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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdePioBlock.asm@ 561

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Last change on this file since 561 was 558, checked in by krille_n_@…, 11 years ago

Changes:

Building the BIOS Drive Information Tool now works again.
Moved all XT-CF related code to MODULE_8BIT_IDE_ADVANCED. I don't see how an XT-CF card could work without *_ADVANCED anyway but if I'm wrong, feel free to undo this. Note! The autodetection code in XTIDECFG has NOT been changed to reflect this (still relies on MODULE_8BIT_IDE).
Optimizations and fixes in general.

File size: 7.4 KB

Rev	Line
[473]	1	; Project name : XTIDE Universal BIOS
[558]	2	; Description : IDE Read/Write functions for transferring block using PIO modes.
[473]	3	; These functions should only be called from IdeTransfer.asm.
	4
	5	;
	6	; XTIDE Universal BIOS and Associated Tools
[526]	7	; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
[473]	8	;
	9	; This program is free software; you can redistribute it and/or modify
	10	; it under the terms of the GNU General Public License as published by
	11	; the Free Software Foundation; either version 2 of the License, or
	12	; (at your option) any later version.
	13	;
	14	; This program is distributed in the hope that it will be useful,
	15	; but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	; GNU General Public License for more details.
	18	; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
	19	;
	20
[545]	21	; Modified by JJP for XT-CFv3 support, Mar-13
	22
[473]	23	; Section containing code
	24	SECTION .text
	25
[545]	26
	27	; --------------------------------------------------------------------------------------------------
	28	;
	29	; READ routines follow
	30	;
	31	; --------------------------------------------------------------------------------------------------
	32
	33
[473]	34	%ifdef MODULE_8BIT_IDE
	35
	36	;--------------------------------------------------------------------
	37	; IdePioBlock_ReadFromXtideRev1
	38	; Parameters:
	39	; CX: Block size in 512 byte sectors
	40	; DX: IDE Data port address
	41	; ES:DI: Normalized ptr to buffer to receive data
	42	; Returns:
	43	; Nothing
	44	; Corrupts registers:
	45	; AX, BX, CX
	46	;--------------------------------------------------------------------
	47	ALIGN JUMP_ALIGN
	48	IdePioBlock_ReadFromXtideRev1:
	49	UNROLL_SECTORS_IN_CX_TO_OWORDS
	50	mov bl, 8 ; Bit mask for toggling data low/high reg
	51	ALIGN JUMP_ALIGN
	52	.InswLoop:
	53	%rep 8 ; WORDs
	54	XTIDE_INSW
	55	%endrep
	56	loop .InswLoop
	57	ret
	58
	59
	60	;--------------------------------------------------------------------
[545]	61	; IdePioBlock_ReadFrom8bitDataPort
	62	;
	63	; 8-bit PIO from a single data port.
	64	;
[473]	65	; Parameters:
[558]	66	; CX: Block size in 512 byte sectors
	67	; DX: IDE Data port address
[473]	68	; ES:DI: Normalized ptr to buffer to receive data
	69	; Returns:
	70	; Nothing
	71	; Corrupts registers:
	72	; AX, BX, CX
	73	;--------------------------------------------------------------------
	74	ALIGN JUMP_ALIGN
[545]	75	IdePioBlock_ReadFrom8bitDataPort:
	76	%ifdef USE_186
	77	shl cx, 9 ; Sectors to BYTEs
	78	rep insb
	79	ret
	80	%else ; If 8088/8086
[473]	81	UNROLL_SECTORS_IN_CX_TO_OWORDS
	82	ALIGN JUMP_ALIGN
	83	.ReadNextOword:
[545]	84	%rep 16 ; BYTEs
	85	in al, dx ; Read BYTE
	86	stosb ; Store BYTE to [ES:DI]
[473]	87	%endrep
[545]	88	loop .ReadNextOword
	89	ret
[473]	90	%endif
	91
[545]	92	%endif ; MODULE_8BIT_IDE
[473]	93
[545]	94
[473]	95	;--------------------------------------------------------------------
[545]	96	; IdePioBlock_ReadFrom16bitDataPort
	97	;
	98	; 16-bit PIO from a single data port.
	99	;
[473]	100	; Parameters:
[558]	101	; CX: Block size in 512 byte sectors
	102	; DX: IDE Data port address
[473]	103	; ES:DI: Normalized ptr to buffer to receive data
	104	; Returns:
	105	; Nothing
	106	; Corrupts registers:
	107	; AX, BX, CX
	108	;--------------------------------------------------------------------
	109	ALIGN JUMP_ALIGN
[545]	110	IdePioBlock_ReadFrom16bitDataPort:
[473]	111	%ifdef USE_186
[558]	112	xchg cl, ch ; Sectors to WORDs
[545]	113	rep insw
[473]	114	ret
	115
	116	%else ; If 8088/8086
	117	UNROLL_SECTORS_IN_CX_TO_OWORDS
	118	ALIGN JUMP_ALIGN
	119	.ReadNextOword:
[545]	120	%rep 8 ; WORDs
[558]	121	in ax, dx ; Read WORD
	122	stosw ; Store WORD to [ES:DI]
[473]	123	%endrep
	124	loop .ReadNextOword
	125	ret
	126	%endif
	127
	128
	129	;--------------------------------------------------------------------
[545]	130	ALIGN JUMP_ALIGN
	131	IdePioBlock_ReadFrom32bitDataPort:
	132	db 0C1h ; SHL
	133	db 0E1h ; CX
	134	db 7 ; 7 (Sectors to DWORDs)
	135	rep
	136	db 66h ; Override operand size to 32-bit
	137	db 6Dh ; INSW/INSD
	138	ret
	139
	140
	141
	142	; --------------------------------------------------------------------------------------------------
	143	;
	144	; WRITE routines follow
	145	;
	146	; --------------------------------------------------------------------------------------------------
	147
	148	%ifdef MODULE_8BIT_IDE
	149
	150	;--------------------------------------------------------------------
[473]	151	; IdePioBlock_WriteToXtideRev1
	152	; Parameters:
[558]	153	; CX: Block size in 512-byte sectors
	154	; DX: IDE Data port address
[473]	155	; ES:SI: Normalized ptr to buffer containing data
	156	; Returns:
	157	; Nothing
	158	; Corrupts registers:
	159	; AX, BX, CX, DX
	160	;--------------------------------------------------------------------
	161	ALIGN JUMP_ALIGN
	162	IdePioBlock_WriteToXtideRev1:
	163	push ds
	164	UNROLL_SECTORS_IN_CX_TO_QWORDS
	165	mov bl, 8 ; Bit mask for toggling data low/high reg
	166	push es ; Copy ES...
	167	pop ds ; ...to DS
	168	ALIGN JUMP_ALIGN
	169	.OutswLoop:
	170	%rep 4 ; WORDs
	171	XTIDE_OUTSW
	172	%endrep
	173	loop .OutswLoop
	174	pop ds
	175	ret
	176
	177
	178	;--------------------------------------------------------------------
	179	; IdePioBlock_WriteToXtideRev2 or rev 1 with swapped A0 and A3 (chuck-mod)
	180	; Parameters:
[558]	181	; CX: Block size in 512-byte sectors
	182	; DX: IDE Data port address
[473]	183	; ES:SI: Normalized ptr to buffer containing data
	184	; Returns:
	185	; Nothing
	186	; Corrupts registers:
	187	; AX, BX, CX, DX
	188	;--------------------------------------------------------------------
	189	ALIGN JUMP_ALIGN
	190	IdePioBlock_WriteToXtideRev2:
	191	UNROLL_SECTORS_IN_CX_TO_QWORDS
[558]	192	push ds
	193	push es ; Copy ES...
	194	pop ds ; ...to DS
[473]	195	ALIGN JUMP_ALIGN
	196	.WriteNextQword:
	197	%rep 4 ; WORDs
[545]	198	XTIDE_MOD_OUTSW ; special macro
[473]	199	%endrep
	200	loop .WriteNextQword
	201	pop ds
	202	ret
	203
	204
	205	;--------------------------------------------------------------------
[545]	206	; IdePioBlock_WriteTo8bitDataPort
[473]	207	; Parameters:
[558]	208	; CX: Block size in 512-byte sectors
	209	; DX: IDE Data port address
[473]	210	; ES:SI: Normalized ptr to buffer containing data
	211	; Returns:
	212	; Nothing
	213	; Corrupts registers:
	214	; AX, BX, CX, DX
	215	;--------------------------------------------------------------------
	216	ALIGN JUMP_ALIGN
	217	IdePioBlock_WriteTo8bitDataPort:
	218	%ifdef USE_186
	219	shl cx, 9 ; Sectors to BYTEs
	220	es ; Source is ES segment
	221	rep outsb
	222	ret
	223
	224	%else ; If 8088/8086
[545]	225	UNROLL_SECTORS_IN_CX_TO_QWORDS
[558]	226	push ds
	227	;mov ax, es
	228	;mov ds, ax ; move es to ds via ax (does this run faster on 8088?)
	229	push es
	230	pop ds
[473]	231	ALIGN JUMP_ALIGN
[545]	232	.WriteNextQword:
	233	%rep 8 ; BYTEs
	234	lodsb ; Load BYTE from [DS:SI]
	235	out dx, al ; Write BYTE
[473]	236	%endrep
[545]	237	loop .WriteNextQword
[473]	238	pop ds
	239	ret
	240	%endif
	241
	242	%endif ; MODULE_8BIT_IDE
	243
	244
	245	;--------------------------------------------------------------------
[545]	246	; IdePioBlock_WriteTo16bitDataPort Normal 16-bit IDE, XT-CFv3 in BIU Mode
[473]	247	; IdePioBlock_WriteTo32bitDataPort VLB/PCI 32-bit IDE
	248	; Parameters:
[558]	249	; CX: Block size in 512-byte sectors
	250	; DX: IDE Data port address
[473]	251	; ES:SI: Normalized ptr to buffer containing data
	252	; Returns:
	253	; Nothing
	254	; Corrupts registers:
	255	; AX, BX, CX, DX
	256	;--------------------------------------------------------------------
	257	ALIGN JUMP_ALIGN
	258	IdePioBlock_WriteTo16bitDataPort:
[545]	259	%ifdef USE_186
[473]	260	xchg cl, ch ; Sectors to WORDs
	261	es ; Source is ES segment
[545]	262	rep outsw
[473]	263	ret
	264
[545]	265	%else ; If 8088/8086
	266	UNROLL_SECTORS_IN_CX_TO_QWORDS
	267	push ds
	268	;mov ax, es
	269	;mov ds, ax ; move es to ds via ax (does this run faster on 8088?)
	270	push es
	271	pop ds
	272	ALIGN JUMP_ALIGN
	273	.WriteNextQword:
	274	%rep 4 ; WORDs
[558]	275	lodsw ; Load WORD from [DS:SI]
	276	out dx, ax ; Write WORD
[545]	277	%endrep
	278	loop .WriteNextQword
	279	pop ds
	280	ret
	281	%endif ; if/else USE_186
	282
[473]	283	;--------------------------------------------------------------------
	284	ALIGN JUMP_ALIGN
	285	IdePioBlock_WriteTo32bitDataPort:
[480]	286	db 0C1h ; SHL
	287	db 0E1h ; CX
	288	db 7 ; 7 (Sectors to DWORDs)
[473]	289	es ; Source is ES segment
	290	rep
	291	db 66h ; Override operand size to 32-bit
	292	db 6Fh ; OUTSW/OUTSD
	293	ret

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