xnu-201.tar.gz

[apple/xnu.git] / bsd / sys / systm.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1988, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * 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.
 *
 *	@(#)systm.h	8.7 (Berkeley) 3/29/95
 */
 
/*
 * The `securelevel' variable controls the security level of the system.
 * It can only be decreased by process 1 (/sbin/init).
 *
 * Security levels are as follows:
 *   -1	permannently insecure mode - always run system in level 0 mode.
 *    0	insecure mode - immutable and append-only flags make be turned off.
 *	All devices may be read or written subject to permission modes.
 *    1	secure mode - immutable and append-only flags may not be changed;
 *	raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
 *	read-only.
 *    2	highly secure mode - same as (1) plus raw disks are always
 *	read-only whether mounted or not. This level precludes tampering 
 *	with filesystems by unmounting them, but also inhibits running
 *	newfs while the system is secured.
 *
 * In normal operation, the system runs in level 0 mode while single user
 * and in level 1 mode while multiuser. If level 2 mode is desired while
 * running multiuser, it can be set in the multiuser startup script
 * (/etc/rc.local) using sysctl(1). If it is desired to run the system
 * in level 0 mode while multiuser, initialize the variable securelevel
 * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
 * zero as that would allow the vmunix binary to be patched to -1.
 * Without initialization, securelevel loads in the BSS area which only
 * comes into existence when the kernel is loaded and hence cannot be
 * patched by a stalking hacker.
 */

#ifndef _SYS_SYSTM_H_
#define	_SYS_SYSTM_H_

#include <sys/cdefs.h>

#include <sys/types.h>
#include <sys/time.h>
#include <sys/tty.h>
#include <sys/vm.h>
#include <sys/proc.h>
#include <sys/linker_set.h>
__BEGIN_DECLS
#include <kern/thread.h>
__END_DECLS

#define KERNEL_FUNNEL 1
#define NETWORK_FUNNEL 2

extern int securelevel;		/* system security level */
extern const char *panicstr;	/* panic message */
extern char version[];		/* system version */
extern char copyright[];	/* system copyright */

extern int nblkdev;		/* number of entries in bdevsw */
extern int nchrdev;		/* number of entries in cdevsw */

extern dev_t rootdev;		/* root device */
extern struct vnode *rootvp;	/* vnode equivalent to above */

extern struct sysent {		/* system call table */
	int16_t		sy_narg;	/* number of args */
	int8_t		sy_parallel;/* can execute in parallel */
        int8_t		sy_funnel;	/* funnel type */
	int32_t		(*sy_call)();	/* implementing function */
} sysent[];
extern int nsysent;

extern int	boothowto;	/* reboot flags, from console subsystem */
extern int	show_space;

extern funnel_t * kernel_flock;
extern funnel_t * network_flock;

#define SYSINIT(a,b,c,d,e)
#define MALLOC_DEFINE(a,b,c)


#define getenv_int(a,b) (*b = 0)
#define	KASSERT(exp,msg)

/*
 * General function declarations.
 */
__BEGIN_DECLS
int	nullop __P((void));
int	enodev ();		/* avoid actual prototype for multiple use */
void	enodev_strat();
int	nulldev();
int	enoioctl __P((void));
int	enxio __P((void));
int	eopnotsupp __P((void));
int	einval __P((void));
int	seltrue __P((dev_t dev, int which, struct proc *p));
void	*hashinit __P((int count, int type, u_long *hashmask));
int	nosys __P((struct proc *, void *, register_t *));

#ifdef __GNUC__
volatile void	panic __P((const char *, ...));
#else
void	panic __P((const char *, ...));
#endif
void	tablefull __P((const char *));
void	log __P((int, const char *, ...));
void	kprintf __P((const char *, ...));
void	ttyprintf __P((struct tty *, const char *, ...));

int	kvprintf __P((char const *, void (*)(int, void*), void *, int,
		      _BSD_VA_LIST_));

int	snprintf __P((char *, size_t, const char *, ...));
int	sprintf __P((char *buf, const char *, ...));
void	uprintf __P((const char *, ...));
void	vprintf __P((const char *, _BSD_VA_LIST_));
int	vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_));
int     vsprintf __P((char *buf, const char *, _BSD_VA_LIST_));


void	bcopy __P((const void *from, void *to, size_t len));
void	ovbcopy __P((const void *from, void *to, size_t len));
void	bzero __P((void *buf, size_t len));

int	copystr __P((void *kfaddr, void *kdaddr, size_t len, size_t *done));
int	copyinstr __P((void *udaddr, void *kaddr, size_t len, size_t *done));
int	copyoutstr __P((void *kaddr, void *udaddr, size_t len, size_t *done));
int	copyin __P((void *udaddr, void *kaddr, size_t len));
int	copyout __P((void *kaddr, void *udaddr, size_t len));
int	copywithin __P((void *saddr, void *daddr, size_t len));

int	fubyte __P((void *base));
#ifdef notdef
int	fuibyte __P((void *base));
#endif
int	subyte __P((void *base, int byte));
int	suibyte __P((void *base, int byte));
long	fuword __P((void *base));
long	fuiword __P((void *base));
int	suword __P((void *base, long word));
int	suiword __P((void *base, long word));

int	hzto __P((struct timeval *tv));
typedef void (*timeout_fcn_t)(void *);
void	timeout __P((void (*)(void *), void *arg, int ticks));
void	untimeout __P((void (*)(void *), void *arg));
void	realitexpire __P((void *));

void	bsd_hardclock __P((boolean_t usermode, caddr_t pc, int numticks));
void	gatherstats __P((boolean_t usermode, caddr_t pc));

void	initclocks __P((void));

void	startprofclock __P((struct proc *));
void	stopprofclock __P((struct proc *));
void	setstatclockrate __P((int hzrate));
void	set_fsblocksize __P((struct vnode *));

void addlog __P((const char *, ...));
void printf __P((const char *, ...));

extern boolean_t    thread_funnel_switch(int oldfnl, int newfnl);

#include <libkern/libkern.h>

#ifdef DDB
/* debugger entry points */
int	Debugger __P((void));	/* in DDB only */
#endif

__END_DECLS

#endif /* !_SYS_SYSTM_H_ */