source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc @ 400

Last change on this file since 400 was 400, checked in by aitotat@…, 12 years ago

Changes to XTIDE Universal BIOS:

  • Moved 8-bit device support to MODULE_8BIT_IDE.
  • JR-IDE/ISA support requires a lot less bytes.
  • AT builds now always use full operating mode.
File size: 6.6 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Defines for ROMVARS struct containing variables stored
3;                   in BIOS ROM.
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 ROMVARS_INC
22%define ROMVARS_INC
23
24; ROM Variables. Written to the ROM image before flashing.
25struc ROMVARS
26    .wRomSign           resb    2   ; ROM Signature (AA55h)
27    .bRomSize           resb    1   ; ROM size in 512 byte blocks
28    .rgbJump            resb    3   ; First instruction to ROM init (jmp)
29
30    .rgbSign            resb    8   ; Signature for XTIDE Configurator Program
31    .szTitle            resb    31  ; BIOS title string
32    .szVersion          resb    25  ; BIOS version string
33
34    .wFlags             resb    2   ; Word for ROM flags
35    .wDisplayMode       resb    2   ; Display mode for boot menu
36    .wfDisplayBootMenu:             ; Zero = no Boot Menu, non-zero = Boot Menu timeout
37    .wBootTimeout       resb    2   ; Boot Menu selection timeout in system timer ticks
38    .bIdeCnt            resb    1   ; Number of available IDE controllers
39    .bBootDrv           resb    1   ; Default drive to boot from
40    .bMinFddCnt         resb    1   ; Minimum number of Floppy Drives
41    .bStealSize         resb    1   ; Number of 1kB blocks stolen from 640kB base RAM
42    .bIdleTimeout       resb    1   ; Standby timer value
43
44    .ideVarsBegin:
45    .ideVars0           resb    IDEVARS_size
46    .ideVars1           resb    IDEVARS_size
47    .ideVars2           resb    IDEVARS_size
48    .ideVars3           resb    IDEVARS_size
49
50%ifdef MODULE_SERIAL
51    .ideVarsSerialAuto  resb    IDEVARS_size
52%endif
53
54    .ideVarsEnd:
55endstruc
56
57%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
58    %if ROMVARS.ideVarsEnd & 0xff00 <> 0
59        %error ".ideVars structures must fit within the first 256 bytes of the ROM image"
60    %endif
61    %if (ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin) = 0
62        %error "there must be at least one .ideVars structure, it would be bizarre if this were not true, but it is assumed in the ah0h reset code."
63    %endif
64%endif
65
66; Bit defines for ROMVARS.wFlags
67FLG_ROMVARS_FULLMODE                EQU (1<<0)  ; Full operating mode (steals base RAM, supports EBIOS etc.)
68FLG_ROMVARS_SERIAL_SCANDETECT       EQU (1<<3)  ; Scan COM ports at the end of drive detection.  Can also be invoked
69                                                ; by holding down the ALT key at the end of drive detection.
70                                                ; (Conveniently, this is 8, a fact we exploit when testing the bit)
71
72; Here in case the configuration needs to know functionality is present
73FLG_ROMVARS_MODULE_FEATURE_SETS         EQU (1<<5)
74FLG_ROMVARS_MODULE_8BIT_IDE             EQU (1<<6)
75FLG_ROMVARS_MODULE_JRIDE                EQU (1<<7)
76FLG_ROMVARS_MODULE_ADVANCED_ATA         EQU (1<<8)
77FLG_ROMVARS_MODULE_BOOT_MENU            EQU (1<<9)
78FLG_ROMVARS_MODULE_EBIOS                EQU (1<<10)
79FLG_ROMVARS_MODULE_HOTKEYS              EQU (1<<11)
80FLG_ROMVARS_MODULE_IRQ                  EQU (1<<12)
81FLG_ROMVARS_MODULE_SERIAL               EQU (1<<13)
82FLG_ROMVARS_MODULE_SERIAL_FLOPPY        EQU (1<<14)
83FLG_ROMVARS_MODULE_STRINGS_COMPRESSED   EQU (1<<15)
84
85
86; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes)
87DEFAULT_TEXT_MODE       EQU 4
88
89
90; Controller specific variables
91struc IDEVARS
92;;; Word 0
93    .wSerialPortAndBaud:                    ; Serial connection port (low, divided by 4) and baud rate divisor (high)
94    .wPort:                                 ; IDE Base Port for Command Block (usual) Registers
95    .bSerialPort                resb    1
96    .bSerialBaud                resb    1
97
98;;; Word 1
99    .wPortCtrl:
100    .bSerialUnused              resb    1   ; IDE Base Port for Control Block Registers
101
102    .wSerialCOMPortCharAndDevice:           ; In DetectPrint, we grab the COM Port char and Device at the same time
103    .bSerialCOMPortChar         resb    1   ; Serial connection COM port number/letter
104
105;;; Word 2
106    .bDevice                    resb    1   ; Device type
107
108    .bIRQ                       resb    1   ; Interrupt Request Number
109
110;;; And more...
111    .drvParamsMaster            resb    DRVPARAMS_size
112    .drvParamsSlave             resb    DRVPARAMS_size
113endstruc
114
115%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
116    %if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice
117        %error "IDEVARS.bSerialCOMPortChar needs to come immediately before IDEVARS.bDevice so that both bytes can be fetched at the same time inside DetectPrint.asm"
118    %endif
119%endif
120
121; Default values for Port and PortCtrl, shared with the configurator
122;
123DEVICE_XTIDE_DEFAULT_PORT               EQU     300h
124DEVICE_XTIDE_DEFAULT_PORTCTRL           EQU     (DEVICE_XTIDE_DEFAULT_PORT + 8h)
125
126DEVICE_ATA_PRIMARY_PORT                 EQU     1F0h
127DEVICE_ATA_PRIMARY_PORTCTRL             EQU     (DEVICE_ATA_PRIMARY_PORT + 200h)
128
129DEVICE_ATA_SECONDARY_PORT               EQU     170h
130DEVICE_ATA_SECONDARY_PORTCTRL           EQU     (DEVICE_ATA_SECONDARY_PORT + 200h)
131
132DEVICE_ATA_TERTIARY_PORT                EQU     1E8h
133DEVICE_ATA_TERTIARY_PORTCTRL            EQU     (DEVICE_ATA_TERTIARY_PORT + 200h)
134
135DEVICE_ATA_QUATERNARY_PORT              EQU     168h
136DEVICE_ATA_QUATERNARY_PORTCTRL          EQU     (DEVICE_ATA_QUATERNARY_PORT + 200h)
137
138
139; Device types for IDEVARS.bDevice
140;
141DEVICE_8BIT_JRIDE_ISA                   EQU (0<<1)  ; JR-IDE/ISA (must be 0)
142DEVICE_8BIT_FAST_XTIDE                  EQU (1<<1)  ; CPLD v2 project (must be 1 or 2)
143DEVICE_8BIT_XTIDE_REV2                  EQU (2<<1)  ; Or rev 1 with swapped A0 and A3 (must be 1 or 2)
144DEVICE_8BIT_XTIDE_REV1                  EQU (3<<1)  ; Must be 4
145COUNT_OF_8BIT_IDE_DEVICES               EQU 4
146
147DEVICE_16BIT_ATA                        EQU (COUNT_OF_8BIT_IDE_DEVICES<<1)
148DEVICE_32BIT_ATA                        EQU ((COUNT_OF_8BIT_IDE_DEVICES+1)<<1)
149COUNT_OF_16BIT_IDE_DEVICES              EQU 2
150COUNT_OF_ALL_IDE_DEVICES                EQU (COUNT_OF_8BIT_IDE_DEVICES + COUNT_OF_16BIT_IDE_DEVICES)
151
152DEVICE_SERIAL_PORT                      EQU (COUNT_OF_ALL_IDE_DEVICES<<1)
153
154
155
156; Master/Slave drive specific parameters
157struc DRVPARAMS
158    .wFlags         resb    2   ; Drive flags
159    .dwMaximumLBA:              ; User specified maximum number of sectors
160    .wCylinders     resb    2   ; User specified cylinders (1...16383)
161    .wHeadsAndSectors:
162    .bHeads         resb    1   ; User specified Heads (1...16)
163    .bSect          resb    1   ; User specified Sectors per track (1...63)
164endstruc
165
166; Bit defines for DRVPARAMS.wFlags
167MASK_DRVPARAMS_WRITECACHE   EQU (3<<0)  ; Drive internal write cache settings (must start at bit 0)
168FLG_DRVPARAMS_BLOCKMODE     EQU (1<<2)  ; Enable Block mode transfers
169FLG_DRVPARAMS_USERCHS       EQU (1<<3)  ; User specified P-CHS values
170FLG_DRVPARAMS_USERLBA       EQU (1<<4)  ; User specified LBA values
171
172; Drive Write Cache values for DRVPARAMS.wFlags.MASK_DRVPARAMS_WRITECACHE
173DEFAULT_WRITE_CACHE         EQU 0       ; Must be 0
174DISABLE_WRITE_CACHE         EQU 1
175ENABLE_WRITE_CACHE          EQU 2
176
177%endif ; ROMVARS_INC
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