[150] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Functions for managing IDEPACK struct. |
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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 | ; Section containing code |
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| 21 | SECTION .text |
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| 22 | |
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| 23 | ;-------------------------------------------------------------------- |
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| 24 | ; Idepack_FakeToSSBP |
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| 25 | ; Parameters: |
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| 26 | ; Nothing |
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| 27 | ; Returns: |
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| 28 | ; SS:BP: Ptr to IDEPACK |
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| 29 | ; Corrupts registers: |
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| 30 | ; AX |
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| 31 | ;-------------------------------------------------------------------- |
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| 32 | Idepack_FakeToSSBP: |
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| 33 | pop ax |
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[443] | 34 | sub sp, BYTE SIZE_OF_IDEPACK_WITHOUT_INTPACK |
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[150] | 35 | mov bp, sp |
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| 36 | jmp ax |
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| 37 | |
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[181] | 38 | |
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[150] | 39 | ;-------------------------------------------------------------------- |
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[165] | 40 | ; Idepack_ConvertDapToIdepackAndIssueCommandFromAH |
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| 41 | ; Parameters: |
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| 42 | ; AH: IDE command to issue |
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| 43 | ; BH: Timeout ticks |
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| 44 | ; BL: IDE Status Register flag to wait after command |
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| 45 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 46 | ; ES:SI: Ptr to DAP (EBIOS Disk Address Packet) |
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| 47 | ; SS:BP: Ptr to IDEPACK |
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| 48 | ; Returns: |
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| 49 | ; AH: INT 13h Error Code |
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[249] | 50 | ; CX: Number of successfully transferred sectors (for transfer commands) |
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[165] | 51 | ; CF: Cleared if success, Set if error |
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| 52 | ; Corrupts registers: |
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[249] | 53 | ; AL, BX, (CX), DX, SI, ES |
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[165] | 54 | ;-------------------------------------------------------------------- |
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[181] | 55 | %ifdef MODULE_EBIOS |
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[165] | 56 | ALIGN JUMP_ALIGN |
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| 57 | Idepack_ConvertDapToIdepackAndIssueCommandFromAH: |
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[224] | 58 | mov al, [es:si+DAP.wSectorCount] |
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[221] | 59 | mov [bp+IDEPACK.bSectorCount], al |
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[165] | 60 | mov [bp+IDEPACK.bCommand], ah |
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| 61 | |
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| 62 | mov al, [es:si+DAP.qwLBA] ; LBA byte 0 |
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| 63 | mov [bp+IDEPACK.bLbaLow], al |
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| 64 | mov ax, [es:si+DAP.qwLBA+1] ; LBA bytes 1 and 2 |
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| 65 | mov [bp+IDEPACK.wLbaMiddleAndHigh], ax |
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| 66 | mov ah, [es:si+DAP.qwLBA+3] ; LBA byte 3, LBA28 bits 24...27 |
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| 67 | mov [bp+IDEPACK.bLbaLowExt], ah |
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| 68 | mov cx, [es:si+DAP.qwLBA+4] ; LBA bytes 4 and 5 |
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| 69 | mov [bp+IDEPACK.wLbaMiddleAndHighExt], cx |
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| 70 | |
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| 71 | and ah, 0Fh ; Limit bits for LBA28 |
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[421] | 72 | call AccessDPT_GetDriveSelectByteForEbiosToAL |
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[165] | 73 | or al, ah |
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| 74 | mov [bp+IDEPACK.bDrvAndHead], al |
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[221] | 75 | |
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| 76 | ; Normalize data buffer pointer to ES:SI |
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[224] | 77 | mov ax, [es:si+DAP.wOffset] |
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[221] | 78 | mov cx, ax |
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| 79 | eSHR_IM ax, 4 ; Divide offset by 16 |
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[224] | 80 | add ax, [es:si+DAP.wSegment] ; Add segment |
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[221] | 81 | mov es, ax ; Segment normalized |
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| 82 | mov si, cx |
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| 83 | and si, BYTE 0Fh ; Offset normalized |
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[165] | 84 | jmp SHORT GetDeviceControlByteToIdepackAndStartTransfer |
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[421] | 85 | %endif ; MODULE_EBIOS |
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[165] | 86 | |
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[181] | 87 | |
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[165] | 88 | ;-------------------------------------------------------------------- |
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[150] | 89 | ; Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH |
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| 90 | ; Parameters: |
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| 91 | ; AH: IDE command to issue |
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[221] | 92 | ; AL: Number of sectors to transfer (for xfer commands) |
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[150] | 93 | ; BH: Timeout ticks |
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| 94 | ; BL: IDE Status Register flag to wait after command |
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| 95 | ; CH: Cylinder number, bits 7...0 |
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| 96 | ; CL: Bits 7...6: Cylinder number bits 9 and 8 |
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| 97 | ; Bits 5...0: Starting sector number (1...63) |
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| 98 | ; DH: Starting head number (0...255) |
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| 99 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[221] | 100 | ; ES:SI: Ptr to normalized data buffer (for xfer commands) |
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[218] | 101 | ; SS:BP: Ptr to IDEPACK (containing INTPACK) |
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[150] | 102 | ; Returns: |
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| 103 | ; AH: INT 13h Error Code |
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[249] | 104 | ; CX: Number of successfully transferred sectors (for transfer commands) |
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[150] | 105 | ; CF: Cleared if success, Set if error |
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| 106 | ; Corrupts registers: |
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[249] | 107 | ; AL, BX, (CX), DX |
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[150] | 108 | ;-------------------------------------------------------------------- |
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| 109 | ALIGN JUMP_ALIGN |
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| 110 | Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH: |
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[218] | 111 | mov [bp+IDEPACK.bSectorCount], al |
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[169] | 112 | mov [bp+IDEPACK.bCommand], ah |
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[181] | 113 | |
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[150] | 114 | push bx |
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[155] | 115 | call Address_OldInt13hAddressToIdeAddress |
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[421] | 116 | call AccessDPT_GetDriveSelectByteForOldInt13hToAL |
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[150] | 117 | or al, bh ; AL now has Drive and Head Select Byte |
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| 118 | mov [bp+IDEPACK.bDrvAndHead], al |
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| 119 | mov [bp+IDEPACK.bLbaLow], bl |
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| 120 | mov [bp+IDEPACK.wLbaMiddleAndHigh], cx |
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| 121 | pop bx |
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| 122 | |
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[165] | 123 | GetDeviceControlByteToIdepackAndStartTransfer: |
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[150] | 124 | call AccessDPT_GetDeviceControlByteToAL |
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| 125 | mov [bp+IDEPACK.bDeviceControl], al |
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[181] | 126 | jmp Device_OutputCommandWithParameters |
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[150] | 127 | |
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| 128 | |
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| 129 | ;-------------------------------------------------------------------- |
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| 130 | ; Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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| 131 | ; Parameters: |
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| 132 | ; BH: Timeout ticks |
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| 133 | ; BL: IDE Status Register flag to wait after command |
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| 134 | ; AL: IDE command to issue |
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| 135 | ; AH: Parameter to Drive and Head Select Register (Head bits only) |
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| 136 | ; DL: Parameter to Sector Count Register |
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| 137 | ; DH: Parameter to LBA Low / Sector Number Register |
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| 138 | ; CL: Parameter to LBA Middle / Cylinder Low Register |
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| 139 | ; CH: Parameter to LBA High / Cylinder High Register |
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| 140 | ; SI: Parameter to Features Register |
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| 141 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 142 | ; SS:BP: Ptr to IDEPACK |
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| 143 | ; Returns: |
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| 144 | ; AH: INT 13h Error Code |
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| 145 | ; CF: Cleared if success, Set if error |
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| 146 | ; Corrupts registers: |
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| 147 | ; AL, BX, CX, DX |
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| 148 | ;-------------------------------------------------------------------- |
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| 149 | ALIGN JUMP_ALIGN |
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| 150 | Idepack_StoreNonExtParametersAndIssueCommandFromAL: |
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| 151 | mov [bp+IDEPACK.bFeatures], si |
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| 152 | mov [bp+IDEPACK.bCommand], al |
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| 153 | mov [bp+IDEPACK.wSectorCountAndLbaLow], dx |
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| 154 | mov [bp+IDEPACK.wLbaMiddleAndHigh], cx |
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| 155 | |
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| 156 | ; Drive and Head select byte |
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| 157 | and ah, MASK_DRVNHEAD_HEAD ; Keep head bits only |
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[421] | 158 | call AccessDPT_GetDriveSelectByteForOldInt13hToAL |
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[150] | 159 | or al, ah |
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| 160 | mov [bp+IDEPACK.bDrvAndHead], al |
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| 161 | |
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| 162 | ; Device Control byte with interrupts disabled |
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[443] | 163 | mov BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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[150] | 164 | |
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| 165 | jmp Device_OutputCommandWithParameters |
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