hifive_inventor/
io.rs

1// Licensed under the Apache License, Version 2.0 or the MIT License.
2// SPDX-License-Identifier: Apache-2.0 OR MIT
3// Copyright Tock Contributors 2022.
4
5use core::fmt::Write;
6use core::panic::PanicInfo;
7use core::str;
8use kernel::debug;
9use kernel::debug::IoWrite;
10use kernel::hil::led;
11
12use crate::CHIP;
13use crate::PROCESSES;
14use crate::PROCESS_PRINTER;
15
16struct Writer {}
17
18static mut WRITER: Writer = Writer {};
19
20impl Write for Writer {
21    fn write_str(&mut self, s: &str) -> ::core::fmt::Result {
22        self.write(s.as_bytes());
23        Ok(())
24    }
25}
26
27impl IoWrite for Writer {
28    fn write(&mut self, buf: &[u8]) -> usize {
29        let uart = sifive::uart::Uart::new(e310_g003::uart::UART0_BASE, 16_000_000);
30        uart.transmit_sync(buf);
31        buf.len()
32    }
33}
34
35/// Panic handler.
36#[cfg(not(test))]
37#[no_mangle]
38#[panic_handler]
39pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! {
40    use core::ptr::{addr_of, addr_of_mut};
41
42    let led = sifive::gpio::GpioPin::new(
43        e310_g003::gpio::GPIO0_BASE,
44        sifive::gpio::pins::pin22,
45        sifive::gpio::pins::pin22::SET,
46        sifive::gpio::pins::pin22::CLEAR,
47    );
48    let led = &mut led::LedLow::new(&led);
49    let writer = &mut *addr_of_mut!(WRITER);
50
51    debug::panic(
52        &mut [led],
53        writer,
54        pi,
55        &rv32i::support::nop,
56        &*addr_of!(PROCESSES),
57        &*addr_of!(CHIP),
58        &*addr_of!(PROCESS_PRINTER),
59    )
60}
hifive_inventor/io.rs

hifive_inventor/
io.rs
