2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2003-2019 The DragonFly Project. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * @(#)vm.h 8.2 (Berkeley) 12/13/93
31 * @(#)vm_prot.h 8.1 (Berkeley) 6/11/93
32 * @(#)vm_inherit.h 8.1 (Berkeley) 6/11/93
34 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
35 * All rights reserved.
37 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
39 * Permission to use, copy, modify and distribute this software and
40 * its documentation is hereby granted, provided that both the copyright
41 * notice and this permission notice appear in all copies of the
42 * software, derivative works or modified versions, and any portions
43 * thereof, and that both notices appear in supporting documentation.
45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
49 * Carnegie Mellon requests users of this software to return to
51 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
52 * School of Computer Science
53 * Carnegie Mellon University
54 * Pittsburgh PA 15213-3890
56 * any improvements or extensions that they make and grant Carnegie the
57 * rights to redistribute these changes.
59 * $FreeBSD: src/sys/vm/vm.h,v 1.16.2.1 2002/12/28 19:49:41 dillon Exp $
66 #include <sys/types.h>
68 #include <machine/specialreg.h>
70 typedef char vm_inherit_t; /* inheritance codes */
72 #define VM_INHERIT_SHARE ((vm_inherit_t) 0)
73 #define VM_INHERIT_COPY ((vm_inherit_t) 1)
74 #define VM_INHERIT_NONE ((vm_inherit_t) 2)
75 #define VM_INHERIT_DEFAULT VM_INHERIT_COPY
77 typedef u_char vm_prot_t; /* protection codes */
79 #define VM_PROT_NONE ((vm_prot_t) 0x00)
80 #define VM_PROT_READ ((vm_prot_t) 0x01)
81 #define VM_PROT_WRITE ((vm_prot_t) 0x02)
82 #define VM_PROT_EXECUTE ((vm_prot_t) 0x04)
83 #define VM_PROT_OVERRIDE_WRITE ((vm_prot_t) 0x08) /* copy-on-write */
84 #define VM_PROT_NOSYNC ((vm_prot_t) 0x10)
86 #define VM_PROT_RW (VM_PROT_READ|VM_PROT_WRITE)
87 #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
88 #define VM_PROT_DEFAULT VM_PROT_ALL
90 typedef u_char vm_maptype_t; /* type of vm_map_entry */
93 * NOTE: UKSMAPs are unmanaged. The underlying kernel memory must not be
94 * freed until all related mappings are gone. There is no object.
95 * The device can map different things for the same UKS mapping even
96 * when inherited via fork().
98 #define VM_MAPTYPE_UNSPECIFIED 0
99 #define VM_MAPTYPE_NORMAL 1
100 #define VM_MAPTYPE_VPAGETABLE 2
101 #define VM_MAPTYPE_SUBMAP 3
102 #define VM_MAPTYPE_UKSMAP 4 /* user-kernel shared memory */
107 typedef struct vm_object *vm_object_t;
110 * This is also defined in vm/vm_page.h.
112 #ifndef __VM_PAGE_T_DEFINED__
113 #define __VM_PAGE_T_DEFINED__
115 typedef struct vm_page *vm_page_t;
119 /* Memory attributes. */
121 #ifndef __VM_MEMATTR_T_DEFINED__
122 #define __VM_MEMATTR_T_DEFINED__
123 typedef char vm_memattr_t;
126 #define VM_MEMATTR_UNCACHEABLE ((vm_memattr_t)PAT_UNCACHEABLE)
127 #define VM_MEMATTR_WRITE_COMBINING ((vm_memattr_t)PAT_WRITE_COMBINING)
128 #define VM_MEMATTR_WRITE_THROUGH ((vm_memattr_t)PAT_WRITE_THROUGH)
129 #define VM_MEMATTR_WRITE_PROTECTED ((vm_memattr_t)PAT_WRITE_PROTECTED)
130 #define VM_MEMATTR_WRITE_BACK ((vm_memattr_t)PAT_WRITE_BACK)
131 #define VM_MEMATTR_WEAK_UNCACHEABLE ((vm_memattr_t)PAT_UNCACHED)
133 #define VM_MEMATTR_DEFAULT VM_MEMATTR_WRITE_BACK
135 #endif /* _VM_VM_H_ */