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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: 1952 $ |
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 |
1952 | 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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1952 | 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 | |||
1683 | art_zh | 56 | mov esi, (PCIe_CONFIG_SPACE-OS_BASE) ; esi will hold total amount of memory |
57 | mov edx, esi ; edx will hold maximum allocatable address |
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465 | serge | 58 | |
1683 | art_zh | 59 | mov [MEM_AMOUNT-OS_BASE], esi |
60 | mov [pg_data.mem_amount-OS_BASE], esi |
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61 | shr esi, 12 |
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62 | mov [pg_data.pages_count-OS_BASE], esi ; max number of PTEs ? |
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513 | serge | 63 | |
1683 | art_zh | 64 | shr edx, 12 |
65 | add edx, 31 |
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66 | and edx, not 31 |
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67 | shr edx, 3 |
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68 | mov [pg_data.pagemap_size-OS_BASE], edx ; size of sys_pgmap structure |
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465 | serge | 69 | |
1683 | art_zh | 70 | add edx, (sys_pgmap-OS_BASE)+4095 |
71 | and edx, not 4095 |
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72 | mov [tmp_page_tabs], edx ; free zone to build PTEs |
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465 | serge | 73 | |
1683 | art_zh | 74 | mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
75 | mov [pg_data.kernel_pages -OS_BASE], edx |
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76 | shr edx, 10 |
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77 | mov [pg_data.kernel_tables-OS_BASE], edx |
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465 | serge | 78 | |
1683 | art_zh | 79 | mov edx, (sys_pgdir-OS_BASE)+ 0x800 ; (0x800 = OS_BASE shr 20) |
465 | serge | 80 | |
1683 | art_zh | 81 | mov ebx, cr4 |
82 | or ebx, CR4_PSE |
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83 | mov eax, PG_LARGE+PG_SW |
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84 | mov cr4, ebx |
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85 | dec [pg_data.kernel_tables-OS_BASE] |
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465 | serge | 86 | |
1683 | art_zh | 87 | mov [edx], eax ; map first (physical) 4M bytes |
88 | add edx, 4 |
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465 | serge | 89 | |
1683 | art_zh | 90 | mov edi, [tmp_page_tabs] |
1952 | art_zh | 91 | mov ecx, [pg_data.kernel_pages -OS_BASE] ; safety cleaning of already-zeroed space |
92 | xor eax, eax |
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93 | rep stosd |
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1683 | art_zh | 94 | |
95 | mov ecx, [pg_data.kernel_tables-OS_BASE] ; build some PDEs to hold empty PTEs |
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96 | mov eax, [tmp_page_tabs] |
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97 | or eax, PG_SW |
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98 | mov edi, edx ; edi = sys_pgdir+0x804 |
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1952 | art_zh | 99 | |
465 | serge | 100 | .map_kernel_tabs: |
1683 | art_zh | 101 | stosd |
102 | add eax, 0x1000 |
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103 | dec ecx |
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104 | jnz .map_kernel_tabs |
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465 | serge | 105 | |
1683 | art_zh | 106 | ; map pagetables to linear space |
107 | mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE |
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465 | serge | 108 | |
1683 | art_zh | 109 | mov edi, (sys_pgdir-OS_BASE) |
110 | lea esi, [edi+(OS_BASE shr 20)] |
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111 | movsd |
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112 | movsd |
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113 | ret |
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465 | serge | 114 | endp |
115 | |||
116 | align 4 |
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117 | proc init_page_map |
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1103 | diamond | 118 | ; mark all memory as unavailable |
1683 | art_zh | 119 | mov edi, sys_pgmap-OS_BASE |
120 | mov ecx, [pg_data.pagemap_size-OS_BASE] |
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121 | shr ecx, 2 |
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122 | xor eax, eax |
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123 | cld |
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124 | rep stosd |
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465 | serge | 125 | |
1103 | diamond | 126 | ; scan through memory map and mark free areas as available |
1683 | art_zh | 127 | mov ebx, BOOT_VAR-OS_BASE + 0x9104 |
128 | mov edx, [ebx-4] |
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1103 | diamond | 129 | .scanmap: |
1683 | art_zh | 130 | mov ecx, [ebx+8] |
131 | shr ecx, 12 ; ecx = number of pages |
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132 | jz .next |
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133 | mov edi, [ebx] |
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134 | shr edi, 12 ; edi = first page |
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135 | mov eax, edi |
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136 | shr edi, 5 |
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137 | shl edi, 2 |
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138 | add edi, sys_pgmap-OS_BASE |
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139 | and eax, 31 |
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140 | jz .startok |
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141 | add ecx, eax |
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142 | sub ecx, 32 |
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143 | jbe .onedword |
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144 | push ecx |
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145 | mov ecx, eax |
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146 | or eax, -1 |
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147 | shl eax, cl |
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148 | or [edi], eax |
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149 | add edi, 4 |
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150 | pop ecx |
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1103 | diamond | 151 | .startok: |
1683 | art_zh | 152 | push ecx |
153 | shr ecx, 5 |
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154 | or eax, -1 |
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155 | rep stosd |
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156 | pop ecx |
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157 | and ecx, 31 |
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158 | neg eax |
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159 | shl eax, cl |
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160 | dec eax |
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161 | or [edi], eax |
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162 | jmp .next |
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1103 | diamond | 163 | .onedword: |
1683 | art_zh | 164 | add ecx, 32 |
165 | sub ecx, eax |
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1103 | diamond | 166 | @@: |
1683 | art_zh | 167 | bts [edi], eax |
168 | inc eax |
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169 | loop @b |
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1103 | diamond | 170 | .next: |
1683 | art_zh | 171 | add ebx, 20 |
172 | dec edx |
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173 | jnz .scanmap |
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1103 | diamond | 174 | |
175 | ; mark kernel memory as allocated (unavailable) |
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1683 | art_zh | 176 | mov ecx, [tmp_page_tabs] |
177 | mov edx, [pg_data.pages_count-OS_BASE] |
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178 | shr ecx, 12 |
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179 | add ecx, [pg_data.kernel_tables-OS_BASE] |
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180 | sub edx, ecx |
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181 | mov [pg_data.pages_free-OS_BASE], edx |
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465 | serge | 182 | |
1683 | art_zh | 183 | mov edi, sys_pgmap-OS_BASE |
184 | mov ebx, ecx |
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185 | shr ecx, 5 |
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186 | xor eax, eax |
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187 | rep stosd |
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465 | serge | 188 | |
1683 | art_zh | 189 | not eax |
190 | mov ecx, ebx |
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191 | and ecx, 31 |
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192 | shl eax, cl |
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193 | and [edi], eax |
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194 | add edi, OS_BASE |
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195 | mov [page_start-OS_BASE], edi; |
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465 | serge | 196 | |
1683 | art_zh | 197 | mov ebx, sys_pgmap |
198 | add ebx, [pg_data.pagemap_size-OS_BASE] |
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199 | mov [page_end-OS_BASE], ebx |
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465 | serge | 200 | |
1683 | art_zh | 201 | mov [pg_data.pg_mutex-OS_BASE], 0 |
202 | ret |
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465 | serge | 203 | endp |
204 | |||
205 | align 4 |
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586 | serge | 206 | |
207 | init_BIOS32: |
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1683 | art_zh | 208 | mov edi, 0xE0000 |
586 | serge | 209 | .pcibios_nxt: |
1683 | art_zh | 210 | cmp dword[edi], '_32_' ; "magic" word |
211 | je .BIOS32_found |
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586 | serge | 212 | .pcibios_nxt2: |
1683 | art_zh | 213 | add edi, 0x10 |
214 | cmp edi, 0xFFFF0 |
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215 | je .BIOS32_not_found |
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216 | jmp .pcibios_nxt |
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586 | serge | 217 | .BIOS32_found: ; magic word found, check control summ |
218 | |||
1683 | art_zh | 219 | movzx ecx, byte[edi + 9] |
220 | shl ecx, 4 |
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221 | mov esi, edi |
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222 | xor eax, eax |
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223 | cld ; paranoia |
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586 | serge | 224 | @@: lodsb |
1683 | art_zh | 225 | add ah, al |
226 | loop @b |
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227 | jnz .pcibios_nxt2 ; control summ must be zero |
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586 | serge | 228 | ; BIOS32 service found ! |
1683 | art_zh | 229 | mov ebp, [edi + 4] |
230 | mov [bios32_entry], ebp |
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586 | serge | 231 | ; check PCI BIOS present |
1683 | art_zh | 232 | mov eax, '$PCI' |
233 | xor ebx, ebx |
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234 | push cs ; special for 'ret far' from BIOS |
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235 | call ebp |
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236 | test al, al |
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237 | jnz .PCI_BIOS32_not_found |
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586 | serge | 238 | |
239 | ; здесь создаются дискрипторы для PCI BIOS |
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240 | |||
1683 | art_zh | 241 | add ebx, OS_BASE |
242 | dec ecx |
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243 | mov [(pci_code_32-OS_BASE)], cx ;limit 0-15 |
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244 | mov [(pci_data_32-OS_BASE)], cx ;limit 0-15 |
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586 | serge | 245 | |
1683 | art_zh | 246 | mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15 |
247 | mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15 |
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586 | serge | 248 | |
1683 | art_zh | 249 | shr ebx, 16 |
250 | mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23 |
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251 | mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23 |
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586 | serge | 252 | |
1683 | art_zh | 253 | shr ecx, 16 |
254 | and cl, 0x0F |
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255 | mov ch, bh |
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256 | add cx, D32 |
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257 | mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 & |
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258 | mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31 |
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586 | serge | 259 | |
1683 | art_zh | 260 | mov [(pci_bios_entry-OS_BASE)], edx |
261 | ; jmp .end |
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586 | serge | 262 | .PCI_BIOS32_not_found: |
263 | ; здесь должна заполнятся pci_emu_dat |
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264 | .BIOS32_not_found: |
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265 | .end: |
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1683 | art_zh | 266 | ret |
586 | serge | 267 | |
268 | align 4 |
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1683 | art_zh | 269 | test_cpu: ; only AMD machines supported |
465 | serge | 270 | |
1683 | art_zh | 271 | xor eax, eax |
272 | mov [cpu_caps-OS_BASE], eax |
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273 | mov [cpu_caps+4-OS_BASE], eax |
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465 | serge | 274 | |
1683 | art_zh | 275 | pushfd |
276 | pop eax |
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277 | mov ecx, eax |
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278 | xor eax, 0x40000 |
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279 | push eax |
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280 | popfd |
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281 | pushfd |
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282 | pop eax |
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283 | xor eax, ecx |
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284 | jz $ ; 386 |
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285 | push ecx |
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286 | popfd |
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465 | serge | 287 | |
1683 | art_zh | 288 | mov eax, ecx |
289 | xor eax, 0x200000 |
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290 | push eax |
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291 | popfd |
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292 | pushfd |
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293 | pop eax |
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294 | xor eax, ecx |
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295 | je $ ; 486 |
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465 | serge | 296 | |
1683 | art_zh | 297 | xor eax, eax |
298 | cpuid |
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465 | serge | 299 | |
1683 | art_zh | 300 | mov [cpu_vendor-OS_BASE], ebx |
301 | mov [cpu_vendor+4-OS_BASE], edx |
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302 | mov [cpu_vendor+8-OS_BASE], ecx |
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465 | serge | 303 | |
1683 | art_zh | 304 | cmp ebx, dword [AMD_str-OS_BASE] |
305 | jne $ |
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306 | cmp edx, dword [AMD_str+4-OS_BASE] |
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307 | jne $ |
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308 | cmp ecx, dword [AMD_str+8-OS_BASE] |
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309 | jne $ |
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310 | cmp eax, 1 |
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311 | jl $ |
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312 | mov eax, 1 |
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313 | cpuid |
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314 | mov [cpu_sign-OS_BASE], eax |
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315 | mov [cpu_info-OS_BASE], ebx |
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316 | mov [cpu_caps-OS_BASE], edx |
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317 | mov [cpu_caps+4-OS_BASE],ecx |
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318 | shr eax, 8 |
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319 | and eax, 0x0f |
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320 | ret |
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465 | serge | 321 |