[473] | 1 | ; Project name : XTIDE Universal BIOS |
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[558] | 2 | ; Description : IDE Read/Write functions for transferring block using PIO modes. |
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[473] | 3 | ; These functions should only be called from IdeTransfer.asm. |
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| 4 | |
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| 5 | ; |
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| 6 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[473] | 8 | ; |
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| 9 | ; This program is free software; you can redistribute it and/or modify |
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| 10 | ; it under the terms of the GNU General Public License as published by |
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| 11 | ; the Free Software Foundation; either version 2 of the License, or |
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| 12 | ; (at your option) any later version. |
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| 13 | ; |
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| 14 | ; This program is distributed in the hope that it will be useful, |
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | ; GNU General Public License for more details. |
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| 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 19 | ; |
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| 20 | |
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[545] | 21 | ; Modified by JJP for XT-CFv3 support, Mar-13 |
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| 22 | |
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[473] | 23 | ; Section containing code |
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| 24 | SECTION .text |
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| 25 | |
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[545] | 26 | |
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| 27 | ; -------------------------------------------------------------------------------------------------- |
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| 28 | ; |
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| 29 | ; READ routines follow |
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| 30 | ; |
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| 31 | ; -------------------------------------------------------------------------------------------------- |
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| 32 | |
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| 33 | |
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[473] | 34 | %ifdef MODULE_8BIT_IDE |
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| 35 | |
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| 36 | ;-------------------------------------------------------------------- |
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| 37 | ; IdePioBlock_ReadFromXtideRev1 |
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| 38 | ; Parameters: |
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| 39 | ; CX: Block size in 512 byte sectors |
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| 40 | ; DX: IDE Data port address |
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| 41 | ; ES:DI: Normalized ptr to buffer to receive data |
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| 42 | ; Returns: |
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| 43 | ; Nothing |
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| 44 | ; Corrupts registers: |
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| 45 | ; AX, BX, CX |
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| 46 | ;-------------------------------------------------------------------- |
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| 47 | ALIGN JUMP_ALIGN |
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| 48 | IdePioBlock_ReadFromXtideRev1: |
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| 49 | UNROLL_SECTORS_IN_CX_TO_OWORDS |
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| 50 | mov bl, 8 ; Bit mask for toggling data low/high reg |
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| 51 | ALIGN JUMP_ALIGN |
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| 52 | .InswLoop: |
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| 53 | %rep 8 ; WORDs |
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| 54 | XTIDE_INSW |
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| 55 | %endrep |
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| 56 | loop .InswLoop |
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| 57 | ret |
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| 58 | |
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| 59 | |
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| 60 | ;-------------------------------------------------------------------- |
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[545] | 61 | ; IdePioBlock_ReadFrom8bitDataPort |
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| 62 | ; |
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| 63 | ; 8-bit PIO from a single data port. |
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| 64 | ; |
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[473] | 65 | ; Parameters: |
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[558] | 66 | ; CX: Block size in 512 byte sectors |
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| 67 | ; DX: IDE Data port address |
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[473] | 68 | ; ES:DI: Normalized ptr to buffer to receive data |
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| 69 | ; Returns: |
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| 70 | ; Nothing |
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| 71 | ; Corrupts registers: |
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| 72 | ; AX, BX, CX |
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| 73 | ;-------------------------------------------------------------------- |
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| 74 | ALIGN JUMP_ALIGN |
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[545] | 75 | IdePioBlock_ReadFrom8bitDataPort: |
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| 76 | %ifdef USE_186 |
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| 77 | shl cx, 9 ; Sectors to BYTEs |
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| 78 | rep insb |
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| 79 | ret |
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| 80 | %else ; If 8088/8086 |
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[473] | 81 | UNROLL_SECTORS_IN_CX_TO_OWORDS |
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| 82 | ALIGN JUMP_ALIGN |
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| 83 | .ReadNextOword: |
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[545] | 84 | %rep 16 ; BYTEs |
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| 85 | in al, dx ; Read BYTE |
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| 86 | stosb ; Store BYTE to [ES:DI] |
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[473] | 87 | %endrep |
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[545] | 88 | loop .ReadNextOword |
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| 89 | ret |
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[473] | 90 | %endif |
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| 91 | |
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[545] | 92 | %endif ; MODULE_8BIT_IDE |
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[473] | 93 | |
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[545] | 94 | |
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[473] | 95 | ;-------------------------------------------------------------------- |
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[545] | 96 | ; IdePioBlock_ReadFrom16bitDataPort |
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| 97 | ; |
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| 98 | ; 16-bit PIO from a single data port. |
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| 99 | ; |
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[473] | 100 | ; Parameters: |
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[558] | 101 | ; CX: Block size in 512 byte sectors |
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| 102 | ; DX: IDE Data port address |
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[473] | 103 | ; ES:DI: Normalized ptr to buffer to receive data |
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| 104 | ; Returns: |
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| 105 | ; Nothing |
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| 106 | ; Corrupts registers: |
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| 107 | ; AX, BX, CX |
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| 108 | ;-------------------------------------------------------------------- |
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| 109 | ALIGN JUMP_ALIGN |
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[545] | 110 | IdePioBlock_ReadFrom16bitDataPort: |
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[473] | 111 | %ifdef USE_186 |
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[558] | 112 | xchg cl, ch ; Sectors to WORDs |
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[545] | 113 | rep insw |
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[473] | 114 | ret |
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| 115 | |
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| 116 | %else ; If 8088/8086 |
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| 117 | UNROLL_SECTORS_IN_CX_TO_OWORDS |
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| 118 | ALIGN JUMP_ALIGN |
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| 119 | .ReadNextOword: |
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[545] | 120 | %rep 8 ; WORDs |
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[558] | 121 | in ax, dx ; Read WORD |
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| 122 | stosw ; Store WORD to [ES:DI] |
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[473] | 123 | %endrep |
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| 124 | loop .ReadNextOword |
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| 125 | ret |
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| 126 | %endif |
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| 127 | |
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| 128 | |
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| 129 | ;-------------------------------------------------------------------- |
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[545] | 130 | ALIGN JUMP_ALIGN |
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| 131 | IdePioBlock_ReadFrom32bitDataPort: |
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| 132 | db 0C1h ; SHL |
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| 133 | db 0E1h ; CX |
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| 134 | db 7 ; 7 (Sectors to DWORDs) |
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| 135 | rep |
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| 136 | db 66h ; Override operand size to 32-bit |
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| 137 | db 6Dh ; INSW/INSD |
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| 138 | ret |
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| 139 | |
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| 140 | |
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| 141 | |
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| 142 | ; -------------------------------------------------------------------------------------------------- |
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| 143 | ; |
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| 144 | ; WRITE routines follow |
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| 145 | ; |
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| 146 | ; -------------------------------------------------------------------------------------------------- |
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| 147 | |
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| 148 | %ifdef MODULE_8BIT_IDE |
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| 149 | |
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| 150 | ;-------------------------------------------------------------------- |
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[473] | 151 | ; IdePioBlock_WriteToXtideRev1 |
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| 152 | ; Parameters: |
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[558] | 153 | ; CX: Block size in 512-byte sectors |
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| 154 | ; DX: IDE Data port address |
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[473] | 155 | ; ES:SI: Normalized ptr to buffer containing data |
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| 156 | ; Returns: |
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| 157 | ; Nothing |
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| 158 | ; Corrupts registers: |
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| 159 | ; AX, BX, CX, DX |
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| 160 | ;-------------------------------------------------------------------- |
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| 161 | ALIGN JUMP_ALIGN |
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| 162 | IdePioBlock_WriteToXtideRev1: |
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| 163 | push ds |
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| 164 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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| 165 | mov bl, 8 ; Bit mask for toggling data low/high reg |
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| 166 | push es ; Copy ES... |
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| 167 | pop ds ; ...to DS |
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| 168 | ALIGN JUMP_ALIGN |
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| 169 | .OutswLoop: |
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| 170 | %rep 4 ; WORDs |
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| 171 | XTIDE_OUTSW |
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| 172 | %endrep |
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| 173 | loop .OutswLoop |
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| 174 | pop ds |
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| 175 | ret |
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| 176 | |
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| 177 | |
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| 178 | ;-------------------------------------------------------------------- |
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| 179 | ; IdePioBlock_WriteToXtideRev2 or rev 1 with swapped A0 and A3 (chuck-mod) |
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| 180 | ; Parameters: |
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[558] | 181 | ; CX: Block size in 512-byte sectors |
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| 182 | ; DX: IDE Data port address |
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[473] | 183 | ; ES:SI: Normalized ptr to buffer containing data |
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| 184 | ; Returns: |
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| 185 | ; Nothing |
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| 186 | ; Corrupts registers: |
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| 187 | ; AX, BX, CX, DX |
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| 188 | ;-------------------------------------------------------------------- |
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| 189 | ALIGN JUMP_ALIGN |
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| 190 | IdePioBlock_WriteToXtideRev2: |
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| 191 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[558] | 192 | push ds |
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| 193 | push es ; Copy ES... |
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| 194 | pop ds ; ...to DS |
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[473] | 195 | ALIGN JUMP_ALIGN |
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| 196 | .WriteNextQword: |
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| 197 | %rep 4 ; WORDs |
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[545] | 198 | XTIDE_MOD_OUTSW ; special macro |
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[473] | 199 | %endrep |
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| 200 | loop .WriteNextQword |
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| 201 | pop ds |
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| 202 | ret |
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| 203 | |
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| 204 | |
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| 205 | ;-------------------------------------------------------------------- |
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[545] | 206 | ; IdePioBlock_WriteTo8bitDataPort |
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[473] | 207 | ; Parameters: |
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[558] | 208 | ; CX: Block size in 512-byte sectors |
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| 209 | ; DX: IDE Data port address |
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[473] | 210 | ; ES:SI: Normalized ptr to buffer containing data |
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| 211 | ; Returns: |
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| 212 | ; Nothing |
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| 213 | ; Corrupts registers: |
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| 214 | ; AX, BX, CX, DX |
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| 215 | ;-------------------------------------------------------------------- |
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| 216 | ALIGN JUMP_ALIGN |
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| 217 | IdePioBlock_WriteTo8bitDataPort: |
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| 218 | %ifdef USE_186 |
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| 219 | shl cx, 9 ; Sectors to BYTEs |
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| 220 | es ; Source is ES segment |
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| 221 | rep outsb |
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| 222 | ret |
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| 223 | |
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| 224 | %else ; If 8088/8086 |
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[545] | 225 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[558] | 226 | push ds |
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| 227 | ;mov ax, es |
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| 228 | ;mov ds, ax ; move es to ds via ax (does this run faster on 8088?) |
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| 229 | push es |
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| 230 | pop ds |
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[473] | 231 | ALIGN JUMP_ALIGN |
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[545] | 232 | .WriteNextQword: |
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| 233 | %rep 8 ; BYTEs |
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| 234 | lodsb ; Load BYTE from [DS:SI] |
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| 235 | out dx, al ; Write BYTE |
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[473] | 236 | %endrep |
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[545] | 237 | loop .WriteNextQword |
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[473] | 238 | pop ds |
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| 239 | ret |
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| 240 | %endif |
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| 241 | |
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| 242 | %endif ; MODULE_8BIT_IDE |
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| 243 | |
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| 244 | |
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| 245 | ;-------------------------------------------------------------------- |
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[545] | 246 | ; IdePioBlock_WriteTo16bitDataPort Normal 16-bit IDE, XT-CFv3 in BIU Mode |
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[473] | 247 | ; IdePioBlock_WriteTo32bitDataPort VLB/PCI 32-bit IDE |
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| 248 | ; Parameters: |
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[558] | 249 | ; CX: Block size in 512-byte sectors |
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| 250 | ; DX: IDE Data port address |
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[473] | 251 | ; ES:SI: Normalized ptr to buffer containing data |
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| 252 | ; Returns: |
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| 253 | ; Nothing |
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| 254 | ; Corrupts registers: |
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| 255 | ; AX, BX, CX, DX |
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| 256 | ;-------------------------------------------------------------------- |
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| 257 | ALIGN JUMP_ALIGN |
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| 258 | IdePioBlock_WriteTo16bitDataPort: |
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[545] | 259 | %ifdef USE_186 |
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[473] | 260 | xchg cl, ch ; Sectors to WORDs |
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| 261 | es ; Source is ES segment |
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[545] | 262 | rep outsw |
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[473] | 263 | ret |
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| 264 | |
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[545] | 265 | %else ; If 8088/8086 |
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| 266 | UNROLL_SECTORS_IN_CX_TO_QWORDS |
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| 267 | push ds |
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| 268 | ;mov ax, es |
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| 269 | ;mov ds, ax ; move es to ds via ax (does this run faster on 8088?) |
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| 270 | push es |
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| 271 | pop ds |
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| 272 | ALIGN JUMP_ALIGN |
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| 273 | .WriteNextQword: |
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| 274 | %rep 4 ; WORDs |
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[558] | 275 | lodsw ; Load WORD from [DS:SI] |
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| 276 | out dx, ax ; Write WORD |
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[545] | 277 | %endrep |
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| 278 | loop .WriteNextQword |
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| 279 | pop ds |
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| 280 | ret |
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| 281 | %endif ; if/else USE_186 |
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| 282 | |
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[473] | 283 | ;-------------------------------------------------------------------- |
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| 284 | ALIGN JUMP_ALIGN |
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| 285 | IdePioBlock_WriteTo32bitDataPort: |
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[480] | 286 | db 0C1h ; SHL |
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| 287 | db 0E1h ; CX |
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| 288 | db 7 ; 7 (Sectors to DWORDs) |
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[473] | 289 | es ; Source is ES segment |
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| 290 | rep |
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| 291 | db 66h ; Override operand size to 32-bit |
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| 292 | db 6Fh ; OUTSW/OUTSD |
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| 293 | ret |
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