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 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 (4UL*1024*1024) /* initial stack size limit */ 55 #endif 56 #ifndef MAXSSIZ 57 #define MAXSSIZ (64UL*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 * The virtual address the kernel is linked to run at. For armv4/5 platforms 77 * the low-order 30 bits of this must match the low-order bits of the physical 78 * address the kernel is loaded at, so the value is most often provided as a 79 * kernel config option in the std.platform file. For armv6/7 the kernel can 80 * be loaded at any 2MB boundary, and KERNVIRTADDR can also be set to any 2MB 81 * boundary. It is typically overridden in the std.platform file only when 82 * KERNBASE is also set to a lower address to provide more KVA. 83 */ 84 #ifndef KERNVIRTADDR 85 #define KERNVIRTADDR 0xc0000000 86 #endif 87 88 /* 89 * max number of non-contig chunks of physical RAM you can have 90 */ 91 92 #define VM_PHYSSEG_MAX 32 93 94 /* 95 * The physical address space may be sparsely populated on some ARM systems. 96 */ 97 #define VM_PHYSSEG_SPARSE 98 99 /* 100 * Create one free page pool. Since the ARM kernel virtual address 101 * space does not include a mapping onto the machine's entire physical 102 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default 103 * pool, VM_FREEPOOL_DEFAULT. 104 */ 105 #define VM_NFREEPOOL 1 106 #define VM_FREEPOOL_DEFAULT 0 107 #define VM_FREEPOOL_DIRECT 0 108 109 /* 110 * We need just one free list: DEFAULT. 111 */ 112 #define VM_NFREELIST 1 113 #define VM_FREELIST_DEFAULT 0 114 115 /* 116 * The largest allocation size is 1MB. 117 */ 118 #define VM_NFREEORDER 9 119 120 /* 121 * Enable superpage reservations: 1 level. 122 */ 123 #ifndef VM_NRESERVLEVEL 124 #define VM_NRESERVLEVEL 1 125 #endif 126 127 /* 128 * Level 0 reservations consist of 256 pages. 129 */ 130 #ifndef VM_LEVEL_0_ORDER 131 #define VM_LEVEL_0_ORDER 8 132 #endif 133 134 #define VM_MIN_ADDRESS (0x00001000) 135 #ifndef VM_MAXUSER_ADDRESS 136 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */ 137 #endif 138 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 139 140 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 141 #define USRSTACK SHAREDPAGE 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 * How many physical pages per kmem arena virtual page. 156 */ 157 #ifndef VM_KMEM_SIZE_SCALE 158 #define VM_KMEM_SIZE_SCALE (3) 159 #endif 160 161 /* 162 * Optional floor (in bytes) on the size of the kmem arena. 163 */ 164 #ifndef VM_KMEM_SIZE_MIN 165 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 166 #endif 167 168 /* 169 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 170 * kernel map. 171 */ 172 #ifndef VM_KMEM_SIZE_MAX 173 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 174 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 175 #endif 176 177 extern vm_offset_t vm_max_kernel_address; 178 179 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 180 181 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 182 #define VM_MAX_AUTOTUNE_MAXUSERS 384 183 #endif 184 185 #define SFBUF 186 #define SFBUF_MAP 187 188 #define PMAP_HAS_DMAP 0 189 #define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; }) 190 #define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; }) 191 192 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH 193 194 /* 195 * No non-transparent large page support in the pmap. 196 */ 197 #define PMAP_HAS_LARGEPAGES 0 198 199 /* 200 * Need a page dump array for minidump. 201 */ 202 #define MINIDUMP_PAGE_TRACKING 1 203 #define MINIDUMP_STARTUP_PAGE_TRACKING 0 204 205 #endif /* _MACHINE_VMPARAM_H_ */ 206