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/*
*
* Copyright 2018 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ARCH_CPUID_H
#define _ARCH_CPUID_H
#define cpuid(fn, eax, ebx, ecx, edx) \
asm("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "0"(fn))
#define _declare_cpuid(reg) \
static inline unsigned int cpuid_##reg(unsigned int fn) \
{ \
unsigned int eax, ebx, ecx, edx; \
cpuid(fn, eax, ebx, ecx, edx); \
return reg; \
}
_declare_cpuid(eax)
_declare_cpuid(ebx)
_declare_cpuid(ecx)
_declare_cpuid(edx)
#undef _declare_cpuid
static inline unsigned int cpuid_max(void)
{
return cpuid_eax(0);
}
static inline unsigned int cpuid_family(void)
{
const unsigned int eax = cpuid_eax(1);
return (eax & 0xff00000) >> (20 - 4) | (eax & 0xf00) >> 8;
}
static inline unsigned int cpuid_model(void)
{
const unsigned int eax = cpuid_eax(1);
return (eax & 0xf0000) >> (16 - 4) | (eax & 0xf0) >> 4;
}
#endif
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