[148] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Error checking functions for BIOS Hard disk functions. |
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| 3 | |
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| 4 | ; Section containing code |
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| 5 | SECTION .text |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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[148] | 8 | ; HError_GetErrorCodeToAHforTimeoutWhenPolling |
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[3] | 9 | ; Parameters: |
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[28] | 10 | ; DS: RAMVARS segment |
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[3] | 11 | ; Returns: |
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[28] | 12 | ; AH: BIOS error code |
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| 13 | ; CF: Set if error |
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| 14 | ; Cleared if no error |
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[3] | 15 | ; Corrupts registers: |
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[28] | 16 | ; AL |
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[3] | 17 | ;-------------------------------------------------------------------- |
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| 18 | ALIGN JUMP_ALIGN |
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[148] | 19 | HError_GetErrorCodeToAHforTimeoutWhenPolling: |
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| 20 | call HError_GetErrorCodeToAHafterPolling |
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[35] | 21 | jc SHORT .ReturnErrorCodeInAH |
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[28] | 22 | mov ah, RET_HD_TIMEOUT ; Force timeout since no actual error... |
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| 23 | stc ; ...but wanted bit was never set |
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[35] | 24 | .ReturnErrorCodeInAH: |
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| 25 | ret |
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[28] | 26 | |
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| 27 | |
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[148] | 28 | ;-------------------------------------------------------------------- |
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| 29 | ; HError_GetErrorCodeToAHafterPolling |
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| 30 | ; Parameters: |
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| 31 | ; DS: RAMVARS segment |
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| 32 | ; Returns: |
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| 33 | ; AH: BIOS error code |
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| 34 | ; CF: Set if error |
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| 35 | ; Cleared if no error |
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| 36 | ; Corrupts registers: |
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| 37 | ; AL |
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| 38 | ;-------------------------------------------------------------------- |
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[28] | 39 | ALIGN JUMP_ALIGN |
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[148] | 40 | HError_GetErrorCodeToAHafterPolling: |
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[86] | 41 | %ifndef USE_186 |
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[28] | 42 | call HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA |
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[35] | 43 | jmp SHORT GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX |
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[86] | 44 | %else |
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| 45 | push GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX |
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| 46 | ; Fall through to HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA |
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| 47 | %endif |
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[28] | 48 | |
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[3] | 49 | |
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| 50 | ;-------------------------------------------------------------------- |
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[28] | 51 | ; HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA |
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[3] | 52 | ; Parameters: |
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[28] | 53 | ; DS: RAMVARS segment |
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[3] | 54 | ; Returns: |
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[28] | 55 | ; AL: IDE Status Register contents |
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| 56 | ; AH: IDE Error Register contents |
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[3] | 57 | ; Corrupts registers: |
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[35] | 58 | ; Nothing |
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[3] | 59 | ;-------------------------------------------------------------------- |
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| 60 | ALIGN JUMP_ALIGN |
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[28] | 61 | HError_GetStatusAndErrorRegistersToAXandStoreThemToBDA: |
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[35] | 62 | push ds |
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| 63 | push dx |
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| 64 | |
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[28] | 65 | mov dx, [RAMVARS.wIdeBase] ; Load IDE base port address |
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| 66 | inc dx ; Increment to Error Register |
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| 67 | in al, dx ; Read Error Register... |
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| 68 | mov ah, al ; ...and copy it to AH |
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| 69 | add dx, BYTE REGR_IDE_ST - REGR_IDE_ERROR |
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| 70 | in al, dx ; Read Status Register to AL |
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| 71 | |
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| 72 | LOAD_BDA_SEGMENT_TO ds, dx |
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| 73 | mov [HDBDA.wHDStAndErr], ax |
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[35] | 74 | |
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| 75 | pop dx |
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| 76 | pop ds |
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[28] | 77 | ret |
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| 78 | |
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| 79 | |
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| 80 | ;-------------------------------------------------------------------- |
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| 81 | ; GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX |
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| 82 | ; Parameters: |
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| 83 | ; AL: IDE Status Register contents |
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| 84 | ; AH: IDE Error Register contents |
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| 85 | ; Returns: |
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| 86 | ; AH: BIOS INT 13h error code |
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| 87 | ; CF: Set if error |
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| 88 | ; Cleared if no error |
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| 89 | ; Corrupts registers: |
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| 90 | ; Nothing |
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| 91 | ;-------------------------------------------------------------------- |
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| 92 | ALIGN JUMP_ALIGN |
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| 93 | GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX: |
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[27] | 94 | test al, FLG_IDE_ST_BSY |
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[28] | 95 | jz SHORT .CheckErrorBitsFromStatusRegisterInAL |
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| 96 | mov ah, RET_HD_TIMEOUT |
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| 97 | jmp SHORT .ReturnBiosErrorCodeInAH |
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| 98 | |
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| 99 | ALIGN JUMP_ALIGN |
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| 100 | .CheckErrorBitsFromStatusRegisterInAL: |
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[3] | 101 | test al, FLG_IDE_ST_DF | FLG_IDE_ST_CORR | FLG_IDE_ST_ERR |
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[28] | 102 | jnz SHORT .ProcessErrorFromStatusRegisterInAL |
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[3] | 103 | xor ah, ah ; No errors, zero AH and CF |
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| 104 | ret |
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| 105 | |
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[28] | 106 | .ProcessErrorFromStatusRegisterInAL: |
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[3] | 107 | test al, FLG_IDE_ST_ERR ; Error specified in Error register? |
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[28] | 108 | jnz SHORT .ConvertBiosErrorToAHfromErrorRegisterInAH |
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[3] | 109 | mov ah, RET_HD_ECC ; Assume ECC corrected error |
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| 110 | test al, FLG_IDE_ST_CORR ; ECC corrected error? |
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[28] | 111 | jnz SHORT .ReturnBiosErrorCodeInAH |
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[3] | 112 | mov ah, RET_HD_CONTROLLER ; Must be Device Fault |
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[28] | 113 | jmp SHORT .ReturnBiosErrorCodeInAH |
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[3] | 114 | |
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[28] | 115 | .ConvertBiosErrorToAHfromErrorRegisterInAH: |
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[3] | 116 | push bx |
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[28] | 117 | mov bx, .rgbRetCodeLookup |
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| 118 | .ErrorBitLoop: |
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| 119 | rcr ah, 1 ; Set CF if error bit set |
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| 120 | jc SHORT .LookupErrorCode |
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| 121 | inc bx |
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| 122 | cmp bx, .rgbRetCodeLookup + 8 |
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| 123 | jb SHORT .ErrorBitLoop ; Loop until all bits checked |
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| 124 | .LookupErrorCode: |
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[3] | 125 | mov ah, [cs:bx+.rgbRetCodeLookup] |
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| 126 | pop bx |
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[28] | 127 | |
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| 128 | .ReturnBiosErrorCodeInAH: |
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[3] | 129 | stc ; Set CF since error |
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| 130 | ret |
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| 131 | |
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| 132 | .rgbRetCodeLookup: |
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| 133 | db RET_HD_ADDRMARK ; Bit0=AMNF, Address Mark Not Found |
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| 134 | db RET_HD_SEEK_FAIL ; Bit1=TK0NF, Track 0 Not Found |
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| 135 | db RET_HD_INVALID ; Bit2=ABRT, Aborted Command |
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| 136 | db RET_HD_NOTLOCKED ; Bit3=MCR, Media Change Requested |
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| 137 | db RET_HD_NOT_FOUND ; Bit4=IDNF, ID Not Found |
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| 138 | db RET_HD_LOCKED ; Bit5=MC, Media Changed |
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| 139 | db RET_HD_UNCORRECC ; Bit6=UNC, Uncorrectable Data Error |
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| 140 | db RET_HD_BADSECTOR ; Bit7=BBK, Bad Block Detected |
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[28] | 141 | db RET_HD_STATUSERR ; When Error Register is zero |
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[148] | 142 | |
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| 143 | |
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| 144 | ;-------------------------------------------------------------------- |
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| 145 | ; HError_SetErrorCodeToBdaAndToIntpackInSSBPfromAH |
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| 146 | ; HError_SetErrorCodeToIntpackInSSBPfromAH |
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| 147 | ; Parameters: |
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| 148 | ; AH: BIOS error code (00h = no error) |
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| 149 | ; SS:BP: Ptr to INTPACK |
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| 150 | ; Returns: |
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| 151 | ; SS:BP: Ptr to INTPACK with error condition set |
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| 152 | ; Corrupts registers: |
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| 153 | ; DS, DI |
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| 154 | ;-------------------------------------------------------------------- |
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| 155 | ALIGN JUMP_ALIGN |
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| 156 | HError_SetErrorCodeToBdaAndToIntpackInSSBPfromAH: |
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| 157 | ; Store error code to BDA |
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| 158 | LOAD_BDA_SEGMENT_TO ds, di |
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| 159 | mov [BDA.bHDLastSt], ah |
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| 160 | |
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| 161 | ; Store error code to INTPACK |
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| 162 | HError_SetErrorCodeToIntpackInSSBPfromAH: |
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| 163 | mov [bp+INTPACK.ah], ah |
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| 164 | test ah, ah |
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| 165 | jnz SHORT .SetCFtoIntpack |
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| 166 | and BYTE [bp+INTPACK.flags], ~FLG_FLAGS_CF |
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| 167 | ret |
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| 168 | .SetCFtoIntpack: |
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| 169 | or BYTE [bp+INTPACK.flags], FLG_FLAGS_CF |
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| 170 | ret |
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