vmparam.h revision 1.5
1/* $NetBSD: vmparam.h,v 1.5 2001/11/15 18:06:13 soren 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 * Address space constants 74 */ 75 76/* 77 * The line between user space and kernel space 78 * Mappings >= KERNEL_SPACE_START are constant across all processes 79 */ 80#define KERNEL_SPACE_START 0xf0000000 81 82/* total number of page table entries to map 4GB * size of each entry*/ 83#define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t)) 84 85/* Address where the page tables are mapped */ 86#define PAGE_TABLE_SPACE_START (KERNEL_SPACE_START - PAGE_TABLE_SPACE) 87 88/* Various constants used by the MD code*/ 89#define KERNEL_BASE 0xf0000000 90#define KERNEL_TEXT_BASE KERNEL_BASE 91#define ALT_PAGE_TBLS_BASE 0xf0c00000 92#define KERNEL_VM_BASE 0xf1000000 93/* 94 * The Kernel VM Size varies depending on the machine depending on how 95 * much space is needed (and where) for other mappings. 96 * In some cases the chosen value may not be the maximum in order that 97 * we don't waste memory with kernel pages tables as we can't currently 98 * grow the kernel page tables after booting. 99 * You only need to increase these values if you find that the number of 100 * buffers is being limited due to lack of VA space. 101 */ 102 103/* 104 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space 105 * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff 106 */ 107#define KERNEL_VM_SIZE 0x07000000 108#define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START 109 110/* 111 * Override the default pager_map size, there's not enough KVA. 112 */ 113#define PAGER_MAP_SIZE (4 * 1024 * 1024) 114 115/* 116 * Mach derived constants 117 */ 118 119#define VM_MIN_ADDRESS ((vm_offset_t)0x00001000) 120#define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG)) 121#define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t))) 122 123#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE) 124#define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE)) 125#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff) 126 127/* 128 * Size of User Raw I/O map 129 */ 130 131#define USRIOSIZE 300 132 133/* XXX max. amount of KVM to be used by buffers. */ 134#ifndef VM_MAX_KERNEL_BUF 135#define VM_MAX_KERNEL_BUF \ 136 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10) 137#endif 138 139/* virtual sizes (bytes) for various kernel submaps */ 140 141#define VM_PHYS_SIZE (USRIOSIZE*NBPG) 142 143/* 144 * max number of non-contig chunks of physical RAM you can have 145 */ 146 147#define VM_PHYSSEG_MAX 32 148 149/* 150 * when converting a physical address to a vm_page structure, we 151 * want to use a binary search on the chunks of physical memory 152 * to find our RAM 153 */ 154 155#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 156 157/* 158 * this indicates that we can't add RAM to the VM system after the 159 * vm system is init'd. 160 */ 161 162#define VM_PHYSSEG_NOADD 163 164/* 165 * we support 2 free lists: 166 * 167 * - DEFAULT for all systems 168 * - ISADMA for the ISA DMA range on Sharks only 169 */ 170 171#define VM_NFREELIST 2 172#define VM_FREELIST_DEFAULT 0 173#define VM_FREELIST_ISADMA 1 174 175/* 176 * define structure pmap_physseg: there is one of these structures 177 * for each chunk of noncontig RAM you have. 178 */ 179 180#define __HAVE_PMAP_PHYSSEG 181 182struct pmap_physseg { 183 struct pv_head *pvhead; /* pv_entry array */ 184 char *attrs; /* attrs array */ 185}; 186 187#endif /* _ARM32_VMPARAM_H_ */ 188 189/* End of vmparam.h */ 190