source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeTransfer.asm@ 395

Last change on this file since 395 was 376, checked in by gregli@…, 13 years ago

WIDE checkin... Added copyright and license information to sorce files, as per the GPL instructions for usage.

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1; Project name : XTIDE Universal BIOS
2; Description : IDE Device transfer functions.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
7;
8; This program is free software; you can redistribute it and/or modify
9; it under the terms of the GNU General Public License as published by
10; the Free Software Foundation; either version 2 of the License, or
11; (at your option) any later version.
12;
13; This program is distributed in the hope that it will be useful,
14; but WITHOUT ANY WARRANTY; without even the implied warranty of
15; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16; GNU General Public License for more details.
17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
20; Structure containing variables for PIO transfer functions.
21; This struct must not be larger than IDEPACK without INTPACK.
22struc PIOVARS
23 .wDataPort resb 2 ; 0, IDE Data Port
24 .fnXfer resb 2 ; 2, Offset to transfer function
25 .wSectorsInBlock resb 2 ; 4, Block size in sectors
26 .bSectorsLeft resb 1 ; 6, Sectors left to transfer
27 resb 1 ; 7, IDEPACK.bDeviceControl
28 .bSectorsDone resb 1 ; 8, Number of sectors xferred
29endstruc
30
31
32; Section containing code
33SECTION .text
34
35;--------------------------------------------------------------------
36; IdeTransfer_StartWithCommandInAL
37; Parameters:
38; AL: IDE command that was used to start the transfer
39; (all PIO read and write commands including Identify Device)
40; ES:SI: Ptr to normalized data buffer
41; DS:DI: Ptr to DPT (in RAMVARS segment)
42; SS:BP: Ptr to IDEPACK
43; Returns:
44; AH: INT 13h Error Code
45; CX: Number of successfully transferred sectors
46; CF: Cleared if success, Set if error
47; Corrupts registers:
48; AL, BX, DX, SI, ES
49;--------------------------------------------------------------------
50ALIGN JUMP_ALIGN
51IdeTransfer_StartWithCommandInAL:
52 ; Are we reading or writing?
53 test al, 16 ; Bit 4 is cleared on all the read commands but set on 3 of the 4 write commands
54 mov ah, [bp+IDEPACK.bSectorCount]
55 jnz SHORT WriteToDrive
56 cmp al, COMMAND_WRITE_MULTIPLE
57 je SHORT WriteToDrive
58 ; Fall to ReadFromDrive
59
60;--------------------------------------------------------------------
61; ReadFromDrive
62; Parameters:
63; AH: Number of sectors to transfer (1...128)
64; ES:SI: Normalized ptr to buffer to receive data
65; DS:DI: Ptr to DPT (in RAMVARS segment)
66; SS:BP: Ptr to PIOVARS
67; Returns:
68; DS:DI: Ptr to DPT (in RAMVARS segment)
69; AH: BIOS Error code
70; CX: Number of successfully transferred sectors
71; CF: 0 if transfer successful
72; 1 if any error
73; Corrupts registers:
74; AL, BX, DX, SI, ES
75;--------------------------------------------------------------------
76ReadFromDrive:
77 ; Prepare to read data to ESSI
78 mov bx, g_rgfnPioRead
79 call InitializePiovarsInSSBPwithSectorCountInAH
80
81 ; Wait until drive is ready to transfer
82 call IdeWait_IRQorDRQ ; Wait until ready to transfer
83 jc SHORT ReturnWithTransferErrorInAH
84 xchg si, di ; ES:DI now points buffer
85
86 mov cx, [bp+PIOVARS.wSectorsInBlock] ; Max 128
87
88ALIGN JUMP_ALIGN
89.ReadNextBlockFromDrive:
90 mov dx, [bp+PIOVARS.wDataPort]
91 cmp [bp+PIOVARS.bSectorsLeft], cl
92 jbe SHORT .ReadLastBlockFromDrive
93 call [bp+PIOVARS.fnXfer]
94
95 ; Wait until ready for next block and check for errors
96 xchg di, si ; DS:DI now points DPT
97 call IdeWait_IRQorDRQ ; Wait until ready to transfer
98 jc SHORT ReturnWithTransferErrorInAH
99 xchg si, di ; ES:DI now points buffer
100
101 ; Increment number of successfully read sectors
102 mov cx, [bp+PIOVARS.wSectorsInBlock]
103 sub [bp+PIOVARS.bSectorsLeft], cl
104 add [bp+PIOVARS.bSectorsDone], cl
105 jmp SHORT .ReadNextBlockFromDrive
106
107ALIGN JUMP_ALIGN
108.ReadLastBlockFromDrive:
109 mov cl, [bp+PIOVARS.bSectorsLeft] ; CH is already zero
110 call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block
111
112 ; Check for errors in last block
113 mov di, si ; DS:DI now points DPT
114CheckErrorsAfterTransferringLastBlock:
115 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY)
116 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
117
118 ; Return number of successfully read sectors
119ReturnWithTransferErrorInAH:
120%ifdef USE_386
121 movzx cx, [bp+PIOVARS.bSectorsDone]
122%else
123 mov cl, [bp+PIOVARS.bSectorsDone]
124 mov ch, 0 ; Preserve CF
125%endif
126 ret
127
128
129;--------------------------------------------------------------------
130; WriteToDrive
131; Parameters:
132; AH: Number of sectors to transfer (1...128)
133; DS:DI: Ptr to DPT (in RAMVARS segment)
134; ES:SI: Normalized ptr to buffer containing data
135; SS:BP: Ptr to PIOVARS
136; Returns:
137; AH: BIOS Error code
138; CX: Number of successfully transferred sectors
139; CF: 0 if transfer successful
140; 1 if any error
141; Corrupts registers:
142; AL, BX, DX, SI, ES
143;--------------------------------------------------------------------
144ALIGN JUMP_ALIGN
145WriteToDrive:
146 ; Prepare to write data from ESSI
147 mov bx, g_rgfnPioWrite
148 call InitializePiovarsInSSBPwithSectorCountInAH
149
150 ; Always poll when writing first block (IRQs are generated for following blocks)
151 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
152 call IdeWait_PollStatusFlagInBLwithTimeoutInBH
153 jc SHORT ReturnWithTransferErrorInAH
154
155 mov cx, [bp+PIOVARS.wSectorsInBlock] ; Max 128
156
157ALIGN JUMP_ALIGN
158.WriteNextBlockToDrive:
159 mov dx, [bp+PIOVARS.wDataPort]
160 cmp [bp+PIOVARS.bSectorsLeft], cl
161 jbe SHORT .WriteLastBlockToDrive
162 call [bp+PIOVARS.fnXfer]
163
164 ; Wait until ready for next block and check for errors
165 call IdeWait_IRQorDRQ ; Wait until ready to transfer
166 jc SHORT ReturnWithTransferErrorInAH
167
168 ; Increment number of successfully written sectors
169 mov cx, [bp+PIOVARS.wSectorsInBlock]
170 sub [bp+PIOVARS.bSectorsLeft], cl
171 add [bp+PIOVARS.bSectorsDone], cl
172 jmp SHORT .WriteNextBlockToDrive
173
174ALIGN JUMP_ALIGN
175.WriteLastBlockToDrive:
176 mov cl, [bp+PIOVARS.bSectorsLeft] ; CH is already zero
177%ifdef USE_186
178 push CheckErrorsAfterTransferringLastBlock
179 jmp [bp+PIOVARS.fnXfer] ; Transfer possibly partial block
180%else
181 call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block
182 jmp SHORT CheckErrorsAfterTransferringLastBlock
183%endif
184
185
186;--------------------------------------------------------------------
187; InitializePiovarsInSSBPwithSectorCountInAH
188; Parameters:
189; AH: Number of sectors to transfer (1...128)
190; BX: Offset to transfer function lookup table
191; DS:DI: Ptr to DPT (in RAMVARS segment)
192; SS:BP: Ptr to PIOVARS
193; Returns:
194; Nothing
195; Corrupts registers:
196; AX, BX, DX
197;--------------------------------------------------------------------
198ALIGN JUMP_ALIGN
199InitializePiovarsInSSBPwithSectorCountInAH:
200 ; Store sizes
201 mov [bp+PIOVARS.bSectorsLeft], ah
202 eMOVZX ax, [di+DPT_ATA.bBlockSize]
203 mov [bp+PIOVARS.wSectorsInBlock], ax
204 mov [bp+PIOVARS.bSectorsDone], ah ; Zero
205
206 ; Get transfer function based on bus type
207 xchg ax, bx ; Lookup table offset to AX
208 mov bl, [di+DPT.bIdevarsOffset] ; CS:BX now points to IDEVARS
209 mov dx, [cs:bx+IDEVARS.wPort] ; Load IDE Data port address
210%ifdef MODULE_ADVANCED_ATA
211 mov bl, [di+DPT_ADVANCED_ATA.bDevice]
212%else
213 mov bl, [cs:bx+IDEVARS.bDevice] ; Load device type to BX
214%endif
215 add bx, ax
216
217 mov [bp+PIOVARS.wDataPort], dx
218 mov ax, [cs:bx] ; Load offset to transfer function
219 mov [bp+PIOVARS.fnXfer], ax
220 ret
221
222
223;--------------------------------------------------------------------
224; ReadBlockFromXtideRev1 XTIDE rev 1
225; ReadBlockFromXtideRev2 XTIDE rev 2 or rev 1 with swapped A0 and A3 (chuck-mod)
226; ReadBlockFrom16bitDataPort Normal 16-bit IDE
227; ReadBlockFrom32bitDataPort VLB/PCI 32-bit IDE
228; Parameters:
229; CX: Block size in 512 byte sectors
230; DX: IDE Data port address
231; ES:DI: Normalized ptr to buffer to receive data
232; Returns:
233; Nothing
234; Corrupts registers:
235; AX, BX, CX
236;--------------------------------------------------------------------
237ALIGN JUMP_ALIGN
238ReadBlockFromXtideRev1:
239 UNROLL_SECTORS_IN_CX_TO_QWORDS
240 mov bl, 8 ; Bit mask for toggling data low/high reg
241ALIGN JUMP_ALIGN
242.InswLoop:
243 XTIDE_INSW
244 XTIDE_INSW
245 XTIDE_INSW
246 XTIDE_INSW
247 loop .InswLoop
248 ret
249
250;--------------------------------------------------------------------
251%ifndef USE_186 ; 8086/8088 compatible WORD read
252ALIGN JUMP_ALIGN
253ReadBlockFromXtideRev2:
254 UNROLL_SECTORS_IN_CX_TO_QWORDS
255ALIGN JUMP_ALIGN
256.ReadNextQword:
257 in ax, dx ; Read 1st WORD
258 stosw ; Store 1st WORD to [ES:DI]
259 in ax, dx
260 stosw ; 2nd
261 in ax, dx
262 stosw ; 3rd
263 in ax, dx
264 stosw ; 4th
265 loop .ReadNextQword
266 ret
267%endif
268
269;--------------------------------------------------------------------
270ALIGN JUMP_ALIGN
271ReadBlockFrom16bitDataPort:
272 xchg cl, ch ; Sectors to WORDs
273 rep
274 db 6Dh ; INSW (we want this in XT build)
275 ret
276
277;--------------------------------------------------------------------
278ALIGN JUMP_ALIGN
279ReadBlockFrom32bitDataPort:
280 db 0C1h ; SHL
281 db 0E1h ; CX
282 db 7 ; 7 (Sectors to DWORDs)
283 rep
284 db 66h ; Override operand size to 32-bit
285 db 6Dh ; INSW/INSD
286 ret
287
288
289;--------------------------------------------------------------------
290; WriteBlockToXtideRev1 XTIDE rev 1
291; WriteBlockToXtideRev2 XTIDE rev 2 or rev 1 with swapped A0 and A3 (chuck-mod)
292; WriteBlockToFastXtide Fast XTIDE (CPLD v2 project)
293; WriteBlockTo16bitDataPort Normal 16-bit IDE
294; WriteBlockTo32bitDataPort VLB/PCI 32-bit IDE
295; Parameters:
296; CX: Block size in 512-byte sectors
297; DX: IDE Data port address
298; ES:SI: Normalized ptr to buffer containing data
299; Returns:
300; Nothing
301; Corrupts registers:
302; AX, CX
303;--------------------------------------------------------------------
304ALIGN JUMP_ALIGN
305WriteBlockToXtideRev1:
306 push ds
307 push bx
308 UNROLL_SECTORS_IN_CX_TO_QWORDS
309 mov bl, 8 ; Bit mask for toggling data low/high reg
310 push es ; Copy ES...
311 pop ds ; ...to DS
312ALIGN JUMP_ALIGN
313.OutswLoop:
314 XTIDE_OUTSW
315 XTIDE_OUTSW
316 XTIDE_OUTSW
317 XTIDE_OUTSW
318 loop .OutswLoop
319 pop bx
320 pop ds
321 ret
322
323;--------------------------------------------------------------------
324ALIGN JUMP_ALIGN
325WriteBlockToXtideRev2:
326 UNROLL_SECTORS_IN_CX_TO_QWORDS
327 push ds
328 push es ; Copy ES...
329 pop ds ; ...to DS
330ALIGN JUMP_ALIGN
331.WriteNextQword:
332 XTIDE_MOD_OUTSW
333 XTIDE_MOD_OUTSW
334 XTIDE_MOD_OUTSW
335 XTIDE_MOD_OUTSW
336 loop .WriteNextQword
337 pop ds
338 ret
339
340;--------------------------------------------------------------------
341%ifndef USE_186 ; 8086/8088 compatible WORD write
342ALIGN JUMP_ALIGN
343WriteBlockToFastXtide:
344 UNROLL_SECTORS_IN_CX_TO_QWORDS
345 push ds
346 push es
347 pop ds
348ALIGN JUMP_ALIGN
349.ReadNextQword:
350 lodsw ; Load 1st WORD from [DS:SI]
351 out dx, ax ; Write 1st WORD
352 lodsw
353 out dx, ax ; 2nd
354 lodsw
355 out dx, ax ; 3rd
356 lodsw
357 out dx, ax ; 4th
358 loop .ReadNextQword
359 pop ds
360 ret
361%endif
362
363;--------------------------------------------------------------------
364ALIGN JUMP_ALIGN
365WriteBlockTo16bitDataPort:
366 xchg cl, ch ; Sectors to WORDs
367 es ; Source is ES segment
368 rep
369 db 6Fh ; OUTSW (we want this in XT build)
370 ret
371
372;--------------------------------------------------------------------
373ALIGN JUMP_ALIGN
374WriteBlockTo32bitDataPort:
375 db 0C1h ; SHL
376 db 0E1h ; CX
377 db 7 ; 7 (Sectors to DWORDs)
378 es ; Source is ES segment
379 rep
380 db 66h ; Override operand size to 32-bit
381 db 6Fh ; OUTSW/OUTSD
382 ret
383
384
385
386; Lookup tables to get transfer function based on bus type
387ALIGN WORD_ALIGN
388g_rgfnPioRead:
389 dw ReadBlockFromXtideRev1 ; DEVICE_XTIDE_REV1
390%ifdef USE_186
391 dw ReadBlockFrom16bitDataPort ; DEVICE_XTIDE_REV2
392 dw ReadBlockFrom16bitDataPort ; DEVICE_FAST_XTIDE
393%else
394 dw ReadBlockFromXtideRev2 ; DEVICE_XTIDE_REV2
395 dw ReadBlockFromXtideRev2 ; DEVICE_FAST_XTIDE
396%endif
397 dw ReadBlockFrom16bitDataPort ; DEVICE_16BIT_ATA
398 dw ReadBlockFrom32bitDataPort ; DEVICE_32BIT_ATA
399
400g_rgfnPioWrite:
401 dw WriteBlockToXtideRev1 ; DEVICE_XTIDE_REV1
402 dw WriteBlockToXtideRev2 ; DEVICE_XTIDE_REV2
403%ifdef USE_186
404 dw WriteBlockTo16bitDataPort ; DEVICE_FAST_XTIDE
405%else
406 dw WriteBlockToFastXtide ; DEVICE_FAST_XTIDE
407%endif
408 dw WriteBlockTo16bitDataPort ; DEVICE_16BIT_ATA
409 dw WriteBlockTo32bitDataPort ; DEVICE_32BIT_ATA
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