43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
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/*
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* This file is part of msrtool.
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*
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* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "msrtool.h"
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static struct cpuid_t id;
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struct cpuid_t *cpuid(void) {
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uint32_t outeax;
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asm ("cpuid" : "=a" (outeax) : "a" (1) : "%ebx", "%ecx", "%edx");
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id.stepping = outeax & 0xf;
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outeax >>= 4;
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id.model = outeax & 0xf;
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outeax >>= 4;
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id.family = outeax & 0xf;
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outeax >>= 8;
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id.ext_model = outeax & 0xf;
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outeax >>= 4;
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id.ext_family = outeax & 0xff;
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if (0xf == id.family) {
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/* Intel says always do this, AMD says only for family f */
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id.model |= (id.ext_model << 4);
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id.family += id.ext_family;
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}
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return &id;
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}
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