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