| [150] | 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Command and port direction functions for different device types.
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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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| 8 | ; Device_FinalizeDPT
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| 9 | ; Parameters:
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| 10 | ; DS:DI: Ptr to Disk Parameter Table
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| 11 | ; ES:SI: Ptr to 512-byte ATA information read from the drive
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| 12 | ; Returns:
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| 13 | ; Nothing
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| 14 | ; Corrupts registers:
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| 15 | ; AX, BX, CX, DX
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| 16 | ;--------------------------------------------------------------------
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| 17 | Device_FinalizeDPT:
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| [158] | 18 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| [150] | 19 | jnz SHORT ReturnSuccessForSerialPort
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| 20 | jmp IdeDPT_Finalize
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| 21 | .FinalizeDptForSerialPortDevice:
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| 22 | jmp SerialDPT_Finalize
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| 23 |
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| 24 |
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| 25 | ;--------------------------------------------------------------------
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| 26 | ; Device_ResetMasterAndSlaveController
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| 27 | ; Parameters:
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| 28 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 29 | ; Returns:
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| 30 | ; AH: INT 13h Error Code
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| 31 | ; CF: Cleared if success, Set if error
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| 32 | ; Corrupts registers:
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| 33 | ; AL, BX, CX, DX
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| 34 | ;--------------------------------------------------------------------
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| 35 | Device_ResetMasterAndSlaveController:
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| [158] | 36 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| [150] | 37 | jnz SHORT ReturnSuccessForSerialPort
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| 38 | jmp IdeCommand_ResetMasterAndSlaveController
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| 39 |
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| 40 |
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| 41 | ;--------------------------------------------------------------------
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| 42 | ; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
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| 43 | ; Parameters:
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| 44 | ; BH: Drive Select byte for Drive and Head Select Register
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| 45 | ; DS: Segment to RAMVARS
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| 46 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information
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| 47 | ; CS:BP: Ptr to IDEVARS
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| 48 | ; Returns:
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| 49 | ; AH: INT 13h Error Code
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| 50 | ; CF: Cleared if success, Set if error
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| 51 | ; Corrupts registers:
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| 52 | ; AL, BL, CX, DX, SI, DI, ES
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| 53 | ;--------------------------------------------------------------------
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| 54 | Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
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| 55 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_SERIAL_PORT
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| 56 | je SHORT .IdentifyDriveFromSerialPort
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| 57 | jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 58 | .IdentifyDriveFromSerialPort:
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| 59 | jmp SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 60 |
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| 61 |
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| 62 | ;--------------------------------------------------------------------
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| 63 | ; Device_OutputCommandWithParameters
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| 64 | ; Parameters:
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| 65 | ; BH: Default system timer ticks for timeout (can be ignored)
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| 66 | ; BL: IDE Status Register bit to poll after command
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| 67 | ; ES:SI: Ptr to buffer (for data transfer commands)
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| 68 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 69 | ; SS:BP: Ptr to IDEPACK
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| 70 | ; Returns:
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| 71 | ; AH: INT 13h Error Code
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| 72 | ; CF: Cleared if success, Set if error
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| 73 | ; Corrupts registers:
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| 74 | ; AL, BX, CX, DX, (ES:SI for data transfer commands)
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| 75 | ;--------------------------------------------------------------------
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| 76 | ALIGN JUMP_ALIGN
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| 77 | Device_OutputCommandWithParameters:
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| [158] | 78 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| [150] | 79 | jnz SHORT .OutputCommandToSerialPort
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| 80 | jmp IdeCommand_OutputWithParameters
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| 81 | ALIGN JUMP_ALIGN
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| 82 | .OutputCommandToSerialPort:
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| 83 | jmp SerialCommand_OutputWithParameters
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| 84 |
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| 85 |
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| 86 | ;--------------------------------------------------------------------
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| 87 | ; Device_SelectDrive
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| 88 | ; Parameters:
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| 89 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 90 | ; SS:BP: Ptr to IDEPACK
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| 91 | ; Returns:
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| 92 | ; AH: INT 13h Error Code
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| 93 | ; CF: Cleared if success, Set if error
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| 94 | ; Corrupts registers:
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| 95 | ; AL, BX, CX, DX
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| 96 | ;--------------------------------------------------------------------
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| 97 | ALIGN JUMP_ALIGN
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| 98 | Device_SelectDrive:
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| [158] | 99 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| [150] | 100 | jnz SHORT ReturnSuccessForSerialPort
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| 101 | jmp IdeCommand_SelectDrive
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| 102 | ReturnSuccessForSerialPort:
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| 103 | xor ax, ax
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| 104 | ret
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| 105 |
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| 106 |
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| 107 | ;--------------------------------------------------------------------
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| 108 | ; Device_OutputALtoIdeRegisterInDL
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| 109 | ; Parameters:
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| 110 | ; AL: Byte to output
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| 111 | ; DL: IDE Register
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| 112 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 113 | ; Returns:
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| 114 | ; Nothing
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| 115 | ; Corrupts registers:
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| 116 | ; BX, DX
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| 117 | ;--------------------------------------------------------------------
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| 118 | ALIGN JUMP_ALIGN
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| 119 | Device_OutputALtoIdeRegisterInDL:
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| 120 | mov bx, IdeIO_OutputALtoIdeRegisterInDX
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| 121 | jmp SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX
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| 122 |
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| 123 |
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| 124 | ;--------------------------------------------------------------------
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| 125 | ; Device_OutputALtoIdeControlBlockRegisterInDL
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| 126 | ; Parameters:
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| 127 | ; AL: Byte to output
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| 128 | ; DL: IDE Control Block Register
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| 129 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 130 | ; Returns:
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| 131 | ; Nothing
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| 132 | ; Corrupts registers:
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| 133 | ; BX, DX
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| 134 | ;--------------------------------------------------------------------
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| 135 | ALIGN JUMP_ALIGN
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| 136 | Device_OutputALtoIdeControlBlockRegisterInDL:
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| 137 | mov bx, IdeIO_OutputALtoIdeControlBlockRegisterInDX
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| 138 | jmp SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX
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| 139 |
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| 140 |
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| 141 | ;--------------------------------------------------------------------
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| 142 | ; Device_InputToALfromIdeRegisterInDL
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| 143 | ; Parameters:
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| 144 | ; DL: IDE Register
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| 145 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 146 | ; Returns:
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| 147 | ; AL: Inputted byte
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| 148 | ; Corrupts registers:
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| 149 | ; BX, DX
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| 150 | ;--------------------------------------------------------------------
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| 151 | ALIGN JUMP_ALIGN
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| 152 | Device_InputToALfromIdeRegisterInDL:
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| 153 | mov bx, IdeIO_InputToALfromIdeRegisterInDX
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| 154 | ; Fall to TranslateRegisterAddressInDLifNecessaryThenJumpToBX
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| 155 |
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| 156 |
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| 157 | ;--------------------------------------------------------------------
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| 158 | ; TranslateRegisterAddressInDLifNecessaryThenJumpToBX
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| 159 | ; Parameters:
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| 160 | ; AL: Byte to output (if output function in BX)
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| 161 | ; DL: IDE Register
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| 162 | ; BX: I/O function to jump to
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| 163 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 164 | ; Returns:
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| 165 | ; AL: Inputted byte (if input function in BX)
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| 166 | ; Corrupts registers:
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| 167 | ; BX, DX
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| 168 | ;--------------------------------------------------------------------
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| 169 | TranslateRegisterAddressInDLifNecessaryThenJumpToBX:
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| [158] | 170 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_REVERSED_A0_AND_A3
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| [150] | 171 | jz SHORT .JumpToIoFunctionInSI
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| 172 |
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| 173 | ; Exchange address lines A0 and A3 from DL
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| 174 | mov dh, MASK_A3_AND_A0_ADDRESS_LINES
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| 175 | and dh, dl ; DH = 0, 1, 8 or 9, we can ignore 0 and 9
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| 176 | jz SHORT .JumpToIoFunctionInSI ; Jump out since DH is 0
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| 177 | xor dh, MASK_A3_AND_A0_ADDRESS_LINES
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| 178 | jz SHORT .JumpToIoFunctionInSI ; Jump out since DH was 9
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| 179 | and dl, ~MASK_A3_AND_A0_ADDRESS_LINES
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| 180 | or dl, dh ; Address lines now reversed
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| 181 |
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| 182 | ALIGN JUMP_ALIGN
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| 183 | .JumpToIoFunctionInSI:
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| 184 | push bx
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| 185 | xor dh, dh
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| 186 | eMOVZX bx, BYTE [di+DPT.bIdevarsOffset]; CS:BX now points to IDEVARS
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| 187 | ret
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