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/* Definitions for POSIX memory map interface. Linux/HPPA version.
Copyright (C) 1997-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_MMAN_H
# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
#endif
/* These are taken from the kernel definitions. */
#define PROT_READ 0x1 /* Page can be read */
#define PROT_WRITE 0x2 /* Page can be written */
#define PROT_EXEC 0x4 /* Page can be executed */
#define PROT_NONE 0x0 /* Page can not be accessed */
#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
growsdown vma (mprotect only). */
#define PROT_GROWSUP 0x02000000 /* Extend change to start of
growsup vma (mprotect only). */
#define MAP_SHARED 0x01 /* Share changes */
#define MAP_PRIVATE 0x02 /* Changes are private */
#ifdef __USE_MISC
# define MAP_TYPE 0x03 /* Mask for type of mapping */
#endif
/* Other flags. */
#define MAP_FIXED 0x04 /* Interpret addr exactly */
#ifdef __USE_MISC
# define MAP_FILE 0x0
# define MAP_ANONYMOUS 0x10 /* Don't use a file */
# define MAP_ANON MAP_ANONYMOUS
# define MAP_VARIABLE 0
/* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. */
# define MAP_HUGE_SHIFT 26
# define MAP_HUGE_MASK 0x3f
#endif
/* These are Linux-specific. */
#ifdef __USE_MISC
# define MAP_DENYWRITE 0x0800 /* ETXTBSY */
# define MAP_EXECUTABLE 0x1000 /* Mark it as an executable */
# define MAP_LOCKED 0x2000 /* Pages are locked */
# define MAP_NORESERVE 0x4000 /* Don't check for reservations */
# define MAP_GROWSDOWN 0x8000 /* Stack-like segment */
# define MAP_POPULATE 0x10000 /* Populate (prefault) pagetables */
# define MAP_NONBLOCK 0x20000 /* Do not block on IO */
# define MAP_STACK 0x40000 /* Create for process/thread stacks */
# define MAP_HUGETLB 0x80000 /* Create a huge page mapping */
#endif
/* Flags to "msync" */
#define MS_SYNC 1 /* Synchronous memory sync */
#define MS_ASYNC 2 /* Sync memory asynchronously */
#define MS_INVALIDATE 4 /* Invalidate the caches */
/* Flags to "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 `mremap'. */
#ifdef __USE_GNU
# define MREMAP_MAYMOVE 1
# define MREMAP_FIXED 2
#endif
/* Advice to "madvise" */
#ifdef __USE_MISC
# 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 /* Dont need these pages */
# define MADV_SPACEAVAIL 5 /* Insure that resources are reserved */
# define MADV_VPS_PURGE 6 /* Purge pages from VM page cache */
# define MADV_VPS_INHERIT 7 /* Inherit parents page size */
# define MADV_FREE 8 /* Free pages only if memory pressure. */
# define MADV_REMOVE 9 /* Remove these pages and resources. */
# define MADV_DONTFORK 10 /* Do not inherit across fork. */
# define MADV_DOFORK 11 /* Do inherit across fork. */
# define MADV_MERGEABLE 65 /* KSM may merge identical pages */
# define MADV_UNMERGEABLE 66 /* KSM may not merge identical pages */
# define MADV_HUGEPAGE 67 /* Worth backing with hugepages */
# define MADV_NOHUGEPAGE 68 /* Not worth backing with hugepages */
# define MADV_DONTDUMP 69 /* Explicity exclude from the core dump,
overrides the coredump filter bits */
# define MADV_DODUMP 70 /* Clear the MADV_NODUMP flag */
#endif
/* The POSIX people had to invent similar names for the same things. */
#ifdef __USE_XOPEN2K
# define POSIX_MADV_NORMAL 0 /* No further special treatment. */
# define POSIX_MADV_RANDOM 1 /* Expect random page references. */
# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
#endif
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