117 lines
4.6 KiB
C
117 lines
4.6 KiB
C
|
/* 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 */
|
||
|
|
|
||
|
|
#define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */
|
||
|
|
#define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */
|
||
|
|
|
||
|
|
#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */
|
||
|
|
|
||
|
|
#define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */
|
||
|
|
|
||
|
|
/* 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 */
|