The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/include/asm-mips64/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 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       0x0             /* page can not be accessed */
   18 #define PROT_READ       0x1             /* page can be read */
   19 #define PROT_WRITE      0x2             /* page can be written */
   20 #define PROT_EXEC       0x4             /* page can be executed */
   21 
   22 /*
   23  * Flags for mmap
   24  */
   25 #define MAP_SHARED      0x001           /* Share changes */
   26 #define MAP_PRIVATE     0x002           /* Changes are private */
   27 #define MAP_TYPE        0x00f           /* Mask for type of mapping */
   28 #define MAP_FIXED       0x010           /* Interpret addr exactly */
   29 
   30 /* not used by linux, but here to make sure we don't clash with ABI defines */
   31 #define MAP_RENAME      0x020           /* Assign page to file */
   32 #define MAP_AUTOGROW    0x040           /* File may grow by writing */
   33 #define MAP_LOCAL       0x080           /* Copy on fork/sproc */
   34 #define MAP_AUTORSRV    0x100           /* Logical swap reserved on demand */
   35 
   36 /* These are linux-specific */
   37 #define MAP_NORESERVE   0x0400          /* don't check for reservations */
   38 #define MAP_ANONYMOUS   0x0800          /* don't use a file */
   39 #define MAP_GROWSDOWN   0x1000          /* stack-like segment */
   40 #define MAP_DENYWRITE   0x2000          /* ETXTBSY */
   41 #define MAP_EXECUTABLE  0x4000          /* mark it as an executable */
   42 #define MAP_LOCKED      0x8000          /* pages are locked */
   43 
   44 /*
   45  * Flags for msync
   46  */
   47 #define MS_ASYNC        0x0001          /* sync memory asynchronously */
   48 #define MS_INVALIDATE   0x0002          /* invalidate mappings & caches */
   49 #define MS_SYNC         0x0004          /* synchronous memory sync */
   50 
   51 /*
   52  * Flags for mlockall
   53  */
   54 #define MCL_CURRENT     1               /* lock all current mappings */
   55 #define MCL_FUTURE      2               /* lock all future mappings */
   56 
   57 #define MADV_NORMAL     0x0             /* default page-in behavior */
   58 #define MADV_RANDOM     0x1             /* page-in minimum required */
   59 #define MADV_SEQUENTIAL 0x2             /* read-ahead aggressively */
   60 #define MADV_WILLNEED   0x3             /* pre-fault pages */
   61 #define MADV_DONTNEED   0x4             /* discard these pages */
   62 
   63 /* compatibility flags */
   64 #define MAP_ANON       MAP_ANONYMOUS
   65 #define MAP_FILE       0
   66 
   67 #endif /* _ASM_MMAN_H */

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