artiq-zynq/runtime/src/main.rs

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Rust
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#![no_std]
#![no_main]
extern crate alloc;
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use core::{cmp, str};
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use core::mem::transmute;
use libboard_zynq::{
println,
self as zynq, clocks::Clocks, clocks::source::{ClockSource, ArmPll, IoPll},
smoltcp::{
wire::{EthernetAddress, IpAddress, IpCidr},
iface::{NeighborCache, EthernetInterfaceBuilder, Routes},
time::Instant,
},
};
use libsupport_zynq::{
ram, alloc::{vec, vec::Vec},
};
use libasync::smoltcp::Sockets;
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mod pl;
fn identifier_read(buf: &mut [u8]) -> &str {
unsafe {
pl::csr::identifier::address_write(0);
let len = pl::csr::identifier::data_read();
let len = cmp::min(len, buf.len() as u8);
for i in 0..len {
pl::csr::identifier::address_write(1 + i);
buf[i as usize] = pl::csr::identifier::data_read();
}
str::from_utf8_unchecked(&buf[..len as usize])
}
}
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const HWADDR: [u8; 6] = [0, 0x23, 0xab, 0xad, 0x1d, 0xea];
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#[no_mangle]
pub fn main_core0() {
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println!("ARTIQ runtime starting...");
const CPU_FREQ: u32 = 800_000_000;
ArmPll::setup(2 * CPU_FREQ);
Clocks::set_cpu_freq(CPU_FREQ);
IoPll::setup(1_000_000_000);
libboard_zynq::stdio::drop_uart(); // why?
let mut ddr = zynq::ddr::DdrRam::new();
ram::init_alloc(&mut ddr);
println!("Detected gateware: {}", identifier_read(&mut [0; 64]));
let eth = zynq::eth::Eth::default(HWADDR.clone());
const RX_LEN: usize = 8;
let mut rx_descs = (0..RX_LEN)
.map(|_| zynq::eth::rx::DescEntry::zeroed())
.collect::<Vec<_>>();
let mut rx_buffers = vec![zynq::eth::Buffer::new(); RX_LEN];
// Number of transmission buffers (minimum is two because with
// one, duplicate packet transmission occurs)
const TX_LEN: usize = 8;
let mut tx_descs = (0..TX_LEN)
.map(|_| zynq::eth::tx::DescEntry::zeroed())
.collect::<Vec<_>>();
let mut tx_buffers = vec![zynq::eth::Buffer::new(); TX_LEN];
let eth = eth.start_rx(&mut rx_descs, &mut rx_buffers);
let mut eth = eth.start_tx(
// HACK
unsafe { transmute(tx_descs.as_mut_slice()) },
unsafe { transmute(tx_buffers.as_mut_slice()) },
);
let ethernet_addr = EthernetAddress(HWADDR);
let local_addr = IpAddress::v4(192, 168, 1, 52);
let mut ip_addrs = [IpCidr::new(local_addr, 24)];
let mut routes_storage = vec![None; 4];
let routes = Routes::new(&mut routes_storage[..]);
let mut neighbor_storage = vec![None; 256];
let neighbor_cache = NeighborCache::new(&mut neighbor_storage[..]);
let mut iface = EthernetInterfaceBuilder::new(&mut eth)
.ethernet_addr(ethernet_addr)
.ip_addrs(&mut ip_addrs[..])
.routes(routes)
.neighbor_cache(neighbor_cache)
.finalize();
Sockets::init(32);
let mut time = 0u32;
Sockets::run(&mut iface, || {
time += 1;
Instant::from_millis(time)
});
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}
#[no_mangle]
pub fn main_core1() {
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println!("[CORE1] hello world {}", identifier_read(&mut [0; 64]));
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loop {}
}