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reboot.h revision 1.6 
      1 /*	$NetBSD: reboot.h,v 1.6 1994/06/29 06:45:01 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)reboot.h	8.1 (Berkeley) 6/2/93
     36  */
     37 
     38 /*
     39  * Arguments to reboot system call.
     40  * These are passed to boot program in r11,
     41  * and on to init.
     42  */
     43 #define	RB_AUTOBOOT	0	/* flags for system auto-booting itself */
     44 
     45 #define	RB_ASKNAME	0x01	/* ask for file name to reboot from */
     46 #define	RB_SINGLE	0x02	/* reboot to single user only */
     47 #define	RB_NOSYNC	0x04	/* dont sync before reboot */
     48 #define	RB_HALT		0x08	/* don't reboot, just halt */
     49 #define	RB_INITNAME	0x10	/* name given for /etc/init (unused) */
     50 #define	RB_DFLTROOT	0x20	/* use compiled-in rootdev */
     51 #define	RB_KDB		0x40	/* give control to kernel debugger */
     52 #define	RB_RDONLY	0x80	/* mount root fs read-only */
     53 #define	RB_DUMP		0x100	/* dump kernel memory before reboot */
     54 #define	RB_MINIROOT	0x200	/* mini-root present in memory at boot time */
     55 
     56 /*
     57  * Constants for converting boot-style device number to type,
     58  * adaptor (uba, mba, etc), unit number and partition number.
     59  * Type (== major device number) is in the low byte
     60  * for backward compatibility.  Except for that of the "magic
     61  * number", each mask applies to the shifted value.
     62  * Format:
     63  *	 (4) (4) (4) (4)  (8)     (8)
     64  *	--------------------------------
     65  *	|MA | AD| CT| UN| PART  | TYPE |
     66  *	--------------------------------
     67  */
     68 #define	B_ADAPTORSHIFT		24
     69 #define	B_ADAPTORMASK		0x0f
     70 #define	B_ADAPTOR(val)		(((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
     71 #define B_CONTROLLERSHIFT	20
     72 #define B_CONTROLLERMASK	0xf
     73 #define	B_CONTROLLER(val)	(((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
     74 #define B_UNITSHIFT		16
     75 #define B_UNITMASK		0xf
     76 #define	B_UNIT(val)		(((val) >> B_UNITSHIFT) & B_UNITMASK)
     77 #define B_PARTITIONSHIFT	8
     78 #define B_PARTITIONMASK		0xff
     79 #define	B_PARTITION(val)	(((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
     80 #define	B_TYPESHIFT		0
     81 #define	B_TYPEMASK		0xff
     82 #define	B_TYPE(val)		(((val) >> B_TYPESHIFT) & B_TYPEMASK)
     83 
     84 #define	B_MAGICMASK	((u_long)0xf0000000)
     85 #define	B_DEVMAGIC	((u_long)0xa0000000)
     86 
     87 #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
     88 	(((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
     89 	((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
     90 	((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
     91