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