WebSVN – Kolibri OS – Blame – /kernel/branches/kolibri-process/blkdev/ide_cache.inc

Rev	Author	Line No.	Line
4429	Serge	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
		8	;**************************************************************************
		9	;
		10	; [cache_ide[X]_pointer]
		11	; or [cache_ide[X]_data_pointer] first entry in cache list
		12	;
		13	; +0 - lba sector
		14	; +4 - state of cache sector
		15	; 0 = empty
		16	; 1 = used for read ( same as in hd )
		17	; 2 = used for write ( differs from hd )
		18	;
		19	; [cache_ide[X]_system_data]
		20	; or [cache_ide[x]_appl_data] - cache entries
		21	;
		22	;**************************************************************************
		23
4993	Serge	24	$Revision: 4700 $
4429	Serge	25
		26	align 4
		27	find_empty_slot_CD_cache:
		28	;-----------------------------------------------------------
		29	; find empty or read slot, flush cache if next 10% is used by write
		30	; output : edi = cache slot
		31	;-----------------------------------------------------------
		32	.search_again:
		33	call cd_calculate_cache_3
		34	.search_for_empty:
		35	inc edi
		36	call cd_calculate_cache_4
		37	jbe .inside_cache
		38	mov edi, 1
		39	.inside_cache:
		40	call cd_calculate_cache_5
		41	ret
		42	;--------------------------------------------------------------------
		43	clear_CD_cache:
4923	Serge	44	DEBUGF 1, 'K : clear_CD_cache\n'
4429	Serge	45	pusha
4923	Serge	46
		47	mov esi, [cdpos]
		48	dec esi
		49	imul esi, sizeof.IDE_CACHE
		50	add esi, cache_ide0
		51
4429	Serge	52	xor eax, eax
4923	Serge	53
		54	mov [esi+IDE_CACHE.search_start], eax
		55	mov ecx, [esi+IDE_CACHE.system_sad_size]
		56	mov edi, [esi+IDE_CACHE.pointer]
4429	Serge	57	call .clear
4923	Serge	58
		59	mov [esi+IDE_CACHE.appl_search_start], eax
		60	mov ecx, [esi+IDE_CACHE.appl_sad_size]
		61	mov edi, [esi+IDE_CACHE.data_pointer]
4429	Serge	62	call .clear
4923	Serge	63
4429	Serge	64	popa
		65	ret
4923	Serge	66	;--------------------------------------
4429	Serge	67	.clear:
		68	shl ecx, 1
		69	cld
		70	rep stosd
		71	ret
		72	;--------------------------------------------------------------------
		73	align 4
		74	cd_calculate_cache:
4923	Serge	75	; 1 - IDE0 ... 12 - IDE11
		76	push eax
		77
		78	mov eax, [cdpos]
		79	dec eax
		80	imul eax, sizeof.IDE_CACHE
		81	add eax, cache_ide0
		82
4429	Serge	83	cmp [cd_appl_data], 0
4923	Serge	84	jne @f
		85
		86	mov ecx, [eax+IDE_CACHE.system_sad_size]
		87	mov esi, [eax+IDE_CACHE.pointer]
		88	pop eax
4429	Serge	89	ret
4923	Serge	90	;--------------------------------------
		91	@@:
		92	mov ecx, [eax+IDE_CACHE.appl_sad_size]
		93	mov esi, [eax+IDE_CACHE.data_pointer]
		94	pop eax
4429	Serge	95	ret
		96	;--------------------------------------------------------------------
		97	align 4
		98	cd_calculate_cache_1:
4923	Serge	99	; 1 - IDE0 ... 12 - IDE11
		100	push eax
		101
		102	mov eax, [cdpos]
		103	dec eax
		104	imul eax, sizeof.IDE_CACHE
		105	add eax, cache_ide0
		106
4429	Serge	107	cmp [cd_appl_data], 0
4923	Serge	108	jne @f
		109
		110	mov esi, [eax+IDE_CACHE.pointer]
		111	pop eax
4429	Serge	112	ret
4923	Serge	113	;--------------------------------------
		114	@@:
		115	mov esi, [eax+IDE_CACHE.data_pointer]
		116	pop eax
4429	Serge	117	ret
		118	;--------------------------------------------------------------------
		119	align 4
		120	cd_calculate_cache_2:
4923	Serge	121	; 1 - IDE0 ... 12 - IDE11
		122	mov eax, [cdpos]
		123	dec eax
		124	imul eax, sizeof.IDE_CACHE
		125	add eax, cache_ide0
		126
4429	Serge	127	cmp [cd_appl_data], 0
4923	Serge	128	jne @f
		129
		130	mov eax, [eax+IDE_CACHE.system_data]
4429	Serge	131	ret
4923	Serge	132	;--------------------------------------
		133	@@:
		134	mov eax, [eax+IDE_CACHE.appl_data]
4429	Serge	135	ret
		136	;--------------------------------------------------------------------
		137	align 4
		138	cd_calculate_cache_3:
4923	Serge	139	; 1 - IDE0 ... 12 - IDE11
		140	push eax
4429	Serge	141
4923	Serge	142	mov eax, [cdpos]
		143	dec eax
		144	imul eax, sizeof.IDE_CACHE
		145	add eax, cache_ide0
		146
4429	Serge	147	cmp [cd_appl_data], 0
4923	Serge	148	jne @f
		149
		150	mov edi, [eax+IDE_CACHE.search_start]
		151	pop eax
4429	Serge	152	ret
4923	Serge	153	;--------------------------------------
		154	@@:
		155	mov edi, [eax+IDE_CACHE.appl_search_start]
		156	pop eax
4429	Serge	157	ret
		158	;--------------------------------------------------------------------
		159	align 4
		160	cd_calculate_cache_4:
4923	Serge	161	; 1 - IDE0 ... 12 - IDE11
		162	push eax
		163
		164	mov eax, [cdpos]
		165	dec eax
		166	imul eax, sizeof.IDE_CACHE
		167	add eax, cache_ide0
		168
4429	Serge	169	cmp [cd_appl_data], 0
4923	Serge	170	jne @f
		171
		172	cmp edi, [eax+IDE_CACHE.system_sad_size]
		173	pop eax
4429	Serge	174	ret
4923	Serge	175	;--------------------------------------
		176	@@:
		177	cmp edi, [eax+IDE_CACHE.appl_sad_size]
		178	pop eax
4429	Serge	179	ret
		180	;--------------------------------------------------------------------
		181	align 4
		182	cd_calculate_cache_5:
4923	Serge	183	; 1 - IDE0 ... 12 - IDE11
		184	push eax
		185
		186	mov eax, [cdpos]
		187	dec eax
		188	imul eax, sizeof.IDE_CACHE
		189	add eax, cache_ide0
		190
4429	Serge	191	cmp [cd_appl_data], 0
4923	Serge	192	jne @f
		193
		194	mov [eax+IDE_CACHE.search_start], edi
		195	pop eax
4429	Serge	196	ret
4923	Serge	197	;--------------------------------------
		198	@@:
		199	mov [eax+IDE_CACHE.appl_search_start], edi
		200	pop eax
4429	Serge	201	ret
		202	;--------------------------------------------------------------------

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