[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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| 6 | ; XTIDE Universal BIOS and Associated Tools |
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| 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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| 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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[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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[363] | 25 | ; UNROLL_SECTORS_IN_CX_TO_QWORDS |
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| 26 | ; Parameters: |
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| 27 | ; CX: Number of sectors in block |
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| 28 | ; Returns: |
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| 29 | ; CX: Number of QWORDs in block |
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| 30 | ; Corrupts registers: |
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| 31 | ; Nothing |
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| 32 | ;-------------------------------------------------------------------- |
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| 33 | %macro UNROLL_SECTORS_IN_CX_TO_QWORDS 0 |
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| 34 | %ifdef USE_186 |
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| 35 | shl cx, 6 |
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| 36 | %else |
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| 37 | xchg cl, ch ; Sectors to WORDs (SHL CX, 8) |
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| 38 | shr cx, 1 |
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| 39 | shr cx, 1 |
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| 40 | %endif |
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| 41 | %endmacro |
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| 42 | |
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| 43 | |
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| 44 | ;-------------------------------------------------------------------- |
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[152] | 45 | ; Emulates INSW for XTIDE. |
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[3] | 46 | ; |
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[152] | 47 | ; XTIDE_INSW |
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[3] | 48 | ; Parameters: |
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[370] | 49 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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[152] | 50 | ; DX: XTIDE Data Low Register address |
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[3] | 51 | ; ES:DI: Ptr to destination buffer |
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| 52 | ; Returns: |
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| 53 | ; ES:DI: Incremented/decremented for next word |
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| 54 | ; Corrupts registers: |
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| 55 | ; AL, FLAGS |
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| 56 | ;-------------------------------------------------------------------- |
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[152] | 57 | %macro XTIDE_INSW 0 |
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[3] | 58 | %ifdef USE_186 ; INS instruction available |
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| 59 | insb ; Load low byte from port DX to [ES:DI] |
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[370] | 60 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 61 | insb ; Load high byte from port DX to [ES:DI] |
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[370] | 62 | xor dl, bl ; Restore to IDE Data Register |
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[3] | 63 | %else ; If 8088/8086 |
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| 64 | in al, dx ; Load low byte from port |
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[370] | 65 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 66 | stosb ; Store byte to [ES:DI] |
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| 67 | in al, dx ; Load high byte from port |
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[370] | 68 | xor dl, bl ; Restore to IDE Data Register |
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[3] | 69 | stosb ; Store byte to [ES:DI] |
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| 70 | %endif |
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| 71 | %endmacro |
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| 72 | |
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| 73 | |
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| 74 | ;-------------------------------------------------------------------- |
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[152] | 75 | ; Emulates OUTSW for XTIDE. |
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[3] | 76 | ; |
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[152] | 77 | ; XTIDE_OUTSW |
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[3] | 78 | ; Parameters: |
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[370] | 79 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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[152] | 80 | ; DX: XTIDE Data Low Register address |
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[3] | 81 | ; DS:SI: Ptr to source buffer |
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| 82 | ; Returns: |
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| 83 | ; SI: Incremented/decremented for next word |
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| 84 | ; Corrupts registers: |
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| 85 | ; AX, FLAGS |
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| 86 | ;-------------------------------------------------------------------- |
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[152] | 87 | %macro XTIDE_OUTSW 0 |
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[3] | 88 | %ifdef USE_186 ; OUTS instruction available |
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| 89 | lodsb ; Load low byte from [DS:SI] to AL |
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[370] | 90 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 91 | outsb ; Output high byte from [DS:SI] |
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[370] | 92 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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[3] | 93 | out dx, al ; Output low byte from AL |
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| 94 | %else ; If 8088/8086 |
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| 95 | lodsw ; Load word from [DS:SI] |
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[370] | 96 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 97 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 98 | out dx, al ; Output high byte |
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[370] | 99 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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[3] | 100 | mov al, ah ; Copy low byte to AL |
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| 101 | out dx, al ; Output low byte |
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| 102 | %endif |
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| 103 | %endmacro |
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| 104 | |
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| 105 | |
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[152] | 106 | ;-------------------------------------------------------------------- |
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| 107 | ; Emulates OUTSW for modified XTIDE. |
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| 108 | ; |
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| 109 | ; XTIDE_MOD_OUTSW |
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| 110 | ; Parameters: |
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| 111 | ; DX: XTIDE Data Low Register address |
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| 112 | ; DS:SI: Ptr to source buffer |
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| 113 | ; Returns: |
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| 114 | ; SI: Incremented/decremented for next word |
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| 115 | ; Corrupts registers: |
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| 116 | ; AX, FLAGS |
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| 117 | ;-------------------------------------------------------------------- |
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| 118 | %macro XTIDE_MOD_OUTSW 0 |
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| 119 | %ifdef USE_186 ; OUTS instruction available |
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| 120 | lodsb ; Load low byte from [DS:SI] to AL |
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| 121 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 122 | outsb ; Output high byte from [DS:SI] |
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| 123 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 124 | out dx, al ; Output low byte from AL |
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| 125 | %else ; If 8088/8086 |
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| 126 | lodsw ; Load word from [DS:SI] |
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| 127 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 128 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 129 | out dx, al ; Output high byte |
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| 130 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 131 | mov al, ah ; Copy low byte to AL |
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| 132 | out dx, al ; Output low byte |
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| 133 | %endif |
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| 134 | %endmacro |
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| 135 | |
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| 136 | |
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[3] | 137 | %endif ; IDE_8BIT_INC |
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