arch/m68k-all/exec/cachepostdma.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CachePostDMA() - Do what is necessary for DMA.
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <exec/types.h>
  11 #include <exec/execbase.h>
  12 #include <aros/libcall.h>
  13
  14 extern void AROS_SLIB_ENTRY(CachePostDMA_00,Exec,128)(void);
  15 extern void AROS_SLIB_ENTRY(CachePostDMA_30,Exec,128)(void);
  16 extern void AROS_SLIB_ENTRY(CachePostDMA_40,Exec,128)(void);
  17
  18 #include <proto/exec.h>
  19
  20 /* See rom/exec/cachepostdma.c for documentation */
  21
  22 AROS_LH3(void, CachePostDMA,
  23     AROS_LHA(APTR,    address, A0),
  24     AROS_LHA(ULONG *, length,  A1),
  25     AROS_LHA(ULONG,   flags,  D0),
  26     struct ExecBase *, SysBase, 128, Exec)
  27 {
  28     AROS_LIBFUNC_INIT
  29     void (*func)(void);
  30
  31     /* When called the first time, this patches up the
  32      * Exec syscall table to directly point to the right routine.
  33      */
  34     Disable();
  35     if (SysBase->AttnFlags & AFF_68040) {
  36         /* 68040 support */
  37         func = AROS_SLIB_ENTRY(CachePostDMA_40, Exec, 128);
  38     } else if (SysBase->AttnFlags & AFF_68030) {
  39         /* 68030 support */
  40         func = AROS_SLIB_ENTRY(CachePostDMA_30, Exec, 128);
  41     } else {
  42         /* Everybody else (68000, 68010) */
  43         func = AROS_SLIB_ENTRY(CachePostDMA_00, Exec, 128);
  44     }
  45
  46     SetFunction((struct Library *)SysBase, -LIB_VECTSIZE * 128, func);
  47     Enable();
  48
  49     /* Call 'myself', which is now pointing to the correct routine */
  50     return CachePostDMA(address, length, flags);
  51
  52     AROS_LIBFUNC_EXIT
  53 } /* CachePostDMA */
  54