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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeTransfer.asm@ 235

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Last change on this file since 235 was 223, checked in by krille_n_@…, 13 years ago

Changes:

Fixed what appears to be a mistake in EBIOS.inc
Added a 'release' option to the makefile of the Serial Server (invokes UPX)
Some very minor optimizations
Removed the eSEG macro and did some other cleanups (fixed typos etc)

File size: 11.1 KB

Rev	Line
[150]	1	; Project name : XTIDE Universal BIOS
	2	; Description : IDE Device transfer functions.
	3
	4	; Structure containing variables for PIO transfer functions.
	5	; This struct must not be larger than IDEPACK without INTPACK.
	6	struc PIOVARS
[218]	7	.wWordsInBlock resb 2 ; 0, Block size in WORDs
	8	.wWordsLeft resb 2 ; 2, WORDs left to transfer
	9	.wWordsDone resb 2 ; 4, Number of sectors xferred
[223]	10	resb 1 ; 6,
[218]	11	resb 1 ; 7, IDEPACK.bDeviceControl
	12	.wDataPort resb 2 ; 8, IDE Data Port
	13	.fnXfer resb 2 ; 10, Offset to transfer function
[150]	14	endstruc
	15
	16
	17	; Section containing code
	18	SECTION .text
	19
	20	;--------------------------------------------------------------------
	21	; IdeTransfer_StartWithCommandInAL
	22	; Parameters:
	23	; AL: IDE command that was used to start the transfer
[171]	24	; (all PIO read and write commands including Identify Device)
[218]	25	; ES:SI: Ptr to normalized data buffer
[150]	26	; DS:DI: Ptr to DPT (in RAMVARS segment)
	27	; SS:BP: Ptr to IDEPACK
	28	; Returns:
	29	; AH: INT 13h Error Code
[218]	30	; CX: Number of successfully transferred sectors
[150]	31	; CF: Cleared if success, Set if error
	32	; Corrupts registers:
[218]	33	; AL, BX, DX, SI, ES
[150]	34	;--------------------------------------------------------------------
	35	ALIGN JUMP_ALIGN
	36	IdeTransfer_StartWithCommandInAL:
[218]	37	mov ah, [bp+IDEPACK.bSectorCount]
[169]	38
[157]	39	; Are we reading or writing?
[171]	40	test al, 16 ; Bit 4 is cleared on all the read commands but set on 3 of the 4 write commands
	41	jnz SHORT .PrepareToWriteDataFromESSI
	42	cmp al, COMMAND_WRITE_MULTIPLE
	43	je SHORT .PrepareToWriteDataFromESSI
[150]	44
	45	; Prepare to read data to ESSI
	46	mov bx, g_rgfnPioRead
[218]	47	call InitializePiovarsInSSBPwithSectorCountInAH
[150]	48	xchg si, di
[169]	49	jmp SHORT ReadFromDrive
[150]	50
	51	ALIGN JUMP_ALIGN
	52	.PrepareToWriteDataFromESSI:
	53	mov bx, g_rgfnPioWrite
[218]	54	call InitializePiovarsInSSBPwithSectorCountInAH
[169]	55	; Fall to WriteToDrive
[150]	56
	57
	58	;--------------------------------------------------------------------
[169]	59	; WriteToDrive
[150]	60	; Parameters:
	61	; DS:DI: Ptr to DPT (in RAMVARS segment)
	62	; ES:SI: Normalized ptr to buffer containing data
	63	; SS:BP: Ptr to PIOVARS
	64	; Returns:
	65	; AH: BIOS Error code
[218]	66	; CX: Number of successfully transferred sectors
[150]	67	; CF: 0 if transfer succesfull
	68	; 1 if any error
	69	; Corrupts registers:
[218]	70	; AL, BX, DX, SI, ES
[150]	71	;--------------------------------------------------------------------
[169]	72	WriteToDrive:
[150]	73	; Always poll when writing first block (IRQs are generated for following blocks)
	74	mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
	75	call IdeWait_PollStatusFlagInBLwithTimeoutInBH
[218]	76	jc SHORT ReturnWithTransferErrorInAH
	77
[150]	78	ALIGN JUMP_ALIGN
[218]	79	.WriteNextBlockToDrive:
	80	mov cx, [bp+PIOVARS.wWordsInBlock]
[150]	81	mov dx, [bp+PIOVARS.wDataPort]
[218]	82	cmp [bp+PIOVARS.wWordsLeft], cx
	83	jbe SHORT .WriteLastBlockToDrive
	84	call [bp+PIOVARS.fnXfer]
[169]	85
[218]	86	; Wait until ready for next block and check for errors
	87	call IdeWait_IRQorDRQ ; Wait until ready to transfer
	88	jc SHORT ReturnWithTransferErrorInAH
[169]	89
[218]	90	; Increment number of successfully written WORDs
	91	mov ax, [bp+PIOVARS.wWordsInBlock]
	92	sub [bp+PIOVARS.wWordsLeft], ax
	93	add [bp+PIOVARS.wWordsDone], ax
	94	jmp SHORT .WriteNextBlockToDrive
[150]	95
	96	ALIGN JUMP_ALIGN
[218]	97	.WriteLastBlockToDrive:
	98	mov cx, [bp+PIOVARS.wWordsLeft]
[150]	99	call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block
	100
[218]	101	; Check for errors in last block
	102	mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY)
	103	call IdeWait_PollStatusFlagInBLwithTimeoutInBH
	104	jmp SHORT ReturnWithTransferErrorInAH
[150]	105
[218]	106
[150]	107	;--------------------------------------------------------------------
[169]	108	; ReadFromDrive
[150]	109	; Parameters:
	110	; ES:DI: Normalized ptr to buffer to recieve data
	111	; DS:SI: Ptr to DPT (in RAMVARS segment)
	112	; SS:BP: Ptr to PIOVARS
	113	; Returns:
	114	; DS:DI: Ptr to DPT (in RAMVARS segment)
	115	; AH: BIOS Error code
[218]	116	; CX: Number of successfully transferred sectors
[150]	117	; CF: 0 if transfer succesfull
	118	; 1 if any error
	119	; Corrupts registers:
[218]	120	; AL, BX, DX, SI, ES
[150]	121	;--------------------------------------------------------------------
	122	ALIGN JUMP_ALIGN
[169]	123	ReadFromDrive:
[150]	124	; Wait until drive is ready to transfer
	125	xchg di, si ; DS:DI now points DPT
	126	call IdeWait_IRQorDRQ ; Wait until ready to transfer
[218]	127	jc SHORT ReturnWithTransferErrorInAH
[150]	128	xchg si, di ; ES:DI now points buffer
	129
[218]	130	ALIGN JUMP_ALIGN
	131	.ReadNextBlockFromDrive:
	132	mov cx, [bp+PIOVARS.wWordsInBlock]
[150]	133	mov dx, [bp+PIOVARS.wDataPort]
[218]	134	cmp [bp+PIOVARS.wWordsLeft], cx
	135	jbe SHORT .ReadLastBlockFromDrive
	136	call [bp+PIOVARS.fnXfer]
[169]	137
[218]	138	; Wait until ready for next block and check for errors
	139	xchg di, si ; DS:DI now points DPT
	140	call IdeWait_IRQorDRQ ; Wait until ready to transfer
	141	jc SHORT ReturnWithTransferErrorInAH
	142	xchg si, di ; ES:DI now points buffer
[150]	143
[218]	144	; Increment number of successfully read WORDs
	145	mov ax, [bp+PIOVARS.wWordsInBlock]
	146	sub [bp+PIOVARS.wWordsLeft], ax
	147	add [bp+PIOVARS.wWordsDone], ax
	148	jmp SHORT .ReadNextBlockFromDrive
[169]	149
[150]	150	ALIGN JUMP_ALIGN
[218]	151	.ReadLastBlockFromDrive:
	152	mov cx, [bp+PIOVARS.wWordsLeft]
[150]	153	call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block
[218]	154
	155	; Check for errors in last block
[150]	156	mov di, si ; DS:DI now points DPT
	157	mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY)
[218]	158	call IdeWait_PollStatusFlagInBLwithTimeoutInBH
[150]	159
[218]	160	; Return number of successfully read sectors
	161	ReturnWithTransferErrorInAH:
	162	mov cx, [bp+PIOVARS.wWordsDone]
	163	jc SHORT .ConvertTransferredWordsInCXtoSectors
	164	add cx, [bp+PIOVARS.wWordsLeft] ; Never sets CF
	165	.ConvertTransferredWordsInCXtoSectors:
	166	xchg cl, ch
	167	ret
[150]	168
[218]	169
[150]	170	;--------------------------------------------------------------------
[218]	171	; InitializePiovarsInSSBPwithSectorCountInAH
[150]	172	; Parameters:
[218]	173	; AH: Number of sectors to transfer (1...128)
[150]	174	; BX: Offset to transfer function lookup table
	175	; DS:DI: Ptr to DPT (in RAMVARS segment)
[169]	176	; SS:BP: Ptr to PIOVARS
[167]	177	; Returns:
[169]	178	; Nothing
[150]	179	; Corrupts registers:
	180	; AX, BX, CX, DX
	181	;--------------------------------------------------------------------
	182	ALIGN JUMP_ALIGN
[218]	183	InitializePiovarsInSSBPwithSectorCountInAH:
	184	; Store sizes
	185	xor al, al
	186	mov [bp+PIOVARS.wWordsLeft], ax
	187	cbw
	188	mov [bp+PIOVARS.wWordsDone], ax ; Zero
	189	mov ah, [di+DPT_ATA.bSetBlock]
	190	mov [bp+PIOVARS.wWordsInBlock], ax
[150]	191
	192	; Get transfer function based on bus type
[158]	193	xchg ax, bx ; Lookup table offset to AX
[150]	194	eMOVZX bx, BYTE [di+DPT.bIdevarsOffset] ; CS:BX now points to IDEVARS
	195	mov dx, [cs:bx+IDEVARS.wPort] ; Load IDE Data port address
	196	mov bl, [cs:bx+IDEVARS.bDevice] ; Load device type to BX
	197	add bx, ax
	198	mov ax, [cs:bx] ; Load offset to transfer function
	199	mov [bp+PIOVARS.wDataPort], dx
	200	mov [bp+PIOVARS.fnXfer], ax
	201	ret
	202
	203
	204	;--------------------------------------------------------------------
[152]	205	; DualByteReadForXtide Dual port 8-bit XTIDE PIO read transfer
	206	; SingleByteRead Single port 8-bit PIO read transfer
	207	; WordReadForXTIDEmod 8088/8086 compatible 16-bit IDE PIO read transfer
	208	; WordReadForXTplusAndAT Normal 16-bit IDE PIO read transfer
	209	; DWordRead VLB/PCI 32-bit IDE PIO read transfer
[150]	210	; Parameters:
	211	; CX: Block size in WORDs
	212	; DX: IDE Data port address
	213	; ES:DI: Normalized ptr to buffer to recieve data
	214	; Returns:
	215	; Nothing
	216	; Corrupts registers:
	217	; AX, BX, CX
	218	;--------------------------------------------------------------------
	219	ALIGN JUMP_ALIGN
[152]	220	DualByteReadForXtide:
[181]	221	eSHR_IM cx, 2 ; Loop unrolling
[152]	222	mov bx, 8 ; Bit mask for toggling data low/high reg
[150]	223	ALIGN JUMP_ALIGN
	224	.InswLoop:
[152]	225	XTIDE_INSW
	226	XTIDE_INSW
	227	XTIDE_INSW
	228	XTIDE_INSW
[150]	229	loop .InswLoop
	230	ret
	231
[152]	232	;----
[150]	233	ALIGN JUMP_ALIGN
	234	SingleByteRead:
	235	%ifdef USE_186 ; INS instruction available
[152]	236	shl cx, 1 ; WORD count to BYTE count
[150]	237	rep insb
	238	%else ; If 8088/8086
[152]	239	shr cx, 1 ; WORD count to DWORD count
[150]	240	ALIGN JUMP_ALIGN
	241	.InsdLoop:
	242	in al, dx
[152]	243	stosb ; Store to [ES:DI]
[150]	244	in al, dx
	245	stosb
	246	in al, dx
	247	stosb
	248	in al, dx
	249	stosb
	250	loop .InsdLoop
	251	%endif
	252	ret
	253
[152]	254	;----
	255	%ifndef USE_186
	256	ALIGN JUMP_ALIGN
	257	WordReadForXTIDEmod:
	258	times 2 shr cx, 1 ; WORD count to QWORD count
	259	ALIGN JUMP_ALIGN
	260	.ReadNextQword:
	261	in ax, dx ; Read 1st WORD
	262	stosw ; Store 1st WORD to [ES:DI]
	263	in ax, dx
	264	stosw ; 2nd
	265	in ax, dx
	266	stosw ; 3rd
	267	in ax, dx
	268	stosw ; 4th
	269	loop .ReadNextQword
	270	ret
	271	%endif
[150]	272
[152]	273	;----
	274	ALIGN JUMP_ALIGN
	275	WordReadForXTplusAndAT:
	276	rep
	277	db 6Dh ; INSW (we want this in XT build)
	278	ret
	279
	280	;----
	281	ALIGN JUMP_ALIGN
	282	DWordRead:
	283	shr cx, 1 ; WORD count to DWORD count
	284	rep
	285	db 66h ; Override operand size to 32-bit
	286	db 6Dh ; INSW/INSD
	287	ret
	288
	289
[150]	290	;--------------------------------------------------------------------
[152]	291	; DualByteWriteForXtide Dual port 8-bit XTIDE PIO write transfer
	292	; SingleByteWrite Single port 8-bit PIO write transfer
	293	; WordWriteForXTIDEmod 8088/8086 compatible 16-bit IDE PIO read transfer
	294	; WordWrite Normal 16-bit IDE PIO write transfer
	295	; DWordWrite VLB/PCI 32-bit IDE PIO write transfer
[150]	296	; Parameters:
	297	; CX: Block size in WORDs
	298	; DX: IDE Data port address
	299	; ES:SI: Normalized ptr to buffer containing data
	300	; Returns:
	301	; Nothing
	302	; Corrupts registers:
	303	; AX, CX
	304	;--------------------------------------------------------------------
	305	ALIGN JUMP_ALIGN
[152]	306	DualByteWriteForXtide:
[150]	307	push ds
	308	push bx
[181]	309	eSHR_IM cx, 2 ; Loop unrolling
[152]	310	mov bx, 8 ; Bit mask for toggling data low/high reg
	311	push es ; Copy ES...
	312	pop ds ; ...to DS
[150]	313	ALIGN JUMP_ALIGN
	314	.OutswLoop:
[152]	315	XTIDE_OUTSW
	316	XTIDE_OUTSW
	317	XTIDE_OUTSW
	318	XTIDE_OUTSW
[150]	319	loop .OutswLoop
	320	pop bx
	321	pop ds
	322	ret
	323
[152]	324	;----
[150]	325	ALIGN JUMP_ALIGN
	326	SingleByteWrite:
	327	%ifdef USE_186 ; OUTS instruction available
[152]	328	shl cx, 1 ; WORD count to BYTE count
[223]	329	es ; Source is ES segment
[150]	330	rep outsb
	331	%else ; If 8088/8086
[152]	332	shr cx, 1 ; WORD count to DWORD count
	333	push ds ; Store DS
	334	push es ; Copy ES...
	335	pop ds ; ...to DS
[150]	336	ALIGN JUMP_ALIGN
	337	.OutsdLoop:
[152]	338	lodsb ; Load from [DS:SI] to AL
[150]	339	out dx, al
	340	lodsb
	341	out dx, al
	342	lodsb
	343	out dx, al
	344	lodsb
	345	out dx, al
	346	loop .OutsdLoop
[152]	347	pop ds ; Restore DS
[150]	348	%endif
	349	ret
	350
[152]	351	;---
	352	ALIGN JUMP_ALIGN
	353	WordWriteForXTIDEmod:
	354	push ds
[181]	355	eSHR_IM cx, 2 ; Loop unrolling
[152]	356	push es ; Copy ES...
	357	pop ds ; ...to DS
	358	ALIGN JUMP_ALIGN
	359	.WriteNextQword:
	360	XTIDE_MOD_OUTSW
	361	XTIDE_MOD_OUTSW
	362	XTIDE_MOD_OUTSW
	363	XTIDE_MOD_OUTSW
	364	loop .WriteNextQword
	365	pop ds
	366	ret
[150]	367
[152]	368	;----
	369	ALIGN JUMP_ALIGN
	370	WordWrite:
[223]	371	es ; Source is ES segment
[152]	372	rep
[155]	373	db 6Fh ; OUTSW (we want this in XT build)
[152]	374	ret
	375
	376	ALIGN JUMP_ALIGN
	377	DWordWrite:
	378	shr cx, 1 ; WORD count to DWORD count
[223]	379	es ; Source is ES segment
[152]	380	rep
	381	db 66h ; Override operand size to 32-bit
	382	db 6Fh ; OUTSW/OUTSD
	383	ret
	384
	385
	386
[150]	387	; Lookup tables to get transfer function based on bus type
	388	ALIGN WORD_ALIGN
	389	g_rgfnPioRead:
[152]	390	dw DualByteReadForXtide ; DEVICE_8BIT_DUAL_PORT_XTIDE
	391	%ifdef USE_186
	392	dw WordReadForXTplusAndAT ; DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0
	393	%else
	394	dw WordReadForXTIDEmod
	395	%endif
	396	dw SingleByteRead ; DEVICE_8BIT_SINGLE_PORT
	397	dw WordReadForXTplusAndAT ; DEVICE_16BIT_ATA
	398	dw DWordRead ; DEVICE_32BIT_ATA
	399
[150]	400	g_rgfnPioWrite:
[152]	401	dw DualByteWriteForXtide ; DEVICE_8BIT_DUAL_PORT_XTIDE
	402	dw WordWriteForXTIDEmod ; DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0
	403	dw SingleByteWrite ; DEVICE_8BIT_SINGLE_PORT
	404	dw WordWrite ; DEVICE_16BIT_ATA
	405	dw DWordWrite ; DEVICE_32BIT_ATA

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