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1 #ifndef __ALPHA_MMAN_H__
2 #define __ALPHA_MMAN_H__
3 
4 #define PROT_READ	0x1		/* page can be read */
5 #define PROT_WRITE	0x2		/* page can be written */
6 #define PROT_EXEC	0x4		/* page can be executed */
7 #define PROT_SEM	0x8		/* page may be used for atomic ops */
8 #define PROT_NONE	0x0		/* page can not be accessed */
9 #define PROT_GROWSDOWN	0x01000000	/* mprotect flag: extend change to start of growsdown vma */
10 #define PROT_GROWSUP	0x02000000	/* mprotect flag: extend change to end of growsup vma */
11 
12 #define MAP_SHARED	0x01		/* Share changes */
13 #define MAP_PRIVATE	0x02		/* Changes are private */
14 #define MAP_TYPE	0x0f		/* Mask for type of mapping (OSF/1 is _wrong_) */
15 #define MAP_FIXED	0x100		/* Interpret addr exactly */
16 #define MAP_ANONYMOUS	0x10		/* don't use a file */
17 
18 /* not used by linux, but here to make sure we don't clash with OSF/1 defines */
19 #define _MAP_HASSEMAPHORE 0x0200
20 #define _MAP_INHERIT	0x0400
21 #define _MAP_UNALIGNED	0x0800
22 
23 /* These are linux-specific */
24 #define MAP_GROWSDOWN	0x01000		/* stack-like segment */
25 #define MAP_DENYWRITE	0x02000		/* ETXTBSY */
26 #define MAP_EXECUTABLE	0x04000		/* mark it as an executable */
27 #define MAP_LOCKED	0x08000		/* lock the mapping */
28 #define MAP_NORESERVE	0x10000		/* don't check for reservations */
29 #define MAP_POPULATE	0x20000		/* populate (prefault) pagetables */
30 #define MAP_NONBLOCK	0x40000		/* do not block on IO */
31 #define MAP_STACK	0x80000		/* give out an address that is best suited for process/thread stacks */
32 #define MAP_HUGETLB	0x100000	/* create a huge page mapping */
33 
34 #define MS_ASYNC	1		/* sync memory asynchronously */
35 #define MS_SYNC		2		/* synchronous memory sync */
36 #define MS_INVALIDATE	4		/* invalidate the caches */
37 
38 #define MCL_CURRENT	 8192		/* lock all currently mapped pages */
39 #define MCL_FUTURE	16384		/* lock all additions to address space */
40 #define MCL_ONFAULT	32768		/* lock all pages that are faulted in */
41 
42 #define MLOCK_ONFAULT	0x01		/* Lock pages in range after they are faulted in, do not prefault */
43 
44 #define MADV_NORMAL	0		/* no further special treatment */
45 #define MADV_RANDOM	1		/* expect random page references */
46 #define MADV_SEQUENTIAL	2		/* expect sequential page references */
47 #define MADV_WILLNEED	3		/* will need these pages */
48 #define	MADV_SPACEAVAIL	5		/* ensure resources are available */
49 #define MADV_DONTNEED	6		/* don't need these pages */
50 
51 /* common/generic parameters */
52 #define MADV_REMOVE	9		/* remove these pages & resources */
53 #define MADV_DONTFORK	10		/* don't inherit across fork */
54 #define MADV_DOFORK	11		/* do inherit across fork */
55 
56 #define MADV_MERGEABLE   12		/* KSM may merge identical pages */
57 #define MADV_UNMERGEABLE 13		/* KSM may not merge identical pages */
58 
59 #define MADV_HUGEPAGE	14		/* Worth backing with hugepages */
60 #define MADV_NOHUGEPAGE	15		/* Not worth backing with hugepages */
61 
62 #define MADV_DONTDUMP   16		/* Explicity exclude from the core dump,
63 					   overrides the coredump filter bits */
64 #define MADV_DODUMP	17		/* Clear the MADV_NODUMP flag */
65 
66 /* compatibility flags */
67 #define MAP_FILE	0
68 
69 /*
70  * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
71  * This gives us 6 bits, which is enough until someone invents 128 bit address
72  * spaces.
73  *
74  * Assume these are all power of twos.
75  * When 0 use the default page size.
76  */
77 #define MAP_HUGE_SHIFT	26
78 #define MAP_HUGE_MASK	0x3f
79 
80 #endif /* __ALPHA_MMAN_H__ */
81