stage1.h revision 1650e5296608be8925d9831310c9ad3595fd6869 
1/*
2 *  GRUB  --  GRand Unified Bootloader
3 *  Copyright (C) 1999,2000,2002,2004   Free Software Foundation, Inc.
4 *
5 *  This program is free software; you can redistribute it and/or modify
6 *  it under the terms of the GNU General Public License as published by
7 *  the Free Software Foundation; either version 2 of the License, or
8 *  (at your option) any later version.
9 *
10 *  This program is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 *  GNU General Public License for more details.
14 *
15 *  You should have received a copy of the GNU General Public License
16 *  along with this program; if not, write to the Free Software
17 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#ifndef STAGE1_HEADER
21#define STAGE1_HEADER	1
22
23
24/* Define the version numbers here, so that Stage 1 can know them.  */
25#define COMPAT_VERSION_MAJOR	3
26#define COMPAT_VERSION_MINOR	2
27#define COMPAT_VERSION		((COMPAT_VERSION_MINOR << 8) \
28					| COMPAT_VERSION_MAJOR)
29
30/* The signature for bootloader.  */
31#define STAGE1_SIGNATURE	0xaa55
32
33/* The offset of the end of BPB (BIOS Parameter Block).  */
34#define STAGE1_BPBEND		0x3e
35
36/* The offset of the major version.  */
37#define STAGE1_VER_MAJ_OFFS	0x3e
38
39/* The offset of BOOT_DRIVE.  */
40#define STAGE1_BOOT_DRIVE	0x40
41
42/* The offset of FORCE_LBA.  */
43#define STAGE1_FORCE_LBA	0x41
44
45/* The offset of STAGE2_ADDRESS.  */
46#define STAGE1_STAGE2_ADDRESS	0x42
47
48/* The offset of STAGE2_SECTOR.  */
49#define STAGE1_STAGE2_SECTOR	0x44
50
51/* The offset of STAGE2_SEGMENT.  */
52#define STAGE1_STAGE2_SEGMENT	0x48
53
54/* The offset of BOOT_DRIVE_CHECK.  */
55#define STAGE1_BOOT_DRIVE_CHECK	0x4b
56
57/* The offset of a magic number used by Windows NT.  */
58#define STAGE1_WINDOWS_NT_MAGIC	0x1b8
59
60/* The offset of the start of the partition table.  */
61#define STAGE1_PARTSTART	0x1be
62
63/* The offset of the end of the partition table.  */
64#define STAGE1_PARTEND		0x1fe
65
66/* The stack segment.  */
67#define STAGE1_STACKSEG		0x2000
68
69/* The segment of disk buffer. The disk buffer MUST be 32K long and
70   cannot straddle a 64K boundary.  */
71#define STAGE1_BUFFERSEG	0x7000
72
73/* The address of drive parameters.  */
74#define STAGE1_DRP_ADDR		0x7f00
75
76/* The size of drive parameters.  */
77#define STAGE1_DRP_SIZE		0x42
78
79/* The flag for BIOS drive number to designate a hard disk vs. a
80   floppy.  */
81#define STAGE1_BIOS_HD_FLAG	0x80
82
83/* The drive number of an invalid drive.  */
84#define GRUB_INVALID_DRIVE	0xFF
85
86#endif /* ! STAGE1_HEADER */
87