fix mmu on core1

.cargo/config

@@ -1,7 +1,7 @@
 [target.armv7-none-eabihf]
 rustflags = [
   "-C", "link-arg=-Tlink.x",
-  "-C", "target-feature=a9,armv7-a,neon",
+  "-C", "target-feature=+a9,+armv7-a,+neon",
   "-C", "target-cpu=cortex-a9",
 ]
 

Cargo.lock

@@ -34,9 +34,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.49"
+version = "0.1.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20b1438ef42c655665a8ab2c1c6d605a305f031d38d9be689ddfef41a20f3aa2"
+checksum = "80873f979f0a344a4ade87c2f70d9ccf5720b83b10c97ec7cd745895d021e85a"
 
 [[package]]
 name = "core_io"

experiments/src/main.rs

@@ -1,8 +1,6 @@
 #![no_std]
 #![no_main]
-#![allow(incomplete_features)]
 #![feature(naked_functions)]
-#![feature(asm)]
 #![feature(inline_const)]
 
 extern crate alloc;

flake.nix

@@ -11,7 +11,7 @@
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ (import rust-overlay) crosspkgs-overlay ]; };
       
-      rust = pkgs.rust-bin.nightly."2021-09-01".default.override {
+      rust = pkgs.rust-bin.nightly."2022-04-01".default.override {
         extensions = [ "rust-src" ];
         targets = [ ];
       };
@@ -113,7 +113,7 @@
           };
         };
 
-        nativeBuildInputs = [ cargo-xbuild pkgs.llvmPackages_13.clang-unwrapped ];
+        nativeBuildInputs = [ cargo-xbuild pkgs.llvmPackages_14.clang-unwrapped ];
         buildPhase = ''
           export XARGO_RUST_SRC="${rust}/lib/rustlib/src/rust/library"
           export CARGO_HOME=$(mktemp -d cargo-home.XXX)
@@ -169,7 +169,7 @@
 
           pkgs.openocd pkgs.gdb
           pkgs.openssh pkgs.rsync
-          pkgs.llvmPackages_13.clang-unwrapped
+          pkgs.llvmPackages_14.clang-unwrapped
           (pkgs.python3.withPackages(ps: [ ps.pyftdi ]))
         ];
       };

libcortex_a9/src/asm.rs

@@ -54,7 +54,7 @@ pub unsafe fn enter_critical() -> bool {
     let mut cpsr: u32;
     asm!(
         "mrs {}, cpsr
-         cpsid i", lateout(reg) cpsr);
+         cpsid i", out(reg) cpsr);
     (cpsr & (1 << 7)) == 0
 }
 

libcortex_a9/src/fpu.rs

@@ -6,6 +6,7 @@ pub fn enable_fpu() {
             mrc p15, 0, r1, c1, c0, 2
             orr r1, r1, (0b1111<<20)
             mcr p15, 0, r1, c1, c0, 2
+            isb
 
             vmrs r1, fpexc
             orr r1, r1, (1<<30)

libcortex_a9/src/lib.rs

@@ -1,10 +1,6 @@
 #![no_std]
 #![feature(never_type)]
-#![feature(global_asm)]
-#![feature(asm)]
-#![allow(incomplete_features)]
 #![feature(inline_const)]
-#![feature(const_fn_trait_bound)]
 
 extern crate alloc;
 

libcortex_a9/src/sync_channel.rs

@@ -177,10 +177,7 @@ macro_rules! sync_channel {
         {
             use core::sync::atomic::{AtomicUsize, AtomicPtr};
             use $crate::sync_channel::{Sender, Receiver};
-            const fn new_atomic() -> AtomicPtr<$t> {
+            static LIST: [AtomicPtr<$t>; $cap + 1] = [const { AtomicPtr::new(core::ptr::null_mut()) }; $cap + 1];
-                AtomicPtr::new(core::ptr::null_mut())
-            }
-            static LIST: [AtomicPtr<$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))

libsupport_zynq/Cargo.toml

@@ -20,7 +20,7 @@ default = ["panic_handler", "dummy_irq_handler", "dummy_fiq_handler"]
 
 [dependencies]
 r0 = "1"
-compiler_builtins = "=0.1.49"
+compiler_builtins = "=0.1.70"
 linked_list_allocator = { version = "0.8", default-features = false, features = ["const_mut_refs"] }
 libregister = { path = "../libregister" }
 libcortex_a9 = { path = "../libcortex_a9" }

libsupport_zynq/src/boot.rs

@@ -66,10 +66,12 @@ unsafe extern "C" fn boot_core0() -> ! {
 unsafe extern "C" fn boot_core1() -> ! {
     l1_cache_init();
 
+    enable_fpu();
     let mpcore = mpcore::RegisterBlock::mpcore();
     mpcore.scu_invalidate.invalidate_core1();
 
-    let mmu_table = mmu::L1Table::get();
+    let mmu_table = mmu::L1Table::get()
+        .setup_flat_layout();
     mmu::with_mmu(mmu_table, || {
         ACTLR.enable_smp();
         ACTLR.enable_prefetch();

libsupport_zynq/src/lib.rs

@@ -3,8 +3,6 @@
 #![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;