vmparam.h revision 210627
198121Sgshapiro/* $OpenBSD: vmparam.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */ 264562Sgshapiro/* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $ */ 364562Sgshapiro 464562Sgshapiro/* 564562Sgshapiro * Copyright (c) 1988 University of Utah. 664562Sgshapiro * Copyright (c) 1992, 1993 764562Sgshapiro * The Regents of the University of California. All rights reserved. 864562Sgshapiro * 964562Sgshapiro * This code is derived from software contributed to Berkeley by 1064562Sgshapiro * the Systems Programming Group of the University of Utah Computer 1164562Sgshapiro * Science Department and Ralph Campbell. 1264562Sgshapiro * 1364562Sgshapiro * Redistribution and use in source and binary forms, with or without 1464562Sgshapiro * modification, are permitted provided that the following conditions 1564562Sgshapiro * are met: 1664562Sgshapiro * 1. Redistributions of source code must retain the above copyright 1764562Sgshapiro * 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 210627 2010-07-29 20:02:56Z jchandra $ 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/* 56 * Virtual memory related constants, all in bytes 57 */ 58#ifndef MAXTSIZ 59#define MAXTSIZ (128UL*1024*1024) /* max text size */ 60#endif 61#ifndef DFLDSIZ 62#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 63#endif 64#ifndef MAXDSIZ 65#define MAXDSIZ (1*1024UL*1024*1024) /* max data size */ 66#endif 67#ifndef DFLSSIZ 68#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ 69#endif 70#ifndef MAXSSIZ 71#define MAXSSIZ (64UL*1024*1024) /* max stack size */ 72#endif 73#ifndef SGROWSIZ 74#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 75#endif 76 77/* 78 * The time for a process to be blocked before being very swappable. 79 * This is a number of seconds which the system takes as being a non-trivial 80 * amount of real time. You probably shouldn't change this; 81 * it is used in subtle ways (fractions and multiples of it are, that is, like 82 * half of a ``long time'', almost a long time, etc.) 83 * It is related to human patience and other factors which don't really 84 * change over time. 85 */ 86#define MAXSLP 20 87 88/* 89 * Mach derived constants 90 */ 91 92/* user/kernel map constants */ 93#define VM_MIN_ADDRESS ((vm_offset_t)0x00000000) 94#define VM_MAX_ADDRESS ((vm_offset_t)(intptr_t)(int32_t)0xffffffff) 95 96#define VM_MINUSER_ADDRESS ((vm_offset_t)0x00000000) 97#define VM_MAX_MMAP_ADDR VM_MAXUSER_ADDRESS 98 99#if defined(__mips_n64) 100#define VM_MAXUSER_ADDRESS (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG)) 101#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xc000000000000000) 102#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG)) 103#else 104#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000) 105#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000) 106#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000) 107#endif 108 109#define KERNBASE ((vm_offset_t)(intptr_t)(int32_t)0x80000000) 110/* 111 * USRSTACK needs to start a little below 0x8000000 because the R8000 112 * and some QED CPUs perform some virtual address checks before the 113 * offset is calculated. 114 */ 115#define USRSTACK (VM_MAXUSER_ADDRESS - PAGE_SIZE) 116 117/* 118 * Only one memory domain. 119 */ 120#ifndef VM_NDOMAIN 121#define VM_NDOMAIN 1 122#endif 123 124/* 125 * Disable superpage reservations. (not sure if this is right 126 * I copied it from ARM) 127 */ 128#ifndef VM_NRESERVLEVEL 129#define VM_NRESERVLEVEL 0 130#endif 131 132/* virtual sizes (bytes) for various kernel submaps */ 133#ifndef VM_KMEM_SIZE 134#define VM_KMEM_SIZE (12 * 1024 * 1024) 135#endif 136 137/* 138 * How many physical pages per KVA page allocated. 139 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 140 * is the total KVA space allocated for kmem_map. 141 */ 142#ifndef VM_KMEM_SIZE_SCALE 143#define VM_KMEM_SIZE_SCALE (3) 144#endif 145 146/* 147 * Ceiling on amount of kmem_map kva space. 148 */ 149#ifndef VM_KMEM_SIZE_MAX 150#define VM_KMEM_SIZE_MAX (200 * 1024 * 1024) 151#endif 152 153/* initial pagein size of beginning of executable file */ 154#ifndef VM_INITIAL_PAGEIN 155#define VM_INITIAL_PAGEIN 16 156#endif 157 158/* 159 * max number of non-contig chunks of physical RAM you can have 160 */ 161#define VM_PHYSSEG_MAX 32 162 163/* 164 * The physical address space is sparsely populated. 165 */ 166#define VM_PHYSSEG_SPARSE 167 168/* 169 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 170 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 171 * the pool from which physical pages for small UMA objects are 172 * allocated. 173 */ 174#define VM_NFREEPOOL 3 175#define VM_FREEPOOL_CACHE 2 176#define VM_FREEPOOL_DEFAULT 0 177#define VM_FREEPOOL_DIRECT 1 178 179/* 180 * we support 2 free lists: 181 * 182 * - DEFAULT for direct mapped (KSEG0) pages. 183 * Note: This usage of DEFAULT may be misleading because we use 184 * DEFAULT for allocating direct mapped pages. The normal page 185 * allocations use HIGHMEM if available, and then DEFAULT. 186 * - HIGHMEM for other pages 187 */ 188#ifdef __mips_n64 189#define VM_NFREELIST 1 190#define VM_FREELIST_DEFAULT 0 191#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 192#else 193#define VM_NFREELIST 2 194#define VM_FREELIST_DEFAULT 1 195#define VM_FREELIST_HIGHMEM 0 196#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 197#define VM_HIGHMEM_ADDRESS ((vm_paddr_t)0x20000000) 198#endif 199 200/* 201 * The largest allocation size is 1MB. 202 */ 203#define VM_NFREEORDER 9 204 205#endif /* !_MACHINE_VMPARAM_H_ */ 206