1 /*- 2 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 7 * NASA Ames Research Center and by Chris G. Demetriou. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /*- 39 * Copyright (c) 1991 Regents of the University of California. 40 * All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department and William Jolitz of UUNET Technologies Inc. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * Derived from hp300 version by Mike Hibler, this version by William 71 * Jolitz uses a recursive map [a pde points to the page directory] to 72 * map the page tables using the pagetables themselves. This is done to 73 * reduce the impact on kernel virtual memory for lots of sparse address 74 * space, and to reduce the cost of memory to each process. 75 * 76 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 77 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 78 * from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp 79 * $FreeBSD: src/sys/ia64/include/pmap.h,v 1.25 2005/09/03 23:53:50 marcel Exp $ 80 */ 81 82 #ifndef _PMAP_MACHINE_ 83 #define _PMAP_MACHINE_ 84 85 #include <sys/lock.h> 86 87 paddr_t vtophys(vaddr_t); 88 89 struct pv_entry; /* Forward declaration. */ 90 91 struct pmap { 92 TAILQ_ENTRY(pmap) pm_list; /* list of all pmaps */ 93 TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */ 94 int pm_count; /* pmap reference count */ 95 struct simplelock pm_slock; /* lock on pmap */ 96 u_int32_t pm_rid[5]; /* base RID for pmap */ 97 int pm_active; /* active flag */ 98 struct pmap_statistics pm_stats; /* pmap statistics */ 99 unsigned long pm_cpus; /* mask of CPUs using pmap */ 100 101 }; 102 103 typedef struct pmap *pmap_t; 104 105 /* 106 * For each vm_page_t, there is a list of all currently valid virtual 107 * mappings of that page. An entry is a pv_entry_t, the list is pv_pvlist. 108 */ 109 typedef struct pv_entry { 110 pmap_t pv_pmap; /* pmap where mapping lies */ 111 vaddr_t pv_va; /* virtual address for mapping */ 112 TAILQ_ENTRY(pv_entry) pv_list; 113 TAILQ_ENTRY(pv_entry) pv_plist; 114 } *pv_entry_t; 115 116 /* pvh_attrs */ 117 #define PGA_MODIFIED 0x01 /* modified */ 118 #define PGA_REFERENCED 0x02 /* referenced */ 119 120 121 extern struct pmap kernel_pmap_store; 122 123 #define pmap_kernel() (&kernel_pmap_store) 124 125 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 126 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 127 128 #define pmap_copy(dp, sp, da, l, sa) /* nothing */ 129 #define pmap_update(pmap) /* nothing (yet) */ 130 131 void pmap_bootstrap(void); 132 133 #define pmap_is_referenced(pg) \ 134 (((pg)->mdpage.pvh_attrs & PGA_REFERENCED) != 0) 135 #define pmap_is_modified(pg) \ 136 (((pg)->mdpage.pvh_attrs & PGA_MODIFIED) != 0) 137 138 139 #define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */ 140 141 /* 142 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 143 */ 144 #define PMAP_MAP_POOLPAGE(pa) IA64_PHYS_TO_RR7((pa)) 145 #define PMAP_UNMAP_POOLPAGE(va) IA64_RR_MASK((va)) 146 147 /* 148 * Macros for locking pmap structures. 149 * 150 * Note that we if we access the kernel pmap in interrupt context, it 151 * is only to update statistics. Since stats are updated using atomic 152 * operations, locking the kernel pmap is not necessary. Therefore, 153 * it is not necessary to block interrupts when locking pmap strucutres. 154 */ 155 #define PMAP_LOCK(pmap) simple_lock(&(pmap)->pm_slock) 156 #define PMAP_UNLOCK(pmap) simple_unlock(&(pmap)->pm_slock) 157 158 159 #define PMAP_VHPT_LOG2SIZE 16 160 161 162 #endif /* _PMAP_MACHINE_ */ 163