This is xnu-8019. See this file in:
/*
 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1982, 1986, 1988, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)reboot.h	8.3 (Berkeley) 12/13/94
 */

#ifndef _SYS_REBOOT_H_
#define _SYS_REBOOT_H_

#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <stdint.h>

/*
 * Arguments to reboot system call.
 */

#ifdef __APPLE_API_PRIVATE
#define RB_AUTOBOOT     0       /* flags for system auto-booting itself */

#define RB_ASKNAME      0x01    /* ask for file name to reboot from */
#define RB_SINGLE       0x02    /* reboot to single user only */
#define RB_NOSYNC       0x04    /* dont sync before reboot */
#define RB_HALT         0x08    /* don't reboot, just halt */
#define RB_INITNAME     0x10    /* name given for /etc/init */
#define RB_DFLTROOT     0x20    /* use compiled-in rootdev */
#define RB_ALTBOOT      0x40    /* use /boot.old vs /boot */
#define RB_UNIPROC      0x80    /* don't start slaves */
#define RB_SAFEBOOT     0x100   /* booting safe */
#define RB_UPSDELAY 0x200   /* Delays restart by 5 minutes */
#define RB_QUICK        0x400   /* quick and ungraceful reboot with file system caches flushed*/
#define RB_PANIC        0x800   /* panic the kernel */
#define RB_PANIC_ZPRINT 0x1000   /* add zprint info to panic string */

#ifndef KERNEL
__BEGIN_DECLS
/* userspace reboot control */
int usrctl(uint32_t flags);
/* The normal reboot syscall. */
int reboot(int howto);
/* Used with RB_PANIC to panic the kernel from userspace with a message.
 * Requires an entitlement on Release. */
int reboot_np(int howto, const char *message);
__END_DECLS
#endif

#endif /* __APPLE_API_PRIVATE */

#ifdef __APPLE_API_OBSOLETE
/*
 * 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      0xff
#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     0xf0000000
#define B_DEVMAGIC      0xa0000000

#define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
	(((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
	((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
	((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)

#endif /* __APPLE_API_OBSOLETE */

#ifdef BSD_KERNEL_PRIVATE

__BEGIN_DECLS
int     reboot_kernel(int, char *);
__END_DECLS

#define PROC_SHUTDOWN_LOG "/var/log/kernel-shutdown.log"

#endif /* BSD_KERNEL_PRIVATE */

#if KERNEL_PRIVATE
__BEGIN_DECLS
int get_system_inshutdown(void);
__END_DECLS
#endif /* KERNEL_PRIVATE */

#endif  /* _SYS_REBOOT_H_ */