Move all files into ports/ subdirectory in preparation for merge with glibc
[glibc.git] / ports / sysdeps / unix / sysv / linux / arm / bits / mman.h
blob09b9c4561fd750e98ec8dda379cd7512d3e47cb8
1 /* Definitions for POSIX memory map interface. Linux/ARM version.
2 Copyright (C) 1997-2012 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
19 #ifndef _SYS_MMAN_H
20 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
21 #endif
23 /* The following definitions basically come from the kernel headers.
24 But the kernel header is not namespace clean. */
27 /* Protections are chosen from these bits, OR'd together. The
28 implementation does not necessarily support PROT_EXEC or PROT_WRITE
29 without PROT_READ. The only guarantees are that no writing will be
30 allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
32 #define PROT_READ 0x1 /* Page can be read. */
33 #define PROT_WRITE 0x2 /* Page can be written. */
34 #define PROT_EXEC 0x4 /* Page can be executed. */
35 #define PROT_NONE 0x0 /* Page can not be accessed. */
36 #define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
37 growsdown vma (mprotect only). */
38 #define PROT_GROWSUP 0x02000000 /* Extend change to start of
39 growsup vma (mprotect only). */
41 /* Sharing types (must choose one and only one of these). */
42 #define MAP_SHARED 0x01 /* Share changes. */
43 #define MAP_PRIVATE 0x02 /* Changes are private. */
44 #ifdef __USE_MISC
45 # define MAP_TYPE 0x0f /* Mask for type of mapping. */
46 #endif
48 /* Other flags. */
49 #define MAP_FIXED 0x10 /* Interpret addr exactly. */
50 #ifdef __USE_MISC
51 # define MAP_FILE 0
52 # define MAP_ANONYMOUS 0x20 /* Don't use a file. */
53 # define MAP_ANON MAP_ANONYMOUS
54 #endif
56 /* These are Linux-specific. */
57 #ifdef __USE_MISC
58 # define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
59 # define MAP_DENYWRITE 0x00800 /* ETXTBSY */
60 # define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */
61 # define MAP_LOCKED 0x02000 /* Lock the mapping. */
62 # define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
63 # define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
64 # define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
65 # define MAP_STACK 0x20000 /* Allocation is for a stack. */
66 # define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
67 #endif
69 /* Flags to `msync'. */
70 #define MS_ASYNC 1 /* Sync memory asynchronously. */
71 #define MS_SYNC 4 /* Synchronous memory sync. */
72 #define MS_INVALIDATE 2 /* Invalidate the caches. */
74 /* Flags for `mlockall'. */
75 #define MCL_CURRENT 1 /* Lock all currently mapped pages. */
76 #define MCL_FUTURE 2 /* Lock all additions to address
77 space. */
79 /* Flags for `mremap'. */
80 #ifdef __USE_GNU
81 # define MREMAP_MAYMOVE 1
82 # define MREMAP_FIXED 2
83 #endif
85 /* Advice to `madvise'. */
86 #ifdef __USE_BSD
87 # define MADV_NORMAL 0 /* No further special treatment. */
88 # define MADV_RANDOM 1 /* Expect random page references. */
89 # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */
90 # define MADV_WILLNEED 3 /* Will need these pages. */
91 # define MADV_DONTNEED 4 /* Don't need these pages. */
92 # define MADV_REMOVE 9 /* Remove these pages and resources. */
93 # define MADV_DONTFORK 10 /* Do not inherit across fork. */
94 # define MADV_DOFORK 11 /* Do inherit across fork. */
95 # define MADV_MERGEABLE 12 /* KSM may merge identical pages. */
96 # define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages. */
97 # define MADV_HUGEPAGE 14 /* Worth backing with hugepages. */
98 # define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages. */
99 # define MADV_DONTDUMP 16 /* Explicity exclude from the core dump,
100 overrides the coredump filter bits. */
101 # define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag. */
102 # define MADV_HWPOISON 100 /* Poison a page for testing. */
103 #endif
105 /* The POSIX people had to invent similar names for the same things. */
106 #ifdef __USE_XOPEN2K
107 # define POSIX_MADV_NORMAL 0 /* No further special treatment. */
108 # define POSIX_MADV_RANDOM 1 /* Expect random page references. */
109 # define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
110 # define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
111 # define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
112 #endif