ports/sysdeps/unix/sysv/linux/hppa/bits/mman.h

   1 /* Definitions for POSIX memory map interface.  Linux/HPPA version.
   2    Copyright (C) 1997-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SYS_MMAN_H
  20 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
  21 #endif
  22
  23 /* These are taken from the kernel definitions.  */
  24
  25 #define PROT_READ       0x1             /* Page can be read */
  26 #define PROT_WRITE      0x2             /* Page can be written */
  27 #define PROT_EXEC       0x4             /* Page can be executed */
  28 #define PROT_NONE       0x0             /* Page can not be accessed */
  29 #define PROT_GROWSDOWN  0x01000000      /* Extend change to start of
  30                                            growsdown vma (mprotect only).  */
  31 #define PROT_GROWSUP    0x02000000      /* Extend change to start of
  32                                            growsup vma (mprotect only).  */
  33
  34 #define MAP_SHARED      0x01            /* Share changes */
  35 #define MAP_PRIVATE     0x02            /* Changes are private */
  36 #ifdef __USE_MISC
  37 # define MAP_TYPE       0x03            /* Mask for type of mapping */
  38 #endif
  39
  40 /* Other flags.  */
  41 #define MAP_FIXED       0x04            /* Interpret addr exactly */
  42 #ifdef __USE_MISC
  43 # define MAP_FILE       0x0
  44 # define MAP_ANONYMOUS  0x10            /* Don't use a file */
  45 # define MAP_ANON       MAP_ANONYMOUS
  46 # define MAP_VARIABLE   0
  47 /* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.  */
  48 # define MAP_HUGE_SHIFT 26
  49 # define MAP_HUGE_MASK  0x3f
  50 #endif
  51
  52 /* These are Linux-specific.  */
  53 #ifdef __USE_MISC
  54 # define MAP_DENYWRITE  0x0800          /* ETXTBSY */
  55 # define MAP_EXECUTABLE 0x1000          /* Mark it as an executable */
  56 # define MAP_LOCKED     0x2000          /* Pages are locked */
  57 # define MAP_NORESERVE  0x4000          /* Don't check for reservations */
  58 # define MAP_GROWSDOWN  0x8000          /* Stack-like segment */
  59 # define MAP_POPULATE   0x10000         /* Populate (prefault) pagetables */
  60 # define MAP_NONBLOCK   0x20000         /* Do not block on IO */
  61 #endif
  62
  63 /* Flags to "msync"  */
  64 #define MS_SYNC         1               /* Synchronous memory sync */
  65 #define MS_ASYNC        2               /* Sync memory asynchronously */
  66 #define MS_INVALIDATE   4               /* Invalidate the caches */
  67
  68 /* Flags to "mlockall"  */
  69 #define MCL_CURRENT     1               /* Lock all current mappings */
  70 #define MCL_FUTURE      2               /* Lock all future mappings */
  71
  72 /* Flags for `mremap'.  */
  73 #ifdef __USE_GNU
  74 # define MREMAP_MAYMOVE 1
  75 # define MREMAP_FIXED   2
  76 #endif
  77
  78 /* Advice to "madvise"  */
  79 #ifdef __USE_BSD
  80 # define MADV_NORMAL      0     /* No further special treatment */
  81 # define MADV_RANDOM      1     /* Expect random page references */
  82 # define MADV_SEQUENTIAL  2     /* Expect sequential page references */
  83 # define MADV_WILLNEED    3     /* Will need these pages */
  84 # define MADV_DONTNEED    4     /* Dont need these pages */
  85 # define MADV_SPACEAVAIL  5     /* Insure that resources are reserved */
  86 # define MADV_VPS_PURGE   6     /* Purge pages from VM page cache */
  87 # define MADV_VPS_INHERIT 7     /* Inherit parents page size */
  88 # define MADV_REMOVE      9     /* Remove these pages and resources.  */
  89 # define MADV_DONTFORK   10     /* Do not inherit across fork.  */
  90 # define MADV_DOFORK     11     /* Do inherit across fork.  */
  91 # define MADV_MERGEABLE   65    /* KSM may merge identical pages */
  92 # define MADV_UNMERGEABLE 66    /* KSM may not merge identical pages */
  93 #endif
  94
  95 /* The range 12-64 is reserved for page size specification. */
  96 #define MADV_4K_PAGES   12              /* Use 4K pages  */
  97 #define MADV_16K_PAGES  14              /* Use 16K pages */
  98 #define MADV_64K_PAGES  16              /* Use 64K pages */
  99 #define MADV_256K_PAGES 18              /* Use 256K pages */
 100 #define MADV_1M_PAGES   20              /* Use 1 Megabyte pages */
 101 #define MADV_4M_PAGES   22              /* Use 4 Megabyte pages */
 102 #define MADV_16M_PAGES  24              /* Use 16 Megabyte pages */
 103 #define MADV_64M_PAGES  26              /* Use 64 Megabyte pages */
 104
 105 /* The POSIX people had to invent similar names for the same things.  */
 106 #ifdef __USE_XOPEN2K
 107 # define POSIX_MADV_NORMAL      0 /* No further special treatment.  */
 108 # define POSIX_MADV_RANDOM      1 /* Expect random page references.  */
 109 # define POSIX_MADV_SEQUENTIAL  2 /* Expect sequential page references.  */
 110 # define POSIX_MADV_WILLNEED    3 /* Will need these pages.  */
 111 # define POSIX_MADV_DONTNEED    4 /* Don't need these pages.  */
 112 #endif