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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | #ifndef __ia32_CPUID_H__ |
29 | #ifndef __ia32_CPUID_H__ |
| 30 | #define __ia32_CPUID_H__ |
30 | #define __ia32_CPUID_H__ |
| 31 | 31 | ||
| 32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
| 33 | 33 | ||
| 34 | struct cpu_info { |
34 | struct cpu_info { |
| 35 | __u32 cpuid_eax; |
35 | __u32 cpuid_eax; |
| 36 | __u32 cpuid_ebx; |
36 | __u32 cpuid_ebx; |
| 37 | __u32 cpuid_ecx; |
37 | __u32 cpuid_ecx; |
| 38 | __u32 cpuid_edx; |
38 | __u32 cpuid_edx; |
| 39 | } __attribute__ ((packed)); |
39 | } __attribute__ ((packed)); |
| 40 | 40 | ||
| - | 41 | struct __cpuid_extended_feature_info { |
|
| - | 42 | unsigned sse3 : 1; |
|
| - | 43 | unsigned : 31; |
|
| - | 44 | } __attribute__ ((packed)); |
|
| - | 45 | ||
| - | 46 | typedef union cpuid_extended_feature_info |
|
| - | 47 | { |
|
| - | 48 | struct __cpuid_extended_feature_info bits; |
|
| - | 49 | __u32 word; |
|
| - | 50 | }cpuid_extended_feature_info; |
|
| - | 51 | ||
| - | 52 | ||
| - | 53 | struct __cpuid_feature_info { |
|
| - | 54 | unsigned : 23; |
|
| - | 55 | unsigned mmx : 1; |
|
| - | 56 | unsigned fxsr : 1; |
|
| - | 57 | unsigned sse : 1; |
|
| - | 58 | unsigned sse2 : 1; |
|
| - | 59 | unsigned : 5; |
|
| - | 60 | } __attribute__ ((packed)); |
|
| - | 61 | ||
| - | 62 | typedef union cpuid_feature_info |
|
| - | 63 | { |
|
| - | 64 | struct __cpuid_feature_info bits; |
|
| - | 65 | __u32 word ; |
|
| - | 66 | }cpuid_feature_info; |
|
| - | 67 | ||
| - | 68 | ||
| 41 | static inline __u32 has_cpuid(void) |
69 | static inline __u32 has_cpuid(void) |
| 42 | { |
70 | { |
| 43 | __u32 val, ret; |
71 | __u32 val, ret; |
| 44 | 72 | ||
| 45 | __asm__ volatile ( |
73 | __asm__ volatile ( |
| 46 | "pushf\n" /* read flags */ |
74 | "pushf\n" /* read flags */ |
| 47 | "popl %0\n" |
75 | "popl %0\n" |
| 48 | "movl %0, %1\n" |
76 | "movl %0, %1\n" |
| 49 | 77 | ||
| 50 | "btcl $21, %1\n" /* swap the ID bit */ |
78 | "btcl $21, %1\n" /* swap the ID bit */ |
| 51 | 79 | ||
| 52 | "pushl %1\n" /* propagate the change into flags */ |
80 | "pushl %1\n" /* propagate the change into flags */ |
| 53 | "popf\n" |
81 | "popf\n" |
| 54 | "pushf\n" |
82 | "pushf\n" |
| 55 | "popl %1\n" |
83 | "popl %1\n" |
| 56 | 84 | ||
| 57 | "andl $(1 << 21), %0\n" /* interrested only in ID bit */ |
85 | "andl $(1 << 21), %0\n" /* interrested only in ID bit */ |
| 58 | "andl $(1 << 21), %1\n" |
86 | "andl $(1 << 21), %1\n" |
| 59 | "xorl %1, %0\n" |
87 | "xorl %1, %0\n" |
| 60 | : "=r" (ret), "=r" (val) |
88 | : "=r" (ret), "=r" (val) |
| 61 | ); |
89 | ); |
| 62 | 90 | ||
| 63 | return ret; |
91 | return ret; |
| 64 | } |
92 | } |
| 65 | 93 | ||
| 66 | static inline void cpuid(__u32 cmd, struct cpu_info *info) |
94 | static inline void cpuid(__u32 cmd, struct cpu_info *info) |
| 67 | { |
95 | { |
| 68 | __asm__ volatile ( |
96 | __asm__ volatile ( |
| 69 | "movl %4, %%eax\n" |
97 | "movl %4, %%eax\n" |
| 70 | "cpuid\n" |
98 | "cpuid\n" |
| 71 | 99 | ||
| 72 | "movl %%eax, %0\n" |
100 | "movl %%eax, %0\n" |
| 73 | "movl %%ebx, %1\n" |
101 | "movl %%ebx, %1\n" |
| 74 | "movl %%ecx, %2\n" |
102 | "movl %%ecx, %2\n" |
| 75 | "movl %%edx, %3\n" |
103 | "movl %%edx, %3\n" |
| 76 | : "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx) |
104 | : "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx) |
| 77 | : "m" (cmd) |
105 | : "m" (cmd) |
| 78 | : "eax", "ebx", "ecx", "edx" |
106 | : "eax", "ebx", "ecx", "edx" |
| 79 | ); |
107 | ); |
| 80 | } |
108 | } |
| 81 | 109 | ||
| 82 | #endif |
110 | #endif |
| 83 | 111 | ||