linux/include/asm-generic/mman-common.h
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   1#ifndef __ASM_GENERIC_MMAN_COMMON_H
   2#define __ASM_GENERIC_MMAN_COMMON_H
   3
   4/*
   5 Author: Michael S. Tsirkin <mst@mellanox.co.il>, Mellanox Technologies Ltd.
   6 Based on: asm-xxx/mman.h
   7*/
   8
   9#define PROT_READ       0x1             /* page can be read */
  10#define PROT_WRITE      0x2             /* page can be written */
  11#define PROT_EXEC       0x4             /* page can be executed */
  12#define PROT_SEM        0x8             /* page may be used for atomic ops */
  13#define PROT_NONE       0x0             /* page can not be accessed */
  14#define PROT_GROWSDOWN  0x01000000      /* mprotect flag: extend change to start of growsdown vma */
  15#define PROT_GROWSUP    0x02000000      /* mprotect flag: extend change to end of growsup vma */
  16
  17#define MAP_SHARED      0x01            /* Share changes */
  18#define MAP_PRIVATE     0x02            /* Changes are private */
  19#define MAP_TYPE        0x0f            /* Mask for type of mapping */
  20#define MAP_FIXED       0x10            /* Interpret addr exactly */
  21#define MAP_ANONYMOUS   0x20            /* don't use a file */
  22#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
  23# define MAP_UNINITIALIZED 0x4000000    /* For anonymous mmap, memory could be uninitialized */
  24#else
  25# define MAP_UNINITIALIZED 0x0          /* Don't support this flag */
  26#endif
  27
  28#define MS_ASYNC        1               /* sync memory asynchronously */
  29#define MS_INVALIDATE   2               /* invalidate the caches */
  30#define MS_SYNC         4               /* synchronous memory sync */
  31
  32#define MADV_NORMAL     0               /* no further special treatment */
  33#define MADV_RANDOM     1               /* expect random page references */
  34#define MADV_SEQUENTIAL 2               /* expect sequential page references */
  35#define MADV_WILLNEED   3               /* will need these pages */
  36#define MADV_DONTNEED   4               /* don't need these pages */
  37
  38/* common parameters: try to keep these consistent across architectures */
  39#define MADV_REMOVE     9               /* remove these pages & resources */
  40#define MADV_DONTFORK   10              /* don't inherit across fork */
  41#define MADV_DOFORK     11              /* do inherit across fork */
  42#define MADV_HWPOISON   100             /* poison a page for testing */
  43#define MADV_SOFT_OFFLINE 101           /* soft offline page for testing */
  44
  45#define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  46#define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
  47
  48#define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
  49#define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
  50
  51#define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
  52                                           overrides the coredump filter bits */
  53#define MADV_DODUMP     17              /* Clear the MADV_NODUMP flag */
  54
  55/* compatibility flags */
  56#define MAP_FILE        0
  57
  58#endif /* __ASM_GENERIC_MMAN_COMMON_H */
  59
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