File: /usr/src/linux/include/asm-mips64/mman.h

1     /*
2      * This file is subject to the terms and conditions of the GNU General Public
3      * License.  See the file "COPYING" in the main directory of this archive
4      * for more details.
5      *
6      * Copyright (C) 1995, 1999 by Ralf Baechle
7      */
8     #ifndef _ASM_MMAN_H
9     #define _ASM_MMAN_H
10     
11     /*
12      * Protections are chosen from these bits, OR'd together.  The
13      * implementation does not necessarily support PROT_EXEC or PROT_WRITE
14      * without PROT_READ.  The only guarantees are that no writing will be
15      * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
16      */
17     #define PROT_NONE	0x0		/* page can not be accessed */
18     #define PROT_READ	0x1		/* page can be read */
19     #define PROT_WRITE	0x2		/* page can be written */
20     #define PROT_EXEC	0x4		/* page can be executed */
21     
22     /*
23      * Flags for mmap
24      */
25     #define MAP_SHARED	0x001		/* Share changes */
26     #define MAP_PRIVATE	0x002		/* Changes are private */
27     #define MAP_TYPE	0x00f		/* Mask for type of mapping */
28     #define MAP_FIXED	0x010		/* Interpret addr exactly */
29     
30     /* not used by linux, but here to make sure we don't clash with ABI defines */
31     #define MAP_RENAME	0x020		/* Assign page to file */
32     #define MAP_AUTOGROW	0x040		/* File may grow by writing */
33     #define MAP_LOCAL	0x080		/* Copy on fork/sproc */
34     #define MAP_AUTORSRV	0x100		/* Logical swap reserved on demand */
35     
36     /* These are linux-specific */
37     #define MAP_NORESERVE	0x0400		/* don't check for reservations */
38     #define MAP_ANONYMOUS	0x0800		/* don't use a file */
39     #define MAP_GROWSDOWN	0x1000		/* stack-like segment */
40     #define MAP_DENYWRITE	0x2000		/* ETXTBSY */
41     #define MAP_EXECUTABLE	0x4000		/* mark it as an executable */
42     #define MAP_LOCKED	0x8000		/* pages are locked */
43     
44     /*
45      * Flags for msync
46      */
47     #define MS_ASYNC	0x0001		/* sync memory asynchronously */
48     #define MS_INVALIDATE	0x0002		/* invalidate mappings & caches */
49     #define MS_SYNC		0x0004		/* synchronous memory sync */
50     
51     /*
52      * Flags for mlockall
53      */
54     #define MCL_CURRENT	1		/* lock all current mappings */
55     #define MCL_FUTURE	2		/* lock all future mappings */
56     
57     #define MADV_NORMAL	0x0		/* default page-in behavior */
58     #define MADV_RANDOM	0x1		/* page-in minimum required */
59     #define MADV_SEQUENTIAL	0x2		/* read-ahead aggressively */
60     #define MADV_WILLNEED	0x3		/* pre-fault pages */
61     #define MADV_DONTNEED	0x4		/* discard these pages */
62     
63     /* compatibility flags */
64     #define MAP_ANON       MAP_ANONYMOUS
65     #define MAP_FILE       0
66     
67     #endif /* _ASM_MMAN_H */
68