1b8ed3825SDonkey Kane use crate::time::{clocksource::HZ, TimeArch}; 2fbe6becdSLoGin 38cb2e9b3SLoGin use super::driver::tsc::TSCManager; 48cb2e9b3SLoGin 5b8ed3825SDonkey Kane /// 这个是系统jiffies时钟源的固有频率（不是调频之后的） 6b8ed3825SDonkey Kane pub const CLOCK_TICK_RATE: u32 = HZ as u32 * 1000000; 7b8ed3825SDonkey Kane time_init()8*23ef2b33SLoGinpub fn time_init() { 9*23ef2b33SLoGin // do nothing 10*23ef2b33SLoGin } 11*23ef2b33SLoGin 12fbe6becdSLoGin pub struct X86_64TimeArch; 13fbe6becdSLoGin 14fbe6becdSLoGin impl TimeArch for X86_64TimeArch { 15b8ed3825SDonkey Kane #[inline(always)] get_cycles() -> usize16fbe6becdSLoGin fn get_cycles() -> usize { 17fbe6becdSLoGin unsafe { x86::time::rdtsc() as usize } 18fbe6becdSLoGin } 198cb2e9b3SLoGin cal_expire_cycles(ns: usize) -> usize208cb2e9b3SLoGin fn cal_expire_cycles(ns: usize) -> usize { 218cb2e9b3SLoGin Self::get_cycles() + ns * TSCManager::cpu_khz() as usize / 1000000 228cb2e9b3SLoGin } 23b8ed3825SDonkey Kane 24b8ed3825SDonkey Kane /// 将CPU的时钟周期数转换为纳秒 25b8ed3825SDonkey Kane #[inline(always)] cycles2ns(cycles: usize) -> usize26b8ed3825SDonkey Kane fn cycles2ns(cycles: usize) -> usize { 27b8ed3825SDonkey Kane cycles * 1000000 / TSCManager::cpu_khz() as usize 28b8ed3825SDonkey Kane } 29fbe6becdSLoGin } 30