1
2/*
3 *  GRUB  --  GRand Unified Bootloader
4 *  Copyright (C) 2001  Free Software Foundation, Inc.
5 *
6 *  This program is free software; you can redistribute it and/or modify
7 *  it under the terms of the GNU General Public License as published by
8 *  the Free Software Foundation; either version 2 of the License, or
9 *  (at your option) any later version.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21/* command-line parameter defines */
22#define RB_ASKNAME      0x01	/* ask for file name to reboot from */
23#define RB_SINGLE       0x02	/* reboot to single user only */
24#define RB_NOSYNC       0x04	/* dont sync before reboot */
25#define RB_HALT         0x08	/* don't reboot, just halt */
26#define RB_INITNAME     0x10	/* name given for /etc/init (unused) */
27#define RB_DFLTROOT     0x20	/* use compiled-in rootdev */
28#define RB_KDB          0x40	/* give control to kernel debugger */
29#define RB_RDONLY       0x80	/* mount root fs read-only */
30#define RB_DUMP         0x100	/* dump kernel memory before reboot */
31#define RB_MINIROOT     0x200	/* mini-root present in memory at boot time */
32#define RB_CONFIG       0x400	/* invoke user configuration routing */
33#define RB_VERBOSE      0x800	/* print all potentially useful info */
34#define RB_SERIAL       0x1000	/* user serial port as console */
35#define RB_CDROM        0x2000	/* use cdrom as root */
36#define RB_GDB		0x8000	/* use GDB remote debugger instead of DDB */
37#define RB_MUTE		0x10000	/* Come up with the console muted */
38#define RB_MULTIPLE	0x20000000	/* Use multiple consoles */
39
40#define RB_BOOTINFO     0x80000000	/* have `struct bootinfo *' arg */
41
42/*
43 * Constants for converting boot-style device number to type,
44 * adaptor (uba, mba, etc), unit number and partition number.
45 * Type (== major device number) is in the low byte
46 * for backward compatibility.  Except for that of the "magic
47 * number", each mask applies to the shifted value.
48 * Format:
49 *       (4) (4) (4) (4)  (8)     (8)
50 *      --------------------------------
51 *      |MA | AD| CT| UN| PART  | TYPE |
52 *      --------------------------------
53 */
54#define B_ADAPTORSHIFT          24
55#define B_CONTROLLERSHIFT       20
56#define B_UNITSHIFT             16
57#define B_PARTITIONSHIFT        8
58#define B_TYPESHIFT             0
59
60#define B_DEVMAGIC      ((unsigned long)0xa0000000)
61
62#define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
63        (((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
64        ((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
65        ((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
66
67
68/* Only change the version number if you break compatibility. */
69#define BOOTINFO_VERSION        1
70
71#define N_BIOS_GEOM             8
72
73/*
74 * A zero bootinfo field often means that there is no info available.
75 * Flags are used to indicate the validity of fields where zero is a
76 * normal value.
77 */
78struct bootinfo
79  {
80    unsigned int bi_version;
81    unsigned char *bi_kernelname;
82    struct nfs_diskless *bi_nfs_diskless;
83    /* End of fields that are always present. */
84#define bi_endcommon            bi_n_bios_used
85    unsigned int bi_n_bios_used;
86    unsigned long bi_bios_geom[N_BIOS_GEOM];
87    unsigned int bi_size;
88    unsigned char bi_memsizes_valid;
89    unsigned char bi_bios_dev;
90    unsigned char bi_pad[2];
91    unsigned long bi_basemem;
92    unsigned long bi_extmem;
93    unsigned long bi_symtab;
94    unsigned long bi_esymtab;
95  };
96