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zynq-rs
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Merge branch 'master' of git.m-labs.hk:M-Labs/zc706 into sdio-registers

This commit is contained in:
pca 2020-05-06 11:06:38 +08:00
parent 244ccdeac2 ce844f1b02
commit 4acee21c05
25 changed files with 180 additions and 216 deletions
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8
Cargo.lock generated
View File

@ -66,6 +66,7 @@ dependencies = [
"embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
"libcortex_a9 0.0.0",
"libregister 0.0.0",
"log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
"nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
"smoltcp 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
@ -97,14 +98,13 @@ dependencies = [
"libboard_zynq 0.0.0",
"libcortex_a9 0.0.0",
"libregister 0.0.0",
"linked_list_allocator 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
"log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
"linked_list_allocator 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
"r0 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "linked_list_allocator"
version = "0.8.2"
version = "0.8.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
@ -170,7 +170,7 @@ dependencies = [
"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
"checksum compiler_builtins 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)" = "38f18416546abfbf8d801c555a0e99524453e7214f9cc9107ad49de3d5948ccc"
"checksum embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ee4908a155094da7723c2d60d617b820061e3b4efcc3d9e293d206a5a76c170b"
"checksum linked_list_allocator 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c1070ea54beccbfd3a3987aca6440f94cc1e0b447c2d979d8c7f761e265417e4"
"checksum linked_list_allocator 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d6b60501dd4c850950bb43f970d544f6ce04e0ca021da2db2538fbe9d923f19e"
"checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
"checksum managed 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "fdcec5e97041c7f0f1c5b7d93f12e57293c831c646f4cc7a5db59460c7ea8de6"
"checksum nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b1411551beb3c11dedfb0a90a0fa256b47d28b9ec2cdff34c25a2fa59e45dbdc"

3
default.nix
View File

@ -49,9 +49,10 @@ let
name = "${crate}";
src = ./.;
crateSubdir = crate;
cargoSha256 = "0wqsxbcphcf240mqfglckl0lz82f19g1jlcf3xk73aflpyxk5pmm";
cargoSha256 = "0xlynsr94dyv0g41qwk5490w3wnzd5g70msaih6mcbgr3v4s2q34";
cargoFeatures = features;
doCheck = false;
dontFixup = true;
};
in {
inherit pkgs rustPlatform rustcSrc gcc;

2
build.rs → experiments/build.rs
View File

@ -12,7 +12,7 @@ fn main() {
.unwrap();
println!("cargo:rustc-link-search={}", out.display());
// Only re-run the build script when memory.x is changed,
// Only re-run the build script when link.x is changed,
// instead of when any part of the source code changes.
println!("cargo:rerun-if-changed=link.x");
}

68
experiments/link.x Normal file
View File

@ -0,0 +1,68 @@
ENTRY(_boot_cores);
/* 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
{
/* 256 kB On-Chip Memory */
OCM : ORIGIN = 0, LENGTH = 0x30000
OCM3 : ORIGIN = 0xFFFF0000, LENGTH = 0x10000
}
SECTIONS
{
.text :
{
KEEP(*(.text.exceptions));
*(.text.boot);
*(.text .text.*);
} > OCM
.rodata : ALIGN(4)
{
*(.rodata .rodata.*);
} > OCM
.data : ALIGN(4)
{
*(.data .data.*);
} > OCM
.bss (NOLOAD) : ALIGN(4)
{
__bss_start = .;
*(.bss .bss.*);
. = ALIGN(4);
__bss_end = .;
} > OCM
.stack1 (NOLOAD) : ALIGN(8) {
__stack1_end = .;
. += 0x200;
__stack1_start = .;
} > OCM
.stack0 (NOLOAD) : ALIGN(8) {
__stack0_end = .;
. = ORIGIN(OCM) + LENGTH(OCM) - 8;
__stack0_start = .;
} > OCM
/DISCARD/ :
{
/* Unused exception related info that only wastes space */
*(.ARM.exidx);
*(.ARM.exidx.*);
*(.ARM.extab.*);
}
}
ASSERT(SIZEOF(.stack0) >= 0x1000, "less than 4 KB left for stack");

83
experiments/src/main.rs
View File

@ -6,7 +6,6 @@ extern crate alloc;
use core::{mem::transmute, task::Poll};
use alloc::{borrow::ToOwned, collections::BTreeMap, format};
use log::info;
use embedded_hal::timer::CountDown;
use libregister::RegisterR;
use libcortex_a9::{mutex::Mutex, sync_channel::{self, sync_channel}};
use libboard_zynq::{
@ -17,8 +16,6 @@ use libboard_zynq::{
wire::{EthernetAddress, IpAddress, IpCidr},
iface::{NeighborCache, EthernetInterfaceBuilder, Routes},
time::Instant,
socket::SocketSet,
socket::{TcpSocket, TcpSocketBuffer},
},
time::Milliseconds,
};
@ -32,14 +29,12 @@ mod ps7_init;
const HWADDR: [u8; 6] = [0, 0x23, 0xde, 0xea, 0xbe, 0xef];
static mut STACK_CORE1: [u32; 512] = [0; 512];
#[no_mangle]
pub fn main_core0() {
// zynq::clocks::CpuClocks::enable_io(1_250_000_000);
println!("\nzc706 main");
libsupport_zynq::logger::init().unwrap();
libboard_zynq::logger::init().unwrap();
log::set_max_level(log::LevelFilter::Trace);
info!("Boot mode: {:?}", zynq::slcr::RegisterBlock::new().boot_mode.read().boot_mode_pins());
@ -49,7 +44,7 @@ pub fn main_core0() {
#[cfg(feature = "target_cora_z7_10")]
const CPU_FREQ: u32 = 650_000_000;
println!("Setup clock sources...");
info!("Setup clock sources...");
ArmPll::setup(2 * CPU_FREQ);
Clocks::set_cpu_freq(CPU_FREQ);
#[cfg(feature = "target_zc706")]
@ -57,9 +52,9 @@ pub fn main_core0() {
IoPll::setup(1_000_000_000);
libboard_zynq::stdio::drop_uart();
}
println!("PLLs set up");
info!("PLLs set up");
let clocks = zynq::clocks::Clocks::get();
println!("CPU Clocks: {}/{}/{}/{}", clocks.cpu_6x4x(), clocks.cpu_3x2x(), clocks.cpu_2x(), clocks.cpu_1x());
info!("CPU Clocks: {}/{}/{}/{}", clocks.cpu_6x4x(), clocks.cpu_3x2x(), clocks.cpu_2x(), clocks.cpu_1x());
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()) };
@ -79,6 +74,7 @@ pub fn main_core0() {
ddr.memtest();
ram::init_alloc_ddr(&mut ddr);
#[cfg(dev)]
for i in 0..=1 {
let mut flash_io = flash.manual_mode(i);
// println!("rdcr={:02X}", flash_io.rdcr());
@ -111,41 +107,13 @@ pub fn main_core0() {
flash_io.erase(0);
});
flash_io.write_enabled(|flash_io| {
flash_io.program(0, [0x23054223; (0x100 >> 2)].iter().cloned());
flash_io.program(0, [0x23054223; 0x100 >> 2].iter().cloned());
});
flash = flash_io.stop();
}
let (mut tx, mut rx) = sync_channel::sync_channel(0);
task::spawn(async move {
println!("outer task");
while let Some(item) = *rx.async_recv().await {
println!("received {}", item);
}
});
task::spawn(async {
for i in 1..=3 {
println!("outer task2: {}", i);
task::r#yield().await;
}
});
task::block_on(async {
task::spawn(async {
println!("inner task");
});
for i in 1..=10 {
println!("yield {}", i);
task::r#yield().await;
tx.async_send(Some(i)).await;
}
tx.async_send(None).await;
});
let core1_stack = unsafe { &mut STACK_CORE1[..] };
println!("{} bytes stack for core1", core1_stack.len());
let core1 = boot::Core1::start(core1_stack);
let core1 = boot::Core1::start();
let (mut core1_req, rx) = sync_channel(10);
*CORE1_REQ.lock() = Some(rx);
@ -160,13 +128,6 @@ pub fn main_core0() {
});
core1.disable();
libcortex_a9::asm::dsb();
print!("Core1 stack [{:08X}..{:08X}]:", &core1.stack[0] as *const _ as u32, &core1.stack[core1.stack.len() - 1] as *const _ as u32);
for w in core1.stack {
print!(" {:08X}", w);
}
println!(".");
let eth = zynq::eth::Eth::default(HWADDR.clone());
println!("Eth on");
@ -189,23 +150,13 @@ pub fn main_core0() {
unsafe { transmute(tx_descs.as_mut_slice()) },
unsafe { transmute(tx_buffers.as_mut_slice()) },
);
// loop {
// match eth.recv_next() {
// Ok(None) => {},
// Ok(Some(pkt)) => println!("received {} bytes", pkt.len()),
// Err(e) => println!("e: {:?}", e),
// }
// }
println!("iface...");
let ethernet_addr = EthernetAddress(HWADDR);
// IP stack
let local_addr = IpAddress::v4(192, 168, 1, 51);
let mut ip_addrs = [IpCidr::new(local_addr, 24)];
let mut routes_storage = vec![None; 4];
let routes = Routes::new(/*BTreeMap::new()*/ &mut routes_storage[..]);
let mut neighbor_storage = vec![None; 256];
let neighbor_cache = NeighborCache::new(&mut neighbor_storage[..]);
let routes = Routes::new(BTreeMap::new());
let neighbor_cache = NeighborCache::new(BTreeMap::new());
let mut iface = EthernetInterfaceBuilder::new(&mut eth)
.ethernet_addr(ethernet_addr)
.ip_addrs(&mut ip_addrs[..])
@ -213,8 +164,8 @@ pub fn main_core0() {
.neighbor_cache(neighbor_cache)
.finalize();
// TODO: compare with ps7_init
ps7_init::report_differences();
Sockets::init(32);
/// `chargen`
const TCP_PORT: u16 = 19;
@ -244,20 +195,20 @@ pub fn main_core0() {
None =>
stream.send("I had trouble reading your name.\n".bytes()).await?,
}
stream.flush().await;
let _ = stream.flush().await;
Ok(())
}
let mut counter = alloc::rc::Rc::new(core::cell::RefCell::new(0));
let counter = alloc::rc::Rc::new(core::cell::RefCell::new(0));
task::spawn(async move {
while let stream = TcpStream::accept(TCP_PORT, 2048, 2408).await.unwrap() {
while let Ok(stream) = TcpStream::accept(TCP_PORT, 2048, 2408).await {
let counter = counter.clone();
task::spawn(async move {
*counter.borrow_mut() += 1;
println!("Serving {} connections", *counter.borrow());
handle_connection(stream)
.await
.map_err(|e| println!("Connection: {:?}", e));
.unwrap_or_else(|e| println!("Connection: {:?}", e));
*counter.borrow_mut() -= 1;
println!("Now serving {} connections", *counter.borrow());
});
@ -272,7 +223,7 @@ pub fn main_core0() {
let timestamp = timer.get_us();
let seconds = timestamp / 1_000_000;
let micros = timestamp % 1_000_000;
println!("time: {:6}.{:06}s", seconds, micros);
info!("time: {:6}.{:06}s", seconds, micros);
}
});
@ -293,7 +244,7 @@ pub fn main_core1() {
while req.is_none() {
req = CORE1_REQ.lock().take();
}
let mut req = req.unwrap();
let req = req.unwrap();
let mut res = None;
while res.is_none() {
res = CORE1_RES.lock().take();

1
libboard_zynq/Cargo.toml
View File

@ -15,6 +15,7 @@ bit_field = "0.10"
embedded-hal = "0.2"
nb = "0.1"
void = { version = "1", default-features = false }
log = "0.4"
libregister = { path = "../libregister" }
libcortex_a9 = { path = "../libcortex_a9" }

16
libboard_zynq/src/clocks/source.rs
View File

@ -1,3 +1,4 @@
use log::debug;
use libregister::{RegisterR, RegisterW, RegisterRW};
use super::slcr;
@ -48,6 +49,8 @@ pub trait ClockSource {
u32::from(pll_ctrl.read().pll_fdiv()) * PS_CLK
}
fn name() -> &'static str;
/// Zynq-7000 AP SoC Technical Reference Manual:
/// 25.10.4 PLLs
fn setup(target_freq: u32) {
@ -58,6 +61,7 @@ pub trait ClockSource {
.expect("PLL_FDIV_LOCK_PARAM")
.1.clone();
debug!("Set {} to {} Hz", Self::name(), target_freq);
slcr::RegisterBlock::unlocked(|slcr| {
let (pll_ctrl, pll_cfg, pll_status) = Self::pll_regs(slcr);
@ -108,6 +112,10 @@ impl ClockSource for ArmPll {
fn pll_locked(pll_status: &mut crate::slcr::PllStatus) -> bool {
pll_status.read().arm_pll_lock()
}
fn name() -> &'static str {
&"ARM_PLL"
}
}
/// DDR PLL: Recommended clock for the DDR DRAM controller and AXI_HP interfaces
@ -130,6 +138,10 @@ impl ClockSource for DdrPll {
fn pll_locked(pll_status: &mut crate::slcr::PllStatus) -> bool {
pll_status.read().ddr_pll_lock()
}
fn name() -> &'static str {
&"DDR_PLL"
}
}
/// I/O PLL: Recommended clock for I/O peripherals
@ -153,4 +165,8 @@ impl ClockSource for IoPll {
fn pll_locked(pll_status: &mut crate::slcr::PllStatus) -> bool {
pll_status.read().io_pll_lock()
}
fn name() -> &'static str {
&"IO_PLL"
}
}

11
libboard_zynq/src/ddr/mod.rs
View File

@ -1,4 +1,5 @@
use libregister::{RegisterR, RegisterW, RegisterRW};
use log::{debug, info, error};
use crate::{print, println};
use super::slcr::{self, DdriobVrefSel};
use super::clocks::{Clocks, source::{DdrPll, ClockSource}};
@ -38,11 +39,9 @@ impl DdrRam {
DdrPll::setup(2 * DDR_FREQ);
let clocks = Clocks::get();
println!("Clocks: {:?}", clocks);
let ddr3x_clk_divisor = 2;
let ddr2x_clk_divisor = 3;
println!("DDR 3x/2x clocks: {}/{}", clocks.ddr / u32::from(ddr3x_clk_divisor), clocks.ddr / u32::from(ddr2x_clk_divisor));
debug!("DDR 3x/2x clocks: {}/{}", clocks.ddr / u32::from(ddr3x_clk_divisor), clocks.ddr / u32::from(ddr2x_clk_divisor));
slcr::RegisterBlock::unlocked(|slcr| {
slcr.ddr_clk_ctrl.write(
@ -63,7 +62,7 @@ impl DdrRam {
.max(1).min(63) as u8;
let divisor1 = ((DCI_FREQ - 1 + clocks.ddr) / DCI_FREQ / u32::from(divisor0))
.max(1).min(63) as u8;
println!("DDR DCI clock: {} Hz", clocks.ddr / u32::from(divisor0) / u32::from(divisor1));
debug!("DDR DCI clock: {} Hz", clocks.ddr / u32::from(divisor0) / u32::from(divisor1));
slcr::RegisterBlock::unlocked(|slcr| {
// Step 1.
@ -226,7 +225,7 @@ impl DdrRam {
let patterns: &'static [u32] = &[0xffff_ffff, 0x5555_5555, 0xaaaa_aaaa, 0];
let mut expected = None;
for (i, pattern) in patterns.iter().enumerate() {
println!("memtest phase {} (status: {:?})", i, self.status());
info!("memtest phase {} (status: {:?})", i, self.status());
for megabyte in 0..=(slice.len() / (1024 * 1024)) {
let start = megabyte * 1024 * 1024 / 4;
@ -235,7 +234,7 @@ impl DdrRam {
expected.map(|expected| {
let read: u32 = *b;
if read != expected {
println!("{:08X}: expected {:08X}, read {:08X}", b as *mut _ as usize, expected, read);
error!("{:08X}: expected {:08X}, read {:08X}", b as *mut _ as usize, expected, read);
}
});
*b = *pattern;

8
libboard_zynq/src/devc/mod.rs
View File

@ -26,12 +26,18 @@ impl DevC {
})
}
pub fn is_done(&self) -> bool {
// Note: contrary to what the TRM says, this appears to be simply
// the state of the DONE signal.
self.regs.int_sts.read().ixr_pcfg_done()
}
pub fn program(&mut self) {
slcr::RegisterBlock::unlocked(|slcr| {
slcr.init_preload_fpga();
});
while !self.regs.int_sts.read().ixr_pcfg_done() {}
while !self.is_done() {}
slcr::RegisterBlock::unlocked(|slcr| {
slcr.init_postload_fpga();

8
libboard_zynq/src/eth/mod.rs
View File

@ -1,6 +1,6 @@
use core::ops::{Deref, DerefMut};
use log::{error, info, warn};
use libregister::*;
use crate::println;
use super::slcr;
use super::clocks::Clocks;
@ -389,7 +389,7 @@ impl<'r, 'rx, 'tx: 'a, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescLis
None
}
Err(e) => {
println!("eth recv error: {:?}", e);
error!("eth recv error: {:?}", e);
None
}
}
@ -555,7 +555,7 @@ impl<'r> EthInner<'r> {
if self.link != link {
match &link {
Some(link) => {
println!("eth: got {:?}", link);
info!("eth: got {:?}", link);
use phy::LinkSpeed::*;
let txclock = match link.speed {
@ -573,7 +573,7 @@ impl<'r> EthInner<'r> {
);
}
None => {
println!("eth: link lost");
warn!("eth: link lost");
phy.modify_control(self, |control|
control.set_autoneg_enable(true)
.set_restart_autoneg(true)

19
libboard_zynq/src/flash/mod.rs
View File

@ -1,8 +1,9 @@
//! Quad-SPI Flash Controller
use crate::{print, println};
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};
@ -422,17 +423,17 @@ impl Flash<Manual> {
let sr1 = self.wait_while_sr1_zeroed();
if sr1.e_err() {
println!("E_ERR");
error!("E_ERR");
} else if sr1.p_err() {
println!("P_ERR");
error!("P_ERR");
} else if sr1.wip() {
print!("Erase in progress");
info!("Erase in progress");
while self.read_reg::<SR1>().wip() {
print!(".");
}
println!("");
} else {
println!("erased? sr1={:02X}", sr1.inner);
warn!("erased? sr1={:02X}", sr1.inner);
}
}
@ -448,17 +449,17 @@ impl Flash<Manual> {
let sr1 = self.read_reg::<SR1>();
if sr1.e_err() {
println!("E_ERR");
error!("E_ERR");
} else if sr1.p_err() {
println!("P_ERR");
error!("P_ERR");
} else if sr1.wip() {
println!("Program in progress");
info!("Program in progress");
while self.read_reg::<SR1>().wip() {
print!(".");
}
println!("");
} else {
println!("programmed? sr1={:02X}", sr1.inner);
warn!("programmed? sr1={:02X}", sr1.inner);
}
}

3
libboard_zynq/src/lib.rs
View File

@ -17,4 +17,5 @@ pub mod flash;
pub mod dmac;
pub mod time;
pub mod timer;
pub mod sdio;
pub mod sdio;
pub mod logger;

4
libsupport_zynq/src/logger.rs → libboard_zynq/src/logger.rs
View File

@ -1,6 +1,6 @@
//! A logger for the `log` crate
use libboard_zynq::{println, stdio, timer::GlobalTimer};
use crate::{println, stdio, timer::GlobalTimer};
pub static LOGGER: Logger = Logger;
@ -29,6 +29,6 @@ impl log::Log for Logger {
}
fn flush(&self) {
let uart = stdio::get_uart();
while !uart.tx_fifo_empty() {}
while !uart.tx_idle() {}
}
}

3
libboard_zynq/src/stdio.rs
View File

@ -63,6 +63,7 @@ macro_rules! println {
let mut uart = $crate::stdio::get_uart();
let _ = write!(uart, $($arg)*);
let _ = write!(uart, "\n");
while !uart.tx_fifo_empty() {}
// flush after the newline
while !uart.tx_idle() {}
})
}

2
libboard_zynq/src/timer/global.rs
View File

@ -15,7 +15,7 @@ pub struct GlobalTimer {
impl GlobalTimer {
/// Get the potentially uninitialized timer
pub unsafe fn get() -> GlobalTimer {
let mut regs = mpcore::RegisterBlock::new();
let regs = mpcore::RegisterBlock::new();
GlobalTimer { regs }
}

9
libboard_zynq/src/uart/mod.rs
View File

@ -192,15 +192,14 @@ impl Uart {
self.regs.channel_sts.read().txfull()
}
pub fn tx_fifo_empty(&self) -> bool {
self.regs.channel_sts.read().txempty()
pub fn tx_idle(&self) -> bool {
let status = self.regs.channel_sts.read();
status.txempty() && !status.tactive()
}
}
impl fmt::Write for Uart {
fn write_str(&mut self, s: &str) -> Result<(), fmt::Error> {
while !self.tx_fifo_empty() {}
for b in s.bytes() {
self.write_byte(b);
}
@ -222,7 +221,7 @@ impl embedded_hal::serial::Write<u8> for Uart {
}
fn flush(&mut self) -> nb::Result<(), Void> {
if self.tx_fifo_empty() {
if self.tx_idle() {
Ok(())
} else {
Err(nb::Error::WouldBlock)

12
libcortex_a9/src/asm.rs
View File

@ -1,35 +1,35 @@
/// The classic no-op
#[inline]
pub fn nop() {
unsafe { asm!("nop" :::: "volatile") }
unsafe { llvm_asm!("nop" :::: "volatile") }
}
/// Wait For Event
#[inline]
pub fn wfe() {
unsafe { asm!("wfe" :::: "volatile") }
unsafe { llvm_asm!("wfe" :::: "volatile") }
}
/// Send Event
#[inline]
pub fn sev() {
unsafe { asm!("sev" :::: "volatile") }
unsafe { llvm_asm!("sev" :::: "volatile") }
}
/// Data Memory Barrier
#[inline]
pub fn dmb() {
unsafe { asm!("dmb" :::: "volatile") }
unsafe { llvm_asm!("dmb" :::: "volatile") }
}
/// Data Synchronization Barrier
#[inline]
pub fn dsb() {
unsafe { asm!("dsb" :::: "volatile") }
unsafe { llvm_asm!("dsb" :::: "volatile") }
}
/// Instruction Synchronization Barrier
#[inline]
pub fn isb() {
unsafe { asm!("isb" :::: "volatile") }
unsafe { llvm_asm!("isb" :::: "volatile") }
}

18
libcortex_a9/src/cache.rs
View File

@ -2,7 +2,7 @@
#[inline(always)]
pub fn tlbiall() {
unsafe {
asm!("mcr p15, 0, $0, c8, c7, 0" :: "r" (0) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c8, c7, 0" :: "r" (0) :: "volatile");
}
}
@ -10,7 +10,7 @@ pub fn tlbiall() {
#[inline(always)]
pub fn iciallu() {
unsafe {
asm!("mcr p15, 0, $0, c7, c5, 0" :: "r" (0) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c5, 0" :: "r" (0) :: "volatile");
}
}
@ -18,7 +18,7 @@ pub fn iciallu() {
#[inline(always)]
pub fn bpiall() {
unsafe {
asm!("mcr p15, 0, $0, c7, c5, 6" :: "r" (0) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c5, 6" :: "r" (0) :: "volatile");
}
}
@ -26,7 +26,7 @@ pub fn bpiall() {
#[inline(always)]
pub fn dccsw(setway: u32) {
unsafe {
asm!("mcr p15, 0, $0, c7, c10, 2" :: "r" (setway) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c10, 2" :: "r" (setway) :: "volatile");
}
}
@ -38,7 +38,7 @@ 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.
asm!("mcr p15, 0, $0, c7, c6, 2" :: "r" (setway) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c6, 2" :: "r" (setway) :: "volatile");
}
}
@ -58,7 +58,7 @@ pub fn dciall() {
// select L1 data cache
unsafe {
asm!("mcr p15, 2, $0, c0, c0, 0" :: "r" (0) :: "volatile");
llvm_asm!("mcr p15, 2, $0, c0, c0, 0" :: "r" (0) :: "volatile");
}
// Invalidate entire D-Cache by iterating every set and every way
@ -101,7 +101,7 @@ fn slice_cache_line_addrs<T>(slice: &[T]) -> impl Iterator<Item = usize> {
#[inline(always)]
pub fn dccimvac(addr: usize) {
unsafe {
asm!("mcr p15, 0, $0, c7, c14, 1" :: "r" (addr) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c14, 1" :: "r" (addr) :: "volatile");
}
}
@ -122,7 +122,7 @@ pub fn dcci_slice<T>(slice: &mut [T]) {
#[inline(always)]
pub fn dccmvac(addr: usize) {
unsafe {
asm!("mcr p15, 0, $0, c7, c10, 1" :: "r" (addr) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c10, 1" :: "r" (addr) :: "volatile");
}
}
@ -148,7 +148,7 @@ pub fn dcc_slice<T>(slice: &[T]) {
/// affecting more data than intended.
#[inline(always)]
pub unsafe fn dcimvac(addr: usize) {
asm!("mcr p15, 0, $0, c7, c6, 1" :: "r" (addr) :: "volatile");
llvm_asm!("mcr p15, 0, $0, c7, c6, 1" :: "r" (addr) :: "volatile");
}
/// Data cache clean and invalidate for an object.

2
libcortex_a9/src/lib.rs
View File

@ -1,5 +1,5 @@
#![no_std]
#![feature(asm, global_asm)]
#![feature(llvm_asm, global_asm)]
#![feature(never_type)]
extern crate alloc;

11
libcortex_a9/src/mmu.rs
View File

@ -94,16 +94,11 @@ impl L1Entry {
}
const L1_TABLE_SIZE: usize = 4096;
#[doc(hidden)]
#[link_section = ".bss.l1_table"]
#[no_mangle]
pub static mut l1_table: L1Table = L1Table {
static mut L1_TABLE: L1Table = L1Table {
table: [L1Entry(0); L1_TABLE_SIZE]
};
/// The `#[repr(align(16384))]` is unfortunately ineffective. Hence we
/// require explicit linking to a region defined in the linker script.
#[repr(align(16384))]
#[repr(C, align(16384))]
pub struct L1Table {
table: [L1Entry; L1_TABLE_SIZE]
}
@ -111,7 +106,7 @@ pub struct L1Table {
impl L1Table {
pub fn get() -> &'static mut Self {
unsafe {
&mut l1_table
&mut L1_TABLE
}
}

4
libcortex_a9/src/regs.rs
View File

@ -11,7 +11,7 @@ macro_rules! def_reg_r {
#[inline]
fn read(&self) -> Self::R {
let mut value: u32;
unsafe { asm!($asm_instr : "=r" (value) ::: "volatile") }
unsafe { llvm_asm!($asm_instr : "=r" (value) ::: "volatile") }
value.into()
}
}
@ -26,7 +26,7 @@ macro_rules! def_reg_w {
#[inline]
fn write(&mut self, value: Self::W) {
let value: u32 = value.into();
unsafe { asm!($asm_instr :: "r" (value) :: "volatile") }
unsafe { llvm_asm!($asm_instr :: "r" (value) :: "volatile") }
}
#[inline]

1
libsupport_zynq/Cargo.toml
View File

@ -12,7 +12,6 @@ target_cora_z7_10 = ["libboard_zynq/target_cora_z7_10"]
[dependencies]
r0 = "1"
compiler_builtins = "0.1"
log = "0.4"
linked_list_allocator = { version = "0.8", default-features = false }
libregister = { path = "../libregister" }
libcortex_a9 = { path = "../libcortex_a9" }

35
libsupport_zynq/src/boot.rs
View File

@ -9,13 +9,13 @@ use libboard_zynq::{slcr, mpcore};
extern "C" {
static mut __bss_start: u32;
static mut __bss_end: u32;
static mut __stack_start: u32;
static mut __stack0_start: u32;
static mut __stack1_start: u32;
fn main_core0();
fn main_core1();
}
/// `0` means: wait for initialization by core0
static mut CORE1_STACK: VolatileCell<u32> = VolatileCell::new(0);
static mut CORE1_ENABLED: VolatileCell<bool> = VolatileCell::new(false);
#[link_section = ".text.boot"]
#[no_mangle]
@ -25,15 +25,14 @@ pub unsafe extern "C" fn _boot_cores() -> ! {
match MPIDR.read() & CORE_MASK {
0 => {
SP.write(&mut __stack_start as *mut _ as u32);
SP.write(&mut __stack0_start as *mut _ as u32);
boot_core0();
}
1 => {
while CORE1_STACK.get() == 0 {
while !CORE1_ENABLED.get() {
asm::wfe();
}
SP.write(CORE1_STACK.get());
SP.write(&mut __stack1_start as *mut _ as u32);
boot_core1();
}
_ => unreachable!(),
@ -104,18 +103,12 @@ fn l1_cache_init() {
dciall();
}
pub struct Core1<S: AsMut<[u32]>> {
pub stack: S,
pub struct Core1 {
}
impl<S: AsMut<[u32]>> Core1<S> {
impl Core1 {
/// Reset and start core1
///
/// The stack must not be in OCM because core1 still has to
/// initialize its MMU before it can access DDR.
pub fn start(stack: S) -> Self {
let mut core = Core1 { stack };
pub fn start() -> Self {
// reset and stop (safe to repeat)
slcr::RegisterBlock::unlocked(|slcr| {
slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_rst1(true));
@ -123,15 +116,13 @@ impl<S: AsMut<[u32]>> Core1<S> {
slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_rst1(false));
});
let stack = core.stack.as_mut();
let stack_start = &mut stack[stack.len() - 1];
unsafe {
CORE1_STACK.set(stack_start as *mut _ as u32);
CORE1_ENABLED.set(true);
}
// Ensure stack pointer has been written to cache
asm::dmb();
// Flush cache-line
cache::dccmvac(unsafe { &CORE1_STACK } as *const _ as usize);
cache::dccmvac(unsafe { &CORE1_ENABLED } as *const _ as usize);
// wake up core1
slcr::RegisterBlock::unlocked(|slcr| {
@ -139,12 +130,12 @@ impl<S: AsMut<[u32]>> Core1<S> {
slcr.a9_cpu_rst_ctrl.modify(|_, w| w.a9_clkstop1(false));
});
core
Core1 {}
}
pub fn disable(&self) {
unsafe {
CORE1_STACK.set(0);
CORE1_ENABLED.set(false);
}
self.restart();
}

1
libsupport_zynq/src/lib.rs
View File

@ -10,5 +10,4 @@ pub extern crate compiler_builtins;
pub mod boot;
mod abort;
mod panic;
pub mod logger;
pub mod ram;

64
link.x
View File

@ -1,64 +0,0 @@
ENTRY(_boot_cores);
STACK_SIZE = 0x8000;
/* 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
{
/* 256 kB On-Chip Memory */
OCM : ORIGIN = 0, LENGTH = 0x30000
OCM3 : ORIGIN = 0xFFFF0000, LENGTH = 0x10000
}
SECTIONS
{
.text :
{
KEEP(*(.text.exceptions));
*(.text.boot);
*(.text .text.*);
} > OCM
.rodata : ALIGN(4)
{
*(.rodata .rodata.*);
} > OCM
.data : ALIGN(4)
{
*(.data .data.*);
} > OCM
.bss (NOLOAD) : ALIGN(0x4000)
{
/* Aligned to 16 kB */
KEEP(*(.bss.l1_table));
*(.bss .bss.*);
. = ALIGN(4);
} > OCM
__bss_start = ADDR(.bss);
__bss_end = ADDR(.bss) + SIZEOF(.bss);
.stack (NOLOAD) : ALIGN(0x1000) {
. += STACK_SIZE;
} > OCM
__stack_end = ADDR(.stack);
__stack_start = ADDR(.stack) + SIZEOF(.stack);
/DISCARD/ :
{
/* Unused exception related info that only wastes space */
*(.ARM.exidx);
*(.ARM.exidx.*);
*(.ARM.extab.*);
}
}