1 /* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 1988 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD$ 34 */ 35 36 #ifndef _MACHINE_VMPARAM_H_ 37 #define _MACHINE_VMPARAM_H_ 38 39 /* 40 * Machine dependent constants for ARM. 41 */ 42 43 /* 44 * Virtual memory related constants, all in bytes 45 */ 46 #ifndef MAXTSIZ 47 #define MAXTSIZ (256UL*1024*1024) /* max text size */ 48 #endif 49 #ifndef DFLDSIZ 50 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 51 #endif 52 #ifndef MAXDSIZ 53 #define MAXDSIZ (512UL*1024*1024) /* max data size */ 54 #endif 55 #ifndef DFLSSIZ 56 #define DFLSSIZ (2UL*1024*1024) /* initial stack size limit */ 57 #endif 58 #ifndef MAXSSIZ 59 #define MAXSSIZ (8UL*1024*1024) /* max stack size */ 60 #endif 61 #ifndef SGROWSIZ 62 #define SGROWSIZ (128UL*1024) /* amount to grow stack */ 63 #endif 64 65 /* 66 * Address space constants 67 */ 68 69 /* 70 * The line between user space and kernel space 71 * Mappings >= KERNEL_BASE are constant across all processes 72 */ 73 #ifndef KERNBASE 74 #define KERNBASE 0xc0000000 75 #endif 76 77 /* 78 * max number of non-contig chunks of physical RAM you can have 79 */ 80 81 #define VM_PHYSSEG_MAX 32 82 83 /* 84 * The physical address space may be sparsely populated on some ARM systems. 85 */ 86 #define VM_PHYSSEG_SPARSE 87 88 /* 89 * Create one free page pool. Since the ARM kernel virtual address 90 * space does not include a mapping onto the machine's entire physical 91 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default 92 * pool, VM_FREEPOOL_DEFAULT. 93 */ 94 #define VM_NFREEPOOL 1 95 #define VM_FREEPOOL_DEFAULT 0 96 #define VM_FREEPOOL_DIRECT 0 97 98 /* 99 * We need just one free list: DEFAULT. 100 */ 101 #define VM_NFREELIST 1 102 #define VM_FREELIST_DEFAULT 0 103 104 /* 105 * The largest allocation size is 1MB. 106 */ 107 #define VM_NFREEORDER 9 108 109 /* 110 * Enable superpage reservations: 1 level. 111 */ 112 #ifndef VM_NRESERVLEVEL 113 #define VM_NRESERVLEVEL 1 114 #endif 115 116 /* 117 * Level 0 reservations consist of 256 pages. 118 */ 119 #ifndef VM_LEVEL_0_ORDER 120 #define VM_LEVEL_0_ORDER 8 121 #endif 122 123 #define VM_MIN_ADDRESS (0x00001000) 124 #ifndef VM_MAXUSER_ADDRESS 125 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */ 126 #endif 127 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 128 129 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 130 #define USRSTACK SHAREDPAGE 131 132 /* initial pagein size of beginning of executable file */ 133 #ifndef VM_INITIAL_PAGEIN 134 #define VM_INITIAL_PAGEIN 16 135 #endif 136 137 #ifndef VM_MIN_KERNEL_ADDRESS 138 #define VM_MIN_KERNEL_ADDRESS KERNBASE 139 #endif 140 141 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address) 142 143 /* 144 * How many physical pages per kmem arena virtual page. 145 */ 146 #ifndef VM_KMEM_SIZE_SCALE 147 #define VM_KMEM_SIZE_SCALE (3) 148 #endif 149 150 /* 151 * Optional floor (in bytes) on the size of the kmem arena. 152 */ 153 #ifndef VM_KMEM_SIZE_MIN 154 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 155 #endif 156 157 /* 158 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 159 * kernel map. 160 */ 161 #ifndef VM_KMEM_SIZE_MAX 162 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 163 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 164 #endif 165 166 extern vm_offset_t vm_max_kernel_address; 167 168 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 169 170 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 171 #define VM_MAX_AUTOTUNE_MAXUSERS 384 172 #endif 173 174 #define SFBUF 175 #define SFBUF_MAP 176 177 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH 178 179 #endif /* _MACHINE_VMPARAM_H_ */ 180