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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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