1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 * from: @(#)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@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 * $FreeBSD$ 63 */ 64 65 /* 66 * Machine address mapping definitions -- machine-independent 67 * section. [For machine-dependent section, see "machine/pmap.h".] 68 */ 69 70 #ifndef _PMAP_VM_ 71 #define _PMAP_VM_ 72 /* 73 * Each machine dependent implementation is expected to 74 * keep certain statistics. They may do this anyway they 75 * so choose, but are expected to return the statistics 76 * in the following structure. 77 */ 78 struct pmap_statistics { 79 long resident_count; /* # of pages mapped (total) */ 80 long wired_count; /* # of pages wired */ 81 }; 82 typedef struct pmap_statistics *pmap_statistics_t; 83 84 /* 85 * Each machine-dependent implementation is required to provide: 86 * 87 * vm_memattr_t pmap_page_get_memattr(vm_page_t); 88 * boolean_t pmap_page_is_mapped(vm_page_t); 89 * boolean_t pmap_page_is_write_mapped(vm_page_t); 90 * void pmap_page_set_memattr(vm_page_t, vm_memattr_t); 91 */ 92 #include <machine/pmap.h> 93 94 #ifdef _KERNEL 95 struct thread; 96 97 /* 98 * Updates to kernel_vm_end are synchronized by the kernel_map's system mutex. 99 */ 100 extern vm_offset_t kernel_vm_end; 101 102 /* 103 * Flags for pmap_enter(). The bits in the low-order byte are reserved 104 * for the protection code (vm_prot_t) that describes the fault type. 105 * Bits 24 through 31 are reserved for the pmap's internal use. 106 */ 107 #define PMAP_ENTER_NOSLEEP 0x00000100 108 #define PMAP_ENTER_WIRED 0x00000200 109 #define PMAP_ENTER_LARGEPAGE 0x00000400 110 #define PMAP_ENTER_RESERVED 0xFF000000 111 112 /* 113 * Define the maximum number of machine-dependent reference bits that are 114 * cleared by a call to pmap_ts_referenced(). This limit serves two purposes. 115 * First, it bounds the cost of reference bit maintenance on widely shared 116 * pages. Second, it prevents numeric overflow during maintenance of a 117 * widely shared page's "act_count" field. An overflow could result in the 118 * premature deactivation of the page. 119 */ 120 #define PMAP_TS_REFERENCED_MAX 5 121 122 void pmap_activate(struct thread *td); 123 void pmap_advise(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, 124 int advice); 125 void pmap_align_superpage(vm_object_t, vm_ooffset_t, vm_offset_t *, 126 vm_size_t); 127 void pmap_clear_modify(vm_page_t m); 128 void pmap_copy(pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t); 129 void pmap_copy_page(vm_page_t, vm_page_t); 130 void pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, 131 vm_page_t mb[], vm_offset_t b_offset, int xfersize); 132 int pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, 133 vm_prot_t prot, u_int flags, int8_t psind); 134 void pmap_enter_object(pmap_t pmap, vm_offset_t start, 135 vm_offset_t end, vm_page_t m_start, vm_prot_t prot); 136 void pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m, 137 vm_prot_t prot); 138 vm_paddr_t pmap_extract(pmap_t pmap, vm_offset_t va); 139 vm_page_t pmap_extract_and_hold(pmap_t pmap, vm_offset_t va, 140 vm_prot_t prot); 141 void pmap_growkernel(vm_offset_t); 142 void pmap_init(void); 143 boolean_t pmap_is_modified(vm_page_t m); 144 boolean_t pmap_is_prefaultable(pmap_t pmap, vm_offset_t va); 145 boolean_t pmap_is_referenced(vm_page_t m); 146 boolean_t pmap_is_valid_memattr(pmap_t, vm_memattr_t); 147 vm_offset_t pmap_map(vm_offset_t *, vm_paddr_t, vm_paddr_t, int); 148 int pmap_mincore(pmap_t pmap, vm_offset_t addr, vm_paddr_t *pap); 149 void pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, 150 vm_object_t object, vm_pindex_t pindex, vm_size_t size); 151 boolean_t pmap_page_exists_quick(pmap_t pmap, vm_page_t m); 152 void pmap_page_init(vm_page_t m); 153 int pmap_page_wired_mappings(vm_page_t m); 154 int pmap_pinit(pmap_t); 155 void pmap_pinit0(pmap_t); 156 void pmap_protect(pmap_t, vm_offset_t, vm_offset_t, vm_prot_t); 157 void pmap_qenter(vm_offset_t, vm_page_t *, int); 158 void pmap_qremove(vm_offset_t, int); 159 vm_offset_t pmap_quick_enter_page(vm_page_t); 160 void pmap_quick_remove_page(vm_offset_t); 161 void pmap_release(pmap_t); 162 void pmap_remove(pmap_t, vm_offset_t, vm_offset_t); 163 void pmap_remove_all(vm_page_t m); 164 void pmap_remove_pages(pmap_t); 165 void pmap_remove_write(vm_page_t m); 166 void pmap_sync_icache(pmap_t, vm_offset_t, vm_size_t); 167 int pmap_ts_referenced(vm_page_t m); 168 void pmap_unwire(pmap_t pmap, vm_offset_t start, vm_offset_t end); 169 void pmap_zero_page(vm_page_t); 170 void pmap_zero_page_area(vm_page_t, int off, int size); 171 172 #define pmap_resident_count(pm) ((pm)->pm_stats.resident_count) 173 #define pmap_wired_count(pm) ((pm)->pm_stats.wired_count) 174 175 #endif /* _KERNEL */ 176 #endif /* _PMAP_VM_ */ 177