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 * $FreeBSD$ 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 * Mach derived constants 74 */ 75 76/* user/kernel map constants */ 77#define VM_MIN_ADDRESS ((vm_offset_t)0x00000000) 78#define VM_MAX_ADDRESS ((vm_offset_t)(intptr_t)(int32_t)0xffffffff) 79 80#define VM_MINUSER_ADDRESS ((vm_offset_t)0x00000000) 81 82#ifdef __mips_n64 83#define VM_MAXUSER_ADDRESS (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG)) 84#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xc000000000000000) 85#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG)) 86#else 87#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000) 88#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000) 89#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000) 90#endif 91 92#define KERNBASE ((vm_offset_t)(intptr_t)(int32_t)0x80000000) 93/* 94 * USRSTACK needs to start a little below 0x8000000 because the R8000 95 * and some QED CPUs perform some virtual address checks before the 96 * offset is calculated. 97 */ 98#define USRSTACK (VM_MAXUSER_ADDRESS - PAGE_SIZE) 99 100/* 101 * Only one memory domain. 102 */ 103#ifndef VM_NDOMAIN 104#define VM_NDOMAIN 1 105#endif 106 107/* 108 * Disable superpage reservations. (not sure if this is right 109 * I copied it from ARM) 110 */ 111#ifndef VM_NRESERVLEVEL 112#define VM_NRESERVLEVEL 0 113#endif 114 115/* virtual sizes (bytes) for various kernel submaps */ 116#ifndef VM_KMEM_SIZE 117#define VM_KMEM_SIZE (12 * 1024 * 1024) 118#endif 119 120/* 121 * How many physical pages per KVA page allocated. 122 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 123 * is the total KVA space allocated for kmem_map. 124 */ 125#ifndef VM_KMEM_SIZE_SCALE 126#define VM_KMEM_SIZE_SCALE (3) 127#endif 128 129/* 130 * Ceiling on amount of kmem_map kva space. 131 */ 132#ifndef VM_KMEM_SIZE_MAX 133#define VM_KMEM_SIZE_MAX (200 * 1024 * 1024) 134#endif 135 136/* initial pagein size of beginning of executable file */ 137#ifndef VM_INITIAL_PAGEIN 138#define VM_INITIAL_PAGEIN 16 139#endif 140 141#define UMA_MD_SMALL_ALLOC 142 143/* 144 * max number of non-contig chunks of physical RAM you can have 145 */ 146#define VM_PHYSSEG_MAX 32 147 148/* 149 * The physical address space is sparsely populated. 150 */ 151#define VM_PHYSSEG_SPARSE 152 153/* 154 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 155 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 156 * the pool from which physical pages for small UMA objects are 157 * allocated. 158 */ 159#define VM_NFREEPOOL 3 160#define VM_FREEPOOL_CACHE 2 161#define VM_FREEPOOL_DEFAULT 0 162#define VM_FREEPOOL_DIRECT 1 163 164/* 165 * we support 2 free lists: 166 * 167 * - DEFAULT for direct mapped (KSEG0) pages. 168 * Note: This usage of DEFAULT may be misleading because we use 169 * DEFAULT for allocating direct mapped pages. The normal page 170 * allocations use HIGHMEM if available, and then DEFAULT. 171 * - HIGHMEM for other pages 172 */ 173#ifdef __mips_n64 174#define VM_NFREELIST 1 175#define VM_FREELIST_DEFAULT 0 176#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 177#else 178#define VM_NFREELIST 2 179#define VM_FREELIST_DEFAULT 1 180#define VM_FREELIST_HIGHMEM 0 181#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 182#define VM_HIGHMEM_ADDRESS ((vm_paddr_t)0x20000000) 183#endif 184 185/* 186 * The largest allocation size is 1MB. 187 */ 188#define VM_NFREEORDER 9 189 190#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 191 192#endif /* !_MACHINE_VMPARAM_H_ */ 193