1 /*- 2 * Copyright (c) 2001 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas <matt@3am-softwre.com> of Allegro Networks, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the NetBSD 19 * Foundation, Inc. and its contributors. 20 * 4. Neither the name of The NetBSD Foundation nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #ifndef _POWERPC_OEA_VMPARAM_H_ 38 #define _POWERPC_OEA_VMPARAM_H_ 39 40 #include <sys/queue.h> 41 42 /* 43 * Most of the definitions in this can be overriden by a machine-specific 44 * vmparam.h if required. Otherwise a port can just include this file 45 * get the right thing to happen. 46 */ 47 48 /* 49 * OEA processors have 4K pages. Override the PAGE_* definitions 50 * to be compile-time constants. 51 */ 52 #define PAGE_SHIFT 12 53 #define PAGE_SIZE (1 << PAGE_SHIFT) 54 #define PAGE_MASK (PAGE_SIZE - 1) 55 56 #ifndef USRSTACK 57 #define USRSTACK VM_MAXUSER_ADDRESS 58 #endif 59 60 #ifndef USRSTACK32 61 #define USRSTACK32 ((uint32_t)VM_MAXUSER_ADDRESS) 62 #endif 63 64 #ifndef MAXTSIZ 65 #define MAXTSIZ (64*1024*1024) /* maximum text size */ 66 #endif 67 68 #ifndef MAXDSIZ 69 #define MAXDSIZ (1024*1024*1024) /* maximum data size */ 70 #endif 71 72 #ifndef MAXSSIZ 73 #define MAXSSIZ (32*1024*1024) /* maximum stack size */ 74 #endif 75 76 #ifndef DFLDSIZ 77 #define DFLDSIZ (128*1024*1024) /* default data size */ 78 #endif 79 80 #ifndef DFLSSIZ 81 #define DFLSSIZ (2*1024*1024) /* default stack size */ 82 #endif 83 84 /* 85 * Default maximum amount of shared memory pages 86 */ 87 #ifndef SHMMAXPGS 88 #define SHMMAXPGS 1024 89 #endif 90 91 /* 92 * Default number of pages in the user raw I/O map. 93 */ 94 #ifndef USRIOSIZE 95 #define USRIOSIZE 1024 96 #endif 97 98 /* 99 * The number of seconds for a process to be blocked before being 100 * considered very swappable. 101 */ 102 #ifndef MAXSLP 103 #define MAXSLP 20 104 #endif 105 106 /* 107 * Segment handling stuff 108 */ 109 #define SEGMENT_LENGTH ( 0x10000000L) 110 #define SEGMENT_MASK (~0x0fffffffL) 111 112 /* 113 * Macros to manipulate VSIDs 114 */ 115 #if 0 116 /* 117 * Move the SR# to the top 4 bits to make the lower 20 bits entirely random 118 * so to give better PTE distribution. 119 */ 120 #define VSID_MAKE(sr, hash) (((sr) << (ADDR_SR_SHFT-4))|((hash) & 0xfffff)) 121 #define VSID_TO_SR(vsid) (((vsid) >> (ADDR_SR_SHFT-4)) & 0xF) 122 #define VSID_TO_HASH(vsid) ((vsid) & 0xfffff) 123 #define VSID_SR_INCREMENT 0x00100000 124 #else 125 #define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4)) 126 #define VSID_TO_SR(vsid) ((vsid) & 0xF) 127 #define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff) 128 #define VSID_SR_INCREMENT 0x00000001 129 #endif 130 131 /* 132 * Fixed segments 133 */ 134 #ifndef USER_SR 135 #define USER_SR 12 136 #endif 137 #ifndef KERNEL_SR 138 #define KERNEL_SR 13 139 #endif 140 #ifndef KERNEL2_SR 141 #define KERNEL2_SR 14 142 #endif 143 #define KERNEL2_SEGMENT VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS) 144 #define KERNEL_VSIDBITS 0xfffff 145 #define KERNEL_SEGMENT VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS) 146 #define EMPTY_SEGMENT VSID_MAKE(0, KERNEL_VSIDBITS) 147 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 148 149 /* 150 * Some system constants 151 */ 152 #ifndef NPMAPS 153 #define NPMAPS 32768 /* Number of pmaps in system */ 154 #endif 155 156 #define VM_MIN_ADDRESS ((vaddr_t) 0) 157 #define VM_MAXUSER_ADDRESS ((vaddr_t) ~0xfffL) 158 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 159 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT)) 160 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH) 161 162 /* 163 * The address to which unspecified mapping requests default 164 * Put the stack in it's own segment and start mmaping at the 165 * top of the next lower segment. 166 */ 167 #ifdef _KERNEL_OPT 168 #include "opt_uvm.h" 169 #endif 170 #define __HAVE_TOPDOWN_VM 171 #ifdef USE_TOPDOWN_VM 172 #define VM_DEFAULT_ADDRESS(da, sz) \ 173 (((VM_MAXUSER_ADDRESS - MAXSSIZ) & SEGMENT_MASK) - round_page(sz)) 174 #endif 175 176 #ifndef VM_PHYSSEG_MAX 177 #define VM_PHYSSEG_MAX 16 178 #endif 179 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 180 #define VM_PHYSSEG_NOADD 181 182 #ifndef VM_PHYS_SIZE 183 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 184 #endif 185 186 #ifndef VM_MAX_KERNEL_BUF 187 #define VM_MAX_KERNEL_BUF (SEGMENT_LENGTH * 3 / 4) 188 #endif 189 190 #define VM_NFREELIST 16 /* 16 distinct memory segments */ 191 #define VM_FREELIST_DEFAULT 0 192 #define VM_FREELIST_FIRST256 1 193 #define VM_FREELIST_FIRST16 2 194 #define VM_FREELIST_MAX 3 195 196 #ifndef _LOCORE 197 198 LIST_HEAD(pvo_head, pvo_entry); 199 200 #if __NetBSD_Version__ > 105180000 201 #define __HAVE_VM_PAGE_MD 202 203 struct vm_page_md { 204 struct pvo_head mdpg_pvoh; 205 unsigned int mdpg_attrs; 206 }; 207 208 #define VM_MDPAGE_INIT(pg) do { \ 209 LIST_INIT(&(pg)->mdpage.mdpg_pvoh); \ 210 (pg)->mdpage.mdpg_attrs = 0; \ 211 } while (/*CONSTCOND*/0) 212 213 #else 214 215 #define __HAVE_PMAP_PHYSSEG 216 217 struct pmap_physseg { 218 struct pvo_head *pvoh; 219 char *attrs; 220 }; 221 222 #endif 223 224 #endif /* _LOCORE */ 225 226 #endif /* _POWERPC_OEA_VMPARAM_H_ */ 227