pub fn i2c0() -> Self {
        // Route I2C 0 SCL / SDA Signals to MIO Pins 50 / 51
        #[cfg(not(feature = "target_ebaz4205"))]
        slcr::RegisterBlock::unlocked(|slcr| {
            // SCL
            slcr.mio_pin_50.write(
                slcr::MioPin50::zeroed()
                    .l3_sel(0b000)  // as GPIO 50
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
                    .disable_rcvr(true)
            );
            // SDA
            slcr.mio_pin_51.write(
                slcr::MioPin51::zeroed()
                    .l3_sel(0b000)  // as GPIO 51
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
                    .disable_rcvr(true)
            );
            // On Kasli-SoC prototype, leakage through the unconfigured I2C_SW_RESET
            // MIO pin develops enough voltage on the T21 gate to assert the reset.
            // Configure the pin to avoid this problem.
            #[cfg(feature = "target_kasli_soc")]
            slcr.mio_pin_33.write(
                slcr::MioPin33::zeroed()
                    .l3_sel(0b000)
                    .io_type(slcr::IoBufferType::Lvcmos33)
                    .pullup(false)
                    .disable_rcvr(true)
            );
        });
        Self::i2c_common(0xFFFF - 0x000C, 0xFFFF - 0x0002)
    }
    fn i2c_common(gpio_output_mask: u16, _gpio_output_mask_lower: u16) -> Self {
        // Setup register block
        let self_ = Self {
            regs: regs::RegisterBlock::i2c(),
            count_down: unsafe { super::timer::GlobalTimer::get() }.countdown(),
            pca_type: I2cMultiplexer::PCA9548 //default for zc706
        };
        // Setup GPIO output mask
        self_.regs.gpio_output_mask.modify(|_, w| {
            w.mask(gpio_output_mask)
        });
        // Setup GPIO driver direction
        self_.regs.gpio_direction.modify(|_, w| {
            w.scl(true).sda(true)
        });
        //Kasli-SoC only: I2C_SW_RESET configuration
        #[cfg(feature = "target_kasli_soc")]
        {
            self_.regs.gpio_output_mask_lower.modify(|_, w| {
                w.mask(_gpio_output_mask_lower)
            });
            self_.regs.gpio_direction.modify(|_, w| {
                w.i2cswr(true)
            });
        }
        self_
    }
    /// Delay for I2C operations, simple wrapper for nb.
    fn delay_us(&mut self, us: u64) {
        self.count_down.start(Microseconds(us));
        nb::block!(self.count_down.wait()).unwrap();
    }
    fn unit_delay(&mut self) { self.delay_us(100) }
    fn sda_i(&mut self) -> bool {
        self.regs.gpio_input.read().sda()
    }
    fn scl_i(&mut self) -> bool {
        self.regs.gpio_input.read().scl()
    }
    fn sda_oe(&mut self, oe: bool) {
        self.regs.gpio_output_enable.modify(|_, w| {
             w.sda(oe)
        })
    }
    fn sda_o(&mut self, o: bool) {
        self.regs.gpio_output_mask.modify(|_, w| {
             w.sda_o(o)
        })
    }
    fn scl_oe(&mut self, oe: bool) {
        self.regs.gpio_output_enable.modify(|_, w| {
             w.scl(oe)
        })
    }
    fn scl_o(&mut self, o: bool) {
        self.regs.gpio_output_mask.modify(|_, w| {
             w.scl_o(o)
        })
    }
    #[cfg(feature = "target_kasli_soc")]
    fn i2cswr_oe(&mut self, oe: bool) {
        self.regs.gpio_output_enable.modify(|_, w| {
             w.i2cswr(oe)
        })
    }
    #[cfg(feature = "target_kasli_soc")]
    fn i2cswr_o(&mut self, o: bool) {
        self.regs.gpio_output_mask_lower.modify(|_, w| {
             w.i2cswr_o(o)
        })
    }
    #[cfg(feature = "target_kasli_soc")]
    fn pca_autodetect(&mut self) -> Result<I2cMultiplexer, &'static str> {
        // start with resetting the PCA954X
        // SDA must be clear (before start)
        // reset time is 500ns, unit_delay (100us) to account for propagation
        self.i2cswr_o(true);
        self.unit_delay();
        self.i2cswr_o(false);
        self.unit_delay();
        let pca954x_read_addr = (0x71 << 1) | 0x01;
        self.start()?;
        // read the config register
        if !self.write(pca954x_read_addr)? {
            return Err("PCA954X failed to ack read address");
        }
        let config = self.read(false)?;
        let pca = match config {
            0x00 => { info!("PCA9548 detected"); I2cMultiplexer::PCA9548 },
            0x08 => { info!("PCA9547 detected"); I2cMultiplexer::PCA9547 },
            _ => { return Err("Unknown response for PCA954X autodetect")},
        };
        self.stop()?;
        Ok(pca)
    }
    pub fn init(&mut self) -> Result<(), &'static str> {
        self.scl_oe(false);
        self.sda_oe(false);
        self.scl_o(false);
        self.sda_o(false);
        // Check the I2C bus is ready
        self.unit_delay();
        self.unit_delay();
        if !self.sda_i() {
            // Try toggling SCL a few times
            for _bit in 0..8 {
                self.scl_oe(true);
                self.unit_delay();
                self.scl_oe(false);
                self.unit_delay();
            }
        }
        if !self.sda_i() {
            return Err("SDA is stuck low and doesn't get unstuck");
        }
        if !self.scl_i() {
            return Err("SCL is stuck low");
        }
        // postcondition: SCL and SDA high
        #[cfg(feature = "target_kasli_soc")]
        {
            self.i2cswr_oe(true);
            self.pca_type = self.pca_autodetect()?;
        }
        Ok(())
    }
    pub fn start(&mut self) -> Result<(), &'static str> {
        // precondition: SCL and SDA high
        if !self.scl_i() {
            return Err("SCL is stuck low");
        }
        if !self.sda_i() {
            return Err("SDA arbitration lost");
        }
        self.sda_oe(true);
        self.unit_delay();
        self.scl_oe(true);
        self.unit_delay();
        // postcondition: SCL and SDA low
        Ok(())
    }
    pub fn restart(&mut self) -> Result<(), &'static str> {
        // precondition SCL and SDA low
        self.sda_oe(false);
        self.unit_delay();
        self.scl_oe(false);
        self.unit_delay();
        self.start()?;
        // postcondition: SCL and SDA low
        Ok(())
    }
    pub fn stop(&mut self) -> Result<(), &'static str> {
        // precondition: SCL and SDA low
        self.unit_delay();
        self.scl_oe(false);
        self.unit_delay();
        self.sda_oe(false);
        self.unit_delay();
        if !self.sda_i() {
            return Err("SDA arbitration lost");
        }
        // postcondition: SCL and SDA high
        Ok(())
    }
    pub fn write(&mut self, data: u8) -> Result<bool, &'static str> {
        // precondition: SCL and SDA low
        // MSB first
        for bit in (0..8).rev() {
            self.sda_oe(data & (1 << bit) == 0);
            self.unit_delay();
            self.scl_oe(false);
            self.unit_delay();
            self.scl_oe(true);
            self.unit_delay();
        }
        self.sda_oe(false);
        self.unit_delay();
        self.scl_oe(false);
        self.unit_delay();
        // Read ack/nack
        let ack = !self.sda_i();
        self.scl_oe(true);
        self.unit_delay();
        self.sda_oe(true);
        // postcondition: SCL and SDA low
        Ok(ack)
    }
    pub fn read(&mut self, ack: bool) -> Result<u8, &'static str> {
        // precondition: SCL and SDA low
        self.sda_oe(false);
        let mut data: u8 = 0;
        // MSB first
        for bit in (0..8).rev() {
            self.unit_delay();
            self.scl_oe(false);
            self.unit_delay();
            if self.sda_i() { data |= 1 << bit }
            self.scl_oe(true);
        }
        // Send ack/nack (true = nack, false = ack)
        self.sda_oe(ack);
        self.unit_delay();
        self.scl_oe(false);
        self.unit_delay();
        self.scl_oe(true);
        self.sda_oe(true);
        // postcondition: SCL and SDA low
        Ok(data)
    }
    pub fn pca954x_select(&mut self, address: u8, channel: Option<u8>) -> Result<(), &'static str> {
        self.start()?;
        // PCA9547 supports only one channel at a time
        // for compatibility, PCA9548 is treated as such too
        // channel - Some(x) - # of the channel [0,7], or None for all disabled
        let setting = match self.pca_type {
            I2cMultiplexer::PCA9548 => { 
                match channel {
                    Some(ch) => 1 << ch,
                    None => 0,
                }
            },
            #[cfg(feature = "target_kasli_soc")]
            I2cMultiplexer::PCA9547 => {
                match channel {
                    Some(ch) => ch | 0x08,
                    None => 0,
                }
            }
        };
        if !self.write(address << 1)? {
            return Err("PCA954X failed to ack write address")
        }
        if !self.write(setting)? {
            return Err("PCA954X failed to ack control word")
        }
        self.stop()?;
        Ok(())
    }
 }
--- a/libboard_zynq/src/i2c/regs.rs
+++ b/libboard_zynq/src/i2c/regs.rs
@ -0,0 +1,135 @@
 use libregister::{
    register, register_at,
    register_bit, register_bits
 };
 // With reference to:
 //
 // artiq:artiq/gateware/targets/kasli.py:
 // self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
 //
 // misoc:misoc/cores/gpio.py:
 // class GPIOTristate(Module, AutoCSR):
 //    def __init__(self, signals, reset_out=0, reset_oe=0):
 //        l = len(signals)
 //        self._in = CSRStatus(l)
 //        self._out = CSRStorage(l, reset=reset_out)
 //        self._oe = CSRStorage(l, reset=reset_oe)
 // 
 // Hence, using GPIOs as SCL and SDA GPIOs respectively.
 //
 // Current compatibility:
 // zc706: GPIO 50, 51 == SCL, SDA
 // kasli_soc: GPIO 50, 51 == SCL, SDA; GPIO 33 == I2C_SW_RESET
 // ebaz4205: GPIO (EMIO)
 pub struct RegisterBlock {
    pub gpio_output_mask: &'static mut GPIOOutputMask,
    pub gpio_input: &'static mut GPIOInput,
    pub gpio_direction: &'static mut GPIODirection,
    pub gpio_output_enable: &'static mut GPIOOutputEnable,
    #[cfg(feature = "target_kasli_soc")]
    pub gpio_output_mask_lower: &'static mut GPIOOutputMaskLower,
 }
 impl RegisterBlock {
    pub fn i2c() -> Self {
        Self {
            gpio_output_mask: GPIOOutputMask::new(),
            gpio_input: GPIOInput::new(),
            gpio_direction: GPIODirection::new(),
            gpio_output_enable: GPIOOutputEnable::new(),
            #[cfg(feature = "target_kasli_soc")]
            gpio_output_mask_lower: GPIOOutputMaskLower::new(),
        }
    }
 }
 register!(gpio_output_mask,
          /// MASK_DATA_1_MSW:
          /// Maskable output data for MIO[53:48]
          GPIOOutputMask, RW, u32);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_at!(GPIOOutputMask, 0xE000A00C, new);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_output_mask,
              /// Output for SCL
              scl_o, 2);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_output_mask,
              /// Output for SDA
              sda_o, 3);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bits!(gpio_output_mask,
               /// Mask for keeping bits except SCL and SDA unchanged
               mask, u16, 16, 31);
 register!(gpio_output_mask_lower,
            /// MASK_DATA_1_LSW:
            /// Maskable output data for MIO[47:32]
            GPIOOutputMaskLower, RW, u32);
 #[cfg(feature = "target_kasli_soc")]
 register_at!(GPIOOutputMaskLower, 0xE000A008, new);
 #[cfg(feature = "target_kasli_soc")]
 register_bit!(gpio_output_mask_lower,
              /// Output for I2C_SW_RESET (MIO[33])
              i2cswr_o, 1);
 #[cfg(feature = "target_kasli_soc")]
 register_bits!(gpio_output_mask_lower,
               mask, u16, 16, 31);
 register!(gpio_input,
          /// DATA_1_RO:
          /// Input data for MIO[53:32]
          GPIOInput, RO, u32);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_at!(GPIOInput, 0xE000A064, new);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_input,
              /// Input for SCL
              scl, 18);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_input,
              /// Input for SDA
              sda, 19);
 register!(gpio_direction,
          /// DIRM_1:
          /// Direction mode for MIO[53:32]; 0/1 = in/out
          GPIODirection, RW, u32);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_at!(GPIODirection, 0xE000A244, new);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_direction,
              /// Direction for SCL
              scl, 18);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_direction,
              /// Direction for SDA
              sda, 19);
 #[cfg(feature = "target_kasli_soc")]
 register_bit!(gpio_direction,
              /// Direction for I2C_SW_RESET
              i2cswr, 1);
 register!(gpio_output_enable,
          /// OEN_1:
          /// Output enable for MIO[53:32]
          GPIOOutputEnable, RW, u32);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_at!(GPIOOutputEnable, 0xE000A248, new);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_output_enable,
              /// Output enable for SCL
              scl, 18);
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 register_bit!(gpio_output_enable,
              /// Output enable for SDA
              sda, 19);
 #[cfg(feature = "target_kasli_soc")]
 register_bit!(gpio_output_enable,
              /// Output enable for I2C_SW_RESET
              i2cswr, 1);
--- a/libboard_zynq/src/lib.rs
+++ b/libboard_zynq/src/lib.rs
@ -15,37 +15,13 @@ pub mod axi_hp;
 pub mod axi_gp;
 pub mod ddr;
 pub mod mpcore;
-pub mod flash;
+pub mod gic;
 pub mod dmac;
 pub mod time;
 pub mod timer;
 pub mod sdio;
 #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
 pub mod i2c;
 pub mod logger;
-
+pub mod ps7_init;
-pub use libcortex_a9::pl310::L2Cache;
+#[cfg(feature="target_kasli_soc")]
-
+pub mod error_led;
 pub fn l2cache() -> L2Cache {
    const PL310_BASEADDR: usize = 0xF8F02000;
    L2Cache::new(PL310_BASEADDR)
 }
 pub fn setup_l2cache() {
    slcr::RegisterBlock::unlocked(|slcr| {
        assert_eq!(&slcr.unnamed1 as *const _ as u32, 0xF8000A1C);
        unsafe { slcr.unnamed1.write(0x020202); }
    });
    let mut l2 = l2cache();
    use log::info;
    info!("l2 aux={:08X}", l2.regs.aux_control.read());
    // TODO: set prefetch
    // Configure ZYNQ-specific latency
    l2.set_tag_ram_latencies(1, 1, 1);
    l2.set_data_ram_latencies(1, 2, 1);
    l2.disable_interrupts();
    l2.reset_interrupts();
    l2.invalidate_all();
    l2.enable();
 }
--- a/libboard_zynq/src/logger.rs
+++ b/libboard_zynq/src/logger.rs
@ -19,7 +19,7 @@ impl log::Log for Logger {
        if self.enabled(record.metadata()) {
            let timestamp = unsafe {
                GlobalTimer::get()
-            }.get_us();
+            }.get_us().0;
            let seconds   = timestamp / 1_000_000;
            let micros    = timestamp % 1_000_000;
--- a/libboard_zynq/src/mpcore.rs
+++ b/libboard_zynq/src/mpcore.rs
@ -8,47 +8,140 @@ use libregister::{
 #[repr(C)]
 pub struct RegisterBlock {
    /// SCU Control Register
    pub scu_control: ScuControl,
-    pub scu_config: RO<u32>,
+    /// SCU Configuration Register
-    pub scu_cpu_power: RW<u32>,
+    pub scu_config: ScuConfig,
    /// SCU CPU Power Status Register
    pub scu_cpu_power_status: SCUCPUPowerStatusRegister,
    /// SCU Invalidate All Registers in Secure State
    pub scu_invalidate: ScuInvalidate,
-    reserved0: [u32; 12],
+    unused0: [u32; 12],
-    pub filter_start: RW<u32>,
+    /// Filtering Start Address Register
-    pub filter_end: RW<u32>,
+    pub filtering_start_address: FilteringStartAddressRegister,
-    reserved1: [u32; 2],
+    /// Defined by FILTEREND input
-    pub scu_access_control: RW<u32>,
+    pub filtering_end_address: FilteringEndAddressRegister,
-    pub scu_non_secure_access_control: RW<u32>,
+    unused1: [u32; 2],
-    reserved2: [u32; 42],
+    /// SCU Access Control (SAC) Register
-    pub iccicr: RW<u32>,
+    pub scu_access_control_sac: SCUAccessControlRegisterSAC,
-    pub iccpmw: RW<u32>,
+    /// SCU Non-secure Access Control Register SNSAC
-    pub iccbpr: RW<u32>,
+    pub scu_non_secure_access_control: SCUNonSecureAccessControlRegister,
-    pub icciar: RW<u32>,
+    unused2: [u32; 42],
-    pub icceoir: RW<u32>,
+    /// CPU Interface Control Register
-    pub iccrpr: RW<u32>,
+    pub iccicr: ICCICR,
-    pub icchpir: RW<u32>,
+    /// Interrupt Priority Mask Register
-    pub iccabpr: RW<u32>,
+    pub iccpmr: ICCPMR,
-    reserved3: [u32; 55],
+    /// Binary Point Register
-    pub iccidr: RW<u32>,
+    pub iccbpr: ICCBPR,
    /// Interrupt Acknowledge Register
    pub icciar: ICCIAR,
    /// End Of Interrupt Register
    pub icceoir: ICCEOIR,
    /// Running Priority Register
    pub iccrpr: ICCRPR,
    /// Highest Pending Interrupt Register
    pub icchpir: ICCHPIR,
    /// Aliased Non-secure Binary Point Register
    pub iccabpr: ICCABPR,
    unused3: [u32; 55],
    /// CPU Interface Implementer Identification Register
    pub iccidr: ICCIDR,
    /// Global Timer Counter Register 0
    pub global_timer_counter0: ValueRegister,
    pub global_timer_counter1: ValueRegister,
    /// Global Timer Control Register
    pub global_timer_control: GlobalTimerControl,
-    pub global_timer_interrupt_status: RW<u32>,
+    /// Global Timer Interrupt Status Register
    pub global_timer_interrupt_status: GlobalTimerInterruptStatusRegister,
    /// Comparator Value Register_0
    pub comparator_value0: ValueRegister,
    pub comparator_value1: ValueRegister,
-    pub auto_increment: ValueRegister,
+    /// Auto-increment Register
-    reserved4: [u32; 249],
+    pub auto_increment: RW<u32>,
-    pub private_timer_load: ValueRegister,
+    unused4: [u32; 249],
-    pub private_timer_counter: ValueRegister,
+    /// Private Timer Load Register
-    pub private_timer_control: RW<u32>,
+    pub private_timer_load: RW<u32>,
-    pub private_timer_interrupt_status: RW<u32>,
+    /// Private Timer Counter Register
-    reserved5: [u32; 4],
+    pub private_timer_counter: RW<u32>,
-    pub watchdog_load: ValueRegister,
+    /// Private Timer Control Register
-    pub watchdog_counter: ValueRegister,
+    pub private_timer_control: PrivateTimerControlRegister,
-    pub watchdog_control: RW<u32>,
+    /// Private Timer Interrupt Status Register
-    pub watchdog_interrupt_status: RW<u32>,
+    pub private_timer_interrupt_status: PrivateTimerInterruptStatusRegister,
-    // there is plenty more (unimplemented)
+    unused5: [u32; 4],
    /// Watchdog Load Register
    pub watchdog_load: RW<u32>,
    /// Watchdog Counter Register
    pub watchdog_counter: RW<u32>,
    /// Watchdog Control Register
    pub watchdog_control: WatchdogControlRegister,
    /// Watchdog Interrupt Status Register
    pub watchdog_interrupt_status: WatchdogInterruptStatusRegister,
    /// Watchdog Reset Status Register
    pub watchdog_reset_status: WatchdogResetStatusRegister,
    /// Watchdog Disable Register
    pub watchdog_disable: RW<u32>,
    unused6: [u32; 626],
    /// Distributor Control Register
    pub icddcr: ICDDCR,
    /// Interrupt Controller Type Register
    pub icdictr: ICDICTR,
    /// Distributor Implementer Identification Register
    pub icdiidr: ICDIIDR,
    unused7: [u32; 29],
    /// Interrupt Security Register
    pub icdisr0: RW<u32>,
    pub icdisr1: RW<u32>,
    pub icdisr2: RW<u32>,
    unused8: [u32; 29],
    /// Interrupt Set-enable Registers
    pub icdiser: [RW<u32>; 3],
    unused9: [u32; 29],
    /// Interrupt Clear-Enable Register 0
    pub icdicer0: RW<u32>,
    /// Interrupt Clear-Enable Register 1
    pub icdicer1: RW<u32>,
    /// Interrupt Clear-Enable Register 2
    pub icdicer2: RW<u32>,
    unused10: [u32; 29],
    /// Interrupt Set-pending Register
    pub icdispr0: RW<u32>,
    pub icdispr1: RW<u32>,
    pub icdispr2: RW<u32>,
    unused11: [u32; 29],
    /// Interrupt Clear-Pending Register
    pub icdicpr0: RW<u32>,
    pub icdicpr1: RW<u32>,
    pub icdicpr2: RW<u32>,
    unused12: [u32; 29],
    /// Active Bit register
    pub icdabr0: RW<u32>,
    pub icdabr1: RW<u32>,
    pub icdabr2: RW<u32>,
    unused13: [u32; 61],
    /// Interrupt Priority Register
    pub icdipr: [RW<u32>; 24],
    unused14: [u32; 232],
    /// Interrupt Processor Targets Registers
    pub icdiptr: [RW<u32>; 24],
    unused15: [u32; 232],
    /// Interrupt Configuration Registers
    pub icdicfr: [RW<u32>; 6],
    unused16: [u32; 58],
    /// PPI Status Register
    pub ppi_status: PpiStatus,
    /// SPI Status Register 0
    pub spi_status_0: RO<u32>,
    /// SPI Status Register 1
    pub spi_status_1: RO<u32>,
    unused17: [u32; 125],
    /// Software Generated Interrupt Register
    pub icdsgir: ICDSGIR,
 }
-register_at!(RegisterBlock, 0xF8F00000, new);
+
 register_at!(RegisterBlock, 0xF8F00000, mpcore);
 register!(value_register, ValueRegister, RW, u32);
 register_bits!(value_register, value, u32, 0, 31);
 register!(scu_control, ScuControl, RW, u32);
 register_bit!(scu_control, ic_standby_enable, 6);
@ -61,10 +154,21 @@ register_bit!(scu_control, enable, 0);
 impl ScuControl {
    pub fn start(&mut self) {
-        self.modify(|_, w| w.enable(true));
+        self.modify(|_, w| w.enable(true).scu_speculative_linefill_enable(true));
    }
 }
 register!(scu_config, ScuConfig, RO, u32);
 register_bits!(scu_config, tag_ram_sizes, u8, 8, 15);
 register_bits!(scu_config, cpus_smp, u8, 4, 7);
 register_bits!(scu_config, cpu_number, u8, 0, 1);
 register!(scu_cpu_power_status, SCUCPUPowerStatusRegister, RW, u32);
 register_bits!(scu_cpu_power_status, cpu3_status, u8, 24, 25);
 register_bits!(scu_cpu_power_status, cpu2_status, u8, 16, 17);
 register_bits!(scu_cpu_power_status, cpu1_status, u8, 8, 9);
 register_bits!(scu_cpu_power_status, cpu0_status, u8, 0, 1);
 register!(scu_invalidate, ScuInvalidate, WO, u32);
 register_bits!(scu_invalidate, cpu0_ways, u8, 0, 3);
 register_bits!(scu_invalidate, cpu1_ways, u8, 4, 7);
@ -88,8 +192,71 @@ impl ScuInvalidate {
    }
 }
-register!(value_register, ValueRegister, RW, u32);
+register!(filtering_start_address, FilteringStartAddressRegister, RW, u32);
-register_bits!(value_register, value, u32, 0, 31);
+register_bits!(filtering_start_address, filtering_start_address, u32, 20, 31);
 register_bits!(filtering_start_address, sbz, u32, 0, 19);
 register!(filtering_end_address, FilteringEndAddressRegister, RW, u32);
 register_bits!(filtering_end_address, filtering_end_address, u32, 20, 31);
 register_bits!(filtering_end_address, sbz, u32, 0, 19);
 register!(scu_access_control_sac, SCUAccessControlRegisterSAC, RW, u32);
 register_bit!(scu_access_control_sac, cp_u3, 3);
 register_bit!(scu_access_control_sac, cp_u2, 2);
 register_bit!(scu_access_control_sac, cp_u1, 1);
 register_bit!(scu_access_control_sac, cp_u0, 0);
 register!(scu_non_secure_access_control, SCUNonSecureAccessControlRegister, RO, u32);
 register_bits!(scu_non_secure_access_control, sbz, u32, 12, 31);
 register_bit!(scu_non_secure_access_control, cpu3_global_timer, 11);
 register_bit!(scu_non_secure_access_control, cpu2_global_timer, 10);
 register_bit!(scu_non_secure_access_control, cpu1_global_timer, 9);
 register_bit!(scu_non_secure_access_control, cpu0_global_timer, 8);
 register_bit!(scu_non_secure_access_control, private_timers_for_cpu3, 7);
 register_bit!(scu_non_secure_access_control, private_timers_for_cpu2, 6);
 register_bit!(scu_non_secure_access_control, private_timers_for_cpu1, 5);
 register_bit!(scu_non_secure_access_control, private_timers_for_cpu0, 4);
 register_bit!(scu_non_secure_access_control, component_access_for_cpu3, 3);
 register_bit!(scu_non_secure_access_control, component_access_for_cpu2, 2);
 register_bit!(scu_non_secure_access_control, component_access_for_cpu1, 1);
 register_bit!(scu_non_secure_access_control, component_access_for_cpu0, 0);
 register!(iccicr, ICCICR, RW, u32);
 register_bit!(iccicr, sbpr, 4);
 register_bit!(iccicr, fiq_en, 3);
 register_bit!(iccicr, ack_ctl, 2);
 register_bit!(iccicr, enable_ns, 1);
 register_bit!(iccicr, enable_s, 0);
 register!(iccpmr, ICCPMR, RW, u32);
 register_bits!(iccpmr, priority, u8, 0, 7);
 register!(iccbpr, ICCBPR, RW, u32);
 register_bits!(iccbpr, binary_point, u8, 0, 2);
 register!(icciar, ICCIAR, RW, u32);
 register_bits!(icciar, cpuid, u8, 10, 12);
 register_bits!(icciar, ackintid, u32, 0, 9);
 register!(icceoir, ICCEOIR, RW, u32);
 register_bits!(icceoir, cpuid, u8, 10, 12);
 register_bits!(icceoir, eoiintid, u32, 0, 9);
 register!(iccrpr, ICCRPR, RW, u32);
 register_bits!(iccrpr, priority, u8, 0, 7);
 register!(icchpir, ICCHPIR, RW, u32);
 register_bits!(icchpir, cpuid, u8, 10, 12);
 register_bits!(icchpir, pendintid, u32, 0, 9);
 register!(iccabpr, ICCABPR, RW, u32);
 register_bits!(iccabpr, binary_point, u8, 0, 2);
 register!(iccidr, ICCIDR, RO, u32);
 register_bits!(iccidr, part_number, u32, 20, 31);
 register_bits!(iccidr, architecture_version, u8, 16, 19);
 register_bits!(iccidr, revision_number, u8, 12, 15);
 register_bits!(iccidr, implementer, u32, 0, 11);
 register!(global_timer_control, GlobalTimerControl, RW, u32);
 register_bits!(global_timer_control, prescaler, u8, 8, 15);
@ -97,3 +264,58 @@ register_bit!(global_timer_control, auto_increment_mode, 3);
 register_bit!(global_timer_control, irq_enable, 2);
 register_bit!(global_timer_control, comp_enablea, 1);
 register_bit!(global_timer_control, timer_enable, 0);
 register!(global_timer_interrupt_status, GlobalTimerInterruptStatusRegister, RW, u32);
 register_bit!(global_timer_interrupt_status, event_flag, 0);
 register!(private_timer_control, PrivateTimerControlRegister, RW, u32);
 register_bits!(private_timer_control, sbzp, u32, 16, 31);
 register_bits!(private_timer_control, prescaler, u8, 8, 15);
 register_bits!(private_timer_control, unk_sbzp, u8, 3, 7);
 register_bit!(private_timer_control, irq_enable, 2);
 register_bit!(private_timer_control, auto_reload, 1);
 register_bit!(private_timer_control, timer_enable, 0);
 register!(private_timer_interrupt_status, PrivateTimerInterruptStatusRegister, RW, u32);
 register_bits!(private_timer_interrupt_status, unk_sbzp, u32, 1, 31);
 register!(watchdog_control, WatchdogControlRegister, RW, u32);
 register_bits!(watchdog_control, prescaler, u8, 8, 15);
 register_bit!(watchdog_control, watchdog_mode, 3);
 register_bit!(watchdog_control, it_enable, 2);
 register_bit!(watchdog_control, auto_reload, 1);
 register_bit!(watchdog_control, watchdog_enable, 0);
 register!(watchdog_interrupt_status, WatchdogInterruptStatusRegister, RW, u32);
 register_bit!(watchdog_interrupt_status, event_flag, 0);
 register!(watchdog_reset_status, WatchdogResetStatusRegister, RW, u32);
 register_bit!(watchdog_reset_status, reset_flag, 0);
 register!(icddcr, ICDDCR, RW, u32);
 register_bit!(icddcr, enable_non_secure, 1);
 register_bit!(icddcr, enable_secure, 0);
 register!(icdictr, ICDICTR, RO, u32);
 register_bits!(icdictr, lspi, u8, 11, 15);
 register_bit!(icdictr, security_extn, 10);
 register_bits!(icdictr, sbz, u8, 8, 9);
 register_bits!(icdictr, cpu_number, u8, 5, 7);
 register_bits!(icdictr, it_lines_number, u8, 0, 4);
 register!(icdiidr, ICDIIDR, RO, u32);
 register_bits!(icdiidr, implementation_version, u8, 24, 31);
 register_bits!(icdiidr, revision_number, u32, 12, 23);
 register_bits!(icdiidr, implementer, u32, 0, 11);
 register!(ppi_status, PpiStatus, RO, u32);
 register_bits!(ppi_status, ppi_status, u8, 11, 15);
 register_bits!(ppi_status, sbz, u32, 0, 10);
 register!(icdsgir, ICDSGIR, RW, u32);
 register_bits!(icdsgir, target_list_filter, u8, 24, 25);
 register_bits!(icdsgir, cpu_target_list, u8, 16, 23);
 register_bit!(icdsgir, satt, 15);
 register_bits!(icdsgir, sbz, u32, 4, 14);
 register_bits!(icdsgir, sgiintid, u8, 0, 3);
--- a/libboard_zynq/src/ps7_init/mod.rs
+++ b/libboard_zynq/src/ps7_init/mod.rs
@ -0,0 +1,108 @@
 use crate::println;
 #[cfg(feature = "target_zc706")]
 mod zc706;
 #[cfg(not(feature = "target_zc706"))]
 mod none;
 #[cfg(feature = "target_zc706")]
 use zc706 as target;
 #[cfg(not(feature = "target_zc706"))]
 use none as target;
 pub fn report_differences() {
    for (i, op) in target::INIT_DATA.iter().enumerate() {
        let address = op.address();
        let overwritten_later = target::INIT_DATA[(i + 1)..].iter()
            .any(|later_op| later_op.address() == address);
        if !overwritten_later {
            op.report_difference();
        }
    }
 }
 pub fn apply() {
    for op in target::INIT_DATA {
        op.apply();
    }
 }
 #[derive(Clone, Debug)]
 pub enum InitOp {
    MaskWrite(usize, usize, usize),
    MaskPoll(usize, usize),
    MaskDelay(usize, usize),
 }
 impl InitOp {
    fn address(&self) -> usize {
        match self {
            InitOp::MaskWrite(address, _, _) => *address,
            InitOp::MaskPoll(address, _) => *address,
            InitOp::MaskDelay(address, _) => *address,
        }
    }
    fn read(&self) -> usize {
        unsafe { *(self.address() as *const usize) }
    }
    fn difference(&self) -> Option<(usize, usize)> {
        let expected = match self {
            InitOp::MaskWrite(_, mask, expected) =>
                Some((*mask, *expected)),
            InitOp::MaskPoll(_, mask) =>
                Some((*mask, *mask)),
            _ => None,
        };
        match expected {
            Some((mask, expected)) => {
                let actual = self.read();
                if actual & mask == expected {
                    None
                } else {
                    Some((actual & mask, expected))
                }
            }
            None =>
                None
        }
    }
    pub fn report_difference(&self) {
        if let Some((actual, expected)) = self.difference() {
            println!(
                "Register {:08X} is {:08X}&={:08X} != {:08X} expected",
                self.address(),
                self.read(),
                actual,
                expected
            );
        }
    }
    pub fn apply(&self) {
        let reg = self.address() as *mut usize;
        println!("apply {:?}", self);
        match self {
            InitOp::MaskWrite(_, mask, val) =>
                unsafe {
                    *reg = (val & mask) | (*reg & !mask);
                },
            InitOp::MaskPoll(_, mask) =>
                while unsafe { *reg } & mask == 0 {},
            InitOp::MaskDelay(_, mask) => {
                let delay = get_number_of_cycles_for_delay(*mask);
                while unsafe { *reg } < delay {
                    println!("W");
                }
            }
        }
    }
 }
 fn get_number_of_cycles_for_delay(delay: usize) -> usize {
    const APU_FREQ: usize = 666666687;
    APU_FREQ * delay/ (2 * 1000)
 }
--- a/libboard_zynq/src/ps7_init/none.rs
+++ b/libboard_zynq/src/ps7_init/none.rs
@ -0,0 +1,4 @@
 use super::InitOp;
 pub const INIT_DATA: &'static [InitOp] = &[
 ];
--- a/libboard_zynq/src/ps7_init/zc706.rs
+++ b/libboard_zynq/src/ps7_init/zc706.rs
--- a/libboard_zynq/src/sdio/adma.rs
+++ b/libboard_zynq/src/sdio/adma.rs
@ -1,6 +1,6 @@
 /// ADMA library
 use core::mem::MaybeUninit;
-use super::SDIO;
+use super::Sdio;
 use libcortex_a9::cache;
 use libregister::{
    register, register_bit,
@ -32,7 +32,7 @@ impl Adma2DescTable {
    }
    /// Initialize the table and setup `adma_system_address`
-    pub fn setup(&mut self, sdio: &mut SDIO, blk_cnt: u32, buffer: &[u8]) {
+    pub fn setup(&mut self, sdio: &mut Sdio, blk_cnt: u32, buffer: &[u8]) {
        let descr_table = &mut self.0;
        let blk_size = sdio
            .regs
--- a/libboard_zynq/src/sdio/mod.rs
+++ b/libboard_zynq/src/sdio/mod.rs
@ -12,9 +12,9 @@ use log::{trace, debug};
 use nb;
 /// Basic SDIO Struct with common low-level functions.
-pub struct SDIO {
+pub struct Sdio {
    regs: &'static mut regs::RegisterBlock,
-    count_down: super::timer::global::CountDown,
+    count_down: super::timer::global::CountDown<Milliseconds>,
    input_clk_hz: u32,
    card_type: CardType,
    card_detect: bool,
@ -48,7 +48,7 @@ pub enum CardType {
    CardMmc,
 }
-impl SDIO {
+impl Sdio {
    /// Initialize SDIO0
    /// card_detect means if we would use the card detect pin,
    /// false to disable card detection (assume there is card inserted)
@ -105,7 +105,7 @@ impl SDIO {
                );
            }
            // cora card detect pin
-            #[cfg(feature = "target_cora_z7_10")]
+            #[cfg(feature = "target_coraz7")]
            {
                unsafe {
                    slcr.sd0_wp_cd_sel.write(47 << 16);
@ -116,12 +116,38 @@ impl SDIO {
                        .speed(true),
                );
            }
            // kasli_soc and redpitaya card detect pin
            #[cfg(any(feature = "target_kasli_soc", feature = "target_redpitaya"))]
            {
                unsafe {
                    slcr.sd0_wp_cd_sel.write(46 << 16);
                }
                slcr.mio_pin_46.write(
                    slcr::MioPin46::zeroed()
                        .io_type(slcr::IoBufferType::Lvcmos25)
                        .speed(true),
                );
            }
            // ebaz4205 card detect pin
            #[cfg(feature = "target_ebaz4205")]
            {
                unsafe {
                    slcr.sd0_wp_cd_sel.write(34 << 16);
                }
                slcr.mio_pin_34.write(
                    slcr::MioPin34::zeroed()
                        .io_type(slcr::IoBufferType::Lvcmos33)
                        .pullup(true)
                        .speed(true),
                );
            }
            slcr.sdio_rst_ctrl.reset_sdio0();
            slcr.aper_clk_ctrl.enable_sdio0();
            slcr.sdio_clk_ctrl.enable_sdio0();
        });
        let clocks = Clocks::get();
-        let mut self_ = SDIO {
+        let mut self_ = Sdio {
            regs: regs::RegisterBlock::sdio0(),
            count_down: unsafe { super::timer::GlobalTimer::get() }.countdown(),
            input_clk_hz: clocks.sdio_ref_clk(),
--- a/libboard_zynq/src/sdio/sd_card.rs
+++ b/libboard_zynq/src/sdio/sd_card.rs
@ -1,4 +1,4 @@
-use super::{adma::Adma2DescTable, cmd, CardType, CmdTransferError, SDIO};
+use super::{adma::Adma2DescTable, cmd, CardType, CmdTransferError, Sdio};
 use libcortex_a9::cache;
 use libregister::{RegisterR, RegisterRW, RegisterW};
 use log::{trace, debug};
@ -37,7 +37,7 @@ enum CardVersion {
 }
 pub struct SdCard {
-    sdio: SDIO,
+    sdio: Sdio,
    adma2_desc_table: Adma2DescTable,
    card_version: CardVersion,
    hcs: bool,
@ -171,8 +171,8 @@ impl SdCard {
        Ok(())
    }
-    /// Convert SDIO into SdCard struct, error if no card inserted or it is not an SD card.
+    /// Convert Sdio into SdCard struct, error if no card inserted or it is not an SD card.
-    pub fn from_sdio(mut sdio: SDIO) -> Result<Self, CardInitializationError> {
+    pub fn from_sdio(mut sdio: Sdio) -> Result<Self, CardInitializationError> {
        match sdio.identify_card()? {
            CardType::CardSd => (),
            _ => return Err(CardInitializationError::NoCardInserted),
@ -192,8 +192,8 @@ impl SdCard {
        Ok(_self)
    }
-    /// Convert SdCard struct back to SDIO struct.
+    /// Convert SdCard struct back to Sdio struct.
-    pub fn to_sdio(self) -> SDIO {
+    pub fn to_sdio(self) -> Sdio {
        self.sdio
    }
--- a/libboard_zynq/src/slcr.rs
+++ b/libboard_zynq/src/slcr.rs
@ -9,9 +9,11 @@ use libregister::{
 #[repr(u8)]
 pub enum PllSource {
-    IoPll  = 0b00,
+    IoPll  = 0b000,
-    ArmPll = 0b10,
+    ArmPll = 0b010,
-    DdrPll = 0b11,
+    DdrPll = 0b011,
    // Ethernet controller 0 EMIO clock
    Emio   = 0b100,
 }
 #[repr(u8)]
@ -102,19 +104,19 @@ pub struct RegisterBlock {
    pub dbg_clk_ctrl: RW<u32>,
    pub pcap_clk_ctrl: RW<u32>,
    pub topsw_clk_ctrl: RW<u32>,
-    pub fpga0_clk_ctrl: RW<u32>,
+    pub fpga0_clk_ctrl: Fpga0ClkCtrl,
    pub fpga0_thr_ctrl: RW<u32>,
    pub fpga0_thr_cnt: RW<u32>,
    pub fpga0_thr_sta: RO<u32>,
-    pub fpga1_clk_ctrl: RW<u32>,
+    pub fpga1_clk_ctrl: Fpga1ClkCtrl,
    pub fpga1_thr_ctrl: RW<u32>,
    pub fpga1_thr_cnt: RW<u32>,
    pub fpga1_thr_sta: RO<u32>,
-    pub fpga2_clk_ctrl: RW<u32>,
+    pub fpga2_clk_ctrl: Fpga2ClkCtrl,
    pub fpga2_thr_ctrl: RW<u32>,
    pub fpga2_thr_cnt: RW<u32>,
    pub fpga2_thr_sta: RO<u32>,
-    pub fpga3_clk_ctrl: RW<u32>,
+    pub fpga3_clk_ctrl: Fpga3ClkCtrl,
    pub fpga3_thr_ctrl: RW<u32>,
    pub fpga3_thr_cnt: RW<u32>,
    pub fpga3_thr_sta: RO<u32>,
@ -132,7 +134,7 @@ pub struct RegisterBlock {
    pub can_rst_ctrl: RW<u32>,
    pub i2c_rst_ctrl: RW<u32>,
    pub uart_rst_ctrl: UartRstCtrl,
-    pub gpio_rst_ctrl: RW<u32>,
+    pub gpio_rst_ctrl: GpioRstCtrl,
    pub lqspi_rst_ctrl: LqspiRstCtrl,
    pub smc_rst_ctrl: RW<u32>,
    pub ocm_rst_ctrl: RW<u32>,
@ -229,18 +231,15 @@ pub struct RegisterBlock {
    pub lvl_shftr_en: LvlShftr,
    reserved18: [u32; 3],
    pub ocm_cfg: RW<u32>,
-    reserved19: [u32; 66],
+    reserved19: [u32; 123],
    /// barely documented unnamed register to prepare L2 cache setup
    pub unnamed1: RW<u32>,
    reserved120: [u32; 56],
    pub gpiob_ctrl: GpiobCtrl,
    pub gpiob_cfg_cmos18: RW<u32>,
    pub gpiob_cfg_cmos25: RW<u32>,
    pub gpiob_cfg_cmos33: RW<u32>,
-    reserved21: [u32; 1],
+    reserved20: [u32; 1],
    pub gpiob_cfg_hstl: RW<u32>,
    pub gpiob_drvr_bias_ctrl: RW<u32>,
-    reserved22: [u32; 9],
+    reserved21: [u32; 9],
    pub ddriob_addr0: DdriobConfig,
    pub ddriob_addr1: DdriobConfig,
    pub ddriob_data0: DdriobConfig,
@ -256,26 +255,18 @@ pub struct RegisterBlock {
    pub ddriob_dci_ctrl: DdriobDciCtrl,
    pub ddriob_dci_status: DdriobDciStatus,
 }
-register_at!(RegisterBlock, 0xF8000000, new);
+register_at!(RegisterBlock, 0xF8000000, slcr);
 impl RegisterBlock {
    /// Required to modify any sclr register
    pub fn unlocked<F: FnMut(&mut Self) -> R, R>(mut f: F) -> R {
-        let mut self_ = Self::new();
+        let mut self_ = Self::slcr();
        self_.slcr_unlock.unlock();
        let r = f(&mut self_);
        self_.slcr_lock.lock();
        r
    }
    /// Perform a soft reset
    pub fn soft_reset(&mut self) {
        self.pss_rst_ctrl.write(
            PssRstCtrl::zeroed()
                .soft_rst(true)
        );
    }
    pub fn init_preload_fpga(&mut self) {
        // Assert FPGA top level output resets
        self.fpga_rst_ctrl.write(
@ -542,6 +533,20 @@ impl UartRstCtrl {
    }
 }
 register!(gpio_rst_ctrl, GpioRstCtrl, RW, u32);
 register_bit!(gpio_rst_ctrl, gpio_cpu1x_rst, 0);
 register_at!(GpioRstCtrl, 0xF800022C, new);
 impl GpioRstCtrl {
    pub fn reset_gpio(&mut self) {
        self.modify(|_, w|
            w.gpio_cpu1x_rst(true)
        );
        self.modify(|_, w|
            w.gpio_cpu1x_rst(false)
        );
    }
 }
 register!(lqspi_clk_ctrl, LqspiClkCtrl, RW, u32);
 register_bit!(lqspi_clk_ctrl, clkact, 0);
 register_bits_typed!(lqspi_clk_ctrl, src_sel, u8, PllSource, 4, 5);
@ -551,6 +556,26 @@ register!(lqspi_rst_ctrl, LqspiRstCtrl, RW, u32);
 register_bit!(lqspi_rst_ctrl, ref_rst, 1);
 register_bit!(lqspi_rst_ctrl, cpu1x_rst, 0);
 register!(fpga0_clk_ctrl, Fpga0ClkCtrl, RW, u32);
 register_bits!(fpga0_clk_ctrl, divisor1, u8, 20, 25);
 register_bits!(fpga0_clk_ctrl, divisor0, u8, 8, 13);
 register_bits_typed!(fpga0_clk_ctrl, src_sel, u8, PllSource, 4, 5);
 register!(fpga1_clk_ctrl, Fpga1ClkCtrl, RW, u32);
 register_bits!(fpga1_clk_ctrl, divisor1, u8, 20, 25);
 register_bits!(fpga1_clk_ctrl, divisor0, u8, 8, 13);
 register_bits_typed!(fpga1_clk_ctrl, src_sel, u8, PllSource, 4, 5);
 register!(fpga2_clk_ctrl, Fpga2ClkCtrl, RW, u32);
 register_bits!(fpga2_clk_ctrl, divisor1, u8, 20, 25);
 register_bits!(fpga2_clk_ctrl, divisor0, u8, 8, 13);
 register_bits_typed!(fpga2_clk_ctrl, src_sel, u8, PllSource, 4, 5);
 register!(fpga3_clk_ctrl, Fpga3ClkCtrl, RW, u32);
 register_bits!(fpga3_clk_ctrl, divisor1, u8, 20, 25);
 register_bits!(fpga3_clk_ctrl, divisor0, u8, 8, 13);
 register_bits_typed!(fpga3_clk_ctrl, src_sel, u8, PllSource, 4, 5);
 register!(fpga_rst_ctrl, FpgaRstCtrl, RW, u32);
 register_bit!(fpga_rst_ctrl, fpga0_out_rst, 0);
 register_bit!(fpga_rst_ctrl, fpga1_out_rst, 1);
@ -564,22 +589,36 @@ register_bit!(a9_cpu_rst_ctrl, a9_clkstop0, 4);
 register_bit!(a9_cpu_rst_ctrl, a9_rst1, 1);
 register_bit!(a9_cpu_rst_ctrl, a9_rst0, 0);
 pub fn reboot() {
    RegisterBlock::unlocked(|slcr| {
        unsafe {
            let reboot = slcr.reboot_status.read();
            slcr.reboot_status.write(reboot & 0xF0FFFFFF);
            slcr.pss_rst_ctrl.modify(|_, w| w.soft_rst(true));
        }
    });
 }
 #[derive(Clone, Copy, Debug, PartialEq)]
 #[repr(u8)]
 pub enum BootModePins {
    // CAUTION!
    // The BOOT_MODE bits table 6-4 in UG585 are *out of order*.
    Jtag = 0b000,
-    Nor = 0b001,
+    Nor = 0b010,
-    Nand = 0b010,
+    Nand = 0b100,
-    QuadSpi = 0b100,
+    QuadSpi = 0b001,
-    SdCard = 0b110,
+    SdCard = 0b101,
 }
 register!(boot_mode, BootMode, RO, u32);
 register_bit!(boot_mode, pll_bypass, 4);
-register_bits_typed!(boot_mode, boot_mode_pins, u8, BootModePins, 0, 3);
+register_bit!(boot_mode, jtag_routing, 3);
 register_bits_typed!(boot_mode, boot_mode_pins, u8, BootModePins, 0, 2);
 register!(pss_rst_ctrl, PssRstCtrl, RW, u32);
-register_bit!(pss_rst_ctrl, soft_rst, 1);
+register_bit!(pss_rst_ctrl, soft_rst, 0);
 /// Used for MioPin*.io_type
 #[repr(u8)]
--- a/libboard_zynq/src/stdio.rs
+++ b/libboard_zynq/src/stdio.rs
@ -1,5 +1,5 @@
 use core::ops::{Deref, DerefMut};
-use libcortex_a9::mutex::{Mutex, MutexGuard};
+use libcortex_a9::{asm, mutex::{Mutex, MutexGuard}};
 use crate::uart::Uart;
 const UART_RATE: u32 = 115_200;
@ -10,7 +10,15 @@ pub fn get_uart<'a>() -> MutexGuard<'a, LazyUart> {
    unsafe { UART.lock() }
 }
 /// Deinitialize so that the Uart will be reinitialized on next
 /// output.
 ///
 /// Delays so that an outstanding transmission can finish.
 pub fn drop_uart() {
    for _ in 0..1_000_000 {
        asm::nop();
    }
    unsafe { UART = Mutex::new(LazyUart::Uninitialized); }
 }
@ -37,7 +45,14 @@ impl DerefMut for LazyUart {
    fn deref_mut(&mut self) -> &mut Uart {
        match self {
            LazyUart::Uninitialized => {
-                let uart = Uart::serial(UART_RATE);
+                #[cfg(any(feature = "target_coraz7", feature = "target_redpitaya"))]
                let uart = Uart::uart0(UART_RATE);
                #[cfg(any(
                    feature = "target_zc706",
                    feature = "target_ebaz4205",
                    feature = "target_kasli_soc",
                ))]
                let uart = Uart::uart1(UART_RATE);
                *self = LazyUart::Initialized(uart);
                self
            }
--- a/libboard_zynq/src/time.rs
+++ b/libboard_zynq/src/time.rs
@ -8,3 +8,18 @@ impl core::ops::Add for Milliseconds {
        Milliseconds(self.0 + rhs.0)
    }
 }
 #[derive(Debug, Clone, Copy, PartialEq, PartialOrd)]
 pub struct Microseconds(pub u64);
 impl core::ops::Add for Microseconds {
    type Output = Self;
    fn add(self, rhs: Self) -> Self::Output {
        Microseconds(self.0 + rhs.0)
    }
 }
 pub trait TimeSource<U> {
    fn now(&self) -> U;
 }
--- a/libboard_zynq/src/timer/global.rs
+++ b/libboard_zynq/src/timer/global.rs
@ -1,9 +1,10 @@
 use core::ops::Add;
 use void::Void;
 use libregister::{RegisterR, RegisterW};
 use crate::{
    clocks::Clocks,
    mpcore,
-    time::Milliseconds,
+    time::{Milliseconds, Microseconds, TimeSource},
 };
 /// "uptime"
@ -15,13 +16,13 @@ pub struct GlobalTimer {
 impl GlobalTimer {
    /// Get the potentially uninitialized timer
    pub unsafe fn get() -> GlobalTimer {
-        let regs = mpcore::RegisterBlock::new();
+        let regs = mpcore::RegisterBlock::mpcore();
        GlobalTimer { regs }
    }
    /// Get the timer with a reset
    pub fn start() -> GlobalTimer {
-        let mut regs = mpcore::RegisterBlock::new();
+        let mut regs = mpcore::RegisterBlock::mpcore();
        Self::reset(&mut regs);
        GlobalTimer { regs }
    }
@ -79,41 +80,91 @@ impl GlobalTimer {
    }
    /// read with high precision
-    pub fn get_us(&self) -> u64 {
+    pub fn get_us(&self) -> Microseconds {
        let prescaler = self.regs.global_timer_control.read().prescaler() as u64;
        let clocks = Clocks::get();
-        1_000_000 * self.get_counter() * (prescaler + 1) / clocks.cpu_3x2x() as u64
+        Microseconds(1_000_000 * self.get_counter() * (prescaler + 1) / clocks.cpu_3x2x() as u64)
    }
    /// return a handle that has implements
    /// `embedded_hal::timer::CountDown`
-    pub fn countdown(&self) -> CountDown {
+    pub fn countdown<U>(&self) -> CountDown<U>
    where
        Self: TimeSource<U>,
    {
        CountDown {
            timer: self.clone(),
-            timeout: Milliseconds(0),
+            timeout: self.now(),
        }
    }
 }
 impl TimeSource<Milliseconds> for GlobalTimer {
    fn now(&self) -> Milliseconds {
        self.get_time()
    }
 }
 impl TimeSource<Microseconds> for GlobalTimer {
    fn now(&self) -> Microseconds {
        self.get_us()
    }
 }
 #[derive(Clone)]
-pub struct CountDown {
+pub struct CountDown<U> {
    timer: GlobalTimer,
-    timeout: Milliseconds,
+    timeout: U,
 }
-impl embedded_hal::timer::CountDown for CountDown {
+/// embedded-hal async API
-    type Time = Milliseconds;
+impl<U: Add<Output=U> + PartialOrd> embedded_hal::timer::CountDown for CountDown<U>
 where
    GlobalTimer: TimeSource<U>,
 {
    type Time = U;
    fn start<T: Into<Self::Time>>(&mut self, count: T) {
-        self.timeout = self.timer.get_time() + count.into();
+        self.timeout = self.timer.now() + count.into();
    }
    fn wait(&mut self) -> nb::Result<(), Void> {
-        if self.timer.get_time() < self.timeout {
+        if self.timer.now() <= self.timeout {
            Err(nb::Error::WouldBlock)
        } else {
            Ok(())
        }
    }
 }
 impl<U: PartialOrd> CountDown<U>
 where
    GlobalTimer: TimeSource<U>,
 {
    pub fn waiting(&self) -> bool {
        self.timer.now() <= self.timeout
    }
 }
 /// embedded-hal sync API
 impl embedded_hal::blocking::delay::DelayMs<u64> for GlobalTimer {
    fn delay_ms(&mut self, ms: u64) {
        use embedded_hal::timer::CountDown;
        let mut countdown = self.countdown::<Milliseconds>();
        countdown.start(Milliseconds(ms));
        nb::block!(countdown.wait()).unwrap();
    }
 }
 /// embedded-hal sync API
 impl embedded_hal::blocking::delay::DelayUs<u64> for GlobalTimer {
    fn delay_us(&mut self, us: u64) {
        use embedded_hal::timer::CountDown;
        let mut countdown = self.countdown::<Microseconds>();
        countdown.start(Microseconds(us));
        nb::block!(countdown.wait()).unwrap();
    }
 }
--- a/libboard_zynq/src/uart/mod.rs
+++ b/libboard_zynq/src/uart/mod.rs
@ -13,31 +13,8 @@ pub struct Uart {
 }
 impl Uart {
-    #[cfg(feature = "target_zc706")]
+    #[cfg(any(feature = "target_coraz7", feature = "target_redpitaya"))]
-    pub fn serial(baudrate: u32) -> Self {
+    pub fn uart0(baudrate: u32) -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            // Route UART 1 RxD/TxD Signals to MIO Pins
            // TX pin
            slcr.mio_pin_48.write(
                slcr::MioPin48::zeroed()
                    .l3_sel(0b111)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            // RX pin
            slcr.mio_pin_49.write(
                slcr::MioPin49::zeroed()
                    .tri_enable(true)
                    .l3_sel(0b111)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
        });
        Self::uart1(baudrate)
    }
    #[cfg(feature = "target_cora_z7_10")]
    pub fn serial(baudrate: u32) -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            // Route UART 0 RxD/TxD Signals to MIO Pins
            // TX pin
@ -56,10 +33,7 @@ impl Uart {
                    .pullup(true)
            );
        });
        Self::uart0(baudrate)
    }
    pub fn uart0(baudrate: u32) -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.uart_rst_ctrl.reset_uart0();
            slcr.aper_clk_ctrl.enable_uart0();
@ -72,7 +46,60 @@ impl Uart {
        self_
    }
    #[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
    pub fn uart1(baudrate: u32) -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            // Route UART 1 RxD/TxD Signals to MIO Pins
            // TX pin
            slcr.mio_pin_48.write(
                slcr::MioPin48::zeroed()
                    .l3_sel(0b111)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
            // RX pin
            slcr.mio_pin_49.write(
                slcr::MioPin49::zeroed()
                    .tri_enable(true)
                    .l3_sel(0b111)
                    .io_type(slcr::IoBufferType::Lvcmos18)
                    .pullup(true)
            );
        });
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.uart_rst_ctrl.reset_uart1();
            slcr.aper_clk_ctrl.enable_uart1();
            slcr.uart_clk_ctrl.enable_uart1();
        });
        let mut self_ = Uart {
            regs: regs::RegisterBlock::uart1(),
        };
        self_.configure(baudrate);
        self_
    }
    #[cfg(feature = "target_ebaz4205")]
    pub fn uart1(baudrate: u32) -> Self {
        slcr::RegisterBlock::unlocked(|slcr| {
            // Route UART 1 RxD/TxD Signals to MIO Pins
            // TX pin
            slcr.mio_pin_24.write(
                slcr::MioPin24::zeroed()
                    .l3_sel(0b111)
                    .io_type(slcr::IoBufferType::Lvcmos33)
                    .pullup(true)
            );
            // RX pin
            slcr.mio_pin_25.write(
                slcr::MioPin25::zeroed()
                    .tri_enable(true)
                    .l3_sel(0b111)
                    .io_type(slcr::IoBufferType::Lvcmos33)
                    .pullup(true)
            );
        });
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.uart_rst_ctrl.reset_uart1();
            slcr.aper_clk_ctrl.enable_uart1();
--- a/libconfig/Cargo.toml
+++ b/libconfig/Cargo.toml
@ -0,0 +1,29 @@
 [package]
 name = "libconfig"
 version = "0.1.0"
 authors = ["M-Labs"]
 edition = "2018"
 [dependencies]
 libboard_zynq = { path = "../libboard_zynq" }
 log = "0.4"
 [dependencies.core_io]
 git = "https://git.m-labs.hk/M-Labs/rs-core_io.git"
 rev = "e9d3edf027"
 features = ["collections"]
 [dependencies.fatfs]
 git = "https://git.m-labs.hk/M-Labs/rust-fatfs.git"
 rev = "4b5e420084"
 default-features = false
 features = ["core_io"]
 [features]
 target_zc706 = []
 target_coraz7 = []
 target_ebaz4205 = []
 target_redpitaya = []
 target_kasli_soc = []
 ipv6 = []
 fat_lfn = [ "fatfs/alloc" ]
--- a/libconfig/src/bootgen.rs
+++ b/libconfig/src/bootgen.rs
@ -0,0 +1,181 @@
 use alloc::vec::Vec;
 use core_io::{Error, Read, Seek, SeekFrom};
 use libboard_zynq::devc;
 use log::debug;
 #[derive(Debug)]
 pub enum BootgenLoadingError {
    InvalidBootImageHeader,
    MissingPartition,
    EncryptedBitstream,
    IoError(Error),
    DevcError(devc::DevcError),
 }
 impl From<Error> for BootgenLoadingError {
    fn from(error: Error) -> Self {
        BootgenLoadingError::IoError(error)
    }
 }
 impl From<devc::DevcError> for BootgenLoadingError {
    fn from(error: devc::DevcError) -> Self {
        BootgenLoadingError::DevcError(error)
    }
 }
 impl core::fmt::Display for BootgenLoadingError {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        use BootgenLoadingError::*;
        match self {
            InvalidBootImageHeader => write!(
                f,
                "Invalid boot image header. Check if the file is correct."
            ),
            MissingPartition => write!(f, "Partition not found. Check your compile configuration."),
            EncryptedBitstream => write!(f, "Encrypted bitstream is not supported."),
            IoError(e) => write!(f, "Error while reading: {}", e),
            DevcError(e) => write!(f, "PCAP interface error: {}", e),
        }
    }
 }
 #[repr(C)]
 struct PartitionHeader {
    pub encrypted_length: u32,
    pub unencrypted_length: u32,
    pub word_length: u32,
    pub dest_load_addr: u32,
    pub dest_exec_addr: u32,
    pub data_offset: u32,
    pub attribute_bits: u32,
    pub section_count: u32,
    pub checksum_offset: u32,
    pub header_offset: u32,
    pub cert_offset: u32,
    pub reserved: [u32; 4],
    pub checksum: u32,
 }
 /// Read a u32 word from the reader.
 fn read_u32<Reader: Read>(reader: &mut Reader) -> Result<u32, BootgenLoadingError> {
    let mut buffer: [u8; 4] = [0; 4];
    reader.read_exact(&mut buffer)?;
    let mut result: u32 = 0;
    for i in 0..4 {
        result |= (buffer[i] as u32) << (i * 8);
    }
    Ok(result)
 }
 /// Load PL partition header.
 fn load_pl_header<File: Read + Seek>(
    file: &mut File,
 ) -> Result<Option<PartitionHeader>, BootgenLoadingError> {
    let mut buffer: [u8; 0x40] = [0; 0x40];
    file.read_exact(&mut buffer)?;
    let header = unsafe { core::mem::transmute::<_, PartitionHeader>(buffer) };
    if header.attribute_bits & (2 << 4) != 0 {
        Ok(Some(header))
    } else {
        Ok(None)
    }
 }
 fn load_ps_header<File: Read + Seek>(
    file: &mut File,
 ) -> Result<Option<PartitionHeader>, BootgenLoadingError> {
    let mut buffer: [u8; 0x40] = [0; 0x40];
    file.read_exact(&mut buffer)?;
    let header = unsafe { core::mem::transmute::<_, PartitionHeader>(buffer) };
    if header.attribute_bits & (1 << 4) != 0 {
        Ok(Some(header))
    } else {
        Ok(None)
    }
 }
 /// Locate the partition from the image, and return the size (in bytes) of the partition if successful.
 /// This function would seek the file to the location of the partition.
 fn locate<
    File: Read + Seek,
    F: Fn(&mut File) -> Result<Option<PartitionHeader>, BootgenLoadingError>,
 >(
    file: &mut File,
    f: F,
 ) -> Result<usize, BootgenLoadingError> {
    file.seek(SeekFrom::Start(0))?;
    const BOOT_HEADER_SIGN: u32 = 0x584C4E58;
    // read boot header signature
    file.seek(SeekFrom::Start(0x24))?;
    if read_u32(file)? != BOOT_HEADER_SIGN {
        return Err(BootgenLoadingError::InvalidBootImageHeader);
    }
    // find fsbl offset
    file.seek(SeekFrom::Start(0x30))?;
    // the length is in bytes, we have to convert it to words to compare with the partition offset
    // later
    let fsbl = read_u32(file)? / 4;
    // read partition header offset
    file.seek(SeekFrom::Start(0x9C))?;
    let ptr = read_u32(file)?;
    debug!("Partition header pointer = {:0X}", ptr);
    file.seek(SeekFrom::Start(ptr as u64))?;
    // at most 3 partition headers
    for _ in 0..3 {
        if let Some(header) = f(file)? {
            let encrypted_length = header.encrypted_length;
            let unencrypted_length = header.unencrypted_length;
            debug!("Unencrypted length = {:0X}", unencrypted_length);
            if encrypted_length != unencrypted_length {
                return Err(BootgenLoadingError::EncryptedBitstream);
            }
            let start_addr = header.data_offset;
            // skip fsbl
            if start_addr == fsbl {
                continue;
            }
            debug!("Partition start address: {:0X}", start_addr);
            file.seek(SeekFrom::Start(start_addr as u64 * 4))?;
            return Ok(unencrypted_length as usize * 4);
        }
    }
    Err(BootgenLoadingError::MissingPartition)
 }
 /// Load bitstream from bootgen file.
 /// This function parses the file, locate the bitstream and load it through the PCAP driver.
 /// It requires a large buffer, please enable the DDR RAM before using it.
 pub fn load_bitstream<File: Read + Seek>(file: &mut File) -> Result<(), BootgenLoadingError> {
    let size = locate(file, load_pl_header)?;
    unsafe {
        // align to 64 bytes
        let ptr = alloc::alloc::alloc(alloc::alloc::Layout::from_size_align(size, 64).unwrap());
        let buffer = core::slice::from_raw_parts_mut(ptr, size);
        file.read_exact(buffer).map_err(|e| {
            core::ptr::drop_in_place(ptr);
            e
        })?;
        let mut devcfg = devc::DevC::new();
        devcfg.enable();
        devcfg.program(&buffer).map_err(|e| {
            core::ptr::drop_in_place(ptr);
            e
        })?;
        core::ptr::drop_in_place(ptr);
        Ok(())
    }
 }
 pub fn get_runtime<File: Read + Seek>(file: &mut File) -> Result<Vec<u8>, BootgenLoadingError> {
    let size = locate(file, load_ps_header)?;
    let mut buffer = Vec::with_capacity(size);
    unsafe {
        buffer.set_len(size);
    }
    file.read_exact(&mut buffer)?;
    Ok(buffer)
 }
--- a/libconfig/src/lib.rs
+++ b/libconfig/src/lib.rs
@ -0,0 +1,174 @@
 #![no_std]
 extern crate alloc;
 use core::fmt;
 use alloc::{string::FromUtf8Error, string::String, vec::Vec, rc::Rc};
 use core_io::{self as io, BufRead, BufReader, Read, Write, Seek, SeekFrom};
 use libboard_zynq::sdio;
 pub mod sd_reader;
 pub mod net_settings;
 pub mod bootgen;
 #[derive(Debug)]
 pub enum Error<'a> {
    SdError(sdio::sd_card::CardInitializationError),
    IoError(io::Error),
    Utf8Error(FromUtf8Error),
    KeyNotFoundError(&'a str),
    NoConfig,
 }
 pub type Result<'a, T> = core::result::Result<T, Error<'a>>;
 impl<'a> fmt::Display for Error<'a> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Error::SdError(error) => write!(f, "SD error: {}", error),
            Error::IoError(error) => write!(f, "I/O error: {}", error),
            Error::Utf8Error(error) => write!(f, "UTF-8 error: {}", error),
            Error::KeyNotFoundError(name) => write!(f, "Configuration key `{}` not found", name),
            Error::NoConfig => write!(f, "Configuration not present"),
        }
    }
 }
 impl<'a> From<sdio::sd_card::CardInitializationError> for Error<'a> {
    fn from(error: sdio::sd_card::CardInitializationError) -> Self {
        Error::SdError(error)
    }
 }
 impl<'a> From<io::Error> for Error<'a> {
    fn from(error: io::Error) -> Self {
        Error::IoError(error)
    }
 }
 impl<'a> From<FromUtf8Error> for Error<'a> {
    fn from(error: FromUtf8Error) -> Self {
        Error::Utf8Error(error)
    }
 }
 fn parse_config<'a>(
    key: &'a str,
    buffer: &mut Vec<u8>,
    file: fatfs::File<sd_reader::SdReader>,
 ) -> Result<'a, ()> {
    let prefix = [key, "="].concat().to_ascii_lowercase();
    for line in BufReader::new(file).lines() {
        let line = line?.to_ascii_lowercase();
        if line.starts_with(&prefix) {
            buffer.extend(line[prefix.len()..].as_bytes());
            return Ok(());
        }
    }
    Err(Error::KeyNotFoundError(key))
 }
 pub struct Config {
    fs: Option<Rc<fatfs::FileSystem<sd_reader::SdReader>>>,
 }
 const NEWLINE: &[u8] = b"\n";
 impl Config {
    pub fn new() -> Result<'static, Self> {
        let sdio = sdio::Sdio::sdio0(true);
        if !sdio.is_card_inserted() {
            Err(sdio::sd_card::CardInitializationError::NoCardInserted)?;
        }
        let sd = sdio::sd_card::SdCard::from_sdio(sdio)?;
        let reader = sd_reader::SdReader::new(sd);
        let fs = reader.mount_fatfs(sd_reader::PartitionEntry::Entry1)?;
        Ok(Config { fs: Some(Rc::new(fs)) })
    }
    pub fn from_fs(fs: Option<Rc<fatfs::FileSystem<sd_reader::SdReader>>>) -> Self {
        Config { fs }
    }
    pub fn new_dummy() -> Self {
        Config { fs: None }
    }
    pub fn read<'b>(&self, key: &'b str) -> Result<'b, Vec<u8>> {
        if let Some(fs) = &self.fs {
            let root_dir = fs.root_dir();
            let mut buffer: Vec<u8> = Vec::new();
            match root_dir.open_file(&["/CONFIG/", key, ".BIN"].concat()) {
                Ok(mut f) => f.read_to_end(&mut buffer).map(|_| ())?,
                Err(_) => match root_dir.open_file("/CONFIG.TXT") {
                    Ok(f) => parse_config(key, &mut buffer, f)?,
                    Err(_) => return Err(Error::KeyNotFoundError(key)),
                },
            };
            Ok(buffer)
        } else {
            Err(Error::NoConfig)
        }
    }
    pub fn read_str<'b>(&self, key: &'b str) -> Result<'b, String> {
        Ok(String::from_utf8(self.read(key)?)?)
    }
    pub fn remove<'b>(&self, key: &'b str) -> Result<'b, ()> {
        if let Some(fs) = &self.fs {
            let root_dir = fs.root_dir();
            match root_dir.remove(&["/CONFIG/", key, ".BIN"].concat()) {
                Ok(()) => Ok(()),
                Err(_) => {
                    let prefix = [key, "="].concat().to_ascii_lowercase();
                    match root_dir.create_file("/CONFIG.TXT") {
                        Ok(mut f) => {
                            let mut buffer = String::new();
                            f.read_to_string(&mut buffer)?;
                            f.seek(SeekFrom::Start(0))?;
                            f.truncate()?;
                            for line in buffer.lines() {
                                if line.len() > 0 && !line.to_ascii_lowercase().starts_with(&prefix) {
                                    f.write(line.as_bytes())?;
                                    f.write(NEWLINE)?;
                                }
                            }
                            Ok(())
                        },
                        Err(_) => Err(Error::KeyNotFoundError(key))
                    }
                }
            }
        } else {
            Err(Error::NoConfig)
        }
    }
    pub fn write<'b>(&self, key: &'b str, value: Vec<u8>) -> Result<'b, ()> {
        if self.fs.is_none() {
            return Err(Error::NoConfig);
        }
        let fs = self.fs.as_ref().unwrap();
        let root_dir = fs.root_dir();
        let is_str = value.len() <= 100 && value.is_ascii() && !value.contains(&b'\n');
        if key == "boot" {
            let mut f = root_dir.create_file("/BOOT.BIN")?;
            f.truncate()?;
            f.write_all(&value)?;
            drop(f);
        } else {
            let _ = self.remove(key);
            if is_str {
                let mut f = root_dir.create_file("/CONFIG.TXT")?;
                f.seek(SeekFrom::End(0))?;
                write!(f, "{}={}\n", key, String::from_utf8(value).unwrap())?;
            } else {
                let dir = root_dir.create_dir("/CONFIG")?;
                let mut f = dir.create_file(&[key, ".BIN"].concat())?;
                f.write_all(&value)?;
            }
        }
        Ok(())
    }
 }
--- a/libconfig/src/net_settings.rs
+++ b/libconfig/src/net_settings.rs
@ -0,0 +1,92 @@
 use core::fmt;
 use libboard_zynq::smoltcp::wire::{EthernetAddress, IpAddress};
 use super::Config;
 pub struct NetAddresses {
    pub hardware_addr: EthernetAddress,
    pub ipv4_addr: IpAddress,
    #[cfg(feature = "ipv6")]
    pub ipv6_ll_addr: IpAddress,
    #[cfg(feature = "ipv6")]
    pub ipv6_addr: Option<IpAddress>
 }
 impl fmt::Display for NetAddresses {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "MAC={} IPv4={} ",
            self.hardware_addr, self.ipv4_addr)?;
        #[cfg(feature = "ipv6")]
        {
            write!(f, "IPv6-LL={}", self.ipv6_ll_addr)?;
            match self.ipv6_addr {
                Some(addr) => write!(f, " {}", addr)?,
                None => write!(f, " IPv6: no configured address")?
            }
        }
        Ok(())
    }
 }
 #[cfg(feature = "target_kasli_soc")]
 fn get_address_from_eeprom() -> EthernetAddress {
    use libboard_zynq::i2c::{I2c, eeprom};
    let mut i2c = I2c::i2c0();
    i2c.init().unwrap();
    let mut eeprom = eeprom::EEPROM::new(&mut i2c, 16);
    let address = eeprom.read_eui48().unwrap_or([0x02, 0x00, 0x00, 0x00, 0x00, 0x56]);
    EthernetAddress(address)
 }
 pub fn get_addresses(cfg: &Config) -> NetAddresses {
    #[cfg(feature = "target_zc706")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x52]);
    #[cfg(feature = "target_zc706")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 52);
    #[cfg(feature = "target_coraz7")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x54]);
    #[cfg(feature = "target_coraz7")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 54);
    #[cfg(feature = "target_redpitaya")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x55]);
    #[cfg(feature = "target_redpitaya")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 55);
    #[cfg(feature = "target_kasli_soc")]
    let mut hardware_addr = get_address_from_eeprom();
    #[cfg(feature = "target_kasli_soc")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 56);
    #[cfg(feature = "target_ebaz4205")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x57]);
    #[cfg(feature = "target_ebaz4205")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 57);
    if let Ok(Ok(addr)) = cfg.read_str("mac").map(|s| s.parse()) {
        hardware_addr = addr;
    }
    if let Ok(Ok(addr)) = cfg.read_str("ip").map(|s| s.parse()) {
        ipv4_addr = addr;
    }
    #[cfg(feature = "ipv6")]
    let ipv6_addr = cfg.read_str("ip6").ok().and_then(|s| s.parse().ok());
    #[cfg(feature = "ipv6")]
    let ipv6_ll_addr = IpAddress::v6(
        0xfe80, 0x0000, 0x0000, 0x0000,
        (((hardware_addr.0[0] ^ 0x02) as u16) << 8) | (hardware_addr.0[1] as u16),
        ((hardware_addr.0[2] as u16) << 8) | 0x00ff,
        0xfe00 | (hardware_addr.0[3] as u16),
        ((hardware_addr.0[4] as u16) << 8) | (hardware_addr.0[5] as u16));
    NetAddresses {
        hardware_addr,
        ipv4_addr,
        #[cfg(feature = "ipv6")]
        ipv6_ll_addr,
        #[cfg(feature = "ipv6")]
        ipv6_addr
    }
 }
--- a/libconfig/src/sd_reader.rs
+++ b/libconfig/src/sd_reader.rs
@ -0,0 +1,304 @@
 use core_io::{BufRead, Error, ErrorKind, Read, Result as IoResult, Seek, SeekFrom, Write};
 use fatfs;
 use libboard_zynq::sdio::{sd_card::SdCard, CmdTransferError};
 use log::debug;
 use alloc::vec::Vec;
 const MBR_SIGNATURE: [u8; 2] = [0x55, 0xAA];
 const PARTID_FAT12: u8 = 0x01;
 const PARTID_FAT16_LESS32M: u8 = 0x04;
 const PARTID_FAT16: u8 = 0x06;
 const PARTID_FAT32: u8 = 0x0B;
 const PARTID_FAT32_LBA: u8 = 0x0C;
 const PARTID_FAT16_LBA: u8 = 0x0E;
 fn cmd_error_to_io_error(_: CmdTransferError) -> Error {
    Error::new(ErrorKind::Other, "Command transfer error")
 }
 const BLOCK_SIZE: usize = 512;
 /// SdReader struct implementing `Read + BufRead + Write + Seek` traits for `core_io`.
 /// Used as an adaptor for fatfs crate, but could be used directly for raw data access.
 ///
 /// Implementation: all read/writes would be split into unaligned and block-aligned parts,
 /// unaligned read/writes would do a buffered read/write using a block-sized internal buffer,
 /// while aligned transactions would be sent to the SD card directly for performance reason.
 pub struct SdReader {
    /// Internal SdCard handle.
    sd: SdCard,
    /// Read buffer with the size of 1 block.
    buffer: Vec<u8>,
    /// Address for the next byte.
    byte_addr: u32,
    /// Internal index for the next byte.
    /// Normally in range `[0, BLOCK_SIZE - 1]`.
    ///
    /// `index = BLOCK_SIZE` means that the `buffer` is invalid for the current `byte_addr`,
    /// the next `fill_buf` call would fill the buffer.
    index: usize,
    /// Dirty flag indicating the content has to be flushed.
    dirty: bool,
    /// Base offset for translation from logical address to physical address.
    offset: u32,
 }
 #[derive(Copy, Clone)]
 #[allow(unused)]
 // Partition entry enum, normally we would use entry1.
 pub enum PartitionEntry {
    Entry1 = 0x1BE,
    Entry2 = 0x1CE,
    Entry3 = 0x1DE,
    Entry4 = 0x1EE,
 }
 impl SdReader {
    /// Create SdReader from SdCard
    pub fn new(sd: SdCard) -> SdReader {
        let mut vec: Vec<u8> = Vec::with_capacity(BLOCK_SIZE);
        unsafe {
            vec.set_len(vec.capacity());
        }
        SdReader {
            sd,
            buffer: vec,
            byte_addr: 0,
            index: BLOCK_SIZE,
            dirty: false,
            offset: 0,
        }
    }
    /// Internal read function for unaligned read.
    /// The read must not cross block boundary.
    fn read_unaligned(&mut self, buf: &mut [u8]) -> IoResult<usize> {
        if buf.len() == 0 {
            return Ok(0);
        }
        let filled_buffer = self.fill_buf()?;
        for (dest, src) in buf.iter_mut().zip(filled_buffer.iter()) {
            *dest = *src;
        }
        self.consume(buf.len());
        Ok(buf.len())
    }
    /// Internal write function for unaligned write.
    /// The write must not cross block boundary.
    fn write_unaligned(&mut self, buf: &[u8]) -> IoResult<usize> {
        if buf.len() == 0 {
            return Ok(0);
        }
        // update buffer if needed, as we will flush the entire block later.
        self.fill_buf()?;
        self.dirty = true;
        let dest_buffer = &mut self.buffer[self.index..];
        for (src, dest) in buf.iter().zip(dest_buffer.iter_mut()) {
            *dest = *src;
        }
        self.consume(buf.len());
        Ok(buf.len())
    }
    /// Split the slice into three segments, with the middle block-aligned.
    /// Alignment depends on the current `self.byte_addr` instead of the slice pointer address
    fn block_align<'b>(&self, buf: &'b [u8]) -> (&'b [u8], &'b [u8], &'b [u8]) {
        let head_len = BLOCK_SIZE - (self.byte_addr as usize % BLOCK_SIZE);
        if head_len > buf.len() {
            (buf, &[], &[])
        } else {
            let remaining_length = buf.len() - head_len;
            let mid_length = remaining_length - remaining_length % BLOCK_SIZE;
            let (head, remaining) = buf.split_at(head_len);
            let (mid, tail) = remaining.split_at(mid_length);
            (head, mid, tail)
        }
    }
    /// Split the mutable slice into three segments, with the middle block-aligned.
    /// Alignment depends on the current `self.byte_addr` instead of the slice pointer address
    fn block_align_mut<'b>(&self, buf: &'b mut [u8]) -> (&'b mut [u8], &'b mut [u8], &'b mut [u8]) {
        let head_len = BLOCK_SIZE - (self.byte_addr as usize % BLOCK_SIZE);
        if head_len > buf.len() {
            (buf, &mut [], &mut [])
        } else {
            let remaining_length = buf.len() - head_len;
            let mid_length = remaining_length - remaining_length % BLOCK_SIZE;
            let (head, remaining) = buf.split_at_mut(head_len);
            let (mid, tail) = remaining.split_at_mut(mid_length);
            (head, mid, tail)
        }
    }
    /// Invalidate the buffer, so later unaligned read/write would reload the buffer from SD card.
    fn invalidate_buffer(&mut self) {
        self.index = BLOCK_SIZE;
    }
    /// Set the base offset of the SD card, to transform from physical address to logical address.
    fn set_base_offset(&mut self, offset: u32) -> IoResult<u64> {
        self.offset = offset;
        self.seek(SeekFrom::Start(0))
    }
    /// Mount fatfs from partition entry, and return the fatfs object if success.
    /// This takes the ownership of self, so currently there is no way to recover from an error,
    /// except creating a new SD card instance.
    pub fn mount_fatfs(mut self, entry: PartitionEntry) -> IoResult<fatfs::FileSystem<Self>> {
        let mut buffer: [u8; 4] = [0; 4];
        self.seek(SeekFrom::Start(0x1FE))?;
        self.read_exact(&mut buffer[..2])?;
        // check MBR signature
        if buffer[..2] != MBR_SIGNATURE {
            return Err(Error::new(
                ErrorKind::InvalidData,
                "Incorrect signature for MBR sector.",
            ));
        }
        // Read partition ID.
        self.seek(SeekFrom::Start(entry as u64 + 0x4))?;
        self.read_exact(&mut buffer[..1])?;
        debug!("Partition ID: {:0X}", buffer[0]);
        match buffer[0] {
            PARTID_FAT12 | PARTID_FAT16_LESS32M | PARTID_FAT16 |
            PARTID_FAT16_LBA | PARTID_FAT32 | PARTID_FAT32_LBA => {}
            _ => {
                return Err(Error::new(
                    ErrorKind::InvalidData,
                    "No FAT partition found for the specified entry.",
                ));
            }
        }
        // Read LBA
        self.seek(SeekFrom::Current(0x3))?;
        self.read_exact(&mut buffer)?;
        let mut lba: u32 = 0;
        // Little endian
        for i in 0..4 {
            lba |= (buffer[i] as u32) << (i * 8);
        }
        // Set to logical address
        self.set_base_offset(lba * BLOCK_SIZE as u32)?;
        // setup fatfs
        fatfs::FileSystem::new(self, fatfs::FsOptions::new())
    }
 }
 impl Read for SdReader {
    fn read(&mut self, buf: &mut [u8]) -> IoResult<usize> {
        let total_length = buf.len();
        let (a, b, c) = self.block_align_mut(buf);
        self.read_unaligned(a)?;
        if b.len() > 0 {
            // invalidate internal buffer
            self.invalidate_buffer();
            if let Err(_) = self.sd.read_block(
                self.byte_addr / BLOCK_SIZE as u32,
                (b.len() / BLOCK_SIZE) as u16,
                b,
            ) {
                // we have to allow partial read, as per the trait required
                return Ok(a.len());
            }
            self.byte_addr += b.len() as u32;
        }
        if let Err(_) = self.read_unaligned(c) {
            // we have to allow partial read, as per the trait required
            return Ok(a.len() + b.len());
        }
        Ok(total_length)
    }
 }
 impl BufRead for SdReader {
    fn fill_buf(&mut self) -> IoResult<&[u8]> {
        if self.index == BLOCK_SIZE {
            // flush the buffer if it is dirty before overwriting it with new data
            if self.dirty {
                self.flush()?;
            }
            // reload buffer
            self.sd
                .read_block(self.byte_addr / (BLOCK_SIZE as u32), 1, &mut self.buffer)
                .map_err(cmd_error_to_io_error)?;
            self.index = (self.byte_addr as usize) % BLOCK_SIZE;
        }
        Ok(&self.buffer[self.index..])
    }
    fn consume(&mut self, amt: usize) {
        self.index += amt;
        self.byte_addr += amt as u32;
    }
 }
 impl Write for SdReader {
    fn write(&mut self, buf: &[u8]) -> IoResult<usize> {
        let (a, b, c) = self.block_align(buf);
        self.write_unaligned(a)?;
        if b.len() > 0 {
            self.flush()?;
            self.invalidate_buffer();
            if let Err(_) = self.sd.write_block(
                self.byte_addr / BLOCK_SIZE as u32,
                (b.len() / BLOCK_SIZE) as u16,
                b,
            ) {
                return Ok(a.len());
            }
            self.byte_addr += b.len() as u32;
        }
        if let Err(_) = self.write_unaligned(c) {
            return Ok(a.len() + b.len());
        }
        Ok(buf.len())
    }
    fn flush(&mut self) -> IoResult<()> {
        if self.dirty {
            let block_addr = (self.byte_addr - self.index as u32) / (BLOCK_SIZE as u32);
            self.sd
                .write_block(block_addr, 1, &self.buffer)
                .map_err(cmd_error_to_io_error)?;
            self.dirty = false;
        }
        Ok(())
    }
 }
 impl Seek for SdReader {
    fn seek(&mut self, pos: SeekFrom) -> IoResult<u64> {
        let raw_target = match pos {
            SeekFrom::Start(x) => self.offset as i64 + x as i64,
            SeekFrom::Current(x) => self.byte_addr as i64 + x,
            SeekFrom::End(_) => panic!("SD card does not support seek from end"),
        };
        if raw_target < self.offset as i64 || raw_target > core::u32::MAX as i64 {
            return Err(Error::new(ErrorKind::InvalidInput, "Invalid address"));
        }
        let target_byte_addr = raw_target as u32;
        let address_same_block =
            self.byte_addr / (BLOCK_SIZE as u32) == target_byte_addr / (BLOCK_SIZE as u32);
        // if the buffer was invalidated, we consider seek as different block
        let same_block = address_same_block && self.index != BLOCK_SIZE;
        if !same_block {
            self.flush()?;
        }
        self.byte_addr = target_byte_addr;
        self.index = if same_block {
            target_byte_addr as usize % BLOCK_SIZE
        } else {
            // invalidate the buffer as we moved to a different block
            BLOCK_SIZE
        };
        Ok((self.byte_addr - self.offset) as u64)
    }
 }
 impl Drop for SdReader {
    fn drop(&mut self) {
        // just try to flush it, ignore error if any
        self.flush().unwrap_or(());
    }
 }
--- a/libcortex_a9/Cargo.toml
+++ b/libcortex_a9/Cargo.toml
@ -1,13 +1,12 @@
 [package]
 name = "libcortex_a9"
 version = "0.0.0"
-authors = ["Astro <astro@spaceboyz.net>"]
+authors = ["M-Labs"]
 edition = "2018"
 [features]
-target_zc706 = []
+power_saving = []
-target_cora_z7_10 = []
+default = []
 default = ["target_zc706"]
 [dependencies]
 bit_field = "0.10"
--- a/libcortex_a9/src/asm.rs
+++ b/libcortex_a9/src/asm.rs
@ -1,35 +1,83 @@
 use core::arch::asm;
 /// The classic no-op
 #[inline]
 pub fn nop() {
-    unsafe { llvm_asm!("nop" :::: "volatile") }
+    unsafe { asm!("nop") }
 }
 /// Wait For Event
 #[inline]
 pub fn wfe() {
-    unsafe { llvm_asm!("wfe" :::: "volatile") }
+    unsafe { asm!("wfe") }
 }
 /// Send Event
 #[inline]
 pub fn sev() {
-    unsafe { llvm_asm!("sev" :::: "volatile") }
+    unsafe { asm!("sev") }
 }
 /// Data Memory Barrier
 #[inline]
 pub fn dmb() {
-    unsafe { llvm_asm!("dmb" :::: "volatile") }
+    unsafe { asm!("dmb") }
 }
 /// Data Synchronization Barrier
 #[inline]
 pub fn dsb() {
-    unsafe { llvm_asm!("dsb" :::: "volatile") }
+    unsafe { asm!("dsb") }
 }
 /// Instruction Synchronization Barrier
 #[inline]
 pub fn isb() {
-    unsafe { llvm_asm!("isb" :::: "volatile") }
+    unsafe { asm!("isb") }
 }
 /// Enable FIQ
 #[inline]
 pub unsafe fn enable_fiq() {
    asm!("cpsie f");
 }
 /// Enable IRQ
 #[inline]
 pub unsafe fn enable_irq() {
    asm!("cpsie i");
 }
 /// Disable IRQ, return if IRQ was originally enabled.
 #[inline]
 pub unsafe fn enter_critical() -> bool {
    let mut cpsr: u32;
    asm!(
        "mrs {}, cpsr
         cpsid i", lateout(reg) cpsr);
    (cpsr & (1 << 7)) == 0
 }
 #[inline]
 pub unsafe fn exit_critical(enable: bool) {
    // https://stackoverflow.com/questions/40019929/temporarily-disable-interrupts-on-arm
    let mask: u32 = if enable {
        1 << 7
    } else {
        0
    };
    asm!(
        "mrs r1, cpsr
         bic r1, r1, {}
         msr cpsr_c, r1"
         , in(reg) mask, out("r1") _);
 }
 /// Exiting IRQ
 #[inline]
 pub unsafe fn exit_irq() {
    asm!("
        mrs r0, SPSR
        msr CPSR, r0
        ", out("r0") _);
 }
--- a/libcortex_a9/src/cache.rs
+++ b/libcortex_a9/src/cache.rs
@ -1,10 +1,12 @@
 use super::asm::{dmb, dsb};
 use super::l2c::*;
 use core::arch::asm;
 /// Invalidate TLBs
 #[inline(always)]
 pub fn tlbiall() {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c8, c7, 0" :: "r" (0) :: "volatile");
+        asm!("mcr p15, 0, {}, c8, c7, 0", in(reg) 0);
    }
 }
@ -12,7 +14,7 @@ pub fn tlbiall() {
 #[inline(always)]
 pub fn iciallu() {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c7, c5, 0" :: "r" (0) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c5, 0", in(reg) 0);
    }
 }
@ -20,7 +22,7 @@ pub fn iciallu() {
 #[inline(always)]
 pub fn bpiall() {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c7, c5, 6" :: "r" (0) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c5, 6", in(reg) 0);
    }
 }
@ -28,7 +30,7 @@ pub fn bpiall() {
 #[inline(always)]
 pub fn dccsw(setway: u32) {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c7, c10, 2" :: "r" (setway) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c10, 2", in(reg) setway);
    }
 }
@ -40,7 +42,7 @@ pub fn dcisw(setway: u32) {
        // also see example code (for DCCISW, but DCISW will be
        // analogous) "Example code for cache maintenance operations"
        // on pages B2-1286 and B2-1287.
-        llvm_asm!("mcr p15, 0, $0, c7, c6, 2" :: "r" (setway) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c6, 2", in(reg) setway);
    }
 }
@ -48,14 +50,13 @@ pub fn dcisw(setway: u32) {
 #[inline(always)]
 pub fn dccisw(setway: u32) {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c7, c14, 2" :: "r" (setway) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c14, 2", in(reg) setway);
    }
 }
 /// A made-up "instruction": invalidate all of the L1 D-Cache
 #[inline(always)]
-pub fn dciall() {
+pub fn dciall_l1() {
    // the cache associativity could be read from a register, but will
    // always be 4 in L1 data cache of a cortex a9
    let ways = 4;
@ -69,7 +70,7 @@ pub fn dciall() {
    // select L1 data cache
    unsafe {
-        llvm_asm!("mcr p15, 2, $0, c0, c0, 0" :: "r" (0) :: "volatile");
+        asm!("mcr p15, 2, {}, c0, c0, 0", in(reg) 0);
    }
    // Invalidate entire D-Cache by iterating every set and every way
@ -80,9 +81,17 @@ pub fn dciall() {
    }
 }
 /// A made-up "instruction": invalidate all of the L1 L2 D-Cache
 #[inline(always)]
 pub fn dciall() {
    dmb();
    l2_cache_invalidate_all();
    dciall_l1();
 }
 /// A made-up "instruction": flush and invalidate all of the L1 D-Cache
 #[inline(always)]
-pub fn dcciall() {
+pub fn dcciall_l1() {
    // the cache associativity could be read from a register, but will
    // always be 4 in L1 data cache of a cortex a9
    let ways = 4;
@ -96,7 +105,7 @@ pub fn dcciall() {
    // select L1 data cache
    unsafe {
-        llvm_asm!("mcr p15, 2, $0, c0, c0, 0" :: "r" (0) :: "volatile");
+        asm!("mcr p15, 2, {}, c0, c0, 0", in(reg) 0);
    }
    // Invalidate entire D-Cache by iterating every set and every way
@ -107,6 +116,15 @@ pub fn dcciall() {
    }
 }
 #[inline(always)]
 pub  fn dcciall() {
    dmb();
    dcciall_l1();
    dsb();
    l2_cache_clean_invalidate_all();
    dcciall_l1();
    dsb();
 }
 const CACHE_LINE: usize = 0x20;
 const CACHE_LINE_MASK: usize = CACHE_LINE - 1;
@ -139,13 +157,22 @@ fn slice_cache_line_addrs<T>(slice: &[T]) -> impl Iterator<Item = usize> {
 #[inline(always)]
 pub fn dccimvac(addr: usize) {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c7, c14, 1" :: "r" (addr) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c14, 1", in(reg) addr);
    }
 }
 /// Data cache clean and invalidate for an object.
 pub fn dcci<T>(object: &T) {
    // ref: L2C310 TRM 3.3.10
    dmb();
    for addr in object_cache_line_addrs(object) {
        dccmvac(addr);
    }
    dsb();
    for addr in object_cache_line_addrs(object) {
        l2_cache_clean_invalidate(addr);
    }
    l2_cache_sync();
    for addr in object_cache_line_addrs(object) {
        dccimvac(addr);
    }
@ -154,6 +181,14 @@ pub fn dcci<T>(object: &T) {
 pub fn dcci_slice<T>(slice: &[T]) {
    dmb();
    for addr in slice_cache_line_addrs(slice) {
        dccmvac(addr);
    }
    dsb();
    for addr in slice_cache_line_addrs(slice) {
        l2_cache_clean_invalidate(addr);
    }
    l2_cache_sync();
    for addr in slice_cache_line_addrs(slice) {
        dccimvac(addr);
    }
@ -164,10 +199,9 @@ pub fn dcci_slice<T>(slice: &[T]) {
 #[inline(always)]
 pub fn dccmvac(addr: usize) {
    unsafe {
-        llvm_asm!("mcr p15, 0, $0, c7, c10, 1" :: "r" (addr) :: "volatile");
+        asm!("mcr p15, 0, {}, c7, c10, 1", in(reg) addr);
    }
 }
 /// Data cache clean for an object.
 pub fn dcc<T>(object: &T) {
    dmb();
@ -175,17 +209,28 @@ pub fn dcc<T>(object: &T) {
        dccmvac(addr);
    }
    dsb();
    for addr in object_cache_line_addrs(object) {
        l2_cache_clean(addr);
    }
    l2_cache_sync();
 }
 /// Data cache clean for an object. Panics if not properly
 /// aligned and properly sized to be contained in an exact number of
 /// cache lines.
 pub fn dcc_slice<T>(slice: &[T]) {
    if slice.len() == 0 {
        return;
    }
    dmb();
    for addr in slice_cache_line_addrs(slice) {
        dccmvac(addr);
    }
    dsb();
    for addr in slice_cache_line_addrs(slice) {
        l2_cache_clean(addr);
    }
    l2_cache_sync();
 }
 /// Data cache invalidate by memory virtual address. This and
@ -194,10 +239,10 @@ pub fn dcc_slice<T>(slice: &[T]) {
 /// affecting more data than intended.
 #[inline(always)]
 pub unsafe fn dcimvac(addr: usize) {
-    llvm_asm!("mcr p15, 0, $0, c7, c6, 1" :: "r" (addr) :: "volatile");
+    asm!("mcr p15, 0, {}, c7, c6, 1", in(reg) addr);
 }
-/// Data cache invalidate for an object.
+/// Data cache clean and invalidate for an object.
 pub unsafe fn dci<T>(object: &mut T) {
    let first_addr = object as *const _ as usize;
    let beyond_addr = (object as *const _ as usize) + core::mem::size_of_val(object);
@ -205,6 +250,10 @@ pub unsafe fn dci<T>(object: &mut T) {
    assert_eq!(beyond_addr & CACHE_LINE_MASK, 0, "dci object beyond_addr must be aligned");
    dmb();
    for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
        l2_cache_invalidate(addr);
    }
    l2_cache_sync();
    for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
        dcimvac(addr);
    }
@ -219,6 +268,10 @@ pub unsafe fn dci_slice<T>(slice: &mut [T]) {
    assert_eq!(beyond_addr & CACHE_LINE_MASK, 0, "dci slice beyond_addr must be aligned");
    dmb();
    for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
        l2_cache_invalidate(addr);
    }
    l2_cache_sync();
    for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
        dcimvac(addr);
    }
--- a/libcortex_a9/src/fpu.rs
+++ b/libcortex_a9/src/fpu.rs
@ -0,0 +1,15 @@
 use core::arch::asm;
 /// Enable FPU in the current core.
 pub fn enable_fpu() {
    unsafe {
        asm!("
            mrc p15, 0, r1, c1, c0, 2
            orr r1, r1, (0b1111<<20)
            mcr p15, 0, r1, c1, c0, 2
            vmrs r1, fpexc
            orr r1, r1, (1<<30)
            vmsr fpexc, r1
            ", out("r1") _);
    }
 }
--- a/libcortex_a9/src/l2c.rs
+++ b/libcortex_a9/src/l2c.rs
@ -0,0 +1,333 @@
 use libregister::{register, register_at, register_bit, register_bits, RegisterRW, RegisterR, RegisterW};
 use super::asm::dmb;
 use volatile_register::RW;
 /// enable L2 cache with specific prefetch offset
 /// prefetch offset requires manual tuning, it seems that 8 is good for ZC706 current settings
 pub fn enable_l2_cache(offset: u8) {
    dmb();
    let regs = RegisterBlock::new();
    // disable L2 cache
    regs.reg1_control.modify(|_, w| w.l2_enable(false));
    regs.reg15_prefetch_ctrl.modify(|_, w|
        w.instr_prefetch_en(true)
            .data_prefetch_en(true)
            .double_linefill_en(true)
            .incr_double_linefill_en(true)
            .pref_drop_en(true)
            .prefetch_offset(offset)
    );
    regs.reg1_aux_control.modify(|_, w| {
        w.early_bresp_en(true)
            .instr_prefetch_en(true)
            .data_prefetch_en(true)
            .cache_replace_policy(true)
            .way_size(3)
    });
    regs.reg1_tag_ram_control.modify(|_, w| w.ram_wr_access_lat(1).ram_rd_access_lat(1).ram_setup_lat(1));
    regs.reg1_data_ram_control.modify(|_, w| w.ram_wr_access_lat(1).ram_rd_access_lat(2).ram_setup_lat(1));
    // invalidate L2 ways
    unsafe {
        regs.reg7_inv_way.write(0xFFFF);
    }
    // poll for completion
    while regs.reg7_cache_sync.read().c() {}
    // write to a magic memory location with a magic sequence
    // required in UG585 Section 3.4.10 Initialization Sequence
    unsafe {
        core::ptr::write_volatile(0xF8000008usize as *mut u32, 0xDF0D);
        core::ptr::write_volatile(0xF8000A1Cusize as *mut u32, 0x020202);
        core::ptr::write_volatile(0xF8000004usize as *mut u32, 0x767B);
    }
    regs.reg1_control.modify(|_, w| w.l2_enable(true));
    dmb();
 }
 #[inline(always)]
 pub fn l2_cache_invalidate_all()  {
    let regs = RegisterBlock::new();
    unsafe {
        regs.reg7_inv_way.write(0xFFFF);
    }
    // poll for completion
    while regs.reg7_cache_sync.read().c() {}
 }
 #[inline(always)]
 pub fn l2_cache_clean_all()  {
    let regs = RegisterBlock::new();
    unsafe  {
        regs.reg7_clean_way.write(0xFFFF);
    }
    // poll for completion
    while regs.reg7_cache_sync.read().c() {}
 }
 #[inline(always)]
 pub fn l2_cache_clean_invalidate_all()  {
    let regs = RegisterBlock::new();
    unsafe {
        regs.reg7_clean_inv_way.write(0xFFFF);
    }
    // poll for completion
    while regs.reg7_cache_sync.read().c() {}
 }
 /// L2 cache sync, similar to dsb for L1 cache
 #[inline(always)]
 pub fn l2_cache_sync() {
    let regs = RegisterBlock::new();
    regs.reg7_cache_sync.write(Reg7CacheSync::zeroed().c(false));
 }
 #[inline(always)]
 pub fn l2_cache_clean(addr: usize) {
    let regs = RegisterBlock::new();
    unsafe {
        regs.reg7_clean_pa.write(addr as u32);
    }
 }
 #[inline(always)]
 pub fn l2_cache_invalidate(addr: usize) {
    let regs = RegisterBlock::new();
    unsafe {
        regs.reg7_inv_pa.write(addr as u32);
    }
 }
 #[inline(always)]
 pub fn l2_cache_clean_invalidate(addr: usize) {
    let regs = RegisterBlock::new();
    unsafe {
        regs.reg7_clean_inv_pa.write(addr as u32);
    }
 }
 #[repr(C)]
 struct RegisterBlock {
    /// cache ID register, Returns the 32-bit device ID code it reads off the CACHEID input bus.
    /// The value is specified by the system integrator. Reset value: 0x410000c8
    pub reg0_cache_id: Reg0CacheId,
    /// cache type register, Returns the 32-bit cache type. Reset value: 0x1c100100
    pub reg0_cache_type: Reg0CacheType,
    unused0: [u32; 62],
    /// control register, reset value: 0x0
    pub reg1_control: Reg1Control,
    /// auxilary control register, reset value: 0x02020000
    pub reg1_aux_control: Reg1AuxControl,
    /// Configures Tag RAM latencies
    pub reg1_tag_ram_control: Reg1TagRamControl,
    /// configures data RAM latencies
    pub reg1_data_ram_control: Reg1DataRamControl,
    unused1: [u32; 60],
    /// Permits the event counters to be enabled and reset.
    pub reg2_ev_counter_ctrl: Reg2EvCounterCtrl,
    /// Enables event counter 1 to be driven by a specific event. Counter 1 increments when the
    /// event occurs.
    pub reg2_ev_counter1_cfg: Reg2EvCounter1Cfg,
    /// Enables event counter 0 to be driven by a specific event. Counter 0 increments when the
    /// event occurs.
    pub reg2_ev_counter0_cfg: Reg2EvCounter0Cfg,
    /// Enable the programmer to read off the counter value. The counter counts an event as
    /// specified by the Counter Configuration Registers. The counter can be preloaded if counting
    /// is disabled and reset by the Event Counter Control Register.
    pub reg2_ev_counter1: RW<u32>,
    /// Enable the programmer to read off the counter value. The counter counts an event as
    /// specified by the Counter Configuration Registers. The counter can be preloaded if counting
    /// is disabled and reset by the Event Counter Control Register.
    pub reg2_ev_counter0: RW<u32>,
    /// This register enables or masks interrupts from being triggered on the external pins of the
    /// cache controller. Figure 3-8 on page 3-17 shows the register bit assignments. The bit
    /// assignments enables the masking of the interrupts on both their individual outputs and the
    /// combined L2CCINTR line. Clearing a bit by writing a 0, disables the interrupt triggering on
    /// that pin. All bits are cleared by a reset. You must write to the register bits with a 1 to
    /// enable the generation of interrupts. 1 = Enabled. 0 = Masked. This is the default.
    pub reg2_int_mask: Reg2IntMask,
    /// This register is a read-only.It returns the masked interrupt status. This register can be
    /// accessed by secure and non-secure operations. The register gives an AND function of the raw
    /// interrupt status with the values of the interrupt mask register. All the bits are cleared
    /// by a reset. A write to this register is ignored. Bits read can be HIGH or LOW: HIGH If the
    /// bits read HIGH, they reflect the status of the input lines triggering an interrupt. LOW If
    /// the bits read LOW, either no interrupt has been generated, or the interrupt is masked.
    pub reg2_int_mask_status: Reg2IntMaskStatus,
    /// The Raw Interrupt Status Register enables the interrupt status that excludes the masking
    /// logic. Bits read can be HIGH or LOW: HIGH If the bits read HIGH, they reflect the status of
    /// the input lines triggering an interrupt. LOW If the bits read LOW, no interrupt has been
    /// generated.
    pub reg2_int_raw_status: Reg2IntRawStatus,
    /// Clears the Raw Interrupt Status Register bits. When a bit is written as 1, it clears the
    /// corresponding bit in the Raw Interrupt Status Register. When a bit is written as 0, it has
    /// no effect
    pub reg2_int_clear: Reg2IntClear,
    unused2: [u32; 323],
    /// Drain the STB. Operation complete when all buffers, LRB, LFB, STB, and EB, are empty
    pub reg7_cache_sync: Reg7CacheSync,
    unused3: [u32; 15],
    /// Invalidate Line by PA: Specific L2 cache line is marked as not valid
    pub reg7_inv_pa: RW<u32>,
    unused4: [u32; 2],
    /// Invalidate by Way Invalidate all data in specified ways, including dirty data. An
    /// Invalidate by way while selecting all cache ways is equivalent to invalidating all cache
    /// entries. Completes as a background task with the way, or ways, locked, preventing
    /// allocation.
    pub reg7_inv_way: RW<u32>,
    unused5: [u32; 12],
    /// Clean Line by PA Write the specific L2 cache line to L3 main memory if the line is marked
    /// as valid and dirty. The line is marked as not dirty. The valid bit is unchanged
    pub reg7_clean_pa: RW<u32>,
    unused6: [u32; 1],
    /// Clean Line by Set/Way Write the specific L2 cache line within the specified way to L3 main
    /// memory if the line is marked as valid and dirty. The line is marked as not dirty. The valid
    /// bit is unchanged
    pub reg7_clean_index: Reg7CleanIndex,
    /// Clean by Way Writes each line of the specified L2 cache ways to L3 main memory if the line
    /// is marked as valid and dirty. The lines are marked as not dirty. The valid bits are
    /// unchanged. Completes as a background task with the way, or ways, locked, preventing
    /// allocation.
    pub reg7_clean_way: RW<u32>,
    unused7: [u32; 12],
    /// Clean and Invalidate Line by PA Write the specific L2 cache line to L3 main memory if the
    /// line is marked as valid and dirty. The line is marked as not valid
    pub reg7_clean_inv_pa: RW<u32>,
    unused8: [u32; 1],
    /// Clean and Invalidate Line by Set/Way Write the specific L2 cache line within the specified
    /// way to L3 main memory if the line is marked as valid and dirty. The line is marked as not
    /// valid
    pub reg7_clean_inv_index: Reg7CleanInvIndex,
    /// Clean and Invalidate by Way Writes each line of the specified L2 cache ways to L3 main
    /// memory if the line is marked as valid and dirty. The lines are marked as not valid.
    /// Completes as a background task with the way, or ways, locked, preventing allocation.
    pub reg7_clean_inv_way: RW<u32>,
    unused9: [u32; 0x1D8],
    pub reg15_prefetch_ctrl: Reg15PrefetechCtrl,
 }
 register_at!(RegisterBlock, 0xF8F02000, new);
 register!(reg0_cache_id, Reg0CacheId, RW, u32);
 register_bits!(reg0_cache_id, implementer, u8, 24, 31);
 register_bits!(reg0_cache_id, cache_id, u8, 10, 15);
 register_bits!(reg0_cache_id, part_num, u8, 6, 9);
 register_bits!(reg0_cache_id, rtl_release, u8, 0, 5);
 register!(reg0_cache_type, Reg0CacheType, RW, u32);
 register_bit!(reg0_cache_type, data_banking, 31);
 register_bits!(reg0_cache_type, ctype, u8, 25, 28);
 register_bit!(reg0_cache_type, h, 24);
 register_bits!(reg0_cache_type, dsize_middsize_19, u8, 20, 22);
 register_bit!(reg0_cache_type, l2_assoc_d, 18);
 register_bits!(reg0_cache_type, l2cache_line_len_disize_11, u8, 12, 13);
 register_bits!(reg0_cache_type, isize_midisize_7, u8, 8, 10);
 register_bit!(reg0_cache_type, l2_assoc_i, 6);
 register_bits!(reg0_cache_type, l2cache_line_len_i, u8, 0, 1);
 register!(reg1_control, Reg1Control, RW, u32);
 register_bit!(reg1_control, l2_enable, 0);
 register!(reg1_aux_control, Reg1AuxControl, RW, u32);
 register_bit!(reg1_aux_control, early_bresp_en, 30);
 register_bit!(reg1_aux_control, instr_prefetch_en, 29);
 register_bit!(reg1_aux_control, data_prefetch_en, 28);
 register_bit!(reg1_aux_control, nonsec_inte_access_ctrl, 27);
 register_bit!(reg1_aux_control, nonsec_lockdown_en, 26);
 register_bit!(reg1_aux_control, cache_replace_policy, 25);
 register_bits!(reg1_aux_control, force_write_alloc, u8, 23, 24);
 register_bit!(reg1_aux_control, shared_attr_override_en, 22);
 register_bit!(reg1_aux_control, parity_en, 21);
 register_bit!(reg1_aux_control, event_mon_bus_en, 20);
 register_bits!(reg1_aux_control, way_size, u8, 17, 19);
 register_bit!(reg1_aux_control, associativity, 16);
 register_bit!(reg1_aux_control, shared_attr_inva_en, 13);
 register_bit!(reg1_aux_control, ex_cache_config, 12);
 register_bit!(reg1_aux_control, store_buff_dev_lim_en, 11);
 register_bit!(reg1_aux_control, high_pr_so_dev_rd_en, 10);
 register_bit!(reg1_aux_control, full_line_zero_enable, 0);
 register!(reg1_tag_ram_control, Reg1TagRamControl, RW, u32);
 register_bits!(reg1_tag_ram_control, ram_wr_access_lat, u8, 8, 10);
 register_bits!(reg1_tag_ram_control, ram_rd_access_lat, u8, 4, 6);
 register_bits!(reg1_tag_ram_control, ram_setup_lat, u8, 0, 2);
 register!(reg1_data_ram_control, Reg1DataRamControl, RW, u32);
 register_bits!(reg1_data_ram_control, ram_wr_access_lat, u8, 8, 10);
 register_bits!(reg1_data_ram_control, ram_rd_access_lat, u8, 4, 6);
 register_bits!(reg1_data_ram_control, ram_setup_lat, u8, 0, 2);
 register!(reg2_ev_counter_ctrl, Reg2EvCounterCtrl, RW, u32);
 register_bit!(reg2_ev_counter_ctrl, ev_ctr_en, 0);
 register!(reg2_ev_counter1_cfg, Reg2EvCounter1Cfg, RW, u32);
 register_bits!(reg2_ev_counter1_cfg, ctr_ev_src, u8, 2, 5);
 register_bits!(reg2_ev_counter1_cfg, ev_ctr_intr_gen, u8, 0, 1);
 register!(reg2_ev_counter0_cfg, Reg2EvCounter0Cfg, RW, u32);
 register_bits!(reg2_ev_counter0_cfg, ctr_ev_src, u8, 2, 5);
 register_bits!(reg2_ev_counter0_cfg, ev_ctr_intr_gen, u8, 0, 1);
 register!(reg2_int_mask, Reg2IntMask, RW, u32);
 register_bit!(reg2_int_mask, decerr, 8);
 register_bit!(reg2_int_mask, slverr, 7);
 register_bit!(reg2_int_mask, errrd, 6);
 register_bit!(reg2_int_mask, errrt, 5);
 register_bit!(reg2_int_mask, errwd, 4);
 register_bit!(reg2_int_mask, errwt, 3);
 register_bit!(reg2_int_mask, parrd, 2);
 register_bit!(reg2_int_mask, parrt, 1);
 register_bit!(reg2_int_mask, ecntr, 0);
 register!(reg2_int_mask_status, Reg2IntMaskStatus, RW, u32);
 register_bit!(reg2_int_mask_status, decerr, 8);
 register_bit!(reg2_int_mask_status, slverr, 7);
 register_bit!(reg2_int_mask_status, errrd, 6);
 register_bit!(reg2_int_mask_status, errrt, 5);
 register_bit!(reg2_int_mask_status, errwd, 4);
 register_bit!(reg2_int_mask_status, errwt, 3);
 register_bit!(reg2_int_mask_status, parrd, 2);
 register_bit!(reg2_int_mask_status, parrt, 1);
 register_bit!(reg2_int_mask_status, ecntr, 0);
 register!(reg2_int_raw_status, Reg2IntRawStatus, RW, u32);
 register_bit!(reg2_int_raw_status, decerr, 8);
 register_bit!(reg2_int_raw_status, slverr, 7);
 register_bit!(reg2_int_raw_status, errrd, 6);
 register_bit!(reg2_int_raw_status, errrt, 5);
 register_bit!(reg2_int_raw_status, errwd, 4);
 register_bit!(reg2_int_raw_status, errwt, 3);
 register_bit!(reg2_int_raw_status, parrd, 2);
 register_bit!(reg2_int_raw_status, parrt, 1);
 register_bit!(reg2_int_raw_status, ecntr, 0);
 register!(reg2_int_clear, Reg2IntClear, RW, u32, 0);
 register_bit!(reg2_int_clear, decerr, 8, WTC);
 register_bit!(reg2_int_clear, slverr, 7, WTC);
 register_bit!(reg2_int_clear, errrd, 6, WTC);
 register_bit!(reg2_int_clear, errrt, 5, WTC);
 register_bit!(reg2_int_clear, errwd, 4, WTC);
 register_bit!(reg2_int_clear, errwt, 3, WTC);
 register_bit!(reg2_int_clear, parrd, 2, WTC);
 register_bit!(reg2_int_clear, parrt, 1, WTC);
 register_bit!(reg2_int_clear, ecntr, 0, WTC);
 register!(reg7_cache_sync, Reg7CacheSync, RW, u32);
 register_bit!(reg7_cache_sync, c, 0);
 register!(reg7_clean_index, Reg7CleanIndex, RW, u32);
 register_bits!(reg7_clean_index, way, u8, 28, 30);
 register_bits!(reg7_clean_index, index, u8, 5, 11);
 register_bit!(reg7_clean_index, c, 0);
 register!(reg7_clean_inv_index, Reg7CleanInvIndex, RW, u32);
 register_bits!(reg7_clean_inv_index, way, u8, 28, 30);
 register_bits!(reg7_clean_inv_index, index, u8, 5, 11);
 register_bit!(reg7_clean_inv_index, c, 0);
 register!(reg15_prefetch_ctrl, Reg15PrefetechCtrl, RW, u32);
 register_bit!(reg15_prefetch_ctrl, double_linefill_en, 30);
 register_bit!(reg15_prefetch_ctrl, instr_prefetch_en, 29);
 register_bit!(reg15_prefetch_ctrl, data_prefetch_en, 28);
 register_bit!(reg15_prefetch_ctrl, pref_drop_en, 24);
 register_bit!(reg15_prefetch_ctrl, incr_double_linefill_en, 23);
 register_bits!(reg15_prefetch_ctrl, prefetch_offset, u8, 0, 4);
--- a/libcortex_a9/src/lib.rs
+++ b/libcortex_a9/src/lib.rs
@ -1,17 +1,85 @@
 #![no_std]
 #![feature(llvm_asm, global_asm)]
 #![feature(never_type)]
 #![feature(global_asm)]
 #![feature(asm)]
 #![allow(incomplete_features)]
 #![feature(inline_const)]
 #![feature(const_fn_trait_bound)]
 extern crate alloc;
 pub mod asm;
 pub mod regs;
 pub mod cache;
 mod fpu;
 pub mod l2c;
 pub mod mmu;
 pub mod mutex;
 pub mod regs;
 pub mod semaphore;
 pub mod sync_channel;
 mod uncached;
 pub use fpu::enable_fpu;
 pub use uncached::UncachedSlice;
-pub mod pl310;
+use core::arch::global_asm;
 global_asm!(include_str!("exceptions.s"));
 #[inline]
 pub fn spin_lock_yield() {
    #[cfg(feature = "power_saving")]
    asm::wfe();
 }
 #[inline]
 pub fn notify_spin_lock() {
    #[cfg(feature = "power_saving")]
    {
        asm::dsb();
        asm::sev();
    }
 }
 #[macro_export]
 /// Interrupt handler, which setup the stack and preserve registers before jumping to actual interrupt handler.
 /// Registers r0-r12, PC, SP and CPSR are restored after the actual handler.
 /// 
 /// - `name` is the name of the interrupt, should be the same as the one defined in vector table.
 /// - `name2` is the name for the actual handler, should be different from name.
 /// - `stack0` is the stack for the interrupt handler when called from core0.
 /// - `stack1` is the stack for the interrupt handler when called from core1.
 /// - `body` is the body of the actual interrupt handler, should be a normal unsafe rust function
 /// body.
 ///
 /// Note that the interrupt handler would use the same stack as normal programs by default.
 macro_rules! interrupt_handler {
    ($name:ident, $name2:ident, $stack0:ident, $stack1:ident, $body:block) => {
        #[link_section = ".text.boot"]
        #[no_mangle]
        #[naked]
        pub unsafe extern "C" fn $name() -> ! {
            asm!(
                // setup SP, depending on CPU 0 or 1
                // and preserve registers
                "sub lr, lr, #4",
                "stmfd sp!, {{r0-r12, lr}}",
                "mrc p15, #0, r0, c0, c0, #5",
                concat!("movw r1, :lower16:", stringify!($stack0)),
                concat!("movt r1, :upper16:", stringify!($stack0)),
                "tst r0, #3",
                concat!("movwne r1, :lower16:", stringify!($stack1)),
                concat!("movtne r1, :upper16:", stringify!($stack1)),
                "mov r0, sp",
                "mov sp, r1",
                "push {{r0, r1}}",                                      // 2 registers are pushed to maintain 8 byte stack alignment 
                concat!("bl ", stringify!($name2)),
                "pop {{r0, r1}}",
                "mov sp, r0",
                "ldmfd sp!, {{r0-r12, pc}}^",                           // caret ^ : copy SPSR to the CPSR  
                options(noreturn)
            );
        }
        #[no_mangle]
        pub unsafe extern "C" fn $name2() $body
    };
 }
--- a/libcortex_a9/src/mmu.rs
+++ b/libcortex_a9/src/mmu.rs
@ -158,7 +158,7 @@ impl L1Table {
                global: true,
                shareable: true,
                access: AccessPermissions::FullAccess,
-                tex: 0b111,
+                tex: 0b0,
                domain: 0b1111,
                exec: true,
                cacheable: true,
@ -213,7 +213,7 @@ impl L1Table {
                access: AccessPermissions::FullAccess,
                tex: 0,
                domain: 0,
-                exec: true,
+                exec: false,
                cacheable: false,
                bufferable: true,
            });
@ -338,7 +338,7 @@ impl L1Table {
        /* 0xfff00000 - 0xffffffff (256K OCM when mapped to high address space) */
        self.direct_mapped_section(0xfff, L1Section {
            global: true,
-            shareable: false,
+            shareable: true,
            access: AccessPermissions::FullAccess,
            tex: 0b100,
            domain: 0,
@ -410,6 +410,7 @@ pub fn with_mmu<F: FnMut() -> !>(l1table: &L1Table, mut f: F) -> ! {
            .a(false)
            .c(true)
            .i(true)
            .z(true)
            .unaligned(true)
    );
--- a/libcortex_a9/src/mutex.rs
+++ b/libcortex_a9/src/mutex.rs
@ -1,20 +1,13 @@
 use core::ops::{Deref, DerefMut};
 use core::sync::atomic::{AtomicU32, Ordering};
 use core::cell::UnsafeCell;
-use super::asm::*;
+use core::task::{Context, Poll};
-
+use core::pin::Pin;
-/// [Power-saving features](http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dht0008a/ch01s03s02.html)
+use core::future::Future;
-#[inline]
+use super::{
-fn wait_for_update() {
+    spin_lock_yield, notify_spin_lock,
-    wfe();
+    asm::{enter_critical, exit_critical}
-}
+};
 /// [Power-saving features](http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dht0008a/ch01s03s02.html)
 #[inline]
 fn signal_update() {
    dsb();
    sev();
 }
 const LOCKED: u32 = 1;
 const UNLOCKED: u32 = 0;
@ -30,6 +23,23 @@ pub struct Mutex<T> {
 unsafe impl<T: Send> Sync for Mutex<T> {}
 unsafe impl<T: Send> Send for Mutex<T> {}
 struct Fut<'a, T>(&'a Mutex<T>);
 impl<'a, T> Future for Fut<'a, T> {
    type Output = MutexGuard<'a, T>;
    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
        let irq = unsafe { enter_critical() };
        if self.0.locked.compare_exchange_weak(UNLOCKED, LOCKED, Ordering::AcqRel, Ordering::Relaxed).is_err() {
            unsafe { exit_critical(irq) };
            cx.waker().wake_by_ref();
            Poll::Pending
        }
        else {
            Poll::Ready(MutexGuard { mutex: self.0, irq })
        }
    }
 }
 impl<T> Mutex<T> {
    /// Constructor, const-fn
    pub const fn new(inner: T) -> Self {
@ -41,18 +51,35 @@ impl<T> Mutex<T> {
    /// Lock the Mutex, blocks when already locked
    pub fn lock(&self) -> MutexGuard<T> {
-        while self.locked.compare_and_swap(UNLOCKED, LOCKED, Ordering::Acquire) != UNLOCKED {
+        let mut irq = unsafe { enter_critical() };
-            wait_for_update();
+        while self.locked.compare_exchange_weak(UNLOCKED, LOCKED, Ordering::AcqRel, Ordering::Relaxed).is_err() {
            unsafe {
                exit_critical(irq);
                spin_lock_yield();
                irq = enter_critical();
            }
        }
        MutexGuard { mutex: self, irq }
    }
    pub async fn async_lock(&self) -> MutexGuard<'_, T> {
        Fut(&self).await
    }
    pub fn try_lock(&self) -> Option<MutexGuard<T>> {
        let irq = unsafe { enter_critical() };
        if self.locked.compare_exchange_weak(UNLOCKED, LOCKED, Ordering::AcqRel, Ordering::Relaxed).is_err() {
            unsafe { exit_critical(irq) };
            None
        } else {
            Some(MutexGuard { mutex: self, irq })
        }
        dmb();
        MutexGuard { mutex: self }
    }
    fn unlock(&self) {
        dmb();
        self.locked.store(UNLOCKED, Ordering::Release);
-        signal_update();
+        notify_spin_lock();
    }
 }
@ -60,6 +87,7 @@ impl<T> Mutex<T> {
 /// `Deref`/`DerefMutx`
 pub struct MutexGuard<'a, T> {
    mutex: &'a Mutex<T>,
    irq: bool,
 }
 impl<'a, T> Deref for MutexGuard<'a, T> {
@ -79,5 +107,6 @@ impl<'a, T> DerefMut for MutexGuard<'a, T> {
 impl<'a, T> Drop for MutexGuard<'a, T> {
    fn drop(&mut self) {
        self.mutex.unlock();
        unsafe { exit_critical(self.irq) };
    }
 }
--- a/libcortex_a9/src/pl310/mod.rs
+++ b/libcortex_a9/src/pl310/mod.rs
@ -1,166 +0,0 @@
 //! L2 cache controller
 use libregister::RegisterW;
 use crate::asm::*;
 mod regs;
 const CACHE_LINE: usize = 0x20;
 const CACHE_LINE_MASK: usize = CACHE_LINE - 1;
 #[inline]
 fn cache_line_addrs(first_addr: usize, beyond_addr: usize) -> impl Iterator<Item = usize> {
    let first_addr = first_addr & !CACHE_LINE_MASK;
    let beyond_addr = (beyond_addr | CACHE_LINE_MASK) + 1;
    (first_addr..beyond_addr).step_by(CACHE_LINE)
 }
 fn object_cache_line_addrs<T>(object: &T) -> impl Iterator<Item = usize> {
    let first_addr = object as *const _ as usize;
    let beyond_addr = (object as *const _ as usize) + core::mem::size_of_val(object);
    cache_line_addrs(first_addr, beyond_addr)
 }
 fn slice_cache_line_addrs<T>(slice: &[T]) -> impl Iterator<Item = usize> {
    let first_addr = &slice[0] as *const _ as usize;
    let beyond_addr = (&slice[slice.len() - 1] as *const _ as usize) +
        core::mem::size_of_val(&slice[slice.len() - 1]);
    cache_line_addrs(first_addr, beyond_addr)
 }
 pub struct L2Cache {
    pub regs: &'static mut regs::RegisterBlock,
 }
 impl L2Cache {
    pub fn new(register_baseaddr: usize) -> Self {
        let regs = unsafe {
            regs::RegisterBlock::new_at(register_baseaddr)
        };
        L2Cache { regs }
    }
    pub fn set_tag_ram_latencies(&mut self, setup_lat: u8, rd_access_lat: u8, wr_access_lat: u8) {
        self.regs.tag_ram_control.write(
            regs::RamControl::zeroed()
                .setup_lat(setup_lat)
                .rd_access_lat(rd_access_lat)
                .wr_access_lat(wr_access_lat)
        );
    }
    pub fn set_data_ram_latencies(&mut self, setup_lat: u8, rd_access_lat: u8, wr_access_lat: u8) {
        self.regs.data_ram_control.write(
            regs::RamControl::zeroed()
                .setup_lat(setup_lat)
                .rd_access_lat(rd_access_lat)
                .wr_access_lat(wr_access_lat)
        );
    }
    pub fn disable_interrupts(&mut self) {
        self.regs.int_mask.write(
            regs::Interrupts::zeroed()
                .ecntr(true)
                .parrt(true)
                .parrd(true)
                .errwt(true)
                .errwd(true)
                .errrt(true)
                .errrd(true)
                .slverr(true)
                .decerr(true)
        );
    }
    pub fn reset_interrupts(&mut self) {
        self.regs.int_clear.write(
            regs::Interrupts::zeroed()
                .ecntr(true)
                .parrt(true)
                .parrd(true)
                .errwt(true)
                .errwd(true)
                .errrt(true)
                .errrd(true)
                .slverr(true)
                .decerr(true)
        );
    }
    pub fn invalidate_all(&mut self) {
        unsafe { self.regs.inv_way.write(0xFFFF); }
        unsafe { self.regs.cache_sync.write(1); }
        while self.regs.cache_sync.read() != 0 {}
    }
    pub fn enable(&mut self) {
        dmb();
        self.regs.control.write(
            regs::Control::zeroed()
                .l2_enable(true)
        );
        dsb();
    }
    pub fn clean_invalidate<T>(&mut self, obj: &T) {
        dmb();
        for addr in object_cache_line_addrs(obj) {
            unsafe {
                self.regs.clean_inv_pa.write(addr as u32);
            }
        }
        dsb();
        unsafe { self.regs.cache_sync.write(1); }
        while self.regs.cache_sync.read() != 0 {}
    }
    pub fn clean_invalidate_slice<T>(&mut self, slice: &[T]) {
        dmb();
        for addr in slice_cache_line_addrs(slice) {
            unsafe {
                self.regs.clean_inv_pa.write(addr as u32);
            }
        }
        dsb();
        unsafe { self.regs.cache_sync.write(1); }
        while self.regs.cache_sync.read() != 0 {}
    }
    pub fn clean_slice<T>(&mut self, slice: &[T]) {
        dmb();
        for addr in slice_cache_line_addrs(slice) {
            unsafe {
                self.regs.clean_pa.write(addr as u32);
            }
        }
        dsb();
        unsafe { self.regs.cache_sync.write(1); }
        while self.regs.cache_sync.read() != 0 {}
    }
    pub fn invalidate<T>(&mut self, obj: &mut T) {
        dmb();
        for addr in object_cache_line_addrs(obj) {
            unsafe {
                self.regs.inv_pa.write(addr as u32);
            }
        }
        dsb();
        unsafe { self.regs.cache_sync.write(1); }
        while self.regs.cache_sync.read() != 0 {}
    }
    pub fn invalidate_slice<T>(&mut self, slice: &mut [T]) {
        dmb();
        for addr in slice_cache_line_addrs(slice) {
            unsafe {
                self.regs.inv_pa.write(addr as u32);
            }
        }
        dsb();
        unsafe { self.regs.cache_sync.write(1); }
        while self.regs.cache_sync.read() != 0 {}
    }
 }
--- a/libcortex_a9/src/pl310/regs.rs
+++ b/libcortex_a9/src/pl310/regs.rs
@ -1,93 +0,0 @@
 use volatile_register::{RO, WO, RW};
 use libregister::{register, register_bit, register_bits, RegisterW};
 #[repr(C)]
 pub struct RegisterBlock {
    pub cache_id: RW<u32>,
    pub cache_type: RW<u32>,
    pub _unused1: [RO<u32>; 62],
    pub control: Control,
    pub aux_control: RW<u32>,
    pub tag_ram_control: RamControl,
    pub data_ram_control: RamControl,
    pub _unused2: [RO<u32>; 60],
    pub ev_counter_ctrl: RW<u32>,
    pub ev_counter1_cfg: RW<u32>,
    pub ev_counter2_cfg: RW<u32>,
    pub ev_counter1: RW<u32>,
    pub ev_counter2: RW<u32>,
    pub int_mask: Interrupts,
    pub int_mask_status: Interrupts,
    pub int_raw_status: Interrupts,
    pub int_clear: Interrupts,
    pub _unused3: [RO<u32>; 323],
    pub cache_sync: RW<u32>,
    pub _unused4: [RO<u32>; 15],
    pub inv_pa: RW<u32>,
    pub _unused5: [RO<u32>; 2],
    pub inv_way: RW<u32>,
    pub _unused6: [RO<u32>; 12],
    pub clean_pa: RW<u32>,
    pub _unused7: [RO<u32>; 1],
    pub clean_index: RW<u32>,
    pub clean_way: RW<u32>,
    pub _unused8: [RO<u32>; 12],
    pub clean_inv_pa: RW<u32>,
    pub _unused9: [RO<u32>; 1],
    pub clean_inv_index: RW<u32>,
    pub clean_inv_way: RW<u32>,
    pub _unused10: [RO<u32>; 64],
    pub d_lockdown0: RW<u32>,
    pub i_lockdown0: RW<u32>,
    pub d_lockdown1: RW<u32>,
    pub i_lockdown1: RW<u32>,
    pub d_lockdown2: RW<u32>,
    pub i_lockdown2: RW<u32>,
    pub d_lockdown3: RW<u32>,
    pub i_lockdown3: RW<u32>,
    pub d_lockdown4: RW<u32>,
    pub i_lockdown4: RW<u32>,
    pub d_lockdown5: RW<u32>,
    pub i_lockdown5: RW<u32>,
    pub d_lockdown6: RW<u32>,
    pub i_lockdown6: RW<u32>,
    pub d_lockdown7: RW<u32>,
    pub i_lockdown7: RW<u32>,
    pub _unused11: [RO<u32>; 4],
    pub lock_line_en: RW<u32>,
    pub unlock_way: RW<u32>,
    pub _unused12: [RO<u32>; 170],
    pub addr_filtering_start: RW<u32>,
    pub addr_filtering_end: RW<u32>,
    pub _unused13: [RO<u32>; 206],
    pub debug_ctrl: RW<u32>,
    pub _unused14: [RO<u32>; 7],
    pub prefetch_ctrl: RW<u32>,
    pub _unused15: [RO<u32>; 7],
    pub power_ctrl: RW<u32>,
 }
 impl RegisterBlock {
    pub unsafe fn new_at(baseaddr: usize) -> &'static mut Self {
        &mut *(baseaddr as *mut _)
    }
 }
 register!(control, Control, RW, u32);
 register_bit!(control, l2_enable, 0);
 register!(ram_control, RamControl, RW, u32);
 register_bits!(ram_control, setup_lat, u8, 0, 2);
 register_bits!(ram_control, rd_access_lat, u8, 4, 6);
 register_bits!(ram_control, wr_access_lat, u8, 8, 10);
 register!(interrupts, Interrupts, RW, u32);
 register_bit!(interrupts, ecntr, 0);
 register_bit!(interrupts, parrt, 1);
 register_bit!(interrupts, parrd, 2);
 register_bit!(interrupts, errwt, 3);
 register_bit!(interrupts, errwd, 4);
 register_bit!(interrupts, errrt, 5);
 register_bit!(interrupts, errrd, 6);
 register_bit!(interrupts, slverr, 7);
 register_bit!(interrupts, decerr, 8);
--- a/libcortex_a9/src/regs.rs
+++ b/libcortex_a9/src/regs.rs
@ -2,6 +2,7 @@ use libregister::{
    register_bit, register_bits,
    RegisterR, RegisterW, RegisterRW,
 };
 use core::arch::asm;
 macro_rules! def_reg_r {
    ($name:tt, $type: ty, $asm_instr:tt) => {
@ -11,7 +12,7 @@ macro_rules! def_reg_r {
            #[inline]
            fn read(&self) -> Self::R {
                let mut value: u32;
-                unsafe { llvm_asm!($asm_instr : "=r" (value) ::: "volatile") }
+                unsafe { asm!($asm_instr, lateout(reg) value) }
                value.into()
            }
        }
@ -26,7 +27,7 @@ macro_rules! def_reg_w {
            #[inline]
            fn write(&mut self, value: Self::W) {
                let value: u32 = value.into();
-                unsafe { llvm_asm!($asm_instr :: "r" (value) :: "volatile") }
+                unsafe { asm!($asm_instr, in(reg) value) }
            }
            #[inline]
@ -71,39 +72,50 @@ macro_rules! wrap_reg {
 /// Stack Pointer
 pub struct SP;
-def_reg_r!(SP, u32, "mov $0, sp");
+def_reg_r!(SP, u32, "mov {}, sp");
-def_reg_w!(SP, u32, "mov sp, $0");
+def_reg_w!(SP, u32, "mov sp, {}");
 /// Link register (function call return address)
 pub struct LR;
-def_reg_r!(LR, u32, "mov $0, lr");
+def_reg_r!(LR, u32, "mov {}, lr");
-def_reg_w!(LR, u32, "mov lr, $0");
+def_reg_w!(LR, u32, "mov lr, {}");
 pub struct VBAR;
-def_reg_r!(VBAR, u32, "mrc p15, 0, $0, c12, c0, 0");
+def_reg_r!(VBAR, u32, "mrc p15, 0, {}, c12, c0, 0");
-def_reg_w!(VBAR, u32, "mcr p15, 0, $0, c12, c0, 0");
+def_reg_w!(VBAR, u32, "mcr p15, 0, {}, c12, c0, 0");
 pub struct MVBAR;
-def_reg_r!(MVBAR, u32, "mrc p15, 0, $0, c12, c0, 1");
+def_reg_r!(MVBAR, u32, "mrc p15, 0, {}, c12, c0, 1");
-def_reg_w!(MVBAR, u32, "mcr p15, 0, $0, c12, c0, 1");
+def_reg_w!(MVBAR, u32, "mcr p15, 0, {}, c12, c0, 1");
 pub struct HVBAR;
-def_reg_r!(HVBAR, u32, "mrc p15, 4, $0, c12, c0, 0");
+def_reg_r!(HVBAR, u32, "mrc p15, 4, {}, c12, c0, 0");
-def_reg_w!(HVBAR, u32, "mcr p15, 4, $0, c12, c0, 0");
+def_reg_w!(HVBAR, u32, "mcr p15, 4, {}, c12, c0, 0");
 /// Multiprocess Affinity Register
 pub struct MPIDR;
-def_reg_r!(MPIDR, u32, "mrc p15, 0, $0, c0, c0, 5");
+def_reg_r!(MPIDR, mpidr::Read, "mrc p15, 0, {}, c0, c0, 5");
 wrap_reg!(mpidr);
 register_bits!(mpidr,
               /// CPU core index
               cpu_id, u8, 0, 1);
 register_bits!(mpidr,
               /// Processor index in "multi-socket" systems
               cluster_id, u8, 8, 11);
 register_bit!(mpidr,
              /// true if part of uniprocessor system
              u, 30);
 pub struct DFAR;
-def_reg_r!(DFAR, u32, "mrc p15, 0, $0, c6, c0, 0");
+def_reg_r!(DFAR, u32, "mrc p15, 0, {}, c6, c0, 0");
 pub struct DFSR;
-def_reg_r!(DFSR, u32, "mrc p15, 0, $0, c5, c0, 0");
+def_reg_r!(DFSR, u32, "mrc p15, 0, {}, c5, c0, 0");
 pub struct SCTLR;
 wrap_reg!(sctlr);
-def_reg_r!(SCTLR, sctlr::Read, "mrc p15, 0, $0, c1, c0, 0");
+def_reg_r!(SCTLR, sctlr::Read, "mrc p15, 0, {}, c1, c0, 0");
-def_reg_w!(SCTLR, sctlr::Write, "mcr p15, 0, $0, c1, c0, 0");
+def_reg_w!(SCTLR, sctlr::Write, "mcr p15, 0, {}, c1, c0, 0");
 register_bit!(sctlr,
              /// Enables MMU
              m, 0);
@ -136,14 +148,17 @@ register_bit!(sctlr,
 /// Auxiliary Control Register
 pub struct ACTLR;
 wrap_reg!(actlr);
-def_reg_r!(ACTLR, actlr::Read, "mrc p15, 0, $0, c1, c0, 1");
+def_reg_r!(ACTLR, actlr::Read, "mrc p15, 0, {}, c1, c0, 1");
-def_reg_w!(ACTLR, actlr::Write, "mcr p15, 0, $0, c1, c0, 1");
+def_reg_w!(ACTLR, actlr::Write, "mcr p15, 0, {}, c1, c0, 1");
 // SMP bit
 register_bit!(actlr, parity_on, 9);
 register_bit!(actlr, alloc_one_way, 8);
 register_bit!(actlr, excl, 7);
 register_bit!(actlr, smp, 6);
 register_bit!(actlr, write_full_line_of_zeros, 3);
 register_bit!(actlr, l1_prefetch_enable, 2);
 // L2 cache prefetch hint, in UG585 section 3.4.8
 register_bit!(actlr, l2_prefetch_enable, 1);
 // Cache/TLB maintenance broadcast
 register_bit!(actlr, fw, 0);
@ -159,23 +174,27 @@ impl RegisterRW for ACTLR {
 impl ACTLR {
    pub fn enable_smp(&mut self) {
-        self.modify(|_, w| w.smp(true).fw(true));
+        self.modify(|_, w| w.smp(true).fw(true).alloc_one_way(true));
    }
    pub fn enable_prefetch(&mut self) {
        self.modify(|_, w| w.l1_prefetch_enable(true).l2_prefetch_enable(true))
    }
 }
 /// Domain Access Control Register
 pub struct DACR;
-def_reg_r!(DACR, u32, "mrc p15, 0, $0, c3, c0, 0");
+def_reg_r!(DACR, u32, "mrc p15, 0, {}, c3, c0, 0");
-def_reg_w!(DACR, u32, "mcr p15, 0, $0, c3, c0, 0");
+def_reg_w!(DACR, u32, "mcr p15, 0, {}, c3, c0, 0");
 /// Translation Table Base Register 0
 pub struct TTBR0;
 /// Translation Table Base Register 1
 pub struct TTBR1;
-def_reg_r!(TTBR0, ttbr::Read, "mrc p15, 0, $0, c2, c0, 0");
+def_reg_r!(TTBR0, ttbr::Read, "mrc p15, 0, {}, c2, c0, 0");
-def_reg_w!(TTBR0, ttbr::Write, "mcr p15, 0, $0, c2, c0, 0");
+def_reg_w!(TTBR0, ttbr::Write, "mcr p15, 0, {}, c2, c0, 0");
-def_reg_r!(TTBR1, ttbr::Read, "mrc p15, 0, $0, c2, c0, 1");
+def_reg_r!(TTBR1, ttbr::Read, "mrc p15, 0, {}, c2, c0, 1");
-def_reg_w!(TTBR1, ttbr::Write, "mcr p15, 0, $0, c2, c0, 1");
+def_reg_w!(TTBR1, ttbr::Write, "mcr p15, 0, {}, c2, c0, 1");
 wrap_reg!(ttbr);
 register_bits!(ttbr, table_base, u32, 14, 31);
 register_bit!(ttbr, irgn0, 6);
--- a/libcortex_a9/src/semaphore.rs
+++ b/libcortex_a9/src/semaphore.rs
@ -0,0 +1,71 @@
 use super::{spin_lock_yield, notify_spin_lock};
 use core::{
    task::{Context, Poll},
    pin::Pin,
    future::Future,
    sync::atomic::{AtomicI32, Ordering}
 };
 pub struct Semaphore {
    value: AtomicI32,
    max: i32
 }
 impl Semaphore {
    pub const fn new(value: i32, max: i32) -> Self {
        Semaphore { value: AtomicI32::new(value), max}
    }
    pub fn try_wait(&self) -> Option<()> {
        loop {
            let value = self.value.load(Ordering::Relaxed);
            if value > 0 {
                if self.value.compare_exchange_weak(value, value - 1, Ordering::SeqCst, Ordering::Relaxed).is_ok() {
                    return Some(());
                }
            } else {
                return None;
            }
        }
    }
    pub fn wait(&self) {
        while self.try_wait().is_none() {
            spin_lock_yield();
        }
    }
    pub async fn async_wait(&self) {
        struct Fut<'a>(&'a Semaphore);
        impl Future for Fut<'_> {
            type Output = ();
            fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
                match self.0.try_wait() {
                    Some(_) => Poll::Ready(()),
                    None => {
                        cx.waker().wake_by_ref();
                        Poll::Pending
                    }
                }
            }
        }
        Fut(&self).await
    }
    pub fn signal(&self) {
        loop {
            let value = self.value.load(Ordering::Relaxed);
            if value < self.max {
                if self.value.compare_exchange_weak(value, value + 1, Ordering::SeqCst, Ordering::Relaxed).is_ok() {
                    notify_spin_lock();
                    return;
                }
            } else {
                return;
            }
        }
    }
 }
--- a/libcortex_a9/src/sync_channel.rs
+++ b/libcortex_a9/src/sync_channel.rs
@ -1,115 +1,72 @@
 use core::{
    future::Future,
    pin::Pin,
-    ptr::null_mut,
+    future::Future,
-    sync::atomic::{AtomicPtr, Ordering},
+    sync::atomic::{AtomicPtr, AtomicUsize, Ordering},
    task::{Context, Poll},
 };
-use alloc::{
+use alloc::boxed::Box;
-    boxed::Box,
+use super::{spin_lock_yield, notify_spin_lock};
    sync::Arc,
    vec::Vec,
 };
 use super::asm::*;
-
+pub struct Sender<'a, T> where T: Clone {
-type Channel<T> = Vec<AtomicPtr<T>>;
+    list: &'a [AtomicPtr<T>],
-
+    write: &'a AtomicUsize,
-/// Create a bounded channel
+    read: &'a AtomicUsize,
 ///
 /// Returns `(tx, rx)` where one should be used one the local core,
 /// and the other is to be shared with another core.
 pub fn sync_channel<T>(bound: usize) -> (Sender<T>, Receiver<T>) {
    // allow for bound=0
    let len = bound + 1;
    let mut channel = Vec::with_capacity(len);
    for _ in 0..len {
        channel.push(AtomicPtr::default());
 }
-    let channel = Arc::new(channel);
+pub struct Receiver<'a, T> where T: Clone {
-    let sender = Sender {
+    list: &'a [AtomicPtr<T>],
-        channel: channel.clone(),
+    write: &'a AtomicUsize,
-        pos: 0,
+    read: &'a AtomicUsize,
    };
    let receiver = Receiver {
        channel: channel,
        pos: 0,
    };
    (sender, receiver)
 }
-/// Sending half of a channel
+impl<'a, T> Sender<'a, T> where T: Clone {
-pub struct Sender<T> {
+    pub const fn new(list: &'static [AtomicPtr<T>], write: &'static AtomicUsize, read: &'static AtomicUsize) -> Self {
-    channel: Arc<Channel<T>>,
+        Sender {list, write, read}
    pos: usize,
    }
-impl<T> Sender<T> {
+    pub fn try_send<B: Into<Box<T>>>(&mut self, content: B) -> Result<(), B> {
-    /// Blocking send
+        let write = self.write.load(Ordering::Relaxed);
-    pub fn send<B: Into<Box<T>>>(&mut self, content: B) {
+        if (write + 1) % self.list.len() == self.read.load(Ordering::Acquire) {
-        let ptr = Box::into_raw(content.into());
+            Err(content)
        let entry = &self.channel[self.pos];
        // try to write the new pointer if the current pointer is
        // NULL, retrying while it is not NULL
        while entry.compare_and_swap(null_mut(), ptr, Ordering::Acquire) != null_mut() {
            // power-saving
            wfe();
        }
        dsb();
        // wake power-saving receivers
        sev();
        // advance
        self.pos += 1;
        // wrap
        if self.pos >= self.channel.len() {
            self.pos = 0;
        }
    }
    /// Non-blocking send, handing you back ownership of the content on **failure**
    pub fn try_send<B: Into<Box<T>>>(&mut self, content: B) -> Option<Box<T>> {
        let ptr = Box::into_raw(content.into());
        let entry = &self.channel[self.pos];
        // try to write the new pointer if the current pointer is
        // NULL
        if entry.compare_and_swap(null_mut(), ptr, Ordering::Acquire) == null_mut() {
            dsb();
            // wake power-saving receivers
            sev();
            // advance
            self.pos += 1;
            // wrap
            if self.pos >= self.channel.len() {
                self.pos = 0;
            }
            // success
            None
        } else {
-            let content = unsafe { Box::from_raw(ptr) };
+            let ptr = Box::into_raw(content.into());
-            // failure
+            let entry = &self.list[write];
-            Some(content)
+            let prev = entry.swap(ptr, Ordering::Relaxed);
            // we allow other end get it first
            self.write.store((write + 1) % self.list.len(), Ordering::Release);
            notify_spin_lock();
            if !prev.is_null() {
                unsafe {
                    Box::from_raw(prev);
                }
            }
            Ok(())
        }
    }
    pub fn send<B: Into<Box<T>>>(&mut self, content: B) {
        let mut content = content;
        while let Err(back) = self.try_send(content) {
            content = back;
            spin_lock_yield();
        }
    }
    pub async fn async_send<B: Into<Box<T>>>(&mut self, content: B) {
-        struct Send<'a, T> {
+        struct Send<'a, 'b, T> where T: Clone, 'b: 'a {
-            sender: &'a mut Sender<T>,
+            sender: &'a mut Sender<'b, T>,
-            content: Option<Box<T>>,
+            content: Result<(), Box<T>>,
        }
-        impl<T> Future for Send<'_, T> {
+        impl<T> Future for Send<'_, '_, T> where T: Clone {
            type Output = ();
            fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-                match self.content.take() {
+                match core::mem::replace(&mut self.content, Ok(())) {
-                    Some(content) => {
+                    Err(content) => {
-                        if let Some(content) = self.sender.try_send(content) {
+                        if let Err(content) = self.sender.try_send(content) {
                            // failure
-                            self.content = Some(content);
+                            self.content = Err(content);
                            cx.waker().wake_by_ref();
                            Poll::Pending
                        } else {
@ -117,93 +74,80 @@ impl<T> Sender<T> {
                            Poll::Ready(())
                        }
                    }
-                    None => panic!("Send future polled after success"),
+                    Ok(_) => panic!("Send future polled after success"),
                }
            }
        }
        Send {
            sender: self,
-            content: Some(content.into()),
+            content: Err(content.into()),
        }.await
    }
    /// free all items in the queue. It is the user's responsibility to
    /// ensure no reader is trying to copy the data.
    pub unsafe fn drop_elements(&mut self) {
        for v in self.list.iter() {
            let original = v.swap(core::ptr::null_mut(), Ordering::Relaxed);
            if !original.is_null() {
                Box::from_raw(original);
            }
 /// Receiving half of a channel
 pub struct Receiver<T> {
    channel: Arc<Channel<T>>,
    pos: usize,
 }
 impl<T> Receiver<T> {
    /// Blocking receive
    pub fn recv(&mut self) -> Box<T> {
        let entry = &self.channel[self.pos];
        loop {
            dmb();
            let ptr = entry.swap(null_mut(), Ordering::Release);
            if ptr != null_mut() {
                dsb();
                // wake power-saving senders
                sev();
                let content = unsafe { Box::from_raw(ptr) };
                // advance
                self.pos += 1;
                // wrap
                if self.pos >= self.channel.len() {
                    self.pos = 0;
                }
                return content;
            }
            // power-saving
            wfe();
        }
    }
-    /// Non-blocking receive
+    /// Reset the `sync_channel`, *forget* all items in the queue. Affects both the sender and
-    pub fn try_recv(&mut self) -> Option<Box<T>> {
+    /// receiver.
-        let entry = &self.channel[self.pos];
+    pub unsafe fn reset(&mut self) {
-
+        self.write.store(0, Ordering::Relaxed);
-        dmb();
+        self.read.store(0, Ordering::Relaxed);
-        let ptr = entry.swap(null_mut(), Ordering::Release);
+        for v in self.list.iter() {
-        if ptr != null_mut() {
+            v.store(core::ptr::null_mut(), Ordering::Relaxed);
-            dsb();
+        }
-            // wake power-saving senders
+    }
            sev();
            let content = unsafe { Box::from_raw(ptr) };
            // advance
            self.pos += 1;
            // wrap
            if self.pos >= self.channel.len() {
                self.pos = 0;
 }
-            Some(content)
+impl<'a, T> Receiver<'a, T> where T: Clone {
    pub const fn new(list: &'static [AtomicPtr<T>], write: &'static AtomicUsize, read: &'static AtomicUsize) -> Self {
        Receiver {list, write, read}
    }
    pub fn try_recv(&mut self) -> Result<T, ()> {
        let read = self.read.load(Ordering::Relaxed);
        if read == self.write.load(Ordering::Acquire) {
            Err(())
        } else {
-            None
+            let entry = &self.list[read];
            let data = unsafe {
                // we cannot deallocate the box
                Box::leak(Box::from_raw(entry.load(Ordering::Relaxed)))
            };
            let result = data.clone();
            self.read.store((read + 1) % self.list.len(), Ordering::Release);
            notify_spin_lock();
            Ok(result)
        }
    }
-    pub async fn async_recv(&mut self) -> Box<T> {
+    pub fn recv(&mut self) -> T {
-        struct Recv<'a, T> {
+        loop {
-            receiver: &'a mut Receiver<T>,
+            if let Ok(data) = self.try_recv() {
                return data;
            }
            spin_lock_yield();
        }
    }
-        impl<T> Future for Recv<'_, T> {
+    pub async fn async_recv(&mut self) -> T {
-            type Output = Box<T>;
+        struct Recv<'a, 'b, T> where T: Clone, 'b: 'a {
            receiver: &'a mut Receiver<'b, T>,
        }
        impl<T> Future for Recv<'_, '_, T> where T: Clone {
            type Output = T;
            fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-                if let Some(content) = self.receiver.try_recv() {
+                if let Ok(content) = self.receiver.try_recv() {
                    Poll::Ready(content)
                } else {
                    cx.waker().wake_by_ref();
@ -218,10 +162,28 @@ impl<T> Receiver<T> {
    }
 }
-impl<T> Iterator for Receiver<T> {
+impl<'a, T> Iterator for Receiver<'a, T> where T: Clone {
-    type Item = Box<T>;
+    type Item = T;
    fn next(&mut self) -> Option<Self::Item> {
        Some(self.recv())
    }
 }
 #[macro_export]
 /// Macro for initializing the sync_channel with static buffer and indexes.
 macro_rules! sync_channel {
    ($t: ty, $cap: expr) => {
        {
            use core::sync::atomic::{AtomicUsize, AtomicPtr};
            use $crate::sync_channel::{Sender, Receiver};
            const fn new_atomic() -> AtomicPtr<$t> {
                AtomicPtr::new(core::ptr::null_mut())
            }
            static LIST: [AtomicPtr<$t>; $cap + 1] = [const { new_atomic() }; $cap + 1];
            static WRITE: AtomicUsize = AtomicUsize::new(0);
            static READ: AtomicUsize = AtomicUsize::new(0);
            (Sender::new(&LIST, &WRITE, &READ), Receiver::new(&LIST, &WRITE, &READ))
        }
    };
 }
--- a/libcortex_a9/src/uncached.rs
+++ b/libcortex_a9/src/uncached.rs
@ -2,7 +2,7 @@ use core::{
    ops::{Deref, DerefMut},
    mem::{align_of, size_of},
 };
-use alloc::alloc::{dealloc, Layout, LayoutErr};
+use alloc::alloc::{dealloc, Layout, LayoutError};
 use crate::mmu::{L1_PAGE_SIZE, L1Table};
 pub struct UncachedSlice<T: 'static> {
@ -12,7 +12,7 @@ pub struct UncachedSlice<T: 'static> {
 impl<T> UncachedSlice<T> {
    /// allocates in chunks of 1 MB
-    pub fn new<F: Fn() -> T>(len: usize, default: F) -> Result<Self, LayoutErr> {
+    pub fn new<F: Fn() -> T>(len: usize, default: F) -> Result<Self, LayoutError> {
        // round to full pages
        let size = ((len * size_of::<T>() - 1) | (L1_PAGE_SIZE - 1)) + 1;
        let align = align_of::<T>()
@ -23,12 +23,12 @@ impl<T> UncachedSlice<T> {
        assert_eq!(start & (L1_PAGE_SIZE - 1), 0);
        for page_start in (start..(start + size)).step_by(L1_PAGE_SIZE) {
            // non-shareable device
            L1Table::get()
                .update(page_start as *const (), |l1_section| {
-                    // Shareable Device
+                    l1_section.tex = 0b10;
-                    l1_section.tex = 0b000;
+                    l1_section.cacheable = true;
-                    l1_section.cacheable = false;
+                    l1_section.bufferable = false;
                    l1_section.bufferable = true;
                });
        }
--- a/libregister/Cargo.toml
+++ b/libregister/Cargo.toml
@ -1,7 +1,7 @@
 [package]
 name = "libregister"
 version = "0.0.0"
-authors = ["Astro <astro@spaceboyz.net>"]
+authors = ["M-Labs"]
 edition = "2018"
 [dependencies]
--- a/libregister/src/lib.rs
+++ b/libregister/src/lib.rs
@ -30,8 +30,9 @@ pub trait RegisterRW: RegisterR + RegisterW {
 #[doc(hidden)]
 #[macro_export]
 macro_rules! register_common {
-    ($mod_name: ident, $struct_name: ident, $access: ty, $inner: ty) => (
+    ($mod_name: ident, $(#[$outer:meta])* $struct_name: ident, $access: ty, $inner: ty) => (
        #[repr(C)]
        $(#[$outer])*
        pub struct $struct_name {
            inner: $access,
        }
@ -52,7 +53,7 @@ macro_rules! register_common {
 #[macro_export]
 macro_rules! register_r {
    ($mod_name: ident, $struct_name: ident) => (
-        impl libregister::RegisterR for $struct_name {
+        impl $crate::RegisterR for $struct_name {
            type R = $mod_name::Read;
            #[inline]
@ -67,7 +68,7 @@ macro_rules! register_r {
 #[macro_export]
 macro_rules! register_w {
    ($mod_name: ident, $struct_name: ident) => (
-        impl libregister::RegisterW for $struct_name {
+        impl $crate::RegisterW for $struct_name {
            type W = $mod_name::Write;
            #[inline]
@ -88,7 +89,7 @@ macro_rules! register_w {
 #[macro_export]
 macro_rules! register_rw {
    ($mod_name: ident, $struct_name: ident) => (
-        impl libregister::RegisterRW for $struct_name {
+        impl $crate::RegisterRW for $struct_name {
            #[inline]
            fn modify<F: FnOnce(Self::R, Self::W) -> Self::W>(&mut self, f: F) {
                unsafe {
@ -101,7 +102,7 @@ macro_rules! register_rw {
        }
    );
    ($mod_name: ident, $struct_name: ident, $mask: expr) => (
-        impl libregister::RegisterRW for $struct_name {
+        impl $crate::RegisterRW for $struct_name {
            #[inline]
            fn modify<F: FnOnce(Self::R, Self::W) -> Self::W>(&mut self, f: F) {
                unsafe {
@ -119,7 +120,7 @@ macro_rules! register_rw {
 #[macro_export]
 macro_rules! register_vcell {
    ($mod_name: ident, $struct_name: ident) => (
-        impl libregister::RegisterR for $struct_name {
+        impl $crate::RegisterR for $struct_name {
            type R = $mod_name::Read;
            #[inline]
@ -128,7 +129,7 @@ macro_rules! register_vcell {
                $mod_name::Read { inner }
            }
        }
-        impl libregister::RegisterW for $struct_name {
+        impl $crate::RegisterW for $struct_name {
            type W = $mod_name::Write;
            #[inline]
@ -141,7 +142,7 @@ macro_rules! register_vcell {
                self.inner.set(w.inner);
            }
        }
-        impl libregister::RegisterRW for $struct_name {
+        impl $crate::RegisterRW for $struct_name {
            #[inline]
            fn modify<F: FnOnce(Self::R, Self::W) -> Self::W>(&mut self, f: F) {
                let r = self.read();
@ -157,37 +158,37 @@ macro_rules! register_vcell {
 #[macro_export]
 macro_rules! register {
    // Define read-only register
-    ($mod_name: ident, $struct_name: ident, RO, $inner: ty) => (
+    ($mod_name: ident, $(#[$outer:meta])* $struct_name: ident, RO, $inner: ty) => (
-        libregister::register_common!($mod_name, $struct_name, libregister::RO<$inner>, $inner);
+        $crate::register_common!($mod_name, $(#[$outer])* $struct_name, $crate::RO<$inner>, $inner);
-        libregister::register_r!($mod_name, $struct_name);
+        $crate::register_r!($mod_name, $struct_name);
    );
    // Define write-only register
-    ($mod_name: ident, $struct_name: ident, WO, $inner: ty) => (
+    ($mod_name: ident, $(#[$outer:meta])* $struct_name: ident, WO, $inner: ty) => (
-        libregister::register_common!($mod_name, $struct_name, volatile_register::WO<$inner>, $inner);
+        $crate::register_common!($mod_name, $(#[$outer])* $struct_name, volatile_register::WO<$inner>, $inner);
-        libregister::register_w!($mod_name, $struct_name);
+        $crate::register_w!($mod_name, $struct_name);
    );
    // Define read-write register
-    ($mod_name: ident, $struct_name: ident, RW, $inner: ty) => (
+    ($mod_name: ident, $(#[$outer:meta])* $struct_name: ident, RW, $inner: ty) => (
-        libregister::register_common!($mod_name, $struct_name, volatile_register::RW<$inner>, $inner);
+        $crate::register_common!($mod_name, $(#[$outer])* $struct_name, volatile_register::RW<$inner>, $inner);
-        libregister::register_r!($mod_name, $struct_name);
+        $crate::register_r!($mod_name, $struct_name);
-        libregister::register_w!($mod_name, $struct_name);
+        $crate::register_w!($mod_name, $struct_name);
-        libregister::register_rw!($mod_name, $struct_name);
+        $crate::register_rw!($mod_name, $struct_name);
    );
    // Define read-write register
-    ($mod_name: ident, $struct_name: ident, VolatileCell, $inner: ty) => (
+    ($mod_name: ident, $(#[$outer:meta])* $struct_name: ident, VolatileCell, $inner: ty) => (
-        libregister::register_common!($mod_name, $struct_name, VolatileCell<$inner>, $inner);
+        $crate::register_common!($mod_name, $(#[$outer])* $struct_name, VolatileCell<$inner>, $inner);
-        libregister::register_vcell!($mod_name, $struct_name);
+        $crate::register_vcell!($mod_name, $struct_name);
    );
    // Define read-write register with mask on write (for WTC mixed access.)
-    ($mod_name: ident, $struct_name: ident, RW, $inner: ty, $mask: expr) => (
+    ($mod_name: ident, $(#[$outer:meta])* $struct_name: ident, RW, $inner: ty, $mask: expr) => (
-        libregister::register_common!($mod_name, $struct_name, volatile_register::RW<$inner>, $inner);
+        $crate::register_common!($mod_name, $(#[$outer])* $struct_name, volatile_register::RW<$inner>, $inner);
-        libregister::register_r!($mod_name, $struct_name);
+        $crate::register_r!($mod_name, $struct_name);
-        libregister::register_w!($mod_name, $struct_name);
+        $crate::register_w!($mod_name, $struct_name);
-        libregister::register_rw!($mod_name, $struct_name, $mask);
+        $crate::register_rw!($mod_name, $struct_name, $mask);
    );
 }
--- a/libsupport_zynq/Cargo.toml
+++ b/libsupport_zynq/Cargo.toml
@ -2,17 +2,29 @@
 name = "libsupport_zynq"
 description = "Software support for running in the Zynq PS"
 version = "0.0.0"
-authors = ["Astro <astro@spaceboyz.net>"]
+authors = ["M-Labs"]
 edition = "2018"
 [features]
 target_zc706 = ["libboard_zynq/target_zc706"]
-target_cora_z7_10 = ["libboard_zynq/target_cora_z7_10"]
+target_coraz7 = ["libboard_zynq/target_coraz7"]
 target_ebaz4205 = ["libboard_zynq/target_ebaz4205"]
 target_redpitaya = ["libboard_zynq/target_redpitaya"]
 target_kasli_soc = ["libboard_zynq/target_kasli_soc"]
 panic_handler = []
 dummy_irq_handler = []
 dummy_fiq_handler = []
 alloc_core = []
 default = ["panic_handler", "dummy_irq_handler", "dummy_fiq_handler"]
 [dependencies]
 r0 = "1"
-compiler_builtins = "0.1"
+compiler_builtins = "=0.1.49"
-linked_list_allocator = { version = "0.8", default-features = false }
+linked_list_allocator = { version = "0.8", default-features = false, features = ["const_mut_refs"] }
 libregister = { path = "../libregister" }
 libcortex_a9 = { path = "../libcortex_a9" }
 libboard_zynq = { path = "../libboard_zynq" }
 [build-dependencies]
 cc = { version = "1.0" }
--- a/libsupport_zynq/build.rs
+++ b/libsupport_zynq/build.rs
@ -0,0 +1,24 @@
 fn main() {
    println!("cargo:rerun-if-changed=build.rs");
    compile_memcpy();
 }
 fn compile_memcpy() {
    use std::path::Path;
    extern crate cc;
    let cfg = &mut cc::Build::new();
    cfg.compiler("clang");
    cfg.no_default_flags(true);
    cfg.warnings(false);
    cfg.flag("--target=armv7-none-eabihf");
    let sources = vec![
        "memcpy.S",
    ];
    let root = Path::new("src/asm");
    for src in sources {
        println!("cargo:rerun-if-changed={}", src);
        cfg.file(root.join(src));
    }
    cfg.compile("memcpy");
 }
--- a/libsupport_zynq/src/abort.rs
+++ b/libsupport_zynq/src/abort.rs
@ -1,24 +0,0 @@
 use libregister::RegisterR;
 use libcortex_a9::regs::DFSR;
 use libboard_zynq::{println, slcr, stdio};
 #[no_mangle]
 pub unsafe extern "C" fn PrefetchAbort() {
    stdio::drop_uart();
    println!("PrefetchAbort");
    slcr::RegisterBlock::unlocked(|slcr| slcr.soft_reset());
    loop {}
 }
 #[no_mangle]
 pub unsafe extern "C" fn DataAbort() {
    stdio::drop_uart();
    println!("DataAbort");
    println!("DFSR: {:03X}", DFSR.read());
    slcr::RegisterBlock::unlocked(|slcr| slcr.soft_reset());
    loop {}
 }
--- a/libsupport_zynq/src/asm/memcpy.S
+++ b/libsupport_zynq/src/asm/memcpy.S
@ -0,0 +1,626 @@
 /* Copyright (c) 2013, Linaro Limited
   All rights reserved.
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
      * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
      * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
      * Neither the name of Linaro Limited nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   This memcpy routine is optimised for Cortex-A15 cores and takes advantage
   of VFP or NEON when built with the appropriate flags.
   Assumptions:
    ARMv6 (ARMv7-a if using Neon)
    ARM state
    Unaligned accesses
    LDRD/STRD support unaligned word accesses
   If compiled with GCC, this file should be enclosed within following
   pre-processing check:
   if defined (__ARM_ARCH_7A__) && defined (__ARM_FEATURE_UNALIGNED)
 */
 	.syntax unified
 	/* This implementation requires ARM state.  */
 	.arm
 #ifdef __ARM_NEON__
 	.fpu	neon
 	.arch	armv7-a
 # define FRAME_SIZE	4
 # define USE_VFP
 # define USE_NEON
 #elif !defined (__SOFTFP__)
 	.arch	armv6
 	.fpu	vfpv2
 # define FRAME_SIZE	32
 # define USE_VFP
 #else
 	.arch	armv6
 # define FRAME_SIZE    32
 #endif
 /* Old versions of GAS incorrectly implement the NEON align semantics.  */
 #ifdef BROKEN_ASM_NEON_ALIGN
 #define ALIGN(addr, align) addr,:align
 #else
 #define ALIGN(addr, align) addr:align
 #endif
 #define PC_OFFSET	8	/* PC pipeline compensation.  */
 #define INSN_SIZE	4
 /* Call parameters.  */
 #define dstin	r0
 #define src	r1
 #define count	r2
 /* Locals.  */
 #define tmp1	r3
 #define dst	ip
 #define tmp2	r10
 #ifndef USE_NEON
 /* For bulk copies using GP registers.  */
 #define	A_l	r2		/* Call-clobbered.  */
 #define	A_h	r3		/* Call-clobbered.  */
 #define	B_l	r4
 #define	B_h	r5
 #define	C_l	r6
 #define	C_h	r7
 #define	D_l	r8
 #define	D_h	r9
 #endif
 /* Number of lines ahead to pre-fetch data.  If you change this the code
   below will need adjustment to compensate.  */
 #define prefetch_lines	5
 #ifdef USE_VFP
 	.macro	cpy_line_vfp vreg, base
 	vstr	\vreg, [dst, #\base]
 	vldr	\vreg, [src, #\base]
 	vstr	d0, [dst, #\base + 8]
 	vldr	d0, [src, #\base + 8]
 	vstr	d1, [dst, #\base + 16]
 	vldr	d1, [src, #\base + 16]
 	vstr	d2, [dst, #\base + 24]
 	vldr	d2, [src, #\base + 24]
 	vstr	\vreg, [dst, #\base + 32]
 	vldr	\vreg, [src, #\base + prefetch_lines * 64 - 32]
 	vstr	d0, [dst, #\base + 40]
 	vldr	d0, [src, #\base + 40]
 	vstr	d1, [dst, #\base + 48]
 	vldr	d1, [src, #\base + 48]
 	vstr	d2, [dst, #\base + 56]
 	vldr	d2, [src, #\base + 56]
 	.endm
 	.macro	cpy_tail_vfp vreg, base
 	vstr	\vreg, [dst, #\base]
 	vldr	\vreg, [src, #\base]
 	vstr	d0, [dst, #\base + 8]
 	vldr	d0, [src, #\base + 8]
 	vstr	d1, [dst, #\base + 16]
 	vldr	d1, [src, #\base + 16]
 	vstr	d2, [dst, #\base + 24]
 	vldr	d2, [src, #\base + 24]
 	vstr	\vreg, [dst, #\base + 32]
 	vstr	d0, [dst, #\base + 40]
 	vldr	d0, [src, #\base + 40]
 	vstr	d1, [dst, #\base + 48]
 	vldr	d1, [src, #\base + 48]
 	vstr	d2, [dst, #\base + 56]
 	vldr	d2, [src, #\base + 56]
 	.endm
 #endif
 	.macro def_fn f p2align=0
 	.text
 	.p2align \p2align
 	.global \f
 	.type \f, %function
 \f:
 	.endm
 	.global __aeabi_memcpy
 	.global __aeabi_memcpy4
 	.global __aeabi_memcpy8
 	.set __aeabi_memcpy, fast_memcpy
 	.set __aeabi_memcpy4, fast_memcpy
 	.set __aeabi_memcpy8, fast_memcpy
 def_fn fast_memcpy p2align=6
 	mov	dst, dstin	/* Preserve dstin, we need to return it.  */
 	cmp	count, #64
 	bge	.Lcpy_not_short
 	/* Deal with small copies quickly by dropping straight into the
 	   exit block.  */
 .Ltail63unaligned:
 #ifdef USE_NEON
 	and	tmp1, count, #0x38
 	rsb	tmp1, tmp1, #(56 - PC_OFFSET + INSN_SIZE)
 	add	pc, pc, tmp1
 	vld1.8	{d0}, [src]!	/* 14 words to go.  */
 	vst1.8	{d0}, [dst]!
 	vld1.8	{d0}, [src]!	/* 12 words to go.  */
 	vst1.8	{d0}, [dst]!
 	vld1.8	{d0}, [src]!	/* 10 words to go.  */
 	vst1.8	{d0}, [dst]!
 	vld1.8	{d0}, [src]!	/* 8 words to go.  */
 	vst1.8	{d0}, [dst]!
 	vld1.8	{d0}, [src]!	/* 6 words to go.  */
 	vst1.8	{d0}, [dst]!
 	vld1.8	{d0}, [src]!	/* 4 words to go.  */
 	vst1.8	{d0}, [dst]!
 	vld1.8	{d0}, [src]!	/* 2 words to go.  */
 	vst1.8	{d0}, [dst]!
 	tst	count, #4
 	ldrne	tmp1, [src], #4
 	strne	tmp1, [dst], #4
 #else
 	/* Copy up to 15 full words of data.  May not be aligned.  */
 	/* Cannot use VFP for unaligned data.  */
 	and	tmp1, count, #0x3c
 	add	dst, dst, tmp1
 	add	src, src, tmp1
 	rsb	tmp1, tmp1, #(60 - PC_OFFSET/2 + INSN_SIZE/2)
 	/* Jump directly into the sequence below at the correct offset.  */
 	add	pc, pc, tmp1, lsl #1
 	ldr	tmp1, [src, #-60]	/* 15 words to go.  */
 	str	tmp1, [dst, #-60]
 	ldr	tmp1, [src, #-56]	/* 14 words to go.  */
 	str	tmp1, [dst, #-56]
 	ldr	tmp1, [src, #-52]
 	str	tmp1, [dst, #-52]
 	ldr	tmp1, [src, #-48]	/* 12 words to go.  */
 	str	tmp1, [dst, #-48]
 	ldr	tmp1, [src, #-44]
 	str	tmp1, [dst, #-44]
 	ldr	tmp1, [src, #-40]	/* 10 words to go.  */
 	str	tmp1, [dst, #-40]
 	ldr	tmp1, [src, #-36]
 	str	tmp1, [dst, #-36]
 	ldr	tmp1, [src, #-32]	/* 8 words to go.  */
 	str	tmp1, [dst, #-32]
 	ldr	tmp1, [src, #-28]
 	str	tmp1, [dst, #-28]
 	ldr	tmp1, [src, #-24]	/* 6 words to go.  */
 	str	tmp1, [dst, #-24]
 	ldr	tmp1, [src, #-20]
 	str	tmp1, [dst, #-20]
 	ldr	tmp1, [src, #-16]	/* 4 words to go.  */
 	str	tmp1, [dst, #-16]
 	ldr	tmp1, [src, #-12]
 	str	tmp1, [dst, #-12]
 	ldr	tmp1, [src, #-8]	/* 2 words to go.  */
 	str	tmp1, [dst, #-8]
 	ldr	tmp1, [src, #-4]
 	str	tmp1, [dst, #-4]
 #endif
 	lsls	count, count, #31
 	ldrhcs	tmp1, [src], #2
 	ldrbne	src, [src]		/* Src is dead, use as a scratch.  */
 	strhcs	tmp1, [dst], #2
 	strbne	src, [dst]
 	bx	lr
 .Lcpy_not_short:
 	/* At least 64 bytes to copy, but don't know the alignment yet.  */
 	str	tmp2, [sp, #-FRAME_SIZE]!
 	and	tmp2, src, #7
 	and	tmp1, dst, #7
 	cmp	tmp1, tmp2
 	bne	.Lcpy_notaligned
 #ifdef USE_VFP
 	/* Magic dust alert!  Force VFP on Cortex-A9.  Experiments show
 	   that the FP pipeline is much better at streaming loads and
 	   stores.  This is outside the critical loop.  */
 	vmov.f32	s0, s0
 #endif
 	/* SRC and DST have the same mutual 32-bit alignment, but we may
 	   still need to pre-copy some bytes to get to natural alignment.
 	   We bring DST into full 64-bit alignment.  */
 	lsls	tmp2, dst, #29
 	beq	1f
 	rsbs	tmp2, tmp2, #0
 	sub	count, count, tmp2, lsr #29
 	ldrmi	tmp1, [src], #4
 	strmi	tmp1, [dst], #4
 	lsls	tmp2, tmp2, #2
 	ldrhcs	tmp1, [src], #2
 	ldrbne	tmp2, [src], #1
 	strhcs	tmp1, [dst], #2
 	strbne	tmp2, [dst], #1
 1:
 	subs	tmp2, count, #64	/* Use tmp2 for count.  */
 	blt	.Ltail63aligned
 	cmp	tmp2, #512
 	bge	.Lcpy_body_long
 .Lcpy_body_medium:			/* Count in tmp2.  */
 #ifdef USE_VFP
 1:
 	vldr	d0, [src, #0]
 	subs	tmp2, tmp2, #64
 	vldr	d1, [src, #8]
 	vstr	d0, [dst, #0]
 	vldr	d0, [src, #16]
 	vstr	d1, [dst, #8]
 	vldr	d1, [src, #24]
 	vstr	d0, [dst, #16]
 	vldr	d0, [src, #32]
 	vstr	d1, [dst, #24]
 	vldr	d1, [src, #40]
 	vstr	d0, [dst, #32]
 	vldr	d0, [src, #48]
 	vstr	d1, [dst, #40]
 	vldr	d1, [src, #56]
 	vstr	d0, [dst, #48]
 	add	src, src, #64
 	vstr	d1, [dst, #56]
 	add	dst, dst, #64
 	bge	1b
 	tst	tmp2, #0x3f
 	beq	.Ldone
 .Ltail63aligned:			/* Count in tmp2.  */
 	and	tmp1, tmp2, #0x38
 	add	dst, dst, tmp1
 	add	src, src, tmp1
 	rsb	tmp1, tmp1, #(56 - PC_OFFSET + INSN_SIZE)
 	add	pc, pc, tmp1
 	vldr	d0, [src, #-56]	/* 14 words to go.  */
 	vstr	d0, [dst, #-56]
 	vldr	d0, [src, #-48]	/* 12 words to go.  */
 	vstr	d0, [dst, #-48]
 	vldr	d0, [src, #-40]	/* 10 words to go.  */
 	vstr	d0, [dst, #-40]
 	vldr	d0, [src, #-32]	/* 8 words to go.  */
 	vstr	d0, [dst, #-32]
 	vldr	d0, [src, #-24]	/* 6 words to go.  */
 	vstr	d0, [dst, #-24]
 	vldr	d0, [src, #-16]	/* 4 words to go.  */
 	vstr	d0, [dst, #-16]
 	vldr	d0, [src, #-8]	/* 2 words to go.  */
 	vstr	d0, [dst, #-8]
 #else
 	sub	src, src, #8
 	sub	dst, dst, #8
 1:
 	ldrd	A_l, A_h, [src, #8]
 	strd	A_l, A_h, [dst, #8]
 	ldrd	A_l, A_h, [src, #16]
 	strd	A_l, A_h, [dst, #16]
 	ldrd	A_l, A_h, [src, #24]
 	strd	A_l, A_h, [dst, #24]
 	ldrd	A_l, A_h, [src, #32]
 	strd	A_l, A_h, [dst, #32]
 	ldrd	A_l, A_h, [src, #40]
 	strd	A_l, A_h, [dst, #40]
 	ldrd	A_l, A_h, [src, #48]
 	strd	A_l, A_h, [dst, #48]
 	ldrd	A_l, A_h, [src, #56]
 	strd	A_l, A_h, [dst, #56]
 	ldrd	A_l, A_h, [src, #64]!
 	strd	A_l, A_h, [dst, #64]!
 	subs	tmp2, tmp2, #64
 	bge	1b
 	tst	tmp2, #0x3f
 	bne	1f
 	ldr	tmp2,[sp], #FRAME_SIZE
 	bx	lr
 1:
 	add	src, src, #8
 	add	dst, dst, #8
 .Ltail63aligned:			/* Count in tmp2.  */
 	/* Copy up to 7 d-words of data.  Similar to Ltail63unaligned, but
 	   we know that the src and dest are 32-bit aligned so we can use
 	   LDRD/STRD to improve efficiency.  */
 	/* TMP2 is now negative, but we don't care about that.  The bottom
 	   six bits still tell us how many bytes are left to copy.  */
 	and	tmp1, tmp2, #0x38
 	add	dst, dst, tmp1
 	add	src, src, tmp1
 	rsb	tmp1, tmp1, #(56 - PC_OFFSET + INSN_SIZE)
 	add	pc, pc, tmp1
 	ldrd	A_l, A_h, [src, #-56]	/* 14 words to go.  */
 	strd	A_l, A_h, [dst, #-56]
 	ldrd	A_l, A_h, [src, #-48]	/* 12 words to go.  */
 	strd	A_l, A_h, [dst, #-48]
 	ldrd	A_l, A_h, [src, #-40]	/* 10 words to go.  */
 	strd	A_l, A_h, [dst, #-40]
 	ldrd	A_l, A_h, [src, #-32]	/* 8 words to go.  */
 	strd	A_l, A_h, [dst, #-32]
 	ldrd	A_l, A_h, [src, #-24]	/* 6 words to go.  */
 	strd	A_l, A_h, [dst, #-24]
 	ldrd	A_l, A_h, [src, #-16]	/* 4 words to go.  */
 	strd	A_l, A_h, [dst, #-16]
 	ldrd	A_l, A_h, [src, #-8]	/* 2 words to go.  */
 	strd	A_l, A_h, [dst, #-8]
 #endif
 	tst	tmp2, #4
 	ldrne	tmp1, [src], #4
 	strne	tmp1, [dst], #4
 	lsls	tmp2, tmp2, #31		/* Count (tmp2) now dead. */
 	ldrhcs	tmp1, [src], #2
 	ldrbne	tmp2, [src]
 	strhcs	tmp1, [dst], #2
 	strbne	tmp2, [dst]
 .Ldone:
 	ldr	tmp2, [sp], #FRAME_SIZE
 	bx	lr
 .Lcpy_body_long:			/* Count in tmp2.  */
 	/* Long copy.  We know that there's at least (prefetch_lines * 64)
 	   bytes to go.  */
 #ifdef USE_VFP
 	/* Don't use PLD.  Instead, read some data in advance of the current
 	   copy position into a register.  This should act like a PLD
 	   operation but we won't have to repeat the transfer.  */
 	vldr	d3, [src, #0]
 	vldr	d4, [src, #64]
 	vldr	d5, [src, #128]
 	vldr	d6, [src, #192]
 	vldr	d7, [src, #256]
 	vldr	d0, [src, #8]
 	vldr	d1, [src, #16]
 	vldr	d2, [src, #24]
 	add	src, src, #32
 	subs	tmp2, tmp2, #prefetch_lines * 64 * 2
 	blt	2f
 1:
 	cpy_line_vfp	d3, 0
 	cpy_line_vfp	d4, 64
 	cpy_line_vfp	d5, 128
 	add	dst, dst, #3 * 64
 	add	src, src, #3 * 64
 	cpy_line_vfp	d6, 0
 	cpy_line_vfp	d7, 64
 	add	dst, dst, #2 * 64
 	add	src, src, #2 * 64
 	subs	tmp2, tmp2, #prefetch_lines * 64
 	bge	1b
 2:
 	cpy_tail_vfp	d3, 0
 	cpy_tail_vfp	d4, 64
 	cpy_tail_vfp	d5, 128
 	add	src, src, #3 * 64
 	add	dst, dst, #3 * 64
 	cpy_tail_vfp	d6, 0
 	vstr	d7, [dst, #64]
 	vldr	d7, [src, #64]
 	vstr	d0, [dst, #64 + 8]
 	vldr	d0, [src, #64 + 8]
 	vstr	d1, [dst, #64 + 16]
 	vldr	d1, [src, #64 + 16]
 	vstr	d2, [dst, #64 + 24]
 	vldr	d2, [src, #64 + 24]
 	vstr	d7, [dst, #64 + 32]
 	add	src, src, #96
 	vstr	d0, [dst, #64 + 40]
 	vstr	d1, [dst, #64 + 48]
 	vstr	d2, [dst, #64 + 56]
 	add	dst, dst, #128
 	add	tmp2, tmp2, #prefetch_lines * 64
 	b	.Lcpy_body_medium
 #else
 	/* Long copy.  Use an SMS style loop to maximize the I/O
 	   bandwidth of the core.  We don't have enough spare registers
 	   to synthesise prefetching, so use PLD operations.  */
 	/* Pre-bias src and dst.  */
 	sub	src, src, #8
 	sub	dst, dst, #8
 	pld	[src, #8]
 	pld	[src, #72]
 	subs	tmp2, tmp2, #64
 	pld	[src, #136]
 	ldrd	A_l, A_h, [src, #8]
 	strd	B_l, B_h, [sp, #8]
 	ldrd	B_l, B_h, [src, #16]
 	strd	C_l, C_h, [sp, #16]
 	ldrd	C_l, C_h, [src, #24]
 	strd	D_l, D_h, [sp, #24]
 	pld	[src, #200]
 	ldrd	D_l, D_h, [src, #32]!
 	b	1f
 	.p2align	6
 2:
 	pld	[src, #232]
 	strd	A_l, A_h, [dst, #40]
 	ldrd	A_l, A_h, [src, #40]
 	strd	B_l, B_h, [dst, #48]
 	ldrd	B_l, B_h, [src, #48]
 	strd	C_l, C_h, [dst, #56]
 	ldrd	C_l, C_h, [src, #56]
 	strd	D_l, D_h, [dst, #64]!
 	ldrd	D_l, D_h, [src, #64]!
 	subs	tmp2, tmp2, #64
 1:
 	strd	A_l, A_h, [dst, #8]
 	ldrd	A_l, A_h, [src, #8]
 	strd	B_l, B_h, [dst, #16]
 	ldrd	B_l, B_h, [src, #16]
 	strd	C_l, C_h, [dst, #24]
 	ldrd	C_l, C_h, [src, #24]
 	strd	D_l, D_h, [dst, #32]
 	ldrd	D_l, D_h, [src, #32]
 	bcs	2b
 	/* Save the remaining bytes and restore the callee-saved regs.  */
 	strd	A_l, A_h, [dst, #40]
 	add	src, src, #40
 	strd	B_l, B_h, [dst, #48]
 	ldrd	B_l, B_h, [sp, #8]
 	strd	C_l, C_h, [dst, #56]
 	ldrd	C_l, C_h, [sp, #16]
 	strd	D_l, D_h, [dst, #64]
 	ldrd	D_l, D_h, [sp, #24]
 	add	dst, dst, #72
 	tst	tmp2, #0x3f
 	bne	.Ltail63aligned
 	ldr	tmp2, [sp], #FRAME_SIZE
 	bx	lr
 #endif
 .Lcpy_notaligned:
 	pld	[src]
 	pld	[src, #64]
 	/* There's at least 64 bytes to copy, but there is no mutual
 	   alignment.  */
 	/* Bring DST to 64-bit alignment.  */
 	lsls	tmp2, dst, #29
 	pld	[src, #(2 * 64)]
 	beq	1f
 	rsbs	tmp2, tmp2, #0
 	sub	count, count, tmp2, lsr #29
 	ldrmi	tmp1, [src], #4
 	strmi	tmp1, [dst], #4
 	lsls	tmp2, tmp2, #2
 	ldrbne	tmp1, [src], #1
 	ldrhcs	tmp2, [src], #2
 	strbne	tmp1, [dst], #1
 	strhcs	tmp2, [dst], #2
 1:
 	pld	[src, #(3 * 64)]
 	subs	count, count, #64
 	ldrmi	tmp2, [sp], #FRAME_SIZE
 	bmi	.Ltail63unaligned
 	pld	[src, #(4 * 64)]
 #ifdef USE_NEON
 	vld1.8	{d0-d3}, [src]!
 	vld1.8	{d4-d7}, [src]!
 	subs	count, count, #64
 	bmi	2f
 1:
 	pld	[src, #(4 * 64)]
 	vst1.8	{d0-d3}, [ALIGN (dst, 64)]!
 	vld1.8	{d0-d3}, [src]!
 	vst1.8	{d4-d7}, [ALIGN (dst, 64)]!
 	vld1.8	{d4-d7}, [src]!
 	subs	count, count, #64
 	bpl	1b
 2:
 	vst1.8	{d0-d3}, [ALIGN (dst, 64)]!
 	vst1.8	{d4-d7}, [ALIGN (dst, 64)]!
 	ands	count, count, #0x3f
 #else
 	/* Use an SMS style loop to maximize the I/O bandwidth.  */
 	sub	src, src, #4
 	sub	dst, dst, #8
 	subs	tmp2, count, #64	/* Use tmp2 for count.  */
 	ldr	A_l, [src, #4]
 	ldr	A_h, [src, #8]
 	strd	B_l, B_h, [sp, #8]
 	ldr	B_l, [src, #12]
 	ldr	B_h, [src, #16]
 	strd	C_l, C_h, [sp, #16]
 	ldr	C_l, [src, #20]
 	ldr	C_h, [src, #24]
 	strd	D_l, D_h, [sp, #24]
 	ldr	D_l, [src, #28]
 	ldr	D_h, [src, #32]!
 	b	1f
 	.p2align	6
 2:
 	pld	[src, #(5 * 64) - (32 - 4)]
 	strd	A_l, A_h, [dst, #40]
 	ldr	A_l, [src, #36]
 	ldr	A_h, [src, #40]
 	strd	B_l, B_h, [dst, #48]
 	ldr	B_l, [src, #44]
 	ldr	B_h, [src, #48]
 	strd	C_l, C_h, [dst, #56]
 	ldr	C_l, [src, #52]
 	ldr	C_h, [src, #56]
 	strd	D_l, D_h, [dst, #64]!
 	ldr	D_l, [src, #60]
 	ldr	D_h, [src, #64]!
 	subs	tmp2, tmp2, #64
 1:
 	strd	A_l, A_h, [dst, #8]
 	ldr	A_l, [src, #4]
 	ldr	A_h, [src, #8]
 	strd	B_l, B_h, [dst, #16]
 	ldr	B_l, [src, #12]
 	ldr	B_h, [src, #16]
 	strd	C_l, C_h, [dst, #24]
 	ldr	C_l, [src, #20]
 	ldr	C_h, [src, #24]
 	strd	D_l, D_h, [dst, #32]
 	ldr	D_l, [src, #28]
 	ldr	D_h, [src, #32]
 	bcs	2b
 	/* Save the remaining bytes and restore the callee-saved regs.  */
 	strd	A_l, A_h, [dst, #40]
 	add	src, src, #36
 	strd	B_l, B_h, [dst, #48]
 	ldrd	B_l, B_h, [sp, #8]
 	strd	C_l, C_h, [dst, #56]
 	ldrd	C_l, C_h, [sp, #16]
 	strd	D_l, D_h, [dst, #64]
 	ldrd	D_l, D_h, [sp, #24]
 	add	dst, dst, #72
 	ands	count, tmp2, #0x3f
 #endif
 	ldr	tmp2, [sp], #FRAME_SIZE
 	bne	.Ltail63unaligned
 	bx	lr
 	.size	memcpy, . - memcpy
--- a/libsupport_zynq/src/boot.rs
+++ b/libsupport_zynq/src/boot.rs
@ -1,10 +1,11 @@
 use r0::zero_bss;
 use core::ptr::write_volatile;
 use core::arch::asm;
 use libregister::{
    VolatileCell,
-    RegisterR, RegisterW, RegisterRW,
+    RegisterR, RegisterRW,
 };
-use libcortex_a9::{asm, regs::*, cache, mmu};
+use libcortex_a9::{asm, l2c, regs::*, cache, mmu, spin_lock_yield, notify_spin_lock, enable_fpu, interrupt_handler};
 use libboard_zynq::{slcr, mpcore};
 extern "C" {
@ -18,34 +19,28 @@ extern "C" {
 static mut CORE1_ENABLED: VolatileCell<bool> = VolatileCell::new(false);
-#[link_section = ".text.boot"]
+interrupt_handler!(Reset, reset_irq, __stack0_start, __stack1_start, {
-#[no_mangle]
+    // no need to setup stack here, as we already did when entering the handler
-#[naked]
+    match MPIDR.read().cpu_id() {
 pub unsafe extern "C" fn _boot_cores() -> ! {
    const CORE_MASK: u32 = 0x3;
    match MPIDR.read() & CORE_MASK {
        0 => {
            SP.write(&mut __stack0_start as *mut _ as u32);
            boot_core0();
        }
        1 => {
            while !CORE1_ENABLED.get() {
-                asm::wfe();
+                spin_lock_yield();
            }
            SP.write(&mut __stack1_start as *mut _ as u32);
            boot_core1();
        }
        _ => unreachable!(),
    }
-}
+});
 #[naked]
 #[inline(never)]
-unsafe fn boot_core0() -> ! {
+unsafe extern "C" fn boot_core0() -> ! {
    l1_cache_init();
-    let mpcore = mpcore::RegisterBlock::new();
+    enable_fpu();
    let mpcore = mpcore::RegisterBlock::mpcore();
    mpcore.scu_invalidate.invalidate_all_cores();
    zero_bss(&mut __bss_start, &mut __bss_end);
@ -55,30 +50,35 @@ unsafe fn boot_core0() -> ! {
    mmu::with_mmu(mmu_table, || {
        mpcore.scu_control.start();
        ACTLR.enable_smp();
        ACTLR.enable_prefetch();
        // TODO: Barriers reqd when core1 is not yet starting?
        asm::dmb();
        asm::dsb();
        asm::enable_fiq();
        asm::enable_irq();
        main_core0();
        panic!("return from main");
    });
 }
 #[naked]
 #[inline(never)]
-unsafe fn boot_core1() -> ! {
+unsafe extern "C" fn boot_core1() -> ! {
    l1_cache_init();
-    let mpcore = mpcore::RegisterBlock::new();
+    let mpcore = mpcore::RegisterBlock::mpcore();
    mpcore.scu_invalidate.invalidate_core1();
    let mmu_table = mmu::L1Table::get();
    mmu::with_mmu(mmu_table, || {
        ACTLR.enable_smp();
        ACTLR.enable_prefetch();
        // TODO: Barriers reqd when core1 is not yet starting?
        asm::dmb();
        asm::dsb();
        asm::enable_fiq();
        asm::enable_irq();
        main_core1();
        panic!("return from main_core1");
    });
@ -101,7 +101,7 @@ fn l1_cache_init() {
    //       for all of the L1 data cache rather than a (previously
    //       unspecified) combination of one cache set and one cache
    //       way.
-    dciall();
+    dciall_l1();
 }
 pub struct Core1 {
@ -131,12 +131,13 @@ impl Core1 {
        unsafe {
            CORE1_ENABLED.set(true);
        }
        // Ensure values have been written to cache
        asm::dmb();
        // Flush cache-line
-        cache::dccmvac(unsafe { &CORE1_ENABLED } as *const _ as usize);
+        cache::dcc(unsafe { &CORE1_ENABLED });
        if sdram {
            cache::dccmvac(0);
            asm::dsb();
            l2c::l2_cache_clean(0);
            l2c::l2_cache_sync();
        }
        // wake up core1
@ -144,6 +145,7 @@ impl Core1 {
            slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_rst1(false));
            slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_clkstop1(false));
        });
        notify_spin_lock();
        Core1 {}
    }
@ -151,6 +153,8 @@ impl Core1 {
    pub fn disable(&self) {
        unsafe {
            CORE1_ENABLED.set(false);
            cache::dccmvac(&CORE1_ENABLED  as *const _ as usize);
            asm::dsb();
        }
        self.restart();
    }
@ -158,7 +162,9 @@ impl Core1 {
    pub fn restart(&self) {
        slcr::RegisterBlock::unlocked(|slcr| {
            slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_rst1(true));
            slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_clkstop1(true));
            slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_rst1(false));
            slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_clkstop1(false));
        });
    }
 }
--- a/libsupport_zynq/src/exception_vectors.rs
+++ b/libsupport_zynq/src/exception_vectors.rs
@ -0,0 +1,55 @@
 use libregister::{RegisterR, RegisterW};
 use libcortex_a9::{regs::{DFSR, MPIDR, VBAR}, interrupt_handler};
 use libboard_zynq::{println, stdio}; 
 use core::arch::asm;
 pub fn set_vector_table(base_addr: u32){
    VBAR.write(base_addr);
 }
 interrupt_handler!(UndefinedInstruction, undefined_instruction, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("UndefinedInstruction");
    loop {}
 });
 interrupt_handler!(SoftwareInterrupt, software_interrupt, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("SoftwareInterrupt");
    loop {}
 });
 interrupt_handler!(PrefetchAbort, prefetch_abort, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("PrefetchAbort");
    loop {}
 });
 interrupt_handler!(DataAbort, data_abort, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("DataAbort on core {}", MPIDR.read().cpu_id());
    println!("DFSR: {:03X}", DFSR.read());
    loop {}
 });
 interrupt_handler!(ReservedException, reserved_exception, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("ReservedException");
    loop {}
 });
 #[cfg(feature = "dummy_irq_handler")]
 interrupt_handler!(IRQ, irq, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("IRQ");
    loop {}
 });
 #[cfg(feature = "dummy_fiq_handler")]
 interrupt_handler!(FIQ, fiq, __irq_stack0_start, __irq_stack1_start, {
    stdio::drop_uart();
    println!("FIQ");
    loop {}
 });
--- a/libsupport_zynq/src/lib.rs
+++ b/libsupport_zynq/src/lib.rs
@ -1,13 +1,17 @@
 #![no_std]
 #![feature(naked_functions)]
 #![feature(alloc_error_handler)]
 #![feature(panic_info_message)]
 #![feature(naked_functions)]
 #![feature(global_asm)]
 #![feature(asm)]
 pub extern crate alloc;
 pub extern crate compiler_builtins;
 pub mod boot;
-mod abort;
+pub mod exception_vectors;
 #[cfg(feature = "panic_handler")]
 mod panic;
 pub mod ram;
--- a/libsupport_zynq/src/panic.rs
+++ b/libsupport_zynq/src/panic.rs
@ -1,4 +1,6 @@
-use libboard_zynq::{slcr, print, println};
+use libboard_zynq::{print, println};
 #[cfg(feature = "target_kasli_soc")]
 use libboard_zynq::error_led::ErrorLED;
 #[panic_handler]
 fn panic(info: &core::panic::PanicInfo) -> ! {
@ -13,7 +15,10 @@ fn panic(info: &core::panic::PanicInfo) -> ! {
    } else {
        println!("");
    }
-
+    #[cfg(feature = "target_kasli_soc")]
-    slcr::RegisterBlock::unlocked(|slcr| slcr.soft_reset());
+    {
        let mut err_led = ErrorLED::error_led();
        err_led.toggle(true);
    }
    loop {}
 }
--- a/libsupport_zynq/src/ram.rs
+++ b/libsupport_zynq/src/ram.rs
@ -1,55 +1,100 @@
 use alloc::alloc::Layout;
 use core::alloc::GlobalAlloc;
 use core::ptr::NonNull;
-use alloc::alloc::Layout;
+use libcortex_a9::{
    mutex::Mutex,
    regs::MPIDR
 };
 use libregister::RegisterR;
 use linked_list_allocator::Heap;
-use libcortex_a9::mutex::Mutex;
+#[cfg(not(feature = "alloc_core"))]
 use libboard_zynq::ddr::DdrRam;
 #[global_allocator]
-static ALLOCATOR: CortexA9Alloc = CortexA9Alloc(Mutex::new(Heap::empty()));
+static ALLOCATOR: CortexA9Alloc = CortexA9Alloc(
    Mutex::new(Heap::empty()),
    Mutex::new(Heap::empty()),
 );
-/// LockedHeap doesn't lock properly
+struct CortexA9Alloc(Mutex<Heap>, Mutex<Heap>);
 struct CortexA9Alloc(Mutex<Heap>);
 unsafe impl Sync for CortexA9Alloc {}
 unsafe impl GlobalAlloc for CortexA9Alloc {
    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-        self.0.lock()
+        if cfg!(not(feature = "alloc_core")) || MPIDR.read().cpu_id() == 0 {
            &self.0
        } else {
            &self.1
        }
        .lock()
        .allocate_first_fit(layout)
        .ok()
        .map_or(0 as *mut u8, |allocation| allocation.as_ptr())
    }
    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
-        self.0.lock()
+        if cfg!(not(feature = "alloc_core"))
            || ((&__heap0_start as *const usize as usize <= ptr as usize)
                && ((ptr as usize) < &__heap0_end as *const usize as usize))
        {
            &self.0
        } else {
            &self.1
        }
        .lock()
        .deallocate(NonNull::new_unchecked(ptr), layout)
    }
 }
 #[cfg(not(feature = "alloc_core"))]
 pub fn init_alloc_ddr(ddr: &mut DdrRam) {
    unsafe {
-        ALLOCATOR.0.lock()
+        ALLOCATOR
            .0
            .lock()
            .init(ddr.ptr::<u8>() as usize, ddr.size());
    }
 }
 extern "C" {
-    static __heap_start: usize;
+    static __heap0_start: usize;
-    static __heap_end: usize;
+    static __heap0_end: usize;
    #[cfg(feature = "alloc_core")]
    static __heap1_start: usize;
    #[cfg(feature = "alloc_core")]
    static __heap1_end: usize;
 }
-pub fn init_alloc_linker() {
+pub fn init_alloc_core0() {
    unsafe {
-        let start = &__heap_start as *const usize as usize;
+        let start = &__heap0_start as *const usize as usize;
-        let end = &__heap_end as *const usize as usize;
+        let end = &__heap0_end as *const usize as usize;
-        ALLOCATOR.0.lock()
+        ALLOCATOR.0.lock().init(start, end - start);
            .init(start, end - start);
    }
 }
 #[cfg(feature = "alloc_core")]
 pub fn init_alloc_core1() {
    unsafe {
        let start = &__heap1_start as *const usize as usize;
        let end = &__heap1_end as *const usize as usize;
        ALLOCATOR.1.lock().init(start, end - start);
    }
 }
 #[alloc_error_handler]
-fn alloc_error(_: core::alloc::Layout) -> ! {
+fn alloc_error(layout: core::alloc::Layout) -> ! {
-    panic!("alloc_error")
+    let id = MPIDR.read().cpu_id();
    let used = if cfg!(not(feature = "alloc_core")) || id == 0 {
        ALLOCATOR.0.lock().used()
    } else {
        ALLOCATOR.1.lock().used()
    };
    panic!(
        "Core {} alloc_error, layout: {:?}, used memory: {}",
        id,
        layout,
        used
    );
 }
--- a/openocd/common.cfg
+++ b/openocd/common.cfg
@ -0,0 +1,20 @@
 set XC7_JSHUTDOWN 0x0d
 set XC7_JPROGRAM 0x0b
 set XC7_JSTART 0x0c
 set XC7_BYPASS 0x3f
 proc xc7_program {tap} {
    global XC7_JSHUTDOWN XC7_JPROGRAM XC7_JSTART XC7_BYPASS
    irscan $tap $XC7_JSHUTDOWN
    irscan $tap $XC7_JPROGRAM
    runtest 60000
    #JSTART prevents this from working...
    #irscan $tap $XC7_JSTART
    runtest 2000
    irscan $tap $XC7_BYPASS
    runtest 2000
 }
 pld device virtex2 zynq.tap 1
 init
 xc7_program zynq.tap
--- a/openocd/cora-z7-10.cfg
+++ b/openocd/cora-z7-10.cfg
@ -5,37 +5,15 @@ set PL_TAPID 0x13722093
 set SMP 1
 source ./zynq-7000.cfg
 source ./xilinx-tcl.cfg
 source ./ps7_init.tcl
 reset_config srst_only srst_push_pull
-set XC7_JSHUTDOWN 0x0d
+source ./common.cfg
 set XC7_JPROGRAM 0x0b
 set XC7_JSTART 0x0c
 set XC7_BYPASS 0x3f
-proc xc7_program {tap} {
+reset halt
    global XC7_JSHUTDOWN XC7_JPROGRAM XC7_JSTART XC7_BYPASS
    irscan $tap $XC7_JSHUTDOWN
    irscan $tap $XC7_JPROGRAM
    runtest 60000
    #JSTART prevents this from working...
    #irscan $tap $XC7_JSTART
    runtest 2000
    irscan $tap $XC7_BYPASS
    runtest 2000
 }
 pld device virtex2 zynq.tap 1
 init
 xc7_program zynq.tap
 xilinx_ps7_init
 # Disable MMU
 targets $_TARGETNAME_1
-arm mcr 15 0 1 0 0 [expr [arm mrc 15 0 1 0 0] & ~0xd]
+arm mcr 15 0 1 0 0 [expr { [arm mrc 15 0 1 0 0] & ~0xd }]
 targets $_TARGETNAME_0
-arm mcr 15 0 1 0 0 [expr [arm mrc 15 0 1 0 0] & ~0xd]
+arm mcr 15 0 1 0 0 [expr { [arm mrc 15 0 1 0 0] & ~0xd }]
--- a/openocd/digilent-hs2.cfg
+++ b/openocd/digilent-hs2.cfg
@ -0,0 +1,12 @@
 # this is the original file from OpenOCD, but with ftdi_device_desc
 # removed because some cables don't have it programmed.
 # this supports JTAG-HS2 (and apparently Nexys4 as well)
 adapter driver ftdi
 ftdi_vid_pid 0x0403 0x6014
 ftdi_channel 0
 ftdi_layout_init 0x00e8 0x60eb
 reset_config none
--- a/openocd/digilent_jtag_smt2_nc.cfg
+++ b/openocd/digilent_jtag_smt2_nc.cfg
@ -1,18 +0,0 @@
 #
 # Digilent JTAG-SMT2-NC
 #
 # http://store.digilentinc.com/jtag-smt2-nc-surface-mount-programming-module/
 # https://reference.digilentinc.com/_media/jtag_smt2nc/jtag-smt2-nc_rm.pdf
 #
 # Based on reference sheet (above) and Xilinx KCU105 schematics
 # https://www.xilinx.com/products/boards-and-kits/kcu105.html#documentation
 #
 # Note that the digilent_jtag_smt2 layout does not work and hangs while
 # the ftdi_device_desc from digilent_hs2 is wrong.
 interface ftdi
 ftdi_device_desc "Digilent USB Device"
 ftdi_vid_pid 0x0403 0x6014
 ftdi_channel 0
 ftdi_layout_init 0x00e8 0x60eb
 ftdi_layout_signal nSRST -data 0x2000
--- a/openocd/ebaz4205.cfg
+++ b/openocd/ebaz4205.cfg
@ -0,0 +1,33 @@
 # The contents of this file are partially dependend on
 # the adapter that you have. Please modify accordingly.
 adapter driver ftdi
 ftdi vid_pid 0x0403 0x6010
 ftdi channel 0
 # Every pin set as high impedance except TCK, TDI, TDO and TMS
 ftdi layout_init 0x0088 0x008b
 # nSRST defined on pin CN2-13 of the MiniModule (pin ADBUS5 [AD5] on the FT2232H chip)
 # This choice is arbitrary. Use other GPIO pin if desired.
 ftdi layout_signal nSRST -data 0x0020 -oe 0x0020
 transport select jtag
 adapter speed 10000
 set PL_TAPID 0x13722093
 set SMP 1
 source ./zynq-7000.cfg
 reset_config srst_only srst_open_drain
 adapter srst pulse_width 250
 adapter srst delay 400
 source ./common.cfg
 reset halt
 # Disable MMU
 targets $_TARGETNAME_1
 arm mcr 15 0 1 0 0 [expr { [arm mrc 15 0 1 0 0] & ~0xd }]
 targets $_TARGETNAME_0
 arm mcr 15 0 1 0 0 [expr { [arm mrc 15 0 1 0 0] & ~0xd }]
--- a/Show More
+++ b/Show More
		`@ -1 +0,0 @@`
			`nix-shell --command "cargo xbuild --release" && scp -P 2204 -C target/armv7-none-eabihf/release/zc706-experiments $1@nixbld.m-labs.hk:/home/$1/zc706/zc706.elf`
		`@ -1,3 +0,0 @@`
			`//! PrimeCell DMA Controller (PL330)`

			`mod regs;`