WebSVN – Kolibri OS – Blame – /kernel/trunk/blkdev/hd_drv.inc

Rev	Author	Line No.	Line
425	victor	1	$Revision: 425 $
346	diamond	2	; Low-level driver for HDD access
		3	; DMA support by Mario79
160	diamond	4
		5	;**************************************************************************
		6	;
		7	; 0x600008 - first entry in cache list
		8	;
		9	; +0 - lba sector
		10	; +4 - state of cache sector
		11	; 0 = empty
		12	; 1 = used for read ( same as in hd )
		13	; 2 = used for write ( differs from hd )
		14	;
		15	; +65536 - cache entries
		16	;
		17	;**************************************************************************
		18
		19	align 4
		20	hd_read:
		21	;-----------------------------------------------------------
		22	; input : eax = block to read
		23	; ebx = destination
		24	;-----------------------------------------------------------
256	diamond	25	and [hd_error], 0
160	diamond	26	push ecx esi edi ; scan cache
		27
		28	mov ecx,cache_max ; entries in cache
389	serge	29	mov esi,OS_BASE+0x600000+8
160	diamond	30	mov edi,1
		31
		32	hdreadcache:
		33
		34	cmp dword [esi+4],0 ; empty
		35	je nohdcache
		36
		37	cmp [esi],eax ; correct sector
		38	je yeshdcache
		39
		40	nohdcache:
		41
		42	add esi,8
		43	inc edi
		44	dec ecx
		45	jnz hdreadcache
		46
		47	call find_empty_slot ; ret in edi
		48	cmp [hd_error],0
		49	jne return_01
		50	cmp [dma_hdd], 1
		51	jnz .nodma
		52	call hd_read_dma
		53	jmp @f
		54	.nodma:
		55	call hd_read_pio
		56	@@:
		57
389	serge	58	lea esi,[edi*8+OS_BASE+0x600000]
160	diamond	59	mov [esi],eax ; sector number
		60	mov dword [esi+4],1 ; hd read - mark as same as in hd
		61
		62	yeshdcache:
		63
		64	mov esi,edi
		65	shl esi,9
389	serge	66	add esi,OS_BASE+0x600000+65536
160	diamond	67	mov edi,ebx
		68	mov ecx,512/4
		69	cld
		70	rep movsd ; move data
		71	return_01:
		72	pop edi esi ecx
		73	ret
		74
		75	align 4
		76	hd_read_pio:
		77	push eax edx
		78
		79	call wait_for_hd_idle
		80	cmp [hd_error],0
389	serge	81	jne hd_read_error
160	diamond	82
321	diamond	83	cli
160	diamond	84	xor eax,eax
		85	mov edx,[hdbase]
		86	inc edx
		87	out dx,al ; ATAFeatures ॣ�� "�ᮡ��⥩"
		88	inc edx
		89	inc eax
		90	out dx,al ; ATASectorCount ��稪 ᥪ�஢
		91	inc edx
		92	mov eax,[esp+4]
		93	out dx,al ; ATASectorNumber ॣ�� ᥪ��
		94	shr eax,8
		95	inc edx
		96	out dx,al ; ATACylinder �� 樫�� (��訩 ��)
		97	shr eax,8
		98	inc edx
		99	out dx,al ; �� 樫�� (��訩 ��)
		100	shr eax,8
		101	inc edx
		102	and al,1+2+4+8
		103	add al,byte [hdid]
		104	add al,128+64+32
		105	out dx,al ; �� /�� ᪠
		106	inc edx
		107	mov al,20h
		108	out dx,al ; ATACommand ॣ��
321	diamond	109	sti
160	diamond	110
		111	call wait_for_sector_buffer
		112
		113	cmp [hd_error],0
		114	jne hd_read_error
		115
321	diamond	116	cli
160	diamond	117	push edi
		118	shl edi,9
389	serge	119	add edi,OS_BASE+0x600000+65536
160	diamond	120	mov ecx,256
		121	mov edx,[hdbase]
		122	cld
		123	rep insw
		124	pop edi
321	diamond	125	sti
160	diamond	126
		127	pop edx eax
		128	ret
		129
389	serge	130	disable_ide_int:
162	diamond	131	; mov edx,[hdbase]
		132	; add edx,0x206
		133	; mov al,2
		134	; out dx,al
		135	cli
160	diamond	136	ret
		137
		138	enable_ide_int:
162	diamond	139	; mov edx,[hdbase]
		140	; add edx,0x206
		141	; mov al,0
		142	; out dx,al
		143	sti
160	diamond	144	ret
		145
		146	align 4
		147	hd_write:
		148	;-----------------------------------------------------------
		149	; input : eax = block
		150	; ebx = pointer to memory
		151	;-----------------------------------------------------------
		152	push ecx esi edi
		153
		154	; check if the cache already has the sector and overwrite it
		155
		156	mov ecx,cache_max
389	serge	157	mov esi,OS_BASE+0x600000+8
160	diamond	158	mov edi,1
		159
		160	hdwritecache:
		161
		162	cmp dword [esi+4],0 ; if cache slot is empty
		163	je not_in_cache_write
		164
		165	cmp [esi],eax ; if the slot has the sector
		166	je yes_in_cache_write
		167
		168	not_in_cache_write:
		169
		170	add esi,8
		171	inc edi
		172	dec ecx
		173	jnz hdwritecache
		174
		175	; sector not found in cache
		176	; write the block to a new location
		177
		178	call find_empty_slot ; ret in edi
		179	cmp [hd_error],0
		180	jne hd_write_access_denied
		181
389	serge	182	lea esi,[edi*8+OS_BASE+0x600000]
160	diamond	183	mov [esi],eax ; sector number
		184
		185	yes_in_cache_write:
		186
		187	mov dword [esi+4],2 ; write - differs from hd
		188
		189	shl edi,9
389	serge	190	add edi,OS_BASE+0x600000+65536
160	diamond	191	mov esi,ebx
		192	mov ecx,512/4
		193	cld
		194	rep movsd ; move data
		195	hd_write_access_denied:
		196	pop edi esi ecx
		197	ret
		198
		199
		200	write_cache:
		201	;-----------------------------------------------------------
		202	; write all changed sectors to disk
		203	;-----------------------------------------------------------
		204	push eax ecx edx esi edi
		205
		206	; write difference ( 2 ) from cache to hd
		207
		208	mov ecx,cache_max
389	serge	209	mov esi,OS_BASE+0x600000+8
160	diamond	210	mov edi,1
		211
		212	write_cache_more:
		213
		214	cmp dword [esi+4],2 ; if cache slot is not different
		215	jne .write_chain
		216
		217	mov dword [esi+4],1 ; same as in hd
		218	mov eax,[esi] ; eax = sector to write
		219
		220	cmp eax,[PARTITION_START]
		221	jb danger
		222	cmp eax,[PARTITION_END]
		223	ja danger
346	diamond	224
		225	cmp [allow_dma_write], 1
		226	jnz .nodma
160	diamond	227	cmp [dma_hdd], 1
346	diamond	228	jnz .nodma
160	diamond	229	; ��ꥤ��塞 �� 楯�窨 ��᫥��⥫�� ᥪ�஢ � �� 饭��
		230	cmp ecx, 1
		231	jz .nonext
		232	cmp dword [esi+8+4], 2
		233	jnz .nonext
		234	push eax
		235	inc eax
		236	cmp eax, [esi+8]
		237	pop eax
		238	jnz .nonext
		239	cmp [cache_chain_started], 1
		240	jz @f
		241	mov [cache_chain_started], 1
		242	mov [cache_chain_size], 0
		243	mov [cache_chain_pos], edi
		244	mov [cache_chain_ptr], esi
		245	@@:
		246	inc [cache_chain_size]
		247	cmp [cache_chain_size], 64
		248	jnz .continue
		249	jmp .write_chain
		250	.nonext:
		251	call flush_cache_chain
		252	mov [cache_chain_size], 1
		253	mov [cache_chain_ptr], esi
		254	call write_cache_sector
		255	jmp .continue
		256	.nodma:
		257	call cache_write_pio
		258	.write_chain:
		259	call flush_cache_chain
		260
		261	.continue:
		262	danger:
		263
		264	add esi,8
		265	inc edi
		266	dec ecx
		267	jnz write_cache_more
		268	call flush_cache_chain
		269	return_02:
		270	pop edi esi edx ecx eax
		271	ret
		272
		273	flush_cache_chain:
		274	cmp [cache_chain_started], 0
		275	jz @f
		276	call write_cache_chain
		277	mov [cache_chain_started], 0
		278	@@:
		279	ret
		280
		281	align 4
		282	cache_write_pio:
		283	call disable_ide_int
		284
		285	call wait_for_hd_idle
		286	cmp [hd_error],0
		287	jne hd_write_error
		288
		289	; cli
		290	xor eax,eax
		291	mov edx,[hdbase]
		292	inc edx
		293	out dx,al
		294	inc edx
		295	inc eax
		296	out dx,al
		297	inc edx
		298	mov eax,[esi] ; eax = sector to write
		299	out dx,al
		300	shr eax,8
		301	inc edx
		302	out dx,al
		303	shr eax,8
		304	inc edx
		305	out dx,al
		306	shr eax,8
		307	inc edx
		308	and al,1+2+4+8
		309	add al,byte [hdid]
		310	add al,128+64+32
		311	out dx,al
		312	inc edx
		313	mov al,30h
		314	out dx,al
		315	; sti
		316
		317	call wait_for_sector_buffer
		318
		319	cmp [hd_error],0
		320	jne hd_write_error
		321
		322	push ecx esi
		323
		324	; cli
		325	mov esi,edi
		326	shl esi,9
389	serge	327	add esi,OS_BASE+0x600000+65536 ; esi = from memory position
160	diamond	328	mov ecx,256
		329	mov edx,[hdbase]
		330	cld
		331	rep outsw
		332	; sti
		333
		334	call enable_ide_int
		335	pop esi ecx
		336
		337	ret
		338
		339	align 4
		340	find_empty_slot:
		341	;-----------------------------------------------------------
		342	; find empty or read slot, flush cache if next 10% is used by write
		343	; output : edi = cache slot
		344	;-----------------------------------------------------------
		345	; push ecx esi
		346
		347	search_again:
		348
		349	mov ecx,cache_max*10/100
		350	mov edi,[cache_search_start]
		351
		352	search_for_empty:
		353
		354	inc edi
		355	cmp edi,cache_max
		356	jbe inside_cache
		357	mov edi,1
		358
		359	inside_cache:
		360
389	serge	361	cmp dword [edi*8+OS_BASE+0x600000+4],2 ; get cache slot info
160	diamond	362	jb found_slot ; it's empty or read
		363	dec ecx
		364	jnz search_for_empty
		365
		366	call write_cache ; no empty slots found, write all
		367	cmp [hd_error],0
		368	jne found_slot_access_denied
		369
		370	jmp search_again ; and start again
		371
		372	found_slot:
		373
		374	mov [cache_search_start],edi
		375	found_slot_access_denied:
		376	ret
		377
		378	align 4
		379	clear_hd_cache:
		380
		381	push eax ecx edi
389	serge	382	mov edi,OS_BASE+0x600000
160	diamond	383	mov ecx,16384
		384	xor eax,eax
		385	cld
		386	rep stosd ; clear hd cache with 0
		387	mov [cache_search_start],eax
		388	mov [fat_in_cache],-1
		389	mov [fat_change],0
		390	pop edi ecx eax
		391	ret
		392
		393	save_hd_wait_timeout:
		394
		395	push eax
		396	mov eax,[timer_ticks];[0xfdf0]
		397	add eax,300 ; 3 sec timeout
		398	mov [hd_wait_timeout],eax
		399	pop eax
		400	ret
		401
		402	align 4
		403	check_hd_wait_timeout:
		404
		405	push eax
		406	mov eax,[hd_wait_timeout]
		407	cmp [timer_ticks], eax ;[0xfdf0],eax
		408	jg hd_timeout_error
		409	pop eax
		410	mov [hd_error],0
		411	ret
		412
358	mikedld	413	;iglobal
		414	; hd_timeout_str db 'K : FS - HD timeout',0
		415	; hd_read_str db 'K : FS - HD read error',0
		416	; hd_write_str db 'K : FS - HD write error',0
		417	; hd_lba_str db 'K : FS - HD LBA error',0
		418	;endg
160	diamond	419
		420	hd_timeout_error:
		421
321	diamond	422	; call clear_hd_cache
		423	; call clear_application_table_status
358	mikedld	424	; mov esi,hd_timeout_str
		425	; call sys_msg_board_str
		426	DEBUGF 1,"K : FS - HD timeout\n"
160	diamond	427	; jmp $
		428	mov [hd_error],1
		429	pop eax
		430	ret
		431
		432	hd_read_error:
		433
321	diamond	434	; call clear_hd_cache
		435	; call clear_application_table_status
358	mikedld	436	; mov esi,hd_read_str
		437	; call sys_msg_board_str
		438	DEBUGF 1,"K : FS - HD read error\n"
160	diamond	439	pop edx eax
161	diamond	440	ret
160	diamond	441
		442	hd_write_error:
		443
321	diamond	444	; call clear_hd_cache
		445	; call clear_application_table_status
358	mikedld	446	; mov esi,hd_write_str
		447	; call sys_msg_board_str
		448	DEBUGF 1,"K : FS - HD write error\n"
161	diamond	449	ret
160	diamond	450
		451	hd_write_error_dma:
321	diamond	452	; call clear_hd_cache
		453	; call clear_application_table_status
358	mikedld	454	; mov esi, hd_write_str
		455	; call sys_msg_board_str
		456	DEBUGF 1,"K : FS - HD read error\n"
160	diamond	457	pop esi
161	diamond	458	ret
160	diamond	459
		460	hd_lba_error:
321	diamond	461	; call clear_hd_cache
		462	; call clear_application_table_status
358	mikedld	463	; mov esi,hd_lba_str
		464	; call sys_msg_board_str
		465	DEBUGF 1,"K : FS - HD LBA error\n"
160	diamond	466	jmp LBA_read_ret
		467
		468
		469	align 4
		470	wait_for_hd_idle:
		471
		472	push eax edx
		473
		474	call save_hd_wait_timeout
		475
		476	mov edx,[hdbase]
		477	add edx,0x7
		478
		479	wfhil1:
		480
		481	call check_hd_wait_timeout
		482	cmp [hd_error],0
		483	jne @f
		484
		485	in al,dx
		486	test al,128
		487	jnz wfhil1
389	serge	488
160	diamond	489	@@:
		490
		491	pop edx eax
		492	ret
		493
		494
		495	align 4
		496	wait_for_sector_buffer:
		497
		498	push eax edx
		499
		500	mov edx,[hdbase]
		501	add edx,0x7
		502
		503	call save_hd_wait_timeout
		504
		505	hdwait_sbuf: ; wait for sector buffer to be ready
		506
		507	call check_hd_wait_timeout
		508	cmp [hd_error],0
		509	jne @f
		510
		511	in al,dx
		512	test al,8
		513	jz hdwait_sbuf
		514
		515	mov [hd_error],0
		516
		517	cmp [hd_setup],1 ; do not mark error for setup request
		518	je buf_wait_ok
		519
		520	test al,1 ; previous command ended up with an error
		521	jz buf_wait_ok
		522	@@:
		523	mov [hd_error],1
		524
		525	buf_wait_ok:
		526
		527	pop edx eax
		528	ret
		529
346	diamond	530	; \begin{Mario79}
160	diamond	531	align 4
		532	wait_for_sector_dma_ide0:
		533	push eax
		534	push edx
		535	call save_hd_wait_timeout
		536	.wait:
		537	call change_task
		538	cmp [irq14_func], hdd_irq14
		539	jnz .done
		540	call check_hd_wait_timeout
		541	cmp [hd_error], 0
		542	jz .wait
		543	mov [irq14_func], hdd_irq_null
		544	mov dx, [IDEContrRegsBaseAddr]
		545	mov al, 0
		546	out dx, al
		547	.done:
		548	pop edx
		549	pop eax
		550	ret
		551
		552	align 4
		553	wait_for_sector_dma_ide1:
		554	push eax
		555	push edx
		556	call save_hd_wait_timeout
		557	.wait:
		558	call change_task
		559	cmp [irq15_func], hdd_irq15
		560	jnz .done
		561	call check_hd_wait_timeout
		562	cmp [hd_error], 0
		563	jz .wait
		564	mov [irq15_func], hdd_irq_null
		565	mov dx, [IDEContrRegsBaseAddr]
		566	add dx, 8
		567	mov al, 0
		568	out dx, al
		569	.done:
		570	pop edx
		571	pop eax
		572	ret
		573
		574	iglobal
		575	align 4
		576	; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary
		577	IDE_descriptor_table:
389	serge	578	dd OS_BASE+284000h
160	diamond	579	dw 2000h
		580	dw 8000h
		581
		582	dma_cur_sector dd not 40h
		583	irq14_func dd hdd_irq_null
		584	irq15_func dd hdd_irq_null
		585	endg
		586
		587	uglobal
		588	; all uglobals are zeroed at boot
		589	dma_process dd 0
		590	dma_slot_ptr dd 0
		591	cache_chain_pos dd 0
		592	cache_chain_ptr dd 0
		593	cache_chain_size db 0
		594	cache_chain_started db 0
		595	dma_task_switched db 0
		596	dma_hdd db 0
346	diamond	597	allow_dma_write db 0
160	diamond	598	endg
		599
		600	align 4
		601	hdd_irq14:
		602	pushfd
		603	cli
		604	pushad
		605	mov [irq14_func], hdd_irq_null
		606	mov dx, [IDEContrRegsBaseAddr]
		607	mov al, 0
		608	out dx, al
		609	call update_counters
		610	mov ebx, [dma_process]
389	serge	611	cmp [CURRENT_TASK], ebx
160	diamond	612	jz .noswitch
		613	mov [dma_task_switched], 1
		614	mov edi, [dma_slot_ptr]
389	serge	615	mov eax, [CURRENT_TASK]
160	diamond	616	mov [dma_process], eax
389	serge	617	mov eax, [TASK_BASE]
160	diamond	618	mov [dma_slot_ptr], eax
389	serge	619	mov [CURRENT_TASK], ebx
		620	mov [TASK_BASE], edi
160	diamond	621	mov byte [0xFFFF], 1
		622	call do_change_task
		623	.noswitch:
		624	popad
		625	popfd
		626	align 4
		627	hdd_irq_null:
		628	ret
		629
		630	align 4
		631	hdd_irq15:
		632	pushfd
		633	cli
		634	pushad
		635	mov [irq15_func], hdd_irq_null
		636	mov dx, [IDEContrRegsBaseAddr]
		637	add dx, 8
		638	mov al, 0
		639	out dx, al
		640	call update_counters
		641	mov ebx, [dma_process]
389	serge	642	cmp [CURRENT_TASK], ebx
160	diamond	643	jz .noswitch
		644	mov [dma_task_switched], 1
		645	mov edi, [dma_slot_ptr]
389	serge	646	mov eax, [CURRENT_TASK]
160	diamond	647	mov [dma_process], eax
389	serge	648	mov eax, [TASK_BASE]
160	diamond	649	mov [dma_slot_ptr], eax
389	serge	650	mov [CURRENT_TASK], ebx
		651	mov [TASK_BASE], edi
160	diamond	652	mov byte [0xFFFF], 1
		653	call do_change_task
		654	.noswitch:
		655	popad
		656	popfd
		657	ret
		658
		659	align 4
		660	hd_read_dma:
		661	push eax
		662	push edx
		663	mov edx, [dma_cur_sector]
		664	cmp eax, edx
		665	jb .notread
		666	add edx, 15
		667	cmp [esp+4], edx
		668	ja .notread
		669	mov eax, [esp+4]
		670	sub eax, [dma_cur_sector]
		671	shl eax, 9
389	serge	672	add eax, OS_BASE+0x284000
160	diamond	673	push ecx esi edi
		674	mov esi, eax
		675	shl edi, 9
389	serge	676	add edi, OS_BASE+0x610000
160	diamond	677	mov ecx, 512/4
		678	cld
		679	rep movsd
		680	pop edi esi ecx
		681	pop edx
		682	pop eax
		683	ret
		684	.notread:
389	serge	685	mov eax, IDE_descriptor_table-OS_BASE
		686	mov dword [eax+OS_BASE], 0x284000
		687	mov word [eax+4+OS_BASE], 0x2000
160	diamond	688	mov dx, [IDEContrRegsBaseAddr]
		689	cmp [hdbase], 0x1F0
		690	jz @f
		691	add edx, 8
		692	@@:
		693	push edx
		694	add edx, 4
		695	out dx, eax
		696	pop edx
		697	mov al, 0
		698	out dx, al
		699	add edx, 2
		700	mov al, 6
		701	out dx, al
		702	call wait_for_hd_idle
		703	cmp [hd_error], 0
		704	jnz hd_read_error
		705	call disable_ide_int
		706	xor eax, eax
		707	mov edx, [hdbase]
		708	inc edx
		709	out dx, al
		710	inc edx
		711	mov eax, 10h
		712	out dx, al
		713	inc edx
		714	mov eax, [esp+4]
		715	out dx, al
		716	shr eax, 8
		717	inc edx
		718	out dx, al
		719	shr eax, 8
		720	inc edx
		721	out dx, al
		722	shr eax, 8
		723	inc edx
		724	and al, 0xF
		725	add al, byte [hdid]
		726	add al, 11100000b
		727	out dx, al
		728	inc edx
		729	mov al, 0xC8
		730	out dx, al
		731	mov dx, [IDEContrRegsBaseAddr]
		732	cmp [hdbase], 0x1F0
		733	jz @f
		734	add dx, 8
		735	@@:
		736	mov al, 9
		737	out dx, al
389	serge	738	mov eax, [CURRENT_TASK]
160	diamond	739	mov [dma_process], eax
389	serge	740	mov eax, [TASK_BASE]
160	diamond	741	mov [dma_slot_ptr], eax
		742	cmp [hdbase], 0x1F0
		743	jnz .ide1
		744	mov [irq14_func], hdd_irq14
		745	jmp @f
		746	.ide1:
		747	mov [irq15_func], hdd_irq15
		748	@@:
		749	call enable_ide_int
		750	cmp [hdbase], 0x1F0
		751	jnz .wait_ide1
		752	call wait_for_sector_dma_ide0
		753	jmp @f
		754	.wait_ide1:
		755	call wait_for_sector_dma_ide1
		756	@@:
		757	cmp [hd_error], 0
		758	jnz hd_read_error
		759	pop edx
		760	pop eax
		761	mov [dma_cur_sector], eax
		762	jmp hd_read_dma
		763
		764	align 4
		765	write_cache_chain:
		766	push esi
		767	mov eax, IDE_descriptor_table
		768	mov edx, [cache_chain_pos]
		769	shl edx, 9
389	serge	770	add edx, OS_BASE+0x610000
160	diamond	771	mov [eax], edx
		772	movzx edx, [cache_chain_size]
		773	shl edx, 9
		774	mov [eax+4], dx
		775	jmp do_write_dma
		776	write_cache_sector:
		777	push esi
		778	mov eax, IDE_descriptor_table
		779	mov edx, edi
		780	shl edx, 9
389	serge	781	add edx, OS_BASE+0x610000
160	diamond	782	mov [eax], edx
		783	mov word [eax+4], 0x200
		784	do_write_dma:
		785	mov dx, [IDEContrRegsBaseAddr]
		786	cmp [hdbase], 0x1F0
		787	jz @f
		788	add edx, 8
		789	@@:
		790	push edx
		791	add edx, 4
		792	out dx, eax
		793	pop edx
		794	mov al, 0
		795	out dx, al
		796	add edx, 2
		797	mov al, 6
		798	out dx, al
		799	call wait_for_hd_idle
		800	cmp [hd_error], 0
		801	jnz hd_write_error_dma
		802	call disable_ide_int
		803	xor eax, eax
		804	mov edx, [hdbase]
		805	inc edx
		806	out dx, al
		807	inc edx
		808	mov al, [cache_chain_size]
		809	out dx, al
		810	inc edx
		811	mov esi, [cache_chain_ptr]
		812	mov eax, [esi]
		813	out dx, al
		814	shr eax, 8
		815	inc edx
		816	out dx, al
		817	shr eax, 8
		818	inc edx
		819	out dx, al
		820	shr eax, 8
		821	inc edx
		822	and al, 0xF
		823	add al, byte [hdid]
		824	add al, 11100000b
		825	out dx, al
		826	inc edx
		827	mov al, 0xCA
		828	out dx, al
		829	mov dx, [IDEContrRegsBaseAddr]
		830	cmp [hdbase], 0x1F0
		831	jz @f
		832	add dx, 8
		833	@@:
		834	mov al, 1
		835	out dx, al
389	serge	836	mov eax, [CURRENT_TASK]
160	diamond	837	mov [dma_process], eax
389	serge	838	mov eax, [TASK_BASE]
160	diamond	839	mov [dma_slot_ptr], eax
		840	cmp [hdbase], 0x1F0
		841	jnz .ide1
		842	mov [irq14_func], hdd_irq14
		843	jmp @f
		844	.ide1:
		845	mov [irq15_func], hdd_irq15
		846	@@:
		847	call enable_ide_int
		848	mov [dma_cur_sector], not 0x40
		849	cmp [hdbase], 0x1F0
		850	jnz .wait_ide1
		851	call wait_for_sector_dma_ide0
		852	jmp @f
		853	.wait_ide1:
		854	call wait_for_sector_dma_ide1
		855	@@:
		856	cmp [hd_error], 0
		857	jnz hd_write_error_dma
		858	pop esi
		859	ret
		860
		861	uglobal
		862	IDEContrRegsBaseAddr dw ?
		863	endg
346	diamond	864	; \end{Mario79}

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(root)/kernel/trunk/blkdev/hd_drv.inc – Rev 425