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TOMOYO Linux Cross Reference
Linux/arch/mips/include/uapi/asm/mman.h

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  1 /*
  2  * This file is subject to the terms and conditions of the GNU General Public
  3  * License.  See the file "COPYING" in the main directory of this archive
  4  * for more details.
  5  *
  6  * Copyright (C) 1995, 1999, 2002 by Ralf Baechle
  7  */
  8 #ifndef _ASM_MMAN_H
  9 #define _ASM_MMAN_H
 10 
 11 /*
 12  * Protections are chosen from these bits, OR'd together.  The
 13  * implementation does not necessarily support PROT_EXEC or PROT_WRITE
 14  * without PROT_READ.  The only guarantees are that no writing will be
 15  * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
 16  */
 17 #define PROT_NONE       0x00            /* page can not be accessed */
 18 #define PROT_READ       0x01            /* page can be read */
 19 #define PROT_WRITE      0x02            /* page can be written */
 20 #define PROT_EXEC       0x04            /* page can be executed */
 21 /*                      0x08               reserved for PROT_EXEC_NOFLUSH */
 22 #define PROT_SEM        0x10            /* page may be used for atomic ops */
 23 #define PROT_GROWSDOWN  0x01000000      /* mprotect flag: extend change to start of growsdown vma */
 24 #define PROT_GROWSUP    0x02000000      /* mprotect flag: extend change to end of growsup vma */
 25 
 26 /*
 27  * Flags for mmap
 28  */
 29 #define MAP_SHARED      0x001           /* Share changes */
 30 #define MAP_PRIVATE     0x002           /* Changes are private */
 31 #define MAP_TYPE        0x00f           /* Mask for type of mapping */
 32 #define MAP_FIXED       0x010           /* Interpret addr exactly */
 33 
 34 /* not used by linux, but here to make sure we don't clash with ABI defines */
 35 #define MAP_RENAME      0x020           /* Assign page to file */
 36 #define MAP_AUTOGROW    0x040           /* File may grow by writing */
 37 #define MAP_LOCAL       0x080           /* Copy on fork/sproc */
 38 #define MAP_AUTORSRV    0x100           /* Logical swap reserved on demand */
 39 
 40 /* These are linux-specific */
 41 #define MAP_NORESERVE   0x0400          /* don't check for reservations */
 42 #define MAP_ANONYMOUS   0x0800          /* don't use a file */
 43 #define MAP_GROWSDOWN   0x1000          /* stack-like segment */
 44 #define MAP_DENYWRITE   0x2000          /* ETXTBSY */
 45 #define MAP_EXECUTABLE  0x4000          /* mark it as an executable */
 46 #define MAP_LOCKED      0x8000          /* pages are locked */
 47 #define MAP_POPULATE    0x10000         /* populate (prefault) pagetables */
 48 #define MAP_NONBLOCK    0x20000         /* do not block on IO */
 49 #define MAP_STACK       0x40000         /* give out an address that is best suited for process/thread stacks */
 50 #define MAP_HUGETLB     0x80000         /* create a huge page mapping */
 51 
 52 /*
 53  * Flags for msync
 54  */
 55 #define MS_ASYNC        0x0001          /* sync memory asynchronously */
 56 #define MS_INVALIDATE   0x0002          /* invalidate mappings & caches */
 57 #define MS_SYNC         0x0004          /* synchronous memory sync */
 58 
 59 /*
 60  * Flags for mlockall
 61  */
 62 #define MCL_CURRENT     1               /* lock all current mappings */
 63 #define MCL_FUTURE      2               /* lock all future mappings */
 64 
 65 #define MADV_NORMAL     0               /* no further special treatment */
 66 #define MADV_RANDOM     1               /* expect random page references */
 67 #define MADV_SEQUENTIAL 2               /* expect sequential page references */
 68 #define MADV_WILLNEED   3               /* will need these pages */
 69 #define MADV_DONTNEED   4               /* don't need these pages */
 70 
 71 /* common parameters: try to keep these consistent across architectures */
 72 #define MADV_REMOVE     9               /* remove these pages & resources */
 73 #define MADV_DONTFORK   10              /* don't inherit across fork */
 74 #define MADV_DOFORK     11              /* do inherit across fork */
 75 
 76 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
 77 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
 78 #define MADV_HWPOISON    100            /* poison a page for testing */
 79 
 80 #define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
 81 #define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
 82 
 83 #define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
 84                                            overrides the coredump filter bits */
 85 #define MADV_DODUMP     17              /* Clear the MADV_NODUMP flag */
 86 
 87 /* compatibility flags */
 88 #define MAP_FILE        0
 89 
 90 /*
 91  * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
 92  * This gives us 6 bits, which is enough until someone invents 128 bit address
 93  * spaces.
 94  *
 95  * Assume these are all power of twos.
 96  * When 0 use the default page size.
 97  */
 98 #define MAP_HUGE_SHIFT  26
 99 #define MAP_HUGE_MASK   0x3f
100 
101 #endif /* _ASM_MMAN_H */
102 

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