linux/arch/alpha/include/uapi/asm/mman.h
<<
>>
Prefs
   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef __ALPHA_MMAN_H__
   3#define __ALPHA_MMAN_H__
   4
   5#define PROT_READ       0x1             /* page can be read */
   6#define PROT_WRITE      0x2             /* page can be written */
   7#define PROT_EXEC       0x4             /* page can be executed */
   8#define PROT_SEM        0x8             /* page may be used for atomic ops */
   9#define PROT_NONE       0x0             /* page can not be accessed */
  10#define PROT_GROWSDOWN  0x01000000      /* mprotect flag: extend change to start of growsdown vma */
  11#define PROT_GROWSUP    0x02000000      /* mprotect flag: extend change to end of growsup vma */
  12
  13/* 0x01 - 0x03 are defined in linux/mman.h */
  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#define MAP_FIXED_NOREPLACE     0x200000/* MAP_FIXED which doesn't unmap underlying mapping */
  34
  35#define MS_ASYNC        1               /* sync memory asynchronously */
  36#define MS_SYNC         2               /* synchronous memory sync */
  37#define MS_INVALIDATE   4               /* invalidate the caches */
  38
  39#define MCL_CURRENT      8192           /* lock all currently mapped pages */
  40#define MCL_FUTURE      16384           /* lock all additions to address space */
  41#define MCL_ONFAULT     32768           /* lock all pages that are faulted in */
  42
  43#define MLOCK_ONFAULT   0x01            /* Lock pages in range after they are faulted in, do not prefault */
  44
  45#define MADV_NORMAL     0               /* no further special treatment */
  46#define MADV_RANDOM     1               /* expect random page references */
  47#define MADV_SEQUENTIAL 2               /* expect sequential page references */
  48#define MADV_WILLNEED   3               /* will need these pages */
  49#define MADV_SPACEAVAIL 5               /* ensure resources are available */
  50#define MADV_DONTNEED   6               /* don't need these pages */
  51
  52/* common/generic parameters */
  53#define MADV_FREE       8               /* free pages only if memory pressure */
  54#define MADV_REMOVE     9               /* remove these pages & resources */
  55#define MADV_DONTFORK   10              /* don't inherit across fork */
  56#define MADV_DOFORK     11              /* do inherit across fork */
  57
  58#define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  59#define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
  60
  61#define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
  62#define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
  63
  64#define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
  65                                           overrides the coredump filter bits */
  66#define MADV_DODUMP     17              /* Clear the MADV_NODUMP flag */
  67
  68#define MADV_WIPEONFORK 18              /* Zero memory on fork, child only */
  69#define MADV_KEEPONFORK 19              /* Undo MADV_WIPEONFORK */
  70
  71#define MADV_COLD       20              /* deactivate these pages */
  72#define MADV_PAGEOUT    21              /* reclaim these pages */
  73
  74/* compatibility flags */
  75#define MAP_FILE        0
  76
  77#define PKEY_DISABLE_ACCESS     0x1
  78#define PKEY_DISABLE_WRITE      0x2
  79#define PKEY_ACCESS_MASK        (PKEY_DISABLE_ACCESS |\
  80                                 PKEY_DISABLE_WRITE)
  81
  82#endif /* __ALPHA_MMAN_H__ */
  83