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 0 /* no further special treatment */ 71#define MADV_RANDOM 1 /* expect random page references */ 72#define MADV_SEQUENTIAL 2 /* expect sequential page references */ 73#define MADV_WILLNEED 3 /* will need these pages */ 74#define MADV_DONTNEED 4 /* don't need these pages */ 75 76/* common parameters: try to keep these consistent across architectures */ 77#define MADV_REMOVE 9 /* remove these pages & resources */ 78#define MADV_DONTFORK 10 /* don't inherit across fork */ 79#define MADV_DOFORK 11 /* do inherit across fork */ 80 81/* compatibility flags */ 82#define MAP_FILE 0 83 84#endif /* _XTENSA_MMAN_H */ 85