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 (256UL*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 #ifndef KERNBASE 72 #define KERNBASE 0xc0000000 73 #endif 74 75 /* 76 * max number of non-contig chunks of physical RAM you can have 77 */ 78 79 #define VM_PHYSSEG_MAX 32 80 81 /* 82 * The physical address space may be sparsely populated on some ARM systems. 83 */ 84 #define VM_PHYSSEG_SPARSE 85 86 /* 87 * Create one free page pool. Since the ARM kernel virtual address 88 * space does not include a mapping onto the machine's entire physical 89 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default 90 * pool, VM_FREEPOOL_DEFAULT. 91 */ 92 #define VM_NFREEPOOL 1 93 #define VM_FREEPOOL_DEFAULT 0 94 #define VM_FREEPOOL_DIRECT 0 95 96 /* 97 * We need just one free list: DEFAULT. 98 */ 99 #define VM_NFREELIST 1 100 #define VM_FREELIST_DEFAULT 0 101 102 /* 103 * The largest allocation size is 1MB. 104 */ 105 #define VM_NFREEORDER 9 106 107 /* 108 * Enable superpage reservations: 1 level. 109 */ 110 #ifndef VM_NRESERVLEVEL 111 #define VM_NRESERVLEVEL 1 112 #endif 113 114 /* 115 * Level 0 reservations consist of 256 pages. 116 */ 117 #ifndef VM_LEVEL_0_ORDER 118 #define VM_LEVEL_0_ORDER 8 119 #endif 120 121 #define VM_MIN_ADDRESS (0x00001000) 122 #ifndef VM_MAXUSER_ADDRESS 123 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */ 124 #endif 125 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 126 127 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 128 #define USRSTACK SHAREDPAGE 129 130 /* initial pagein size of beginning of executable file */ 131 #ifndef VM_INITIAL_PAGEIN 132 #define VM_INITIAL_PAGEIN 16 133 #endif 134 135 #ifndef VM_MIN_KERNEL_ADDRESS 136 #define VM_MIN_KERNEL_ADDRESS KERNBASE 137 #endif 138 139 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address) 140 141 /* 142 * How many physical pages per kmem arena virtual page. 143 */ 144 #ifndef VM_KMEM_SIZE_SCALE 145 #define VM_KMEM_SIZE_SCALE (3) 146 #endif 147 148 /* 149 * Optional floor (in bytes) on the size of the kmem arena. 150 */ 151 #ifndef VM_KMEM_SIZE_MIN 152 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 153 #endif 154 155 /* 156 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 157 * kernel map. 158 */ 159 #ifndef VM_KMEM_SIZE_MAX 160 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 161 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 162 #endif 163 164 extern vm_offset_t vm_max_kernel_address; 165 166 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 167 168 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 169 #define VM_MAX_AUTOTUNE_MAXUSERS 384 170 #endif 171 172 #define SFBUF 173 #define SFBUF_MAP 174 175 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH 176 177 #endif /* _MACHINE_VMPARAM_H_ */ 178