diff options
Diffstat (limited to 'util/msrtool/sys.c')
| -rw-r--r-- | util/msrtool/sys.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/util/msrtool/sys.c b/util/msrtool/sys.c new file mode 100644 index 0000000000..95539c8677 --- /dev/null +++ b/util/msrtool/sys.c @@ -0,0 +1,42 @@ +/* + * 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; +} |