arch/arm-native/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 #include <proto/kernel.h>
  15
  16 #include "exec_intern.h"
  17
  18 /* See rom/exec/cachepredma.c for documentation */
  19
  20 #include <proto/exec.h>
  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     D(bug("[exec] CachePreDMA(%08x, %d, %c) = %08x\n", address, *length, flags & DMA_ReadFromRAM ? 'R':'W', addr));
  33
  34     /* At PreDMA stage only data caches need to be flushed */
  35     CacheClearE(address, *length, CACRF_ClearD);
  36
  37     return addr;
  38
  39     AROS_LIBFUNC_EXIT
  40 } /* CachePreDMA() */