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

     /* 
      * Mach Operating System
      * Copyright (c) 1993,1991,1990 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        reboot.h,v $
     * Revision 2.8  93/03/11  13:46:40  danner
     *      u_long -> u_int.
     *      [93/03/09            danner]
     * 
     * Revision 2.7  92/05/21  17:25:11  jfriedl
     *      Appended 'U' to constants that would otherwise be signed.
     *      [92/05/16            jfriedl]
     * 
     * Revision 2.6  91/06/19  11:59:44  rvb
     *      Second byte of boothowto is flags for "startup" program.
     *      [91/06/18            rvb]
     *      Add ifndef ASSEMBLER so that vax_init.s can include it.
     *      [91/06/11            rvb]
     * 
     * Revision 2.5  91/05/14  17:40:11  mrt
     *      Correcting copyright
     * 
     * Revision 2.4  91/02/05  17:56:48  mrt
     *      Changed to new Mach copyright
     *      [91/02/01  17:49:12  mrt]
     * 
     * Revision 2.3  90/08/27  22:12:56  dbg
     *      Added definitions used by Mach Kernel: RB_DEBUGGER, RB_UNIPROC,
     *      RB_NOBOOTRC, RB_ALTBOOT.  Moved RB_KDB to 0x04 (Mach value).
     *      Removed RB_RDONLY, RB_DUMP, RB_NOSYNC.
     *      [90/08/14            dbg]
     * 
     */
    
    /*
     * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms are permitted
     * provided that the above copyright notice and this paragraph are
     * duplicated in all such forms and that any documentation,
     * advertising materials, and other materials related to such
     * distribution and use acknowledge that the software was developed
     * by the University of California, Berkeley.  The name of the
     * University may not be used to endorse or promote products derived
     * from this software without specific prior written permission.
     * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
     * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     *
     *      @(#)reboot.h    7.5 (Berkeley) 6/27/88
     */
    
    #ifndef _SYS_REBOOT_H_
    #define _SYS_REBOOT_H_
    
    /*
     * Arguments to reboot system call.
     * These are converted to switches, and passed to startup program,
     * and on to init.
     */
    #define RB_AUTOBOOT     0       /* flags for system auto-booting itself */
    
    #define RB_ASKNAME      0x01    /* -a: ask for file name to reboot from */
    #define RB_SINGLE       0x02    /* -s: reboot to single user only */
    #define RB_KDB          0x04    /* -d: kernel debugger symbols loaded */
    #define RB_HALT         0x08    /* -h: enter KDB at bootup */
                                    /*     for host_reboot(): don't reboot,
                                           just halt */
    #define RB_INITNAME     0x10    /* -i: name given for /etc/init (unused) */
    #define RB_DFLTROOT     0x20    /*     use compiled-in rootdev */
    #define RB_NOBOOTRC     0x20    /* -b: don't run /etc/rc.boot */
    #define RB_ALTBOOT      0x40    /*     use /boot.old vs /boot */
    #define RB_UNIPROC      0x80    /* -u: start only one processor */
    
    #define RB_SHIFT        8       /* second byte is for ux */
   
   #define RB_DEBUGGER     0x1000  /*     for host_reboot(): enter kernel
                                          debugger from user level */
   
   /*
    * Constants for converting boot-style device number to type,
    * adaptor (uba, mba, etc), unit number and partition number.
    * Type (== major device number) is in the low byte
    * for backward compatibility.  Except for that of the "magic
    * number", each mask applies to the shifted value.
    * Format:
    *       (4) (4) (4) (4)  (8)     (8)
    *      --------------------------------
    *      |MA | AD| CT| UN| PART  | TYPE |
    *      --------------------------------
    */
   #define B_ADAPTORSHIFT          24
   #define B_ADAPTORMASK           0x0f
   #define B_ADAPTOR(val)          (((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
   #define B_CONTROLLERSHIFT       20
   #define B_CONTROLLERMASK        0xf
   #define B_CONTROLLER(val)       (((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
   #define B_UNITSHIFT             16
   #define B_UNITMASK              0xf
   #define B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
   #define B_PARTITIONSHIFT        8
   #define B_PARTITIONMASK         0xff
   #define B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
   #define B_TYPESHIFT             0
   #define B_TYPEMASK              0xff
   #define B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)
   
   #define B_MAGICMASK     ((u_int)0xf0000000U)
   #define B_DEVMAGIC      ((u_int)0xa0000000U)
   
   #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
           (((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
           ((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
           ((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
   
   
   #ifdef  KERNEL
   #ifndef ASSEMBLER
   extern int boothowto;
   #endif  ASSEMBLER
   #endif
   
   #endif  /* _SYS_REBOOT_H_ */

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