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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
-