/*      $OpenBSD: param.c,v 1.53 2025/08/06 14:00:33 mvs Exp $  */
/*      $NetBSD: param.c,v 1.16 1996/03/12 03:08:40 mrg Exp $   */

/*
 * Copyright (c) 1980, 1986, 1989 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. 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/kernel.h>
#include <sys/utsname.h>
#ifdef SYSVSHM
#include <machine/vmparam.h>
#include <sys/shm.h>
#endif
#ifdef SYSVSEM
#include <sys/sem.h>
#endif

/*
 * Locks used to protect data:
 *      a       atomic
 */

/*
 * 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 -DMAXUSERS=xx
 */

int     hz = HZ;
int     tick = 1000000 / HZ;
int     tick_nsec = 1000000000 / HZ;
int     utc_offset = 0;
#define NPROCESS (30 + 16 * MAXUSERS)
#define NTEXT (80 + NPROCESS / 8)               /* actually the object cache */
#define NVNODE (NPROCESS * 2 + NTEXT + 100)
int     initialvnodes = NVNODE;
int     maxprocess = NPROCESS;                          /* [a] */
int     maxthread = 2 * NPROCESS;                       /* [a] */
int     maxfiles = 5 * (NPROCESS + MAXUSERS) + 80;      /* [a] */
long    nmbclust = NMBCLUSTERS;                         /* [a] */

#ifndef BUFCACHEPERCENT
#define BUFCACHEPERCENT 20
#endif
int     bufcachepercent = BUFCACHEPERCENT;

#ifndef  BUFPAGES
#define BUFPAGES        0
#endif
long     bufpages = BUFPAGES;

int     fscale = FSCALE;        /* kernel uses `FSCALE', user uses `fscale' */

/*
 * Values in support of System V compatible shared memory.      XXX
 */
#ifdef SYSVSHM
#define SHMMAX  SHMMAXPGS       /* shminit() performs a `*= PAGE_SIZE' */
#define SHMMIN  1
#define SHMMNI  128             /* <64k, see IPCID_TO_IX in ipc.h */
#define SHMSEG  128
#define SHMALL  (SHMMAXPGS)

struct  shminfo shminfo = {
        SHMMAX,
        SHMMIN,
        SHMMNI,
        SHMSEG,
        SHMALL
};
#endif

/*
 * Values in support of System V compatible semaphores.
 */
#ifdef SYSVSEM
struct  seminfo seminfo = {
        SEMMNI,         /* # of semaphore identifiers */
        SEMMNS,         /* # of semaphores in system */
        SEMMNU,         /* # of undo structures in system */
        SEMMSL,         /* max # of semaphores per id */
        SEMOPM,         /* max # of operations per semop call */
        SEMUME,         /* max # of undo entries per process */
        SEMUSZ,         /* size in bytes of undo structure */
        SEMVMX,         /* semaphore maximum value */
        SEMAEM          /* adjust on exit max value */
};
#endif

/*
 * This has to be allocated somewhere; allocating
 * them here forces loader errors if this file is omitted
 * (if they've been externed everywhere else; hah!).
 */
struct  utsname utsname;