1 /* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1988 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef _MACHINE_VMPARAM_H_ 35 #define _MACHINE_VMPARAM_H_ 36 37 /* 38 * Machine dependent constants for ARM. 39 */ 40 41 /* 42 * Virtual memory related constants, all in bytes 43 */ 44 #ifndef MAXTSIZ 45 #define MAXTSIZ (64UL*1024*1024) /* max text size */ 46 #endif 47 #ifndef DFLDSIZ 48 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 49 #endif 50 #ifndef MAXDSIZ 51 #define MAXDSIZ (512UL*1024*1024) /* max data size */ 52 #endif 53 #ifndef DFLSSIZ 54 #define DFLSSIZ (2UL*1024*1024) /* initial stack size limit */ 55 #endif 56 #ifndef MAXSSIZ 57 #define MAXSSIZ (8UL*1024*1024) /* max stack size */ 58 #endif 59 #ifndef SGROWSIZ 60 #define SGROWSIZ (128UL*1024) /* amount to grow stack */ 61 #endif 62 63 /* 64 * Address space constants 65 */ 66 67 /* 68 * The line between user space and kernel space 69 * Mappings >= KERNEL_BASE are constant across all processes 70 */ 71 #define KERNBASE 0xc0000000 72 73 /* 74 * max number of non-contig chunks of physical RAM you can have 75 */ 76 77 #define VM_PHYSSEG_MAX 32 78 79 /* 80 * The physical address space is densely populated. 81 */ 82 #define VM_PHYSSEG_DENSE 83 84 /* 85 * Create two or three free page pools depending on the existence of a direct 86 * map: VM_FREEPOOL_DEFAULT is the default pool from which physical pages are 87 * allocated, and VM_FREEPOOL_DIRECT is the pool from which physical pages for 88 * small UMA objects are allocated. 89 */ 90 #ifdef ARM_USE_SMALL_ALLOC 91 #define VM_NFREEPOOL 3 92 #define VM_FREEPOOL_CACHE 2 93 #define VM_FREEPOOL_DIRECT 1 94 #else 95 #define VM_NFREEPOOL 2 96 #define VM_FREEPOOL_CACHE 1 97 #define VM_FREEPOOL_DIRECT 0 98 #endif 99 #define VM_FREEPOOL_DEFAULT 0 100 101 /* 102 * we support 2 free lists: 103 * 104 * - DEFAULT for all systems 105 * - ISADMA for the ISA DMA range on Sharks only 106 */ 107 108 #define VM_NFREELIST 2 109 #define VM_FREELIST_DEFAULT 0 110 #define VM_FREELIST_ISADMA 1 111 112 /* 113 * The largest allocation size is 1MB. 114 */ 115 #define VM_NFREEORDER 9 116 117 /* 118 * Enable superpage reservations: 1 level. 119 */ 120 #ifndef VM_NRESERVLEVEL 121 #define VM_NRESERVLEVEL 1 122 #endif 123 124 /* 125 * Level 0 reservations consist of 256 pages. 126 */ 127 #ifndef VM_LEVEL_0_ORDER 128 #define VM_LEVEL_0_ORDER 8 129 #endif 130 131 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0) 132 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0) 133 134 #define VM_MIN_ADDRESS (0x00001000) 135 #ifdef ARM_USE_SMALL_ALLOC 136 /* 137 * ARM_KERN_DIRECTMAP is used to make sure there's enough space between 138 * VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory. 139 * It has to be a compile-time constant, even if arm_init_smallalloc(), 140 * which will do the mapping, gets the real amount of memory at runtime, 141 * because VM_MAXUSER_ADDRESS is a constant. 142 */ 143 #ifndef ARM_KERN_DIRECTMAP 144 #define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */ 145 #endif 146 #define VM_MAXUSER_ADDRESS KERNBASE - ARM_KERN_DIRECTMAP 147 #else /* ARM_USE_SMALL_ALLOC */ 148 #ifndef VM_MAXUSER_ADDRESS 149 #define VM_MAXUSER_ADDRESS KERNBASE 150 #endif /* VM_MAXUSER_ADDRESS */ 151 #endif /* ARM_USE_SMALL_ALLOC */ 152 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 153 154 #define USRSTACK VM_MAXUSER_ADDRESS 155 156 /* initial pagein size of beginning of executable file */ 157 #ifndef VM_INITIAL_PAGEIN 158 #define VM_INITIAL_PAGEIN 16 159 #endif 160 161 #ifndef VM_MIN_KERNEL_ADDRESS 162 #define VM_MIN_KERNEL_ADDRESS KERNBASE 163 #endif 164 165 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address) 166 167 /* 168 * How many physical pages per kmem arena virtual page. 169 */ 170 #ifndef VM_KMEM_SIZE_SCALE 171 #define VM_KMEM_SIZE_SCALE (3) 172 #endif 173 174 /* 175 * Optional floor (in bytes) on the size of the kmem arena. 176 */ 177 #ifndef VM_KMEM_SIZE_MIN 178 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 179 #endif 180 181 /* 182 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 183 * kernel map. 184 */ 185 #ifndef VM_KMEM_SIZE_MAX 186 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 187 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 188 #endif 189 190 #ifdef ARM_USE_SMALL_ALLOC 191 #define UMA_MD_SMALL_ALLOC 192 #endif /* ARM_USE_SMALL_ALLOC */ 193 194 extern vm_offset_t vm_max_kernel_address; 195 196 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 197 198 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 199 #define VM_MAX_AUTOTUNE_MAXUSERS 384 200 #endif 201 202 #endif /* _MACHINE_VMPARAM_H_ */ 203