sys/arch/sun3/include/vmparam3.h

   1 /*      $NetBSD: vmparam3.h,v 1.34 2007/10/25 13:03:05 yamt Exp $       */
   2
   3 /*
   4  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  36  *      from: @(#)vmparam.h     7.3 (Berkeley) 5/7/91
  37  *      vmparam.h,v 1.2 1993/05/22 07:58:38 cgd Exp
  38  */
  39
  40 /*
  41  * Copyright (c) 1994 Gordon W. Ross
  42  * Copyright (c) 1993 Adam Glass
  43  * Copyright (c) 1988 University of Utah.
  44  *
  45  * This code is derived from software contributed to Berkeley by
  46  * the Systems Programming Group of the University of Utah Computer
  47  * Science Department.
  48  *
  49  * Redistribution and use in source and binary forms, with or without
  50  * modification, are permitted provided that the following conditions
  51  * are met:
  52  * 1. Redistributions of source code must retain the above copyright
  53  *    notice, this list of conditions and the following disclaimer.
  54  * 2. Redistributions in binary form must reproduce the above copyright
  55  *    notice, this list of conditions and the following disclaimer in the
  56  *    documentation and/or other materials provided with the distribution.
  57  * 3. All advertising materials mentioning features or use of this software
  58  *    must display the following acknowledgement:
  59  *      This product includes software developed by the University of
  60  *      California, Berkeley and its contributors.
  61  * 4. Neither the name of the University nor the names of its contributors
  62  *    may be used to endorse or promote products derived from this software
  63  *    without specific prior written permission.
  64  *
  65  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  66  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  67  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  68  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  69  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  70  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  71  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  72  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  73  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  74  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  75  * SUCH DAMAGE.
  76  *
  77  *      from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  78  *      from: @(#)vmparam.h     7.3 (Berkeley) 5/7/91
  79  *      vmparam.h,v 1.2 1993/05/22 07:58:38 cgd Exp
  80  */
  81
  82 /*
  83  * Machine dependent constants for Sun3
  84  *
  85  * The Sun3 has limited total kernel virtual space (32MB) and
  86  * can not use main memory for page tables.  (All active PTEs
  87  * must be installed in special translation RAM in the MMU).
  88  * Therefore, parameters that would normally configure the
  89  * size of various page tables are irrelevant.  Only things
  90  * that consume portions of kernel virtual (KV) space matter,
  91  * and those things should be chosen to conserve KV space.
  92  */
  93
  94 /*
  95  * USRSTACK is the top (end) of the user stack.
  96  */
  97 #define USRSTACK        KERNBASE        /* High end of user stack */
  98
  99 /*
 100  * Virtual memory related constants, all in bytes.
 101  * The Sun3 has only 224 MB of user-virtual space,
 102  * so we need to be conservative with these limits.
 103  */
 104 #ifndef MAXTSIZ
 105 #define MAXTSIZ         (8*1024*1024)           /* max text size */
 106 #endif
 107 #ifndef DFLDSIZ
 108 #define DFLDSIZ         (16*1024*1024)          /* initial data size limit */
 109 #endif
 110 #ifndef MAXDSIZ
 111 #define MAXDSIZ         (32*1024*1024)          /* max data size */
 112 #endif
 113 #ifndef DFLSSIZ
 114 #define DFLSSIZ         (512*1024)              /* initial stack size limit */
 115 #endif
 116 #ifndef MAXSSIZ
 117 #define MAXSSIZ         MAXDSIZ                 /* max stack size */
 118 #endif
 119
 120 /*
 121  * PTEs for mapping user space into the kernel for phyio operations.
 122  * The actual limitation for physio requests will be the DVMA space,
 123  * and that is fixed by hardware design at 1MB.  We could make the
 124  * physio map larger than that, but it would not buy us much.
 125  */
 126 #ifndef USRIOSIZE
 127 #define USRIOSIZE       128             /* 1 MB */
 128 #endif
 129
 130 #define PAGER_MAP_DEFAULT_SIZE (4 * 1024 * 1024)