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