| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : IDE Device error functions.
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| 3 |
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| 4 | ;
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| 5 | ; XTIDE Universal BIOS and Associated Tools
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
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| 7 | ;
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| 8 | ; This program is free software; you can redistribute it and/or modify
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| 9 | ; it under the terms of the GNU General Public License as published by
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| 10 | ; the Free Software Foundation; either version 2 of the License, or
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| 11 | ; (at your option) any later version.
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| 12 | ;
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| 13 | ; This program is distributed in the hope that it will be useful,
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | ; GNU General Public License for more details.
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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| 18 | ;
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| 19 |
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| 20 | ; Section containing code
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| 21 | SECTION .text
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| 22 |
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| 23 | ;--------------------------------------------------------------------
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| 24 | ; IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
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| 25 | ; Parameters:
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| 26 | ; AL: IDE Status Register contents
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| 27 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 28 | ; Returns:
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| 29 | ; AH: BIOS error code
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| 30 | ; CF: Set if error
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| 31 | ; Cleared if no error
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| 32 | ; Corrupts registers:
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| 33 | ; AL, BX, DX
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| 34 | ;--------------------------------------------------------------------
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| 35 | ALIGN JUMP_ALIGN
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| 36 | IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL:
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| 37 | mov ah, al ; IDE Status Register to AH
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| 38 | INPUT_TO_AL_FROM_IDE_REGISTER ERROR_REGISTER_in
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| 39 |
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| 40 | %ifndef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA
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| 41 | jmp ContinueFromMemIdeError
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| 42 | %else
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| 43 | ContinueFromMemIdeError:
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| 44 | xchg al, ah ; Status Register now in AL, Error Register now in AH
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| 45 |
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| 46 | ; I don't think anything actually reads these from BDA
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| 47 | ;push ds
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| 48 | ;LOAD_BDA_SEGMENT_TO ds, dx
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| 49 | ;mov [HDBDA.wHDStAndErr], ax
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| 50 | ;pop ds
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| 51 |
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| 52 | ; Fall to GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
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| 53 |
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| 54 |
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| 55 | ;--------------------------------------------------------------------
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| 56 | ; GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
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| 57 | ; Parameters:
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| 58 | ; AL: IDE Status Register contents
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| 59 | ; AH: IDE Error Register contents
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| 60 | ; Returns:
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| 61 | ; AH: BIOS INT 13h error code
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| 62 | ; CF: Set if error
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| 63 | ; Cleared if no error
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| 64 | ; Corrupts registers:
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| 65 | ; BX
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| 66 | ;--------------------------------------------------------------------
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| 67 | ALIGN JUMP_ALIGN
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| 68 | GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX:
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| 69 | test al, FLG_STATUS_BSY
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| 70 | jz SHORT .CheckErrorBitsFromStatusRegisterInAL
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| 71 | mov ah, RET_HD_TIMEOUT
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| 72 | jmp SHORT .ReturnBiosErrorCodeInAH
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| 73 |
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| 74 | ALIGN JUMP_ALIGN
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| 75 | .CheckErrorBitsFromStatusRegisterInAL:
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| 76 | test al, FLG_STATUS_DF | FLG_STATUS_CORR | FLG_STATUS_ERR
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| 77 | jnz SHORT .ProcessErrorFromStatusRegisterInAL
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| 78 | xor ah, ah ; No errors, zero AH and CF
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| 79 | ret
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| 80 |
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| 81 | .ProcessErrorFromStatusRegisterInAL:
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| 82 | test al, FLG_STATUS_ERR ; Error specified in Error register?
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| 83 | jnz SHORT .ConvertBiosErrorToAHfromErrorRegisterInAH
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| 84 | mov ah, RET_HD_ECC ; Assume ECC corrected error
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| 85 | test al, FLG_STATUS_CORR ; ECC corrected error?
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| 86 | jnz SHORT .ReturnBiosErrorCodeInAH
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| 87 | mov ah, RET_HD_CONTROLLER ; Must be Device Fault
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| 88 | jmp SHORT .ReturnBiosErrorCodeInAH
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| 89 |
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| 90 | .ConvertBiosErrorToAHfromErrorRegisterInAH:
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| 91 | xor bx, bx ; Clear CF
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| 92 | .ErrorBitLoop:
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| 93 | rcr ah, 1 ; Set CF if error bit set
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| 94 | jc SHORT .LookupErrorCode
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| 95 | inc bx
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| 96 | test ah, ah ; Clear CF
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| 97 | jnz SHORT .ErrorBitLoop
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| 98 | .LookupErrorCode:
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| 99 | mov ah, [cs:bx+.rgbRetCodeLookup]
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| 100 | .ReturnBiosErrorCodeInAH:
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| 101 | stc ; Set CF since error
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| 102 | ret
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| 103 |
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| 104 | .rgbRetCodeLookup:
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| 105 | db RET_HD_ADDRMARK ; Bit0=AMNF, Address Mark Not Found
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| 106 | db RET_HD_SEEK_FAIL ; Bit1=TK0NF, Track 0 Not Found
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| 107 | db RET_HD_INVALID ; Bit2=ABRT, Aborted Command
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| 108 | db RET_HD_NOTLOCKED ; Bit3=MCR, Media Change Requested
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| 109 | db RET_HD_NOT_FOUND ; Bit4=IDNF, ID Not Found
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| 110 | db RET_HD_LOCKED ; Bit5=MC, Media Changed
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| 111 | db RET_HD_UNCORRECC ; Bit6=UNC, Uncorrectable Data Error
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| 112 | db RET_HD_BADSECTOR ; Bit7=BBK, Bad Block Detected
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| 113 | db RET_HD_STATUSERR ; When Error Register is zero
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| 114 | %endif
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