sysdeps/unix/bsd/sys/reboot.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)reboot.h    8.1 (Berkeley) 6/2/93
  30  */
  31
  32 /*
  33  * Arguments to reboot system call.
  34  * These are passed to boot program in r11,
  35  * and on to init.
  36  */
  37 #define RB_AUTOBOOT     0       /* flags for system auto-booting itself */
  38
  39 #define RB_ASKNAME      0x01    /* ask for file name to reboot from */
  40 #define RB_SINGLE       0x02    /* reboot to single user only */
  41 #define RB_NOSYNC       0x04    /* don't sync before reboot */
  42 #define RB_HALT         0x08    /* don't reboot, just halt */
  43 #define RB_INITNAME     0x10    /* name given for /etc/init (unused) */
  44 #define RB_DFLTROOT     0x20    /* use compiled-in rootdev */
  45 #define RB_KDB          0x40    /* give control to kernel debugger */
  46 #define RB_RDONLY       0x80    /* mount root fs read-only */
  47 #define RB_DUMP         0x100   /* dump kernel memory before reboot */
  48 #define RB_MINIROOT     0x200   /* mini-root present in memory at boot time */
  49
  50 /*
  51  * Constants for converting boot-style device number to type,
  52  * adaptor (uba, mba, etc), unit number and partition number.
  53  * Type (== major device number) is in the low byte
  54  * for backward compatibility.  Except for that of the "magic
  55  * number", each mask applies to the shifted value.
  56  * Format:
  57  *       (4) (4) (4) (4)  (8)     (8)
  58  *      --------------------------------
  59  *      |MA | AD| CT| UN| PART  | TYPE |
  60  *      --------------------------------
  61  */
  62 #define B_ADAPTORSHIFT          24
  63 #define B_ADAPTORMASK           0x0f
  64 #define B_ADAPTOR(val)          (((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
  65 #define B_CONTROLLERSHIFT       20
  66 #define B_CONTROLLERMASK        0xf
  67 #define B_CONTROLLER(val)       (((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
  68 #define B_UNITSHIFT             16
  69 #define B_UNITMASK              0xf
  70 #define B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
  71 #define B_PARTITIONSHIFT        8
  72 #define B_PARTITIONMASK         0xff
  73 #define B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
  74 #define B_TYPESHIFT             0
  75 #define B_TYPEMASK              0xff
  76 #define B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)
  77
  78 #define B_MAGICMASK     ((u_long)0xf0000000)
  79 #define B_DEVMAGIC      ((u_long)0xa0000000)
  80
  81 #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
  82         (((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
  83         ((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
  84         ((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)