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