1 /* $NetBSD: vmparam.h,v 1.43 2023/02/07 14:11:16 hgutch 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 4U and 4V UltraSPARC 45 */ 46 47 #ifndef VMPARAM_H 48 #define VMPARAM_H 49 50 #define __USE_TOPDOWN_VM 51 52 /* 53 * We use 8K VM pages on the Sun4U. Override the PAGE_* definitions 54 * to be compile-time constants. 55 */ 56 #define PAGE_SHIFT 13 57 #define PAGE_SIZE (1 << PAGE_SHIFT) 58 #define PAGE_MASK (PAGE_SIZE - 1) 59 60 /* 61 * Default pager_map of 16MB is awfully small. There is plenty 62 * of VA so use it. 63 */ 64 #define PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024) 65 66 /* 67 * Defaults for Unified Buffer Cache parameters. 68 */ 69 70 #ifndef UBC_WINSHIFT 71 #define UBC_WINSHIFT 16 /* 64kB */ 72 #endif 73 #ifndef UBC_NWINS 74 #define UBC_NWINS 4096 /* 256MB */ 75 #endif 76 77 /* 78 * The kernel itself is mapped by the boot loader with 4Mb locked VM pages, 79 * so let's keep 4Mb definitions here as well. 80 */ 81 #define PAGE_SHIFT_4M 22 82 #define PAGE_SIZE_4M (1UL<<PAGE_SHIFT_4M) 83 #define PAGE_MASK_4M (PAGE_SIZE_4M-1) 84 85 /* 86 * USRSTACK is the top (end) of the user stack. 87 */ 88 #define USRSTACK32 0xffffe000L 89 #ifdef __arch64__ 90 #define USRSTACK 0xffffffffffffe000L 91 #else 92 #define USRSTACK USRSTACK32 93 #endif 94 95 /* 96 * Virtual memory related constants, all in bytes 97 */ 98 #if __arch64__ 99 /* 100 * 64-bit limits: 101 * 102 * Since the compiler generates `call' instructions we can't 103 * have more than 4GB in a single text segment. 104 * 105 * And since we only have a 40-bit adderss space, allow half 106 * of that for data and the other half for stack. 107 */ 108 #ifndef MAXTSIZ 109 #define MAXTSIZ (4UL*1024*1024*1024) /* max text size */ 110 #endif 111 #ifndef DFLDSIZ 112 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 113 #endif 114 #ifndef MAXDSIZ 115 #define MAXDSIZ (1UL<<39) /* 512GB max data size */ 116 /* 117 * For processes not using topdown VA, we need to limit the data size - 118 * they probably have not been compiled with the proper compiler memory 119 * model. 120 */ 121 #define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \ 122 round_page((vaddr_t)(da) + (vsize_t)uimax(maxdmap,1UL*1024*1024*1024)) 123 #endif 124 #ifndef DFLSSIZ 125 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 126 #endif 127 #ifndef MAXSSIZ 128 #define MAXSSIZ (128*1024*1024) /* max stack size */ 129 #endif 130 #else 131 /* 132 * 32-bit limits: 133 * 134 * We only have 4GB to play with. Limit data, and text 135 * each to half of that and set a reasonable stack limit. 136 * 137 */ 138 #ifndef MAXTSIZ 139 #define MAXTSIZ (2UL*1024*1024*1024) /* max text size */ 140 #endif 141 #ifndef DFLDSIZ 142 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 143 #endif 144 #ifndef MAXDSIZ 145 #define MAXDSIZ (2UL*1024*1024*1024) /* max data size */ 146 #endif 147 #ifndef DFLSSIZ 148 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 149 #endif 150 #ifndef MAXSSIZ 151 #define MAXSSIZ (64*1024*1024) /* max stack size */ 152 #endif 153 #endif 154 155 /* 156 * 32-bit emulation limits (same as sparc - we could go bigger) 157 */ 158 #ifndef DFLDSIZ32 159 #define DFLDSIZ32 (64*1024*1024) /* initial data size limit */ 160 #endif 161 #ifndef MAXDSIZ32 162 #define MAXDSIZ32 (512*1024*1024) /* max data size */ 163 #endif 164 #ifndef DFLSSIZ32 165 #define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */ 166 #endif 167 #ifndef MAXSSIZ32 168 #define MAXSSIZ32 (32*1024*1024) /* max stack size */ 169 #endif 170 171 /* 172 * Mach derived constants 173 */ 174 175 /* 176 * User/kernel map constants. 177 */ 178 #define VM_MIN_ADDRESS ((vaddr_t)0) 179 #define VM_MAX_ADDRESS (((vaddr_t)(-1))&~PGOFSET) 180 #define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS 181 #define VM_MAXUSER_ADDRESS32 ((vaddr_t)(0x00000000ffffffffL&~PGOFSET)) 182 183 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 184 #ifdef __arch64__ 185 #define VM_KERNEL_MEM_VA_START ((vaddr_t)0x100000000UL) 186 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0x000007ffffffffffUL) 187 #else 188 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND) 189 #endif 190 191 #define VM_PHYSSEG_MAX 32 /* up to 32 segments */ 192 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 193 194 #define VM_NFREELIST 1 195 #define VM_FREELIST_DEFAULT 0 196 197 #endif 198