[150] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : IDE Device transfer functions. |
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| 3 | |
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| 4 | ; Structure containing variables for PIO transfer functions. |
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| 5 | ; This struct must not be larger than IDEPACK without INTPACK. |
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| 6 | struc PIOVARS |
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[363] | 7 | .wDataPort resb 2 ; 0, IDE Data Port |
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| 8 | .fnXfer resb 2 ; 2, Offset to transfer function |
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| 9 | .wSectorsInBlock resb 2 ; 4, Block size in sectors |
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| 10 | .bSectorsLeft resb 1 ; 6, Sectors left to transfer |
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[218] | 11 | resb 1 ; 7, IDEPACK.bDeviceControl |
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[363] | 12 | .bSectorsDone resb 1 ; 8, Number of sectors xferred |
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[150] | 13 | endstruc |
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| 14 | |
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| 15 | |
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| 16 | ; Section containing code |
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| 17 | SECTION .text |
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| 18 | |
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| 19 | ;-------------------------------------------------------------------- |
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| 20 | ; IdeTransfer_StartWithCommandInAL |
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| 21 | ; Parameters: |
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| 22 | ; AL: IDE command that was used to start the transfer |
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[171] | 23 | ; (all PIO read and write commands including Identify Device) |
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[218] | 24 | ; ES:SI: Ptr to normalized data buffer |
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[150] | 25 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 26 | ; SS:BP: Ptr to IDEPACK |
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| 27 | ; Returns: |
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| 28 | ; AH: INT 13h Error Code |
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[218] | 29 | ; CX: Number of successfully transferred sectors |
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[150] | 30 | ; CF: Cleared if success, Set if error |
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| 31 | ; Corrupts registers: |
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[218] | 32 | ; AL, BX, DX, SI, ES |
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[150] | 33 | ;-------------------------------------------------------------------- |
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| 34 | ALIGN JUMP_ALIGN |
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| 35 | IdeTransfer_StartWithCommandInAL: |
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[157] | 36 | ; Are we reading or writing? |
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[171] | 37 | test al, 16 ; Bit 4 is cleared on all the read commands but set on 3 of the 4 write commands |
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[242] | 38 | mov ah, [bp+IDEPACK.bSectorCount] |
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| 39 | jnz SHORT WriteToDrive |
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[171] | 40 | cmp al, COMMAND_WRITE_MULTIPLE |
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[242] | 41 | je SHORT WriteToDrive |
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| 42 | ; Fall to ReadFromDrive |
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[150] | 43 | |
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| 44 | ;-------------------------------------------------------------------- |
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[242] | 45 | ; ReadFromDrive |
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[150] | 46 | ; Parameters: |
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[242] | 47 | ; AH: Number of sectors to transfer (1...128) |
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| 48 | ; ES:SI: Normalized ptr to buffer to receive data |
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[150] | 49 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 50 | ; SS:BP: Ptr to PIOVARS |
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| 51 | ; Returns: |
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[242] | 52 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[150] | 53 | ; AH: BIOS Error code |
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[218] | 54 | ; CX: Number of successfully transferred sectors |
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[294] | 55 | ; CF: 0 if transfer successful |
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[150] | 56 | ; 1 if any error |
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| 57 | ; Corrupts registers: |
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[218] | 58 | ; AL, BX, DX, SI, ES |
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[150] | 59 | ;-------------------------------------------------------------------- |
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[242] | 60 | ReadFromDrive: |
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| 61 | ; Prepare to read data to ESSI |
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| 62 | mov bx, g_rgfnPioRead |
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| 63 | call InitializePiovarsInSSBPwithSectorCountInAH |
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| 64 | |
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| 65 | ; Wait until drive is ready to transfer |
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| 66 | call IdeWait_IRQorDRQ ; Wait until ready to transfer |
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[218] | 67 | jc SHORT ReturnWithTransferErrorInAH |
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[242] | 68 | xchg si, di ; ES:DI now points buffer |
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[218] | 69 | |
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[363] | 70 | mov cx, [bp+PIOVARS.wSectorsInBlock] ; Max 128 |
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[242] | 71 | |
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[150] | 72 | ALIGN JUMP_ALIGN |
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[242] | 73 | .ReadNextBlockFromDrive: |
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[150] | 74 | mov dx, [bp+PIOVARS.wDataPort] |
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[363] | 75 | cmp [bp+PIOVARS.bSectorsLeft], cl |
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[242] | 76 | jbe SHORT .ReadLastBlockFromDrive |
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[218] | 77 | call [bp+PIOVARS.fnXfer] |
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[169] | 78 | |
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[218] | 79 | ; Wait until ready for next block and check for errors |
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[242] | 80 | xchg di, si ; DS:DI now points DPT |
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[218] | 81 | call IdeWait_IRQorDRQ ; Wait until ready to transfer |
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| 82 | jc SHORT ReturnWithTransferErrorInAH |
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[242] | 83 | xchg si, di ; ES:DI now points buffer |
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[169] | 84 | |
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[363] | 85 | ; Increment number of successfully read sectors |
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| 86 | mov cx, [bp+PIOVARS.wSectorsInBlock] |
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| 87 | sub [bp+PIOVARS.bSectorsLeft], cl |
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| 88 | add [bp+PIOVARS.bSectorsDone], cl |
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[242] | 89 | jmp SHORT .ReadNextBlockFromDrive |
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[150] | 90 | |
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| 91 | ALIGN JUMP_ALIGN |
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[242] | 92 | .ReadLastBlockFromDrive: |
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[363] | 93 | mov cl, [bp+PIOVARS.bSectorsLeft] ; CH is already zero |
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[150] | 94 | call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block |
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| 95 | |
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[242] | 96 | ; Check for errors in last block |
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| 97 | mov di, si ; DS:DI now points DPT |
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| 98 | CheckErrorsAfterTransferringLastBlock: |
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| 99 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY) |
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| 100 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 101 | |
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[242] | 102 | ; Return number of successfully read sectors |
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| 103 | ReturnWithTransferErrorInAH: |
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[370] | 104 | %ifdef USE_386 |
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| 105 | movzx cx, [bp+PIOVARS.bSectorsDone] |
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| 106 | %else |
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[363] | 107 | mov cl, [bp+PIOVARS.bSectorsDone] |
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| 108 | mov ch, 0 ; Preserve CF |
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[370] | 109 | %endif |
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[242] | 110 | ret |
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| 111 | |
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| 112 | |
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[150] | 113 | ;-------------------------------------------------------------------- |
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[242] | 114 | ; WriteToDrive |
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[150] | 115 | ; Parameters: |
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[242] | 116 | ; AH: Number of sectors to transfer (1...128) |
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| 117 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 118 | ; ES:SI: Normalized ptr to buffer containing data |
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[150] | 119 | ; SS:BP: Ptr to PIOVARS |
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| 120 | ; Returns: |
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| 121 | ; AH: BIOS Error code |
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[218] | 122 | ; CX: Number of successfully transferred sectors |
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[294] | 123 | ; CF: 0 if transfer successful |
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[150] | 124 | ; 1 if any error |
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| 125 | ; Corrupts registers: |
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[218] | 126 | ; AL, BX, DX, SI, ES |
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[150] | 127 | ;-------------------------------------------------------------------- |
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| 128 | ALIGN JUMP_ALIGN |
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[242] | 129 | WriteToDrive: |
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| 130 | ; Prepare to write data from ESSI |
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| 131 | mov bx, g_rgfnPioWrite |
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| 132 | call InitializePiovarsInSSBPwithSectorCountInAH |
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| 133 | |
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| 134 | ; Always poll when writing first block (IRQs are generated for following blocks) |
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| 135 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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| 136 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[218] | 137 | jc SHORT ReturnWithTransferErrorInAH |
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[150] | 138 | |
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[363] | 139 | mov cx, [bp+PIOVARS.wSectorsInBlock] ; Max 128 |
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[242] | 140 | |
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[218] | 141 | ALIGN JUMP_ALIGN |
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[242] | 142 | .WriteNextBlockToDrive: |
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[150] | 143 | mov dx, [bp+PIOVARS.wDataPort] |
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[363] | 144 | cmp [bp+PIOVARS.bSectorsLeft], cl |
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[242] | 145 | jbe SHORT .WriteLastBlockToDrive |
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[218] | 146 | call [bp+PIOVARS.fnXfer] |
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[169] | 147 | |
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[218] | 148 | ; Wait until ready for next block and check for errors |
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| 149 | call IdeWait_IRQorDRQ ; Wait until ready to transfer |
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| 150 | jc SHORT ReturnWithTransferErrorInAH |
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[150] | 151 | |
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[363] | 152 | ; Increment number of successfully written sectors |
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| 153 | mov cx, [bp+PIOVARS.wSectorsInBlock] |
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| 154 | sub [bp+PIOVARS.bSectorsLeft], cl |
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| 155 | add [bp+PIOVARS.bSectorsDone], cl |
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[242] | 156 | jmp SHORT .WriteNextBlockToDrive |
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[169] | 157 | |
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[150] | 158 | ALIGN JUMP_ALIGN |
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[242] | 159 | .WriteLastBlockToDrive: |
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[363] | 160 | mov cl, [bp+PIOVARS.bSectorsLeft] ; CH is already zero |
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[242] | 161 | %ifdef USE_186 |
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| 162 | push CheckErrorsAfterTransferringLastBlock |
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| 163 | jmp [bp+PIOVARS.fnXfer] ; Transfer possibly partial block |
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| 164 | %else |
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[150] | 165 | call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block |
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[242] | 166 | jmp SHORT CheckErrorsAfterTransferringLastBlock |
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| 167 | %endif |
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[218] | 168 | |
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[150] | 169 | |
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| 170 | ;-------------------------------------------------------------------- |
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[218] | 171 | ; InitializePiovarsInSSBPwithSectorCountInAH |
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[150] | 172 | ; Parameters: |
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[218] | 173 | ; AH: Number of sectors to transfer (1...128) |
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[150] | 174 | ; BX: Offset to transfer function lookup table |
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| 175 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[169] | 176 | ; SS:BP: Ptr to PIOVARS |
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[167] | 177 | ; Returns: |
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[169] | 178 | ; Nothing |
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[150] | 179 | ; Corrupts registers: |
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[242] | 180 | ; AX, BX, DX |
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[150] | 181 | ;-------------------------------------------------------------------- |
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| 182 | ALIGN JUMP_ALIGN |
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[218] | 183 | InitializePiovarsInSSBPwithSectorCountInAH: |
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| 184 | ; Store sizes |
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[363] | 185 | mov [bp+PIOVARS.bSectorsLeft], ah |
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[370] | 186 | eMOVZX ax, [di+DPT_ATA.bBlockSize] |
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[363] | 187 | mov [bp+PIOVARS.wSectorsInBlock], ax |
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| 188 | mov [bp+PIOVARS.bSectorsDone], ah ; Zero |
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[150] | 189 | |
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| 190 | ; Get transfer function based on bus type |
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[158] | 191 | xchg ax, bx ; Lookup table offset to AX |
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[242] | 192 | mov bl, [di+DPT.bIdevarsOffset] ; CS:BX now points to IDEVARS |
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[150] | 193 | mov dx, [cs:bx+IDEVARS.wPort] ; Load IDE Data port address |
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[363] | 194 | %ifdef MODULE_ADVANCED_ATA |
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[364] | 195 | mov bl, [di+DPT_ADVANCED_ATA.bDevice] |
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[363] | 196 | %else |
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[150] | 197 | mov bl, [cs:bx+IDEVARS.bDevice] ; Load device type to BX |
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[363] | 198 | %endif |
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[150] | 199 | add bx, ax |
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[363] | 200 | |
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[242] | 201 | mov [bp+PIOVARS.wDataPort], dx |
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[150] | 202 | mov ax, [cs:bx] ; Load offset to transfer function |
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| 203 | mov [bp+PIOVARS.fnXfer], ax |
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| 204 | ret |
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| 205 | |
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| 206 | |
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| 207 | ;-------------------------------------------------------------------- |
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[361] | 208 | ; ReadBlockFromXtideRev1 XTIDE rev 1 |
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| 209 | ; ReadBlockFromXtideRev2 XTIDE rev 2 or rev 1 with swapped A0 and A3 (chuck-mod) |
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| 210 | ; ReadBlockFrom16bitDataPort Normal 16-bit IDE |
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| 211 | ; ReadBlockFrom32bitDataPort VLB/PCI 32-bit IDE |
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[150] | 212 | ; Parameters: |
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[363] | 213 | ; CX: Block size in 512 byte sectors |
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[150] | 214 | ; DX: IDE Data port address |
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[242] | 215 | ; ES:DI: Normalized ptr to buffer to receive data |
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[150] | 216 | ; Returns: |
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| 217 | ; Nothing |
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| 218 | ; Corrupts registers: |
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| 219 | ; AX, BX, CX |
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| 220 | ;-------------------------------------------------------------------- |
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| 221 | ALIGN JUMP_ALIGN |
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[361] | 222 | ReadBlockFromXtideRev1: |
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[363] | 223 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[370] | 224 | mov bl, 8 ; Bit mask for toggling data low/high reg |
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[150] | 225 | ALIGN JUMP_ALIGN |
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| 226 | .InswLoop: |
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[152] | 227 | XTIDE_INSW |
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| 228 | XTIDE_INSW |
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| 229 | XTIDE_INSW |
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| 230 | XTIDE_INSW |
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[150] | 231 | loop .InswLoop |
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| 232 | ret |
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| 233 | |
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[361] | 234 | ;-------------------------------------------------------------------- |
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| 235 | %ifndef USE_186 ; 8086/8088 compatible WORD read |
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[150] | 236 | ALIGN JUMP_ALIGN |
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[361] | 237 | ReadBlockFromXtideRev2: |
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[363] | 238 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[152] | 239 | ALIGN JUMP_ALIGN |
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| 240 | .ReadNextQword: |
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| 241 | in ax, dx ; Read 1st WORD |
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| 242 | stosw ; Store 1st WORD to [ES:DI] |
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| 243 | in ax, dx |
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| 244 | stosw ; 2nd |
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| 245 | in ax, dx |
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| 246 | stosw ; 3rd |
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| 247 | in ax, dx |
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| 248 | stosw ; 4th |
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| 249 | loop .ReadNextQword |
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| 250 | ret |
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| 251 | %endif |
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[150] | 252 | |
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[361] | 253 | ;-------------------------------------------------------------------- |
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[152] | 254 | ALIGN JUMP_ALIGN |
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[361] | 255 | ReadBlockFrom16bitDataPort: |
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[363] | 256 | xchg cl, ch ; Sectors to WORDs |
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[152] | 257 | rep |
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| 258 | db 6Dh ; INSW (we want this in XT build) |
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| 259 | ret |
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| 260 | |
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[361] | 261 | ;-------------------------------------------------------------------- |
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[152] | 262 | ALIGN JUMP_ALIGN |
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[361] | 263 | ReadBlockFrom32bitDataPort: |
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[363] | 264 | db 0C1h ; SHL |
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| 265 | db 0E1h ; CX |
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| 266 | db 7 ; 7 (Sectors to DWORDs) |
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[152] | 267 | rep |
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| 268 | db 66h ; Override operand size to 32-bit |
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| 269 | db 6Dh ; INSW/INSD |
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| 270 | ret |
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| 271 | |
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| 272 | |
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[150] | 273 | ;-------------------------------------------------------------------- |
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[361] | 274 | ; WriteBlockToXtideRev1 XTIDE rev 1 |
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| 275 | ; WriteBlockToXtideRev2 XTIDE rev 2 or rev 1 with swapped A0 and A3 (chuck-mod) |
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| 276 | ; WriteBlockToFastXtide Fast XTIDE (CPLD v2 project) |
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| 277 | ; WriteBlockTo16bitDataPort Normal 16-bit IDE |
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| 278 | ; WriteBlockTo32bitDataPort VLB/PCI 32-bit IDE |
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[150] | 279 | ; Parameters: |
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[363] | 280 | ; CX: Block size in 512-byte sectors |
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[150] | 281 | ; DX: IDE Data port address |
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| 282 | ; ES:SI: Normalized ptr to buffer containing data |
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| 283 | ; Returns: |
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| 284 | ; Nothing |
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| 285 | ; Corrupts registers: |
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| 286 | ; AX, CX |
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| 287 | ;-------------------------------------------------------------------- |
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| 288 | ALIGN JUMP_ALIGN |
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[361] | 289 | WriteBlockToXtideRev1: |
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[150] | 290 | push ds |
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| 291 | push bx |
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[363] | 292 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[370] | 293 | mov bl, 8 ; Bit mask for toggling data low/high reg |
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[152] | 294 | push es ; Copy ES... |
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| 295 | pop ds ; ...to DS |
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[150] | 296 | ALIGN JUMP_ALIGN |
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| 297 | .OutswLoop: |
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[152] | 298 | XTIDE_OUTSW |
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| 299 | XTIDE_OUTSW |
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| 300 | XTIDE_OUTSW |
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| 301 | XTIDE_OUTSW |
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[150] | 302 | loop .OutswLoop |
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| 303 | pop bx |
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| 304 | pop ds |
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| 305 | ret |
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| 306 | |
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[361] | 307 | ;-------------------------------------------------------------------- |
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[150] | 308 | ALIGN JUMP_ALIGN |
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[361] | 309 | WriteBlockToXtideRev2: |
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[363] | 310 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[152] | 311 | push ds |
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| 312 | push es ; Copy ES... |
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| 313 | pop ds ; ...to DS |
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| 314 | ALIGN JUMP_ALIGN |
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| 315 | .WriteNextQword: |
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| 316 | XTIDE_MOD_OUTSW |
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| 317 | XTIDE_MOD_OUTSW |
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| 318 | XTIDE_MOD_OUTSW |
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| 319 | XTIDE_MOD_OUTSW |
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| 320 | loop .WriteNextQword |
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| 321 | pop ds |
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| 322 | ret |
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[150] | 323 | |
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[361] | 324 | ;-------------------------------------------------------------------- |
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| 325 | %ifndef USE_186 ; 8086/8088 compatible WORD write |
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[152] | 326 | ALIGN JUMP_ALIGN |
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[361] | 327 | WriteBlockToFastXtide: |
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[363] | 328 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[361] | 329 | push ds |
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| 330 | push es |
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| 331 | pop ds |
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| 332 | ALIGN JUMP_ALIGN |
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| 333 | .ReadNextQword: |
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| 334 | lodsw ; Load 1st WORD from [DS:SI] |
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| 335 | out dx, ax ; Write 1st WORD |
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| 336 | lodsw |
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| 337 | out dx, ax ; 2nd |
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| 338 | lodsw |
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| 339 | out dx, ax ; 3rd |
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| 340 | lodsw |
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| 341 | out dx, ax ; 4th |
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| 342 | loop .ReadNextQword |
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| 343 | pop ds |
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| 344 | ret |
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| 345 | %endif |
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| 346 | |
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| 347 | ;-------------------------------------------------------------------- |
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| 348 | ALIGN JUMP_ALIGN |
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| 349 | WriteBlockTo16bitDataPort: |
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[363] | 350 | xchg cl, ch ; Sectors to WORDs |
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[223] | 351 | es ; Source is ES segment |
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[152] | 352 | rep |
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[155] | 353 | db 6Fh ; OUTSW (we want this in XT build) |
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[152] | 354 | ret |
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| 355 | |
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[361] | 356 | ;-------------------------------------------------------------------- |
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[152] | 357 | ALIGN JUMP_ALIGN |
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[361] | 358 | WriteBlockTo32bitDataPort: |
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[363] | 359 | db 0C1h ; SHL |
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| 360 | db 0E1h ; CX |
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| 361 | db 7 ; 7 (Sectors to DWORDs) |
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[223] | 362 | es ; Source is ES segment |
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[152] | 363 | rep |
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| 364 | db 66h ; Override operand size to 32-bit |
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| 365 | db 6Fh ; OUTSW/OUTSD |
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| 366 | ret |
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| 367 | |
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| 368 | |
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[361] | 369 | |
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[150] | 370 | ; Lookup tables to get transfer function based on bus type |
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| 371 | ALIGN WORD_ALIGN |
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| 372 | g_rgfnPioRead: |
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[361] | 373 | dw ReadBlockFromXtideRev1 ; DEVICE_XTIDE_REV1 |
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[152] | 374 | %ifdef USE_186 |
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[361] | 375 | dw ReadBlockFrom16bitDataPort ; DEVICE_XTIDE_REV2 |
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| 376 | dw ReadBlockFrom16bitDataPort ; DEVICE_FAST_XTIDE |
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[152] | 377 | %else |
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[361] | 378 | dw ReadBlockFromXtideRev2 ; DEVICE_XTIDE_REV2 |
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| 379 | dw ReadBlockFromXtideRev2 ; DEVICE_FAST_XTIDE |
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[152] | 380 | %endif |
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[361] | 381 | dw ReadBlockFrom16bitDataPort ; DEVICE_16BIT_ATA |
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| 382 | dw ReadBlockFrom32bitDataPort ; DEVICE_32BIT_ATA |
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[152] | 383 | |
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[150] | 384 | g_rgfnPioWrite: |
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[361] | 385 | dw WriteBlockToXtideRev1 ; DEVICE_XTIDE_REV1 |
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| 386 | dw WriteBlockToXtideRev2 ; DEVICE_XTIDE_REV2 |
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| 387 | %ifdef USE_186 |
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| 388 | dw WriteBlockTo16bitDataPort ; DEVICE_FAST_XTIDE |
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| 389 | %else |
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| 390 | dw WriteBlockToFastXtide ; DEVICE_FAST_XTIDE |
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| 391 | %endif |
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| 392 | dw WriteBlockTo16bitDataPort ; DEVICE_16BIT_ATA |
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| 393 | dw WriteBlockTo32bitDataPort ; DEVICE_32BIT_ATA |
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