Rev 9958 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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10051 | ace_dent | 3 | ;; Copyright (C) KolibriOS team 2004-2024. 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 | |||
9 | align 4 |
||
10 | proc mem_test |
||
11 | ; if we have BIOS with fn E820, skip the test |
||
8217 | dunkaist | 12 | cmp [BOOT_LO.memmap_block_cnt], 0 |
2288 | clevermous | 13 | jnz .ret |
14 | |||
15 | mov eax, cr0 |
||
9715 | Doczom | 16 | and eax, not (CR0_CD + CR0_NW) |
2288 | clevermous | 17 | or eax, CR0_CD ;disable caching |
18 | mov cr0, eax |
||
19 | wbinvd ;invalidate cache |
||
20 | |||
21 | xor edi, edi |
||
22 | mov ebx, 'TEST' |
||
23 | @@: |
||
24 | add edi, 0x100000 |
||
25 | xchg ebx, dword [edi] |
||
26 | cmp dword [edi], 'TEST' |
||
27 | xchg ebx, dword [edi] |
||
28 | je @b |
||
29 | |||
9715 | Doczom | 30 | and eax, not (CR0_CD + CR0_NW) ;enable caching |
2288 | clevermous | 31 | mov cr0, eax |
7132 | dunkaist | 32 | inc dword [BOOT_LO.memmap_block_cnt] |
2288 | clevermous | 33 | xor eax, eax |
9715 | Doczom | 34 | mov [BOOT_LO.memmap_blocks + e820entry.addr.lo], eax |
35 | mov [BOOT_LO.memmap_blocks + e820entry.addr.hi], eax |
||
36 | mov [BOOT_LO.memmap_blocks + e820entry.size.lo], edi |
||
37 | mov [BOOT_LO.memmap_blocks + e820entry.size.hi], eax |
||
4390 | clevermous | 38 | inc eax |
9715 | Doczom | 39 | mov [BOOT_LO.memmap_blocks + e820entry.type], eax |
2288 | clevermous | 40 | .ret: |
41 | ret |
||
42 | endp |
||
43 | |||
44 | align 4 |
||
45 | proc init_mem |
||
46 | ; calculate maximum allocatable address and number of allocatable pages |
||
7132 | dunkaist | 47 | mov edi, BOOT_LO.memmap_blocks |
8217 | dunkaist | 48 | mov ecx, [edi-4] ; memmap_block_cnt |
2288 | clevermous | 49 | xor esi, esi; esi will hold total amount of memory |
50 | xor edx, edx; edx will hold maximum allocatable address |
||
51 | .calcmax: |
||
52 | ; round all to pages |
||
9715 | Doczom | 53 | mov eax, [edi + e820entry.addr.lo] |
54 | cmp byte [edi + e820entry.type], 1 |
||
2466 | Serge | 55 | jne .unusable |
56 | |||
9899 | dunkaist | 57 | test eax, PAGE_SIZE-1 |
2288 | clevermous | 58 | jz @f |
59 | neg eax |
||
9899 | dunkaist | 60 | and eax, PAGE_SIZE-1 |
9715 | Doczom | 61 | add [edi + e820entry.addr.lo], eax |
62 | adc [edi + e820entry.addr.hi], 0 |
||
63 | sub [edi + e820entry.size.lo], eax |
||
64 | sbb [edi + e820entry.size.hi], 0 |
||
2288 | clevermous | 65 | jc .unusable |
66 | @@: |
||
9899 | dunkaist | 67 | and [edi + e820entry.size.lo], -PAGE_SIZE |
2288 | clevermous | 68 | jz .unusable |
8217 | dunkaist | 69 | ; ignore memory after 4 GiB |
9715 | Doczom | 70 | cmp [edi + e820entry.addr.hi], 0 |
2288 | clevermous | 71 | jnz .unusable |
9715 | Doczom | 72 | mov eax, [edi + e820entry.addr.lo] |
73 | cmp [edi + e820entry.size.hi], 0 |
||
2288 | clevermous | 74 | jnz .overflow |
9715 | Doczom | 75 | add eax, [edi + e820entry.size.lo] |
2288 | clevermous | 76 | jnc @f |
77 | .overflow: |
||
9899 | dunkaist | 78 | mov eax, -PAGE_SIZE |
2288 | clevermous | 79 | @@: |
80 | cmp edx, eax |
||
81 | jae @f |
||
82 | mov edx, eax |
||
83 | @@: |
||
9715 | Doczom | 84 | sub eax, [edi + e820entry.addr.lo] |
85 | mov [edi + e820entry.size.lo], eax |
||
2288 | clevermous | 86 | add esi, eax |
87 | jmp .usable |
||
88 | .unusable: |
||
8217 | dunkaist | 89 | ; and dword [edi+e820entry.size.lo], 0 |
2288 | clevermous | 90 | .usable: |
8217 | dunkaist | 91 | add edi, sizeof.e820entry |
2288 | clevermous | 92 | loop .calcmax |
93 | .calculated: |
||
9715 | Doczom | 94 | mov [MEM_AMOUNT - OS_BASE], esi |
95 | mov [pg_data.mem_amount - OS_BASE], esi |
||
2288 | clevermous | 96 | shr esi, 12 |
9715 | Doczom | 97 | mov [pg_data.pages_count - OS_BASE], esi |
2288 | clevermous | 98 | |
99 | shr edx, 12 |
||
100 | add edx, 31 |
||
101 | and edx, not 31 |
||
102 | shr edx, 3 |
||
9715 | Doczom | 103 | mov [pg_data.pagemap_size - OS_BASE], edx |
2288 | clevermous | 104 | |
9899 | dunkaist | 105 | add edx, (sys_pgmap - OS_BASE)+PAGE_SIZE-1 |
106 | and edx, -PAGE_SIZE |
||
2288 | clevermous | 107 | mov [tmp_page_tabs], edx |
108 | |||
109 | mov edx, esi |
||
110 | and edx, -1024 |
||
9899 | dunkaist | 111 | cmp edx, (OS_BASE/PAGE_SIZE) |
2288 | clevermous | 112 | jbe @F |
9899 | dunkaist | 113 | mov edx, (OS_BASE/PAGE_SIZE) |
2288 | clevermous | 114 | jmp .set |
115 | @@: |
||
9899 | dunkaist | 116 | cmp edx, (HEAP_BASE - OS_BASE + HEAP_MIN_SIZE)/PAGE_SIZE |
2288 | clevermous | 117 | jae .set |
9899 | dunkaist | 118 | mov edx, (HEAP_BASE - OS_BASE + HEAP_MIN_SIZE)/PAGE_SIZE |
2288 | clevermous | 119 | .set: |
9715 | Doczom | 120 | mov [pg_data.kernel_pages - OS_BASE], edx |
2288 | clevermous | 121 | shr edx, 10 |
9715 | Doczom | 122 | mov [pg_data.kernel_tables - OS_BASE], edx |
2288 | clevermous | 123 | |
124 | xor eax, eax |
||
9715 | Doczom | 125 | mov edi, sys_proc - OS_BASE |
9899 | dunkaist | 126 | mov ecx, 2*PAGE_SIZE/4 |
2288 | clevermous | 127 | cld |
128 | rep stosd |
||
129 | |||
9899 | dunkaist | 130 | mov edx, (sys_proc - OS_BASE + PROC.pdt_0) + (OS_BASE shr 20) |
9715 | Doczom | 131 | bt [cpu_caps - OS_BASE], CAPS_PSE |
2288 | clevermous | 132 | jnc .no_PSE |
133 | |||
134 | mov ebx, cr4 |
||
135 | or ebx, CR4_PSE |
||
9715 | Doczom | 136 | mov eax, PDE_LARGE + PG_SWR |
2288 | clevermous | 137 | mov cr4, ebx |
9715 | Doczom | 138 | dec [pg_data.kernel_tables - OS_BASE] |
2288 | clevermous | 139 | |
140 | mov [edx], eax |
||
141 | add edx, 4 |
||
142 | |||
143 | mov edi, [tmp_page_tabs] |
||
144 | jmp .map_kernel_heap ; new kernel fits to the first 4Mb - nothing to do with ".map_low" |
||
145 | .no_PSE: |
||
5356 | serge | 146 | mov eax, PG_SWR |
2288 | clevermous | 147 | mov ecx, [tmp_page_tabs] |
148 | shr ecx, 12 |
||
149 | .map_low: |
||
150 | mov edi, [tmp_page_tabs] |
||
151 | @@: ; |
||
152 | stosd |
||
9899 | dunkaist | 153 | add eax, PAGE_SIZE |
2288 | clevermous | 154 | dec ecx |
155 | jnz @B |
||
156 | |||
157 | .map_kernel_heap: |
||
9715 | Doczom | 158 | mov ecx, [pg_data.kernel_tables - OS_BASE] |
2288 | clevermous | 159 | shl ecx, 10 |
160 | xor eax, eax |
||
161 | rep stosd |
||
162 | |||
9715 | Doczom | 163 | mov ecx, [pg_data.kernel_tables - OS_BASE] |
2288 | clevermous | 164 | mov eax, [tmp_page_tabs] |
5356 | serge | 165 | or eax, PG_SWR |
2288 | clevermous | 166 | mov edi, edx |
167 | |||
168 | .map_kernel_tabs: |
||
169 | stosd |
||
9899 | dunkaist | 170 | add eax, PAGE_SIZE |
2288 | clevermous | 171 | dec ecx |
172 | jnz .map_kernel_tabs |
||
173 | |||
5356 | serge | 174 | mov dword [sys_proc-OS_BASE+PROC.pdt_0+(page_tabs shr 20)], sys_proc+PROC.pdt_0+PG_SWR-OS_BASE |
2288 | clevermous | 175 | |
9715 | Doczom | 176 | mov edi, (sys_proc + PROC.pdt_0 - OS_BASE) |
177 | lea esi, [edi + (OS_BASE shr 20)] |
||
2288 | clevermous | 178 | movsd |
179 | movsd |
||
180 | ret |
||
181 | endp |
||
182 | |||
183 | align 4 |
||
184 | proc init_page_map |
||
185 | ; mark all memory as unavailable |
||
9715 | Doczom | 186 | mov edi, sys_pgmap - OS_BASE |
187 | mov ecx, [pg_data.pagemap_size - OS_BASE] |
||
2288 | clevermous | 188 | shr ecx, 2 |
189 | xor eax, eax |
||
190 | cld |
||
191 | rep stosd |
||
192 | |||
193 | ; scan through memory map and mark free areas as available |
||
7132 | dunkaist | 194 | mov ebx, BOOT_LO.memmap_blocks |
2288 | clevermous | 195 | mov edx, [ebx-4] |
196 | .scanmap: |
||
9715 | Doczom | 197 | cmp byte [ebx + e820entry.type], 1 |
2466 | Serge | 198 | jne .next |
199 | |||
9715 | Doczom | 200 | mov ecx, [ebx + e820entry.size.lo] |
2288 | clevermous | 201 | shr ecx, 12; ecx = number of pages |
202 | jz .next |
||
9715 | Doczom | 203 | mov edi, [ebx + e820entry.addr.lo] |
2288 | clevermous | 204 | shr edi, 12; edi = first page |
205 | mov eax, edi |
||
206 | shr edi, 5 |
||
207 | shl edi, 2 |
||
9715 | Doczom | 208 | add edi, sys_pgmap - OS_BASE |
2288 | clevermous | 209 | and eax, 31 |
210 | jz .startok |
||
211 | add ecx, eax |
||
212 | sub ecx, 32 |
||
213 | jbe .onedword |
||
214 | push ecx |
||
215 | mov ecx, eax |
||
216 | or eax, -1 |
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217 | shl eax, cl |
||
218 | or [edi], eax |
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219 | add edi, 4 |
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220 | pop ecx |
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221 | .startok: |
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222 | push ecx |
||
223 | shr ecx, 5 |
||
224 | or eax, -1 |
||
225 | rep stosd |
||
226 | pop ecx |
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227 | and ecx, 31 |
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228 | neg eax |
||
229 | shl eax, cl |
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230 | dec eax |
||
231 | or [edi], eax |
||
232 | jmp .next |
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233 | .onedword: |
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234 | add ecx, 32 |
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235 | sub ecx, eax |
||
236 | @@: |
||
237 | bts [edi], eax |
||
238 | inc eax |
||
239 | loop @b |
||
240 | .next: |
||
8217 | dunkaist | 241 | add ebx, sizeof.e820entry |
2288 | clevermous | 242 | dec edx |
243 | jnz .scanmap |
||
244 | |||
245 | ; mark kernel memory as allocated (unavailable) |
||
246 | mov ecx, [tmp_page_tabs] |
||
9715 | Doczom | 247 | mov edx, [pg_data.pages_count - OS_BASE] |
2288 | clevermous | 248 | shr ecx, 12 |
9715 | Doczom | 249 | add ecx, [pg_data.kernel_tables - OS_BASE] |
2288 | clevermous | 250 | sub edx, ecx |
9715 | Doczom | 251 | mov [pg_data.pages_free - OS_BASE], edx |
2288 | clevermous | 252 | |
9715 | Doczom | 253 | mov edi, sys_pgmap - OS_BASE |
2288 | clevermous | 254 | mov ebx, ecx |
255 | shr ecx, 5 |
||
256 | xor eax, eax |
||
257 | rep stosd |
||
258 | |||
259 | not eax |
||
260 | mov ecx, ebx |
||
261 | and ecx, 31 |
||
262 | shl eax, cl |
||
263 | and [edi], eax |
||
264 | add edi, OS_BASE |
||
9715 | Doczom | 265 | mov [page_start - OS_BASE], edi; |
2288 | clevermous | 266 | |
267 | mov ebx, sys_pgmap |
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9715 | Doczom | 268 | add ebx, [pg_data.pagemap_size - OS_BASE] |
269 | mov [page_end - OS_BASE], ebx |
||
2288 | clevermous | 270 | |
271 | ret |
||
272 | endp |
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273 | |||
274 | align 4 |
||
275 | |||
276 | init_BIOS32: |
||
277 | mov edi, 0xE0000 |
||
278 | .pcibios_nxt: |
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279 | cmp dword[edi], '_32_'; "magic" word |
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280 | je .BIOS32_found |
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281 | .pcibios_nxt2: |
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282 | add edi, 0x10 |
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283 | cmp edi, 0xFFFF0 |
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284 | je .BIOS32_not_found |
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285 | jmp .pcibios_nxt |
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286 | .BIOS32_found: ; magic word found, check control summ |
||
287 | |||
288 | movzx ecx, byte[edi + 9] |
||
289 | shl ecx, 4 |
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290 | mov esi, edi |
||
291 | xor eax, eax |
||
292 | cld ; paranoia |
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293 | @@: |
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294 | lodsb |
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295 | add ah, al |
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296 | loop @b |
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297 | jnz .pcibios_nxt2; control summ must be zero |
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298 | ; BIOS32 service found ! |
||
299 | mov ebp, [edi + 4] |
||
300 | mov [bios32_entry], ebp |
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301 | ; check PCI BIOS present |
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302 | mov eax, '$PCI' |
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303 | xor ebx, ebx |
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304 | push cs ; special for 'ret far' from BIOS |
||
305 | call ebp |
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306 | test al, al |
||
307 | jnz .PCI_BIOS32_not_found |
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308 | |||
8052 | rgimad | 309 | ; descriptors for PCI BIOS are created here |
2288 | clevermous | 310 | |
311 | add ebx, OS_BASE |
||
312 | dec ecx |
||
9715 | Doczom | 313 | mov [(pci_code_32 - OS_BASE)], cx ;limit 0-15 |
314 | mov [(pci_data_32 - OS_BASE)], cx ;limit 0-15 |
||
2288 | clevermous | 315 | |
9715 | Doczom | 316 | mov [(pci_code_32 - OS_BASE)+2], bx ;base 0-15 |
317 | mov [(pci_data_32 - OS_BASE)+2], bx ;base 0-15 |
||
2288 | clevermous | 318 | |
319 | shr ebx, 16 |
||
9715 | Doczom | 320 | mov [(pci_code_32 - OS_BASE)+4], bl ;base 16-23 |
321 | mov [(pci_data_32 - OS_BASE)+4], bl ;base 16-23 |
||
2288 | clevermous | 322 | |
323 | shr ecx, 16 |
||
324 | and cl, 0x0F |
||
325 | mov ch, bh |
||
326 | add cx, D32 |
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9715 | Doczom | 327 | mov [(pci_code_32 - OS_BASE)+6], cx ;lim 16-19 & |
328 | mov [(pci_data_32 - OS_BASE)+6], cx ;base 24-31 |
||
2288 | clevermous | 329 | |
9715 | Doczom | 330 | mov [(pci_bios_entry - OS_BASE)], edx |
2288 | clevermous | 331 | ; jmp .end |
332 | .PCI_BIOS32_not_found: |
||
8052 | rgimad | 333 | ; pci_emu_dat structure should be filled here |
2288 | clevermous | 334 | .BIOS32_not_found: |
335 | .end: |
||
336 | ret |
||
337 | |||
338 | align 4 |
||
339 | proc test_cpu |
||
340 | locals |
||
341 | cpu_type dd ? |
||
342 | endl |
||
343 | |||
344 | xor eax, eax |
||
345 | mov [cpu_type], eax |
||
9715 | Doczom | 346 | mov [cpu_caps - OS_BASE], eax |
347 | mov [cpu_caps + 4 - OS_BASE], eax |
||
348 | mov [cpu_phys_addr_width - OS_BASE], 32 |
||
2288 | clevermous | 349 | |
350 | pushfd |
||
351 | pop eax |
||
352 | mov ecx, eax |
||
7126 | dunkaist | 353 | xor eax, EFLAGS_AC |
2288 | clevermous | 354 | push eax |
355 | popfd |
||
356 | pushfd |
||
357 | pop eax |
||
358 | xor eax, ecx |
||
359 | mov [cpu_type], CPU_386 |
||
360 | jz .end_cpuid |
||
361 | push ecx |
||
362 | popfd |
||
363 | |||
364 | mov [cpu_type], CPU_486 |
||
365 | mov eax, ecx |
||
7126 | dunkaist | 366 | xor eax, EFLAGS_ID |
2288 | clevermous | 367 | push eax |
368 | popfd |
||
369 | pushfd |
||
370 | pop eax |
||
371 | xor eax, ecx |
||
372 | je .end_cpuid |
||
373 | |||
374 | xor eax, eax |
||
375 | cpuid |
||
376 | |||
9715 | Doczom | 377 | mov [cpu_vendor - OS_BASE], ebx |
378 | mov [cpu_vendor + 4 - OS_BASE], edx |
||
379 | mov [cpu_vendor + 8 - OS_BASE], ecx |
||
4593 | clevermous | 380 | |
2288 | clevermous | 381 | cmp eax, 1 |
382 | jl .end_cpuid |
||
383 | mov eax, 1 |
||
384 | cpuid |
||
9715 | Doczom | 385 | mov [cpu_sign - OS_BASE], eax |
386 | mov [cpu_info - OS_BASE], ebx |
||
387 | mov [cpu_caps - OS_BASE], edx |
||
388 | mov [cpu_caps + 4 - OS_BASE], ecx |
||
2288 | clevermous | 389 | |
4593 | clevermous | 390 | bt edx, CAPS_PAE |
391 | jnc @f |
||
9715 | Doczom | 392 | mov [cpu_phys_addr_width - OS_BASE], 36 |
4593 | clevermous | 393 | @@: |
394 | mov eax, 0x80000000 |
||
395 | cpuid |
||
396 | cmp eax, 0x80000008 |
||
397 | jb @f |
||
398 | mov eax, 0x80000008 |
||
399 | cpuid |
||
9715 | Doczom | 400 | mov [cpu_phys_addr_width - OS_BASE], al |
4593 | clevermous | 401 | @@: |
402 | |||
9715 | Doczom | 403 | mov eax, [cpu_sign - OS_BASE] |
2288 | clevermous | 404 | shr eax, 8 |
405 | and eax, 0x0f |
||
406 | ret |
||
407 | .end_cpuid: |
||
408 | mov eax, [cpu_type] |
||
409 | ret |
||
410 | endp |
||
411 | |||
7136 | dunkaist | 412 | ACPI_RSDP_CHECKSUM_LENGTH = 20 |
5787 | serge | 413 | |
8111 | dunkaist | 414 | proc acpi_locate_tables uses ebx esi edi |
9715 | Doczom | 415 | mov ebx, [ebx + ACPI_RSDP.RsdtAddress] |
416 | mov [acpi_rsdt_base - OS_BASE], ebx |
||
417 | mov eax, [ebx + ACPI_RSDT.Length] |
||
418 | mov [acpi_rsdt_size - OS_BASE], eax |
||
2288 | clevermous | 419 | |
9715 | Doczom | 420 | mov esi, [acpi_rsdt_base - OS_BASE] |
421 | mov ecx, [esi + ACPI_RSDT.Length] |
||
422 | lea edi, [esi + ecx] |
||
8111 | dunkaist | 423 | add esi, sizeof.ACPI_TABLE |
424 | movi ecx, 1 |
||
425 | .next_table: |
||
426 | cmp esi, edi |
||
427 | jae .done |
||
428 | lodsd |
||
429 | cmp [eax+ACPI_TABLE.Signature], 'SSDT' ; skip DSDT if present |
||
430 | jz .ssdt ; read it from FADT |
||
431 | cmp [eax+ACPI_TABLE.Signature], 'FACP' ; this is FADT |
||
432 | jz .fadt |
||
433 | cmp [eax+ACPI_TABLE.Signature], 'APIC' ; this is MADT |
||
434 | jz .madt |
||
435 | cmp [eax+ACPI_TABLE.Signature], 'HPET' |
||
436 | jz .hpet |
||
437 | jmp .next_table |
||
438 | .ssdt: |
||
9715 | Doczom | 439 | mov [acpi_ssdt_base + ecx*4 - OS_BASE], eax |
8111 | dunkaist | 440 | mov eax, [eax+ACPI_TABLE.Length] |
9715 | Doczom | 441 | mov [acpi_ssdt_size + ecx*4 - OS_BASE], eax |
8111 | dunkaist | 442 | inc ecx |
443 | jmp .next_table |
||
444 | .fadt: |
||
9715 | Doczom | 445 | mov [acpi_fadt_base - OS_BASE], eax |
446 | cmp [eax + ACPI_FADT.DSDT], 0 |
||
8111 | dunkaist | 447 | jz @f |
9715 | Doczom | 448 | mov edx, [eax + ACPI_FADT.DSDT] |
449 | mov [acpi_ssdt_base - OS_BASE], edx |
||
450 | mov edx, [edx + ACPI_TABLE.Length] |
||
451 | mov [acpi_ssdt_size - OS_BASE], edx |
||
8111 | dunkaist | 452 | @@: |
9715 | Doczom | 453 | mov eax, [eax + ACPI_TABLE.Length] |
454 | mov [acpi_fadt_size - OS_BASE], eax |
||
8111 | dunkaist | 455 | jmp .next_table |
456 | .madt: |
||
9715 | Doczom | 457 | mov [acpi_madt_base - OS_BASE], eax |
458 | mov eax, [eax + ACPI_TABLE.Length] |
||
459 | mov [acpi_madt_size - OS_BASE], eax |
||
8111 | dunkaist | 460 | jmp .next_table |
461 | .hpet: |
||
9715 | Doczom | 462 | mov [acpi_hpet_base - OS_BASE], eax |
463 | mov eax, [eax + ACPI_TABLE.Length] |
||
464 | mov [acpi_hpet_size - OS_BASE], eax |
||
8111 | dunkaist | 465 | jmp .next_table |
466 | .done: |
||
9715 | Doczom | 467 | mov [acpi_ssdt_cnt - OS_BASE], ecx |
8111 | dunkaist | 468 | ret |
469 | endp |
||
2288 | clevermous | 470 | |
471 | acpi_locate: |
||
472 | push ebx |
||
6244 | serge | 473 | push edi |
474 | |||
7132 | dunkaist | 475 | mov ebx, [BOOT_LO.acpi_rsdp] |
7130 | dunkaist | 476 | test ebx, ebx |
477 | jz .done |
||
9958 | dunkaist | 478 | mov edi, ebx |
7130 | dunkaist | 479 | call .check |
6244 | serge | 480 | .done: |
9715 | Doczom | 481 | mov [acpi_rsdp_base - OS_BASE], ebx |
8111 | dunkaist | 482 | test ebx, ebx |
483 | jz @f |
||
484 | call acpi_locate_tables |
||
485 | @@: |
||
6244 | serge | 486 | pop edi |
487 | pop ebx |
||
488 | ret |
||
489 | |||
2288 | clevermous | 490 | .check: |
7122 | dunkaist | 491 | cmp [ebx], dword 'RSD ' |
2288 | clevermous | 492 | jne .next |
7122 | dunkaist | 493 | cmp [ebx+4], dword 'PTR ' |
2288 | clevermous | 494 | jne .next |
495 | |||
496 | mov edx, ebx |
||
497 | mov ecx, ACPI_RSDP_CHECKSUM_LENGTH |
||
498 | xor eax, eax |
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499 | .sum: |
||
500 | add al, [edx] |
||
501 | inc edx |
||
502 | loop .sum |
||
503 | |||
504 | test al, al |
||
505 | jnz .next |
||
506 | ret |
||
507 | .next: |
||
508 | add ebx, 16 |
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6244 | serge | 509 | cmp ebx, edi |
2288 | clevermous | 510 | jb .check |
6244 | serge | 511 | xor ebx, ebx |
2288 | clevermous | 512 | ret |