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 #ifdef __mips_n64 100 #define FREEBSD32_USRSTACK (((vm_offset_t)0x80000000) - PAGE_SIZE) 101 #endif 102 103 /* 104 * Disable superpage reservations. (not sure if this is right 105 * I copied it from ARM) 106 */ 107 #ifndef VM_NRESERVLEVEL 108 #define VM_NRESERVLEVEL 0 109 #endif 110 111 /* virtual sizes (bytes) for various kernel submaps */ 112 #ifndef VM_KMEM_SIZE 113 #define VM_KMEM_SIZE (12 * 1024 * 1024) 114 #endif 115 116 /* 117 * How many physical pages per KVA page allocated. 118 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX) 119 * is the total KVA space allocated for kmem_map. 120 */ 121 #ifndef VM_KMEM_SIZE_SCALE 122 #define VM_KMEM_SIZE_SCALE (3) 123 #endif 124 125 /* 126 * Ceiling on the amount of kmem_map KVA space: 40% of the entire KVA space. 127 */ 128 #ifndef VM_KMEM_SIZE_MAX 129 #define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \ 130 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 131 #endif 132 133 /* initial pagein size of beginning of executable file */ 134 #ifndef VM_INITIAL_PAGEIN 135 #define VM_INITIAL_PAGEIN 16 136 #endif 137 138 #define UMA_MD_SMALL_ALLOC 139 140 /* 141 * max number of non-contig chunks of physical RAM you can have 142 */ 143 #define VM_PHYSSEG_MAX 32 144 145 /* 146 * The physical address space is sparsely populated. 147 */ 148 #define VM_PHYSSEG_SPARSE 149 150 /* 151 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 152 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 153 * the pool from which physical pages for small UMA objects are 154 * allocated. 155 */ 156 #define VM_NFREEPOOL 3 157 #define VM_FREEPOOL_CACHE 2 158 #define VM_FREEPOOL_DEFAULT 0 159 #define VM_FREEPOOL_DIRECT 1 160 161 /* 162 * we support 2 free lists: 163 * 164 * - DEFAULT for direct mapped (KSEG0) pages. 165 * Note: This usage of DEFAULT may be misleading because we use 166 * DEFAULT for allocating direct mapped pages. The normal page 167 * allocations use HIGHMEM if available, and then DEFAULT. 168 * - HIGHMEM for other pages 169 */ 170 #ifdef __mips_n64 171 #define VM_NFREELIST 1 172 #define VM_FREELIST_DEFAULT 0 173 #define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 174 #else 175 #define VM_NFREELIST 2 176 #define VM_FREELIST_DEFAULT 1 177 #define VM_FREELIST_HIGHMEM 0 178 #define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT 179 #define VM_HIGHMEM_ADDRESS ((vm_paddr_t)0x20000000) 180 #endif 181 182 /* 183 * The largest allocation size is 1MB. 184 */ 185 #define VM_NFREEORDER 9 186 187 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 188 189 #endif /* !_MACHINE_VMPARAM_H_ */ 190