mman.h
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- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995, 1999 by Ralf Baechle
- */
- #ifndef _ASM_MMAN_H
- #define _ASM_MMAN_H
- /*
- * Protections are chosen from these bits, OR'd together. The
- * implementation does not necessarily support PROT_EXEC or PROT_WRITE
- * without PROT_READ. The only guarantees are that no writing will be
- * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
- */
- #define PROT_NONE 0x0 /* page can not be accessed */
- #define PROT_READ 0x1 /* page can be read */
- #define PROT_WRITE 0x2 /* page can be written */
- #define PROT_EXEC 0x4 /* page can be executed */
- /*
- * Flags for mmap
- */
- #define MAP_SHARED 0x001 /* Share changes */
- #define MAP_PRIVATE 0x002 /* Changes are private */
- #define MAP_TYPE 0x00f /* Mask for type of mapping */
- #define MAP_FIXED 0x010 /* Interpret addr exactly */
- /* not used by linux, but here to make sure we don't clash with ABI defines */
- #define MAP_RENAME 0x020 /* Assign page to file */
- #define MAP_AUTOGROW 0x040 /* File may grow by writing */
- #define MAP_LOCAL 0x080 /* Copy on fork/sproc */
- #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */
- /* These are linux-specific */
- #define MAP_NORESERVE 0x0400 /* don't check for reservations */
- #define MAP_ANONYMOUS 0x0800 /* don't use a file */
- #define MAP_GROWSDOWN 0x1000 /* stack-like segment */
- #define MAP_DENYWRITE 0x2000 /* ETXTBSY */
- #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */
- #define MAP_LOCKED 0x8000 /* pages are locked */
- /*
- * Flags for msync
- */
- #define MS_ASYNC 0x0001 /* sync memory asynchronously */
- #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */
- #define MS_SYNC 0x0004 /* synchronous memory sync */
- /*
- * Flags for mlockall
- */
- #define MCL_CURRENT 1 /* lock all current mappings */
- #define MCL_FUTURE 2 /* lock all future mappings */
- #define MADV_NORMAL 0x0 /* default page-in behavior */
- #define MADV_RANDOM 0x1 /* page-in minimum required */
- #define MADV_SEQUENTIAL 0x2 /* read-ahead aggressively */
- #define MADV_WILLNEED 0x3 /* pre-fault pages */
- #define MADV_DONTNEED 0x4 /* discard these pages */
- /* compatibility flags */
- #define MAP_ANON MAP_ANONYMOUS
- #define MAP_FILE 0
- #endif /* _ASM_MMAN_H */