BSD 4_4_Lite2 release

[unix-history] / usr / src / sys / conf / param.c

/*
* Copyright (c) 1980, 1986, 1989, 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.
*
*      @(#)param.c     8.3 (Berkeley) 8/20/94
*/

#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 <sys/kernel.h>

#include <ufs/ufs/quota.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 HZ
#define HZ 100
#endif
int     hz = HZ;
int     tick = 1000000 / HZ;
int     tickadj = 30000 / (60 * HZ);            /* can adjust 30ms 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)
int     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;