1 /* $NetBSD: vmparam3.h,v 1.32 2003/08/07 16:29:56 agc 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 /* 131 * PTEs for system V style shared memory. 132 * This is basically slop for kmempt which we actually allocate (malloc) from. 133 */ 134 #ifndef SHMMAXPGS 135 #define SHMMAXPGS 512 /* 4 MB */ 136 #endif 137 138 #define PAGER_MAP_SIZE (4 * 1024 * 1024) 139