Rev 256 | Rev 346 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
161 | diamond | 1 | ; Low-level driver for HDD access |
2 | ; DMA support by Mario79 |
||
160 | diamond | 3 | |
4 | ;************************************************************************** |
||
5 | ; |
||
6 | ; 0x600008 - first entry in cache list |
||
7 | ; |
||
8 | ; +0 - lba sector |
||
9 | ; +4 - state of cache sector |
||
10 | ; 0 = empty |
||
11 | ; 1 = used for read ( same as in hd ) |
||
12 | ; 2 = used for write ( differs from hd ) |
||
13 | ; |
||
14 | ; +65536 - cache entries |
||
15 | ; |
||
16 | ;************************************************************************** |
||
17 | |||
18 | align 4 |
||
19 | hd_read: |
||
20 | ;----------------------------------------------------------- |
||
21 | ; input : eax = block to read |
||
22 | ; ebx = destination |
||
23 | ;----------------------------------------------------------- |
||
256 | diamond | 24 | and [hd_error], 0 |
160 | diamond | 25 | push ecx esi edi ; scan cache |
26 | |||
27 | mov ecx,cache_max ; entries in cache |
||
28 | mov esi,0x600000+8 |
||
29 | mov edi,1 |
||
30 | |||
31 | hdreadcache: |
||
32 | |||
33 | cmp dword [esi+4],0 ; empty |
||
34 | je nohdcache |
||
35 | |||
36 | cmp [esi],eax ; correct sector |
||
37 | je yeshdcache |
||
38 | |||
39 | nohdcache: |
||
40 | |||
41 | add esi,8 |
||
42 | inc edi |
||
43 | dec ecx |
||
44 | jnz hdreadcache |
||
45 | |||
46 | call find_empty_slot ; ret in edi |
||
47 | cmp [hd_error],0 |
||
48 | jne return_01 |
||
49 | cmp [dma_hdd], 1 |
||
50 | jnz .nodma |
||
51 | call hd_read_dma |
||
52 | jmp @f |
||
53 | .nodma: |
||
54 | call hd_read_pio |
||
55 | @@: |
||
56 | |||
57 | lea esi,[edi*8+0x600000] |
||
58 | mov [esi],eax ; sector number |
||
59 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
||
60 | |||
61 | yeshdcache: |
||
62 | |||
63 | mov esi,edi |
||
64 | shl esi,9 |
||
65 | add esi,0x600000+65536 |
||
66 | mov edi,ebx |
||
67 | mov ecx,512/4 |
||
68 | cld |
||
69 | rep movsd ; move data |
||
70 | return_01: |
||
71 | pop edi esi ecx |
||
72 | ret |
||
73 | |||
74 | align 4 |
||
75 | hd_read_pio: |
||
76 | push eax edx |
||
77 | |||
78 | call wait_for_hd_idle |
||
79 | cmp [hd_error],0 |
||
80 | jne hd_read_error |
||
81 | |||
321 | diamond | 82 | cli |
160 | diamond | 83 | xor eax,eax |
84 | mov edx,[hdbase] |
||
85 | inc edx |
||
86 | out dx,al ; ATAFeatures регистр "особенностей" |
||
87 | inc edx |
||
88 | inc eax |
||
89 | out dx,al ; ATASectorCount счётчик секторов |
||
90 | inc edx |
||
91 | mov eax,[esp+4] |
||
92 | out dx,al ; ATASectorNumber регистр номера сектора |
||
93 | shr eax,8 |
||
94 | inc edx |
||
95 | out dx,al ; ATACylinder номер цилиндра (младший байт) |
||
96 | shr eax,8 |
||
97 | inc edx |
||
98 | out dx,al ; номер цилиндра (старший байт) |
||
99 | shr eax,8 |
||
100 | inc edx |
||
101 | and al,1+2+4+8 |
||
102 | add al,byte [hdid] |
||
103 | add al,128+64+32 |
||
104 | out dx,al ; номер головки/номер диска |
||
105 | inc edx |
||
106 | mov al,20h |
||
107 | out dx,al ; ATACommand регистр команд |
||
321 | diamond | 108 | sti |
160 | diamond | 109 | |
110 | call wait_for_sector_buffer |
||
111 | |||
112 | cmp [hd_error],0 |
||
113 | jne hd_read_error |
||
114 | |||
321 | diamond | 115 | cli |
160 | diamond | 116 | push edi |
117 | shl edi,9 |
||
118 | add edi,0x600000+65536 |
||
119 | mov ecx,256 |
||
120 | mov edx,[hdbase] |
||
121 | cld |
||
122 | rep insw |
||
123 | pop edi |
||
321 | diamond | 124 | sti |
160 | diamond | 125 | |
126 | pop edx eax |
||
127 | ret |
||
128 | |||
129 | disable_ide_int: |
||
162 | diamond | 130 | ; mov edx,[hdbase] |
131 | ; add edx,0x206 |
||
132 | ; mov al,2 |
||
133 | ; out dx,al |
||
134 | cli |
||
160 | diamond | 135 | ret |
136 | |||
137 | enable_ide_int: |
||
162 | diamond | 138 | ; mov edx,[hdbase] |
139 | ; add edx,0x206 |
||
140 | ; mov al,0 |
||
141 | ; out dx,al |
||
142 | sti |
||
160 | diamond | 143 | ret |
144 | |||
145 | align 4 |
||
146 | hd_write: |
||
147 | ;----------------------------------------------------------- |
||
148 | ; input : eax = block |
||
149 | ; ebx = pointer to memory |
||
150 | ;----------------------------------------------------------- |
||
151 | push ecx esi edi |
||
152 | |||
153 | ; check if the cache already has the sector and overwrite it |
||
154 | |||
155 | mov ecx,cache_max |
||
156 | mov esi,0x600000+8 |
||
157 | mov edi,1 |
||
158 | |||
159 | hdwritecache: |
||
160 | |||
161 | cmp dword [esi+4],0 ; if cache slot is empty |
||
162 | je not_in_cache_write |
||
163 | |||
164 | cmp [esi],eax ; if the slot has the sector |
||
165 | je yes_in_cache_write |
||
166 | |||
167 | not_in_cache_write: |
||
168 | |||
169 | add esi,8 |
||
170 | inc edi |
||
171 | dec ecx |
||
172 | jnz hdwritecache |
||
173 | |||
174 | ; sector not found in cache |
||
175 | ; write the block to a new location |
||
176 | |||
177 | call find_empty_slot ; ret in edi |
||
178 | cmp [hd_error],0 |
||
179 | jne hd_write_access_denied |
||
180 | |||
181 | lea esi,[edi*8+0x600000] |
||
182 | mov [esi],eax ; sector number |
||
183 | |||
184 | yes_in_cache_write: |
||
185 | |||
186 | mov dword [esi+4],2 ; write - differs from hd |
||
187 | |||
188 | shl edi,9 |
||
189 | add edi,0x600000+65536 |
||
190 | mov esi,ebx |
||
191 | mov ecx,512/4 |
||
192 | cld |
||
193 | rep movsd ; move data |
||
194 | hd_write_access_denied: |
||
195 | pop edi esi ecx |
||
196 | ret |
||
197 | |||
198 | |||
199 | write_cache: |
||
200 | ;----------------------------------------------------------- |
||
201 | ; write all changed sectors to disk |
||
202 | ;----------------------------------------------------------- |
||
203 | push eax ecx edx esi edi |
||
204 | |||
205 | ; write difference ( 2 ) from cache to hd |
||
206 | |||
207 | mov ecx,cache_max |
||
208 | mov esi,0x600000+8 |
||
209 | mov edi,1 |
||
210 | |||
211 | write_cache_more: |
||
212 | |||
213 | cmp dword [esi+4],2 ; if cache slot is not different |
||
214 | jne .write_chain |
||
215 | |||
216 | mov dword [esi+4],1 ; same as in hd |
||
217 | mov eax,[esi] ; eax = sector to write |
||
218 | |||
219 | cmp eax,[PARTITION_START] |
||
220 | jb danger |
||
221 | cmp eax,[PARTITION_END] |
||
222 | ja danger |
||
223 | |||
224 | cmp [dma_hdd], 1 |
||
210 | diamond | 225 | jmp .nodma |
160 | diamond | 226 | ; Объединяем запись цепочки последовательных секторов в одно обращение к диску |
227 | cmp ecx, 1 |
||
228 | jz .nonext |
||
229 | cmp dword [esi+8+4], 2 |
||
230 | jnz .nonext |
||
231 | push eax |
||
232 | inc eax |
||
233 | cmp eax, [esi+8] |
||
234 | pop eax |
||
235 | jnz .nonext |
||
236 | cmp [cache_chain_started], 1 |
||
237 | jz @f |
||
238 | mov [cache_chain_started], 1 |
||
239 | mov [cache_chain_size], 0 |
||
240 | mov [cache_chain_pos], edi |
||
241 | mov [cache_chain_ptr], esi |
||
242 | @@: |
||
243 | inc [cache_chain_size] |
||
244 | cmp [cache_chain_size], 64 |
||
245 | jnz .continue |
||
246 | jmp .write_chain |
||
247 | .nonext: |
||
248 | call flush_cache_chain |
||
249 | mov [cache_chain_size], 1 |
||
250 | mov [cache_chain_ptr], esi |
||
251 | call write_cache_sector |
||
252 | jmp .continue |
||
253 | .nodma: |
||
254 | call cache_write_pio |
||
255 | .write_chain: |
||
256 | call flush_cache_chain |
||
257 | |||
258 | .continue: |
||
259 | danger: |
||
260 | |||
261 | add esi,8 |
||
262 | inc edi |
||
263 | dec ecx |
||
264 | jnz write_cache_more |
||
265 | call flush_cache_chain |
||
266 | return_02: |
||
267 | pop edi esi edx ecx eax |
||
268 | ret |
||
269 | |||
270 | flush_cache_chain: |
||
271 | cmp [cache_chain_started], 0 |
||
272 | jz @f |
||
273 | call write_cache_chain |
||
274 | mov [cache_chain_started], 0 |
||
275 | @@: |
||
276 | ret |
||
277 | |||
278 | align 4 |
||
279 | cache_write_pio: |
||
280 | call disable_ide_int |
||
281 | |||
282 | call wait_for_hd_idle |
||
283 | cmp [hd_error],0 |
||
284 | jne hd_write_error |
||
285 | |||
286 | ; cli |
||
287 | xor eax,eax |
||
288 | mov edx,[hdbase] |
||
289 | inc edx |
||
290 | out dx,al |
||
291 | inc edx |
||
292 | inc eax |
||
293 | out dx,al |
||
294 | inc edx |
||
295 | mov eax,[esi] ; eax = sector to write |
||
296 | out dx,al |
||
297 | shr eax,8 |
||
298 | inc edx |
||
299 | out dx,al |
||
300 | shr eax,8 |
||
301 | inc edx |
||
302 | out dx,al |
||
303 | shr eax,8 |
||
304 | inc edx |
||
305 | and al,1+2+4+8 |
||
306 | add al,byte [hdid] |
||
307 | add al,128+64+32 |
||
308 | out dx,al |
||
309 | inc edx |
||
310 | mov al,30h |
||
311 | out dx,al |
||
312 | ; sti |
||
313 | |||
314 | call wait_for_sector_buffer |
||
315 | |||
316 | cmp [hd_error],0 |
||
317 | jne hd_write_error |
||
318 | |||
319 | push ecx esi |
||
320 | |||
321 | ; cli |
||
322 | mov esi,edi |
||
323 | shl esi,9 |
||
324 | add esi,0x600000+65536 ; esi = from memory position |
||
325 | mov ecx,256 |
||
326 | mov edx,[hdbase] |
||
327 | cld |
||
328 | rep outsw |
||
329 | ; sti |
||
330 | |||
331 | call enable_ide_int |
||
332 | pop esi ecx |
||
333 | |||
334 | ret |
||
335 | |||
336 | align 4 |
||
337 | find_empty_slot: |
||
338 | ;----------------------------------------------------------- |
||
339 | ; find empty or read slot, flush cache if next 10% is used by write |
||
340 | ; output : edi = cache slot |
||
341 | ;----------------------------------------------------------- |
||
342 | ; push ecx esi |
||
343 | |||
344 | search_again: |
||
345 | |||
346 | mov ecx,cache_max*10/100 |
||
347 | mov edi,[cache_search_start] |
||
348 | |||
349 | search_for_empty: |
||
350 | |||
351 | inc edi |
||
352 | cmp edi,cache_max |
||
353 | jbe inside_cache |
||
354 | mov edi,1 |
||
355 | |||
356 | inside_cache: |
||
357 | |||
358 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
||
359 | jb found_slot ; it's empty or read |
||
360 | dec ecx |
||
361 | jnz search_for_empty |
||
362 | |||
363 | call write_cache ; no empty slots found, write all |
||
364 | cmp [hd_error],0 |
||
365 | jne found_slot_access_denied |
||
366 | |||
367 | jmp search_again ; and start again |
||
368 | |||
369 | found_slot: |
||
370 | |||
371 | mov [cache_search_start],edi |
||
372 | found_slot_access_denied: |
||
373 | ret |
||
374 | |||
375 | align 4 |
||
376 | clear_hd_cache: |
||
377 | |||
378 | push eax ecx edi |
||
379 | mov edi,0x600000 |
||
380 | mov ecx,16384 |
||
381 | xor eax,eax |
||
382 | cld |
||
383 | rep stosd ; clear hd cache with 0 |
||
384 | mov [cache_search_start],eax |
||
385 | mov [fat_in_cache],-1 |
||
386 | mov [fat_change],0 |
||
387 | pop edi ecx eax |
||
388 | ret |
||
389 | |||
390 | save_hd_wait_timeout: |
||
391 | |||
392 | push eax |
||
393 | mov eax,[timer_ticks];[0xfdf0] |
||
394 | add eax,300 ; 3 sec timeout |
||
395 | mov [hd_wait_timeout],eax |
||
396 | pop eax |
||
397 | ret |
||
398 | |||
399 | align 4 |
||
400 | check_hd_wait_timeout: |
||
401 | |||
402 | push eax |
||
403 | mov eax,[hd_wait_timeout] |
||
404 | cmp [timer_ticks], eax ;[0xfdf0],eax |
||
405 | jg hd_timeout_error |
||
406 | pop eax |
||
407 | mov [hd_error],0 |
||
408 | ret |
||
409 | |||
410 | iglobal |
||
411 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
||
412 | hd_read_str db 'K : FS - HD read error',13,10,0 |
||
413 | hd_write_str db 'K : FS - HD write error',13,10,0 |
||
414 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
||
415 | endg |
||
416 | |||
417 | hd_timeout_error: |
||
418 | |||
321 | diamond | 419 | ; call clear_hd_cache |
420 | ; call clear_application_table_status |
||
160 | diamond | 421 | mov esi,hd_timeout_str |
422 | call sys_msg_board_str |
||
423 | ; jmp $ |
||
424 | mov [hd_error],1 |
||
425 | pop eax |
||
426 | ret |
||
427 | |||
428 | hd_read_error: |
||
429 | |||
321 | diamond | 430 | ; call clear_hd_cache |
431 | ; call clear_application_table_status |
||
160 | diamond | 432 | mov esi,hd_read_str |
433 | call sys_msg_board_str |
||
434 | pop edx eax |
||
161 | diamond | 435 | ret |
160 | diamond | 436 | |
437 | hd_write_error: |
||
438 | |||
321 | diamond | 439 | ; call clear_hd_cache |
440 | ; call clear_application_table_status |
||
160 | diamond | 441 | mov esi,hd_write_str |
442 | call sys_msg_board_str |
||
161 | diamond | 443 | ret |
160 | diamond | 444 | |
445 | hd_write_error_dma: |
||
321 | diamond | 446 | ; call clear_hd_cache |
447 | ; call clear_application_table_status |
||
160 | diamond | 448 | mov esi, hd_write_str |
449 | call sys_msg_board_str |
||
450 | pop esi |
||
161 | diamond | 451 | ret |
160 | diamond | 452 | |
453 | hd_lba_error: |
||
321 | diamond | 454 | ; call clear_hd_cache |
455 | ; call clear_application_table_status |
||
160 | diamond | 456 | mov esi,hd_lba_str |
457 | call sys_msg_board_str |
||
458 | jmp LBA_read_ret |
||
459 | |||
460 | |||
461 | align 4 |
||
462 | wait_for_hd_idle: |
||
463 | |||
464 | push eax edx |
||
465 | |||
466 | call save_hd_wait_timeout |
||
467 | |||
468 | mov edx,[hdbase] |
||
469 | add edx,0x7 |
||
470 | |||
471 | wfhil1: |
||
472 | |||
473 | call check_hd_wait_timeout |
||
474 | cmp [hd_error],0 |
||
475 | jne @f |
||
476 | |||
477 | in al,dx |
||
478 | test al,128 |
||
479 | jnz wfhil1 |
||
480 | |||
481 | @@: |
||
482 | |||
483 | pop edx eax |
||
484 | ret |
||
485 | |||
486 | |||
487 | align 4 |
||
488 | wait_for_sector_buffer: |
||
489 | |||
490 | push eax edx |
||
491 | |||
492 | mov edx,[hdbase] |
||
493 | add edx,0x7 |
||
494 | |||
495 | call save_hd_wait_timeout |
||
496 | |||
497 | hdwait_sbuf: ; wait for sector buffer to be ready |
||
498 | |||
499 | call check_hd_wait_timeout |
||
500 | cmp [hd_error],0 |
||
501 | jne @f |
||
502 | |||
503 | in al,dx |
||
504 | test al,8 |
||
505 | jz hdwait_sbuf |
||
506 | |||
507 | mov [hd_error],0 |
||
508 | |||
509 | cmp [hd_setup],1 ; do not mark error for setup request |
||
510 | je buf_wait_ok |
||
511 | |||
512 | test al,1 ; previous command ended up with an error |
||
513 | jz buf_wait_ok |
||
514 | @@: |
||
515 | mov [hd_error],1 |
||
516 | |||
517 | buf_wait_ok: |
||
518 | |||
519 | pop edx eax |
||
520 | ret |
||
521 | |||
161 | diamond | 522 | ; \begin{Mario79} |
160 | diamond | 523 | align 4 |
524 | wait_for_sector_dma_ide0: |
||
525 | push eax |
||
526 | push edx |
||
527 | call save_hd_wait_timeout |
||
528 | .wait: |
||
529 | call change_task |
||
530 | cmp [irq14_func], hdd_irq14 |
||
531 | jnz .done |
||
532 | call check_hd_wait_timeout |
||
533 | cmp [hd_error], 0 |
||
534 | jz .wait |
||
535 | mov [irq14_func], hdd_irq_null |
||
536 | mov dx, [IDEContrRegsBaseAddr] |
||
537 | mov al, 0 |
||
538 | out dx, al |
||
539 | .done: |
||
540 | pop edx |
||
541 | pop eax |
||
542 | ret |
||
543 | |||
544 | align 4 |
||
545 | wait_for_sector_dma_ide1: |
||
546 | push eax |
||
547 | push edx |
||
548 | call save_hd_wait_timeout |
||
549 | .wait: |
||
550 | call change_task |
||
551 | cmp [irq15_func], hdd_irq15 |
||
552 | jnz .done |
||
553 | call check_hd_wait_timeout |
||
554 | cmp [hd_error], 0 |
||
555 | jz .wait |
||
556 | mov [irq15_func], hdd_irq_null |
||
557 | mov dx, [IDEContrRegsBaseAddr] |
||
558 | add dx, 8 |
||
559 | mov al, 0 |
||
560 | out dx, al |
||
561 | .done: |
||
562 | pop edx |
||
563 | pop eax |
||
564 | ret |
||
565 | |||
566 | iglobal |
||
567 | align 4 |
||
568 | ; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary |
||
569 | IDE_descriptor_table: |
||
570 | dd 284000h |
||
571 | dw 2000h |
||
572 | dw 8000h |
||
573 | |||
574 | dma_cur_sector dd not 40h |
||
575 | irq14_func dd hdd_irq_null |
||
576 | irq15_func dd hdd_irq_null |
||
577 | endg |
||
578 | |||
579 | uglobal |
||
580 | ; all uglobals are zeroed at boot |
||
581 | dma_process dd 0 |
||
582 | dma_slot_ptr dd 0 |
||
583 | cache_chain_pos dd 0 |
||
584 | cache_chain_ptr dd 0 |
||
585 | cache_chain_size db 0 |
||
586 | cache_chain_started db 0 |
||
587 | dma_task_switched db 0 |
||
588 | dma_hdd db 0 |
||
589 | endg |
||
590 | |||
591 | align 4 |
||
592 | hdd_irq14: |
||
593 | pushfd |
||
594 | cli |
||
595 | pushad |
||
596 | mov [irq14_func], hdd_irq_null |
||
597 | mov dx, [IDEContrRegsBaseAddr] |
||
598 | mov al, 0 |
||
599 | out dx, al |
||
600 | call update_counters |
||
601 | mov ebx, [dma_process] |
||
602 | cmp [0x3000], ebx |
||
603 | jz .noswitch |
||
604 | mov [dma_task_switched], 1 |
||
605 | mov edi, [dma_slot_ptr] |
||
606 | mov eax, [0x3000] |
||
607 | mov [dma_process], eax |
||
608 | mov eax, [0x3010] |
||
609 | mov [dma_slot_ptr], eax |
||
610 | mov [0x3000], ebx |
||
611 | mov [0x3010], edi |
||
612 | mov byte [0xFFFF], 1 |
||
613 | call do_change_task |
||
614 | .noswitch: |
||
615 | popad |
||
616 | popfd |
||
617 | align 4 |
||
618 | hdd_irq_null: |
||
619 | ret |
||
620 | |||
621 | align 4 |
||
622 | hdd_irq15: |
||
623 | pushfd |
||
624 | cli |
||
625 | pushad |
||
626 | mov [irq15_func], hdd_irq_null |
||
627 | mov dx, [IDEContrRegsBaseAddr] |
||
628 | add dx, 8 |
||
629 | mov al, 0 |
||
630 | out dx, al |
||
631 | call update_counters |
||
632 | mov ebx, [dma_process] |
||
633 | cmp [0x3000], ebx |
||
634 | jz .noswitch |
||
635 | mov [dma_task_switched], 1 |
||
636 | mov edi, [dma_slot_ptr] |
||
637 | mov eax, [0x3000] |
||
638 | mov [dma_process], eax |
||
639 | mov eax, [0x3010] |
||
640 | mov [dma_slot_ptr], eax |
||
641 | mov [0x3000], ebx |
||
642 | mov [0x3010], edi |
||
643 | mov byte [0xFFFF], 1 |
||
644 | call do_change_task |
||
645 | .noswitch: |
||
646 | popad |
||
647 | popfd |
||
648 | ret |
||
649 | |||
650 | align 4 |
||
651 | hd_read_dma: |
||
652 | push eax |
||
653 | push edx |
||
654 | mov edx, [dma_cur_sector] |
||
655 | cmp eax, edx |
||
656 | jb .notread |
||
657 | add edx, 15 |
||
658 | cmp [esp+4], edx |
||
659 | ja .notread |
||
660 | mov eax, [esp+4] |
||
661 | sub eax, [dma_cur_sector] |
||
662 | shl eax, 9 |
||
663 | add eax, 0x284000 |
||
664 | push ecx esi edi |
||
665 | mov esi, eax |
||
666 | shl edi, 9 |
||
667 | add edi, 0x610000 |
||
668 | mov ecx, 512/4 |
||
669 | cld |
||
670 | rep movsd |
||
671 | pop edi esi ecx |
||
672 | pop edx |
||
673 | pop eax |
||
674 | ret |
||
675 | .notread: |
||
676 | mov eax, IDE_descriptor_table |
||
677 | mov dword [eax], 0x284000 |
||
678 | mov word [eax+4], 0x2000 |
||
679 | mov dx, [IDEContrRegsBaseAddr] |
||
680 | cmp [hdbase], 0x1F0 |
||
681 | jz @f |
||
682 | add edx, 8 |
||
683 | @@: |
||
684 | push edx |
||
685 | add edx, 4 |
||
686 | out dx, eax |
||
687 | pop edx |
||
688 | mov al, 0 |
||
689 | out dx, al |
||
690 | add edx, 2 |
||
691 | mov al, 6 |
||
692 | out dx, al |
||
693 | call wait_for_hd_idle |
||
694 | cmp [hd_error], 0 |
||
695 | jnz hd_read_error |
||
696 | call disable_ide_int |
||
697 | xor eax, eax |
||
698 | mov edx, [hdbase] |
||
699 | inc edx |
||
700 | out dx, al |
||
701 | inc edx |
||
702 | mov eax, 10h |
||
703 | out dx, al |
||
704 | inc edx |
||
705 | mov eax, [esp+4] |
||
706 | out dx, al |
||
707 | shr eax, 8 |
||
708 | inc edx |
||
709 | out dx, al |
||
710 | shr eax, 8 |
||
711 | inc edx |
||
712 | out dx, al |
||
713 | shr eax, 8 |
||
714 | inc edx |
||
715 | and al, 0xF |
||
716 | add al, byte [hdid] |
||
717 | add al, 11100000b |
||
718 | out dx, al |
||
719 | inc edx |
||
720 | mov al, 0xC8 |
||
721 | out dx, al |
||
722 | mov dx, [IDEContrRegsBaseAddr] |
||
723 | cmp [hdbase], 0x1F0 |
||
724 | jz @f |
||
725 | add dx, 8 |
||
726 | @@: |
||
727 | mov al, 9 |
||
728 | out dx, al |
||
729 | mov eax, [0x3000] |
||
730 | mov [dma_process], eax |
||
731 | mov eax, [0x3010] |
||
732 | mov [dma_slot_ptr], eax |
||
733 | cmp [hdbase], 0x1F0 |
||
734 | jnz .ide1 |
||
735 | mov [irq14_func], hdd_irq14 |
||
736 | jmp @f |
||
737 | .ide1: |
||
738 | mov [irq15_func], hdd_irq15 |
||
739 | @@: |
||
740 | call enable_ide_int |
||
741 | cmp [hdbase], 0x1F0 |
||
742 | jnz .wait_ide1 |
||
743 | call wait_for_sector_dma_ide0 |
||
744 | jmp @f |
||
745 | .wait_ide1: |
||
746 | call wait_for_sector_dma_ide1 |
||
747 | @@: |
||
748 | cmp [hd_error], 0 |
||
749 | jnz hd_read_error |
||
750 | pop edx |
||
751 | pop eax |
||
752 | mov [dma_cur_sector], eax |
||
753 | jmp hd_read_dma |
||
754 | |||
755 | align 4 |
||
756 | write_cache_chain: |
||
757 | push esi |
||
758 | mov eax, IDE_descriptor_table |
||
759 | mov edx, [cache_chain_pos] |
||
760 | shl edx, 9 |
||
761 | add edx, 0x610000 |
||
762 | mov [eax], edx |
||
763 | movzx edx, [cache_chain_size] |
||
764 | shl edx, 9 |
||
765 | mov [eax+4], dx |
||
766 | jmp do_write_dma |
||
767 | write_cache_sector: |
||
768 | push esi |
||
769 | mov eax, IDE_descriptor_table |
||
770 | mov edx, edi |
||
771 | shl edx, 9 |
||
772 | add edx, 0x610000 |
||
773 | mov [eax], edx |
||
774 | mov word [eax+4], 0x200 |
||
775 | do_write_dma: |
||
776 | mov dx, [IDEContrRegsBaseAddr] |
||
777 | cmp [hdbase], 0x1F0 |
||
778 | jz @f |
||
779 | add edx, 8 |
||
780 | @@: |
||
781 | push edx |
||
782 | add edx, 4 |
||
783 | out dx, eax |
||
784 | pop edx |
||
785 | mov al, 0 |
||
786 | out dx, al |
||
787 | add edx, 2 |
||
788 | mov al, 6 |
||
789 | out dx, al |
||
790 | call wait_for_hd_idle |
||
791 | cmp [hd_error], 0 |
||
792 | jnz hd_write_error_dma |
||
793 | call disable_ide_int |
||
794 | xor eax, eax |
||
795 | mov edx, [hdbase] |
||
796 | inc edx |
||
797 | out dx, al |
||
798 | inc edx |
||
799 | mov al, [cache_chain_size] |
||
800 | out dx, al |
||
801 | inc edx |
||
802 | mov esi, [cache_chain_ptr] |
||
803 | mov eax, [esi] |
||
804 | out dx, al |
||
805 | shr eax, 8 |
||
806 | inc edx |
||
807 | out dx, al |
||
808 | shr eax, 8 |
||
809 | inc edx |
||
810 | out dx, al |
||
811 | shr eax, 8 |
||
812 | inc edx |
||
813 | and al, 0xF |
||
814 | add al, byte [hdid] |
||
815 | add al, 11100000b |
||
816 | out dx, al |
||
817 | inc edx |
||
818 | mov al, 0xCA |
||
819 | out dx, al |
||
820 | mov dx, [IDEContrRegsBaseAddr] |
||
821 | cmp [hdbase], 0x1F0 |
||
822 | jz @f |
||
823 | add dx, 8 |
||
824 | @@: |
||
825 | mov al, 1 |
||
826 | out dx, al |
||
827 | mov eax, [0x3000] |
||
828 | mov [dma_process], eax |
||
829 | mov eax, [0x3010] |
||
830 | mov [dma_slot_ptr], eax |
||
831 | cmp [hdbase], 0x1F0 |
||
832 | jnz .ide1 |
||
833 | mov [irq14_func], hdd_irq14 |
||
834 | jmp @f |
||
835 | .ide1: |
||
836 | mov [irq15_func], hdd_irq15 |
||
837 | @@: |
||
838 | call enable_ide_int |
||
839 | mov [dma_cur_sector], not 0x40 |
||
840 | cmp [hdbase], 0x1F0 |
||
841 | jnz .wait_ide1 |
||
842 | call wait_for_sector_dma_ide0 |
||
843 | jmp @f |
||
844 | .wait_ide1: |
||
845 | call wait_for_sector_dma_ide1 |
||
846 | @@: |
||
847 | cmp [hd_error], 0 |
||
848 | jnz hd_write_error_dma |
||
849 | pop esi |
||
850 | ret |
||
851 | |||
852 | uglobal |
||
853 | IDEContrRegsBaseAddr dw ? |
||
854 | endg |
||
161 | diamond | 855 | ; \end{Mario79} |