forked from M-Labs/zynq-rs
134 lines
2.9 KiB
Rust
134 lines
2.9 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(asm)]
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#![feature(global_asm)]
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#![feature(naked_functions)]
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#![feature(compiler_builtins_lib)]
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#![feature(never_type)]
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use core::mem::uninitialized;
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use r0::zero_bss;
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use compiler_builtins as _;
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mod regs;
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mod cortex_a9;
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mod slcr;
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mod uart;
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mod stdio;
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mod eth;
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use crate::regs::{RegisterR, RegisterW};
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use crate::cortex_a9::{asm, regs::*, mmu};
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extern "C" {
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static mut __bss_start: u32;
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static mut __bss_end: u32;
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static mut __stack_start: u32;
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}
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#[link_section = ".text.boot"]
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#[no_mangle]
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#[naked]
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pub unsafe extern "C" fn _boot_cores() -> ! {
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const CORE_MASK: u32 = 0x3;
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match MPIDR.read() & CORE_MASK {
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0 => {
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SP.write(&mut __stack_start as *mut _ as u32);
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boot_core0();
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}
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_ => loop {
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// if not core0, infinitely wait for events
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asm::wfe();
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},
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}
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}
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#[naked]
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#[inline(never)]
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unsafe fn boot_core0() -> ! {
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l1_cache_init();
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zero_bss(&mut __bss_start, &mut __bss_end);
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let mmu_table = mmu::L1Table::get()
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.setup_flat_layout();
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mmu::with_mmu(mmu_table, || {
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main();
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panic!("return from main");
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});
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}
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fn l1_cache_init() {
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// Invalidate TLBs
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tlbiall();
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// Invalidate I-Cache
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iciallu();
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// Invalidate Branch Predictor Array
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bpiall();
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// Invalidate D-Cache
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dccisw();
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}
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fn main() {
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println!("Main.");
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let mut eth = eth::Eth::default([0x0, 0x17, 0xde, 0xea, 0xbe, 0xef]);
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println!("Eth on");
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eth.reset_phy();
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let mut rx_descs: [eth::rx::DescEntry; 8] = unsafe { uninitialized() };
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let mut rx_buffers = [[0u8; 1536]; 8];
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let mut eth = eth.start_rx(&mut rx_descs, &mut rx_buffers);
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let mut tx_descs: [eth::tx::DescEntry; 8] = unsafe { uninitialized() };
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let mut tx_buffers = [[0u8; 1536]; 8];
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let mut eth = eth.start_tx(&mut tx_descs, &mut tx_buffers);
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loop {
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match eth.recv_next() {
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Ok(Some(pkt)) => {
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print!("eth: rx {} bytes", pkt.len());
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for b in pkt.iter() {
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print!(" {:02X}", b);
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}
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println!("");
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}
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Ok(None) => {}
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Err(e) => {
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println!("eth rx error: {:?}", e);
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}
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}
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match eth.send(512) {
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Some(mut pkt) => {
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let mut x = 0;
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for b in pkt.iter_mut() {
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*b = x;
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x += 1;
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}
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println!("eth tx {} bytes", pkt.len());
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}
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None => println!("eth tx shortage"),
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}
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}
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panic!("End");
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}
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#[panic_handler]
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fn panic(info: &core::panic::PanicInfo) -> ! {
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println!("\nPanic: {}", info);
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slcr::RegisterBlock::unlocked(|slcr| slcr.soft_reset());
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loop {}
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}
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#[no_mangle]
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pub unsafe extern "C" fn PrefetchAbort() {
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panic!("PrefetchAbort");
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}
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#[no_mangle]
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pub unsafe extern "C" fn DataAbort() {
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panic!("DataAbort");
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}
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