34 lines
916 B
C
34 lines
916 B
C
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#ifndef CPU_P6_MSR_H
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#define CPU_P6_MSR_H
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/*
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* Access to machine-specific registers (available on 586 and better only)
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* Note: the rd* operations modify the parameters directly (without using
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* pointer indirection), this allows gcc to optimize better
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*/
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#define rdmsr(msr,val1,val2) \
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__asm__ __volatile__("rdmsr" \
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: "=a" (val1), "=d" (val2) \
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: "c" (msr))
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#define wrmsr(msr,val1,val2) \
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__asm__ __volatile__("wrmsr" \
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: /* no outputs */ \
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: "c" (msr), "a" (val1), "d" (val2))
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#define rdtsc(low,high) \
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__asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
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#define rdtscl(low) \
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__asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
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#define rdtscll(val) \
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__asm__ __volatile__ ("rdtsc" : "=A" (val))
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#define rdpmc(counter,low,high) \
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__asm__ __volatile__("rdpmc" \
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: "=a" (low), "=d" (high) \
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: "c" (counter))
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#endif /* CPU_P6_MSR_H */
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