source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 532

Last change on this file since 532 was 526, checked in by krille_n_@…, 12 years ago

Changes:

  • Update of the copyright notices to include the year 2013.
File size: 15.9 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, 2011-2013 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 sti ; Enable interrupts
40 ; TODO: Maybe we need to save Flags (DF) as well?
41 push ds ; Save DS:DI on the original stack
42 push di
43 call RamVars_GetSegmentToDS
44
45 ; Store entry registers to RAMVARS
46%ifdef USE_386
47 pop DWORD [RAMVARS.dwStackChangeDSDI]
48%else
49 pop WORD [RAMVARS.wStackChangeDI] ; Pop DS:DI to the top of what
50 pop WORD [RAMVARS.wStackChangeDS] ; is to become the new stack
51%endif
52 mov [RAMVARS.fpInt13hEntryStack], sp
53 mov [RAMVARS.fpInt13hEntryStack+2], ss
54
55 ; Load new stack and restore DS and DI
56 mov di, ds ; We can save 2 bytes by using PUSH/POP but it's slower
57 mov ss, di ; No need to wrap with CLI/STI since this is for AT only (286+)
58 mov sp, RAMVARS.rgbTopOfStack-4
59 pop di ; DI before stack change
60 pop ds ; DS before stack change
61
62 ; Call INT 13h
63 pushf
64 push cs
65 call Int13h_DiskFunctionsHandler
66
67 ; Restore stack (we must not corrupt FLAGS!)
68%ifdef USE_386
69 lss sp, [ss:RAMVARS.fpInt13hEntryStack]
70%else
71 cli
72 mov sp, [ss:RAMVARS.fpInt13hEntryStack]
73 mov ss, [ss:RAMVARS.fpInt13hEntryStack+2]
74 sti
75%endif
76 retf 2 ; Skip FLAGS from stack
77%endif ; RELOCATE_INT13H_STACK
78
79
80;--------------------------------------------------------------------
81; Int 13h software interrupt handler.
82; Jumps to specific function defined in AH.
83;
84; Note to developers: Do not make recursive INT 13h calls!
85;
86; Int13h_DiskFunctionsHandler
87; Parameters:
88; AH: Bios function
89; DL: Drive number
90; Other: Depends on function
91; Returns:
92; Depends on function
93;--------------------------------------------------------------------
94ALIGN JUMP_ALIGN
95Int13h_DiskFunctionsHandler:
96%ifndef RELOCATE_INT13H_STACK
97 sti ; Enable interrupts
98%endif
99 cld ; String instructions to increment pointers
100 CREATE_FRAME_INTPACK_TO_SSBP SIZE_OF_IDEPACK_WITHOUT_INTPACK
101 call RamVars_GetSegmentToDS
102
103%ifdef MODULE_DRIVEXLATE
104 call DriveXlate_ToOrBack
105 mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
106%endif
107 call FindDPT_ForDriveNumberInDL ; DS:DI points to our DPT, or NULL if not our drive
108 jc SHORT .NotOurDrive ; DPT not found so this is not one of our drives
109
110.OurFunction:
111 ; Jump to correct BIOS function
112 eMOVZX bx, ah
113 eSHL_IM bx, 1
114 cmp ah, 25h ; Possible EBIOS function?
115%ifndef MODULE_EBIOS
116 ja SHORT UnsupportedFunction
117 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
118
119%else ; If using MODULE_EBIOS
120 ja SHORT .JumpToEbiosFunction
121 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
122
123ALIGN JUMP_ALIGN
124.JumpToEbiosFunction:
125 test BYTE [di+DPT.bFlagsLow], FLGL_DPT_LBA_AND_EBIOS_SUPPORTED
126 jz SHORT UnsupportedFunction ; No eINT 13h for CHS drives
127 sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table
128 jb SHORT UnsupportedFunction
129 cmp ah, 48h
130 ja SHORT UnsupportedFunction
131 jmp [cs:bx+g_rgwEbiosFunctionJumpTable]
132%endif ; MODULE_EBIOS
133
134
135ALIGN JUMP_ALIGN
136.NotOurDrive:
137 test ah, ah
138 jz SHORT .OurFunction ; We handle all function 0h requests (resets)
139
140%ifndef MODULE_SERIAL_FLOPPY
141; Without floppy support, we handle only hard disk traffic for function 08h.
142 test dl, dl
143 jns SHORT Int13h_DirectCallToAnotherBios
144%endif
145; With floppy support, we handle all traffic for function 08h, as we need to wrap both hard disk and floppy drive counts.
146 cmp ah, 8
147 je SHORT .OurFunction
148 ; Fall to Int13h_DirectCallToAnotherBios
149
150
151;--------------------------------------------------------------------
152; UnsupportedFunction
153; Int13h_DirectCallToAnotherBios
154; Parameters:
155; DL: Translated drive number
156; DS: RAMVARS segment
157; SS:BP: Ptr to IDEPACK
158; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
159; Other: Function specific INT 13h parameters
160; Returns:
161; Depends on function
162; Corrupts registers:
163; Flags
164;--------------------------------------------------------------------
165ALIGN JUMP_ALIGN
166UnsupportedFunction:
167Int13h_DirectCallToAnotherBios:
168 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
169 mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
170 mov di, [bp+IDEPACK.intpack+INTPACK.di]
171 mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
172 push WORD [bp+IDEPACK.intpack+INTPACK.flags]
173 popf
174 push bp
175 mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
176 int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
177
178 ; Store returned values to INTPACK
179 pop bp ; Standard INT 13h functions never uses BP as return register
180%ifdef USE_386
181; mov [bp+IDEPACK.intpack+INTPACK.gs], gs
182; mov [bp+IDEPACK.intpack+INTPACK.fs], fs
183%endif
184 mov [bp+IDEPACK.intpack+INTPACK.es], es
185 mov [bp+IDEPACK.intpack+INTPACK.ds], ds
186 mov [bp+IDEPACK.intpack+INTPACK.di], di
187 mov [bp+IDEPACK.intpack+INTPACK.si], si
188 mov [bp+IDEPACK.intpack+INTPACK.bx], bx
189%ifdef MODULE_DRIVEXLATE
190 mov [bp+IDEPACK.intpack+INTPACK.dh], dh
191%else
192 mov [bp+IDEPACK.intpack+INTPACK.dx], dx
193%endif
194 mov [bp+IDEPACK.intpack+INTPACK.cx], cx
195 mov [bp+IDEPACK.intpack+INTPACK.ax], ax
196 pushf
197 pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
198 call RamVars_GetSegmentToDS
199
200%ifdef MODULE_DRIVEXLATE
201 cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv] ; DL is still drive number?
202 je SHORT .ExchangeInt13hHandlers
203 mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
204ALIGN JUMP_ALIGN
205.ExchangeInt13hHandlers:
206%endif
207
208%ifdef USE_186
209 push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
210 jmp SHORT ExchangeCurrentInt13hHandlerWithOldInt13hHandler
211%else
212 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
213 jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
214%endif
215
216
217%ifdef MODULE_SERIAL_FLOPPY
218;--------------------------------------------------------------------
219; Int13h_ReturnSuccessForFloppy
220;
221; Some operations, such as format of a floppy disk track, should just
222; return success, while for hard disks it should be treated as unsupported.
223;--------------------------------------------------------------------
224ALIGN JUMP_ALIGN
225Int13h_ReturnSuccessForFloppy:
226 test dl, dl
227 js SHORT UnsupportedFunction
228 xor ah, ah
229 jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
230%endif
231
232
233;--------------------------------------------------------------------
234; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL
235; Parameters:
236; AH: BIOS Error code
237; CL: Number of sectors actually transferred
238; SS:BP: Ptr to IDEPACK
239; Returns:
240; All registers are loaded from INTPACK
241;--------------------------------------------------------------------
242ALIGN JUMP_ALIGN
243Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL:
244 mov [bp+IDEPACK.intpack+INTPACK.al], cl
245 ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
246
247
248;--------------------------------------------------------------------
249; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
250; Int13h_ReturnFromHandlerWithoutStoringErrorCode
251; Parameters:
252; AH: BIOS Error code
253; DS: RAMVARS segment
254; SS:BP: Ptr to IDEPACK
255; Returns:
256; All registers are loaded from INTPACK
257;--------------------------------------------------------------------
258ALIGN JUMP_ALIGN
259Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
260%ifdef MODULE_SERIAL_FLOPPY
261 mov al, [bp+IDEPACK.intpack+INTPACK.dl]
262Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH_ALHasDriveNumber:
263 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber
264
265%else
266 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
267%endif
268
269Int13h_ReturnFromHandlerWithoutStoringErrorCode:
270 ; Always return with interrupts enabled since there are programs that rely
271 ; on INT 13h to enable interrupts.
272 or BYTE [bp+IDEPACK.intpack+INTPACK.flags+1], (FLG_FLAGS_IF>>8)
273 mov sp, bp ; This makes possible to exit anytime, no matter what is on stack
274 RESTORE_FRAME_INTPACK_FROM_SSBP SIZE_OF_IDEPACK_WITHOUT_INTPACK
275
276
277;--------------------------------------------------------------------
278; Int13h_CallPreviousInt13hHandler
279; Parameters:
280; AH: INT 13h function to call
281; DL: Drive number
282; DS: RAMVARS segment
283; Returns:
284; Depends on function
285; NOTE: ES:DI needs to be returned from the previous interrupt
286; handler, for floppy DPT in function 08h
287; Corrupts registers:
288; None
289;--------------------------------------------------------------------
290ALIGN JUMP_ALIGN
291Int13h_CallPreviousInt13hHandler:
292 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
293 int BIOS_DISK_INTERRUPT_13h
294;;; fall-through to ExchangeCurrentInt13hHandlerWithOldInt13hHandler
295
296;--------------------------------------------------------------------
297; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
298; Parameters:
299; DS: RAMVARS segment
300; Returns:
301; Nothing
302; Corrupts registers:
303; Nothing
304; Note: Flags are preserved
305;--------------------------------------------------------------------
306ALIGN JUMP_ALIGN
307ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
308 push es
309 push si
310 LOAD_BDA_SEGMENT_PRESERVE_FLAGS_TO es, si
311 mov si, [RAMVARS.fpOldI13h]
312 cli
313 xchg si, [es:BIOS_DISK_INTERRUPT_13h*4]
314 mov [RAMVARS.fpOldI13h], si
315 mov si, [RAMVARS.fpOldI13h+2]
316 xchg si, [es:BIOS_DISK_INTERRUPT_13h*4+2]
317 sti
318 mov [RAMVARS.fpOldI13h+2], si
319 pop si
320 pop es
321 ret
322
323
324;--------------------------------------------------------------------
325; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
326; Int13h_SetErrorCodeToIntpackInSSBPfromAH
327; Parameters:
328; AH: BIOS error code (00h = no error)
329; SS:BP: Ptr to IDEPACK
330; Returns:
331; SS:BP: Ptr to IDEPACK with error condition set
332; Corrupts registers:
333; DS, DI
334;--------------------------------------------------------------------
335ALIGN JUMP_ALIGN
336%ifdef MODULE_SERIAL_FLOPPY
337Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber:
338 ; Store error code to BDA
339 mov bx, BDA.bHDLastSt
340 test al, al
341 js SHORT .HardDisk
342 mov bl, BDA.bFDRetST & 0xff
343.HardDisk:
344 LOAD_BDA_SEGMENT_TO ds, di
345 mov [bx], ah
346 ; Fall to Int13h_SetErrorCodeToIntpackInSSBPfromAH
347
348%else
349Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
350 ; Store error code to BDA
351 LOAD_BDA_SEGMENT_TO ds, di
352 mov [BDA.bHDLastSt], ah
353 ; Fall to Int13h_SetErrorCodeToIntpackInSSBPfromAH
354%endif
355
356 ; Store error code to INTPACK
357Int13h_SetErrorCodeToIntpackInSSBPfromAH:
358 mov [bp+IDEPACK.intpack+INTPACK.ah], ah
359 test ah, ah
360 jnz SHORT .SetCFtoIntpack
361 and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
362 ret
363.SetCFtoIntpack:
364 or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
365 ret
366
367
368; Jump table for correct BIOS function
369ALIGN WORD_ALIGN
370g_rgw13hFuncJump:
371 dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
372 dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
373 dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
374 dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
375 dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
376%ifdef MODULE_SERIAL_FLOPPY
377 dw Int13h_ReturnSuccessForFloppy ; 05h, Format Disk Track (XT, AT, EISA)
378%else
379 dw UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
380%endif
381 dw UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
382 dw UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
383 dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
384 dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
385 dw UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
386 dw UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
387 dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
388 dw AH9h_HandlerForInitializeDriveParameters ; 0Dh, Alternate Disk Reset (All)
389 dw UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
390 dw UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
391 dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
392 dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
393 dw UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
394 dw UnsupportedFunction ; 13h, Drive Diagnostic (XT)
395 dw UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
396 dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
397 dw UnsupportedFunction ; 16h,
398 dw UnsupportedFunction ; 17h,
399 dw UnsupportedFunction ; 18h,
400 dw UnsupportedFunction ; 19h, Park Heads (PS/2)
401 dw UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
402 dw UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
403 dw UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
404 dw UnsupportedFunction ; 1Dh,
405%ifdef MODULE_8BIT_IDE_ADVANCED
406 dw AH1Eh_HandlerForXTCFfeatures ; 1Eh, Lo-tech XT-CF features (XTIDE Universal BIOS)
407%else
408 dw UnsupportedFunction ; 1Eh,
409%endif
410 dw UnsupportedFunction ; 1Fh,
411 dw UnsupportedFunction ; 20h,
412 dw UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
413 dw UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
414 dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
415 dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
416 dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
417
418%ifdef MODULE_EBIOS
419g_rgwEbiosFunctionJumpTable:
420 dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
421 dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
422 dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
423 dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
424 dw UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
425 dw UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
426 dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
427 dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
428; dw UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
429; dw UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
430; dw UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
431; dw UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
432; dw UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
433; dw UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
434;
435; * = Enhanced Drive Access Support (minimum required EBIOS functions)
436; ** = Enhanced Disk Drive (EDD) Support
437; *** = Drive Locking and Ejecting Support
438%endif
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