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 * The virtual address the kernel is linked to run at. For armv4/5 platforms 79 * the low-order 30 bits of this must match the low-order bits of the physical 80 * address the kernel is loaded at, so the value is most often provided as a 81 * kernel config option in the std.platform file. For armv6/7 the kernel can 82 * be loaded at any 2MB boundary, and KERNVIRTADDR can also be set to any 2MB 83 * boundary. It is typically overridden in the std.platform file only when 84 * KERNBASE is also set to a lower address to provide more KVA. 85 */ 86 #ifndef KERNVIRTADDR 87 #define KERNVIRTADDR 0xc0000000 88 #endif 89 90 /* 91 * max number of non-contig chunks of physical RAM you can have 92 */ 93 94 #define VM_PHYSSEG_MAX 32 95 96 /* 97 * The physical address space may be sparsely populated on some ARM systems. 98 */ 99 #define VM_PHYSSEG_SPARSE 100 101 /* 102 * Create one free page pool. Since the ARM kernel virtual address 103 * space does not include a mapping onto the machine's entire physical 104 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default 105 * pool, VM_FREEPOOL_DEFAULT. 106 */ 107 #define VM_NFREEPOOL 1 108 #define VM_FREEPOOL_DEFAULT 0 109 #define VM_FREEPOOL_DIRECT 0 110 111 /* 112 * We need just one free list: DEFAULT. 113 */ 114 #define VM_NFREELIST 1 115 #define VM_FREELIST_DEFAULT 0 116 117 /* 118 * The largest allocation size is 1MB. 119 */ 120 #define VM_NFREEORDER 9 121 122 /* 123 * Enable superpage reservations: 1 level. 124 */ 125 #ifndef VM_NRESERVLEVEL 126 #define VM_NRESERVLEVEL 1 127 #endif 128 129 /* 130 * Level 0 reservations consist of 256 pages. 131 */ 132 #ifndef VM_LEVEL_0_ORDER 133 #define VM_LEVEL_0_ORDER 8 134 #endif 135 136 #define VM_MIN_ADDRESS (0x00001000) 137 #ifndef VM_MAXUSER_ADDRESS 138 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */ 139 #endif 140 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 141 142 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 143 #define USRSTACK SHAREDPAGE 144 145 /* initial pagein size of beginning of executable file */ 146 #ifndef VM_INITIAL_PAGEIN 147 #define VM_INITIAL_PAGEIN 16 148 #endif 149 150 #ifndef VM_MIN_KERNEL_ADDRESS 151 #define VM_MIN_KERNEL_ADDRESS KERNBASE 152 #endif 153 154 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address) 155 156 /* 157 * How many physical pages per kmem arena virtual page. 158 */ 159 #ifndef VM_KMEM_SIZE_SCALE 160 #define VM_KMEM_SIZE_SCALE (3) 161 #endif 162 163 /* 164 * Optional floor (in bytes) on the size of the kmem arena. 165 */ 166 #ifndef VM_KMEM_SIZE_MIN 167 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 168 #endif 169 170 /* 171 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 172 * kernel map. 173 */ 174 #ifndef VM_KMEM_SIZE_MAX 175 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \ 176 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 177 #endif 178 179 extern vm_offset_t vm_max_kernel_address; 180 181 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 182 183 #ifndef VM_MAX_AUTOTUNE_MAXUSERS 184 #define VM_MAX_AUTOTUNE_MAXUSERS 384 185 #endif 186 187 #define SFBUF 188 #define SFBUF_MAP 189 190 #define PMAP_HAS_DMAP 0 191 #define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; }) 192 #define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; }) 193 194 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH 195 196 #endif /* _MACHINE_VMPARAM_H_ */ 197