Home | History | Annotate | Download | only in stage2
      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  */
     78 struct 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