1 /* $NetBSD: vmparam.h,v 1.4 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 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 /* 115 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space 116 * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff 117 */ 118 #define KERNEL_VM_SIZE 0x07000000 119 #define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START 120 121 /* 122 * Override the default pager_map size, there's not enough KVA. 123 */ 124 #define PAGER_MAP_SIZE (4 * 1024 * 1024) 125 126 /* 127 * Mach derived constants 128 */ 129 130 #define VM_MIN_ADDRESS ((vm_offset_t)0x00001000) 131 #define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG)) 132 #define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t))) 133 134 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE) 135 #define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE)) 136 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff) 137 138 /* 139 * Size of User Raw I/O map 140 */ 141 142 #define USRIOSIZE 300 143 144 /* XXX max. amount of KVM to be used by buffers. */ 145 #ifndef VM_MAX_KERNEL_BUF 146 #define VM_MAX_KERNEL_BUF \ 147 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10) 148 #endif 149 150 /* virtual sizes (bytes) for various kernel submaps */ 151 152 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 153 154 /* 155 * max number of non-contig chunks of physical RAM you can have 156 */ 157 158 #define VM_PHYSSEG_MAX 32 159 160 /* 161 * when converting a physical address to a vm_page structure, we 162 * want to use a binary search on the chunks of physical memory 163 * to find our RAM 164 */ 165 166 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 167 168 /* 169 * this indicates that we can't add RAM to the VM system after the 170 * vm system is init'd. 171 */ 172 173 #define VM_PHYSSEG_NOADD 174 175 /* 176 * we support 2 free lists: 177 * 178 * - DEFAULT for all systems 179 * - ISADMA for the ISA DMA range on Sharks only 180 */ 181 182 #define VM_NFREELIST 2 183 #define VM_FREELIST_DEFAULT 0 184 #define VM_FREELIST_ISADMA 1 185 186 /* 187 * define structure pmap_physseg: there is one of these structures 188 * for each chunk of noncontig RAM you have. 189 */ 190 191 #define __HAVE_PMAP_PHYSSEG 192 193 struct pmap_physseg { 194 struct pv_head *pvhead; /* pv_entry array */ 195 char *attrs; /* attrs array */ 196 }; 197 198 #endif /* _ARM32_VMPARAM_H_ */ 199 200 /* End of vmparam.h */ 201