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 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)vm.h 8.2 (Berkeley) 12/13/93 32 * @(#)vm_prot.h 8.1 (Berkeley) 6/11/93 33 * @(#)vm_inherit.h 8.1 (Berkeley) 6/11/93 34 * 35 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 36 * All rights reserved. 37 * 38 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 39 * 40 * Permission to use, copy, modify and distribute this software and 41 * its documentation is hereby granted, provided that both the copyright 42 * notice and this permission notice appear in all copies of the 43 * software, derivative works or modified versions, and any portions 44 * thereof, and that both notices appear in supporting documentation. 45 * 46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 49 * 50 * Carnegie Mellon requests users of this software to return to 51 * 52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 53 * School of Computer Science 54 * Carnegie Mellon University 55 * Pittsburgh PA 15213-3890 56 * 57 * any improvements or extensions that they make and grant Carnegie the 58 * rights to redistribute these changes. 59 * 60 * $FreeBSD$ 61 */ 62 63 #ifndef VM_H 64 #define VM_H 65 66 #include <machine/vm.h> 67 68 typedef char vm_inherit_t; /* inheritance codes */ 69 70 #define VM_INHERIT_SHARE ((vm_inherit_t) 0) 71 #define VM_INHERIT_COPY ((vm_inherit_t) 1) 72 #define VM_INHERIT_NONE ((vm_inherit_t) 2) 73 #define VM_INHERIT_ZERO ((vm_inherit_t) 3) 74 #define VM_INHERIT_DEFAULT VM_INHERIT_COPY 75 76 typedef u_char vm_prot_t; /* protection codes */ 77 78 #define VM_PROT_NONE ((vm_prot_t) 0x00) 79 #define VM_PROT_READ ((vm_prot_t) 0x01) 80 #define VM_PROT_WRITE ((vm_prot_t) 0x02) 81 #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) 82 #define VM_PROT_COPY ((vm_prot_t) 0x08) /* copy-on-read */ 83 #define VM_PROT_FAULT_LOOKUP ((vm_prot_t) 0x010) 84 85 #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE) 86 #define VM_PROT_RW (VM_PROT_READ|VM_PROT_WRITE) 87 #define VM_PROT_DEFAULT VM_PROT_ALL 88 89 enum obj_type { OBJT_DEFAULT, OBJT_SWAP, OBJT_VNODE, OBJT_DEVICE, OBJT_PHYS, 90 OBJT_DEAD, OBJT_SG, OBJT_MGTDEVICE }; 91 typedef u_char objtype_t; 92 93 union vm_map_object; 94 typedef union vm_map_object vm_map_object_t; 95 96 struct vm_map_entry; 97 typedef struct vm_map_entry *vm_map_entry_t; 98 99 struct vm_map; 100 typedef struct vm_map *vm_map_t; 101 102 struct vm_object; 103 typedef struct vm_object *vm_object_t; 104 105 #ifndef _KERNEL 106 /* 107 * This is defined in <sys/types.h> for the kernel so that non-vm kernel 108 * sources (mainly Mach-derived ones such as ddb) don't have to include 109 * vm stuff. Defining it there for applications might break things. 110 * Define it here for "applications" that include vm headers (e.g., 111 * genassym). 112 */ 113 typedef int boolean_t; 114 115 /* 116 * The exact set of memory attributes is machine dependent. However, 117 * every machine is required to define VM_MEMATTR_DEFAULT and 118 * VM_MEMATTR_UNCACHEABLE. 119 */ 120 typedef char vm_memattr_t; /* memory attribute codes */ 121 122 /* 123 * This is defined in <sys/types.h> for the kernel so that vnode_if.h 124 * doesn't have to include <vm/vm.h>. 125 */ 126 struct vm_page; 127 typedef struct vm_page *vm_page_t; 128 #endif /* _KERNEL */ 129 130 struct vm_reserv; 131 typedef struct vm_reserv *vm_reserv_t; 132 133 /* 134 * Information passed from the machine-independant VM initialization code 135 * for use by machine-dependant code (mainly for MMU support) 136 */ 137 struct kva_md_info { 138 vm_offset_t buffer_sva; 139 vm_offset_t buffer_eva; 140 vm_offset_t clean_sva; 141 vm_offset_t clean_eva; 142 }; 143 144 extern struct kva_md_info kmi; 145 extern void vm_ksubmap_init(struct kva_md_info *); 146 147 extern int old_mlock; 148 149 struct ucred; 150 int swap_reserve(vm_ooffset_t incr); 151 int swap_reserve_by_cred(vm_ooffset_t incr, struct ucred *cred); 152 void swap_reserve_force(vm_ooffset_t incr); 153 void swap_release(vm_ooffset_t decr); 154 void swap_release_by_cred(vm_ooffset_t decr, struct ucred *cred); 155 void swapper(void); 156 157 #endif /* VM_H */ 158 159