mirror of
https://github.com/asterinas/asterinas.git
synced 2025-06-25 02:13:24 +00:00
25 lines
586 B
Rust
25 lines
586 B
Rust
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
use core::sync::atomic::{AtomicU8, Ordering::Relaxed};
|
|
|
|
use ostd::arch::x86::device::cmos::{get_century_register, CMOS_ADDRESS, CMOS_DATA};
|
|
|
|
pub(crate) static CENTURY_REGISTER: AtomicU8 = AtomicU8::new(0);
|
|
|
|
pub fn init() {
|
|
let Some(century_register) = get_century_register() else {
|
|
return;
|
|
};
|
|
CENTURY_REGISTER.store(century_register, Relaxed);
|
|
}
|
|
|
|
pub fn get_cmos(reg: u8) -> u8 {
|
|
CMOS_ADDRESS.write(reg);
|
|
CMOS_DATA.read()
|
|
}
|
|
|
|
pub fn is_updating() -> bool {
|
|
CMOS_ADDRESS.write(0x0A);
|
|
CMOS_DATA.read() & 0x80 != 0
|
|
}
|