d32bb116f0
Change-Id: Ic88defd30c6d3791a51b78a14135aff55e89394d Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/46285 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Michael Niewöhner <foss@mniewoehner.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
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*
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* Copyright 2018 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ARCH_CPUID_H
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#define _ARCH_CPUID_H
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#define cpuid(fn, eax, ebx, ecx, edx) \
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asm("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "0"(fn))
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#define _declare_cpuid(reg) \
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static inline unsigned int cpuid_##reg(unsigned int fn) \
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{ \
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unsigned int eax, ebx, ecx, edx; \
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cpuid(fn, eax, ebx, ecx, edx); \
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return reg; \
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}
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_declare_cpuid(eax)
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_declare_cpuid(ebx)
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_declare_cpuid(ecx)
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_declare_cpuid(edx)
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#undef _declare_cpuid
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static inline unsigned int cpuid_max(void)
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{
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return cpuid_eax(0);
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}
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static inline unsigned int cpuid_family(void)
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{
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const unsigned int eax = cpuid_eax(1);
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return (eax & 0xff00000) >> (20 - 4) | (eax & 0xf00) >> 8;
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}
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static inline unsigned int cpuid_model(void)
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{
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const unsigned int eax = cpuid_eax(1);
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return (eax & 0xf0000) >> (16 - 4) | (eax & 0xf0) >> 4;
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}
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#endif
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