source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/Common/HError.asm@ 31

Last change on this file since 31 was 28, checked in by Tomi Tilli, 14 years ago
  • v1.1.1 broke booting from foreign drives, it is now fixed.
  • Improved error handling a bit.
  • Longer DRQ and IRQ timeouts to minimize write timouts with some (bad) CF cards.
  • Default boot menu drive should now be properly selected.
File size: 5.9 KB
RevLine 
[3]1; File name : HError.asm
2; Project name : IDE BIOS
3; Created date : 30.11.2007
[28]4; Last update : 1.8.2010
[3]5; Author : Tomi Tilli
6; Description : Error checking functions for BIOS Hard disk functions.
7
8; Section containing code
9SECTION .text
10
11;--------------------------------------------------------------------
[28]12; HError_ProcessErrorsAfterPollingTaskFlag
[27]13; Parameters:
[28]14; DS: RAMVARS segment
15; ES: BDA segment (zero)
16; CF: Set if timeout
17; Cleared if task flag was properly set
[27]18; Returns:
[28]19; AH: BIOS error code
20; CF: Set if error
21; Cleared if no error
[27]22; Corrupts registers:
[28]23; AL
[27]24;--------------------------------------------------------------------
25ALIGN JUMP_ALIGN
[28]26HError_ProcessErrorsAfterPollingTaskFlag:
27 jc SHORT HError_ProcessTimeoutAfterPollingBSYandSomeOtherStatusBit
28 mov ax, [es:HDBDA.wHDStAndErr]
29 call GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
30 mov [es:BDA.bHDLastSt], ah
31 mov BYTE [es:BDA.bHDTaskFlg], 0
32 ret
[27]33
34;--------------------------------------------------------------------
[28]35; HError_ProcessTimeoutAfterPollingBSYandSomeOtherStatusBit
36; HError_ProcessErrorsAfterPollingBSY
[3]37; Parameters:
[28]38; DS: RAMVARS segment
[3]39; Returns:
[28]40; AH: BIOS error code
41; CF: Set if error
42; Cleared if no error
[3]43; Corrupts registers:
[28]44; AL
[3]45;--------------------------------------------------------------------
46ALIGN JUMP_ALIGN
[28]47HError_ProcessTimeoutAfterPollingBSYandSomeOtherStatusBit:
48 push ds
49 push dx
[3]50
[28]51 call HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA
52 call GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
53 jc SHORT StoreErrorCodeFromAHtoBDA
54 mov ah, RET_HD_TIMEOUT ; Force timeout since no actual error...
55 stc ; ...but wanted bit was never set
56 jmp SHORT StoreErrorCodeFromAHtoBDA
57
58
59ALIGN JUMP_ALIGN
60HError_ProcessErrorsAfterPollingBSY:
[3]61 push ds
[28]62 push dx
63
64 call HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA
65 call GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
66StoreErrorCodeFromAHtoBDA:
67 mov [BDA.bHDLastSt], ah ; Store BIOS error code to BDA
68
69 pop dx
[3]70 pop ds
[28]71 ret
[3]72
[28]73
[3]74;--------------------------------------------------------------------
[28]75; HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA
[3]76; Parameters:
[28]77; DS: RAMVARS segment
[3]78; Returns:
[28]79; AL: IDE Status Register contents
80; AH: IDE Error Register contents
81; DS: BDA segment
[3]82; Corrupts registers:
[28]83; DX
[3]84;--------------------------------------------------------------------
85ALIGN JUMP_ALIGN
[28]86HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA:
87 mov dx, [RAMVARS.wIdeBase] ; Load IDE base port address
88 inc dx ; Increment to Error Register
89 in al, dx ; Read Error Register...
90 mov ah, al ; ...and copy it to AH
91 add dx, BYTE REGR_IDE_ST - REGR_IDE_ERROR
92 in al, dx ; Read Status Register to AL
93 ; Fall to .StoreStatusAndErrorRegistersFromAXtoBDA
94
95;--------------------------------------------------------------------
96; .StoreStatusAndErrorRegistersFromAXtoBDA
97; Parameters:
98; AL: IDE Status Register contents
99; AH: IDE Error Register contents
100; Returns:
101; DS: BDA segment (zero)
102; Corrupts registers:
103; DX
104;--------------------------------------------------------------------
105.StoreStatusAndErrorRegistersFromAXtoBDA:
106 LOAD_BDA_SEGMENT_TO ds, dx
107 mov [HDBDA.wHDStAndErr], ax
108 ret
109
110
111;--------------------------------------------------------------------
112; GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
113; Parameters:
114; AL: IDE Status Register contents
115; AH: IDE Error Register contents
116; Returns:
117; AH: BIOS INT 13h error code
118; CF: Set if error
119; Cleared if no error
120; Corrupts registers:
121; Nothing
122;--------------------------------------------------------------------
123ALIGN JUMP_ALIGN
124GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX:
[27]125 test al, FLG_IDE_ST_BSY
[28]126 jz SHORT .CheckErrorBitsFromStatusRegisterInAL
127 mov ah, RET_HD_TIMEOUT
128 jmp SHORT .ReturnBiosErrorCodeInAH
129
130ALIGN JUMP_ALIGN
131.CheckErrorBitsFromStatusRegisterInAL:
[3]132 test al, FLG_IDE_ST_DF | FLG_IDE_ST_CORR | FLG_IDE_ST_ERR
[28]133 jnz SHORT .ProcessErrorFromStatusRegisterInAL
[3]134 xor ah, ah ; No errors, zero AH and CF
135 ret
136
[28]137.ProcessErrorFromStatusRegisterInAL:
[3]138 test al, FLG_IDE_ST_ERR ; Error specified in Error register?
[28]139 jnz SHORT .ConvertBiosErrorToAHfromErrorRegisterInAH
[3]140 mov ah, RET_HD_ECC ; Assume ECC corrected error
141 test al, FLG_IDE_ST_CORR ; ECC corrected error?
[28]142 jnz SHORT .ReturnBiosErrorCodeInAH
[3]143 mov ah, RET_HD_CONTROLLER ; Must be Device Fault
[28]144 jmp SHORT .ReturnBiosErrorCodeInAH
[3]145
[28]146.ConvertBiosErrorToAHfromErrorRegisterInAH:
[3]147 push bx
[28]148 mov bx, .rgbRetCodeLookup
149.ErrorBitLoop:
150 rcr ah, 1 ; Set CF if error bit set
151 jc SHORT .LookupErrorCode
152 inc bx
153 cmp bx, .rgbRetCodeLookup + 8
154 jb SHORT .ErrorBitLoop ; Loop until all bits checked
155.LookupErrorCode:
[3]156 mov ah, [cs:bx+.rgbRetCodeLookup]
157 pop bx
[28]158
159.ReturnBiosErrorCodeInAH:
[3]160 stc ; Set CF since error
161 ret
162
163.rgbRetCodeLookup:
164 db RET_HD_ADDRMARK ; Bit0=AMNF, Address Mark Not Found
165 db RET_HD_SEEK_FAIL ; Bit1=TK0NF, Track 0 Not Found
166 db RET_HD_INVALID ; Bit2=ABRT, Aborted Command
167 db RET_HD_NOTLOCKED ; Bit3=MCR, Media Change Requested
168 db RET_HD_NOT_FOUND ; Bit4=IDNF, ID Not Found
169 db RET_HD_LOCKED ; Bit5=MC, Media Changed
170 db RET_HD_UNCORRECC ; Bit6=UNC, Uncorrectable Data Error
171 db RET_HD_BADSECTOR ; Bit7=BBK, Bad Block Detected
[28]172 db RET_HD_STATUSERR ; When Error Register is zero
173
174
175;--------------------------------------------------------------------
176; HError_StoreBiosErrorCodeFromAHtoBDA
177; Parameters:
178; AH: BIOS error code
179; Returns:
180; Nothing
181; Corrupts registers:
182; DI
183;--------------------------------------------------------------------
184ALIGN JUMP_ALIGN
185HError_StoreBiosErrorCodeFromAHtoBDA:
186 push ds
187 mov di, 0 ; Zero DI and preserve FLAGS
188 mov ds, di ; Copy BDA segment to DS
189 mov [BDA.bHDLastSt], ah
190 pop ds
191 ret
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