1 use core::arch::asm; 2 3 /// @brief 获取当前cpu的apic id 4 #[inline] 5 pub fn current_cpu_id() -> u8 { 6 let cpuid_res: u32; 7 unsafe { 8 asm!( 9 "mov eax, 1", 10 "cpuid", 11 "mov r15, rbx", 12 lateout("r15") cpuid_res 13 ); 14 } 15 return ((cpuid_res >> 24) & 0xff) as u8; 16 } 17 18 /// @brief 通过pause指令，让cpu休息一会儿。降低空转功耗 19 pub fn cpu_relax() { 20 unsafe { 21 asm!("pause"); 22 } 23 } 24