arch/m68k-all/kernel/setprotection.c

   1 #include <aros/kernel.h>
   2 #include <aros/libcall.h>
   3
   4 #include <kernel_base.h>
   5 #include <kernel_intern.h>
   6
   7 /*****************************************************************************
   8
   9     NAME */
  10 #include <proto/kernel.h>
  11
  12 AROS_LH3(void, KrnSetProtection,
  13
  14 /*  SYNOPSIS */
  15         AROS_LHA(void *, address, A0),
  16         AROS_LHA(uint32_t, length, D0),
  17         AROS_LHA(KRN_MapAttr, flags, D1),
  18
  19 /*  LOCATION */
  20         struct KernelBase *, KernelBase, 21, Kernel)
  21
  22 /*  FUNCTION
  23
  24     INPUTS
  25
  26     RESULT
  27
  28     NOTES
  29
  30     EXAMPLE
  31
  32     BUGS
  33
  34     SEE ALSO
  35
  36     INTERNALS
  37
  38 ******************************************************************************/
  39 {
  40     AROS_LIBFUNC_INIT
  41
  42     BOOL invalid = (flags & (MAP_Readable | MAP_Writable | MAP_Executable)) == 0;
  43     BOOL readonly = (flags & MAP_Writable) == 0;
  44     BOOL supervisor = (flags & MAP_Supervisor) != 0;
  45     UBYTE cm = (flags & MAP_CacheInhibit) ? CM_SERIALIZED : ((flags & MAP_WriteThrough) ? CM_WRITETHROUGH : CM_COPYBACK);
  46
  47     /* We need MAP_Supervisor and MAP_CacheInhibitSerialized */
  48
  49     if ((ULONG)address < 0x00200000 && cm == CM_SERIALIZED)
  50         cm = CM_NONCACHEABLE; /* Chip RAM does not need to be non-cacheable + serialized, only noncacheable */
  51
  52     map_region(KernelBase, address, NULL, length, invalid, readonly, supervisor, cm);
  53
  54     AROS_LIBFUNC_EXIT
  55 }