Kernel early-stage console.

Use it before formal console can be activated during a kernel's bootstrapping process. Once formal console can be used, disable early console.

Examples

#![no_std]
#![no_main]

use core::panic::PanicInfo;

#[no_mangle]
pub extern "Rust" fn runtime_main(_cpu_id: usize, _dtb_pa: usize) {
    let msg = "\n[rt_early_console]: ok!\n";
    early_console::write_bytes(msg.as_bytes());
    axhal::misc::terminate();
}

#[panic_handler]
pub fn panic(info: &PanicInfo) -> ! {
    arch_boot::panic(info)
}

Functions

write_bytes

fn write_bytes(bytes: &[u8]);

Write a slice of bytes to the console.

read_bytes

fn read_bytes(bytes: &mut [u8]) -> usize;

Read a slice of bytes from the console.