1 /* $NetBSD: vmparam.h,v 1.32 2010/11/14 13:33:23 uebayasi Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)vmparam.h 8.1 (Berkeley) 6/11/93 41 */ 42 43 /* 44 * Machine dependent constants for Sun-4c SPARC 45 */ 46 47 #ifndef VMPARAM_H 48 #define VMPARAM_H 49 50 /* 51 * We use 8K VM pages on the Sun4U. Override the PAGE_* definitions 52 * to be compile-time constants. 53 */ 54 #define PAGE_SHIFT 13 55 #define PAGE_SIZE (1 << PAGE_SHIFT) 56 #define PAGE_MASK (PAGE_SIZE - 1) 57 58 /* 59 * The kernel itself is mapped by the boot loader with 4Mb locked VM pages, 60 * so let's keep 4Mb definitions here as well. 61 */ 62 #define PAGE_SHIFT_4M 22 63 #define PAGE_SIZE_4M (1UL<<PAGE_SHIFT_4M) 64 #define PAGE_MASK_4M (PAGE_SIZE_4M-1) 65 66 /* 67 * USRSTACK is the top (end) of the user stack. 68 */ 69 #define USRSTACK32 0xffffe000L 70 #ifdef __arch64__ 71 #define USRSTACK 0xffffffffffffe000L 72 #else 73 #define USRSTACK USRSTACK32 74 #endif 75 76 /* 77 * Virtual memory related constants, all in bytes 78 */ 79 /* #ifdef __arch64__ */ 80 #if 0 81 /* 82 * 64-bit limits: 83 * 84 * Since the compiler generates `call' instructions we can't 85 * have more than 4GB in a single text segment. 86 * 87 * And since we only have a 40-bit adderss space, allow half 88 * of that for data and the other half for stack. 89 */ 90 #ifndef MAXTSIZ 91 #define MAXTSIZ (4L*1024*1024*1024) /* max text size */ 92 #endif 93 #ifndef DFLDSIZ 94 #define DFLDSIZ (128L*1024*1024) /* initial data size limit */ 95 #endif 96 #ifndef MAXDSIZ 97 #define MAXDSIZ (1L<<39) /* max data size */ 98 #endif 99 #ifndef DFLSSIZ 100 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 101 #endif 102 #ifndef MAXSSIZ 103 #define MAXSSIZ MAXDSIZ /* max stack size */ 104 #endif 105 #else 106 /* 107 * 32-bit limits: 108 * 109 * We only have 4GB to play with. Limit stack, data, and text 110 * each to half of that. 111 * 112 * This is silly. Apparently if we go above these numbers 113 * integer overflows in other parts of the kernel cause hangs. 114 */ 115 #ifndef MAXTSIZ 116 #define MAXTSIZ (1*1024*1024*1024) /* max text size */ 117 #endif 118 #ifndef DFLDSIZ 119 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 120 #endif 121 #ifndef MAXDSIZ 122 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 123 #endif 124 #ifndef DFLSSIZ 125 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 126 #endif 127 #ifndef MAXSSIZ 128 #define MAXSSIZ (8*1024*1024) /* max stack size */ 129 #endif 130 #endif 131 132 /* 133 * 32-bit emulation limits. 134 */ 135 #ifndef MAXTSIZ32 136 #define MAXTSIZ32 (1*1024*1024*1024) /* max text size */ 137 #endif 138 #ifndef DFLDSIZ32 139 #define DFLDSIZ32 (128*1024*1024) /* initial data size limit */ 140 #endif 141 #ifndef MAXDSIZ32 142 #define MAXDSIZ32 (1*1024*1024*1024) /* max data size */ 143 #endif 144 #ifndef DFLSSIZ32 145 #define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */ 146 #endif 147 #ifndef MAXSSIZ32 148 #define MAXSSIZ32 (8*1024*1024) /* max stack size */ 149 #endif 150 151 /* 152 * Mach derived constants 153 */ 154 155 /* 156 * User/kernel map constants. 157 */ 158 #define VM_MIN_ADDRESS ((vaddr_t)0) 159 #define VM_MAX_ADDRESS ((vaddr_t)-1) 160 #define VM_MAXUSER_ADDRESS ((vaddr_t)-1) 161 #define VM_MAXUSER_ADDRESS32 ((vaddr_t)(0x00000000ffffffffL&~PGOFSET)) 162 163 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 164 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND) 165 166 #define VM_PHYSSEG_MAX 32 /* up to 32 segments */ 167 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 168 169 #define VM_NFREELIST 1 170 #define VM_FREELIST_DEFAULT 0 171 172 #endif 173