arch/alpha/include/uapi/asm/mman.h

   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 #define MAP_SHARED      0x01            /* Share changes */
  14 #define MAP_PRIVATE     0x02            /* Changes are private */
  15 #define MAP_SHARED_VALIDATE 0x03        /* share + validate extension flags */
  16 #define MAP_TYPE        0x0f            /* Mask for type of mapping (OSF/1 is _wrong_) */
  17 #define MAP_FIXED       0x100           /* Interpret addr exactly */
  18 #define MAP_ANONYMOUS   0x10            /* don't use a file */
  19
  20 /* not used by linux, but here to make sure we don't clash with OSF/1 defines */
  21 #define _MAP_HASSEMAPHORE 0x0200
  22 #define _MAP_INHERIT    0x0400
  23 #define _MAP_UNALIGNED  0x0800
  24
  25 /* These are linux-specific */
  26 #define MAP_GROWSDOWN   0x01000         /* stack-like segment */
  27 #define MAP_DENYWRITE   0x02000         /* ETXTBSY */
  28 #define MAP_EXECUTABLE  0x04000         /* mark it as an executable */
  29 #define MAP_LOCKED      0x08000         /* lock the mapping */
  30 #define MAP_NORESERVE   0x10000         /* don't check for reservations */
  31 #define MAP_POPULATE    0x20000         /* populate (prefault) pagetables */
  32 #define MAP_NONBLOCK    0x40000         /* do not block on IO */
  33 #define MAP_STACK       0x80000         /* give out an address that is best suited for process/thread stacks */
  34 #define MAP_HUGETLB     0x100000        /* create a huge page mapping */
  35 #define MAP_FIXED_NOREPLACE     0x200000/* MAP_FIXED which doesn't unmap underlying mapping */
  36
  37 #define MS_ASYNC        1               /* sync memory asynchronously */
  38 #define MS_SYNC         2               /* synchronous memory sync */
  39 #define MS_INVALIDATE   4               /* invalidate the caches */
  40
  41 #define MCL_CURRENT      8192           /* lock all currently mapped pages */
  42 #define MCL_FUTURE      16384           /* lock all additions to address space */
  43 #define MCL_ONFAULT     32768           /* lock all pages that are faulted in */
  44
  45 #define MLOCK_ONFAULT   0x01            /* Lock pages in range after they are faulted in, do not prefault */
  46
  47 #define MADV_NORMAL     0               /* no further special treatment */
  48 #define MADV_RANDOM     1               /* expect random page references */
  49 #define MADV_SEQUENTIAL 2               /* expect sequential page references */
  50 #define MADV_WILLNEED   3               /* will need these pages */
  51 #define MADV_SPACEAVAIL 5               /* ensure resources are available */
  52 #define MADV_DONTNEED   6               /* don't need these pages */
  53
  54 /* common/generic parameters */
  55 #define MADV_FREE       8               /* free pages only if memory pressure */
  56 #define MADV_REMOVE     9               /* remove these pages & resources */
  57 #define MADV_DONTFORK   10              /* don't inherit across fork */
  58 #define MADV_DOFORK     11              /* do inherit across fork */
  59
  60 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  61 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
  62
  63 #define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
  64 #define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
  65
  66 #define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
  67                                            overrides the coredump filter bits */
  68 #define MADV_DODUMP     17              /* Clear the MADV_NODUMP flag */
  69
  70 #define MADV_WIPEONFORK 18              /* Zero memory on fork, child only */
  71 #define MADV_KEEPONFORK 19              /* Undo MADV_WIPEONFORK */
  72
  73 /* compatibility flags */
  74 #define MAP_FILE        0
  75
  76 #define PKEY_DISABLE_ACCESS     0x1
  77 #define PKEY_DISABLE_WRITE      0x2
  78 #define PKEY_ACCESS_MASK        (PKEY_DISABLE_ACCESS |\
  79                                  PKEY_DISABLE_WRITE)
  80
  81 #endif /* __ALPHA_MMAN_H__ */