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| /*
| * Copyright (c) 2012-2013 The Chromium OS Authors. All rights reserved.
| *
| * Licensed under the BSD 3-clause.
| */
|
| #ifndef __LTP_CPUID_H__
| #define __LTP_CPUID_H__
|
| static inline void cpuid(unsigned int info, unsigned int *eax, unsigned int *ebx,
| unsigned int *ecx, unsigned int *edx)
| {
| #if defined(__i386__) || defined(__x86_64__)
| unsigned int _eax = info, _ebx, _ecx, _edx;
| asm volatile(
| # ifdef __i386__
| "xchg %%ebx, %%esi;" /* save ebx (for PIC) */
| "cpuid;"
| "xchg %%esi, %%ebx;" /* restore ebx & pass to caller */
| : "=S" (_ebx),
| # else
| "cpuid;"
| : "=b" (_ebx),
| # endif
| "+a" (_eax), "=c" (_ecx), "=d" (_edx)
| : /* inputs: eax is handled above */
| );
| if (eax) *eax = _eax;
| if (ebx) *ebx = _ebx;
| if (ecx) *ecx = _ecx;
| if (edx) *edx = _edx;
| #endif
| }
|
| #endif
|
|
