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117 lines
4.4 KiB
117 lines
4.4 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* include/asm-xtensa/mman.h |
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* |
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* Xtensa Processor memory-manager definitions |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1995 by Ralf Baechle |
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* Copyright (C) 2001 - 2005 Tensilica Inc. |
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*/ |
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#ifndef _XTENSA_MMAN_H |
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#define _XTENSA_MMAN_H |
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/* |
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* Protections are chosen from these bits, OR'd together. The |
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* implementation does not necessarily support PROT_EXEC or PROT_WRITE |
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* without PROT_READ. The only guarantees are that no writing will be |
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* allowed without PROT_WRITE and no access will be allowed for PROT_NONE. |
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*/ |
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#define PROT_NONE 0x0 /* page can not be accessed */ |
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#define PROT_READ 0x1 /* page can be read */ |
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#define PROT_WRITE 0x2 /* page can be written */ |
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#define PROT_EXEC 0x4 /* page can be executed */ |
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#define PROT_SEM 0x10 /* page may be used for atomic ops */ |
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#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ |
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#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end fo growsup vma */ |
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/* |
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* Flags for mmap |
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*/ |
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/* 0x01 - 0x03 are defined in linux/mman.h */ |
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#define MAP_TYPE 0x00f /* Mask for type of mapping */ |
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#define MAP_FIXED 0x010 /* Interpret addr exactly */ |
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/* not used by linux, but here to make sure we don't clash with ABI defines */ |
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#define MAP_RENAME 0x020 /* Assign page to file */ |
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#define MAP_AUTOGROW 0x040 /* File may grow by writing */ |
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#define MAP_LOCAL 0x080 /* Copy on fork/sproc */ |
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#define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ |
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/* These are linux-specific */ |
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#define MAP_NORESERVE 0x0400 /* don't check for reservations */ |
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#define MAP_ANONYMOUS 0x0800 /* don't use a file */ |
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#define MAP_GROWSDOWN 0x1000 /* stack-like segment */ |
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#define MAP_DENYWRITE 0x2000 /* ETXTBSY */ |
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#define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ |
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#define MAP_LOCKED 0x8000 /* pages are locked */ |
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#define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ |
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#define MAP_NONBLOCK 0x20000 /* do not block on IO */ |
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#define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ |
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#define MAP_HUGETLB 0x80000 /* create a huge page mapping */ |
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#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ |
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#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be |
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* uninitialized */ |
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/* |
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* Flags for msync |
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*/ |
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#define MS_ASYNC 0x0001 /* sync memory asynchronously */ |
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#define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ |
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#define MS_SYNC 0x0004 /* synchronous memory sync */ |
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/* |
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* Flags for mlockall |
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*/ |
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#define MCL_CURRENT 1 /* lock all current mappings */ |
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#define MCL_FUTURE 2 /* lock all future mappings */ |
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#define MCL_ONFAULT 4 /* lock all pages that are faulted in */ |
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/* |
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* Flags for mlock |
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*/ |
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#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ |
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#define MADV_NORMAL 0 /* no further special treatment */ |
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#define MADV_RANDOM 1 /* expect random page references */ |
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#define MADV_SEQUENTIAL 2 /* expect sequential page references */ |
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#define MADV_WILLNEED 3 /* will need these pages */ |
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#define MADV_DONTNEED 4 /* don't need these pages */ |
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/* common parameters: try to keep these consistent across architectures */ |
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#define MADV_FREE 8 /* free pages only if memory pressure */ |
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#define MADV_REMOVE 9 /* remove these pages & resources */ |
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#define MADV_DONTFORK 10 /* don't inherit across fork */ |
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#define MADV_DOFORK 11 /* do inherit across fork */ |
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#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ |
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#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ |
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#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ |
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#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ |
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#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, |
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overrides the coredump filter bits */ |
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#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ |
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#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ |
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#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ |
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#define MADV_COLD 20 /* deactivate these pages */ |
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#define MADV_PAGEOUT 21 /* reclaim these pages */ |
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/* compatibility flags */ |
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#define MAP_FILE 0 |
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#define PKEY_DISABLE_ACCESS 0x1 |
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#define PKEY_DISABLE_WRITE 0x2 |
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#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ |
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PKEY_DISABLE_WRITE) |
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#endif /* _XTENSA_MMAN_H */
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