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- /*
- * Mach Operating System
- * Copyright (c) 1992 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
- /*
- * HISTORY
- * $Log: param.c,v $
- * Revision 2.1 92/04/21 17:11:40 rwd
- * BSDSS
- *
- *
- */
-
- /*
- * Copyright (c) 1980, 1986, 1989 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.
- *
- * @(#)param.c 7.20 (Berkeley) 6/27/91
- */
-
- #include <sys/param.h>
- #include <sys/systm.h>
- #include <sys/socket.h>
- #include <sys/proc.h>
- #include <sys/vnode.h>
- #include <sys/file.h>
- #include <sys/callout.h>
- #include <sys/clist.h>
- #include <sys/mbuf.h>
- #include <ufs/quota.h>
- #include <sys/kernel.h>
- #ifdef SYSVSHM
- #include <machine/vmparam.h>
- #include <sys/shm.h>
- #endif
-
- /*
- * System parameter formulae.
- *
- * This file is copied into each directory where we compile
- * the kernel; it should be modified there to suit local taste
- * if necessary.
- *
- * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx
- */
-
- #ifndef TIMEZONE
- #define TIMEZONE 300
- #endif
- #ifndef MAXUSERS
- #define MAXUSERS 16
- #endif
- #ifndef DST
- #define DST 1
- #endif
- #ifndef MAXDSIZE
- #define MAXDSIZ 0x2000000
- #endif
- #ifndef HZ
- #define HZ 1000
- #endif
- int hz = HZ;
- int tick = 1000000 / HZ;
- int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
- struct timezone tz = { TIMEZONE, DST };
- #define NPROC (20 + 16 * MAXUSERS)
- int maxproc = NPROC;
- #define NTEXT (80 + NPROC / 8) /* actually the object cache */
- #define NVNODE (NPROC + NTEXT + 100)
- long desiredvnodes = NVNODE;
- int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
- int ncallout = 16 + NPROC;
- int nclist = 60 + 12 * MAXUSERS;
- int nmbclusters = NMBCLUSTERS;
- int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
-
- /*
- * Values in support of System V compatible shared memory. XXX
- */
- #ifdef SYSVSHM
- #define SHMMAX (SHMMAXPGS*NBPG)
- #define SHMMIN 1
- #define SHMMNI 32 /* <= SHMMMNI in shm.h */
- #define SHMSEG 8
- #define SHMALL (SHMMAXPGS/CLSIZE)
-
- struct shminfo shminfo = {
- SHMMAX,
- SHMMIN,
- SHMMNI,
- SHMSEG,
- SHMALL
- };
- #endif
-
- /*
- * These are initialized at bootstrap time
- * to values dependent on memory size
- */
- int nbuf, nswbuf;
-
- /*
- * These have to be allocated somewhere; allocating
- * them here forces loader errors if this file is omitted
- * (if they've been externed everywhere else; hah!).
- */
- struct callout *callout;
- struct cblock *cfree;
- struct buf *buf, *swbuf;
- char *buffers;
-
- /*
- * Proc/pgrp hashing.
- * Here so that hash table sizes can depend on MAXUSERS/NPROC.
- * Hash size must be a power of two.
- * NOW omission of this file will cause loader errors!
- */
-
- #if NPROC > 1024
- #define PIDHSZ 512
- #else
- #if NPROC > 512
- #define PIDHSZ 256
- #else
- #if NPROC > 256
- #define PIDHSZ 128
- #else
- #define PIDHSZ 64
- #endif
- #endif
- #endif
-
- struct proc *pidhash[PIDHSZ];
- struct pgrp *pgrphash[PIDHSZ];
- int pidhashmask = PIDHSZ - 1;
-