1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vm.h 8.2 (Berkeley) 12/13/93 30 * @(#)vm_prot.h 8.1 (Berkeley) 6/11/93 31 * @(#)vm_inherit.h 8.1 (Berkeley) 6/11/93 32 * 33 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 34 * All rights reserved. 35 * 36 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 37 * 38 * Permission to use, copy, modify and distribute this software and 39 * its documentation is hereby granted, provided that both the copyright 40 * notice and this permission notice appear in all copies of the 41 * software, derivative works or modified versions, and any portions 42 * thereof, and that both notices appear in supporting documentation. 43 * 44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 47 * 48 * Carnegie Mellon requests users of this software to return to 49 * 50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 51 * School of Computer Science 52 * Carnegie Mellon University 53 * Pittsburgh PA 15213-3890 54 * 55 * any improvements or extensions that they make and grant Carnegie the 56 * rights to redistribute these changes. 57 * 58 * $FreeBSD$ 59 */ 60 61 #ifndef VM_H 62 #define VM_H 63 64 #include <machine/vm.h> 65 66 typedef char vm_inherit_t; /* inheritance codes */ 67 68 #define VM_INHERIT_SHARE ((vm_inherit_t) 0) 69 #define VM_INHERIT_COPY ((vm_inherit_t) 1) 70 #define VM_INHERIT_NONE ((vm_inherit_t) 2) 71 #define VM_INHERIT_ZERO ((vm_inherit_t) 3) 72 #define VM_INHERIT_DEFAULT VM_INHERIT_COPY 73 74 typedef u_char vm_prot_t; /* protection codes */ 75 76 #define VM_PROT_NONE ((vm_prot_t) 0x00) 77 #define VM_PROT_READ ((vm_prot_t) 0x01) 78 #define VM_PROT_WRITE ((vm_prot_t) 0x02) 79 #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) 80 #define VM_PROT_COPY ((vm_prot_t) 0x08) /* copy-on-read */ 81 #define VM_PROT_PRIV_FLAG ((vm_prot_t) 0x10) 82 #define VM_PROT_FAULT_LOOKUP VM_PROT_PRIV_FLAG 83 #define VM_PROT_QUICK_NOFAULT VM_PROT_PRIV_FLAG /* same to save bits */ 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