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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
6 * Copyright (C) 1995, 1999, 2002 by Ralf Baechle
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.
17 #define PROT_NONE 0x00 /* page can not be accessed */
18 #define PROT_READ 0x01 /* page can be read */
19 #define PROT_WRITE 0x02 /* page can be written */
20 #define PROT_EXEC 0x04 /* page can be executed */
21 /* 0x08 reserved for PROT_EXEC_NOFLUSH */
22 #define PROT_SEM 0x10 /* page may be used for atomic ops */
23 #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */
24 #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */
29 #define MAP_SHARED 0x001 /* Share changes */
30 #define MAP_PRIVATE 0x002 /* Changes are private */
31 #define MAP_TYPE 0x00f /* Mask for type of mapping */
32 #define MAP_FIXED 0x010 /* Interpret addr exactly */
34 /* not used by linux, but here to make sure we don't clash with ABI defines */
35 #define MAP_RENAME 0x020 /* Assign page to file */
36 #define MAP_AUTOGROW 0x040 /* File may grow by writing */
37 #define MAP_LOCAL 0x080 /* Copy on fork/sproc */
38 #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */
40 /* These are linux-specific */
41 #define MAP_NORESERVE 0x0400 /* don't check for reservations */
42 #define MAP_ANONYMOUS 0x0800 /* don't use a file */
43 #define MAP_GROWSDOWN 0x1000 /* stack-like segment */
44 #define MAP_DENYWRITE 0x2000 /* ETXTBSY */
45 #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */
46 #define MAP_LOCKED 0x8000 /* pages are locked */
47 #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */
48 #define MAP_NONBLOCK 0x20000 /* do not block on IO */
53 #define MS_ASYNC 0x0001 /* sync memory asynchronously */
54 #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */
55 #define MS_SYNC 0x0004 /* synchronous memory sync */
60 #define MCL_CURRENT 1 /* lock all current mappings */
61 #define MCL_FUTURE 2 /* lock all future mappings */
63 #define MADV_NORMAL 0 /* no further special treatment */
64 #define MADV_RANDOM 1 /* expect random page references */
65 #define MADV_SEQUENTIAL 2 /* expect sequential page references */
66 #define MADV_WILLNEED 3 /* will need these pages */
67 #define MADV_DONTNEED 4 /* don't need these pages */
69 /* common parameters: try to keep these consistent across architectures */
70 #define MADV_REMOVE 9 /* remove these pages & resources */
71 #define MADV_DONTFORK 10 /* don't inherit across fork */
72 #define MADV_DOFORK 11 /* do inherit across fork */
74 /* compatibility flags */
77 #endif /* _ASM_MMAN_H */