sysdeps/unix/sysv/linux/powerpc/bits/mman.h

   1 /* Definitions for POSIX memory map interface.  Linux/PowerPC version.
   2    Copyright (C) 1997,2000,2003,2005,2006,2008 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _SYS_MMAN_H
  21 # error "Never use <bits/mman.h> directly; iclude <sys/mman.h> instead."
  22 #endif
  23
  24 /* The following definitions basically come from the kernel headers.
  25    But the kernel header is not namespace clean.  */
  26
  27
  28 /* Protections are chosen from these bits, OR'd together.  The
  29    implementation does not necessarily support PROT_EXEC or PROT_WRITE
  30    without PROT_READ.  The only guarantees are that no writing will be
  31    allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
  32
  33 #define PROT_READ       0x1             /* Page can be read.  */
  34 #define PROT_WRITE      0x2             /* Page can be written.  */
  35 #define PROT_EXEC       0x4             /* Page can be executed.  */
  36 #define PROT_NONE       0x0             /* Page can not be accessed.  */
  37 #define PROT_SAO        0x10            /* Strong Access Ordering.  */
  38 #define PROT_GROWSDOWN  0x01000000      /* Extend change to start of
  39                                            growsdown vma (mprotect only).  */
  40 #define PROT_GROWSUP    0x02000000      /* Extend change to start of
  41                                            growsup vma (mprotect only).  */
  42
  43 /* Sharing types (must choose one and only one of these).  */
  44 #define MAP_SHARED      0x001           /* Share changes.  */
  45 #define MAP_PRIVATE     0x002           /* Changes are private.  */
  46 #ifdef __USE_MISC
  47 # define MAP_TYPE       0x00f           /* Mask for type of mapping.  */
  48 #endif
  49
  50 /* Other flags.  */
  51 #define MAP_FIXED       0x010           /* Interpret addr exactly.  */
  52 #ifdef __USE_MISC
  53 # define MAP_FILE       0x000
  54 # define MAP_ANONYMOUS  0x020           /* Don't use a file.  */
  55 # define MAP_ANON       MAP_ANONYMOUS
  56 #endif
  57
  58 /* These are Linux-specific.  */
  59 #ifdef __USE_MISC
  60 # define MAP_GROWSDOWN  0x00100         /* Stack-like segment.  */
  61 # define MAP_DENYWRITE  0x00800         /* ETXTBSY */
  62 # define MAP_EXECUTABLE 0x01000         /* Mark it as an executable.  */
  63 # define MAP_LOCKED     0x00080         /* Lock the mapping.  */
  64 # define MAP_NORESERVE  0x00040         /* Don't check for reservations.  */
  65 # define MAP_POPULATE   0x08000         /* Populate (prefault) pagetables.  */
  66 # define MAP_NONBLOCK   0x10000         /* Do not block on IO.  */
  67 #endif
  68
  69 /* Flags to `msync'.  */
  70 #define MS_ASYNC        1               /* Sync memory asynchronously.  */
  71 #define MS_SYNC         4               /* Synchronous memory sync.  */
  72 #define MS_INVALIDATE   2               /* Invalidate the caches.  */
  73
  74 /* Flags for `mlockall'.  */
  75 #define MCL_CURRENT     0x2000          /* Lock all currently mapped pages.  */
  76 #define MCL_FUTURE      0x4000          /* Lock all additions to address
  77                                            space.  */
  78
  79
  80 /* Flags for `mremap'.  */
  81 #ifdef __USE_GNU
  82 # define MREMAP_MAYMOVE 1
  83 # define MREMAP_FIXED   2
  84 #endif
  85
  86 /* Advice to `madvise'.  */
  87 #ifdef __USE_BSD
  88 # define MADV_NORMAL     0      /* No further special treatment.  */
  89 # define MADV_RANDOM     1      /* Expect random page references.  */
  90 # define MADV_SEQUENTIAL 2      /* Expect sequential page references.  */
  91 # define MADV_WILLNEED   3      /* Will need these pages.  */
  92 # define MADV_DONTNEED   4      /* Don't need these pages.  */
  93 # define MADV_REMOVE     9      /* Remove these pages and resources.  */
  94 # define MADV_DONTFORK   10     /* Do not inherit across fork.  */
  95 # define MADV_DOFORK     11     /* Do inherit across fork.  */
  96 #endif
  97
  98 /* The POSIX people had to invent similar names for the same things.  */
  99 #ifdef __USE_XOPEN2K
 100 # define POSIX_MADV_NORMAL      0 /* No further special treatment.  */
 101 # define POSIX_MADV_RANDOM      1 /* Expect random page references.  */
 102 # define POSIX_MADV_SEQUENTIAL  2 /* Expect sequential page references.  */
 103 # define POSIX_MADV_WILLNEED    3 /* Will need these pages.  */
 104 # define POSIX_MADV_DONTNEED    4 /* Don't need these pages.  */
 105 #endif