| 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, 2011-2013 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 | IdeError_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 | xchg al, ah ; Status Register now in AL, Error Register now in AH
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| 40 | ; Fall to GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
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| 41 |
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| 42 |
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| 43 | ;--------------------------------------------------------------------
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| 44 | ; GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
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| 45 | ; Parameters:
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| 46 | ; AL: IDE Status Register contents
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| 47 | ; AH: IDE Error Register contents
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| 48 | ; Returns:
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| 49 | ; AH: BIOS INT 13h error code
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| 50 | ; CF: Set if error
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| 51 | ; Cleared if no error
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| 52 | ; Corrupts registers:
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| 53 | ; BX
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| 54 | ;--------------------------------------------------------------------
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| 55 | ALIGN JUMP_ALIGN
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| 56 | GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX:
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| 57 | test al, FLG_STATUS_BSY | FLG_STATUS_DF | FLG_STATUS_CORR | FLG_STATUS_ERR ; Clears CF
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| 58 | jnz SHORT .CheckErrorBitsFromStatusRegisterInAL
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| 59 | ; The MSB of AL (FLG_STATUS_BSY) is cleared at this point.
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| 60 | cbw ; No errors, zero AH (CF already cleared)
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| 61 | ret
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| 62 |
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| 63 | ALIGN JUMP_ALIGN
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| 64 | .CheckErrorBitsFromStatusRegisterInAL:
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| 65 | js SHORT .Flg_Status_Bsy ; Jump if FLG_STATUS_BSY
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| 66 | test al, FLG_STATUS_ERR ; Error specified in Error register?
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| 67 | jnz SHORT .ConvertBiosErrorToAHfromErrorRegisterInAH
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| 68 | mov ah, RET_HD_ECC ; Assume ECC corrected error
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| 69 | test al, FLG_STATUS_CORR ; ECC corrected error?
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| 70 | jnz SHORT .ReturnBiosErrorCodeInAH
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| 71 | mov ah, RET_HD_CONTROLLER ; Must be Device Fault
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| 72 | SKIP2B bx
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| 73 | .Flg_Status_Bsy:
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| 74 | mov ah, RET_HD_TIMEOUT
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| 75 | .ReturnBiosErrorCodeInAH:
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| 76 | stc
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| 77 | ret
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| 78 |
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| 79 | .ConvertBiosErrorToAHfromErrorRegisterInAH:
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| 80 | stc ; Needed in case Error register (AH) is zero
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| 81 | mov bx, .rgbRetCodeLookup-1
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| 82 | .ErrorBitLoop:
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| 83 | inc bx
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| 84 | rcr ah, 1
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| 85 | jnc SHORT .ErrorBitLoop ; CF will be set eventually
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| 86 | mov ah, [cs:bx]
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| 87 | ret
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| 88 |
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| 89 |
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| 90 | .rgbRetCodeLookup:
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| 91 | db RET_HD_ADDRMARK ; Bit0=AMNF, Address Mark Not Found
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| 92 | db RET_HD_SEEK_FAIL ; Bit1=TK0NF, Track 0 Not Found
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| 93 | db RET_HD_INVALID ; Bit2=ABRT, Aborted Command
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| 94 | db RET_HD_NOTLOCKED ; Bit3=MCR, Media Change Requested
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| 95 | db RET_HD_NOT_FOUND ; Bit4=IDNF, ID Not Found
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| 96 | db RET_HD_LOCKED ; Bit5=MC, Media Changed
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| 97 | db RET_HD_UNCORRECC ; Bit6=UNC, Uncorrectable Data Error
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| 98 | db RET_HD_BADSECTOR ; Bit7=BBK, Bad Block Detected
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| 99 | db RET_HD_STATUSERR ; When Error Register is zero
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