1633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* 2633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * This file is subject to the terms and conditions of the GNU General Public 3633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * License. See the file "COPYING" in the main directory of this archive 4633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * for more details. 5633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * 6633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * Copyright (C) 1995, 1999, 2002 by Ralf Baechle 7633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham */ 8633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#ifndef _ASM_MMAN_H 9633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define _ASM_MMAN_H 10633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 11633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* 12633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * Protections are chosen from these bits, OR'd together. The 13633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * implementation does not necessarily support PROT_EXEC or PROT_WRITE 14633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * without PROT_READ. The only guarantees are that no writing will be 15633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. 16633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham */ 17633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_NONE 0x00 /* page can not be accessed */ 18633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_READ 0x01 /* page can be read */ 19633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_WRITE 0x02 /* page can be written */ 20633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_EXEC 0x04 /* page can be executed */ 21633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* 0x08 reserved for PROT_EXEC_NOFLUSH */ 22633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_SEM 0x10 /* page may be used for atomic ops */ 23633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ 24633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ 25633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 26633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* 27633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * Flags for mmap 28633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham */ 29633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_SHARED 0x001 /* Share changes */ 30633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_PRIVATE 0x002 /* Changes are private */ 31633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_TYPE 0x00f /* Mask for type of mapping */ 32633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_FIXED 0x010 /* Interpret addr exactly */ 33633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 34633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* not used by linux, but here to make sure we don't clash with ABI defines */ 35633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_RENAME 0x020 /* Assign page to file */ 36633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_AUTOGROW 0x040 /* File may grow by writing */ 37633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_LOCAL 0x080 /* Copy on fork/sproc */ 38633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ 39633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 40633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* These are linux-specific */ 41633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_NORESERVE 0x0400 /* don't check for reservations */ 42633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_ANONYMOUS 0x0800 /* don't use a file */ 43633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_GROWSDOWN 0x1000 /* stack-like segment */ 44633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_DENYWRITE 0x2000 /* ETXTBSY */ 45633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ 46633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_LOCKED 0x8000 /* pages are locked */ 47633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ 48633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_NONBLOCK 0x20000 /* do not block on IO */ 4937ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ 5037ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MAP_HUGETLB 0x80000 /* create a huge page mapping */ 51633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 52633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* 53633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * Flags for msync 54633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham */ 55633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MS_ASYNC 0x0001 /* sync memory asynchronously */ 56633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ 57633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MS_SYNC 0x0004 /* synchronous memory sync */ 58633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 59633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* 60633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham * Flags for mlockall 61633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham */ 62633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MCL_CURRENT 1 /* lock all current mappings */ 63633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MCL_FUTURE 2 /* lock all future mappings */ 64633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 65633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_NORMAL 0 /* no further special treatment */ 66633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_RANDOM 1 /* expect random page references */ 67633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_SEQUENTIAL 2 /* expect sequential page references */ 68633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_WILLNEED 3 /* will need these pages */ 69633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_DONTNEED 4 /* don't need these pages */ 70633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 71633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* common parameters: try to keep these consistent across architectures */ 72633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_REMOVE 9 /* remove these pages & resources */ 73633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_DONTFORK 10 /* don't inherit across fork */ 74633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MADV_DOFORK 11 /* do inherit across fork */ 75633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 7637ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 7737ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 7837ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_HWPOISON 100 /* poison a page for testing */ 7937ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham 8037ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 8137ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 8237ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham 8337ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, 8437ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham overrides the coredump filter bits */ 8537ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ 8637ed891e8a84d23f13a87c067391b0e8a5bb14eaRaghu Gandham 87633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham/* compatibility flags */ 88633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#define MAP_FILE 0 89633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham 90633c3473533ad9f2cca069b22cc5d95cd4e3510bRaghu Gandham#endif /* _ASM_MMAN_H */ 91