The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/reboot.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1993,1991,1990 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        reboot.h,v $
   29  * Revision 2.8  93/03/11  13:46:40  danner
   30  *      u_long -> u_int.
   31  *      [93/03/09            danner]
   32  * 
   33  * Revision 2.7  92/05/21  17:25:11  jfriedl
   34  *      Appended 'U' to constants that would otherwise be signed.
   35  *      [92/05/16            jfriedl]
   36  * 
   37  * Revision 2.6  91/06/19  11:59:44  rvb
   38  *      Second byte of boothowto is flags for "startup" program.
   39  *      [91/06/18            rvb]
   40  *      Add ifndef ASSEMBLER so that vax_init.s can include it.
   41  *      [91/06/11            rvb]
   42  * 
   43  * Revision 2.5  91/05/14  17:40:11  mrt
   44  *      Correcting copyright
   45  * 
   46  * Revision 2.4  91/02/05  17:56:48  mrt
   47  *      Changed to new Mach copyright
   48  *      [91/02/01  17:49:12  mrt]
   49  * 
   50  * Revision 2.3  90/08/27  22:12:56  dbg
   51  *      Added definitions used by Mach Kernel: RB_DEBUGGER, RB_UNIPROC,
   52  *      RB_NOBOOTRC, RB_ALTBOOT.  Moved RB_KDB to 0x04 (Mach value).
   53  *      Removed RB_RDONLY, RB_DUMP, RB_NOSYNC.
   54  *      [90/08/14            dbg]
   55  * 
   56  */
   57 
   58 /*
   59  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
   60  * All rights reserved.
   61  *
   62  * Redistribution and use in source and binary forms are permitted
   63  * provided that the above copyright notice and this paragraph are
   64  * duplicated in all such forms and that any documentation,
   65  * advertising materials, and other materials related to such
   66  * distribution and use acknowledge that the software was developed
   67  * by the University of California, Berkeley.  The name of the
   68  * University may not be used to endorse or promote products derived
   69  * from this software without specific prior written permission.
   70  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   71  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   72  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   73  *
   74  *      @(#)reboot.h    7.5 (Berkeley) 6/27/88
   75  */
   76 
   77 #ifndef _SYS_REBOOT_H_
   78 #define _SYS_REBOOT_H_
   79 
   80 /*
   81  * Arguments to reboot system call.
   82  * These are converted to switches, and passed to startup program,
   83  * and on to init.
   84  */
   85 #define RB_AUTOBOOT     0       /* flags for system auto-booting itself */
   86 
   87 #define RB_ASKNAME      0x01    /* -a: ask for file name to reboot from */
   88 #define RB_SINGLE       0x02    /* -s: reboot to single user only */
   89 #define RB_KDB          0x04    /* -d: kernel debugger symbols loaded */
   90 #define RB_HALT         0x08    /* -h: enter KDB at bootup */
   91                                 /*     for host_reboot(): don't reboot,
   92                                        just halt */
   93 #define RB_INITNAME     0x10    /* -i: name given for /etc/init (unused) */
   94 #define RB_DFLTROOT     0x20    /*     use compiled-in rootdev */
   95 #define RB_NOBOOTRC     0x20    /* -b: don't run /etc/rc.boot */
   96 #define RB_ALTBOOT      0x40    /*     use /boot.old vs /boot */
   97 #define RB_UNIPROC      0x80    /* -u: start only one processor */
   98 
   99 #define RB_SHIFT        8       /* second byte is for ux */
  100 
  101 #define RB_DEBUGGER     0x1000  /*     for host_reboot(): enter kernel
  102                                        debugger from user level */
  103 
  104 /*
  105  * Constants for converting boot-style device number to type,
  106  * adaptor (uba, mba, etc), unit number and partition number.
  107  * Type (== major device number) is in the low byte
  108  * for backward compatibility.  Except for that of the "magic
  109  * number", each mask applies to the shifted value.
  110  * Format:
  111  *       (4) (4) (4) (4)  (8)     (8)
  112  *      --------------------------------
  113  *      |MA | AD| CT| UN| PART  | TYPE |
  114  *      --------------------------------
  115  */
  116 #define B_ADAPTORSHIFT          24
  117 #define B_ADAPTORMASK           0x0f
  118 #define B_ADAPTOR(val)          (((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
  119 #define B_CONTROLLERSHIFT       20
  120 #define B_CONTROLLERMASK        0xf
  121 #define B_CONTROLLER(val)       (((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
  122 #define B_UNITSHIFT             16
  123 #define B_UNITMASK              0xf
  124 #define B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
  125 #define B_PARTITIONSHIFT        8
  126 #define B_PARTITIONMASK         0xff
  127 #define B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
  128 #define B_TYPESHIFT             0
  129 #define B_TYPEMASK              0xff
  130 #define B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)
  131 
  132 #define B_MAGICMASK     ((u_int)0xf0000000U)
  133 #define B_DEVMAGIC      ((u_int)0xa0000000U)
  134 
  135 #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
  136         (((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
  137         ((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
  138         ((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
  139 
  140 
  141 #ifdef  KERNEL
  142 #ifndef ASSEMBLER
  143 extern int boothowto;
  144 #endif  ASSEMBLER
  145 #endif
  146 
  147 #endif  /* _SYS_REBOOT_H_ */

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