sys/kern/param.c

   1 /* $Id: param.c,v 1.1.1.1 2006/09/14 01:59:08 root Exp $ */
   2 /*
   3  * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by the University of
  17  *      California, Berkeley and its contributors.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)param.c     7.20 (Berkeley) 6/27/91
  35  */
  36
  37 #include "sys/param.h"
  38 #include "sys/systm.h"
  39 #include "sys/callout.h"
  40 #include "sys/filedesc.h"
  41 #include "sys/mbuf.h"
  42
  43 /*
  44  * System parameter formulae.
  45  *
  46  * This file is copied into each directory where we compile
  47  * the kernel; it should be modified there to suit local taste
  48  * if necessary.
  49  *
  50  * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x
  51  */
  52
  53 #ifndef HZ
  54 #define HZ 100
  55 #endif
  56
  57 int     hz;
  58 int     tick;
  59
  60 #ifndef TIMEZONE
  61 #define TIMEZONE 0
  62 #endif
  63 #ifndef DST
  64 #define DST 0
  65 #endif
  66 struct  timezone tz;
  67
  68 #ifndef NPROC
  69 #define NPROC   3
  70 #endif
  71
  72 int     ncallout;
  73 int     nmbclusters;
  74 int     maxfiles;
  75
  76 /*
  77  * These have to be allocated somewhere; allocating
  78  * them here forces loader errors if this file is omitted
  79  * (if they've been externed everywhere else; hah!).
  80  */
  81 struct  callout *callout;
  82
  83
  84 void
  85 paraminit ()
  86 {
  87     hz = HZ;
  88     tick = 1000000 / HZ;
  89
  90     tz.tz_minuteswest = TIMEZONE;
  91     tz.tz_dsttime = DST;
  92
  93     ncallout = 16 + NPROC;
  94     nmbclusters = NMBCLUSTERS;
  95     maxfiles = NDFILE * NPROC;
  96 }