vmparam.h revision 216315
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 216315 2010-12-09 06:34:28Z jchandra $ 41 */ 42 43#ifndef _MACHINE_VMPARAM_H_ 44#define _MACHINE_VMPARAM_H_ 45 46/* 47 * Machine dependent constants mips processors. 48 */ 49 50/* 51 * Virtual memory related constants, all in bytes 52 */ 53#ifndef MAXTSIZ 54#define MAXTSIZ (128UL*1024*1024) /* max text size */ 55#endif 56#ifndef DFLDSIZ 57#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 58#endif 59#ifndef MAXDSIZ 60#define MAXDSIZ (1*1024UL*1024*1024) /* max data size */ 61#endif 62#ifndef DFLSSIZ 63#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ 64#endif 65#ifndef MAXSSIZ 66#define MAXSSIZ (64UL*1024*1024) /* max stack size */ 67#endif 68#ifndef SGROWSIZ 69#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 70#endif 71 72/* 73 * The time for a process to be blocked before being very swappable. 74 * This is a number of seconds which the system takes as being a non-trivial 75 * amount of real time. You probably shouldn't change this; 76 * it is used in subtle ways (fractions and multiples of it are, that is, like 77 * half of a ``long time'', almost a long time, etc.) 78 * It is related to human patience and other factors which don't really 79 * change over time. 80 */ 81#define MAXSLP 20 82 83/* 84 * Mach derived constants 85 */ 86 87/* user/kernel map constants */ 88#define VM_MIN_ADDRESS ((vm_offset_t)0x00000000) 89#define VM_MAX_ADDRESS ((vm_offset_t)(intptr_t)(int32_t)0xffffffff) 90 91#define VM_MINUSER_ADDRESS ((vm_offset_t)0x00000000) 92 93#ifdef __mips_n64 94#define VM_MAXUSER_ADDRESS (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG)) 95#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xc000000000000000) 96#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG)) 97#else 98#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000) 99#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000) 100#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000) 101#endif 102 103#define KERNBASE ((vm_offset_t)(intptr_t)(int32_t)0x80000000) 104/* 105 * USRSTACK needs to start a little below 0x8000000 because the R8000 106 * and some QED CPUs perform some virtual address checks before the 107 * offset is calculated. 108 */ 109#define USRSTACK (VM_MAXUSER_ADDRESS - PAGE_SIZE) 110 111/* 112 * Only one memory domain. 113 */ 114#ifndef VM_NDOMAIN 115#define VM_NDOMAIN 1 116#endif 117 118/* 119 * Disable superpage reservations. (not sure if this is right 120 * I copied it from ARM) 121 */ 122#ifndef VM_NRESERVLEVEL 123#define VM_NRESERVLEVEL 0 124#endif 125 126/* virtual sizes (bytes) for various kernel submaps */ 127#ifndef VM_KMEM_SIZE 128#define VM_KMEM_SIZE (12 * 1024 * 1024) 129#endif 130 131/* 132 * How many physical pages per KVA page allocated. 133 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 134 * is the total KVA space allocated for kmem_map. 135 */ 136#ifndef VM_KMEM_SIZE_SCALE 137#define VM_KMEM_SIZE_SCALE (3) 138#endif 139 140/* 141 * Ceiling on amount of kmem_map kva space. 142 */ 143#ifndef VM_KMEM_SIZE_MAX 144#define VM_KMEM_SIZE_MAX (200 * 1024 * 1024) 145#endif 146 147/* initial pagein size of beginning of executable file */ 148#ifndef VM_INITIAL_PAGEIN 149#define VM_INITIAL_PAGEIN 16 150#endif 151 152#define UMA_MD_SMALL_ALLOC 153 154/* 155 * max number of non-contig chunks of physical RAM you can have 156 */ 157#define VM_PHYSSEG_MAX 32 158 159/* 160 * The physical address space is sparsely populated. 161 */ 162#define VM_PHYSSEG_SPARSE 163 164/* 165 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 166 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 167 * the pool from which physical pages for small UMA objects are 168 * allocated. 169 */ 170#define VM_NFREEPOOL 3 171#define VM_FREEPOOL_CACHE 2 172#define VM_FREEPOOL_DEFAULT 0 173#define VM_FREEPOOL_DIRECT 1 174 175/* 176 * we support 2 free lists: 177 * 178 * - DEFAULT for direct mapped (KSEG0) pages. 179 * Note: This usage of DEFAULT may be misleading because we use 180 * DEFAULT for allocating direct mapped pages. The normal page 181 * allocations use HIGHMEM if available, and then DEFAULT. 182 * - HIGHMEM for other pages 183 */ 184#ifdef __mips_n64 185#define VM_NFREELIST 1 186#define VM_FREELIST_DEFAULT 0 187#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 188#else 189#define VM_NFREELIST 2 190#define VM_FREELIST_DEFAULT 1 191#define VM_FREELIST_HIGHMEM 0 192#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 193#define VM_HIGHMEM_ADDRESS ((vm_paddr_t)0x20000000) 194#endif 195 196/* 197 * The largest allocation size is 1MB. 198 */ 199#define VM_NFREEORDER 9 200 201#endif /* !_MACHINE_VMPARAM_H_ */ 202