vmparam.h revision 178172
1/* $OpenBSD: vmparam.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */ 2/* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $ */ 3 4/* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah Hdr: vmparam.h 1.16 91/01/18 38 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 39 * JNPR: vmparam.h,v 1.3.2.1 2007/09/10 06:01:28 girish 40 * $FreeBSD: head/sys/mips/include/vmparam.h 178172 2008-04-13 07:27:37Z imp $ 41 */ 42 43#ifndef _MACHINE_VMPARAM_H_ 44#define _MACHINE_VMPARAM_H_ 45 46/* 47 * Machine dependent constants mips processors. 48 */ 49/* 50 * USRTEXT is the start of the user text/data space, while USRSTACK 51 * is the top (end) of the user stack. 52 */ 53#define USRTEXT (1*PAGE_SIZE) 54/* 55 * USRSTACK needs to start a little below 0x8000000 because the R8000 56 * and some QED CPUs perform some virtual address checks before the 57 * offset is calculated. 58 */ 59#define USRSTACK 0x7ffff000 /* Start of user stack */ 60 61/* 62 * Virtual memory related constants, all in bytes 63 */ 64#ifndef MAXTSIZ 65#define MAXTSIZ (128UL*1024*1024) /* max text size */ 66#endif 67#ifndef DFLDSIZ 68#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 69#endif 70#ifndef MAXDSIZ 71#define MAXDSIZ (1*1024UL*1024*1024) /* max data size */ 72#endif 73#ifndef DFLSSIZ 74#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ 75#endif 76#ifndef MAXSSIZ 77#define MAXSSIZ (64UL*1024*1024) /* max stack size */ 78#endif 79#ifndef SGROWSIZ 80#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 81#endif 82 83/* 84 * The time for a process to be blocked before being very swappable. 85 * This is a number of seconds which the system takes as being a non-trivial 86 * amount of real time. You probably shouldn't change this; 87 * it is used in subtle ways (fractions and multiples of it are, that is, like 88 * half of a ``long time'', almost a long time, etc.) 89 * It is related to human patience and other factors which don't really 90 * change over time. 91 */ 92#define MAXSLP 20 93 94/* 95 * Mach derived constants 96 */ 97 98/* user/kernel map constants */ 99#define VM_MIN_ADDRESS ((vm_offset_t)0x00000000) 100#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000) 101#define VM_MAX_MMAP_ADDR VM_MAXUSER_ADDRESS 102#define VM_MAX_ADDRESS ((vm_offset_t)0x80000000) 103 104#ifndef VM_KERNEL_ALLOC_OFFSET 105#define VM_KERNEL_ALLOC_OFFSET ((vm_offset_t)0x00000000) 106#endif 107 108#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000) 109#define VM_KERNEL_WIRED_ADDR_END (VM_MIN_KERNEL_ADDRESS + VM_KERNEL_ALLOC_OFFSET) 110#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000) 111 112/* 113 * Disable superpage reservations. (not sure if this is right 114 * I copied it from ARM) 115 */ 116#ifndef VM_NRESERVLEVEL 117#define VM_NRESERVLEVEL 0 118#endif 119 120 121/* virtual sizes (bytes) for various kernel submaps */ 122#ifndef VM_KMEM_SIZE 123#define VM_KMEM_SIZE (12 * 1024 * 1024) 124#endif 125 126/* 127 * How many physical pages per KVA page allocated. 128 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 129 * is the total KVA space allocated for kmem_map. 130 */ 131#ifndef VM_KMEM_SIZE_SCALE 132#define VM_KMEM_SIZE_SCALE (3) 133#endif 134 135/* 136 * Ceiling on amount of kmem_map kva space. 137 */ 138#ifndef VM_KMEM_SIZE_MAX 139#define VM_KMEM_SIZE_MAX (200 * 1024 * 1024) 140#endif 141 142/* initial pagein size of beginning of executable file */ 143#ifndef VM_INITIAL_PAGEIN 144#define VM_INITIAL_PAGEIN 16 145#endif 146 147/* 148 * max number of non-contig chunks of physical RAM you can have 149 */ 150#define VM_PHYSSEG_MAX 32 151 152/* 153 * The physical address space is densely populated. 154 */ 155#define VM_PHYSSEG_DENSE 156 157/* 158 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 159 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 160 * the pool from which physical pages for small UMA objects are 161 * allocated. 162 */ 163#define VM_NFREEPOOL 3 164#define VM_FREEPOOL_CACHE 2 165#define VM_FREEPOOL_DEFAULT 0 166#define VM_FREEPOOL_DIRECT 1 167 168/* 169 * we support 1 free list: 170 * 171 * - DEFAULT for all systems 172 */ 173 174#define VM_NFREELIST 1 175#define VM_FREELIST_DEFAULT 0 176 177/* 178 * The largest allocation size is 1MB. 179 */ 180#define VM_NFREEORDER 9 181 182/* 183 * XXXMIPS: This values need to be changed!!! 184 */ 185#if 0 186#define VM_MIN_ADDRESS ((vm_offset_t)0x0000000000010000) 187#define VM_MAXUSER_ADDRESS ((vm_offset_t)MIPS_KSEG0_START-1) 188#define VM_MAX_ADDRESS ((vm_offset_t)0x0000000100000000) 189#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)MIPS_KSEG3_START) 190#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)MIPS_KSEG3_END) 191#define KERNBASE (VM_MIN_KERNEL_ADDRESS) 192 193/* virtual sizes (bytes) for various kernel submaps */ 194#define VM_KMEM_SIZE (16*1024*1024) /* XXX ??? */ 195#endif 196 197#define NBSEG 0x400000 /* bytes/segment */ 198#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 199#define SEGSHIFT 22 /* LOG2(NBSEG) */ 200 201#endif /* !_MACHINE_VMPARAM_H_ */ 202