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 179extern 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