rom/kernel/remirqhandler.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6 */
   7
   8 #include <aros/kernel.h>
   9 #include <aros/libcall.h>
  10 #include <proto/exec.h>
  11
  12 #include <kernel_base.h>
  13 #include <kernel_interrupts.h>
  14 #include <kernel_objects.h>
  15
  16 /*****************************************************************************
  17
  18     NAME */
  19 #include <proto/kernel.h>
  20
  21         AROS_LH1(void, KrnRemIRQHandler,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(void *, handle, A0),
  25
  26 /*  LOCATION */
  27          struct KernelBase *, KernelBase, 8, Kernel)
  28
  29 /*  FUNCTION
  30         Remove previously installed hardware IRQ handler
  31
  32     INPUTS
  33         handle - an opaque handler returned by KrnAddIRQHandler()
  34                  function
  35
  36     RESULT
  37         None
  38
  39     NOTES
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46
  47     INTERNALS
  48
  49 ******************************************************************************/
  50 {
  51     AROS_LIBFUNC_INIT
  52
  53     struct IntrNode *h = handle;
  54     uint8_t irq = h->in_nr;
  55
  56     if (h && (h->in_type == it_interrupt))
  57     {
  58         (void)goSuper();
  59
  60         Disable();
  61         REMOVE(h);
  62         if (IsListEmpty(&KERNELIRQ_LIST(irq)))
  63         {
  64                 ictl_disable_irq(irq, KernelBase);
  65         }
  66         Enable();
  67
  68         krnFreeIntrNode(h);
  69
  70         goUser();
  71     }
  72
  73     AROS_LIBFUNC_EXIT
  74 }