1 use crate::time::{clocksource::HZ, TimeArch}; 2 3 use super::driver::tsc::TSCManager; 4 5 /// 这个是系统jiffies时钟源的固有频率（不是调频之后的） 6 pub const CLOCK_TICK_RATE: u32 = HZ as u32 * 1000000; 7 8 pub struct X86_64TimeArch; 9 10 impl TimeArch for X86_64TimeArch { 11 #[inline(always)] 12 fn get_cycles() -> usize { 13 unsafe { x86::time::rdtsc() as usize } 14 } 15 16 fn cal_expire_cycles(ns: usize) -> usize { 17 Self::get_cycles() + ns * TSCManager::cpu_khz() as usize / 1000000 18 } 19 20 /// 将CPU的时钟周期数转换为纳秒 21 #[inline(always)] 22 fn cycles2ns(cycles: usize) -> usize { 23 cycles * 1000000 / TSCManager::cpu_khz() as usize 24 } 25 } 26