| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : IDE Device error functions.
|
|---|
| 3 |
|
|---|
| 4 | ; Section containing code
|
|---|
| 5 | SECTION .text
|
|---|
| 6 |
|
|---|
| 7 | ;--------------------------------------------------------------------
|
|---|
| 8 | ; IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| 9 | ; Parameters:
|
|---|
| 10 | ; AL: IDE Status Register contents
|
|---|
| 11 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 12 | ; Returns:
|
|---|
| 13 | ; AH: BIOS error code
|
|---|
| 14 | ; CF: Set if error
|
|---|
| 15 | ; Cleared if no error
|
|---|
| 16 | ; Corrupts registers:
|
|---|
| 17 | ; AL, BX, DX
|
|---|
| 18 | ;--------------------------------------------------------------------
|
|---|
| 19 | ALIGN JUMP_ALIGN
|
|---|
| 20 | IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL:
|
|---|
| 21 | mov ah, al ; IDE Status Register to AH
|
|---|
| 22 | INPUT_TO_AL_FROM_IDE_REGISTER ERROR_REGISTER_in
|
|---|
| 23 | xchg al, ah ; Status Register now in AL, Error Register now in AH
|
|---|
| 24 |
|
|---|
| 25 | ; I don't think anything actually reads these from BDA
|
|---|
| 26 | push ds
|
|---|
| 27 | LOAD_BDA_SEGMENT_TO ds, dx
|
|---|
| 28 | mov [HDBDA.wHDStAndErr], ax
|
|---|
| 29 | pop ds
|
|---|
| 30 |
|
|---|
| 31 | ; Fall to GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
|
|---|
| 32 |
|
|---|
| 33 |
|
|---|
| 34 | ;--------------------------------------------------------------------
|
|---|
| 35 | ; GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
|
|---|
| 36 | ; Parameters:
|
|---|
| 37 | ; AL: IDE Status Register contents
|
|---|
| 38 | ; AH: IDE Error Register contents
|
|---|
| 39 | ; Returns:
|
|---|
| 40 | ; AH: BIOS INT 13h error code
|
|---|
| 41 | ; CF: Set if error
|
|---|
| 42 | ; Cleared if no error
|
|---|
| 43 | ; Corrupts registers:
|
|---|
| 44 | ; BX
|
|---|
| 45 | ;--------------------------------------------------------------------
|
|---|
| 46 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS
|
|---|
| 47 | ALIGN JUMP_ALIGN
|
|---|
| 48 | GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX:
|
|---|
| 49 | test al, FLG_STATUS_BSY
|
|---|
| 50 | jz SHORT .CheckErrorBitsFromStatusRegisterInAL
|
|---|
| 51 | mov ah, RET_HD_TIMEOUT
|
|---|
| 52 | jmp SHORT .ReturnBiosErrorCodeInAH
|
|---|
| 53 |
|
|---|
| 54 | ALIGN JUMP_ALIGN
|
|---|
| 55 | .CheckErrorBitsFromStatusRegisterInAL:
|
|---|
| 56 | test al, FLG_STATUS_DF | FLG_STATUS_CORR | FLG_STATUS_ERR
|
|---|
| 57 | jnz SHORT .ProcessErrorFromStatusRegisterInAL
|
|---|
| 58 | xor ah, ah ; No errors, zero AH and CF
|
|---|
| 59 | ret
|
|---|
| 60 |
|
|---|
| 61 | .ProcessErrorFromStatusRegisterInAL:
|
|---|
| 62 | test al, FLG_STATUS_ERR ; Error specified in Error register?
|
|---|
| 63 | jnz SHORT .ConvertBiosErrorToAHfromErrorRegisterInAH
|
|---|
| 64 | mov ah, RET_HD_ECC ; Assume ECC corrected error
|
|---|
| 65 | test al, FLG_STATUS_CORR ; ECC corrected error?
|
|---|
| 66 | jnz SHORT .ReturnBiosErrorCodeInAH
|
|---|
| 67 | mov ah, RET_HD_CONTROLLER ; Must be Device Fault
|
|---|
| 68 | jmp SHORT .ReturnBiosErrorCodeInAH
|
|---|
| 69 |
|
|---|
| 70 | .ConvertBiosErrorToAHfromErrorRegisterInAH:
|
|---|
| 71 | xor bx, bx ; Clear CF
|
|---|
| 72 | .ErrorBitLoop:
|
|---|
| 73 | rcr ah, 1 ; Set CF if error bit set
|
|---|
| 74 | jc SHORT .LookupErrorCode
|
|---|
| 75 | inc bx
|
|---|
| 76 | test ah, ah ; Clear CF
|
|---|
| 77 | jnz SHORT .ErrorBitLoop
|
|---|
| 78 | .LookupErrorCode:
|
|---|
| 79 | mov ah, [cs:bx+.rgbRetCodeLookup]
|
|---|
| 80 | .ReturnBiosErrorCodeInAH:
|
|---|
| 81 | stc ; Set CF since error
|
|---|
| 82 | ret
|
|---|
| 83 |
|
|---|
| 84 | .rgbRetCodeLookup:
|
|---|
| 85 | db RET_HD_ADDRMARK ; Bit0=AMNF, Address Mark Not Found
|
|---|
| 86 | db RET_HD_SEEK_FAIL ; Bit1=TK0NF, Track 0 Not Found
|
|---|
| 87 | db RET_HD_INVALID ; Bit2=ABRT, Aborted Command
|
|---|
| 88 | db RET_HD_NOTLOCKED ; Bit3=MCR, Media Change Requested
|
|---|
| 89 | db RET_HD_NOT_FOUND ; Bit4=IDNF, ID Not Found
|
|---|
| 90 | db RET_HD_LOCKED ; Bit5=MC, Media Changed
|
|---|
| 91 | db RET_HD_UNCORRECC ; Bit6=UNC, Uncorrectable Data Error
|
|---|
| 92 | db RET_HD_BADSECTOR ; Bit7=BBK, Bad Block Detected
|
|---|
| 93 | db RET_HD_STATUSERR ; When Error Register is zero
|
|---|
| 94 | %endif
|
|---|
