Stephen Hines | 51a0ffb | 2014-02-14 00:25:07 -0800 | [diff] [blame] | 1 | /*===---- cpuid.h - X86 cpu model detection --------------------------------=== |
| 2 | * |
| 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 | * of this software and associated documentation files (the "Software"), to deal |
| 5 | * in the Software without restriction, including without limitation the rights |
| 6 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 | * copies of the Software, and to permit persons to whom the Software is |
| 8 | * furnished to do so, subject to the following conditions: |
| 9 | * |
| 10 | * The above copyright notice and this permission notice shall be included in |
| 11 | * all copies or substantial portions of the Software. |
| 12 | * |
| 13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 | * THE SOFTWARE. |
| 20 | * |
| 21 | *===-----------------------------------------------------------------------=== |
| 22 | */ |
| 23 | |
| 24 | #if !(__x86_64__ || __i386__) |
| 25 | #error this header is for x86 only |
| 26 | #endif |
| 27 | |
| 28 | /* Features in %ecx for level 1 */ |
| 29 | #define bit_SSE3 0x00000001 |
| 30 | #define bit_PCLMULQDQ 0x00000002 |
| 31 | #define bit_DTES64 0x00000004 |
| 32 | #define bit_MONITOR 0x00000008 |
| 33 | #define bit_DSCPL 0x00000010 |
| 34 | #define bit_VMX 0x00000020 |
| 35 | #define bit_SMX 0x00000040 |
| 36 | #define bit_EIST 0x00000080 |
| 37 | #define bit_TM2 0x00000100 |
| 38 | #define bit_SSSE3 0x00000200 |
| 39 | #define bit_CNXTID 0x00000400 |
| 40 | #define bit_FMA 0x00001000 |
| 41 | #define bit_CMPXCHG16B 0x00002000 |
| 42 | #define bit_xTPR 0x00004000 |
| 43 | #define bit_PDCM 0x00008000 |
| 44 | #define bit_PCID 0x00020000 |
| 45 | #define bit_DCA 0x00040000 |
| 46 | #define bit_SSE41 0x00080000 |
| 47 | #define bit_SSE42 0x00100000 |
| 48 | #define bit_x2APIC 0x00200000 |
| 49 | #define bit_MOVBE 0x00400000 |
| 50 | #define bit_POPCNT 0x00800000 |
| 51 | #define bit_TSCDeadline 0x01000000 |
| 52 | #define bit_AESNI 0x02000000 |
| 53 | #define bit_XSAVE 0x04000000 |
| 54 | #define bit_OSXSAVE 0x08000000 |
| 55 | #define bit_AVX 0x10000000 |
| 56 | #define bit_RDRAND 0x40000000 |
| 57 | |
| 58 | /* Features in %edx for level 1 */ |
| 59 | #define bit_FPU 0x00000001 |
| 60 | #define bit_VME 0x00000002 |
| 61 | #define bit_DE 0x00000004 |
| 62 | #define bit_PSE 0x00000008 |
| 63 | #define bit_TSC 0x00000010 |
| 64 | #define bit_MSR 0x00000020 |
| 65 | #define bit_PAE 0x00000040 |
| 66 | #define bit_MCE 0x00000080 |
| 67 | #define bit_CX8 0x00000100 |
| 68 | #define bit_APIC 0x00000200 |
| 69 | #define bit_SEP 0x00000800 |
| 70 | #define bit_MTRR 0x00001000 |
| 71 | #define bit_PGE 0x00002000 |
| 72 | #define bit_MCA 0x00004000 |
| 73 | #define bit_CMOV 0x00008000 |
| 74 | #define bit_PAT 0x00010000 |
| 75 | #define bit_PSE36 0x00020000 |
| 76 | #define bit_PSN 0x00040000 |
| 77 | #define bit_CLFSH 0x00080000 |
| 78 | #define bit_DS 0x00200000 |
| 79 | #define bit_ACPI 0x00400000 |
| 80 | #define bit_MMX 0x00800000 |
| 81 | #define bit_FXSR 0x01000000 |
| 82 | #define bit_SSE 0x02000000 |
| 83 | #define bit_SSE2 0x04000000 |
| 84 | #define bit_SS 0x08000000 |
| 85 | #define bit_HTT 0x10000000 |
| 86 | #define bit_TM 0x20000000 |
| 87 | #define bit_PBE 0x80000000 |
| 88 | |
| 89 | /* Features in %ebx for level 7 sub-leaf 0 */ |
| 90 | #define bit_FSGSBASE 0x00000001 |
| 91 | #define bit_SMEP 0x00000080 |
| 92 | #define bit_ENH_MOVSB 0x00000200 |
| 93 | |
| 94 | /* PIC on i386 uses %ebx, so preserve it. */ |
| 95 | #if __i386__ |
| 96 | #define __cpuid(__level, __eax, __ebx, __ecx, __edx) \ |
| 97 | __asm(" pushl %%ebx\n" \ |
| 98 | " cpuid\n" \ |
| 99 | " mov %%ebx,%1\n" \ |
| 100 | " popl %%ebx" \ |
| 101 | : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ |
| 102 | : "0"(__level)) |
| 103 | |
| 104 | #define __cpuid_count(__level, __count, __eax, __ebx, __ecx, __edx) \ |
| 105 | __asm(" pushl %%ebx\n" \ |
| 106 | " cpuid\n" \ |
| 107 | " mov %%ebx,%1\n" \ |
| 108 | " popl %%ebx" \ |
| 109 | : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ |
| 110 | : "0"(__level), "2"(__count)) |
| 111 | #else |
| 112 | #define __cpuid(__level, __eax, __ebx, __ecx, __edx) \ |
| 113 | __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ |
| 114 | : "0"(__level)) |
| 115 | |
| 116 | #define __cpuid_count(__level, __count, __eax, __ebx, __ecx, __edx) \ |
| 117 | __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ |
| 118 | : "0"(__level), "2"(__count)) |
| 119 | #endif |
| 120 | |
| 121 | static __inline int __get_cpuid (unsigned int __level, unsigned int *__eax, |
| 122 | unsigned int *__ebx, unsigned int *__ecx, |
| 123 | unsigned int *__edx) { |
| 124 | __cpuid(__level, *__eax, *__ebx, *__ecx, *__edx); |
| 125 | return 1; |
| 126 | } |
| 127 | |
| 128 | static __inline int __get_cpuid_max (unsigned int __level, unsigned int *__sig) |
| 129 | { |
| 130 | unsigned int __eax, __ebx, __ecx, __edx; |
| 131 | #if __i386__ |
| 132 | int __cpuid_supported; |
| 133 | |
| 134 | __asm(" pushfl\n" |
| 135 | " popl %%eax\n" |
| 136 | " movl %%eax,%%ecx\n" |
| 137 | " xorl $0x00200000,%%eax\n" |
| 138 | " pushl %%eax\n" |
| 139 | " popfl\n" |
| 140 | " pushfl\n" |
| 141 | " popl %%eax\n" |
| 142 | " movl $0,%0\n" |
| 143 | " cmpl %%eax,%%ecx\n" |
| 144 | " je 1f\n" |
| 145 | " movl $1,%0\n" |
| 146 | "1:" |
| 147 | : "=r" (__cpuid_supported) : : "eax", "ecx"); |
| 148 | if (!__cpuid_supported) |
| 149 | return 0; |
| 150 | #endif |
| 151 | |
| 152 | __cpuid(__level, __eax, __ebx, __ecx, __edx); |
| 153 | if (__sig) |
| 154 | *__sig = __ebx; |
| 155 | return __eax; |
| 156 | } |