1 /* $NetBSD: vmparam.h,v 1.3 2011/01/18 01:02:54 matt Exp $ */ 2 /*- 3 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects 8 * Agency and which was developed by Matt Thomas of 3am Software Foundry. 9 * 10 * This material is based upon work supported by the Defense Advanced Research 11 * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under 12 * Contract No. N66001-09-C-2073. 13 * Approved for Public Release, Distribution Unlimited 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 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_BOOKE_VMPARAM_H_ 38 #define _POWERPC_BOOKE_VMPARAM_H_ 39 40 /* 41 * Most of the definitions in this can be overriden by a machine-specific 42 * vmparam.h if required. Otherwise a port can just include this file 43 * get the right thing to happen. 44 */ 45 46 /* 47 * BookE processors have 4K pages. Override the PAGE_* definitions to be 48 * compile-time constants. 49 */ 50 #define PAGE_SHIFT 12 51 #define PAGE_SIZE (1 << PAGE_SHIFT) 52 #define PAGE_MASK (PAGE_SIZE - 1) 53 54 #ifndef USRSTACK 55 #define USRSTACK VM_MAXUSER_ADDRESS 56 #endif 57 58 #ifndef MAXTSIZ 59 #define MAXTSIZ (2*256*1024*1024) /* maximum text size */ 60 #endif 61 62 #ifndef MAXDSIZ 63 #define MAXDSIZ (13*256*1024*1024U) /* maximum data size */ 64 #endif 65 66 #ifndef MAXSSIZ 67 #define MAXSSIZ (1*256*1024*1024-PAGE_SIZE) /* maximum stack size */ 68 #endif 69 70 #ifndef DFLDSIZ 71 #define DFLDSIZ (256*1024*1024) /* default data size */ 72 #endif 73 74 #ifndef DFLSSIZ 75 #define DFLSSIZ (2*1024*1024) /* default stack size */ 76 #endif 77 78 /* 79 * Default number of pages in the user raw I/O map. 80 */ 81 #ifndef USRIOSIZE 82 #define USRIOSIZE 1024 83 #endif 84 85 /* 86 * The number of seconds for a process to be blocked before being 87 * considered very swappable. 88 */ 89 #ifndef MAXSLP 90 #define MAXSLP 20 91 #endif 92 93 /* 94 * Some system constants 95 */ 96 97 #define VM_MIN_ADDRESS ((vaddr_t) 0) 98 #define VM_MAXUSER_ADDRESS ((vaddr_t) /* -32768 */ 0x7fff8000) 99 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 100 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0xe4000000) 101 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xfefff000) 102 103 /* 104 * The address to which unspecified mapping requests default 105 * Put the stack in it's own segment and start mmaping at the 106 * top of the next lower segment. 107 */ 108 #ifdef _KERNEL_OPT 109 #include "opt_uvm.h" 110 #endif 111 #define __USE_TOPDOWN_VM 112 #define VM_DEFAULT_ADDRESS(da, sz) \ 113 ((VM_MAXUSER_ADDRESS - MAXSSIZ) - round_page(sz)) 114 115 #ifndef VM_PHYSSEG_MAX 116 #define VM_PHYSSEG_MAX 16 117 #endif 118 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 119 120 #ifndef VM_PHYS_SIZE 121 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 122 #endif 123 124 #define VM_NFREELIST 2 /* 16 distinct memory segments */ 125 #define VM_FREELIST_DEFAULT 0 126 #define VM_FREELIST_FIRST16 1 127 #define VM_FREELIST_MAX 2 128 129 #ifndef VM_NFREELIST 130 #define VM_NFREELIST 16 /* 16 distinct memory segments */ 131 #define VM_FREELIST_DEFAULT 0 132 #define VM_FREELIST_MAX 1 133 #endif 134 135 #define __HAVE_VM_PAGE_MD 136 #ifndef _LOCORE 137 138 typedef struct pv_entry { 139 struct pv_entry *pv_next; 140 struct pmap *pv_pmap; 141 vaddr_t pv_va; 142 } *pv_entry_t; 143 144 #define VM_PAGE_MD_REFERENCED 0x0001 /* page has been recently referenced */ 145 #define VM_PAGE_MD_MODIFIED 0x0002 /* page has been modified */ 146 #define VM_PAGE_MD_POOLPAGE 0x0004 /* page is used as a poolpage */ 147 #define VM_PAGE_MD_EXECPAGE 0x0008 /* page is exec mapped */ 148 #if 0 149 #define VM_PAGE_MD_UNCACHED 0x0010 /* page is mapped uncached */ 150 #endif 151 152 #ifdef VM_PAGE_MD_UNCACHED 153 #define VM_PAGE_MD_CACHED_P(pg) (((pg)->mdpage.mdpg_attrs & VM_PAGE_MD_UNCACHED) == 0) 154 #define VM_PAGE_MD_UNCACHED_P(pg) (((pg)->mdpage.mdpg_attrs & VM_PAGE_MD_UNCACHED) != 0) 155 #endif 156 #define VM_PAGE_MD_MODIFIED_P(pg) (((pg)->mdpage.mdpg_attrs & VM_PAGE_MD_MODIFIED) != 0) 157 #define VM_PAGE_MD_REFERENCED_P(pg) (((pg)->mdpage.mdpg_attrs & VM_PAGE_MD_REFERENCED) != 0) 158 #define VM_PAGE_MD_POOLPAGE_P(pg) (((pg)->mdpage.mdpg_attrs & VM_PAGE_MD_POOLPAGE) != 0) 159 #define VM_PAGE_MD_EXECPAGE_P(pg) (((pg)->mdpage.mdpg_attrs & VM_PAGE_MD_EXECPAGE) != 0) 160 161 struct vm_page_md { 162 struct pv_entry mdpg_first; /* pv_entry first */ 163 #ifdef MULTIPROCESSOR 164 volatile u_int mdpg_attrs; /* page attributes */ 165 kmutex_t *mdpg_lock; /* pv list lock */ 166 #define VM_PAGE_PVLIST_LOCK_INIT(pg) \ 167 (pg)->mdpage.mdpg_lock = NULL 168 #define VM_PAGE_PVLIST_LOCKED_P(pg) \ 169 (mutex_owner((pg)->mdpage.mdpg_lock) != 0) 170 #define VM_PAGE_PVLIST_LOCK(pg, list_change) \ 171 pmap_pvlist_lock(pg, list_change) 172 #define VM_PAGE_PVLIST_UNLOCK(pg) \ 173 mutex_spin_exit((pg)->mdpage.mdpg_lock); 174 #define VM_PAGE_PVLIST_GEN(pg) ((uint16_t)(pg->mdpage.mdpg_attrs >> 16)) 175 #else 176 u_int mdpg_attrs; /* page attributes */ 177 #define VM_PAGE_PVLIST_LOCK_INIT(pg) do { } while (/*CONSTCOND*/ 0) 178 #define VM_PAGE_PVLIST_LOCKED_P(pg) true 179 #define VM_PAGE_PVLIST_LOCK(pg, lc) (mutex_spin_enter(&pmap_pvlist_mutex), 0) 180 #define VM_PAGE_PVLIST_UNLOCK(pg) mutex_spin_exit(&pmap_pvlist_mutex) 181 #define VM_PAGE_PVLIST_GEN(pg) (0) 182 #endif 183 }; 184 185 #define VM_MDPAGE_INIT(pg) \ 186 do { \ 187 (pg)->mdpage.mdpg_first.pv_next = NULL; \ 188 (pg)->mdpage.mdpg_first.pv_pmap = NULL; \ 189 (pg)->mdpage.mdpg_first.pv_va = (pg)->phys_addr; \ 190 VM_PAGE_PVLIST_LOCK_INIT(pg); \ 191 (pg)->mdpage.mdpg_attrs = 0; \ 192 } while (/* CONSTCOND */ 0) 193 194 #endif /* _LOCORE */ 195 196 #endif /* _POWERPC_BOOKE_VMPARAM_H_ */ 197