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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * include/asm-xtensa/mman.h
4 *
5 * Xtensa Processor memory-manager definitions
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
9 * for more details.
10 *
11 * Copyright (C) 1995 by Ralf Baechle
12 * Copyright (C) 2001 - 2005 Tensilica Inc.
13 */
14
15#ifndef _XTENSA_MMAN_H
16#define _XTENSA_MMAN_H
17
18/*
19 * Protections are chosen from these bits, OR'd together. The
20 * implementation does not necessarily support PROT_EXEC or PROT_WRITE
21 * without PROT_READ. The only guarantees are that no writing will be
22 * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
23 */
24
25#define PROT_NONE 0x0 /* page can not be accessed */
26#define PROT_READ 0x1 /* page can be read */
27#define PROT_WRITE 0x2 /* page can be written */
28#define PROT_EXEC 0x4 /* page can be executed */
29
30#define PROT_SEM 0x10 /* page may be used for atomic ops */
31#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */
32#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end fo growsup vma */
33
34/*
35 * Flags for mmap
36 */
37/* 0x01 - 0x03 are defined in linux/mman.h */
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#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */
59#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be
60 * uninitialized */
61
62/*
63 * Flags for msync
64 */
65#define MS_ASYNC 0x0001 /* sync memory asynchronously */
66#define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */
67#define MS_SYNC 0x0004 /* synchronous memory sync */
68
69/*
70 * Flags for mlockall
71 */
72#define MCL_CURRENT 1 /* lock all current mappings */
73#define MCL_FUTURE 2 /* lock all future mappings */
74#define MCL_ONFAULT 4 /* lock all pages that are faulted in */
75
76/*
77 * Flags for mlock
78 */
79#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */
80
81#define MADV_NORMAL 0 /* no further special treatment */
82#define MADV_RANDOM 1 /* expect random page references */
83#define MADV_SEQUENTIAL 2 /* expect sequential page references */
84#define MADV_WILLNEED 3 /* will need these pages */
85#define MADV_DONTNEED 4 /* don't need these pages */
86
87/* common parameters: try to keep these consistent across architectures */
88#define MADV_FREE 8 /* free pages only if memory pressure */
89#define MADV_REMOVE 9 /* remove these pages & resources */
90#define MADV_DONTFORK 10 /* don't inherit across fork */
91#define MADV_DOFORK 11 /* do inherit across fork */
92
93#define MADV_MERGEABLE 12 /* KSM may merge identical pages */
94#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
95
96#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */
97#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */
98
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_NODUMP flag */
102
103#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */
104#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */
105
106#define MADV_COLD 20 /* deactivate these pages */
107#define MADV_PAGEOUT 21 /* reclaim these pages */
108
109#define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */
110#define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */
111
112#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */
113
114#define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */
115
116#define MADV_GUARD_INSTALL 102 /* fatal signal on access to range */
117#define MADV_GUARD_REMOVE 103 /* unguard range */
118
119/* compatibility flags */
120#define MAP_FILE 0
121
122#define PKEY_DISABLE_ACCESS 0x1
123#define PKEY_DISABLE_WRITE 0x2
124#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
125 PKEY_DISABLE_WRITE)
126
127#endif /* _XTENSA_MMAN_H */