source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc@ 421

Last change on this file since 421 was 421, checked in by aitotat@…, 13 years ago

Changes to XTIDE Universal BIOS:

  • Addressing modes are now NORMAL, LARGE and LBA.
  • L-CHS parameters are now generated differently for drives with 8192 or less cylinders.
File size: 5.2 KB
Line 
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
25struc DPT ; 8 or 18 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 .bPchsHeads resb 1 ; (1...16)
33 .wLchsCylinders resb 2 ; (1...1027, yes 1027)
34 .wLchsHeadsAndSectors:
35 .bLchsHeads resb 1 ; (1...255)
36 .bLchsSectorsPerTrack resb 1 ; (1...63)
37
38%ifdef MODULE_EBIOS
39 .twLbaSectors resb 6 ; 48-bit sector count for LBA addressing
40 .wPchsCylinders resb 2
41 .bPchsSectorsPerTrack resb 1
42 resb 1
43%endif
44endstruc
45
46 ; Bit definitions for DPT.bFlagsLow
47 MASKL_DPT_CHS_SHIFT_COUNT EQU (3<<0) ; Bits 0...1, P-CHS to L-CHS bit shift count (0...3)
48 MASKL_DPT_ADDRESSING_MODE EQU (3<<ADDRESSING_MODE_FIELD_POSITION) ; Bits 2...3, NORMAL, LARGE or Assisted LBA addressing mode
49 FLGL_DPT_ASSISTED_LBA EQU (1<<(ADDRESSING_MODE_FIELD_POSITION+1))
50 FLGL_DPT_SLAVE EQU FLG_DRVNHEAD_DRV ; Bit 4, Drive is a Slave Drive
51%ifdef MODULE_IRQ
52 FLGL_DPT_ENABLE_IRQ EQU (1<<5) ; Bit 5, Enable IRQ
53%endif
54%ifdef MODULE_EBIOS
55 FLGL_DPT_LBA_AND_EBIOS_SUPPORTED EQU FLG_DRVNHEAD_LBA ; Bit 6, Drive supports LBA and so EBIOS functions can be supported
56 FLGL_DPT_LBA48 EQU (1<<7) ; Bit 7, Drive supports 48-bit LBA (Must be bit 7!)
57%endif
58
59 ; Addressing modes for DPT.bFlagsLow
60 ADDRESSING_MODE_FIELD_POSITION EQU 2
61 ADDRESSING_MODE_NORMAL EQU 0
62 ADDRESSING_MODE_LARGE EQU 1
63 ADDRESSING_MODE_ASSISTED_LBA EQU 2 ; 28-bit or 48-bit LBA
64
65
66 ; Bit definitions for DPT.bFlagsHigh
67 FLGH_DPT_BLOCK_MODE_SUPPORTED EQU (1<<1) ; Bit 1, Use block transfer commands (must be bit 1!)
68%ifdef MODULE_SERIAL
69 FLGH_DPT_SERIAL_DEVICE EQU (1<<2) ; Bit 2, Serial Port Device
70%endif
71%ifdef MODULE_IRQ
72 FLGH_DPT_INTERRUPT_IN_SERVICE EQU (1<<3) ; Bit 3, Set when waiting for IRQ
73%endif
74%ifdef MODULE_FEATURE_SETS
75 FLGH_DPT_POWER_MANAGEMENT_SUPPORTED EQU (1<<5) ; Bit 4, Drive supports power management
76%endif
77%ifdef MODULE_ADVANCED_ATA
78 FLGH_DPT_IORDY EQU (1<<7) ; Bit 5, Controller and Drive supports IORDY
79%endif
80
81 ; Serial device only
82%ifdef MODULE_SERIAL_FLOPPY
83 FLGH_DPT_SERIAL_FLOPPY EQU (1<<4)
84 FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK EQU 0e0h
85 FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION EQU 5
86%endif
87
88
89
90; DPT for ATA devices
91struc DPT_ATA ; 8/18 bytes + 2 bytes = 10/20 bytes
92 .dpt resb DPT_size
93 .bBlockSize resb 1 ; Current block size in sectors (do not set to zero!)
94 .bDevice resb 1 ; Device Type from IDEVARS (overrided when 32-bit controller detected)
95endstruc
96
97
98
99; Additional variables needed to initialize and reset Advanced IDE Controllers.
100; EBDA must be reserved for DPTs when using these!
101%ifdef MODULE_ADVANCED_ATA
102struc DPT_ADVANCED_ATA ; 10/20 bytes + 8 bytes = 18/28 bytes
103 .dpt_ata resb DPT_ATA_size
104 .wControllerID resb 2 ; Controller specific ID WORD (from Advanced Controller detection)
105 .wControllerBasePort resb 2 ; Advanced Controller port (not IDE port)
106 .wMinPioCycleTime resb 2 ; Minimum PIO Cycle Time in ns
107 .bPioMode resb 1 ; Best supported PIO mode
108 .bInitError resb 1 ; Flags for initialization errors
109endstruc
110
111 ; Flags for DPT_ADVANCED_ATA.bInitError
112 FLG_INITERROR_FAILED_TO_SELECT_DRIVE EQU (1<<0)
113 FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS EQU (1<<1)
114 FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE EQU (1<<2)
115 FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE EQU (1<<3)
116 FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE EQU (1<<4)
117 FLG_INITERROR_FAILED_TO_SET_PIO_MODE EQU (1<<5)
118 FLG_INITERROR_FAILED_TO_INITIALIZE_STANDBY_TIMER EQU (1<<6)
119%endif
120
121
122; DPT for Serial devices
123%ifdef MODULE_SERIAL
124struc DPT_SERIAL ; 8/18 bytes + 2 bytes = 10/20 bytes
125 .dpt resb DPT_size
126 .wSerialPortAndBaud:
127 .bSerialPort resb 1 ; Serial connection I/O port address, divided by 4
128 .bSerialBaud resb 1 ; Serial connection baud rate divisor
129endstruc
130%endif
131
132
133; This is the common size for all DPTs. All DPTs must be equal size.
134%ifdef MODULE_ADVANCED_ATA
135 LARGEST_DPT_SIZE EQU DPT_ADVANCED_ATA_size
136%else
137 LARGEST_DPT_SIZE EQU DPT_ATA_size
138%endif
139
140
141 ; Number of Sectors per Track is fixed to 63 for LBA assist calculation.
142 ; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads)
143 MAX_LCHS_CYLINDERS EQU 1024
144 LBA_ASSIST_SPT EQU 63
145
146
147%endif ; CUSTOMDPT_INC
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