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 177extern 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