1 files changed, 85 insertions, 0 deletions
diff --git a/c/src/exec/rtems/src/intr.c b/c/src/exec/rtems/src/intr.c
new file mode 100644
index 0000000000..25f5176967
--- /dev/null
+++ b/c/src/exec/rtems/src/intr.c
@@ -0,0 +1,85 @@
+/*
+ *  Interrupt Manager
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/isr.h>
+#include <rtems/stack.h>
+#include <rtems/intr.h>
+#include <rtems/wkspace.h>
+
+/*  _Interrupt_Manager_initialization
+ *
+ *  This routine initializes the interrupt manager.
+ *
+ *  Input parameters: NONE
+ *
+ *  Output parameters: NONE
+ */
+
+void _Interrupt_Manager_initialization( void )
+{
+#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
+
+  if ( _CPU_Table.interrupt_stack_size < RTEMS_MINIMUM_STACK_SIZE )
+    rtems_fatal_error_occurred( RTEMS_INVALID_SIZE );
+
+  _CPU_Interrupt_stack_low =
+    _Workspace_Allocate_or_fatal_error( _CPU_Table.interrupt_stack_size );
+
+  _CPU_Interrupt_stack_high = _Addresses_Add_offset(
+    _CPU_Interrupt_stack_low,
+    _CPU_Table.interrupt_stack_size
+  );
+
+#endif
+
+#if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE )
+  _CPU_Install_interrupt_stack();
+#endif
+
+}
+
+/*  rtems_interrupt_catch
+ *
+ *  This directive allows a thread to specify what action to take when
+ *  catching signals.
+ *
+ *  Input parameters:
+ *    new_isr_handler - address of interrupt service routine (isr)
+ *    vector          - interrupt vector number
+ *    old_isr_handler - address at which to store previous ISR address
+ *
+ *  Output parameters:
+ *    RTEMS_SUCCESSFUL - always succeeds
+ *    *old_isr_handler  - previous ISR address
+ */
+
+rtems_status_code rtems_interrupt_catch(
+  rtems_isr_entry      new_isr_handler,
+  rtems_vector_number  vector,
+  rtems_isr_entry     *old_isr_handler
+)
+{
+  if ( !_ISR_Is_vector_number_valid( vector ) )
+    return( RTEMS_INVALID_NUMBER );
+
+  if ( !_ISR_Is_valid_user_handler( new_isr_handler ) )
+    return( RTEMS_INVALID_ADDRESS );
+
+  _ISR_Install_vector(
+    vector, (proc_ptr)new_isr_handler, (proc_ptr *)old_isr_handler );
+
+  return( RTEMS_SUCCESSFUL );
+}