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