projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9a8fd558 CZ |
1 | /* |
| 2 | * include/asm-xtensa/mman.h | |
| 3 | * | |
| 4 | * Xtensa Processor memory-manager definitions | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file "COPYING" in the main directory of this archive | |
| 8 | * for more details. | |
| 9 | * | |
| 10 | * Copyright (C) 1995 by Ralf Baechle | |
| 11 | * Copyright (C) 2001 - 2005 Tensilica Inc. | |
| 12 | */ | |
| 13 | ||
| 14 | #ifndef _XTENSA_MMAN_H | |
| 15 | #define _XTENSA_MMAN_H | |
| 16 | ||
| 17 | /* | |
| 18 | * Protections are chosen from these bits, OR'd together. The | |
| 19 | * implementation does not necessarily support PROT_EXEC or PROT_WRITE | |
| 20 | * without PROT_READ. The only guarantees are that no writing will be | |
| 21 | * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. | |
| 22 | */ | |
| 23 | ||
| 24 | #define PROT_NONE 0x0 /* page can not be accessed */ | |
| 25 | #define PROT_READ 0x1 /* page can be read */ | |
| 26 | #define PROT_WRITE 0x2 /* page can be written */ | |
| 27 | #define PROT_EXEC 0x4 /* page can be executed */ | |
| 28 | ||
| 29 | #define PROT_SEM 0x10 /* page may be used for atomic ops */ | |
| 30 | #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ | |
| 31 | #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end fo growsup vma */ | |
| 32 | ||
| 33 | /* | |
| 34 | * Flags for mmap | |
| 35 | */ | |
| 36 | #define MAP_SHARED 0x001 /* Share changes */ | |
| 37 | #define MAP_PRIVATE 0x002 /* Changes are private */ | |
| 38 | #define MAP_TYPE 0x00f /* Mask for type of mapping */ | |
| 39 | #define MAP_FIXED 0x010 /* Interpret addr exactly */ | |
| 40 | ||
| 41 | /* not used by linux, but here to make sure we don't clash with ABI defines */ | |
| 42 | #define MAP_RENAME 0x020 /* Assign page to file */ | |
| 43 | #define MAP_AUTOGROW 0x040 /* File may grow by writing */ | |
| 44 | #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ | |
| 45 | #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ | |
| 46 | ||
| 47 | /* These are linux-specific */ | |
| 48 | #define MAP_NORESERVE 0x0400 /* don't check for reservations */ | |
| 49 | #define MAP_ANONYMOUS 0x0800 /* don't use a file */ | |
| 50 | #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ | |
| 51 | #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ | |
| 52 | #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ | |
| 53 | #define MAP_LOCKED 0x8000 /* pages are locked */ | |
| 54 | #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ | |
| 55 | #define MAP_NONBLOCK 0x20000 /* do not block on IO */ | |
| 56 | ||
| 57 | /* | |
| 58 | * Flags for msync | |
| 59 | */ | |
| 60 | #define MS_ASYNC 0x0001 /* sync memory asynchronously */ | |
| 61 | #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ | |
| 62 | #define MS_SYNC 0x0004 /* synchronous memory sync */ | |
| 63 | ||
| 64 | /* | |
| 65 | * Flags for mlockall | |
| 66 | */ | |
| 67 | #define MCL_CURRENT 1 /* lock all current mappings */ | |
| 68 | #define MCL_FUTURE 2 /* lock all future mappings */ | |
| 69 | ||
| 70 | #define MADV_NORMAL 0x0 /* default page-in behavior */ | |
| 71 | #define MADV_RANDOM 0x1 /* page-in minimum required */ | |
| 72 | #define MADV_SEQUENTIAL 0x2 /* read-ahead aggressively */ | |
| 73 | #define MADV_WILLNEED 0x3 /* pre-fault pages */ | |
| 74 | #define MADV_DONTNEED 0x4 /* discard these pages */ | |
| f6b3ec23 | 75 | #define MADV_REMOVE 0x5 /* remove these pages & resources */ |
| 9a8fd558 CZ |
76 | |
| 77 | /* compatibility flags */ | |
| 78 | #define MAP_ANON MAP_ANONYMOUS | |
| 79 | #define MAP_FILE 0 | |
| 80 | ||
| 81 | #endif /* _XTENSA_MMAN_H */ |