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 free page pools. Since the ARM kernel virtual address 86 * space does not include a mapping onto the machine's entire physical 87 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default 88 * pool, VM_FREEPOOL_DEFAULT. 89 */ 90 #define VM_NFREEPOOL 2 91 #define VM_FREEPOOL_CACHE 1 92 #define VM_FREEPOOL_DEFAULT 0 93 #define VM_FREEPOOL_DIRECT 0 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 * Enable superpage reservations: 1 level. 113 */ 114 #ifndef VM_NRESERVLEVEL 115 #define VM_NRESERVLEVEL 1 116 #endif 117 118 /* 119 * Level 0 reservations consist of 256 pages. 120 */ 121 #ifndef VM_LEVEL_0_ORDER 122 #define VM_LEVEL_0_ORDER 8 123 #endif 124 125 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0) 126 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0) 127 128 #define VM_MIN_ADDRESS (0x00001000) 129 #ifndef VM_MAXUSER_ADDRESS 130 #define VM_MAXUSER_ADDRESS KERNBASE 131 #endif /* VM_MAXUSER_ADDRESS */ 132 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 133 134 #define USRSTACK VM_MAXUSER_ADDRESS 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 #ifndef VM_MIN_KERNEL_ADDRESS 142 #define VM_MIN_KERNEL_ADDRESS KERNBASE 143 #endif 144 145 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address) 146 147 /* 148 * How many physical pages per kmem arena virtual page. 149 */ 150 #ifndef VM_KMEM_SIZE_SCALE 151 #define VM_KMEM_SIZE_SCALE (3) 152 #endif 153 154 /* 155 * Optional floor (in bytes) on the size of the kmem arena. 156 */ 157 #ifndef VM_KMEM_SIZE_MIN 158 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 159 #endif 160 161 /* 162 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 163 * kernel map. 164 */ 165 #ifndef VM_KMEM_SIZE_MAX 166 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 167 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 168 #endif 169 170 extern vm_offset_t vm_max_kernel_address; 171 172 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 173 174 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 175 #define VM_MAX_AUTOTUNE_MAXUSERS 384 176 #endif 177 178 #endif /* _MACHINE_VMPARAM_H_ */ 179