1 use core::arch::asm;
2 
3 use x86::cpuid::{cpuid, CpuIdResult};
4 
5 /// @brief 获取当前cpu的apic id
6 #[inline]
current_cpu_id() -> u327 pub fn current_cpu_id() -> u32 {
8     let cpuid_res: CpuIdResult = cpuid!(0x1);
9     let cpu_id = (cpuid_res.ebx >> 24) & 0xff;
10     return cpu_id;
11 }
12 
13 /// @brief 通过pause指令，让cpu休息一会儿。降低空转功耗
cpu_relax()14 pub fn cpu_relax() {
15     unsafe {
16         asm!("pause");
17     }
18 }
19 
20 /// 重置cpu
cpu_reset() -> !21 pub fn cpu_reset() -> ! {
22     // 重启计算机
23     unsafe { x86::io::outb(0x64, 0xfe) };
24     loop {}
25 }
26