0,0 → 1,119 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - 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. |
* - 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 ``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 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. |
*/ |
|
/** @addtogroup ia32 |
* @{ |
*/ |
/** @file |
*/ |
|
#ifndef KERN_ia32_CPUID_H_ |
#define KERN_ia32_CPUID_H_ |
|
#include <arch/types.h> |
|
typedef struct { |
uint32_t cpuid_eax; |
uint32_t cpuid_ebx; |
uint32_t cpuid_ecx; |
uint32_t cpuid_edx; |
} __attribute__ ((packed)) cpu_info_t; |
|
struct __cpuid_extended_feature_info { |
unsigned sse3 : 1; |
unsigned : 31; |
} __attribute__ ((packed)); |
|
typedef union cpuid_extended_feature_info |
{ |
struct __cpuid_extended_feature_info bits; |
uint32_t word; |
}cpuid_extended_feature_info; |
|
|
struct __cpuid_feature_info { |
unsigned : 23; |
unsigned mmx : 1; |
unsigned fxsr : 1; |
unsigned sse : 1; |
unsigned sse2 : 1; |
unsigned : 5; |
} __attribute__ ((packed)); |
|
typedef union cpuid_feature_info |
{ |
struct __cpuid_feature_info bits; |
uint32_t word ; |
}cpuid_feature_info; |
|
|
static inline uint32_t has_cpuid(void) |
{ |
uint32_t val, ret; |
|
asm volatile ( |
"pushf\n" /* read flags */ |
"popl %0\n" |
"movl %0, %1\n" |
|
"btcl $21, %1\n" /* swap the ID bit */ |
|
"pushl %1\n" /* propagate the change into flags */ |
"popf\n" |
"pushf\n" |
"popl %1\n" |
|
"andl $(1 << 21), %0\n" /* interrested only in ID bit */ |
"andl $(1 << 21), %1\n" |
"xorl %1, %0\n" |
: "=r" (ret), "=r" (val) |
); |
|
return ret; |
} |
|
static inline void cpuid(uint32_t cmd, cpu_info_t *info) |
{ |
asm volatile ( |
"movl %4, %%eax\n" |
"cpuid\n" |
|
"movl %%eax, %0\n" |
"movl %%ebx, %1\n" |
"movl %%ecx, %2\n" |
"movl %%edx, %3\n" |
: "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx) |
: "m" (cmd) |
: "eax", "ebx", "ecx", "edx" |
); |
} |
|
#endif |
|
/** @} |
*/ |