systm.h revision 3304
1/*- 2 * Copyright (c) 1982, 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)systm.h 8.4 (Berkeley) 2/23/94 39 * $Id: systm.h,v 1.11 1994/09/18 21:30:30 bde Exp $ 40 */ 41 42#ifndef _SYS_SYSTM_H_ 43#define _SYS_SYSTM_H_ 44 45#include <machine/cpufunc.h> 46 47/* 48 * The `securelevel' variable controls the security level of the system. 49 * It can only be decreased by process 1 (/sbin/init). 50 * 51 * Security levels are as follows: 52 * -1 permannently insecure mode - always run system in level 0 mode. 53 * 0 insecure mode - immutable and append-only flags make be turned off. 54 * All devices may be read or written subject to permission modes. 55 * 1 secure mode - immutable and append-only flags may not be changed; 56 * raw disks of mounted filesystems, /dev/mem, and /dev/kmem are 57 * read-only. 58 * 2 highly secure mode - same as (1) plus raw disks are always 59 * read-only whether mounted or not. This level precludes tampering 60 * with filesystems by unmounting them, but also inhibits running 61 * newfs while the system is secured. 62 * 63 * In normal operation, the system runs in level 0 mode while single user 64 * and in level 1 mode while multiuser. If level 2 mode is desired while 65 * running multiuser, it can be set in the multiuser startup script 66 * (/etc/rc.local) using sysctl(1). If it is desired to run the system 67 * in level 0 mode while multiuser, initialize the variable securelevel 68 * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to 69 * zero as that would allow the kernel binary to be patched to -1. 70 * Without initialization, securelevel loads in the BSS area which only 71 * comes into existence when the kernel is loaded and hence cannot be 72 * patched by a stalking hacker. 73 */ 74extern int securelevel; /* system security level */ 75extern const char *panicstr; /* panic message */ 76extern char version[]; /* system version */ 77extern char copyright[]; /* system copyright */ 78 79extern int nblkdev; /* number of entries in bdevsw */ 80extern int nchrdev; /* number of entries in cdevsw */ 81extern int nswdev; /* number of swap devices */ 82extern int nswap; /* size of swap space */ 83 84extern int selwait; /* select timeout address */ 85 86extern u_char curpriority; /* priority of current process */ 87 88extern int maxmem; /* max memory per process */ 89extern int physmem; /* physical memory */ 90 91extern dev_t dumpdev; /* dump device */ 92extern long dumplo; /* offset into dumpdev */ 93 94extern dev_t rootdev; /* root device */ 95extern struct vnode *rootvp; /* vnode equivalent to above */ 96 97extern dev_t swapdev; /* swapping device */ 98extern struct vnode *swapdev_vp;/* vnode equivalent to above */ 99 100extern int boothowto; /* reboot flags, from console subsystem */ 101 102/* 103 * General function declarations. 104 */ 105int nullop __P((void)); 106int enodev __P((void)); 107int enoioctl __P((void)); 108int enxio __P((void)); 109int eopnotsupp __P((void)); 110int seltrue __P((dev_t dev, int which, struct proc *p)); 111int ureadc __P((int, struct uio *)); 112void *hashinit __P((int count, int type, u_long *hashmask)); 113 114__dead void panic __P((const char *, ...)) __dead2; 115__dead void boot __P((int)) __dead2; 116void tablefull __P((const char *)); 117void addlog __P((const char *, ...)); 118void log __P((int, const char *, ...)); 119void printf __P((const char *, ...)); 120void uprintf __P((const char *, ...)); 121int sprintf __P((char *buf, const char *, ...)); 122void ttyprintf __P((struct tty *, const char *, ...)); 123 124void bcopy __P((const void *from, void *to, u_int len)); 125void ovbcopy __P((const void *from, void *to, u_int len)); 126void blkclr __P((void *buf, u_int len)); 127void bzero __P((void *buf, u_int len)); 128 129int copystr __P((void *kfaddr, void *kdaddr, u_int len, u_int *done)); 130int copyinstr __P((void *udaddr, void *kaddr, u_int len, u_int *done)); 131int copyoutstr __P((void *kaddr, void *udaddr, u_int len, u_int *done)); 132int copyin __P((void *udaddr, void *kaddr, u_int len)); 133int copyout __P((void *kaddr, void *udaddr, u_int len)); 134 135int fubyte __P((void *base)); 136int fuibyte __P((void *base)); 137int subyte __P((void *base, int byte)); 138int suibyte __P((void *base, int byte)); 139int fuword __P((void *base)); 140int fuiword __P((void *base)); 141int suword __P((void *base, int word)); 142int suiword __P((void *base, int word)); 143 144int hzto __P((struct timeval *tv)); 145void realitexpire __P((void *)); 146 147struct clockframe; 148void hardclock __P((struct clockframe *frame)); 149void softclock __P((void)); 150void statclock __P((struct clockframe *frame)); 151 152void initclocks __P((void)); 153 154void startprofclock __P((struct proc *)); 155void stopprofclock __P((struct proc *)); 156void setstatclockrate __P((int hzrate)); 157 158#include <libkern/libkern.h> 159 160/* Initialize the world */ 161extern void consinit(void); 162extern void kmeminit(void); 163extern void cpu_startup(void); 164extern void usrinfoinit(void); 165extern void rqinit(void); 166extern void vfsinit(void); 167extern void mbinit(void); 168extern void clist_init(void); 169extern void ifinit(void); 170extern void domaininit(void); 171extern void cpu_initclocks(void); 172extern void vntblinit(void); 173extern void nchinit(void); 174 175extern __dead void vm_pageout(void) __dead2; /* pagedaemon, called in proc 2 */ 176extern __dead void vfs_update(void) __dead2; /* update, called in proc 3 */ 177extern __dead void scheduler(void) __dead2; /* sched, called in process 0 */ 178 179/* Timeouts */ 180typedef void (timeout_t)(void *); /* actual timeout function type */ 181typedef timeout_t *timeout_func_t; /* a pointer to this type */ 182 183void timeout(timeout_func_t, void *, int); 184void untimeout(timeout_func_t, void *); 185 186#endif /* !_SYS_SYSTM_H_ */ 187