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 three free page pools: VM_FREEPOOL_DEFAULT is the default pool 86 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 87 * the pool from which physical pages for small UMA objects are 88 * allocated. 89 */ 90 #define VM_NFREEPOOL 3 91 #define VM_FREEPOOL_CACHE 2 92 #define VM_FREEPOOL_DEFAULT 0 93 #define VM_FREEPOOL_DIRECT 1 94 95 /* 96 * we support 2 free lists: 97 * 98 * - DEFAULT for all systems 99 * - ISADMA for the ISA DMA range on Sharks only 100 */ 101 102 #define VM_NFREELIST 2 103 #define VM_FREELIST_DEFAULT 0 104 #define VM_FREELIST_ISADMA 1 105 106 /* 107 * The largest allocation size is 1MB. 108 */ 109 #define VM_NFREEORDER 9 110 111 /* 112 * Disable superpage reservations. 113 */ 114 #ifndef VM_NRESERVLEVEL 115 #define VM_NRESERVLEVEL 0 116 #endif 117 118 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0) 119 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0) 120 121 #define VM_MIN_ADDRESS (0x00001000) 122 #ifdef ARM_USE_SMALL_ALLOC 123 /* 124 * ARM_KERN_DIRECTMAP is used to make sure there's enough space between 125 * VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory. 126 * It has to be a compile-time constant, even if arm_init_smallalloc(), 127 * which will do the mapping, gets the real amount of memory at runtime, 128 * because VM_MAXUSER_ADDRESS is a constant. 129 */ 130 #ifndef ARM_KERN_DIRECTMAP 131 #define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */ 132 #endif 133 #define VM_MAXUSER_ADDRESS KERNBASE - ARM_KERN_DIRECTMAP 134 #else /* ARM_USE_SMALL_ALLOC */ 135 #ifndef VM_MAXUSER_ADDRESS 136 #define VM_MAXUSER_ADDRESS KERNBASE 137 #endif /* VM_MAXUSER_ADDRESS */ 138 #endif /* ARM_USE_SMALL_ALLOC */ 139 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 140 141 #define USRSTACK VM_MAXUSER_ADDRESS 142 143 /* initial pagein size of beginning of executable file */ 144 #ifndef VM_INITIAL_PAGEIN 145 #define VM_INITIAL_PAGEIN 16 146 #endif 147 148 #ifndef VM_MIN_KERNEL_ADDRESS 149 #define VM_MIN_KERNEL_ADDRESS KERNBASE 150 #endif 151 152 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address) 153 154 /* 155 * Virtual size (bytes) for various kernel submaps. 156 */ 157 #ifndef VM_KMEM_SIZE 158 #define VM_KMEM_SIZE (12*1024*1024) 159 #endif 160 #ifndef VM_KMEM_SIZE_SCALE 161 #define VM_KMEM_SIZE_SCALE (3) 162 #endif 163 164 /* 165 * Ceiling on the size of the kmem submap: 40% of the kernel map. 166 */ 167 #ifndef VM_KMEM_SIZE_MAX 168 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 169 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 170 #endif 171 172 #ifdef ARM_USE_SMALL_ALLOC 173 #define UMA_MD_SMALL_ALLOC 174 #endif /* ARM_USE_SMALL_ALLOC */ 175 176 extern vm_offset_t vm_max_kernel_address; 177 178 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 179 180 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 181 #define VM_MAX_AUTOTUNE_MAXUSERS 384 182 #endif 183 184 #endif /* _MACHINE_VMPARAM_H_ */ 185