vmparam.h revision 1.5
1/* $NetBSD: vmparam.h,v 1.5 2001/11/11 16:44:16 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 1988 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#ifndef _ARM32_VMPARAM_H_ 37#define _ARM32_VMPARAM_H_ 38 39/* for pt_entry_t definition */ 40#include <machine/pte.h> 41 42#include <arm/arm32/vmparam.h> 43 44#define USRTEXT VM_MIN_ADDRESS 45#define USRSTACK VM_MAXUSER_ADDRESS 46 47/* 48 * Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have 49 * to change the compiler to not generate bl instructions 50 */ 51#define MAXTSIZ (16*1024*1024) /* max text size */ 52#ifndef DFLDSIZ 53#define DFLDSIZ (128*1024*1024) /* initial data size limit */ 54#endif 55#ifndef MAXDSIZ 56#define MAXDSIZ (512*1024*1024) /* max data size */ 57#endif 58#ifndef DFLSSIZ 59#define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 60#endif 61#ifndef MAXSSIZ 62#define MAXSSIZ (8*1024*1024) /* max stack size */ 63#endif 64 65/* 66 * Size of shared memory map 67 */ 68#ifndef SHMMAXPGS 69#define SHMMAXPGS 1024 70#endif 71 72/* 73 * The time for a process to be blocked before being very swappable. 74 * This is a number of seconds which the system takes as being a non-trivial 75 * amount of real time. You probably shouldn't change this; 76 * it is used in subtle ways (fractions and multiples of it are, that is, like 77 * half of a `long time'', almost a long time, etc.) 78 * It is related to human patience and other factors which don't really 79 * change over time. 80 */ 81#define MAXSLP 20 82 83/* 84 * Address space constants 85 */ 86 87/* 88 * The line between user space and kernel space 89 * Mappings >= KERNEL_SPACE_START are constant across all processes 90 */ 91#define KERNEL_SPACE_START 0xf0000000 92 93/* total number of page table entries to map 4GB * size of each entry*/ 94#define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t)) 95 96/* Address where the page tables are mapped */ 97#define PAGE_TABLE_SPACE_START (KERNEL_SPACE_START - PAGE_TABLE_SPACE) 98 99/* Various constants used by the MD code*/ 100#define KERNEL_BASE 0xf0000000 101#define KERNEL_TEXT_BASE (KERNEL_BASE + 0xc000) 102#define ALT_PAGE_TBLS_BASE 0xf0c00000 103#define KERNEL_VM_BASE 0xf1000000 104/* 105 * The Kernel VM Size varies depending on the machine depending on how 106 * much space is needed (and where) for other mappings. 107 * In some cases the chosen value may not be the maximum in order that 108 * we don't waste memory with kernel pages tables as we can't currently 109 * grow the kernel page tables after booting. 110 * You only need to increase these values if you find that the number of 111 * buffers is being limited due to lack of VA space. 112 */ 113/* 114 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space 115 * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff 116 */ 117#define KERNEL_VM_SIZE 0x06000000 118#define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START 119 120/* 121 * Override the default pager_map size, there's not enough KVA. 122 */ 123#define PAGER_MAP_SIZE (4 * 1024 * 1024) 124 125/* 126 * Mach derived constants 127 */ 128 129#define VM_MIN_ADDRESS ((vm_offset_t)0x00001000) 130#define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG)) 131#define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t))) 132 133#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE) 134#define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE)) 135#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff) 136 137/* 138 * Size of User Raw I/O map 139 */ 140 141#define USRIOSIZE 300 142 143/* XXX max. amount of KVM to be used by buffers. */ 144#ifndef VM_MAX_KERNEL_BUF 145#define VM_MAX_KERNEL_BUF \ 146 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10) 147#endif 148 149/* virtual sizes (bytes) for various kernel submaps */ 150 151#define VM_PHYS_SIZE (USRIOSIZE*NBPG) 152 153/* 154 * max number of non-contig chunks of physical RAM you can have 155 */ 156 157#define VM_PHYSSEG_MAX 32 158 159/* 160 * when converting a physical address to a vm_page structure, we 161 * want to use a binary search on the chunks of physical memory 162 * to find our RAM 163 */ 164 165#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 166 167/* 168 * this indicates that we can't add RAM to the VM system after the 169 * vm system is init'd. 170 */ 171 172#define VM_PHYSSEG_NOADD 173 174/* 175 * we support 2 free lists: 176 * 177 * - DEFAULT for all systems 178 * - ISADMA for the ISA DMA range on Sharks only 179 */ 180 181#define VM_NFREELIST 2 182#define VM_FREELIST_DEFAULT 0 183#define VM_FREELIST_ISADMA 1 184 185/* 186 * define structure pmap_physseg: there is one of these structures 187 * for each chunk of noncontig RAM you have. 188 */ 189 190#define __HAVE_PMAP_PHYSSEG 191 192struct pmap_physseg { 193 struct pv_head *pvhead; /* pv_entry array */ 194 char *attrs; /* attrs array */ 195}; 196 197#endif /* _ARM32_VMPARAM_H_ */ 198 199/* End of vmparam.h */ 200