[150] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Macros for accessing data port(s) on 8-bit |
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| 3 | ; IDE controllers. |
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[376] | 4 | |
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| 5 | ; |
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[445] | 6 | ; XTIDE Universal BIOS and Associated Tools |
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[376] | 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 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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[445] | 13 | ; |
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[376] | 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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[445] | 17 | ; GNU General Public License for more details. |
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[376] | 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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[3] | 21 | %ifndef IDE_8BIT_INC |
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| 22 | %define IDE_8BIT_INC |
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| 23 | |
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| 24 | ;-------------------------------------------------------------------- |
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[442] | 25 | ; UNROLL_SECTORS_IN_CX_TO_DWORDS |
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[363] | 26 | ; UNROLL_SECTORS_IN_CX_TO_QWORDS |
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[445] | 27 | ; UNROLL_SECTORS_IN_CX_TO_OWORDS |
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[363] | 28 | ; Parameters: |
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| 29 | ; CX: Number of sectors in block |
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| 30 | ; Returns: |
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[445] | 31 | ; CX: Number of DWORDs, QWORDs or OWORDs in block |
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[363] | 32 | ; Corrupts registers: |
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| 33 | ; Nothing |
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| 34 | ;-------------------------------------------------------------------- |
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[442] | 35 | %macro UNROLL_SECTORS_IN_CX_TO_DWORDS 0 |
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| 36 | %ifdef USE_186 |
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| 37 | shl cx, 7 |
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| 38 | %else |
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| 39 | xchg cl, ch ; Sectors to WORDs (SHL CX, 8) |
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| 40 | shr cx, 1 |
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| 41 | %endif |
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| 42 | %endmacro |
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| 43 | |
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[363] | 44 | %macro UNROLL_SECTORS_IN_CX_TO_QWORDS 0 |
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| 45 | %ifdef USE_186 |
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| 46 | shl cx, 6 |
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| 47 | %else |
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[442] | 48 | UNROLL_SECTORS_IN_CX_TO_DWORDS |
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[363] | 49 | shr cx, 1 |
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| 50 | %endif |
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| 51 | %endmacro |
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| 52 | |
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[445] | 53 | %macro UNROLL_SECTORS_IN_CX_TO_OWORDS 0 |
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| 54 | %ifdef USE_186 |
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| 55 | shl cx, 5 |
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| 56 | %else |
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[491] | 57 | ; UNROLL_SECTORS_IN_CX_TO_QWORDS |
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| 58 | ; shr cx, 1 |
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| 59 | mov ch, cl ; 2 bytes shorter but possibly slower |
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| 60 | mov cl, 3 |
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| 61 | shr cx, cl |
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[445] | 62 | %endif |
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| 63 | %endmacro |
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[363] | 64 | |
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[445] | 65 | |
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[363] | 66 | ;-------------------------------------------------------------------- |
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[152] | 67 | ; Emulates INSW for XTIDE. |
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[3] | 68 | ; |
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[152] | 69 | ; XTIDE_INSW |
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[3] | 70 | ; Parameters: |
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[370] | 71 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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[152] | 72 | ; DX: XTIDE Data Low Register address |
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[3] | 73 | ; ES:DI: Ptr to destination buffer |
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| 74 | ; Returns: |
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| 75 | ; ES:DI: Incremented/decremented for next word |
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| 76 | ; Corrupts registers: |
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| 77 | ; AL, FLAGS |
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| 78 | ;-------------------------------------------------------------------- |
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[152] | 79 | %macro XTIDE_INSW 0 |
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[3] | 80 | %ifdef USE_186 ; INS instruction available |
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| 81 | insb ; Load low byte from port DX to [ES:DI] |
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[370] | 82 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 83 | insb ; Load high byte from port DX to [ES:DI] |
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[370] | 84 | xor dl, bl ; Restore to IDE Data Register |
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[3] | 85 | %else ; If 8088/8086 |
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| 86 | in al, dx ; Load low byte from port |
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[370] | 87 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 88 | stosb ; Store byte to [ES:DI] |
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| 89 | in al, dx ; Load high byte from port |
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[370] | 90 | xor dl, bl ; Restore to IDE Data Register |
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[3] | 91 | stosb ; Store byte to [ES:DI] |
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| 92 | %endif |
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| 93 | %endmacro |
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| 94 | |
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| 95 | |
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| 96 | ;-------------------------------------------------------------------- |
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[152] | 97 | ; Emulates OUTSW for XTIDE. |
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[3] | 98 | ; |
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[152] | 99 | ; XTIDE_OUTSW |
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[3] | 100 | ; Parameters: |
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[370] | 101 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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[152] | 102 | ; DX: XTIDE Data Low Register address |
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[3] | 103 | ; DS:SI: Ptr to source buffer |
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| 104 | ; Returns: |
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| 105 | ; SI: Incremented/decremented for next word |
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| 106 | ; Corrupts registers: |
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| 107 | ; AX, FLAGS |
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| 108 | ;-------------------------------------------------------------------- |
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[152] | 109 | %macro XTIDE_OUTSW 0 |
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[3] | 110 | %ifdef USE_186 ; OUTS instruction available |
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| 111 | lodsb ; Load low byte from [DS:SI] to AL |
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[370] | 112 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 113 | outsb ; Output high byte from [DS:SI] |
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[370] | 114 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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[3] | 115 | out dx, al ; Output low byte from AL |
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| 116 | %else ; If 8088/8086 |
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| 117 | lodsw ; Load word from [DS:SI] |
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[370] | 118 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 119 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 120 | out dx, al ; Output high byte |
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[370] | 121 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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[3] | 122 | mov al, ah ; Copy low byte to AL |
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| 123 | out dx, al ; Output low byte |
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| 124 | %endif |
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| 125 | %endmacro |
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| 126 | |
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| 127 | |
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[152] | 128 | ;-------------------------------------------------------------------- |
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| 129 | ; Emulates OUTSW for modified XTIDE. |
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| 130 | ; |
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| 131 | ; XTIDE_MOD_OUTSW |
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| 132 | ; Parameters: |
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| 133 | ; DX: XTIDE Data Low Register address |
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| 134 | ; DS:SI: Ptr to source buffer |
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| 135 | ; Returns: |
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| 136 | ; SI: Incremented/decremented for next word |
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| 137 | ; Corrupts registers: |
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| 138 | ; AX, FLAGS |
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| 139 | ;-------------------------------------------------------------------- |
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| 140 | %macro XTIDE_MOD_OUTSW 0 |
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| 141 | %ifdef USE_186 ; OUTS instruction available |
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| 142 | lodsb ; Load low byte from [DS:SI] to AL |
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| 143 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 144 | outsb ; Output high byte from [DS:SI] |
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| 145 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 146 | out dx, al ; Output low byte from AL |
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| 147 | %else ; If 8088/8086 |
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| 148 | lodsw ; Load word from [DS:SI] |
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| 149 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 150 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 151 | out dx, al ; Output high byte |
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| 152 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 153 | mov al, ah ; Copy low byte to AL |
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| 154 | out dx, al ; Output low byte |
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| 155 | %endif |
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| 156 | %endmacro |
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| 157 | |
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| 158 | |
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[3] | 159 | %endif ; IDE_8BIT_INC |
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