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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1995, 1999, 2002 by Ralf Baechle */ #ifndef _ASM_MMAN_H #define _ASM_MMAN_H /* * Protections are chosen from these bits, OR'd together. The * implementation does not necessarily support PROT_EXEC or PROT_WRITE * without PROT_READ. The only guarantees are that no writing will be * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */ #define PROT_NONE 0x00 /* page can not be accessed */ #define PROT_READ 0x01 /* page can be read */ #define PROT_WRITE 0x02 /* page can be written */ #define PROT_EXEC 0x04 /* page can be executed */ /* 0x08 reserved for PROT_EXEC_NOFLUSH */ #define PROT_SEM 0x10 /* page may be used for atomic ops */ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ /* * Flags for mmap */ /* 0x01 - 0x03 are defined in linux/mman.h */ #define MAP_TYPE 0x00f /* Mask for type of mapping */ #define MAP_FIXED 0x010 /* Interpret addr exactly */ /* not used by linux, but here to make sure we don't clash with ABI defines */ #define MAP_RENAME 0x020 /* Assign page to file */ #define MAP_AUTOGROW 0x040 /* File may grow by writing */ #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ /* These are linux-specific */ #define MAP_NORESERVE 0x0400 /* don't check for reservations */ #define MAP_ANONYMOUS 0x0800 /* don't use a file */ #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ #define MAP_LOCKED 0x8000 /* pages are locked */ #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ #define MAP_NONBLOCK 0x20000 /* do not block on IO */ #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ /* * Flags for msync */ #define MS_ASYNC 0x0001 /* sync memory asynchronously */ #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ #define MS_SYNC 0x0004 /* synchronous memory sync */ /* * Flags for mlockall */ #define MCL_CURRENT 1 /* lock all current mappings */ #define MCL_FUTURE 2 /* lock all future mappings */ #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ /* * Flags for mlock */ #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ #define MADV_NORMAL 0 /* no further special treatment */ #define MADV_RANDOM 1 /* expect random page references */ #define MADV_SEQUENTIAL 2 /* expect sequential page references */ #define MADV_WILLNEED 3 /* will need these pages */ #define MADV_DONTNEED 4 /* don't need these pages */ /* common parameters: try to keep these consistent across architectures */ #define MADV_FREE 8 /* free pages only if memory pressure */ #define MADV_REMOVE 9 /* remove these pages & resources */ #define MADV_DONTFORK 10 /* don't inherit across fork */ #define MADV_DOFORK 11 /* do inherit across fork */ #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ #define MADV_HWPOISON 100 /* poison a page for testing */ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, overrides the coredump filter bits */ #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ #define MADV_COLD 20 /* deactivate these pages */ #define MADV_PAGEOUT 21 /* reclaim these pages */ /* compatibility flags */ #define MAP_FILE 0 #define PKEY_DISABLE_ACCESS 0x1 #define PKEY_DISABLE_WRITE 0x2 #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ PKEY_DISABLE_WRITE) #endif /* _ASM_MMAN_H */
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