xref: /illumos-gate/usr/src/grub/grub-0.97/stage1/stage1.h (revision 1b8adde7ba7d5e04395c141c5400dc2cffd7d809)
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