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reboot.h revision 1.3 
      1 /*
      2  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
      3  * 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  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)reboot.h	7.6 (Berkeley) 6/28/90
     34  *	$Id: reboot.h,v 1.3 1993/05/20 16:22:55 cgd Exp $
     35  */
     36 
     37 #ifndef _SYS_REBOOT_H_
     38 #define _SYS_REBOOT_H_
     39 
     40 /*
     41  * Arguments to reboot system call.
     42  * These are passed to boot program in r11,
     43  * and on to init.
     44  */
     45 #define	RB_AUTOBOOT	0	/* flags for system auto-booting itself */
     46 
     47 #define	RB_ASKNAME	0x01	/* ask for file name to reboot from */
     48 #define	RB_SINGLE	0x02	/* reboot to single user only */
     49 #define	RB_NOSYNC	0x04	/* dont sync before reboot */
     50 #define	RB_HALT		0x08	/* don't reboot, just halt */
     51 #define	RB_INITNAME	0x10	/* name given for /etc/init (unused) */
     52 #define	RB_DFLTROOT	0x20	/* use compiled-in rootdev */
     53 #define	RB_KDB		0x40	/* give control to kernel debugger */
     54 #define	RB_RDONLY	0x80	/* mount root fs read-only */
     55 #define	RB_DUMP		0x100	/* dump kernel memory before reboot */
     56 
     57 /*
     58  * Constants for converting boot-style device number to type,
     59  * adaptor (uba, mba, etc), unit number and partition number.
     60  * Type (== major device number) is in the low byte
     61  * for backward compatibility.  Except for that of the "magic
     62  * number", each mask applies to the shifted value.
     63  * Format:
     64  *	 (4) (4) (4) (4)  (8)     (8)
     65  *	--------------------------------
     66  *	|MA | AD| CT| UN| PART  | TYPE |
     67  *	--------------------------------
     68  */
     69 #define	B_ADAPTORSHIFT		24
     70 #define	B_ADAPTORMASK		0x0f
     71 #define	B_ADAPTOR(val)		(((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
     72 #define B_CONTROLLERSHIFT	20
     73 #define B_CONTROLLERMASK	0xf
     74 #define	B_CONTROLLER(val)	(((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
     75 #define B_UNITSHIFT		16
     76 #define B_UNITMASK		0xf
     77 #define	B_UNIT(val)		(((val) >> B_UNITSHIFT) & B_UNITMASK)
     78 #define B_PARTITIONSHIFT	8
     79 #define B_PARTITIONMASK		0xff
     80 #define	B_PARTITION(val)	(((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
     81 #define	B_TYPESHIFT		0
     82 #define	B_TYPEMASK		0xff
     83 #define	B_TYPE(val)		(((val) >> B_TYPESHIFT) & B_TYPEMASK)
     84 
     85 #define	B_MAGICMASK	((u_long)0xf0000000)
     86 #define	B_DEVMAGIC	((u_long)0xa0000000)
     87 
     88 #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
     89 	(((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
     90 	((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
     91 	((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
     92 
     93 #endif /* !_SYS_REBOOT_H_ */
     94