systm.h revision 2865
11541Srgrimes/*- 21541Srgrimes * Copyright (c) 1982, 1988, 1991, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * (c) UNIX System Laboratories, Inc. 51541Srgrimes * All or some portions of this file are derived from material licensed 61541Srgrimes * to the University of California by American Telephone and Telegraph 71541Srgrimes * Co. or Unix System Laboratories, Inc. and are reproduced herein with 81541Srgrimes * the permission of UNIX System Laboratories, Inc. 91541Srgrimes * 101541Srgrimes * Redistribution and use in source and binary forms, with or without 111541Srgrimes * modification, are permitted provided that the following conditions 121541Srgrimes * are met: 131541Srgrimes * 1. Redistributions of source code must retain the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer. 151541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161541Srgrimes * notice, this list of conditions and the following disclaimer in the 171541Srgrimes * documentation and/or other materials provided with the distribution. 181541Srgrimes * 3. All advertising materials mentioning features or use of this software 191541Srgrimes * must display the following acknowledgement: 201541Srgrimes * This product includes software developed by the University of 211541Srgrimes * California, Berkeley and its contributors. 221541Srgrimes * 4. Neither the name of the University nor the names of its contributors 231541Srgrimes * may be used to endorse or promote products derived from this software 241541Srgrimes * without specific prior written permission. 251541Srgrimes * 261541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 271541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 281541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 291541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 301541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 311541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 321541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 331541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 341541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 351541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 361541Srgrimes * SUCH DAMAGE. 371541Srgrimes * 381541Srgrimes * @(#)systm.h 8.4 (Berkeley) 2/23/94 392865Sbde * $Id: systm.h,v 1.10 1994/09/15 20:24:27 bde Exp $ 401541Srgrimes */ 411541Srgrimes 422165Spaul#ifndef _SYS_SYSTM_H_ 432865Sbde#define _SYS_SYSTM_H_ 442165Spaul 451549Srgrimes#include <machine/cpufunc.h> 461549Srgrimes 471541Srgrimes/* 481541Srgrimes * The `securelevel' variable controls the security level of the system. 491541Srgrimes * It can only be decreased by process 1 (/sbin/init). 501541Srgrimes * 511541Srgrimes * Security levels are as follows: 521541Srgrimes * -1 permannently insecure mode - always run system in level 0 mode. 531541Srgrimes * 0 insecure mode - immutable and append-only flags make be turned off. 541541Srgrimes * All devices may be read or written subject to permission modes. 551541Srgrimes * 1 secure mode - immutable and append-only flags may not be changed; 561541Srgrimes * raw disks of mounted filesystems, /dev/mem, and /dev/kmem are 571541Srgrimes * read-only. 581541Srgrimes * 2 highly secure mode - same as (1) plus raw disks are always 591541Srgrimes * read-only whether mounted or not. This level precludes tampering 601541Srgrimes * with filesystems by unmounting them, but also inhibits running 611541Srgrimes * newfs while the system is secured. 621541Srgrimes * 631541Srgrimes * In normal operation, the system runs in level 0 mode while single user 641541Srgrimes * and in level 1 mode while multiuser. If level 2 mode is desired while 651541Srgrimes * running multiuser, it can be set in the multiuser startup script 661541Srgrimes * (/etc/rc.local) using sysctl(1). If it is desired to run the system 671541Srgrimes * in level 0 mode while multiuser, initialize the variable securelevel 681541Srgrimes * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to 691858Sdg * zero as that would allow the kernel binary to be patched to -1. 701541Srgrimes * Without initialization, securelevel loads in the BSS area which only 711541Srgrimes * comes into existence when the kernel is loaded and hence cannot be 721541Srgrimes * patched by a stalking hacker. 731541Srgrimes */ 741541Srgrimesextern int securelevel; /* system security level */ 751541Srgrimesextern const char *panicstr; /* panic message */ 761541Srgrimesextern char version[]; /* system version */ 771541Srgrimesextern char copyright[]; /* system copyright */ 781541Srgrimes 791541Srgrimesextern int nblkdev; /* number of entries in bdevsw */ 801541Srgrimesextern int nchrdev; /* number of entries in cdevsw */ 811541Srgrimesextern int nswdev; /* number of swap devices */ 821541Srgrimesextern int nswap; /* size of swap space */ 831541Srgrimes 841541Srgrimesextern int selwait; /* select timeout address */ 851541Srgrimes 861541Srgrimesextern u_char curpriority; /* priority of current process */ 871541Srgrimes 881541Srgrimesextern int maxmem; /* max memory per process */ 891541Srgrimesextern int physmem; /* physical memory */ 901541Srgrimes 911541Srgrimesextern dev_t dumpdev; /* dump device */ 921541Srgrimesextern long dumplo; /* offset into dumpdev */ 931541Srgrimes 941541Srgrimesextern dev_t rootdev; /* root device */ 951541Srgrimesextern struct vnode *rootvp; /* vnode equivalent to above */ 961541Srgrimes 971541Srgrimesextern dev_t swapdev; /* swapping device */ 981541Srgrimesextern struct vnode *swapdev_vp;/* vnode equivalent to above */ 991541Srgrimes 1001541Srgrimesextern int boothowto; /* reboot flags, from console subsystem */ 1011541Srgrimes 1021541Srgrimes/* 1031541Srgrimes * General function declarations. 1041541Srgrimes */ 1051541Srgrimesint nullop __P((void)); 1061541Srgrimesint enodev __P((void)); 1071541Srgrimesint enoioctl __P((void)); 1081541Srgrimesint enxio __P((void)); 1091541Srgrimesint eopnotsupp __P((void)); 1101541Srgrimesint seltrue __P((dev_t dev, int which, struct proc *p)); 1111541Srgrimesvoid *hashinit __P((int count, int type, u_long *hashmask)); 1121541Srgrimes 1132059Sdg__dead void panic __P((const char *, ...)) __dead2; 1142059Sdg__dead void boot __P((int)) __dead2; 1151541Srgrimesvoid tablefull __P((const char *)); 1161541Srgrimesvoid addlog __P((const char *, ...)); 1171541Srgrimesvoid log __P((int, const char *, ...)); 1181541Srgrimesvoid printf __P((const char *, ...)); 1192112Swollmanvoid uprintf __P((const char *, ...)); 1201541Srgrimesint sprintf __P((char *buf, const char *, ...)); 1211541Srgrimesvoid ttyprintf __P((struct tty *, const char *, ...)); 1221541Srgrimes 1231541Srgrimesvoid bcopy __P((const void *from, void *to, u_int len)); 1241541Srgrimesvoid ovbcopy __P((const void *from, void *to, u_int len)); 1252811Sbdevoid blkclr __P((void *buf, u_int len)); 1261541Srgrimesvoid bzero __P((void *buf, u_int len)); 1271541Srgrimes 1281541Srgrimesint copystr __P((void *kfaddr, void *kdaddr, u_int len, u_int *done)); 1291541Srgrimesint copyinstr __P((void *udaddr, void *kaddr, u_int len, u_int *done)); 1301541Srgrimesint copyoutstr __P((void *kaddr, void *udaddr, u_int len, u_int *done)); 1311541Srgrimesint copyin __P((void *udaddr, void *kaddr, u_int len)); 1321541Srgrimesint copyout __P((void *kaddr, void *udaddr, u_int len)); 1331541Srgrimes 1341541Srgrimesint fubyte __P((void *base)); 1351541Srgrimesint fuibyte __P((void *base)); 1361541Srgrimesint subyte __P((void *base, int byte)); 1371541Srgrimesint suibyte __P((void *base, int byte)); 1381541Srgrimesint fuword __P((void *base)); 1391541Srgrimesint fuiword __P((void *base)); 1401541Srgrimesint suword __P((void *base, int word)); 1411541Srgrimesint suiword __P((void *base, int word)); 1421541Srgrimes 1431541Srgrimesint hzto __P((struct timeval *tv)); 1441541Srgrimesvoid realitexpire __P((void *)); 1451541Srgrimes 1461541Srgrimesstruct clockframe; 1471541Srgrimesvoid hardclock __P((struct clockframe *frame)); 1481541Srgrimesvoid softclock __P((void)); 1491541Srgrimesvoid statclock __P((struct clockframe *frame)); 1501541Srgrimes 1511541Srgrimesvoid initclocks __P((void)); 1521541Srgrimes 1531541Srgrimesvoid startprofclock __P((struct proc *)); 1541541Srgrimesvoid stopprofclock __P((struct proc *)); 1551541Srgrimesvoid setstatclockrate __P((int hzrate)); 1561541Srgrimes 1571541Srgrimes#include <libkern/libkern.h> 1582112Swollman 1592112Swollman/* Initialize the world */ 1602112Swollmanextern void consinit(void); 1612112Swollmanextern void kmeminit(void); 1622112Swollmanextern void cpu_startup(void); 1632112Swollmanextern void usrinfoinit(void); 1642112Swollmanextern void rqinit(void); 1652112Swollmanextern void vfsinit(void); 1662112Swollmanextern void mbinit(void); 1672112Swollmanextern void clist_init(void); 1682112Swollmanextern void ifinit(void); 1692112Swollmanextern void domaininit(void); 1702112Swollmanextern void cpu_initclocks(void); 1712112Swollmanextern void vntblinit(void); 1722112Swollmanextern void nchinit(void); 1732112Swollman 1742112Swollmanextern __dead void vm_pageout(void) __dead2; /* pagedaemon, called in proc 2 */ 1752112Swollmanextern __dead void vfs_update(void) __dead2; /* update, called in proc 3 */ 1762112Swollmanextern __dead void scheduler(void) __dead2; /* sched, called in process 0 */ 1772112Swollman 1782112Swollman/* Timeouts */ 1792112Swollmantypedef void (timeout_t)(void *); /* actual timeout function type */ 1802112Swollmantypedef timeout_t *timeout_func_t; /* a pointer to this type */ 1812112Swollman 1822112Swollmanvoid timeout(timeout_func_t, void *, int); 1832112Swollmanvoid untimeout(timeout_func_t, void *); 1842165Spaul 1852865Sbde#endif /* !_SYS_SYSTM_H_ */ 186