source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 493

Last change on this file since 493 was 493, checked in by gregli@…, 12 years ago

Separated MODULE_8BIT_IDE into the basic part used by XTIDE rev 1 and rev 2 which is PIO based, and MODULE_8BIT_IDE_ADVANCED for JRIDE and XTCF support which requires memory mapping and/or DMA. This allows for creating an 8KB image with boot menu support (but no hotkeys) for the XTIDE rev 1. Cleaned up how we reset the drive translation information, ensuring it is properly set between boot attempt on a primary and secondary drive - as a result we clean it when needed, rather than trying to always keep it clean. Also fixed translation bugs in int13h.asm where I had previously missed converting some MODULE_HOTKEYS into MODULE_DRIVEXLATE.
File size: 15.6 KB
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1; Project name : XTIDE Universal BIOS
2; Description : Int 13h BIOS functions (Floppy and Hard disk).
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; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; Int 13h software interrupt handler.
25; This handler changes stack to top of stolen conventional memory
26; and then calls the actual INT 13h handler (Int13h_DiskFunctionsHandler).
27;
28; Int13h_DiskFunctionsHandlerWithStackChange
29; Parameters:
30; AH: Bios function
31; DL: Drive number
32; Other: Depends on function
33; Returns:
34; Depends on function
35;--------------------------------------------------------------------
36%ifdef RELOCATE_INT13H_STACK
37ALIGN JUMP_ALIGN
38Int13h_DiskFunctionsHandlerWithStackChange:
39 push ds
40 push di
41 call RamVars_GetSegmentToDS
42
43 ; Store entry registers to RAMVARS
44 mov [RAMVARS.fpInt13hEntryStack], sp
45 mov [RAMVARS.fpInt13hEntryStack+2], ss
46 pop WORD [RAMVARS.wStackChangeDI]
47 pop WORD [RAMVARS.wStackChangeDS]
48
49 ; Load new stack and restore DS and DI
50 mov di, ds ; We do not want to overwrite DS and DI in stack
51 mov ss, di
52 mov sp, [RAMVARS.wNewStackOffset]
53 lds di, [RAMVARS.dwStackChangeDSDI]
54
55 ; Call INT 13h
56 pushf
57 push cs
58 call Int13h_DiskFunctionsHandler
59
60 ; Restore stack (we must not corrupt FLAGS!)
61 cli
62%ifdef USE_386
63 lss sp, [ss:RAMVARS.fpInt13hEntryStack]
64%else
65 mov sp, [ss:RAMVARS.fpInt13hEntryStack]
66 mov ss, [ss:RAMVARS.fpInt13hEntryStack+2]
67%endif
68 pop di ; DI before stack change
69 pop ds ; DS before stack change
70 retf 2 ; Skip FLAGS from stack
71%endif ; RELOCATE_INT13H_STACK
72
73
74;--------------------------------------------------------------------
75; Int 13h software interrupt handler.
76; Jumps to specific function defined in AH.
77;
78; Note to developers: Do not make recursive INT 13h calls!
79;
80; Int13h_DiskFunctionsHandler
81; Parameters:
82; AH: Bios function
83; DL: Drive number
84; Other: Depends on function
85; Returns:
86; Depends on function
87;--------------------------------------------------------------------
88ALIGN JUMP_ALIGN
89Int13h_DiskFunctionsHandler:
90 sti ; Enable interrupts
91 cld ; String instructions to increment pointers
92 CREATE_FRAME_INTPACK_TO_SSBP SIZE_OF_IDEPACK_WITHOUT_INTPACK
93 call RamVars_GetSegmentToDS
94
95%ifdef MODULE_DRIVEXLATE
96 call DriveXlate_ToOrBack
97 mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
98%endif
99 call FindDPT_ForDriveNumberInDL ; DS:DI points to our DPT, or NULL if not our drive
100 jc SHORT .NotOurDrive ; DPT not found so this is not one of our drives
101
102.OurFunction:
103 ; Jump to correct BIOS function
104 eMOVZX bx, ah
105 eSHL_IM bx, 1
106 cmp ah, 25h ; Possible EBIOS function?
107%ifndef MODULE_EBIOS
108 ja SHORT UnsupportedFunction
109 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
110
111%else ; If using MODULE_EBIOS
112 ja SHORT .JumpToEbiosFunction
113 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
114
115ALIGN JUMP_ALIGN
116.JumpToEbiosFunction:
117 test BYTE [di+DPT.bFlagsLow], FLGL_DPT_LBA_AND_EBIOS_SUPPORTED
118 jz SHORT UnsupportedFunction ; No eINT 13h for CHS drives
119 sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table
120 jb SHORT UnsupportedFunction
121 cmp ah, 48h
122 ja SHORT UnsupportedFunction
123 jmp [cs:bx+g_rgwEbiosFunctionJumpTable]
124%endif ; MODULE_EBIOS
125
126
127ALIGN JUMP_ALIGN
128.NotOurDrive:
129 test ah, ah
130 jz SHORT .OurFunction ; We handle all function 0h requests (resets)
131
132%ifndef MODULE_SERIAL_FLOPPY
133; Without floppy support, we handle only hard disk traffic for function 08h.
134 test dl, dl
135 jns SHORT Int13h_DirectCallToAnotherBios
136%endif
137; With floppy support, we handle all traffic for function 08h, as we need to wrap both hard disk and floppy drive counts.
138 cmp ah, 8
139 je SHORT .OurFunction
140 ; Fall to Int13h_DirectCallToAnotherBios
141
142
143;--------------------------------------------------------------------
144; UnsupportedFunction
145; Int13h_DirectCallToAnotherBios
146; Parameters:
147; DL: Translated drive number
148; DS: RAMVARS segment
149; SS:BP: Ptr to IDEPACK
150; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
151; Other: Function specific INT 13h parameters
152; Returns:
153; Depends on function
154; Corrupts registers:
155; Flags
156;--------------------------------------------------------------------
157ALIGN JUMP_ALIGN
158UnsupportedFunction:
159Int13h_DirectCallToAnotherBios:
160 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
161 mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
162 mov di, [bp+IDEPACK.intpack+INTPACK.di]
163 mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
164 push WORD [bp+IDEPACK.intpack+INTPACK.flags]
165 popf
166 push bp
167 mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
168 int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
169
170 ; Store returned values to INTPACK
171 pop bp ; Standard INT 13h functions never uses BP as return register
172%ifdef USE_386
173; mov [bp+IDEPACK.intpack+INTPACK.gs], gs
174; mov [bp+IDEPACK.intpack+INTPACK.fs], fs
175%endif
176 mov [bp+IDEPACK.intpack+INTPACK.es], es
177 mov [bp+IDEPACK.intpack+INTPACK.ds], ds
178 mov [bp+IDEPACK.intpack+INTPACK.di], di
179 mov [bp+IDEPACK.intpack+INTPACK.si], si
180 mov [bp+IDEPACK.intpack+INTPACK.bx], bx
181%ifdef MODULE_DRIVEXLATE
182 mov [bp+IDEPACK.intpack+INTPACK.dh], dh
183%else
184 mov [bp+IDEPACK.intpack+INTPACK.dx], dx
185%endif
186 mov [bp+IDEPACK.intpack+INTPACK.cx], cx
187 mov [bp+IDEPACK.intpack+INTPACK.ax], ax
188 pushf
189 pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
190 call RamVars_GetSegmentToDS
191
192%ifdef MODULE_DRIVEXLATE
193 cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv] ; DL is still drive number?
194 je SHORT .ExchangeInt13hHandlers
195 mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
196ALIGN JUMP_ALIGN
197.ExchangeInt13hHandlers:
198%endif
199
200%ifdef USE_186
201 push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
202 jmp SHORT ExchangeCurrentInt13hHandlerWithOldInt13hHandler
203%else
204 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
205 jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
206%endif
207
208
209%ifdef MODULE_SERIAL_FLOPPY
210;--------------------------------------------------------------------
211; Int13h_ReturnSuccessForFloppy
212;
213; Some operations, such as format of a floppy disk track, should just
214; return success, while for hard disks it should be treated as unsupported.
215;--------------------------------------------------------------------
216ALIGN JUMP_ALIGN
217Int13h_ReturnSuccessForFloppy:
218 test dl, dl
219 js SHORT UnsupportedFunction
220 xor ah, ah
221 jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
222%endif
223
224
225;--------------------------------------------------------------------
226; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL
227; Parameters:
228; AH: BIOS Error code
229; CL: Number of sectors actually transferred
230; SS:BP: Ptr to IDEPACK
231; Returns:
232; All registers are loaded from INTPACK
233;--------------------------------------------------------------------
234ALIGN JUMP_ALIGN
235Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL:
236 mov [bp+IDEPACK.intpack+INTPACK.al], cl
237 ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
238
239
240;--------------------------------------------------------------------
241; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
242; Int13h_ReturnFromHandlerWithoutStoringErrorCode
243; Parameters:
244; AH: BIOS Error code
245; DS: RAMVARS segment
246; SS:BP: Ptr to IDEPACK
247; Returns:
248; All registers are loaded from INTPACK
249;--------------------------------------------------------------------
250ALIGN JUMP_ALIGN
251Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
252%ifdef MODULE_SERIAL_FLOPPY
253 mov al, [bp+IDEPACK.intpack+INTPACK.dl]
254Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH_ALHasDriveNumber:
255 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber
256
257%else
258 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
259%endif
260
261Int13h_ReturnFromHandlerWithoutStoringErrorCode:
262 ; Always return with interrupts enabled since there are programs that rely
263 ; on INT 13h to enable interrupts.
264 or BYTE [bp+IDEPACK.intpack+INTPACK.flags+1], (FLG_FLAGS_IF>>8)
265 mov sp, bp ; This makes possible to exit anytime, no matter what is on stack
266 RESTORE_FRAME_INTPACK_FROM_SSBP SIZE_OF_IDEPACK_WITHOUT_INTPACK
267
268
269;--------------------------------------------------------------------
270; Int13h_CallPreviousInt13hHandler
271; Parameters:
272; AH: INT 13h function to call
273; DL: Drive number
274; DS: RAMVARS segment
275; Returns:
276; Depends on function
277; NOTE: ES:DI needs to be returned from the previous interrupt
278; handler, for floppy DPT in function 08h
279; Corrupts registers:
280; None
281;--------------------------------------------------------------------
282ALIGN JUMP_ALIGN
283Int13h_CallPreviousInt13hHandler:
284 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
285 int BIOS_DISK_INTERRUPT_13h
286;;; fall-through to ExchangeCurrentInt13hHandlerWithOldInt13hHandler
287
288;--------------------------------------------------------------------
289; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
290; Parameters:
291; DS: RAMVARS segment
292; Returns:
293; Nothing
294; Corrupts registers:
295; Nothing
296; Note: Flags are preserved
297;--------------------------------------------------------------------
298ALIGN JUMP_ALIGN
299ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
300 push es
301 push si
302 LOAD_BDA_SEGMENT_PRESERVE_FLAGS_TO es, si
303 mov si, [RAMVARS.fpOldI13h]
304 cli
305 xchg si, [es:BIOS_DISK_INTERRUPT_13h*4]
306 mov [RAMVARS.fpOldI13h], si
307 mov si, [RAMVARS.fpOldI13h+2]
308 xchg si, [es:BIOS_DISK_INTERRUPT_13h*4+2]
309 sti
310 mov [RAMVARS.fpOldI13h+2], si
311 pop si
312 pop es
313 ret
314
315
316;--------------------------------------------------------------------
317; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
318; Int13h_SetErrorCodeToIntpackInSSBPfromAH
319; Parameters:
320; AH: BIOS error code (00h = no error)
321; SS:BP: Ptr to IDEPACK
322; Returns:
323; SS:BP: Ptr to IDEPACK with error condition set
324; Corrupts registers:
325; DS, DI
326;--------------------------------------------------------------------
327ALIGN JUMP_ALIGN
328%ifdef MODULE_SERIAL_FLOPPY
329Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber:
330 ; Store error code to BDA
331 mov bx, BDA.bHDLastSt
332 test al, al
333 js SHORT .HardDisk
334 mov bl, BDA.bFDRetST & 0xff
335.HardDisk:
336 LOAD_BDA_SEGMENT_TO ds, di
337 mov [bx], ah
338 ; Fall to Int13h_SetErrorCodeToIntpackInSSBPfromAH
339
340%else
341Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
342 ; Store error code to BDA
343 LOAD_BDA_SEGMENT_TO ds, di
344 mov [BDA.bHDLastSt], ah
345 ; Fall to Int13h_SetErrorCodeToIntpackInSSBPfromAH
346%endif
347
348 ; Store error code to INTPACK
349Int13h_SetErrorCodeToIntpackInSSBPfromAH:
350 mov [bp+IDEPACK.intpack+INTPACK.ah], ah
351 test ah, ah
352 jnz SHORT .SetCFtoIntpack
353 and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
354 ret
355.SetCFtoIntpack:
356 or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
357 ret
358
359
360; Jump table for correct BIOS function
361ALIGN WORD_ALIGN
362g_rgw13hFuncJump:
363 dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
364 dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
365 dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
366 dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
367 dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
368%ifdef MODULE_SERIAL_FLOPPY
369 dw Int13h_ReturnSuccessForFloppy ; 05h, Format Disk Track (XT, AT, EISA)
370%else
371 dw UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
372%endif
373 dw UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
374 dw UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
375 dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
376 dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
377 dw UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
378 dw UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
379 dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
380 dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
381 dw UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
382 dw UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
383 dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
384 dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
385 dw UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
386 dw UnsupportedFunction ; 13h, Drive Diagnostic (XT)
387 dw UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
388 dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
389 dw UnsupportedFunction ; 16h,
390 dw UnsupportedFunction ; 17h,
391 dw UnsupportedFunction ; 18h,
392 dw UnsupportedFunction ; 19h, Park Heads (PS/2)
393 dw UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
394 dw UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
395 dw UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
396 dw UnsupportedFunction ; 1Dh,
397%ifdef MODULE_8BIT_IDE_ADVANCED
398 dw AH1Eh_HandlerForXTCFfeatures ; 1Eh, Lo-tech XT-CF features (XTIDE Universal BIOS)
399%else
400 dw UnsupportedFunction ; 1Eh,
401%endif
402 dw UnsupportedFunction ; 1Fh,
403 dw UnsupportedFunction ; 20h,
404 dw UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
405 dw UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
406 dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
407 dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
408 dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
409
410%ifdef MODULE_EBIOS
411g_rgwEbiosFunctionJumpTable:
412 dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
413 dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
414 dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
415 dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
416 dw UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
417 dw UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
418 dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
419 dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
420; dw UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
421; dw UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
422; dw UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
423; dw UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
424; dw UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
425; dw UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
426;
427; * = Enhanced Drive Access Support (minimum required EBIOS functions)
428; ** = Enhanced Disk Drive (EDD) Support
429; *** = Drive Locking and Ejecting Support
430%endif
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