mman-common.h

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#ifndef __ASM_GENERIC_MMAN_COMMON_H
#define __ASM_GENERIC_MMAN_COMMON_H

/*
 Author: Michael S. Tsirkin <[email protected]>, Mellanox Technologies Ltd.
 Based on: asm-xxx/mman.h
*/

#define PROT_READ   0x1     /* page can be read */
#define PROT_WRITE  0x2     /* page can be written */
#define PROT_EXEC   0x4     /* page can be executed */
#define PROT_SEM    0x8     /* page may be used for atomic ops */
#define PROT_NONE   0x0     /* page can not be accessed */
#define PROT_GROWSDOWN  0x01000000  /* mprotect flag: extend change to start of growsdown vma */
#define PROT_GROWSUP    0x02000000  /* mprotect flag: extend change to end of growsup vma */

#define MAP_SHARED  0x01        /* Share changes */
#define MAP_PRIVATE 0x02        /* Changes are private */
#define MAP_TYPE    0x0f        /* Mask for type of mapping */
#define MAP_FIXED   0x10        /* Interpret addr exactly */
#define MAP_ANONYMOUS   0x20        /* don't use a file */
#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
# define MAP_UNINITIALIZED 0x4000000    /* For anonymous mmap, memory could be uninitialized */
#else
# define MAP_UNINITIALIZED 0x0      /* Don't support this flag */
#endif

#define MS_ASYNC    1       /* sync memory asynchronously */
#define MS_INVALIDATE   2       /* invalidate the caches */
#define MS_SYNC     4       /* synchronous memory sync */

#define MADV_NORMAL 0       /* no further special treatment */
#define MADV_RANDOM 1       /* expect random page references */
#define MADV_SEQUENTIAL 2       /* expect sequential page references */
#define MADV_WILLNEED   3       /* will need these pages */
#define MADV_DONTNEED   4       /* don't need these pages */

/* common parameters: try to keep these consistent across architectures */
#define MADV_REMOVE 9       /* remove these pages & resources */
#define MADV_DONTFORK   10      /* don't inherit across fork */
#define MADV_DOFORK 11      /* do inherit across fork */
#define MADV_HWPOISON   100     /* poison a page for testing */
#define MADV_SOFT_OFFLINE 101       /* soft offline page for testing */

#define MADV_MERGEABLE   12     /* KSM may merge identical pages */
#define MADV_UNMERGEABLE 13     /* KSM may not merge identical pages */

#define MADV_HUGEPAGE   14      /* Worth backing with hugepages */
#define MADV_NOHUGEPAGE 15      /* Not worth backing with hugepages */

#define MADV_DONTDUMP   16      /* Explicity exclude from the core dump,
                       overrides the coredump filter bits */
#define MADV_DODUMP 17      /* Clear the MADV_NODUMP flag */

/* compatibility flags */
#define MAP_FILE    0

#endif /* __ASM_GENERIC_MMAN_COMMON_H */