include/asm-mips/mman.h

   1 /*
   2  * Linux/MIPS memory manager definitions
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 1995 by Ralf Baechle
   9  */
  10 #ifndef __ASM_MIPS_MMAN_H
  11 #define __ASM_MIPS_MMAN_H
  12
  13 /*
  14  * Protections are chosen from these bits, OR'd together.  The
  15  * implementation does not necessarily support PROT_EXEC or PROT_WRITE
  16  * without PROT_READ.  The only guarantees are that no writing will be
  17  * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
  18  */
  19 #define PROT_NONE       0x0             /* page can not be accessed */
  20 #define PROT_READ       0x1             /* page can be read */
  21 #define PROT_WRITE      0x2             /* page can be written */
  22 #define PROT_EXEC       0x4             /* page can be executed */
  23
  24 /*
  25  * Flags for mmap
  26  */
  27 #define MAP_SHARED      0x001           /* Share changes */
  28 #define MAP_PRIVATE     0x002           /* Changes are private */
  29 #define MAP_TYPE        0x00f           /* Mask for type of mapping */
  30 #define MAP_FIXED       0x010           /* Interpret addr exactly */
  31
  32 /* not used by linux, but here to make sure we don't clash with ABI defines */
  33 #define MAP_RENAME      0x020           /* Assign page to file */
  34 #define MAP_AUTOGROW    0x040           /* File may grow by writing */
  35 #define MAP_LOCAL       0x080           /* Copy on fork/sproc */
  36 #define MAP_AUTORSRV    0x100           /* Logical swap reserved on demand */
  37
  38 /* These are linux-specific */
  39 #define MAP_NORESERVE   0x0400          /* don't check for reservations */
  40 #define MAP_ANONYMOUS   0x0800          /* don't use a file */
  41 #define MAP_GROWSDOWN   0x1000          /* stack-like segment */
  42 #define MAP_DENYWRITE   0x2000          /* ETXTBSY */
  43 #define MAP_EXECUTABLE  0x4000          /* mark it as an executable */
  44 #define MAP_LOCKED      0x8000          /* pages are locked */
  45
  46 /*
  47  * Flags for msync
  48  */
  49 #define MS_SYNC         0               /* synchronous memory sync */
  50 #define MS_ASYNC        1               /* sync memory asynchronously */
  51 #define MS_INVALIDATE   2               /* invalidate mappings & caches */
  52
  53 /*
  54  * Flags for mlockall
  55  */
  56 #define MCL_CURRENT     1               /* lock all current mappings */
  57 #define MCL_FUTURE      2               /* lock all future mappings */
  58
  59 /* compatibility flags */
  60 #define MAP_ANON       MAP_ANONYMOUS
  61 #define MAP_FILE       0
  62
  63 #endif /* __ASM_MIPS_MMAN_H */