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 50 /* 51 * Flags for msync 52 */ 53 #define MS_ASYNC 0x0001 /* sync memory asynchronously */ 54 #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ 55 #define MS_SYNC 0x0004 /* synchronous memory sync */ 56 57 /* 58 * Flags for mlockall 59 */ 60 #define MCL_CURRENT 1 /* lock all current mappings */ 61 #define MCL_FUTURE 2 /* lock all future mappings */ 62 63 #define MADV_NORMAL 0 /* no further special treatment */ 64 #define MADV_RANDOM 1 /* expect random page references */ 65 #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 66 #define MADV_WILLNEED 3 /* will need these pages */ 67 #define MADV_DONTNEED 4 /* don't need these pages */ 68 69 /* common parameters: try to keep these consistent across architectures */ 70 #define MADV_REMOVE 9 /* remove these pages & resources */ 71 #define MADV_DONTFORK 10 /* don't inherit across fork */ 72 #define MADV_DOFORK 11 /* do inherit across fork */ 73 74 /* compatibility flags */ 75 #define MAP_FILE 0 76 77 #endif /* _ASM_MMAN_H */ 78