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Chris Zankel9a8fd552005-06-23 22:01:26 -07001/*
2 * include/asm-xtensa/mman.h
3 *
4 * Xtensa Processor memory-manager definitions
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 *
10 * Copyright (C) 1995 by Ralf Baechle
11 * Copyright (C) 2001 - 2005 Tensilica Inc.
12 */
13
14#ifndef _XTENSA_MMAN_H
15#define _XTENSA_MMAN_H
16
17/*
18 * Protections are chosen from these bits, OR'd together. The
19 * implementation does not necessarily support PROT_EXEC or PROT_WRITE
20 * without PROT_READ. The only guarantees are that no writing will be
21 * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
22 */
23
24#define PROT_NONE 0x0 /* page can not be accessed */
25#define PROT_READ 0x1 /* page can be read */
26#define PROT_WRITE 0x2 /* page can be written */
27#define PROT_EXEC 0x4 /* page can be executed */
28
29#define PROT_SEM 0x10 /* page may be used for atomic ops */
30#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */
31#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end fo growsup vma */
32
33/*
34 * Flags for mmap
35 */
36#define MAP_SHARED 0x001 /* Share changes */
37#define MAP_PRIVATE 0x002 /* Changes are private */
38#define MAP_TYPE 0x00f /* Mask for type of mapping */
39#define MAP_FIXED 0x010 /* Interpret addr exactly */
40
41/* not used by linux, but here to make sure we don't clash with ABI defines */
42#define MAP_RENAME 0x020 /* Assign page to file */
43#define MAP_AUTOGROW 0x040 /* File may grow by writing */
44#define MAP_LOCAL 0x080 /* Copy on fork/sproc */
45#define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */
46
47/* These are linux-specific */
48#define MAP_NORESERVE 0x0400 /* don't check for reservations */
49#define MAP_ANONYMOUS 0x0800 /* don't use a file */
50#define MAP_GROWSDOWN 0x1000 /* stack-like segment */
51#define MAP_DENYWRITE 0x2000 /* ETXTBSY */
52#define MAP_EXECUTABLE 0x4000 /* mark it as an executable */
53#define MAP_LOCKED 0x8000 /* pages are locked */
54#define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */
55#define MAP_NONBLOCK 0x20000 /* do not block on IO */
Arnd Bergmann90f72aa2009-09-21 17:03:45 -070056#define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */
57#define MAP_HUGETLB 0x80000 /* create a huge page mapping */
Chris Zankel9a8fd552005-06-23 22:01:26 -070058
59/*
60 * Flags for msync
61 */
62#define MS_ASYNC 0x0001 /* sync memory asynchronously */
63#define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */
64#define MS_SYNC 0x0004 /* synchronous memory sync */
65
66/*
67 * Flags for mlockall
68 */
69#define MCL_CURRENT 1 /* lock all current mappings */
70#define MCL_FUTURE 2 /* lock all future mappings */
71
Michael S. Tsirkin5f6164f2006-02-15 15:17:39 -080072#define MADV_NORMAL 0 /* no further special treatment */
73#define MADV_RANDOM 1 /* expect random page references */
74#define MADV_SEQUENTIAL 2 /* expect sequential page references */
75#define MADV_WILLNEED 3 /* will need these pages */
76#define MADV_DONTNEED 4 /* don't need these pages */
77
78/* common parameters: try to keep these consistent across architectures */
79#define MADV_REMOVE 9 /* remove these pages & resources */
80#define MADV_DONTFORK 10 /* don't inherit across fork */
81#define MADV_DOFORK 11 /* do inherit across fork */
Chris Zankel9a8fd552005-06-23 22:01:26 -070082
Hugh Dickinsd19f3522009-09-21 17:01:53 -070083#define MADV_MERGEABLE 12 /* KSM may merge identical pages */
84#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
85
Andrea Arcangelia826e422011-01-13 15:46:31 -080086#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */
Andrea Arcangeli1ddd6db2011-01-13 15:47:17 -080087#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */
Andrea Arcangelia826e422011-01-13 15:46:31 -080088
Chris Zankel9a8fd552005-06-23 22:01:26 -070089/* compatibility flags */
Michael S. Tsirkin5f6164f2006-02-15 15:17:39 -080090#define MAP_FILE 0
Chris Zankel9a8fd552005-06-23 22:01:26 -070091
92#endif /* _XTENSA_MMAN_H */