source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc @ 376

Last change on this file since 376 was 376, checked in by gregli@…, 12 years ago

WIDE checkin... Added copyright and license information to sorce files, as per the GPL instructions for usage.

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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   ; 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)
42endstruc
43
44; Bit definitions for DPT.bFlagsLow
45MASKL_DPT_CHS_SHIFT_COUNT       EQU (7<<0)  ; Bits 0...3, P-CHS to L-CHS bit shift count (0...4)
46FLGL_DPT_SLAVE                  EQU FLG_DRVNHEAD_DRV    ; (1<<4), Drive is slave drive
47MASKL_DPT_ADDRESSING_MODE       EQU (3<<5)  ; Bits 5..6, Addressing Mode (bit 6 == FLG_DRVNHEAD_LBA)
48FLGL_DPT_ENABLE_IRQ             EQU (1<<7)
49
50; Bit definitions for DPT.bFlagsHigh
51FLGH_DPT_REVERSED_A0_AND_A3     EQU (1<<0)  ; XTIDE mod, Address lines 0 and 3 reversed
52FLGH_DPT_BLOCK_MODE_SUPPORTED   EQU (1<<1)  ; Use block transfer commands (must be bit 1!)
53%ifdef MODULE_SERIAL
54FLGH_DPT_SERIAL_DEVICE          EQU (1<<2)  ; Serial Port Device
55%endif
56FLGH_DPT_INTERRUPT_IN_SERVICE   EQU (1<<3)  ; Set when waiting for IRQ
57
58; IDE device only
59%ifdef MODULE_ADVANCED_ATA
60FLGH_DPT_IORDY                  EQU (1<<7)  ; Controller and Drive supports IORDY
61%endif
62
63; Serial device only
64FLGH_DPT_SERIAL_FLOPPY                      EQU (1<<4)
65FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK            EQU 0e0h
66FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION  EQU 5
67
68; Addressing modes for DPT.wFlags
69ADDRESSING_MODE_FIELD_POSITION  EQU     5
70ADDRESSING_MODE_LCHS            EQU     0   ; L-CHS Addressing Mode (NORMAL in many other BIOSes)
71ADDRESSING_MODE_PCHS            EQU     1   ; P-CHS Addressing Mode (LARGE in many other BIOSes)
72ADDRESSING_MODE_LBA28           EQU     2   ; 28-bit LBA Addressing Mode
73ADDRESSING_MODE_LBA48           EQU     3   ; 48-bit LBA Addressing Mode
74
75
76; DPT for ATA devices
77struc 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
81endstruc
82
83; Flags for BOOTMENUINFO.wInitErrorFlags
84FLG_INITERROR_FAILED_TO_SELECT_DRIVE                EQU     (1<<0)
85FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS   EQU     (1<<1)
86FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE             EQU     (1<<2)
87FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE           EQU     (1<<3)
88FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE              EQU     (1<<4)
89FLG_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
95struc 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)
102endstruc
103%endif
104
105
106; DPT for Serial devices
107%ifdef MODULE_SERIAL
108struc 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
113endstruc
114%endif
115
116
117; This is the common size for all DPTs. All DPTs must be equal size.
118%ifdef MODULE_ADVANCED_ATA
119LARGEST_DPT_SIZE                EQU     DPT_ADVANCED_ATA_size
120%else
121LARGEST_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)
127MAX_LCHS_CYLINDERS              EQU     1024
128LBA_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
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