arch/ppc-chrp/exec/cachepredma.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CachePreDMA() - Do what is necessary for DMA.
   6     Lang: english
   7 */
   8
   9 #define DEBUG 0
  10
  11 #include <aros/debug.h>
  12 #include <exec/types.h>
  13 #include <aros/libcall.h>
  14
  15 #include "exec_intern.h"
  16
  17 #include <proto/exec.h>
  18 #include <proto/kernel.h>
  19
  20 /* See rom/exec/cachepredma.c for documentation */
  21
  22 AROS_LH3(APTR, CachePreDMA,
  23     AROS_LHA(APTR,    address, A0),
  24     AROS_LHA(ULONG *, length,  A1),
  25     AROS_LHA(ULONG,   flags,  D0),
  26     struct ExecBase *, SysBase, 127, Exec)
  27 {
  28     AROS_LIBFUNC_INIT
  29
  30     void *addr = KrnVirtualToPhysical(address);
  31
  32     /* At PreDMA stage only data caches need to be flushed */
  33     //if (flags & DMA_ReadFromRAM)
  34
  35     CacheClearE(address, *length, CACRF_ClearD);
  36
  37     return addr;
  38
  39     AROS_LIBFUNC_EXIT
  40 } /* CachePreDMA() */
  41