90 lines
3.7 KiB
C
90 lines
3.7 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1996 Erich Boleyn <erich@uruk.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* command-line parameter defines */
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#define RB_ASKNAME 0x01 /* ask for file name to reboot from */
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#define RB_SINGLE 0x02 /* reboot to single user only */
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#define RB_NOSYNC 0x04 /* dont sync before reboot */
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#define RB_HALT 0x08 /* don't reboot, just halt */
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#define RB_INITNAME 0x10 /* name given for /etc/init (unused) */
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#define RB_DFLTROOT 0x20 /* use compiled-in rootdev */
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#define RB_KDB 0x40 /* give control to kernel debugger */
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#define RB_RDONLY 0x80 /* mount root fs read-only */
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#define RB_DUMP 0x100 /* dump kernel memory before reboot */
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#define RB_MINIROOT 0x200 /* mini-root present in memory at boot time */
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#define RB_CONFIG 0x400 /* invoke user configuration routing */
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#define RB_VERBOSE 0x800 /* print all potentially useful info */
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#define RB_SERIAL 0x1000 /* user serial port as console */
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#define RB_CDROM 0x2000 /* use cdrom as root */
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#define RB_BOOTINFO 0x80000000 /* have `struct bootinfo *' arg */
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/*
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* Constants for converting boot-style device number to type,
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* adaptor (uba, mba, etc), unit number and partition number.
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* Type (== major device number) is in the low byte
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* for backward compatibility. Except for that of the "magic
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* number", each mask applies to the shifted value.
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* Format:
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* (4) (4) (4) (4) (8) (8)
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* --------------------------------
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* |MA | AD| CT| UN| PART | TYPE |
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* --------------------------------
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*/
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#define B_ADAPTORSHIFT 24
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#define B_CONTROLLERSHIFT 20
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#define B_UNITSHIFT 16
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#define B_PARTITIONSHIFT 8
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#define B_TYPESHIFT 0
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#define B_DEVMAGIC ((unsigned long)0xa0000000)
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#define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
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(((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
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((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
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((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
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/* Only change the version number if you break compatibility. */
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#define BOOTINFO_VERSION 1
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#define N_BIOS_GEOM 8
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/*
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* A zero bootinfo field often means that there is no info available.
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* Flags are used to indicate the validity of fields where zero is a
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* normal value.
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*/
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struct bootinfo {
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unsigned int bi_version;
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unsigned char *bi_kernelname;
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struct nfs_diskless *bi_nfs_diskless;
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/* End of fields that are always present. */
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#define bi_endcommon bi_n_bios_used
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unsigned int bi_n_bios_used;
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unsigned long bi_bios_geom[N_BIOS_GEOM];
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unsigned int bi_size;
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unsigned char bi_memsizes_valid;
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unsigned char bi_pad[3];
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unsigned long bi_basemem;
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unsigned long bi_extmem;
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unsigned long bi_symtab;
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unsigned long bi_esymtab;
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};
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