1 use crate::time::{clocksource::HZ, TimeArch}; 2 pub struct RiscV64TimeArch; 3 4 /// 这个是系统jiffies时钟源的固有频率（不是调频之后的） 5 pub const CLOCK_TICK_RATE: u32 = HZ as u32 * 1000000; 6 7 impl TimeArch for RiscV64TimeArch { 8 fn get_cycles() -> usize { 9 riscv::register::cycle::read() 10 } 11 12 fn cal_expire_cycles(ns: usize) -> usize { 13 todo!() 14 } 15 /// 将CPU的时钟周期数转换为纳秒 16 #[inline(always)] 17 fn cycles2ns(cycles: usize) -> usize { 18 todo!() 19 } 20 } 21