1 | ; Project name : XTIDE Universal BIOS |
---|
2 | ; Description : Defines for DPT structs containing custom |
---|
3 | ; Disk Parameter Table used by this BIOS. |
---|
4 | |
---|
5 | ; |
---|
6 | ; XTIDE Universal BIOS and Associated Tools |
---|
7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
---|
8 | ; |
---|
9 | ; This program is free software; you can redistribute it and/or modify |
---|
10 | ; it under the terms of the GNU General Public License as published by |
---|
11 | ; the Free Software Foundation; either version 2 of the License, or |
---|
12 | ; (at your option) any later version. |
---|
13 | ; |
---|
14 | ; This program is distributed in the hope that it will be useful, |
---|
15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | ; GNU General Public License for more details. |
---|
18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
---|
19 | ; |
---|
20 | |
---|
21 | %ifndef CUSTOMDPT_INC |
---|
22 | %define CUSTOMDPT_INC |
---|
23 | |
---|
24 | ; Base DPT for all device types |
---|
25 | struc DPT ; 10 bytes |
---|
26 | ; General Disk Parameter Table related |
---|
27 | .wFlags: |
---|
28 | .bFlagsLow resb 1 |
---|
29 | .bFlagsHigh resb 1 |
---|
30 | .bIdevarsOffset resb 1 ; Offset to IDEVARS for this drive |
---|
31 | |
---|
32 | ; IDE Drive related |
---|
33 | ; .bLbaHeads and .twLbaSectors are used for LBA addressing only. |
---|
34 | .bLbaHeads: resb 1 ; Number of LBA assisted heads (1...255) |
---|
35 | .twLbaSectors resb 2 ; 48-bit sector count for LBA addressing |
---|
36 | |
---|
37 | ; .wPchsCylinders and .bPchsSectors are used for CHS addressing only. |
---|
38 | .wPchsCylinders resb 2 ; Number of P-CHS Cylinders (1...16383) |
---|
39 | .wPchsHeadsAndSectors: |
---|
40 | .bPchsHeads resb 1 ; Number of P-CHS heads (1...16) |
---|
41 | .bPchsSectors resb 1 ; Number of P-CHS Sectors per Track (1...63) |
---|
42 | endstruc |
---|
43 | |
---|
44 | ; Bit definitions for DPT.bFlagsLow |
---|
45 | MASKL_DPT_CHS_SHIFT_COUNT EQU (7<<0) ; Bits 0...3, P-CHS to L-CHS bit shift count (0...4) |
---|
46 | FLGL_DPT_SLAVE EQU FLG_DRVNHEAD_DRV ; (1<<4), Drive is slave drive |
---|
47 | MASKL_DPT_ADDRESSING_MODE EQU (3<<5) ; Bits 5..6, Addressing Mode (bit 6 == FLG_DRVNHEAD_LBA) |
---|
48 | FLGL_DPT_ENABLE_IRQ EQU (1<<7) |
---|
49 | |
---|
50 | ; Bit definitions for DPT.bFlagsHigh |
---|
51 | FLGH_DPT_REVERSED_A0_AND_A3 EQU (1<<0) ; XTIDE mod, Address lines 0 and 3 reversed |
---|
52 | FLGH_DPT_BLOCK_MODE_SUPPORTED EQU (1<<1) ; Use block transfer commands (must be bit 1!) |
---|
53 | %ifdef MODULE_SERIAL |
---|
54 | FLGH_DPT_SERIAL_DEVICE EQU (1<<2) ; Serial Port Device |
---|
55 | %endif |
---|
56 | FLGH_DPT_INTERRUPT_IN_SERVICE EQU (1<<3) ; Set when waiting for IRQ |
---|
57 | |
---|
58 | ; IDE device only |
---|
59 | %ifdef MODULE_ADVANCED_ATA |
---|
60 | FLGH_DPT_IORDY EQU (1<<7) ; Controller and Drive supports IORDY |
---|
61 | %endif |
---|
62 | |
---|
63 | ; Serial device only |
---|
64 | FLGH_DPT_SERIAL_FLOPPY EQU (1<<4) |
---|
65 | FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK EQU 0e0h |
---|
66 | FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION EQU 5 |
---|
67 | |
---|
68 | ; Addressing modes for DPT.wFlags |
---|
69 | ADDRESSING_MODE_FIELD_POSITION EQU 5 |
---|
70 | ADDRESSING_MODE_LCHS EQU 0 ; L-CHS Addressing Mode (NORMAL in many other BIOSes) |
---|
71 | ADDRESSING_MODE_PCHS EQU 1 ; P-CHS Addressing Mode (LARGE in many other BIOSes) |
---|
72 | ADDRESSING_MODE_LBA28 EQU 2 ; 28-bit LBA Addressing Mode |
---|
73 | ADDRESSING_MODE_LBA48 EQU 3 ; 48-bit LBA Addressing Mode |
---|
74 | |
---|
75 | |
---|
76 | ; DPT for ATA devices |
---|
77 | struc DPT_ATA ; 10 + 2 bytes = 12 bytes |
---|
78 | .dpt resb DPT_size |
---|
79 | .bBlockSize resb 1 ; Current block size in sectors (do not set to zero!) |
---|
80 | .bInitError resb 1 |
---|
81 | endstruc |
---|
82 | |
---|
83 | ; Flags for BOOTMENUINFO.wInitErrorFlags |
---|
84 | FLG_INITERROR_FAILED_TO_SELECT_DRIVE EQU (1<<0) |
---|
85 | FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS EQU (1<<1) |
---|
86 | FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE EQU (1<<2) |
---|
87 | FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE EQU (1<<3) |
---|
88 | FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE EQU (1<<4) |
---|
89 | FLG_INITERROR_FAILED_TO_SET_PIO_MODE EQU (1<<5) |
---|
90 | |
---|
91 | |
---|
92 | ; Additional variables needed to initialize and reset Advanced IDE Controllers. |
---|
93 | ; EBDA must be reserved for DPTs when using these! |
---|
94 | %ifdef MODULE_ADVANCED_ATA |
---|
95 | struc DPT_ADVANCED_ATA |
---|
96 | .dpt_ata resb DPT_ATA_size |
---|
97 | .wControllerID resb 2 ; Controller specific ID WORD (from Advanced Controller detection) |
---|
98 | .wControllerBasePort resb 2 ; Advanced Controller port (not IDE port) |
---|
99 | .wMinPioCycleTime resb 2 ; Minimum PIO Cycle Time in ns |
---|
100 | .bPioMode resb 1 ; Best supported PIO mode |
---|
101 | .bDevice resb 1 ; Device Type from IDEVARS (overrided when 32-bit controller detected) |
---|
102 | endstruc |
---|
103 | %endif |
---|
104 | |
---|
105 | |
---|
106 | ; DPT for Serial devices |
---|
107 | %ifdef MODULE_SERIAL |
---|
108 | struc DPT_SERIAL |
---|
109 | .dpt resb DPT_size |
---|
110 | .wSerialPortAndBaud: |
---|
111 | .bSerialPort resb 1 ; Serial connection I/O port address, divided by 4 |
---|
112 | .bSerialBaud resb 1 ; Serial connection baud rate divisor |
---|
113 | endstruc |
---|
114 | %endif |
---|
115 | |
---|
116 | |
---|
117 | ; This is the common size for all DPTs. All DPTs must be equal size. |
---|
118 | %ifdef MODULE_ADVANCED_ATA |
---|
119 | LARGEST_DPT_SIZE EQU DPT_ADVANCED_ATA_size |
---|
120 | %else |
---|
121 | LARGEST_DPT_SIZE EQU DPT_ATA_size |
---|
122 | %endif |
---|
123 | |
---|
124 | |
---|
125 | ; Number of Sectors per Track is fixed to 63 for LBA assist calculation. |
---|
126 | ; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads) |
---|
127 | MAX_LCHS_CYLINDERS EQU 1024 |
---|
128 | LBA_ASSIST_SPT EQU 63 |
---|
129 | |
---|
130 | |
---|
131 | ;-------------------------------------------------------------------- |
---|
132 | ; LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS |
---|
133 | ; Parameters: |
---|
134 | ; DX:AX: Number of LBA cylinders |
---|
135 | ; Returns: |
---|
136 | ; AX: Number of L-CHS cylinders |
---|
137 | ; Corrupts registers: |
---|
138 | ; Nothing |
---|
139 | ;-------------------------------------------------------------------- |
---|
140 | %macro LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS 0 |
---|
141 | test dx, dx |
---|
142 | jnz SHORT %%LoadMaxValueToAX |
---|
143 | cmp ax, MAX_LCHS_CYLINDERS |
---|
144 | jb SHORT %%NoNeedToModify |
---|
145 | %%LoadMaxValueToAX: |
---|
146 | mov ax, MAX_LCHS_CYLINDERS |
---|
147 | %%NoNeedToModify: |
---|
148 | %endmacro |
---|
149 | |
---|
150 | |
---|
151 | %endif ; CUSTOMDPT_INC |
---|