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+/*
+ * 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
+ * $Id: param.c,v 1.31 1998/11/05 14:28:17 dg Exp $
+ */
+
+#include <stddef.h>
+
+#include "opt_sysvipc.h"
+#include "opt_param.h"
+
+#include <sys/param.h>
+
+#ifdef SYSVSHM
+#include <machine/vmparam.h>
+#include <sys/shm.h>
+#endif
+#ifdef SYSVSEM
+#include <sys/sem.h>
+#endif
+#ifdef SYSVMSG
+#include <sys/msg.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 -DMAXUSERS=xx
+ */
+
+#ifndef HZ
+#define HZ 100
+#endif
+int hz = HZ;
+int tick = 1000000 / HZ;
+int tickadj = howmany(30000, 60 * HZ); /* can adjust 30ms in 60s */
+#define NPROC (20 + 16 * MAXUSERS)
+#define MAXFILES (NPROC*2)
+int maxproc = NPROC; /* maximum # of processes */
+int maxprocperuid = NPROC-1; /* maximum # of processes per user */
+int maxfiles = MAXFILES; /* system wide open files limit */
+int maxfilesperproc = MAXFILES; /* per-process open files limit */
+int ncallout = 16 + NPROC + MAXFILES; /* maximum # of timer events */
+
+/* maximum # of mbuf clusters */
+#ifndef NMBCLUSTERS
+#define NMBCLUSTERS (512 + MAXUSERS * 16)
+#endif
+int nmbclusters = NMBCLUSTERS;
+
+#if MAXFILES > NMBCLUSTERS
+#define MAXSOCKETS MAXFILES
+#else
+#define MAXSOCKETS NMBCLUSTERS
+#endif
+int maxsockets = MAXSOCKETS;
+
+/* allocate 1/4th amount of virtual address space for mbufs XXX */
+int nmbufs = NMBCLUSTERS * 4;
+
+/* maximum # of sf_bufs (sendfile(2) zero-copy virtual buffers) */
+#ifndef NSFBUFS
+#define NSFBUFS (512 + MAXUSERS * 16)
+#endif
+int nsfbufs = NSFBUFS;
+
+/*
+ * Values in support of System V compatible shared memory. XXX
+ */
+#ifdef SYSVSHM
+#ifndef SHMMAX
+#define SHMMAX (SHMMAXPGS*PAGE_SIZE)
+#endif
+#ifndef SHMMIN
+#define SHMMIN 1
+#endif
+#ifndef SHMMNI
+#define SHMMNI 32 /* <= SHMMMNI in shm.h */
+#endif
+#ifndef SHMSEG
+#define SHMSEG 8
+#endif
+#ifndef SHMALL
+#define SHMALL (SHMMAXPGS)
+#endif
+
+struct shminfo shminfo = {
+ SHMMAX,
+ SHMMIN,
+ SHMMNI,
+ SHMSEG,
+ SHMALL
+};
+#endif
+
+/*
+ * Values in support of System V compatible semaphores.
+ */
+
+#ifdef SYSVSEM
+
+struct seminfo seminfo = {
+ SEMMAP, /* # of entries in semaphore map */
+ 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
+
+/*
+ * Values in support of System V compatible messages.
+ */
+
+#ifdef SYSVMSG
+
+struct msginfo msginfo = {
+ MSGMAX, /* max chars in a message */
+ MSGMNI, /* # of message queue identifiers */
+ MSGMNB, /* max chars in a queue */
+ MSGTQL, /* max messages in system */
+ MSGSSZ, /* size of a message segment */
+ /* (must be small power of 2 greater than 4) */
+ MSGSEG /* number of message segments */
+};
+#endif
+
+/*
+ * These may be set to nonzero here or by patching.
+ * If they are nonzero at bootstrap time then they are
+ * initialized to values dependent on the memory size.
+ */
+#ifdef NBUF
+int nbuf = NBUF;
+#else
+int nbuf = 0;
+#endif
+int nswbuf = 0;
+
+/*
+ * 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 buf *swbuf;
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