vmparam.h revision 210460
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 210460 2010-07-25 04:19:05Z 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_MAX_ADDRESS ((vm_offset_t)(intptr_t)(int32_t)0xffffffff) 101 102#define VM_MINUSER_ADDRESS ((vm_offset_t)0x00000000) 103#define VM_MAX_MMAP_ADDR VM_MAXUSER_ADDRESS 104 105#if defined(__mips_n64) 106#define VM_MAXUSER_ADDRESS (VM_MINUSER_ADDRESS + (NPDEPG * NPTEPG * PAGE_SIZE)) 107#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xc000000000000000) 108#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NPTEPG * PAGE_SIZE)) 109#else 110#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000) 111#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000) 112#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000) 113#endif 114#if 0 115#define KERNBASE (VM_MIN_KERNEL_ADDRESS) 116#else 117#define KERNBASE ((vm_offset_t)(intptr_t)(int32_t)0x80000000) 118#endif 119 120/* 121 * Disable superpage reservations. (not sure if this is right 122 * I copied it from ARM) 123 */ 124#ifndef VM_NRESERVLEVEL 125#define VM_NRESERVLEVEL 0 126#endif 127 128/* virtual sizes (bytes) for various kernel submaps */ 129#ifndef VM_KMEM_SIZE 130#define VM_KMEM_SIZE (12 * 1024 * 1024) 131#endif 132 133/* 134 * How many physical pages per KVA page allocated. 135 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 136 * is the total KVA space allocated for kmem_map. 137 */ 138#ifndef VM_KMEM_SIZE_SCALE 139#define VM_KMEM_SIZE_SCALE (3) 140#endif 141 142/* 143 * Ceiling on amount of kmem_map kva space. 144 */ 145#ifndef VM_KMEM_SIZE_MAX 146#define VM_KMEM_SIZE_MAX (200 * 1024 * 1024) 147#endif 148 149/* initial pagein size of beginning of executable file */ 150#ifndef VM_INITIAL_PAGEIN 151#define VM_INITIAL_PAGEIN 16 152#endif 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#define SEGSHIFT 22 /* LOG2(NBSEG) */ 202#define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 203#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 204 205#endif /* !_MACHINE_VMPARAM_H_ */ 206