uvm_pmap.h revision 1.36
1 /* $NetBSD: uvm_pmap.h,v 1.36 2011/02/11 23:05:55 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * The Mach Operating System project at Carnegie-Mellon University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)pmap.h 8.1 (Berkeley) 6/11/93 35 * 36 * 37 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 38 * All rights reserved. 39 * 40 * Author: Avadis Tevanian, Jr. 41 * 42 * Permission to use, copy, modify and distribute this software and 43 * its documentation is hereby granted, provided that both the copyright 44 * notice and this permission notice appear in all copies of the 45 * software, derivative works or modified versions, and any portions 46 * thereof, and that both notices appear in supporting documentation. 47 * 48 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 49 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 50 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 51 * 52 * Carnegie Mellon requests users of this software to return to 53 * 54 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 55 * School of Computer Science 56 * Carnegie Mellon University 57 * Pittsburgh PA 15213-3890 58 * 59 * any improvements or extensions that they make and grant Carnegie the 60 * rights to redistribute these changes. 61 */ 62 63 /* 64 * Machine address mapping definitions -- machine-independent 65 * section. [For machine-dependent section, see "machine/pmap.h".] 66 */ 67 68 #ifndef _PMAP_VM_ 69 #define _PMAP_VM_ 70 71 struct lwp; /* for pmap_activate()/pmap_deactivate() proto */ 72 73 struct pmap; 74 typedef struct pmap *pmap_t; 75 76 /* 77 * Each machine dependent implementation is expected to 78 * keep certain statistics. They may do this anyway they 79 * so choose, but are expected to return the statistics 80 * in the following structure. 81 */ 82 struct pmap_statistics { 83 long resident_count; /* # of pages mapped (total)*/ 84 long wired_count; /* # of pages wired */ 85 }; 86 typedef struct pmap_statistics *pmap_statistics_t; 87 88 #ifdef _KERNEL 89 90 extern struct pmap *const kernel_pmap_ptr; 91 #define pmap_kernel() kernel_pmap_ptr 92 93 #include <machine/pmap.h> 94 95 #endif 96 97 /* 98 * Flags passed to pmap_enter(). Note the bottom 3 bits are VM_PROT_* 99 * bits, used to indicate the access type that was made (to seed modified 100 * and referenced information). 101 * 102 * Flags marked [PA] are for pmap_kenter_pa() only. Flags marked [BOTH] 103 * apply to pmap_kenter_pa() and pmap_enter(). All other flags are valid 104 * for pmap_enter() only. 105 */ 106 #define PMAP_WIRED 0x00000010 /* wired mapping */ 107 #define PMAP_CANFAIL 0x00000020 /* can fail if resource shortage */ 108 #if defined(PMAP_ENABLE_PMAP_KMPAGE) 109 #define PMAP_KMPAGE 0x00000040 /* [PA] page used for kernel memory */ 110 #else 111 #define PMAP_KMPAGE 0x00000000 112 #endif /* PMAP_ENABLE_PMAP_KMPAGE */ 113 114 #define PMAP_MD_MASK 0xff000000 /* [BOTH] Machine-dependent bits */ 115 #define PMAP_PROT_MASK 0x0000000f /* [BOTH] VM_PROT_* bit mask */ 116 117 /* 118 * Cache Type Encodings 119 */ 120 #define PMAP_CACHE_MASK 0x00000f00 121 122 /* All accesses are uncacheable. No speculative accesses. */ 123 #define PMAP_NOCACHE 0x00000100 /* [BOTH] */ 124 125 /* All accesses are uncacheable. No speculative accesses. 126 * Writes are combined. */ 127 #define PMAP_WRITE_COMBINE 0x00000200 /* [BOTH] */ 128 129 /* On reads, cachelines become shared or exclusive if allocated on cache miss. 130 * On writes, cachelines become modified on a cache miss. */ 131 #define PMAP_WRITE_BACK 0x00000300 /* [BOTH] */ 132 133 /* = PMAP_NOCACHE but overrideable (e.g. on x86 by MTRRs) */ 134 #define PMAP_NOCACHE_OVR 0x00000400 /* [BOTH] */ 135 136 137 #ifndef PMAP_EXCLUDE_DECLS /* Used in Sparc port to virtualize pmap mod */ 138 #ifdef _KERNEL 139 __BEGIN_DECLS 140 void pmap_activate(struct lwp *); 141 void pmap_deactivate(struct lwp *); 142 void pmap_unwire(pmap_t, vaddr_t); 143 144 #if !defined(pmap_clear_modify) 145 bool pmap_clear_modify(struct vm_page *); 146 #endif 147 #if !defined(pmap_clear_reference) 148 bool pmap_clear_reference(struct vm_page *); 149 #endif 150 151 #if !defined(pmap_copy) 152 void pmap_copy(pmap_t, pmap_t, vaddr_t, vsize_t, vaddr_t); 153 #endif 154 #if !defined(pmap_copy_page) 155 void pmap_copy_page(paddr_t, paddr_t); 156 #endif 157 struct pmap *pmap_create(void); 158 void pmap_destroy(pmap_t); 159 int pmap_enter(pmap_t, vaddr_t, paddr_t, vm_prot_t, u_int); 160 bool pmap_extract(pmap_t, vaddr_t, paddr_t *); 161 #if defined(PMAP_GROWKERNEL) 162 vaddr_t pmap_growkernel(vaddr_t); 163 #endif 164 165 void pmap_init(void); 166 167 void pmap_kenter_pa(vaddr_t, paddr_t, vm_prot_t, u_int); 168 void pmap_kremove(vaddr_t, vsize_t); 169 #if !defined(pmap_is_modified) 170 bool pmap_is_modified(struct vm_page *); 171 #endif 172 #if !defined(pmap_is_referenced) 173 bool pmap_is_referenced(struct vm_page *); 174 #endif 175 176 void pmap_page_protect(struct vm_page *, vm_prot_t); 177 178 #if !defined(pmap_phys_address) 179 paddr_t pmap_phys_address(paddr_t); 180 #endif 181 #if !defined(pmap_mmap_flags) 182 #define pmap_mmap_flags(x) 0 183 #endif 184 void pmap_protect(pmap_t, vaddr_t, vaddr_t, vm_prot_t); 185 #if !defined(pmap_reference) 186 void pmap_reference(pmap_t); 187 #endif 188 #if !defined(pmap_remove) 189 void pmap_remove(pmap_t, vaddr_t, vaddr_t); 190 #endif 191 void pmap_remove_all(struct pmap *); 192 #if !defined(pmap_update) 193 void pmap_update(pmap_t); 194 #endif 195 #if !defined(pmap_resident_count) 196 long pmap_resident_count(pmap_t); 197 #endif 198 #if !defined(pmap_wired_count) 199 long pmap_wired_count(pmap_t); 200 #endif 201 #if !defined(pmap_zero_page) 202 void pmap_zero_page(paddr_t); 203 #endif 204 205 void pmap_virtual_space(vaddr_t *, vaddr_t *); 206 #if defined(PMAP_STEAL_MEMORY) 207 vaddr_t pmap_steal_memory(vsize_t, vaddr_t *, vaddr_t *); 208 #endif 209 210 #if defined(PMAP_FORK) 211 void pmap_fork(pmap_t, pmap_t); 212 #endif 213 __END_DECLS 214 #endif /* kernel*/ 215 #endif /* PMAP_EXCLUDE_DECLS */ 216 217 #endif /* _PMAP_VM_ */ 218
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