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 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _POWERPC_OEA_VMPARAM_H_ 31 #define _POWERPC_OEA_VMPARAM_H_ 32 33 #include <sys/queue.h> 34 35 /* 36 * Most of the definitions in this can be overriden by a machine-specific 37 * vmparam.h if required. Otherwise a port can just include this file 38 * get the right thing to happen. 39 */ 40 41 /* 42 * OEA processors have 4K pages. Override the PAGE_* definitions 43 * to be compile-time constants. 44 */ 45 #define PAGE_SHIFT 12 46 #define PAGE_SIZE (1 << PAGE_SHIFT) 47 #define PAGE_MASK (PAGE_SIZE - 1) 48 49 #ifndef USRSTACK 50 #define USRSTACK VM_MAXUSER_ADDRESS 51 #endif 52 53 #ifndef USRSTACK32 54 #define USRSTACK32 ((uint32_t)VM_MAXUSER_ADDRESS) 55 #endif 56 57 #ifndef MAXTSIZ 58 #define MAXTSIZ (64*1024*1024) /* maximum text size */ 59 #endif 60 61 #ifndef MAXDSIZ 62 #define MAXDSIZ (1024*1024*1024) /* maximum data size */ 63 #endif 64 65 #ifndef MAXSSIZ 66 #define MAXSSIZ (32*1024*1024) /* maximum stack size */ 67 #endif 68 69 #ifndef DFLDSIZ 70 #define DFLDSIZ (256*1024*1024) /* default data size */ 71 #endif 72 73 #ifndef DFLSSIZ 74 #define DFLSSIZ (2*1024*1024) /* default stack size */ 75 #endif 76 77 /* 78 * Default maximum amount of shared memory pages 79 */ 80 #ifndef SHMMAXPGS 81 #define SHMMAXPGS 1024 82 #endif 83 84 /* 85 * Default number of pages in the user raw I/O map. 86 */ 87 #ifndef USRIOSIZE 88 #define USRIOSIZE 1024 89 #endif 90 91 /* 92 * The number of seconds for a process to be blocked before being 93 * considered very swappable. 94 */ 95 #ifndef MAXSLP 96 #define MAXSLP 20 97 #endif 98 99 /* 100 * Segment handling stuff 101 */ 102 #define SEGMENT_LENGTH ( 0x10000000L) 103 #define SEGMENT_MASK (~0x0fffffffL) 104 105 /* 106 * Macros to manipulate VSIDs 107 */ 108 #if 0 109 /* 110 * Move the SR# to the top bits to make the lower bits entirely random 111 * so to give better PTE distribution. 112 */ 113 #define VSID__KEYSHFT (SR_VSID_WIDTH - SR_KEY_LEN) 114 #define VSID_SR_INCREMENT ((1L << VSID__KEYSHFT) - 1) 115 #define VSID__HASHMASK (VSID_SR_INCREMENT - 1) 116 #define VSID_MAKE(sr, hash) \ 117 (( \ 118 (((sr) << VSID__KEYSHFT) | ((hash) & VSID__HASMASK)) 119 << SR_VSID_SHFT) & SR_VSID) 120 #define VSID_TO_SR(vsid) \ 121 (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__KEYSHFT)) 122 #define VSID_TO_HASH(vsid) \ 123 (((vsid) & SR_VSID) >> SR_VSID_SHFT) & VSID__HASHMASK) 124 #else 125 #define VSID__HASHSHFT (SR_KEY_LEN) 126 #define VSID_SR_INCREMENT (1L << 0) 127 #define VSID__KEYMASK ((1L << VSID__HASHSHFT) - 1) 128 #define VSID_MAKE(sr, hash) \ 129 (( \ 130 (((hash) << VSID__HASHSHFT) | ((sr) & VSID__KEYMASK)) \ 131 << SR_VSID_SHFT) & SR_VSID) 132 #define VSID_TO_SR(vsid) \ 133 (((vsid) >> SR_VSID_SHFT) & VSID__KEYMASK) 134 #define VSID_TO_HASH(vsid) \ 135 (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__HASHSHFT)) 136 #endif /*0*/ 137 138 /* 139 * Fixed segments 140 */ 141 #ifndef USER_SR 142 #define USER_SR 12 143 #endif 144 #ifndef KERNEL_SR 145 #define KERNEL_SR 13 146 #endif 147 #ifndef KERNEL2_SR 148 #define KERNEL2_SR 14 149 #endif 150 #define KERNEL2_SEGMENT VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS) 151 #define KERNEL_VSIDBITS 0xfffff 152 #define PHYSMAP_VSIDBITS 0xffffe 153 #define PHYSMAPN_SEGMENT(s) VSID_MAKE(s, PHYSMAP_VSIDBITS) 154 #define KERNEL_SEGMENT VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS) 155 #define KERNELN_SEGMENT(s) VSID_MAKE(s, KERNEL_VSIDBITS) 156 /* XXXSL: need something here that will never be mapped */ 157 #define EMPTY_SEGMENT VSID_MAKE(0, 0xffffe) 158 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 159 160 /* 161 * Some system constants 162 */ 163 #ifndef NPMAPS 164 #define NPMAPS 32768 /* Number of pmaps in system */ 165 #endif 166 167 #define VM_MIN_ADDRESS ((vaddr_t) 0) 168 #define VM_MAXUSER_ADDRESS ((vaddr_t) ~0xfffL) 169 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 170 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT)) 171 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH) 172 173 /* 174 * The address to which unspecified mapping requests default 175 * Put the stack in it's own segment and start mmaping at the 176 * top of the next lower segment. 177 */ 178 #ifdef _KERNEL_OPT 179 #include "opt_uvm.h" 180 #endif 181 #define __USE_TOPDOWN_VM 182 #define VM_DEFAULT_ADDRESS(da, sz) \ 183 (((VM_MAXUSER_ADDRESS - MAXSSIZ) & SEGMENT_MASK) - round_page(sz)) 184 185 #ifndef VM_PHYSSEG_MAX 186 #define VM_PHYSSEG_MAX 16 187 #endif 188 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 189 #define VM_PHYSSEG_NOADD 190 191 #ifndef VM_PHYS_SIZE 192 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 193 #endif 194 195 #ifndef VM_MAX_KERNEL_BUF 196 #define VM_MAX_KERNEL_BUF (SEGMENT_LENGTH * 3 / 4) 197 #endif 198 199 #define VM_NFREELIST 16 /* 16 distinct memory segments */ 200 #define VM_FREELIST_DEFAULT 0 201 #define VM_FREELIST_FIRST256 1 202 #define VM_FREELIST_FIRST16 2 203 #define VM_FREELIST_MAX 3 204 205 #ifndef _LOCORE 206 207 LIST_HEAD(pvo_head, pvo_entry); 208 209 #define __HAVE_VM_PAGE_MD 210 211 struct vm_page_md { 212 struct pvo_head mdpg_pvoh; 213 unsigned int mdpg_attrs; 214 }; 215 216 #define VM_MDPAGE_INIT(pg) do { \ 217 LIST_INIT(&(pg)->mdpage.mdpg_pvoh); \ 218 (pg)->mdpage.mdpg_attrs = 0; \ 219 } while (/*CONSTCOND*/0) 220 221 #endif /* _LOCORE */ 222 223 #endif /* _POWERPC_OEA_VMPARAM_H_ */ 224