Rev 3195 | Details | Compare with Previous | Last modification | View Log | RSS feed
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: 3526 $ |
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 |
3195 | art_zh | 21 | movd xmm0, eax ; load 128-bit Zero |
22 | |||
2047 | art_zh | 23 | mov edi,CLEAN_ZONE ; 0x280000 = ramdisk FAT ? |
3195 | art_zh | 24 | ; mov ecx,(HEAP_BASE-OS_BASE-CLEAN_ZONE) / 16 |
1683 | art_zh | 25 | cld |
3195 | art_zh | 26 | .1: |
27 | movups [edi],xmm0 |
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28 | add edi, 16 |
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29 | cmp edi, (HEAP_BASE-OS_BASE) |
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30 | jb .1 |
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1683 | art_zh | 31 | |
3195 | art_zh | 32 | |
33 | ; clear [0x50000..0x90000] |
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1683 | art_zh | 34 | mov edi,0x50000 ; 0x50000 is somewhere inside kernel code? |
3195 | art_zh | 35 | .2: |
36 | movups [edi],xmm0 |
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37 | add edi, 16 |
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38 | cmp edi, 0x90000 |
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39 | jb .2 |
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1683 | art_zh | 40 | |
41 | ; clear undefined kernel globals |
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42 | mov edi, endofcode-OS_BASE |
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43 | mov ecx, (uglobals_size/4)+4 |
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44 | rep stosd |
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45 | |||
46 | ; save [0..0xffff] |
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47 | xor esi, esi |
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2047 | art_zh | 48 | mov edi, (BOOT_VAR - OS_BASE) ; low mem storage area |
1683 | art_zh | 49 | mov ecx, 0x10000 / 4 |
50 | rep movsd |
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51 | ; clear [0x1000..0x0ffff] |
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52 | mov edi,0x1000 |
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53 | mov ecx,0xf000 / 4 |
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54 | rep stosd |
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55 | |||
56 | ; clear |
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3526 | art_zh | 57 | mov edi, mmio_pte |
58 | mov ecx, 2048 ; 8k (sys_pgdir included) |
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1683 | art_zh | 59 | rep stosd |
60 | ret |
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61 | |||
62 | ; ====================================================================== |
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465 | serge | 63 | align 4 |
64 | |||
2425 | art_zh | 65 | init_mem: |
2047 | art_zh | 66 | mov ecx, 0xC001001A ; Top of Memory MSR |
67 | xor edi, edi |
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68 | rdmsr |
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69 | mov esi, eax ; esi = total amount of memory |
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70 | mov ecx, 0x0200 |
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71 | .read_mtrr: |
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72 | rdmsr |
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73 | and eax, 0xFFF00000 ; not just bitcleaning |
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74 | jz .next_mtrr ; ignore the main memory and free MTRRs |
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75 | cmp esi, eax |
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76 | jb .next_mtrr ; ignore MMIO blocks |
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77 | mov esi, eax |
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78 | .next_mtrr: |
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79 | add cl, 2 |
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80 | cmp cl, 0x10 |
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81 | jb .read_mtrr |
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82 | |||
83 | mov eax, USER_DMA_SIZE |
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84 | sub esi, eax ; exclude the Global DMA block... |
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85 | and esi, 0xFF800000 ; ...and the hole above it |
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86 | mov eax, esi |
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87 | mov [MEM_AMOUNT-OS_BASE], eax |
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88 | mov [pg_data.mem_amount-OS_BASE], eax ; the true MEMTOP |
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89 | mov [UserDMAaddr-OS_BASE], eax |
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90 | |||
1683 | art_zh | 91 | shr esi, 12 |
92 | mov [pg_data.pages_count-OS_BASE], esi ; max number of PTEs ? |
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513 | serge | 93 | |
2350 | art_zh | 94 | mov edx, esi ; edx will hold maximum allocatable address |
1683 | art_zh | 95 | shr edx, 3 |
96 | mov [pg_data.pagemap_size-OS_BASE], edx ; size of sys_pgmap structure |
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465 | serge | 97 | |
1683 | art_zh | 98 | add edx, (sys_pgmap-OS_BASE)+4095 |
99 | and edx, not 4095 |
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2350 | art_zh | 100 | mov [tmp_page_tabs], edx ; free zone to build PTEs for all available memory |
465 | serge | 101 | |
1683 | art_zh | 102 | mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
103 | mov [pg_data.kernel_pages -OS_BASE], edx |
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104 | shr edx, 10 |
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2350 | art_zh | 105 | mov [pg_data.kernel_tables-OS_BASE], edx ; number of Kernel PDEs needed |
465 | serge | 106 | |
1683 | art_zh | 107 | mov edx, (sys_pgdir-OS_BASE)+ 0x800 ; (0x800 = OS_BASE shr 20) |
465 | serge | 108 | |
1683 | art_zh | 109 | mov ebx, cr4 |
110 | or ebx, CR4_PSE |
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111 | mov eax, PG_LARGE+PG_SW |
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112 | mov cr4, ebx |
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113 | dec [pg_data.kernel_tables-OS_BASE] |
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465 | serge | 114 | |
1683 | art_zh | 115 | mov [edx], eax ; map first (physical) 4M bytes |
116 | add edx, 4 |
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465 | serge | 117 | |
1683 | art_zh | 118 | mov edi, [tmp_page_tabs] |
1952 | art_zh | 119 | mov ecx, [pg_data.kernel_pages -OS_BASE] ; safety cleaning of already-zeroed space |
120 | xor eax, eax |
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121 | rep stosd |
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1683 | art_zh | 122 | |
123 | mov ecx, [pg_data.kernel_tables-OS_BASE] ; build some PDEs to hold empty PTEs |
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124 | mov eax, [tmp_page_tabs] |
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125 | or eax, PG_SW |
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126 | mov edi, edx ; edi = sys_pgdir+0x804 |
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1952 | art_zh | 127 | |
465 | serge | 128 | .map_kernel_tabs: |
1683 | art_zh | 129 | stosd |
130 | add eax, 0x1000 |
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131 | dec ecx |
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132 | jnz .map_kernel_tabs |
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465 | serge | 133 | |
3168 | art_zh | 134 | ; map pagetables to linear space! |
1683 | art_zh | 135 | mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE |
465 | serge | 136 | |
1683 | art_zh | 137 | mov edi, (sys_pgdir-OS_BASE) |
138 | lea esi, [edi+(OS_BASE shr 20)] |
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139 | movsd |
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140 | movsd |
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465 | serge | 141 | |
2425 | art_zh | 142 | init_page_map: |
2350 | art_zh | 143 | ; mark all memory as available |
1683 | art_zh | 144 | mov edi, sys_pgmap-OS_BASE |
145 | mov ecx, [pg_data.pagemap_size-OS_BASE] |
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146 | shr ecx, 2 |
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2350 | art_zh | 147 | mov eax, -1 |
1683 | art_zh | 148 | cld |
149 | rep stosd |
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465 | serge | 150 | |
1103 | diamond | 151 | |
152 | ; mark kernel memory as allocated (unavailable) |
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1683 | art_zh | 153 | mov ecx, [tmp_page_tabs] |
154 | mov edx, [pg_data.pages_count-OS_BASE] |
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155 | shr ecx, 12 |
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156 | add ecx, [pg_data.kernel_tables-OS_BASE] |
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157 | sub edx, ecx |
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158 | mov [pg_data.pages_free-OS_BASE], edx |
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465 | serge | 159 | |
1683 | art_zh | 160 | mov edi, sys_pgmap-OS_BASE |
161 | mov ebx, ecx |
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3195 | art_zh | 162 | shr ecx, 5 ; 32 pagebits per dw |
1683 | art_zh | 163 | xor eax, eax |
164 | rep stosd |
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465 | serge | 165 | |
1683 | art_zh | 166 | not eax |
167 | mov ecx, ebx |
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168 | and ecx, 31 |
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169 | shl eax, cl |
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170 | and [edi], eax |
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171 | add edi, OS_BASE |
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172 | mov [page_start-OS_BASE], edi; |
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465 | serge | 173 | |
1683 | art_zh | 174 | mov ebx, sys_pgmap |
175 | add ebx, [pg_data.pagemap_size-OS_BASE] |
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176 | mov [page_end-OS_BASE], ebx |
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465 | serge | 177 | |
1683 | art_zh | 178 | mov [pg_data.pg_mutex-OS_BASE], 0 |
179 | ret |
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465 | serge | 180 | |
2425 | art_zh | 181 | |
465 | serge | 182 | align 4 |
586 | serge | 183 | |
184 | init_BIOS32: |
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1683 | art_zh | 185 | mov edi, 0xE0000 |
586 | serge | 186 | .pcibios_nxt: |
1683 | art_zh | 187 | cmp dword[edi], '_32_' ; "magic" word |
188 | je .BIOS32_found |
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586 | serge | 189 | .pcibios_nxt2: |
1683 | art_zh | 190 | add edi, 0x10 |
191 | cmp edi, 0xFFFF0 |
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192 | je .BIOS32_not_found |
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193 | jmp .pcibios_nxt |
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586 | serge | 194 | .BIOS32_found: ; magic word found, check control summ |
195 | |||
1683 | art_zh | 196 | movzx ecx, byte[edi + 9] |
197 | shl ecx, 4 |
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198 | mov esi, edi |
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199 | xor eax, eax |
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200 | cld ; paranoia |
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586 | serge | 201 | @@: lodsb |
1683 | art_zh | 202 | add ah, al |
203 | loop @b |
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204 | jnz .pcibios_nxt2 ; control summ must be zero |
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586 | serge | 205 | ; BIOS32 service found ! |
1683 | art_zh | 206 | mov ebp, [edi + 4] |
207 | mov [bios32_entry], ebp |
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586 | serge | 208 | ; check PCI BIOS present |
1683 | art_zh | 209 | mov eax, '$PCI' |
210 | xor ebx, ebx |
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211 | push cs ; special for 'ret far' from BIOS |
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212 | call ebp |
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213 | test al, al |
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214 | jnz .PCI_BIOS32_not_found |
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586 | serge | 215 | |
216 | ; здесь создаются дискрипторы для PCI BIOS |
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217 | |||
1683 | art_zh | 218 | add ebx, OS_BASE |
219 | dec ecx |
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220 | mov [(pci_code_32-OS_BASE)], cx ;limit 0-15 |
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221 | mov [(pci_data_32-OS_BASE)], cx ;limit 0-15 |
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586 | serge | 222 | |
1683 | art_zh | 223 | mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15 |
224 | mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15 |
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586 | serge | 225 | |
1683 | art_zh | 226 | shr ebx, 16 |
227 | mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23 |
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228 | mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23 |
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586 | serge | 229 | |
1683 | art_zh | 230 | shr ecx, 16 |
231 | and cl, 0x0F |
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232 | mov ch, bh |
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233 | add cx, D32 |
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234 | mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 & |
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235 | mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31 |
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586 | serge | 236 | |
1683 | art_zh | 237 | mov [(pci_bios_entry-OS_BASE)], edx |
238 | ; jmp .end |
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586 | serge | 239 | .PCI_BIOS32_not_found: |
240 | ; здесь должна заполнятся pci_emu_dat |
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241 | .BIOS32_not_found: |
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242 | .end: |
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1683 | art_zh | 243 | ret |
586 | serge | 244 | |
245 | align 4 |
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1683 | art_zh | 246 | test_cpu: ; only AMD machines supported |
465 | serge | 247 | |
1683 | art_zh | 248 | xor eax, eax |
249 | mov [cpu_caps-OS_BASE], eax |
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250 | mov [cpu_caps+4-OS_BASE], eax |
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465 | serge | 251 | |
1683 | art_zh | 252 | pushfd |
253 | pop eax |
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254 | mov ecx, eax |
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255 | xor eax, 0x40000 |
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256 | push eax |
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257 | popfd |
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258 | pushfd |
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259 | pop eax |
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260 | xor eax, ecx |
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261 | jz $ ; 386 |
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262 | push ecx |
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263 | popfd |
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465 | serge | 264 | |
1683 | art_zh | 265 | mov eax, ecx |
266 | xor eax, 0x200000 |
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267 | push eax |
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268 | popfd |
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269 | pushfd |
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270 | pop eax |
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271 | xor eax, ecx |
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272 | je $ ; 486 |
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465 | serge | 273 | |
1683 | art_zh | 274 | xor eax, eax |
275 | cpuid |
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465 | serge | 276 | |
1683 | art_zh | 277 | mov [cpu_vendor-OS_BASE], ebx |
278 | mov [cpu_vendor+4-OS_BASE], edx |
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279 | mov [cpu_vendor+8-OS_BASE], ecx |
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465 | serge | 280 | |
1683 | art_zh | 281 | cmp ebx, dword [AMD_str-OS_BASE] |
282 | jne $ |
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283 | cmp edx, dword [AMD_str+4-OS_BASE] |
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284 | jne $ |
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285 | cmp ecx, dword [AMD_str+8-OS_BASE] |
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286 | jne $ |
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287 | cmp eax, 1 |
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288 | jl $ |
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289 | mov eax, 1 |
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290 | cpuid |
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291 | mov [cpu_sign-OS_BASE], eax |
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292 | mov [cpu_info-OS_BASE], ebx |
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293 | mov [cpu_caps-OS_BASE], edx |
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294 | mov [cpu_caps+4-OS_BASE],ecx |
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295 | shr eax, 8 |
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296 | and eax, 0x0f |
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297 | ret |
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465 | serge | 298 |