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Rev | Author | Line No. | Line |
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750 | victor | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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983 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
750 | victor | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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593 | mikedld | 7 | |
465 | serge | 8 | $Revision: 2047 $ |
9 | |||
593 | mikedld | 10 | |
1683 | art_zh | 11 | MEM_WB equ 6 ;write-back memory |
12 | MEM_WC equ 1 ;write combined memory |
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13 | MEM_UC equ 0 ;uncached memory |
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465 | serge | 14 | |
1683 | art_zh | 15 | ; ====================================================================== |
16 | align 4 |
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17 | preinit_mem: |
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465 | serge | 18 | |
1952 | art_zh | 19 | ; clear [CLEAN_ZONE..HEAP_BASE] |
1683 | art_zh | 20 | xor eax,eax |
2047 | art_zh | 21 | mov edi,CLEAN_ZONE ; 0x280000 = ramdisk FAT ? |
1941 | art_zh | 22 | mov ecx,(HEAP_BASE-OS_BASE-CLEAN_ZONE) / 4 |
1683 | art_zh | 23 | cld |
24 | rep stosd |
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25 | |||
26 | ; clear [0x40000..0x90000] |
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27 | mov edi,0x50000 ; 0x50000 is somewhere inside kernel code? |
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28 | mov ecx,(0x90000-0x50000)/4 |
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29 | rep stosd |
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30 | |||
31 | ; clear undefined kernel globals |
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32 | mov edi, endofcode-OS_BASE |
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33 | mov ecx, (uglobals_size/4)+4 |
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34 | rep stosd |
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35 | |||
36 | ; save [0..0xffff] |
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37 | xor esi, esi |
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2047 | art_zh | 38 | mov edi, (BOOT_VAR - OS_BASE) ; low mem storage area |
1683 | art_zh | 39 | mov ecx, 0x10000 / 4 |
40 | rep movsd |
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41 | ; clear [0x1000..0x0ffff] |
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42 | mov edi,0x1000 |
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43 | mov ecx,0xf000 / 4 |
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44 | rep stosd |
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45 | |||
46 | ; clear |
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47 | mov edi, sys_pgdir-OS_BASE |
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48 | mov ecx, 4096/4 |
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49 | rep stosd |
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50 | ret |
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51 | |||
52 | ; ====================================================================== |
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465 | serge | 53 | align 4 |
54 | proc init_mem |
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55 | |||
2047 | art_zh | 56 | mov ecx, 0xC001001A ; Top of Memory MSR |
57 | xor edi, edi |
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58 | rdmsr |
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59 | mov esi, eax ; esi = total amount of memory |
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60 | mov ecx, 0x0200 |
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61 | .read_mtrr: |
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62 | rdmsr |
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63 | and eax, 0xFFF00000 ; not just bitcleaning |
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64 | jz .next_mtrr ; ignore the main memory and free MTRRs |
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65 | cmp esi, eax |
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66 | jb .next_mtrr ; ignore MMIO blocks |
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67 | mov esi, eax |
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68 | .next_mtrr: |
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69 | add cl, 2 |
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70 | cmp cl, 0x10 |
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71 | jb .read_mtrr |
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72 | |||
73 | mov eax, USER_DMA_SIZE |
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74 | sub esi, eax ; exclude the Global DMA block... |
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75 | and esi, 0xFF800000 ; ...and the hole above it |
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76 | mov eax, esi |
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77 | mov [MEM_AMOUNT-OS_BASE], eax |
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78 | mov [pg_data.mem_amount-OS_BASE], eax ; the true MEMTOP |
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79 | mov [UserDMAaddr-OS_BASE], eax |
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80 | |||
1683 | art_zh | 81 | mov edx, esi ; edx will hold maximum allocatable address |
82 | shr esi, 12 |
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83 | mov [pg_data.pages_count-OS_BASE], esi ; max number of PTEs ? |
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513 | serge | 84 | |
1683 | art_zh | 85 | shr edx, 12 |
86 | add edx, 31 |
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87 | and edx, not 31 |
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88 | shr edx, 3 |
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89 | mov [pg_data.pagemap_size-OS_BASE], edx ; size of sys_pgmap structure |
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465 | serge | 90 | |
1683 | art_zh | 91 | add edx, (sys_pgmap-OS_BASE)+4095 |
92 | and edx, not 4095 |
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93 | mov [tmp_page_tabs], edx ; free zone to build PTEs |
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465 | serge | 94 | |
1683 | art_zh | 95 | mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
96 | mov [pg_data.kernel_pages -OS_BASE], edx |
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97 | shr edx, 10 |
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98 | mov [pg_data.kernel_tables-OS_BASE], edx |
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465 | serge | 99 | |
1683 | art_zh | 100 | mov edx, (sys_pgdir-OS_BASE)+ 0x800 ; (0x800 = OS_BASE shr 20) |
465 | serge | 101 | |
1683 | art_zh | 102 | mov ebx, cr4 |
103 | or ebx, CR4_PSE |
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104 | mov eax, PG_LARGE+PG_SW |
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105 | mov cr4, ebx |
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106 | dec [pg_data.kernel_tables-OS_BASE] |
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465 | serge | 107 | |
1683 | art_zh | 108 | mov [edx], eax ; map first (physical) 4M bytes |
109 | add edx, 4 |
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465 | serge | 110 | |
1683 | art_zh | 111 | mov edi, [tmp_page_tabs] |
1952 | art_zh | 112 | mov ecx, [pg_data.kernel_pages -OS_BASE] ; safety cleaning of already-zeroed space |
113 | xor eax, eax |
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114 | rep stosd |
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1683 | art_zh | 115 | |
116 | mov ecx, [pg_data.kernel_tables-OS_BASE] ; build some PDEs to hold empty PTEs |
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117 | mov eax, [tmp_page_tabs] |
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118 | or eax, PG_SW |
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119 | mov edi, edx ; edi = sys_pgdir+0x804 |
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1952 | art_zh | 120 | |
465 | serge | 121 | .map_kernel_tabs: |
1683 | art_zh | 122 | stosd |
123 | add eax, 0x1000 |
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124 | dec ecx |
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125 | jnz .map_kernel_tabs |
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465 | serge | 126 | |
1683 | art_zh | 127 | ; map pagetables to linear space |
128 | mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE |
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465 | serge | 129 | |
1683 | art_zh | 130 | mov edi, (sys_pgdir-OS_BASE) |
131 | lea esi, [edi+(OS_BASE shr 20)] |
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132 | movsd |
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133 | movsd |
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134 | ret |
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465 | serge | 135 | endp |
136 | |||
137 | align 4 |
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138 | proc init_page_map |
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1103 | diamond | 139 | ; mark all memory as unavailable |
1683 | art_zh | 140 | mov edi, sys_pgmap-OS_BASE |
141 | mov ecx, [pg_data.pagemap_size-OS_BASE] |
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142 | shr ecx, 2 |
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143 | xor eax, eax |
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144 | cld |
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145 | rep stosd |
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465 | serge | 146 | |
1103 | diamond | 147 | ; scan through memory map and mark free areas as available |
1683 | art_zh | 148 | mov ebx, BOOT_VAR-OS_BASE + 0x9104 |
149 | mov edx, [ebx-4] |
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1103 | diamond | 150 | .scanmap: |
1683 | art_zh | 151 | mov ecx, [ebx+8] |
152 | shr ecx, 12 ; ecx = number of pages |
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153 | jz .next |
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154 | mov edi, [ebx] |
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155 | shr edi, 12 ; edi = first page |
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156 | mov eax, edi |
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157 | shr edi, 5 |
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158 | shl edi, 2 |
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159 | add edi, sys_pgmap-OS_BASE |
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160 | and eax, 31 |
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161 | jz .startok |
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162 | add ecx, eax |
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163 | sub ecx, 32 |
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164 | jbe .onedword |
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165 | push ecx |
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166 | mov ecx, eax |
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167 | or eax, -1 |
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168 | shl eax, cl |
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169 | or [edi], eax |
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170 | add edi, 4 |
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171 | pop ecx |
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1103 | diamond | 172 | .startok: |
1683 | art_zh | 173 | push ecx |
174 | shr ecx, 5 |
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175 | or eax, -1 |
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176 | rep stosd |
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177 | pop ecx |
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178 | and ecx, 31 |
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179 | neg eax |
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180 | shl eax, cl |
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181 | dec eax |
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182 | or [edi], eax |
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183 | jmp .next |
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1103 | diamond | 184 | .onedword: |
1683 | art_zh | 185 | add ecx, 32 |
186 | sub ecx, eax |
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1103 | diamond | 187 | @@: |
1683 | art_zh | 188 | bts [edi], eax |
189 | inc eax |
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190 | loop @b |
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1103 | diamond | 191 | .next: |
1683 | art_zh | 192 | add ebx, 20 |
193 | dec edx |
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194 | jnz .scanmap |
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1103 | diamond | 195 | |
196 | ; mark kernel memory as allocated (unavailable) |
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1683 | art_zh | 197 | mov ecx, [tmp_page_tabs] |
198 | mov edx, [pg_data.pages_count-OS_BASE] |
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199 | shr ecx, 12 |
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200 | add ecx, [pg_data.kernel_tables-OS_BASE] |
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201 | sub edx, ecx |
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202 | mov [pg_data.pages_free-OS_BASE], edx |
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465 | serge | 203 | |
1683 | art_zh | 204 | mov edi, sys_pgmap-OS_BASE |
205 | mov ebx, ecx |
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206 | shr ecx, 5 |
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207 | xor eax, eax |
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208 | rep stosd |
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465 | serge | 209 | |
1683 | art_zh | 210 | not eax |
211 | mov ecx, ebx |
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212 | and ecx, 31 |
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213 | shl eax, cl |
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214 | and [edi], eax |
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215 | add edi, OS_BASE |
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216 | mov [page_start-OS_BASE], edi; |
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465 | serge | 217 | |
1683 | art_zh | 218 | mov ebx, sys_pgmap |
219 | add ebx, [pg_data.pagemap_size-OS_BASE] |
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220 | mov [page_end-OS_BASE], ebx |
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465 | serge | 221 | |
1683 | art_zh | 222 | mov [pg_data.pg_mutex-OS_BASE], 0 |
223 | ret |
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465 | serge | 224 | endp |
225 | |||
226 | align 4 |
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586 | serge | 227 | |
228 | init_BIOS32: |
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1683 | art_zh | 229 | mov edi, 0xE0000 |
586 | serge | 230 | .pcibios_nxt: |
1683 | art_zh | 231 | cmp dword[edi], '_32_' ; "magic" word |
232 | je .BIOS32_found |
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586 | serge | 233 | .pcibios_nxt2: |
1683 | art_zh | 234 | add edi, 0x10 |
235 | cmp edi, 0xFFFF0 |
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236 | je .BIOS32_not_found |
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237 | jmp .pcibios_nxt |
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586 | serge | 238 | .BIOS32_found: ; magic word found, check control summ |
239 | |||
1683 | art_zh | 240 | movzx ecx, byte[edi + 9] |
241 | shl ecx, 4 |
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242 | mov esi, edi |
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243 | xor eax, eax |
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244 | cld ; paranoia |
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586 | serge | 245 | @@: lodsb |
1683 | art_zh | 246 | add ah, al |
247 | loop @b |
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248 | jnz .pcibios_nxt2 ; control summ must be zero |
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586 | serge | 249 | ; BIOS32 service found ! |
1683 | art_zh | 250 | mov ebp, [edi + 4] |
251 | mov [bios32_entry], ebp |
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586 | serge | 252 | ; check PCI BIOS present |
1683 | art_zh | 253 | mov eax, '$PCI' |
254 | xor ebx, ebx |
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255 | push cs ; special for 'ret far' from BIOS |
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256 | call ebp |
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257 | test al, al |
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258 | jnz .PCI_BIOS32_not_found |
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586 | serge | 259 | |
260 | ; здесь создаются дискрипторы для PCI BIOS |
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261 | |||
1683 | art_zh | 262 | add ebx, OS_BASE |
263 | dec ecx |
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264 | mov [(pci_code_32-OS_BASE)], cx ;limit 0-15 |
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265 | mov [(pci_data_32-OS_BASE)], cx ;limit 0-15 |
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586 | serge | 266 | |
1683 | art_zh | 267 | mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15 |
268 | mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15 |
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586 | serge | 269 | |
1683 | art_zh | 270 | shr ebx, 16 |
271 | mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23 |
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272 | mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23 |
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586 | serge | 273 | |
1683 | art_zh | 274 | shr ecx, 16 |
275 | and cl, 0x0F |
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276 | mov ch, bh |
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277 | add cx, D32 |
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278 | mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 & |
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279 | mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31 |
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586 | serge | 280 | |
1683 | art_zh | 281 | mov [(pci_bios_entry-OS_BASE)], edx |
282 | ; jmp .end |
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586 | serge | 283 | .PCI_BIOS32_not_found: |
284 | ; здесь должна заполнятся pci_emu_dat |
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285 | .BIOS32_not_found: |
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286 | .end: |
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1683 | art_zh | 287 | ret |
586 | serge | 288 | |
289 | align 4 |
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1683 | art_zh | 290 | test_cpu: ; only AMD machines supported |
465 | serge | 291 | |
1683 | art_zh | 292 | xor eax, eax |
293 | mov [cpu_caps-OS_BASE], eax |
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294 | mov [cpu_caps+4-OS_BASE], eax |
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465 | serge | 295 | |
1683 | art_zh | 296 | pushfd |
297 | pop eax |
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298 | mov ecx, eax |
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299 | xor eax, 0x40000 |
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300 | push eax |
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301 | popfd |
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302 | pushfd |
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303 | pop eax |
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304 | xor eax, ecx |
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305 | jz $ ; 386 |
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306 | push ecx |
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307 | popfd |
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465 | serge | 308 | |
1683 | art_zh | 309 | mov eax, ecx |
310 | xor eax, 0x200000 |
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311 | push eax |
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312 | popfd |
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313 | pushfd |
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314 | pop eax |
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315 | xor eax, ecx |
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316 | je $ ; 486 |
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465 | serge | 317 | |
1683 | art_zh | 318 | xor eax, eax |
319 | cpuid |
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465 | serge | 320 | |
1683 | art_zh | 321 | mov [cpu_vendor-OS_BASE], ebx |
322 | mov [cpu_vendor+4-OS_BASE], edx |
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323 | mov [cpu_vendor+8-OS_BASE], ecx |
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465 | serge | 324 | |
1683 | art_zh | 325 | cmp ebx, dword [AMD_str-OS_BASE] |
326 | jne $ |
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327 | cmp edx, dword [AMD_str+4-OS_BASE] |
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328 | jne $ |
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329 | cmp ecx, dword [AMD_str+8-OS_BASE] |
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330 | jne $ |
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331 | cmp eax, 1 |
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332 | jl $ |
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333 | mov eax, 1 |
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334 | cpuid |
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335 | mov [cpu_sign-OS_BASE], eax |
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336 | mov [cpu_info-OS_BASE], ebx |
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337 | mov [cpu_caps-OS_BASE], edx |
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338 | mov [cpu_caps+4-OS_BASE],ecx |
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339 | shr eax, 8 |
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340 | and eax, 0x0f |
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341 | ret |
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465 | serge | 342 |