vmparam.h revision 1.7
1/* $NetBSD: vmparam.h,v 1.7 2001/11/23 17:39:05 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#ifdef _KERNEL 40 41#include <arm/arm32/vmparam.h> 42 43#define USRTEXT VM_MIN_ADDRESS 44#define USRSTACK VM_MAXUSER_ADDRESS 45 46/* 47 * Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have 48 * to change the compiler to not generate bl instructions 49 */ 50#define MAXTSIZ (16*1024*1024) /* max text size */ 51#ifndef DFLDSIZ 52#define DFLDSIZ (128*1024*1024) /* initial data size limit */ 53#endif 54#ifndef MAXDSIZ 55#define MAXDSIZ (512*1024*1024) /* max data size */ 56#endif 57#ifndef DFLSSIZ 58#define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 59#endif 60#ifndef MAXSSIZ 61#define MAXSSIZ (8*1024*1024) /* max stack size */ 62#endif 63 64/* 65 * Size of shared memory map 66 */ 67#ifndef SHMMAXPGS 68#define SHMMAXPGS 1024 69#endif 70 71/* 72 * Address space constants 73 */ 74 75/* 76 * The line between user space and kernel space 77 * Mappings >= KERNEL_SPACE_START are constant across all processes 78 */ 79#define KERNEL_SPACE_START 0xf0000000 80 81/* total number of page table entries to map 4GB * size of each entry*/ 82#define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t)) 83 84/* Address where the page tables are mapped */ 85#define PAGE_TABLE_SPACE_START (KERNEL_SPACE_START - PAGE_TABLE_SPACE) 86 87/* Various constants used by the MD code*/ 88#define KERNEL_BASE 0xf0000000 89#define KERNEL_TEXT_BASE (KERNEL_BASE + 0xc000) 90#define ALT_PAGE_TBLS_BASE 0xf0c00000 91#define KERNEL_VM_BASE 0xf1000000 92/* 93 * The Kernel VM Size varies depending on the machine depending on how 94 * much space is needed (and where) for other mappings. 95 * In some cases the chosen value may not be the maximum in order that 96 * we don't waste memory with kernel pages tables as we can't currently 97 * grow the kernel page tables after booting. 98 * You only need to increase these values if you find that the number of 99 * buffers is being limited due to lack of VA space. 100 */ 101/* 102 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space 103 * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff 104 */ 105#define KERNEL_VM_SIZE 0x06000000 106#define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START 107 108/* 109 * Override the default pager_map size, there's not enough KVA. 110 */ 111#define PAGER_MAP_SIZE (4 * 1024 * 1024) 112 113/* 114 * Mach derived constants 115 */ 116 117#define VM_MIN_ADDRESS ((vm_offset_t)0x00001000) 118#define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG)) 119#define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t))) 120 121#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE) 122#define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE)) 123#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff) 124 125/* 126 * Size of User Raw I/O map 127 */ 128 129#define USRIOSIZE 300 130 131/* XXX max. amount of KVM to be used by buffers. */ 132#ifndef VM_MAX_KERNEL_BUF 133#define VM_MAX_KERNEL_BUF \ 134 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10) 135#endif 136 137/* virtual sizes (bytes) for various kernel submaps */ 138 139#define VM_PHYS_SIZE (USRIOSIZE*NBPG) 140 141/* 142 * max number of non-contig chunks of physical RAM you can have 143 */ 144 145#define VM_PHYSSEG_MAX 32 146 147/* 148 * when converting a physical address to a vm_page structure, we 149 * want to use a binary search on the chunks of physical memory 150 * to find our RAM 151 */ 152 153#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 154 155/* 156 * this indicates that we can't add RAM to the VM system after the 157 * vm system is init'd. 158 */ 159 160#define VM_PHYSSEG_NOADD 161 162/* 163 * we support 2 free lists: 164 * 165 * - DEFAULT for all systems 166 * - ISADMA for the ISA DMA range on Sharks only 167 */ 168 169#define VM_NFREELIST 2 170#define VM_FREELIST_DEFAULT 0 171#define VM_FREELIST_ISADMA 1 172 173#endif /* _KERNEL */ 174 175#endif /* _ARM32_VMPARAM_H_ */ 176