arch/xtensa/include/uapi/asm/mman.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * include/asm-xtensa/mman.h
   4  *
   5  * Xtensa Processor memory-manager definitions
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file "COPYING" in the main directory of this archive
   9  * for more details.
  10  *
  11  * Copyright (C) 1995 by Ralf Baechle
  12  * Copyright (C) 2001 - 2005 Tensilica Inc.
  13  */
  14
  15 #ifndef _XTENSA_MMAN_H
  16 #define _XTENSA_MMAN_H
  17
  18 /*
  19  * Protections are chosen from these bits, OR'd together.  The
  20  * implementation does not necessarily support PROT_EXEC or PROT_WRITE
  21  * without PROT_READ.  The only guarantees are that no writing will be
  22  * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
  23  */
  24
  25 #define PROT_NONE       0x0             /* page can not be accessed */
  26 #define PROT_READ       0x1             /* page can be read */
  27 #define PROT_WRITE      0x2             /* page can be written */
  28 #define PROT_EXEC       0x4             /* page can be executed */
  29
  30 #define PROT_SEM        0x10            /* page may be used for atomic ops */
  31 #define PROT_GROWSDOWN  0x01000000      /* mprotect flag: extend change to start of growsdown vma */
  32 #define PROT_GROWSUP    0x02000000      /* mprotect flag: extend change to end fo growsup vma */
  33
  34 /*
  35  * Flags for mmap
  36  */
  37 #define MAP_SHARED      0x001           /* Share changes */
  38 #define MAP_PRIVATE     0x002           /* Changes are private */
  39 #define MAP_SHARED_VALIDATE 0x003       /* share + validate extension flags */
  40 #define MAP_TYPE        0x00f           /* Mask for type of mapping */
  41 #define MAP_FIXED       0x010           /* Interpret addr exactly */
  42
  43 /* not used by linux, but here to make sure we don't clash with ABI defines */
  44 #define MAP_RENAME      0x020           /* Assign page to file */
  45 #define MAP_AUTOGROW    0x040           /* File may grow by writing */
  46 #define MAP_LOCAL       0x080           /* Copy on fork/sproc */
  47 #define MAP_AUTORSRV    0x100           /* Logical swap reserved on demand */
  48
  49 /* These are linux-specific */
  50 #define MAP_NORESERVE   0x0400          /* don't check for reservations */
  51 #define MAP_ANONYMOUS   0x0800          /* don't use a file */
  52 #define MAP_GROWSDOWN   0x1000          /* stack-like segment */
  53 #define MAP_DENYWRITE   0x2000          /* ETXTBSY */
  54 #define MAP_EXECUTABLE  0x4000          /* mark it as an executable */
  55 #define MAP_LOCKED      0x8000          /* pages are locked */
  56 #define MAP_POPULATE    0x10000         /* populate (prefault) pagetables */
  57 #define MAP_NONBLOCK    0x20000         /* do not block on IO */
  58 #define MAP_STACK       0x40000         /* give out an address that is best suited for process/thread stacks */
  59 #define MAP_HUGETLB     0x80000         /* create a huge page mapping */
  60 #ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
  61 # define MAP_UNINITIALIZED 0x4000000    /* For anonymous mmap, memory could be
  62                                          * uninitialized */
  63 #else
  64 # define MAP_UNINITIALIZED 0x0          /* Don't support this flag */
  65 #endif
  66
  67 /*
  68  * Flags for msync
  69  */
  70 #define MS_ASYNC        0x0001          /* sync memory asynchronously */
  71 #define MS_INVALIDATE   0x0002          /* invalidate mappings & caches */
  72 #define MS_SYNC         0x0004          /* synchronous memory sync */
  73
  74 /*
  75  * Flags for mlockall
  76  */
  77 #define MCL_CURRENT     1               /* lock all current mappings */
  78 #define MCL_FUTURE      2               /* lock all future mappings */
  79 #define MCL_ONFAULT     4               /* lock all pages that are faulted in */
  80
  81 /*
  82  * Flags for mlock
  83  */
  84 #define MLOCK_ONFAULT   0x01            /* Lock pages in range after they are faulted in, do not prefault */
  85
  86 #define MADV_NORMAL     0               /* no further special treatment */
  87 #define MADV_RANDOM     1               /* expect random page references */
  88 #define MADV_SEQUENTIAL 2               /* expect sequential page references */
  89 #define MADV_WILLNEED   3               /* will need these pages */
  90 #define MADV_DONTNEED   4               /* don't need these pages */
  91
  92 /* common parameters: try to keep these consistent across architectures */
  93 #define MADV_FREE       8               /* free pages only if memory pressure */
  94 #define MADV_REMOVE     9               /* remove these pages & resources */
  95 #define MADV_DONTFORK   10              /* don't inherit across fork */
  96 #define MADV_DOFORK     11              /* do inherit across fork */
  97
  98 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  99 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
 100
 101 #define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
 102 #define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
 103
 104 #define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
 105                                            overrides the coredump filter bits */
 106 #define MADV_DODUMP     17              /* Clear the MADV_NODUMP flag */
 107
 108 #define MADV_WIPEONFORK 18              /* Zero memory on fork, child only */
 109 #define MADV_KEEPONFORK 19              /* Undo MADV_WIPEONFORK */
 110
 111 /* compatibility flags */
 112 #define MAP_FILE        0
 113
 114 #define PKEY_DISABLE_ACCESS     0x1
 115 #define PKEY_DISABLE_WRITE      0x2
 116 #define PKEY_ACCESS_MASK        (PKEY_DISABLE_ACCESS |\
 117                                  PKEY_DISABLE_WRITE)
 118
 119 #endif /* _XTENSA_MMAN_H */