| /* Definitions for POSIX memory map interface. Linux/HPPA version. |
| Copyright (C) 1997-2014 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 */ |
| #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 */ |
| |
| /* Flags for `mremap'. */ |
| #ifdef __USE_GNU |
| # define MREMAP_MAYMOVE 1 |
| # define MREMAP_FIXED 2 |
| #endif |
| |
| /* Advice to "madvise" */ |
| #ifdef __USE_BSD |
| # 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_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 */ |
| #endif |
| |
| /* The range 12-64 is reserved for page size specification. */ |
| #define MADV_4K_PAGES 12 /* Use 4K pages */ |
| #define MADV_16K_PAGES 14 /* Use 16K pages */ |
| #define MADV_64K_PAGES 16 /* Use 64K pages */ |
| #define MADV_256K_PAGES 18 /* Use 256K pages */ |
| #define MADV_1M_PAGES 20 /* Use 1 Megabyte pages */ |
| #define MADV_4M_PAGES 22 /* Use 4 Megabyte pages */ |
| #define MADV_16M_PAGES 24 /* Use 16 Megabyte pages */ |
| #define MADV_64M_PAGES 26 /* Use 64 Megabyte pages */ |
| |
| /* 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 |
