79 lines
1.3 KiB
C
79 lines
1.3 KiB
C
#ifndef _CPU_H
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#define _CPU_H
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#include <inttypes.h>
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static inline uint64_t rdtsc(void)
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{
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uint64_t v;
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asm volatile("rdtsc" : "=A" (v));
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return v;
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}
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static inline uint32_t rdtscl(void)
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{
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uint32_t v;
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asm volatile("rdtsc" : "=a" (v) : : "edx");
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return v;
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}
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static inline uint32_t cpuid_eax(uint32_t level)
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{
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uint32_t v;
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asm("cpuid" : "=a" (v) : "a" (level) : "ebx", "ecx", "edx");
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return v;
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}
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static inline uint32_t cpuid_ebx(uint32_t level)
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{
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uint32_t v;
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asm("cpuid" : "=b" (v), "+a" (level) : : "ecx", "edx");
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return v;
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}
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static inline uint32_t cpuid_ecx(uint32_t level)
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{
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uint32_t v;
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asm("cpuid" : "=c" (v), "+a" (level) : : "ebx", "edx");
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return v;
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}
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static inline uint32_t cpuid_edx(uint32_t level)
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{
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uint32_t v;
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asm("cpuid" : "=d" (v), "+a" (level) : : "ebx", "ecx");
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return v;
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}
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static inline uint64_t rdmsr(uint32_t msr)
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{
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uint64_t v;
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asm volatile("rdmsr" : "=A" (v) : "c" (msr));
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return v;
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}
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static inline void wrmsr(uint64_t v, uint32_t msr)
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{
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asm volatile("wrmsr" : : "A" (v), "c" (msr));
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}
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static inline void cpu_relax(void)
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{
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asm volatile("rep ; nop");
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}
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/* These are local cli/sti; not SMP-safe!!! */
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static inline void cli(void)
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{
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asm volatile("cli");
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}
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static inline void sti(void)
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{
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asm volatile("sti");
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}
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#endif
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