[150] | 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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[376] | 4 | ; |
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[526] | 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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[376] | 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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[526] | 12 | ; |
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[376] | 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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[526] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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[376] | 19 | |
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[150] | 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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[400] | 36 | IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL: |
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[150] | 37 | mov ah, al ; IDE Status Register to AH |
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[267] | 38 | INPUT_TO_AL_FROM_IDE_REGISTER ERROR_REGISTER_in |
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[150] | 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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[267] | 42 | |
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[150] | 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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[566] | 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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[150] | 62 | |
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| 63 | ALIGN JUMP_ALIGN |
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| 64 | .CheckErrorBitsFromStatusRegisterInAL: |
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[566] | 65 | js SHORT .Flg_Status_Bsy ; Jump if FLG_STATUS_BSY |
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[150] | 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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[566] | 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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[150] | 78 | |
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| 79 | .ConvertBiosErrorToAHfromErrorRegisterInAH: |
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[566] | 80 | stc ; Needed in case Error register (AH) is zero |
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| 81 | mov bx, .rgbRetCodeLookup-1 |
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[150] | 82 | .ErrorBitLoop: |
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| 83 | inc bx |
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[566] | 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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[150] | 87 | ret |
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| 88 | |
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[566] | 89 | |
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[150] | 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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