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 number of pages in the user raw I/O map. 79 */ 80 #ifndef USRIOSIZE 81 #define USRIOSIZE 1024 82 #endif 83 84 /* 85 * The number of seconds for a process to be blocked before being 86 * considered very swappable. 87 */ 88 #ifndef MAXSLP 89 #define MAXSLP 20 90 #endif 91 92 /* 93 * Segment handling stuff 94 */ 95 #define SEGMENT_LENGTH ( 0x10000000L) 96 #define SEGMENT_MASK (~0x0fffffffL) 97 98 /* 99 * Macros to manipulate VSIDs 100 */ 101 #if 0 102 /* 103 * Move the SR# to the top bits to make the lower bits entirely random 104 * so to give better PTE distribution. 105 */ 106 #define VSID__KEYSHFT (SR_VSID_WIDTH - SR_KEY_LEN) 107 #define VSID_SR_INCREMENT ((1L << VSID__KEYSHFT) - 1) 108 #define VSID__HASHMASK (VSID_SR_INCREMENT - 1) 109 #define VSID_MAKE(sr, hash) \ 110 (( \ 111 (((sr) << VSID__KEYSHFT) | ((hash) & VSID__HASMASK)) 112 << SR_VSID_SHFT) & SR_VSID) 113 #define VSID_TO_SR(vsid) \ 114 (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__KEYSHFT)) 115 #define VSID_TO_HASH(vsid) \ 116 (((vsid) & SR_VSID) >> SR_VSID_SHFT) & VSID__HASHMASK) 117 #else 118 #define VSID__HASHSHFT (SR_KEY_LEN) 119 #define VSID_SR_INCREMENT (1L << 0) 120 #define VSID__KEYMASK ((1L << VSID__HASHSHFT) - 1) 121 #define VSID_MAKE(sr, hash) \ 122 (( \ 123 (((hash) << VSID__HASHSHFT) | ((sr) & VSID__KEYMASK)) \ 124 << SR_VSID_SHFT) & SR_VSID) 125 #define VSID_TO_SR(vsid) \ 126 (((vsid) >> SR_VSID_SHFT) & VSID__KEYMASK) 127 #define VSID_TO_HASH(vsid) \ 128 (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__HASHSHFT)) 129 #endif /*0*/ 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 PHYSMAP_VSIDBITS 0xffffe 146 #define PHYSMAPN_SEGMENT(s) VSID_MAKE(s, PHYSMAP_VSIDBITS) 147 #define KERNEL_SEGMENT VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS) 148 #define KERNELN_SEGMENT(s) VSID_MAKE(s, KERNEL_VSIDBITS) 149 /* XXXSL: need something here that will never be mapped */ 150 #define EMPTY_SEGMENT VSID_MAKE(0, 0xffffe) 151 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 152 153 /* 154 * Some system constants 155 */ 156 #ifndef NPMAPS 157 #define NPMAPS 32768 /* Number of pmaps in system */ 158 #endif 159 160 #define VM_MIN_ADDRESS ((vaddr_t) 0) 161 #define VM_MAXUSER_ADDRESS ((vaddr_t) ~0xfffL) 162 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 163 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT)) 164 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH) 165 166 /* 167 * The address to which unspecified mapping requests default 168 * Put the stack in it's own segment and start mmaping at the 169 * top of the next lower segment. 170 */ 171 #ifdef _KERNEL_OPT 172 #include "opt_uvm.h" 173 #endif 174 #define __USE_TOPDOWN_VM 175 #define VM_DEFAULT_ADDRESS(da, sz) \ 176 (((VM_MAXUSER_ADDRESS - MAXSSIZ) & SEGMENT_MASK) - round_page(sz)) 177 178 #ifndef VM_PHYSSEG_MAX 179 #define VM_PHYSSEG_MAX 16 180 #endif 181 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 182 183 #ifndef VM_PHYS_SIZE 184 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 185 #endif 186 187 #ifndef VM_MAX_KERNEL_BUF 188 #define VM_MAX_KERNEL_BUF (SEGMENT_LENGTH * 3 / 4) 189 #endif 190 191 #define VM_NFREELIST 16 /* 16 distinct memory segments */ 192 #define VM_FREELIST_DEFAULT 0 193 #define VM_FREELIST_FIRST256 1 194 #define VM_FREELIST_FIRST16 2 195 #define VM_FREELIST_MAX 3 196 197 #endif /* _POWERPC_OEA_VMPARAM_H_ */ 198