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| 1 | ; $Id: cpuhlp.asm,v 1.4 2000-10-03 17:28:29 sandervl Exp $
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| 2 |
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| 3 | ;/*
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| 4 | ; * Project Odin Software License can be found in LICENSE.TXT
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| 5 | ; * CPU detection functions
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| 6 | ; *
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| 7 | ; * Copyright 1999 Sander van Leeuwen
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| 8 | ; *
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| 9 | ; */
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| 10 | .586
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| 11 | NAME cpuhlp
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| 12 |
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| 13 | DATA32 SEGMENT DWORD PUBLIC USE32 'DATA'
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| 14 | ASSUME DS:FLAT,SS:FLAT
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| 15 |
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| 16 | PUBLIC CPUFeatures
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| 17 | CPUFeatures dd 0
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| 18 |
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| 19 | DATA32 ENDS
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| 20 |
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| 21 | CODE32 SEGMENT DWORD PUBLIC USE32 'CODE'
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| 22 |
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| 23 | public _SupportsCPUID
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| 24 |
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| 25 | _SupportsCPUID proc near
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| 26 | pushfd
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| 27 | push ecx
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| 28 |
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| 29 | pushfd
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| 30 | pop eax
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| 31 | mov ecx, eax
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| 32 | xor eax, 200000h ;flip bit 21
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| 33 | push eax
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| 34 | popfd
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| 35 | pushfd
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| 36 | pop eax
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| 37 | cmp eax, ecx ;bit 21 changed -> has cpuid support
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| 38 | jnz @supportscpuid
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| 39 | xor eax, eax
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| 40 | jmp short @end
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| 41 |
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| 42 | @supportscpuid:
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| 43 | mov eax, 1
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| 44 | @end:
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| 45 | pop ecx
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| 46 | popfd
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| 47 | ret
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| 48 | _SupportsCPUID endp
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| 49 |
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| 50 | public _GetCPUVendorString
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| 51 |
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| 52 | _GetCPUVendorString proc near
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| 53 | push ebp
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| 54 | mov ebp, esp
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| 55 | push ebx
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| 56 | push ecx
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| 57 | push edx
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| 58 | push esi
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| 59 |
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| 60 | mov esi, [ebp+8] ;ptr to string
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| 61 | mov eax, 0
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| 62 | cpuid
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| 63 |
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| 64 | mov [esi], ebx
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| 65 | mov [esi+4], edx
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| 66 | mov [esi+8], ecx
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| 67 |
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| 68 | pop esi
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| 69 | pop edx
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| 70 | pop ecx
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| 71 | pop ebx
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| 72 | pop ebp
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| 73 | ret
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| 74 | _GetCPUVendorString endp
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| 75 |
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| 76 | public _GetCPUFeatures
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| 77 | _GetCPUFeatures proc near
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| 78 | push ebx
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| 79 | push ecx
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| 80 | push edx
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| 81 |
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| 82 | mov eax, 1
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| 83 | cpuid
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| 84 |
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| 85 | mov eax, edx
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| 86 |
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| 87 | mov [CPUFeatures], eax
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| 88 |
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| 89 | pop edx
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| 90 | pop ecx
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| 91 | pop ebx
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| 92 | ret
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| 93 | _GetCPUFeatures endp
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| 94 |
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| 95 | public _GetCPUSignature
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| 96 | _GetCPUSignature proc near
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| 97 | push ebx
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| 98 | push ecx
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| 99 | push edx
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| 100 |
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| 101 | mov eax, 1
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| 102 | cpuid
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| 103 |
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| 104 | pop edx
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| 105 | pop ecx
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| 106 | pop ebx
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| 107 | ret
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| 108 | _GetCPUSignature endp
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| 109 |
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| 110 |
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| 111 | _GetTSC proc near
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| 112 | push ebp
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| 113 | mov ebp, esp
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| 114 | push edx
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| 115 | push esi
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| 116 | push edi
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| 117 | rdtsc
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| 118 |
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| 119 | mov esi, [ebp+8] ;ptr to low dword
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| 120 | mov edi, [ebp+12] ;ptr to high dword
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| 121 | mov [esi], eax
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| 122 | mov [edi], edx
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| 123 |
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| 124 | pop edi
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| 125 | pop esi
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| 126 | pop edx
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| 127 | pop ebp
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| 128 | ret
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| 129 | _GetTSC endp
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| 130 |
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| 131 | CODE32 ENDS
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| 132 |
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| 133 | END
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