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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
1731 | jermar | 29 | /** @addtogroup ia32 |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
860 | decky | 35 | #ifndef __ia32_CPUID_H__ |
36 | #define __ia32_CPUID_H__ |
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1 | jermar | 37 | |
38 | #include <arch/types.h> |
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39 | |||
40 | struct cpu_info { |
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1780 | jermar | 41 | uint32_t cpuid_eax; |
42 | uint32_t cpuid_ebx; |
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43 | uint32_t cpuid_ecx; |
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44 | uint32_t cpuid_edx; |
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1 | jermar | 45 | } __attribute__ ((packed)); |
46 | |||
1019 | vana | 47 | struct __cpuid_extended_feature_info { |
48 | unsigned sse3 : 1; |
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49 | unsigned : 31; |
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50 | } __attribute__ ((packed)); |
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51 | |||
52 | typedef union cpuid_extended_feature_info |
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53 | { |
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54 | struct __cpuid_extended_feature_info bits; |
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1780 | jermar | 55 | uint32_t word; |
1019 | vana | 56 | }cpuid_extended_feature_info; |
57 | |||
58 | |||
59 | struct __cpuid_feature_info { |
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60 | unsigned : 23; |
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61 | unsigned mmx : 1; |
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62 | unsigned fxsr : 1; |
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63 | unsigned sse : 1; |
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64 | unsigned sse2 : 1; |
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65 | unsigned : 5; |
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66 | } __attribute__ ((packed)); |
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67 | |||
68 | typedef union cpuid_feature_info |
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69 | { |
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70 | struct __cpuid_feature_info bits; |
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1780 | jermar | 71 | uint32_t word ; |
1019 | vana | 72 | }cpuid_feature_info; |
73 | |||
74 | |||
1780 | jermar | 75 | static inline uint32_t has_cpuid(void) |
408 | decky | 76 | { |
1780 | jermar | 77 | uint32_t val, ret; |
408 | decky | 78 | |
79 | __asm__ volatile ( |
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80 | "pushf\n" /* read flags */ |
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81 | "popl %0\n" |
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82 | "movl %0, %1\n" |
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83 | |||
84 | "btcl $21, %1\n" /* swap the ID bit */ |
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85 | |||
86 | "pushl %1\n" /* propagate the change into flags */ |
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87 | "popf\n" |
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88 | "pushf\n" |
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89 | "popl %1\n" |
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90 | |||
91 | "andl $(1 << 21), %0\n" /* interrested only in ID bit */ |
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92 | "andl $(1 << 21), %1\n" |
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93 | "xorl %1, %0\n" |
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94 | : "=r" (ret), "=r" (val) |
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95 | ); |
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96 | |||
97 | return ret; |
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98 | } |
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1 | jermar | 99 | |
1780 | jermar | 100 | static inline void cpuid(uint32_t cmd, struct cpu_info *info) |
348 | jermar | 101 | { |
408 | decky | 102 | __asm__ volatile ( |
103 | "movl %4, %%eax\n" |
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104 | "cpuid\n" |
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105 | |||
106 | "movl %%eax, %0\n" |
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107 | "movl %%ebx, %1\n" |
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108 | "movl %%ecx, %2\n" |
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109 | "movl %%edx, %3\n" |
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110 | : "=m" (info->cpuid_eax), "=m" (info->cpuid_ebx), "=m" (info->cpuid_ecx), "=m" (info->cpuid_edx) |
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111 | : "m" (cmd) |
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112 | : "eax", "ebx", "ecx", "edx" |
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113 | ); |
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348 | jermar | 114 | } |
1 | jermar | 115 | |
116 | #endif |
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1702 | cejka | 117 | |
1731 | jermar | 118 | /** @} |
1702 | cejka | 119 | */ |
120 |