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#ifndef _CPUFREQ_CPUID_H
#define _CPUFREQ_CPUID_H
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
/* ecx is often an input as well as an output. */
asm volatile(
#if defined(__i386__) && defined(__PIC__)
"push %%ebx\n"
"cpuid\n"
"movl %%ebx, %1\n"
"pop %%ebx\n"
#else
"cpuid\n"
#endif
: "=a" (*eax),
#if defined(__i386__) && defined(__PIC__)
"=r" (*ebx),
#else
"=b" (*ebx),
#endif
"=c" (*ecx),
"=d" (*edx)
: "0" (*eax), "2" (*ecx));
}
static inline void cpuid(unsigned int op,
unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
*eax = op;
*ecx = 0;
__cpuid(eax, ebx, ecx, edx);
}
/*
* CPUID functions returning a single datum
*/
static inline unsigned int cpuid_eax(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return eax;
}
static inline unsigned int cpuid_ebx(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return ebx;
}
static inline unsigned int cpuid_ecx(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return ecx;
}
static inline unsigned int cpuid_edx(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return edx;
}
#endif /* _CPUFREQ_CPUID_H */
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