[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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[376] | 4 | ; |
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| 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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| 12 | ; |
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| 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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| 19 | |
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[150] | 20 | ; Structure containing variables for PIO transfer functions. |
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| 21 | ; This struct must not be larger than IDEPACK without INTPACK. |
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[414] | 22 | struc PIOVARS ; Must not be larger than 9 bytes! See IDEPACK in RamVars.inc. |
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| 23 | .wDataPort resb 2 ; 0-1, IDE Data Port |
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| 24 | .fnXfer resb 2 ; 2-3, Offset to transfer function |
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| 25 | .wSectorsInBlock resb 2 ; 4-5, Block size in sectors |
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[363] | 26 | .bSectorsLeft resb 1 ; 6, Sectors left to transfer |
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[218] | 27 | resb 1 ; 7, IDEPACK.bDeviceControl |
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[363] | 28 | .bSectorsDone resb 1 ; 8, Number of sectors xferred |
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[150] | 29 | endstruc |
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| 30 | |
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| 31 | |
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| 32 | ; Section containing code |
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| 33 | SECTION .text |
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| 34 | |
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| 35 | ;-------------------------------------------------------------------- |
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| 36 | ; IdeTransfer_StartWithCommandInAL |
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| 37 | ; Parameters: |
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| 38 | ; AL: IDE command that was used to start the transfer |
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[171] | 39 | ; (all PIO read and write commands including Identify Device) |
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[218] | 40 | ; ES:SI: Ptr to normalized data buffer |
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[150] | 41 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 42 | ; SS:BP: Ptr to IDEPACK |
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| 43 | ; Returns: |
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| 44 | ; AH: INT 13h Error Code |
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[218] | 45 | ; CX: Number of successfully transferred sectors |
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[150] | 46 | ; CF: Cleared if success, Set if error |
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| 47 | ; Corrupts registers: |
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[218] | 48 | ; AL, BX, DX, SI, ES |
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[150] | 49 | ;-------------------------------------------------------------------- |
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| 50 | ALIGN JUMP_ALIGN |
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| 51 | IdeTransfer_StartWithCommandInAL: |
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[157] | 52 | ; Are we reading or writing? |
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[171] | 53 | 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] | 54 | mov ah, [bp+IDEPACK.bSectorCount] |
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| 55 | jnz SHORT WriteToDrive |
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[171] | 56 | cmp al, COMMAND_WRITE_MULTIPLE |
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[242] | 57 | je SHORT WriteToDrive |
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| 58 | ; Fall to ReadFromDrive |
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[150] | 59 | |
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| 60 | ;-------------------------------------------------------------------- |
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[242] | 61 | ; ReadFromDrive |
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[150] | 62 | ; Parameters: |
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[242] | 63 | ; AH: Number of sectors to transfer (1...128) |
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| 64 | ; ES:SI: Normalized ptr to buffer to receive data |
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[150] | 65 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 66 | ; SS:BP: Ptr to PIOVARS |
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| 67 | ; Returns: |
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[242] | 68 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[150] | 69 | ; AH: BIOS Error code |
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[218] | 70 | ; CX: Number of successfully transferred sectors |
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[294] | 71 | ; CF: 0 if transfer successful |
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[150] | 72 | ; 1 if any error |
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| 73 | ; Corrupts registers: |
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[218] | 74 | ; AL, BX, DX, SI, ES |
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[150] | 75 | ;-------------------------------------------------------------------- |
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[242] | 76 | ReadFromDrive: |
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| 77 | ; Prepare to read data to ESSI |
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| 78 | mov bx, g_rgfnPioRead |
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| 79 | call InitializePiovarsInSSBPwithSectorCountInAH |
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| 80 | |
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| 81 | ; Wait until drive is ready to transfer |
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| 82 | call IdeWait_IRQorDRQ ; Wait until ready to transfer |
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[218] | 83 | jc SHORT ReturnWithTransferErrorInAH |
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[242] | 84 | xchg si, di ; ES:DI now points buffer |
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[218] | 85 | |
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[363] | 86 | mov cx, [bp+PIOVARS.wSectorsInBlock] ; Max 128 |
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[242] | 87 | |
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[150] | 88 | ALIGN JUMP_ALIGN |
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[242] | 89 | .ReadNextBlockFromDrive: |
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[150] | 90 | mov dx, [bp+PIOVARS.wDataPort] |
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[363] | 91 | cmp [bp+PIOVARS.bSectorsLeft], cl |
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[242] | 92 | jbe SHORT .ReadLastBlockFromDrive |
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[218] | 93 | call [bp+PIOVARS.fnXfer] |
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[169] | 94 | |
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[218] | 95 | ; Wait until ready for next block and check for errors |
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[242] | 96 | xchg di, si ; DS:DI now points DPT |
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[218] | 97 | call IdeWait_IRQorDRQ ; Wait until ready to transfer |
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| 98 | jc SHORT ReturnWithTransferErrorInAH |
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[242] | 99 | xchg si, di ; ES:DI now points buffer |
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[169] | 100 | |
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[363] | 101 | ; Increment number of successfully read sectors |
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| 102 | mov cx, [bp+PIOVARS.wSectorsInBlock] |
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| 103 | sub [bp+PIOVARS.bSectorsLeft], cl |
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| 104 | add [bp+PIOVARS.bSectorsDone], cl |
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[242] | 105 | jmp SHORT .ReadNextBlockFromDrive |
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[150] | 106 | |
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| 107 | ALIGN JUMP_ALIGN |
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[242] | 108 | .ReadLastBlockFromDrive: |
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[363] | 109 | mov cl, [bp+PIOVARS.bSectorsLeft] ; CH is already zero |
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[150] | 110 | call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block |
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| 111 | |
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[242] | 112 | ; Check for errors in last block |
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| 113 | mov di, si ; DS:DI now points DPT |
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| 114 | CheckErrorsAfterTransferringLastBlock: |
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[417] | 115 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_BSY) |
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[242] | 116 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[150] | 117 | |
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[242] | 118 | ; Return number of successfully read sectors |
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| 119 | ReturnWithTransferErrorInAH: |
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[370] | 120 | %ifdef USE_386 |
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| 121 | movzx cx, [bp+PIOVARS.bSectorsDone] |
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| 122 | %else |
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[363] | 123 | mov cl, [bp+PIOVARS.bSectorsDone] |
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| 124 | mov ch, 0 ; Preserve CF |
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[370] | 125 | %endif |
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[242] | 126 | ret |
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| 127 | |
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| 128 | |
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[150] | 129 | ;-------------------------------------------------------------------- |
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[242] | 130 | ; WriteToDrive |
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[150] | 131 | ; Parameters: |
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[242] | 132 | ; AH: Number of sectors to transfer (1...128) |
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| 133 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 134 | ; ES:SI: Normalized ptr to buffer containing data |
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[150] | 135 | ; SS:BP: Ptr to PIOVARS |
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| 136 | ; Returns: |
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| 137 | ; AH: BIOS Error code |
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[218] | 138 | ; CX: Number of successfully transferred sectors |
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[294] | 139 | ; CF: 0 if transfer successful |
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[150] | 140 | ; 1 if any error |
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| 141 | ; Corrupts registers: |
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[218] | 142 | ; AL, BX, DX, SI, ES |
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[150] | 143 | ;-------------------------------------------------------------------- |
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| 144 | ALIGN JUMP_ALIGN |
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[242] | 145 | WriteToDrive: |
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| 146 | ; Prepare to write data from ESSI |
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| 147 | mov bx, g_rgfnPioWrite |
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| 148 | call InitializePiovarsInSSBPwithSectorCountInAH |
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| 149 | |
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| 150 | ; Always poll when writing first block (IRQs are generated for following blocks) |
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| 151 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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| 152 | call IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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[218] | 153 | jc SHORT ReturnWithTransferErrorInAH |
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[150] | 154 | |
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[363] | 155 | mov cx, [bp+PIOVARS.wSectorsInBlock] ; Max 128 |
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[242] | 156 | |
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[218] | 157 | ALIGN JUMP_ALIGN |
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[242] | 158 | .WriteNextBlockToDrive: |
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[150] | 159 | mov dx, [bp+PIOVARS.wDataPort] |
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[363] | 160 | cmp [bp+PIOVARS.bSectorsLeft], cl |
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[242] | 161 | jbe SHORT .WriteLastBlockToDrive |
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[218] | 162 | call [bp+PIOVARS.fnXfer] |
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[169] | 163 | |
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[218] | 164 | ; Wait until ready for next block and check for errors |
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| 165 | call IdeWait_IRQorDRQ ; Wait until ready to transfer |
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| 166 | jc SHORT ReturnWithTransferErrorInAH |
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[150] | 167 | |
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[363] | 168 | ; Increment number of successfully written sectors |
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| 169 | mov cx, [bp+PIOVARS.wSectorsInBlock] |
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| 170 | sub [bp+PIOVARS.bSectorsLeft], cl |
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| 171 | add [bp+PIOVARS.bSectorsDone], cl |
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[242] | 172 | jmp SHORT .WriteNextBlockToDrive |
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[169] | 173 | |
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[150] | 174 | ALIGN JUMP_ALIGN |
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[242] | 175 | .WriteLastBlockToDrive: |
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[363] | 176 | mov cl, [bp+PIOVARS.bSectorsLeft] ; CH is already zero |
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[242] | 177 | %ifdef USE_186 |
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| 178 | push CheckErrorsAfterTransferringLastBlock |
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| 179 | jmp [bp+PIOVARS.fnXfer] ; Transfer possibly partial block |
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| 180 | %else |
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[150] | 181 | call [bp+PIOVARS.fnXfer] ; Transfer possibly partial block |
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[242] | 182 | jmp SHORT CheckErrorsAfterTransferringLastBlock |
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| 183 | %endif |
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[218] | 184 | |
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[150] | 185 | |
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| 186 | ;-------------------------------------------------------------------- |
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[218] | 187 | ; InitializePiovarsInSSBPwithSectorCountInAH |
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[150] | 188 | ; Parameters: |
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[218] | 189 | ; AH: Number of sectors to transfer (1...128) |
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[150] | 190 | ; BX: Offset to transfer function lookup table |
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| 191 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[169] | 192 | ; SS:BP: Ptr to PIOVARS |
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[167] | 193 | ; Returns: |
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[169] | 194 | ; Nothing |
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[150] | 195 | ; Corrupts registers: |
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[242] | 196 | ; AX, BX, DX |
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[150] | 197 | ;-------------------------------------------------------------------- |
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| 198 | ALIGN JUMP_ALIGN |
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[218] | 199 | InitializePiovarsInSSBPwithSectorCountInAH: |
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| 200 | ; Store sizes |
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[363] | 201 | mov [bp+PIOVARS.bSectorsLeft], ah |
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[370] | 202 | eMOVZX ax, [di+DPT_ATA.bBlockSize] |
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[363] | 203 | mov [bp+PIOVARS.wSectorsInBlock], ax |
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| 204 | mov [bp+PIOVARS.bSectorsDone], ah ; Zero |
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[150] | 205 | |
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| 206 | ; Get transfer function based on bus type |
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[158] | 207 | xchg ax, bx ; Lookup table offset to AX |
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[242] | 208 | mov bl, [di+DPT.bIdevarsOffset] ; CS:BX now points to IDEVARS |
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[150] | 209 | mov dx, [cs:bx+IDEVARS.wPort] ; Load IDE Data port address |
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[400] | 210 | mov bl, [di+DPT_ATA.bDevice] |
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[150] | 211 | add bx, ax |
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[363] | 212 | |
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[242] | 213 | mov [bp+PIOVARS.wDataPort], dx |
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[150] | 214 | mov ax, [cs:bx] ; Load offset to transfer function |
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| 215 | mov [bp+PIOVARS.fnXfer], ax |
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| 216 | ret |
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| 217 | |
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| 218 | |
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| 219 | ;-------------------------------------------------------------------- |
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[361] | 220 | ; ReadBlockFromXtideRev1 XTIDE rev 1 |
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| 221 | ; ReadBlockFromXtideRev2 XTIDE rev 2 or rev 1 with swapped A0 and A3 (chuck-mod) |
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| 222 | ; ReadBlockFrom16bitDataPort Normal 16-bit IDE |
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| 223 | ; ReadBlockFrom32bitDataPort VLB/PCI 32-bit IDE |
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[150] | 224 | ; Parameters: |
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[363] | 225 | ; CX: Block size in 512 byte sectors |
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[150] | 226 | ; DX: IDE Data port address |
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[242] | 227 | ; ES:DI: Normalized ptr to buffer to receive data |
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[150] | 228 | ; Returns: |
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| 229 | ; Nothing |
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| 230 | ; Corrupts registers: |
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| 231 | ; AX, BX, CX |
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| 232 | ;-------------------------------------------------------------------- |
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[400] | 233 | %ifdef MODULE_8BIT_IDE |
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| 234 | |
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[150] | 235 | ALIGN JUMP_ALIGN |
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[361] | 236 | ReadBlockFromXtideRev1: |
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[363] | 237 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[370] | 238 | mov bl, 8 ; Bit mask for toggling data low/high reg |
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[150] | 239 | ALIGN JUMP_ALIGN |
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| 240 | .InswLoop: |
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[152] | 241 | XTIDE_INSW |
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| 242 | XTIDE_INSW |
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| 243 | XTIDE_INSW |
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| 244 | XTIDE_INSW |
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[150] | 245 | loop .InswLoop |
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| 246 | ret |
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| 247 | |
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[361] | 248 | ;-------------------------------------------------------------------- |
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| 249 | %ifndef USE_186 ; 8086/8088 compatible WORD read |
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[150] | 250 | ALIGN JUMP_ALIGN |
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[361] | 251 | ReadBlockFromXtideRev2: |
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[363] | 252 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[152] | 253 | ALIGN JUMP_ALIGN |
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| 254 | .ReadNextQword: |
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| 255 | in ax, dx ; Read 1st WORD |
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| 256 | stosw ; Store 1st WORD to [ES:DI] |
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| 257 | in ax, dx |
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| 258 | stosw ; 2nd |
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| 259 | in ax, dx |
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| 260 | stosw ; 3rd |
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| 261 | in ax, dx |
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| 262 | stosw ; 4th |
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| 263 | loop .ReadNextQword |
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| 264 | ret |
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| 265 | %endif |
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[150] | 266 | |
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[400] | 267 | %endif ; MODULE_8BIT_IDE |
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| 268 | |
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[361] | 269 | ;-------------------------------------------------------------------- |
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[401] | 270 | %ifdef USE_186 |
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[152] | 271 | ALIGN JUMP_ALIGN |
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[361] | 272 | ReadBlockFrom16bitDataPort: |
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[363] | 273 | xchg cl, ch ; Sectors to WORDs |
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[152] | 274 | rep |
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| 275 | db 6Dh ; INSW (we want this in XT build) |
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| 276 | ret |
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[401] | 277 | %endif |
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[152] | 278 | |
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[361] | 279 | ;-------------------------------------------------------------------- |
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[401] | 280 | %ifdef USE_AT |
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[152] | 281 | ALIGN JUMP_ALIGN |
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[361] | 282 | ReadBlockFrom32bitDataPort: |
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[363] | 283 | db 0C1h ; SHL |
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| 284 | db 0E1h ; CX |
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| 285 | db 7 ; 7 (Sectors to DWORDs) |
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[152] | 286 | rep |
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| 287 | db 66h ; Override operand size to 32-bit |
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| 288 | db 6Dh ; INSW/INSD |
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| 289 | ret |
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[401] | 290 | %endif |
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[152] | 291 | |
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| 292 | |
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[150] | 293 | ;-------------------------------------------------------------------- |
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[361] | 294 | ; WriteBlockToXtideRev1 XTIDE rev 1 |
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| 295 | ; WriteBlockToXtideRev2 XTIDE rev 2 or rev 1 with swapped A0 and A3 (chuck-mod) |
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| 296 | ; WriteBlockToFastXtide Fast XTIDE (CPLD v2 project) |
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| 297 | ; WriteBlockTo16bitDataPort Normal 16-bit IDE |
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| 298 | ; WriteBlockTo32bitDataPort VLB/PCI 32-bit IDE |
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[150] | 299 | ; Parameters: |
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[363] | 300 | ; CX: Block size in 512-byte sectors |
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[150] | 301 | ; DX: IDE Data port address |
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| 302 | ; ES:SI: Normalized ptr to buffer containing data |
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| 303 | ; Returns: |
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| 304 | ; Nothing |
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| 305 | ; Corrupts registers: |
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[417] | 306 | ; AX, BX, CX, DX |
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[150] | 307 | ;-------------------------------------------------------------------- |
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[400] | 308 | %ifdef MODULE_8BIT_IDE |
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| 309 | |
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[150] | 310 | ALIGN JUMP_ALIGN |
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[361] | 311 | WriteBlockToXtideRev1: |
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[150] | 312 | push ds |
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[363] | 313 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[370] | 314 | mov bl, 8 ; Bit mask for toggling data low/high reg |
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[152] | 315 | push es ; Copy ES... |
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| 316 | pop ds ; ...to DS |
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[150] | 317 | ALIGN JUMP_ALIGN |
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| 318 | .OutswLoop: |
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[152] | 319 | XTIDE_OUTSW |
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| 320 | XTIDE_OUTSW |
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| 321 | XTIDE_OUTSW |
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| 322 | XTIDE_OUTSW |
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[150] | 323 | loop .OutswLoop |
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| 324 | pop ds |
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| 325 | ret |
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| 326 | |
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[361] | 327 | ;-------------------------------------------------------------------- |
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[150] | 328 | ALIGN JUMP_ALIGN |
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[361] | 329 | WriteBlockToXtideRev2: |
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[363] | 330 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[152] | 331 | push ds |
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| 332 | push es ; Copy ES... |
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| 333 | pop ds ; ...to DS |
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| 334 | ALIGN JUMP_ALIGN |
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| 335 | .WriteNextQword: |
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| 336 | XTIDE_MOD_OUTSW |
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| 337 | XTIDE_MOD_OUTSW |
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| 338 | XTIDE_MOD_OUTSW |
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| 339 | XTIDE_MOD_OUTSW |
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| 340 | loop .WriteNextQword |
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| 341 | pop ds |
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| 342 | ret |
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[150] | 343 | |
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[361] | 344 | ;-------------------------------------------------------------------- |
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[152] | 345 | ALIGN JUMP_ALIGN |
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[361] | 346 | WriteBlockToFastXtide: |
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[363] | 347 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[361] | 348 | push ds |
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| 349 | push es |
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| 350 | pop ds |
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[402] | 351 | or dl, (1<<4) ; Writes need A4 set |
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[361] | 352 | ALIGN JUMP_ALIGN |
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| 353 | .ReadNextQword: |
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| 354 | lodsw ; Load 1st WORD from [DS:SI] |
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| 355 | out dx, ax ; Write 1st WORD |
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| 356 | lodsw |
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| 357 | out dx, ax ; 2nd |
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| 358 | lodsw |
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| 359 | out dx, ax ; 3rd |
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| 360 | lodsw |
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| 361 | out dx, ax ; 4th |
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| 362 | loop .ReadNextQword |
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| 363 | pop ds |
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| 364 | ret |
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| 365 | |
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[400] | 366 | %endif ; MODULE_8BIT_IDE |
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| 367 | |
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[361] | 368 | ;-------------------------------------------------------------------- |
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[402] | 369 | %ifdef USE_AT |
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[361] | 370 | ALIGN JUMP_ALIGN |
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| 371 | WriteBlockTo16bitDataPort: |
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[363] | 372 | xchg cl, ch ; Sectors to WORDs |
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[223] | 373 | es ; Source is ES segment |
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[152] | 374 | rep |
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[155] | 375 | db 6Fh ; OUTSW (we want this in XT build) |
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[152] | 376 | ret |
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| 377 | |
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[361] | 378 | ;-------------------------------------------------------------------- |
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[152] | 379 | ALIGN JUMP_ALIGN |
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[361] | 380 | WriteBlockTo32bitDataPort: |
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[363] | 381 | db 0C1h ; SHL |
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| 382 | db 0E1h ; CX |
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| 383 | db 7 ; 7 (Sectors to DWORDs) |
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[223] | 384 | es ; Source is ES segment |
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[152] | 385 | rep |
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| 386 | db 66h ; Override operand size to 32-bit |
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| 387 | db 6Fh ; OUTSW/OUTSD |
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| 388 | ret |
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[401] | 389 | %endif |
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[152] | 390 | |
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| 391 | |
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[361] | 392 | |
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[150] | 393 | ; Lookup tables to get transfer function based on bus type |
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| 394 | ALIGN WORD_ALIGN |
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| 395 | g_rgfnPioRead: |
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[400] | 396 | %ifdef MODULE_8BIT_IDE |
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[401] | 397 | dw 0 ; 0, DEVICE_8BIT_JRIDE_ISA |
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[400] | 398 | %ifdef USE_186 |
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[401] | 399 | dw ReadBlockFrom16bitDataPort ; 1, DEVICE_FAST_XTIDE |
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| 400 | dw ReadBlockFrom16bitDataPort ; 2, DEVICE_8BIT_XTIDE_REV2 |
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[400] | 401 | %else |
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[401] | 402 | dw ReadBlockFromXtideRev2 ; 1, DEVICE_FAST_XTIDE |
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| 403 | dw ReadBlockFromXtideRev2 ; 2, DEVICE_8BIT_XTIDE_REV2 |
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[400] | 404 | %endif |
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[401] | 405 | dw ReadBlockFromXtideRev1 ; 3, DEVICE_XTIDE_REV1 |
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[400] | 406 | |
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[152] | 407 | %else |
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[400] | 408 | times COUNT_OF_8BIT_IDE_DEVICES dw 0 |
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[152] | 409 | %endif |
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[401] | 410 | %ifdef USE_AT |
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| 411 | dw ReadBlockFrom16bitDataPort ; 4, DEVICE_16BIT_ATA |
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| 412 | dw ReadBlockFrom32bitDataPort ; 5, DEVICE_32BIT_ATA |
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| 413 | %endif |
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[152] | 414 | |
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[400] | 415 | |
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[150] | 416 | g_rgfnPioWrite: |
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[400] | 417 | %ifdef MODULE_8BIT_IDE |
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[401] | 418 | dw 0 ; 0, DEVICE_8BIT_JRIDE_ISA |
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| 419 | dw WriteBlockToFastXtide ; 1, DEVICE_FAST_XTIDE |
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| 420 | dw WriteBlockToXtideRev2 ; 2, DEVICE_XTIDE_REV2 |
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| 421 | dw WriteBlockToXtideRev1 ; 3, DEVICE_XTIDE_REV1 |
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[400] | 422 | |
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[361] | 423 | %else |
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[400] | 424 | times COUNT_OF_8BIT_IDE_DEVICES dw 0 |
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[361] | 425 | %endif |
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[401] | 426 | %ifdef USE_AT |
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| 427 | dw WriteBlockTo16bitDataPort ; 4, DEVICE_16BIT_ATA |
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| 428 | dw WriteBlockTo32bitDataPort ; 5, DEVICE_32BIT_ATA |
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| 429 | %endif |
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