arch/all-mingw32/kernel/setprotection.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/libcall.h>
   7 #include <aros/kernel.h>
   8
   9 #include <inttypes.h>
  10
  11 #include "kernel_base.h"
  12 #include "kernel_mingw32.h"
  13
  14 static unsigned int access_map[] =
  15 {
  16     PAGE_NOACCESS,
  17     PAGE_READONLY,
  18     PAGE_READWRITE, /* Windows has no write-only access */
  19     PAGE_READWRITE
  20 };
  21
  22 AROS_LH3(void, KrnSetProtection,
  23         AROS_LHA(void *, address, A0),
  24         AROS_LHA(uint32_t, length, D0),
  25         AROS_LHA(KRN_MapAttr, flags, D1),
  26         struct KernelBase *, KernelBase, 21, Kernel)
  27 {
  28     AROS_LIBFUNC_INIT
  29
  30     unsigned int win_flags = access_map[(flags & 0x0300) >> 8];
  31
  32     if (flags & MAP_Executable)
  33         win_flags <<= 4;
  34
  35     if (flags & MAP_CacheInhibit)
  36         win_flags = PAGE_NOCACHE;
  37     if (flags & MAP_WriteThrough)       /* FIXME: is it correct mapping? */
  38         win_flags |= PAGE_WRITECOMBINE;
  39     if (flags & MAP_Guarded)
  40         win_flags |= PAGE_GUARD;
  41
  42     KernelIFace.core_protect(address, length, win_flags);
  43
  44     AROS_LIBFUNC_EXIT
  45 }