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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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7733 | dunkaist | 3 | ;; Copyright (C) KolibriOS team 2004-2020. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 7733 $ |
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9 | |||
10 | align 4 |
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11 | proc mem_test |
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12 | ; if we have BIOS with fn E820, skip the test |
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7132 | dunkaist | 13 | cmp dword [BOOT_LO.memmap_block_cnt], 0 |
2288 | clevermous | 14 | jnz .ret |
15 | |||
16 | mov eax, cr0 |
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17 | and eax, not (CR0_CD+CR0_NW) |
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18 | or eax, CR0_CD ;disable caching |
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19 | mov cr0, eax |
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20 | wbinvd ;invalidate cache |
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21 | |||
22 | xor edi, edi |
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23 | mov ebx, 'TEST' |
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24 | @@: |
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25 | add edi, 0x100000 |
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26 | xchg ebx, dword [edi] |
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27 | cmp dword [edi], 'TEST' |
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28 | xchg ebx, dword [edi] |
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29 | je @b |
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30 | |||
31 | and eax, not (CR0_CD+CR0_NW) ;enable caching |
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32 | mov cr0, eax |
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7132 | dunkaist | 33 | inc dword [BOOT_LO.memmap_block_cnt] |
2288 | clevermous | 34 | xor eax, eax |
7132 | dunkaist | 35 | mov [BOOT_LO.memmap_blocks + e820entry.addr.lo], eax |
36 | mov [BOOT_LO.memmap_blocks + e820entry.addr.hi], eax |
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37 | mov [BOOT_LO.memmap_blocks + e820entry.size.lo], edi |
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38 | mov [BOOT_LO.memmap_blocks + e820entry.size.hi], eax |
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4390 | clevermous | 39 | inc eax |
7132 | dunkaist | 40 | mov [BOOT_LO.memmap_blocks + e820entry.type], eax |
2288 | clevermous | 41 | .ret: |
42 | ret |
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43 | endp |
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44 | |||
45 | align 4 |
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46 | proc init_mem |
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47 | ; calculate maximum allocatable address and number of allocatable pages |
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7132 | dunkaist | 48 | mov edi, BOOT_LO.memmap_blocks |
2288 | clevermous | 49 | mov ecx, [edi-4] |
50 | xor esi, esi; esi will hold total amount of memory |
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51 | xor edx, edx; edx will hold maximum allocatable address |
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52 | .calcmax: |
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53 | ; round all to pages |
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54 | mov eax, [edi] |
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2466 | Serge | 55 | cmp [edi+16], byte 1 |
56 | jne .unusable |
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57 | |||
2288 | clevermous | 58 | test eax, 0xFFF |
59 | jz @f |
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60 | neg eax |
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61 | and eax, 0xFFF |
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62 | add [edi], eax |
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63 | adc dword [edi+4], 0 |
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64 | sub [edi+8], eax |
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65 | sbb dword [edi+12], 0 |
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66 | jc .unusable |
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67 | @@: |
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68 | and dword [edi+8], not 0xFFF |
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69 | jz .unusable |
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70 | ; ignore memory after 4 Gb |
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71 | cmp dword [edi+4], 0 |
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72 | jnz .unusable |
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73 | mov eax, [edi] |
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74 | cmp dword [edi+12], 0 |
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75 | jnz .overflow |
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76 | add eax, [edi+8] |
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77 | jnc @f |
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78 | .overflow: |
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79 | mov eax, 0xFFFFF000 |
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80 | @@: |
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81 | cmp edx, eax |
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82 | jae @f |
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83 | mov edx, eax |
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84 | @@: |
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85 | sub eax, [edi] |
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86 | mov [edi+8], eax |
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87 | add esi, eax |
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88 | jmp .usable |
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89 | .unusable: |
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2466 | Serge | 90 | ; and dword [edi+8], 0 |
2288 | clevermous | 91 | .usable: |
92 | add edi, 20 |
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93 | loop .calcmax |
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94 | .calculated: |
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95 | mov [MEM_AMOUNT-OS_BASE], esi |
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96 | mov [pg_data.mem_amount-OS_BASE], esi |
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97 | shr esi, 12 |
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98 | mov [pg_data.pages_count-OS_BASE], esi |
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99 | |||
100 | shr edx, 12 |
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101 | add edx, 31 |
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102 | and edx, not 31 |
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103 | shr edx, 3 |
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104 | mov [pg_data.pagemap_size-OS_BASE], edx |
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105 | |||
106 | add edx, (sys_pgmap-OS_BASE)+4095 |
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107 | and edx, not 4095 |
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108 | mov [tmp_page_tabs], edx |
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109 | |||
110 | mov edx, esi |
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111 | and edx, -1024 |
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112 | cmp edx, (OS_BASE/4096) |
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113 | jbe @F |
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114 | mov edx, (OS_BASE/4096) |
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115 | jmp .set |
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116 | @@: |
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117 | cmp edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
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118 | jae .set |
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119 | mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
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120 | .set: |
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121 | mov [pg_data.kernel_pages-OS_BASE], edx |
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122 | shr edx, 10 |
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123 | mov [pg_data.kernel_tables-OS_BASE], edx |
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124 | |||
125 | xor eax, eax |
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5130 | serge | 126 | mov edi, sys_proc-OS_BASE |
127 | mov ecx, 8192/4 |
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2288 | clevermous | 128 | cld |
129 | rep stosd |
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130 | |||
5130 | serge | 131 | mov edx, (sys_proc-OS_BASE+PROC.pdt_0)+ 0x800; (OS_BASE shr 20) |
2288 | clevermous | 132 | bt [cpu_caps-OS_BASE], CAPS_PSE |
133 | jnc .no_PSE |
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134 | |||
135 | mov ebx, cr4 |
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136 | or ebx, CR4_PSE |
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5356 | serge | 137 | mov eax, PDE_LARGE+PG_SWR |
2288 | clevermous | 138 | mov cr4, ebx |
139 | dec [pg_data.kernel_tables-OS_BASE] |
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140 | |||
141 | mov [edx], eax |
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142 | add edx, 4 |
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143 | |||
144 | mov edi, [tmp_page_tabs] |
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145 | jmp .map_kernel_heap ; new kernel fits to the first 4Mb - nothing to do with ".map_low" |
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146 | .no_PSE: |
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5356 | serge | 147 | mov eax, PG_SWR |
2288 | clevermous | 148 | mov ecx, [tmp_page_tabs] |
149 | shr ecx, 12 |
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150 | .map_low: |
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151 | mov edi, [tmp_page_tabs] |
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152 | @@: ; |
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153 | stosd |
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154 | add eax, 0x1000 |
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155 | dec ecx |
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156 | jnz @B |
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157 | |||
158 | .map_kernel_heap: |
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159 | mov ecx, [pg_data.kernel_tables-OS_BASE] |
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160 | shl ecx, 10 |
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161 | xor eax, eax |
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162 | rep stosd |
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163 | |||
164 | mov ecx, [pg_data.kernel_tables-OS_BASE] |
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165 | mov eax, [tmp_page_tabs] |
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5356 | serge | 166 | or eax, PG_SWR |
2288 | clevermous | 167 | mov edi, edx |
168 | |||
169 | .map_kernel_tabs: |
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170 | stosd |
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171 | add eax, 0x1000 |
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172 | dec ecx |
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173 | jnz .map_kernel_tabs |
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174 | |||
5356 | serge | 175 | mov dword [sys_proc-OS_BASE+PROC.pdt_0+(page_tabs shr 20)], sys_proc+PROC.pdt_0+PG_SWR-OS_BASE |
2288 | clevermous | 176 | |
5130 | serge | 177 | mov edi, (sys_proc+PROC.pdt_0-OS_BASE) |
2288 | clevermous | 178 | lea esi, [edi+(OS_BASE shr 20)] |
179 | movsd |
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180 | movsd |
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181 | ret |
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182 | endp |
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183 | |||
184 | align 4 |
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185 | proc init_page_map |
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186 | ; mark all memory as unavailable |
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187 | mov edi, sys_pgmap-OS_BASE |
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188 | mov ecx, [pg_data.pagemap_size-OS_BASE] |
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189 | shr ecx, 2 |
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190 | xor eax, eax |
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191 | cld |
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192 | rep stosd |
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193 | |||
194 | ; scan through memory map and mark free areas as available |
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7132 | dunkaist | 195 | mov ebx, BOOT_LO.memmap_blocks |
2288 | clevermous | 196 | mov edx, [ebx-4] |
197 | .scanmap: |
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2466 | Serge | 198 | cmp [ebx+16], byte 1 |
199 | jne .next |
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200 | |||
2288 | clevermous | 201 | mov ecx, [ebx+8] |
202 | shr ecx, 12; ecx = number of pages |
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203 | jz .next |
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204 | mov edi, [ebx] |
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205 | shr edi, 12; edi = first page |
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206 | mov eax, edi |
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207 | shr edi, 5 |
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208 | shl edi, 2 |
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209 | add edi, sys_pgmap-OS_BASE |
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210 | and eax, 31 |
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211 | jz .startok |
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212 | add ecx, eax |
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213 | sub ecx, 32 |
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214 | jbe .onedword |
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215 | push ecx |
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216 | mov ecx, eax |
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217 | or eax, -1 |
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218 | shl eax, cl |
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219 | or [edi], eax |
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220 | add edi, 4 |
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221 | pop ecx |
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222 | .startok: |
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223 | push ecx |
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224 | shr ecx, 5 |
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225 | or eax, -1 |
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226 | rep stosd |
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227 | pop ecx |
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228 | and ecx, 31 |
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229 | neg eax |
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230 | shl eax, cl |
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231 | dec eax |
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232 | or [edi], eax |
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233 | jmp .next |
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234 | .onedword: |
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235 | add ecx, 32 |
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236 | sub ecx, eax |
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237 | @@: |
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238 | bts [edi], eax |
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239 | inc eax |
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240 | loop @b |
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241 | .next: |
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242 | add ebx, 20 |
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243 | dec edx |
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244 | jnz .scanmap |
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245 | |||
246 | ; mark kernel memory as allocated (unavaila |