rom/exec/setintvector.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Install an interrupt handler.
   6     Lang: english
   7 */
   8 #include <exec/execbase.h>
   9 #include <exec/interrupts.h>
  10 #include <proto/exec.h>
  11 #include <aros/libcall.h>
  12
  13 #include "exec_debug.h"
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18
  19         AROS_LH2(struct Interrupt *, SetIntVector,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(ULONG,              intNumber, D0),
  23         AROS_LHA(struct Interrupt *, interrupt, A1),
  24
  25 /*  LOCATION */
  26         struct ExecBase *, SysBase, 27, Exec)
  27
  28 /*  FUNCTION
  29
  30     INPUTS
  31
  32     RESULT
  33
  34     NOTES
  35
  36     EXAMPLE
  37
  38     BUGS
  39
  40     SEE ALSO
  41
  42     INTERNALS
  43
  44 ******************************************************************************/
  45 {
  46     AROS_LIBFUNC_INIT
  47     struct Interrupt *oldint;
  48     BOOL ishandler = intNumber <= 2 || (intNumber >= 6 && intNumber <= 12);
  49
  50     ExecLog(SysBase, EXECDEBUGF_EXCEPTHANDLER, "SetIntVector: Int %d, Interrupt %p\n", intNumber, interrupt);
  51
  52     Disable ();
  53
  54     oldint = (struct Interrupt *)SysBase->IntVects[intNumber].iv_Node;
  55     SysBase->IntVects[intNumber].iv_Node = ishandler ? (struct Node *)interrupt : NULL;
  56
  57     if (interrupt)
  58     {
  59         SysBase->IntVects[intNumber].iv_Data = interrupt->is_Data;
  60         SysBase->IntVects[intNumber].iv_Code = interrupt->is_Code;
  61     }
  62     else
  63     {
  64         SysBase->IntVects[intNumber].iv_Data = (APTR)~0;
  65         SysBase->IntVects[intNumber].iv_Code = (void *)~0;
  66     }
  67
  68     Enable ();
  69
  70     return oldint;
  71
  72     AROS_LIBFUNC_EXIT
  73 } /* SetIntVector */