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 */ 68