| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Command and port direction functions for different device types.
|
|---|
| 3 |
|
|---|
| 4 | ; Section containing code
|
|---|
| 5 | SECTION .text
|
|---|
| 6 |
|
|---|
| 7 | ;--------------------------------------------------------------------
|
|---|
| 8 | ; Device_FinalizeDPT
|
|---|
| 9 | ; Parameters:
|
|---|
| 10 | ; DS:DI: Ptr to Disk Parameter Table
|
|---|
| 11 | ; ES:SI: Ptr to 512-byte ATA information read from the drive
|
|---|
| 12 | ; Returns:
|
|---|
| 13 | ; Nothing
|
|---|
| 14 | ; Corrupts registers:
|
|---|
| 15 | ; AX, BX, CX, DX
|
|---|
| 16 | ;--------------------------------------------------------------------
|
|---|
| 17 | Device_FinalizeDPT:
|
|---|
| 18 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE
|
|---|
| 19 | jnz SHORT ReturnSuccessForSerialPort
|
|---|
| 20 | jmp IdeDPT_Finalize
|
|---|
| 21 | .FinalizeDptForSerialPortDevice:
|
|---|
| 22 | jmp SerialDPT_Finalize
|
|---|
| 23 |
|
|---|
| 24 |
|
|---|
| 25 | ;--------------------------------------------------------------------
|
|---|
| 26 | ; Device_ResetMasterAndSlaveController
|
|---|
| 27 | ; Parameters:
|
|---|
| 28 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 29 | ; Returns:
|
|---|
| 30 | ; AH: INT 13h Error Code
|
|---|
| 31 | ; CF: Cleared if success, Set if error
|
|---|
| 32 | ; Corrupts registers:
|
|---|
| 33 | ; AL, BX, CX, DX
|
|---|
| 34 | ;--------------------------------------------------------------------
|
|---|
| 35 | Device_ResetMasterAndSlaveController:
|
|---|
| 36 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE
|
|---|
| 37 | jnz SHORT ReturnSuccessForSerialPort
|
|---|
| 38 | jmp IdeCommand_ResetMasterAndSlaveController
|
|---|
| 39 |
|
|---|
| 40 |
|
|---|
| 41 | ;--------------------------------------------------------------------
|
|---|
| 42 | ; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
|
|---|
| 43 | ; Parameters:
|
|---|
| 44 | ; BH: Drive Select byte for Drive and Head Select Register
|
|---|
| 45 | ; DS: Segment to RAMVARS
|
|---|
| 46 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information
|
|---|
| 47 | ; CS:BP: Ptr to IDEVARS
|
|---|
| 48 | ; Returns:
|
|---|
| 49 | ; AH: INT 13h Error Code
|
|---|
| 50 | ; CF: Cleared if success, Set if error
|
|---|
| 51 | ; Corrupts registers:
|
|---|
| 52 | ; AL, BL, CX, DX, SI, DI, ES
|
|---|
| 53 | ;--------------------------------------------------------------------
|
|---|
| 54 | Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
|
|---|
| 55 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_SERIAL_PORT
|
|---|
| 56 | je SHORT .IdentifyDriveFromSerialPort
|
|---|
| 57 | jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
|
|---|
| 58 | .IdentifyDriveFromSerialPort:
|
|---|
| 59 | jmp SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
|
|---|
| 60 |
|
|---|
| 61 |
|
|---|
| 62 | ;--------------------------------------------------------------------
|
|---|
| 63 | ; Device_OutputCommandWithParameters
|
|---|
| 64 | ; Parameters:
|
|---|
| 65 | ; BH: Default system timer ticks for timeout (can be ignored)
|
|---|
| 66 | ; BL: IDE Status Register bit to poll after command
|
|---|
| 67 | ; ES:SI: Ptr to buffer (for data transfer commands)
|
|---|
| 68 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 69 | ; SS:BP: Ptr to IDEPACK
|
|---|
| 70 | ; Returns:
|
|---|
| 71 | ; AH: INT 13h Error Code
|
|---|
| 72 | ; CF: Cleared if success, Set if error
|
|---|
| 73 | ; Corrupts registers:
|
|---|
| 74 | ; AL, BX, CX, DX, (ES:SI for data transfer commands)
|
|---|
| 75 | ;--------------------------------------------------------------------
|
|---|
| 76 | ALIGN JUMP_ALIGN
|
|---|
| 77 | Device_OutputCommandWithParameters:
|
|---|
| 78 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE
|
|---|
| 79 | jnz SHORT .OutputCommandToSerialPort
|
|---|
| 80 | jmp IdeCommand_OutputWithParameters
|
|---|
| 81 | ALIGN JUMP_ALIGN
|
|---|
| 82 | .OutputCommandToSerialPort:
|
|---|
| 83 | jmp SerialCommand_OutputWithParameters
|
|---|
| 84 |
|
|---|
| 85 |
|
|---|
| 86 | ;--------------------------------------------------------------------
|
|---|
| 87 | ; Device_SelectDrive
|
|---|
| 88 | ; Parameters:
|
|---|
| 89 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 90 | ; SS:BP: Ptr to IDEPACK
|
|---|
| 91 | ; Returns:
|
|---|
| 92 | ; AH: INT 13h Error Code
|
|---|
| 93 | ; CF: Cleared if success, Set if error
|
|---|
| 94 | ; Corrupts registers:
|
|---|
| 95 | ; AL, BX, CX, DX
|
|---|
| 96 | ;--------------------------------------------------------------------
|
|---|
| 97 | ALIGN JUMP_ALIGN
|
|---|
| 98 | Device_SelectDrive:
|
|---|
| 99 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE
|
|---|
| 100 | jnz SHORT ReturnSuccessForSerialPort
|
|---|
| 101 | jmp IdeCommand_SelectDrive
|
|---|
| 102 | ReturnSuccessForSerialPort:
|
|---|
| 103 | xor ax, ax
|
|---|
| 104 | ret
|
|---|
| 105 |
|
|---|
| 106 |
|
|---|
| 107 | ;--------------------------------------------------------------------
|
|---|
| 108 | ; Device_OutputALtoIdeRegisterInDL
|
|---|
| 109 | ; Parameters:
|
|---|
| 110 | ; AL: Byte to output
|
|---|
| 111 | ; DL: IDE Register
|
|---|
| 112 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 113 | ; Returns:
|
|---|
| 114 | ; Nothing
|
|---|
| 115 | ; Corrupts registers:
|
|---|
| 116 | ; BX, DX
|
|---|
| 117 | ;--------------------------------------------------------------------
|
|---|
| 118 | ALIGN JUMP_ALIGN
|
|---|
| 119 | Device_OutputALtoIdeRegisterInDL:
|
|---|
| 120 | mov bx, IdeIO_OutputALtoIdeRegisterInDX
|
|---|
| 121 | jmp SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX
|
|---|
| 122 |
|
|---|
| 123 |
|
|---|
| 124 | ;--------------------------------------------------------------------
|
|---|
| 125 | ; Device_OutputALtoIdeControlBlockRegisterInDL
|
|---|
| 126 | ; Parameters:
|
|---|
| 127 | ; AL: Byte to output
|
|---|
| 128 | ; DL: IDE Control Block Register
|
|---|
| 129 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 130 | ; Returns:
|
|---|
| 131 | ; Nothing
|
|---|
| 132 | ; Corrupts registers:
|
|---|
| 133 | ; BX, DX
|
|---|
| 134 | ;--------------------------------------------------------------------
|
|---|
| 135 | ALIGN JUMP_ALIGN
|
|---|
| 136 | Device_OutputALtoIdeControlBlockRegisterInDL:
|
|---|
| 137 | mov bx, IdeIO_OutputALtoIdeControlBlockRegisterInDX
|
|---|
| 138 | jmp SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX
|
|---|
| 139 |
|
|---|
| 140 |
|
|---|
| 141 | ;--------------------------------------------------------------------
|
|---|
| 142 | ; Device_InputToALfromIdeRegisterInDL
|
|---|
| 143 | ; Parameters:
|
|---|
| 144 | ; DL: IDE Register
|
|---|
| 145 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 146 | ; Returns:
|
|---|
| 147 | ; AL: Inputted byte
|
|---|
| 148 | ; Corrupts registers:
|
|---|
| 149 | ; BX, DX
|
|---|
| 150 | ;--------------------------------------------------------------------
|
|---|
| 151 | ALIGN JUMP_ALIGN
|
|---|
| 152 | Device_InputToALfromIdeRegisterInDL:
|
|---|
| 153 | mov bx, IdeIO_InputToALfromIdeRegisterInDX
|
|---|
| 154 | ; Fall to TranslateRegisterAddressInDLifNecessaryThenJumpToBX
|
|---|
| 155 |
|
|---|
| 156 |
|
|---|
| 157 | ;--------------------------------------------------------------------
|
|---|
| 158 | ; TranslateRegisterAddressInDLifNecessaryThenJumpToBX
|
|---|
| 159 | ; Parameters:
|
|---|
| 160 | ; AL: Byte to output (if output function in BX)
|
|---|
| 161 | ; DL: IDE Register
|
|---|
| 162 | ; BX: I/O function to jump to
|
|---|
| 163 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 164 | ; Returns:
|
|---|
| 165 | ; AL: Inputted byte (if input function in BX)
|
|---|
| 166 | ; Corrupts registers:
|
|---|
| 167 | ; BX, DX
|
|---|
| 168 | ;--------------------------------------------------------------------
|
|---|
| 169 | TranslateRegisterAddressInDLifNecessaryThenJumpToBX:
|
|---|
| 170 | test WORD [di+DPT.wFlags], FLG_DPT_REVERSED_A0_AND_A3
|
|---|
| 171 | jz SHORT .JumpToIoFunctionInSI
|
|---|
| 172 |
|
|---|
| 173 | ; Exchange address lines A0 and A3 from DL
|
|---|
| 174 | mov dh, MASK_A3_AND_A0_ADDRESS_LINES
|
|---|
| 175 | and dh, dl ; DH = 0, 1, 8 or 9, we can ignore 0 and 9
|
|---|
| 176 | jz SHORT .JumpToIoFunctionInSI ; Jump out since DH is 0
|
|---|
| 177 | xor dh, MASK_A3_AND_A0_ADDRESS_LINES
|
|---|
| 178 | jz SHORT .JumpToIoFunctionInSI ; Jump out since DH was 9
|
|---|
| 179 | and dl, ~MASK_A3_AND_A0_ADDRESS_LINES
|
|---|
| 180 | or dl, dh ; Address lines now reversed
|
|---|
| 181 |
|
|---|
| 182 | ALIGN JUMP_ALIGN
|
|---|
| 183 | .JumpToIoFunctionInSI:
|
|---|
| 184 | push bx
|
|---|
| 185 | xor dh, dh
|
|---|
| 186 | eMOVZX bx, BYTE [di+DPT.bIdevarsOffset]; CS:BX now points to IDEVARS
|
|---|
| 187 | ret
|
|---|
