1/*
 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 */
56#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 */
58
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
72#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 */
82
83#define MADV_MERGEABLE   12		/* KSM may merge identical pages */
84#define MADV_UNMERGEABLE 13		/* KSM may not merge identical pages */
85
86#define MADV_HUGEPAGE	14		/* Worth backing with hugepages */
87#define MADV_NOHUGEPAGE	15		/* Not worth backing with hugepages */
88
89/* compatibility flags */
90#define MAP_FILE	0
91
92#endif /* _XTENSA_MMAN_H */