linux/arch/mips/include/uapi/asm/mman.h
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   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2/*
   3 * This file is subject to the terms and conditions of the GNU General Public
   4 * License.  See the file "COPYING" in the main directory of this archive
   5 * for more details.
   6 *
   7 * Copyright (C) 1995, 1999, 2002 by Ralf Baechle
   8 */
   9#ifndef _ASM_MMAN_H
  10#define _ASM_MMAN_H
  11
  12/*
  13 * Protections are chosen from these bits, OR'd together.  The
  14 * implementation does not necessarily support PROT_EXEC or PROT_WRITE
  15 * without PROT_READ.  The only guarantees are that no writing will be
  16 * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
  17 */
  18#define PROT_NONE       0x00            /* page can not be accessed */
  19#define PROT_READ       0x01            /* page can be read */
  20#define PROT_WRITE      0x02            /* page can be written */
  21#define PROT_EXEC       0x04            /* page can be executed */
  22/*                      0x08               reserved for PROT_EXEC_NOFLUSH */
  23#define PROT_SEM        0x10            /* page may be used for atomic ops */
  24#define PROT_GROWSDOWN  0x01000000      /* mprotect flag: extend change to start of growsdown vma */
  25#define PROT_GROWSUP    0x02000000      /* mprotect flag: extend change to end of growsup vma */
  26
  27/*
  28 * Flags for mmap
  29 */
  30/* 0x01 - 0x03 are defined in linux/mman.h */
  31#define MAP_TYPE        0x00f           /* Mask for type of mapping */
  32#define MAP_FIXED       0x010           /* Interpret addr exactly */
  33
  34/* not used by linux, but here to make sure we don't clash with ABI defines */
  35#define MAP_RENAME      0x020           /* Assign page to file */
  36#define MAP_AUTOGROW    0x040           /* File may grow by writing */
  37#define MAP_LOCAL       0x080           /* Copy on fork/sproc */
  38#define MAP_AUTORSRV    0x100           /* Logical swap reserved on demand */
  39
  40/* These are linux-specific */
  41#define MAP_NORESERVE   0x0400          /* don't check for reservations */
  42#define MAP_ANONYMOUS   0x0800          /* don't use a file */
  43#define MAP_GROWSDOWN   0x1000          /* stack-like segment */
  44#define MAP_DENYWRITE   0x2000          /* ETXTBSY */
  45#define MAP_EXECUTABLE  0x4000          /* mark it as an executable */
  46#define MAP_LOCKED      0x8000          /* pages are locked */
  47#define MAP_POPULATE    0x10000         /* populate (prefault) pagetables */
  48#define MAP_NONBLOCK    0x20000         /* do not block on IO */
  49#define MAP_STACK       0x40000         /* give out an address that is best suited for process/thread stacks */
  50#define MAP_HUGETLB     0x80000         /* create a huge page mapping */
  51#define MAP_FIXED_NOREPLACE 0x100000    /* MAP_FIXED which doesn't unmap underlying mapping */
  52
  53/*
  54 * Flags for msync
  55 */
  56#define MS_ASYNC        0x0001          /* sync memory asynchronously */
  57#define MS_INVALIDATE   0x0002          /* invalidate mappings & caches */
  58#define MS_SYNC         0x0004          /* synchronous memory sync */
  59
  60/*
  61 * Flags for mlockall
  62 */
  63#define MCL_CURRENT     1               /* lock all current mappings */
  64#define MCL_FUTURE      2               /* lock all future mappings */
  65#define MCL_ONFAULT     4               /* lock all pages that are faulted in */
  66
  67/*
  68 * Flags for mlock
  69 */
  70#define MLOCK_ONFAULT   0x01            /* Lock pages in range after they are faulted in, do not prefault */
  71
  72#define MADV_NORMAL     0               /* no further special treatment */
  73#define MADV_RANDOM     1               /* expect random page references */
  74#define MADV_SEQUENTIAL 2               /* expect sequential page references */
  75#define MADV_WILLNEED   3               /* will need these pages */
  76#define MADV_DONTNEED   4               /* don't need these pages */
  77
  78/* common parameters: try to keep these consistent across architectures */
  79#define MADV_FREE       8               /* free pages only if memory pressure */
  80#define MADV_REMOVE     9               /* remove these pages & resources */
  81#define MADV_DONTFORK   10              /* don't inherit across fork */
  82#define MADV_DOFORK     11              /* do inherit across fork */
  83
  84#define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  85#define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
  86#define MADV_HWPOISON    100            /* poison a page for testing */
  87
  88#define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
  89#define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
  90
  91#define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
  92                                           overrides the coredump filter bits */
  93#define MADV_DODUMP     17              /* Clear the MADV_NODUMP flag */
  94
  95#define MADV_WIPEONFORK 18              /* Zero memory on fork, child only */
  96#define MADV_KEEPONFORK 19              /* Undo MADV_WIPEONFORK */
  97
  98#define MADV_COLD       20              /* deactivate these pages */
  99#define MADV_PAGEOUT    21              /* reclaim these pages */
 100
 101/* compatibility flags */
 102#define MAP_FILE        0
 103
 104#define PKEY_DISABLE_ACCESS     0x1
 105#define PKEY_DISABLE_WRITE      0x2
 106#define PKEY_ACCESS_MASK        (PKEY_DISABLE_ACCESS |\
 107                                 PKEY_DISABLE_WRITE)
 108
 109#endif /* _ASM_MMAN_H */
 110