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| Rev | Author | Line No. | Line |
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| 1 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
| 1 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 1888 | jermar | 35 | #ifndef KERN_ia32_CPUID_H_ |
| 36 | #define KERN_ia32_CPUID_H_ |
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| 1 | jermar | 37 | |
| 38 | #include <arch/types.h> |
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| 39 | |||
| 2079 | decky | 40 | typedef struct { |
| 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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| 2079 | decky | 45 | } __attribute__ ((packed)) cpu_info_t; |
| 1 | jermar | 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 | |
| 2082 | decky | 79 | asm volatile ( |
| 408 | decky | 80 | "pushf\n" /* read flags */ |
| 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 | |
| 2079 | decky | 100 | static inline void cpuid(uint32_t cmd, cpu_info_t *info) |
| 348 | jermar | 101 | { |
| 2082 | decky | 102 | asm volatile ( |
| 408 | decky | 103 | "movl %4, %%eax\n" |
| 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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| 2314 | decky | 110 | : "=a" (info->cpuid_eax), "=b" (info->cpuid_ebx), "=c" (info->cpuid_ecx), "=d" (info->cpuid_edx) |
| 408 | decky | 111 | : "m" (cmd) |
| 112 | ); |
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| 348 | jermar | 113 | } |
| 1 | jermar | 114 | |
| 115 | #endif |
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| 1702 | cejka | 116 | |
| 1731 | jermar | 117 | /** @} |
| 1702 | cejka | 118 | */ |