1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_MMAN_H
3 #define _LINUX_MMAN_H
4 
5 #include <asm/mman.h>
6 #include <asm-generic/hugetlb_encode.h>
7 
8 #define MREMAP_MAYMOVE		1
9 #define MREMAP_FIXED		2
10 #define MREMAP_DONTUNMAP	4
11 
12 #define OVERCOMMIT_GUESS		0
13 #define OVERCOMMIT_ALWAYS		1
14 #define OVERCOMMIT_NEVER		2
15 
16 #define MAP_SHARED	0x01		/* Share changes */
17 #define MAP_PRIVATE	0x02		/* Changes are private */
18 #define MAP_SHARED_VALIDATE 0x03	/* share + validate extension flags */
19 
20 /*
21  * Huge page size encoding when MAP_HUGETLB is specified, and a huge page
22  * size other than the default is desired.  See hugetlb_encode.h.
23  * All known huge page size encodings are provided here.  It is the
24  * responsibility of the application to know which sizes are supported on
25  * the running system.  See mmap(2) man page for details.
26  */
27 #define MAP_HUGE_SHIFT	HUGETLB_FLAG_ENCODE_SHIFT
28 #define MAP_HUGE_MASK	HUGETLB_FLAG_ENCODE_MASK
29 
30 #define MAP_HUGE_64KB	HUGETLB_FLAG_ENCODE_64KB
31 #define MAP_HUGE_512KB	HUGETLB_FLAG_ENCODE_512KB
32 #define MAP_HUGE_1MB	HUGETLB_FLAG_ENCODE_1MB
33 #define MAP_HUGE_2MB	HUGETLB_FLAG_ENCODE_2MB
34 #define MAP_HUGE_8MB	HUGETLB_FLAG_ENCODE_8MB
35 #define MAP_HUGE_16MB	HUGETLB_FLAG_ENCODE_16MB
36 #define MAP_HUGE_32MB	HUGETLB_FLAG_ENCODE_32MB
37 #define MAP_HUGE_256MB	HUGETLB_FLAG_ENCODE_256MB
38 #define MAP_HUGE_512MB	HUGETLB_FLAG_ENCODE_512MB
39 #define MAP_HUGE_1GB	HUGETLB_FLAG_ENCODE_1GB
40 #define MAP_HUGE_2GB	HUGETLB_FLAG_ENCODE_2GB
41 #define MAP_HUGE_16GB	HUGETLB_FLAG_ENCODE_16GB
42 
43 #endif /* _LINUX_MMAN_H */
44