zynq-rs/src/main.rs
2019-08-06 22:03:23 +02:00

134 lines
2.9 KiB
Rust

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