1 files changed, 60 insertions, 0 deletions
diff --git a/c/src/exec/score/src/isr.c b/c/src/exec/score/src/isr.c
new file mode 100644
index 0000000000..b87bf9f249
--- /dev/null
+++ b/c/src/exec/score/src/isr.c
@@ -0,0 +1,60 @@
+/*
+ *  ISR Handler
+ *
+ *
+ *  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/core/isr.h>
+#include <rtems/core/stack.h>
+#include <rtems/core/interr.h>
+#include <rtems/core/wkspace.h>
+
+/*  _ISR_Handler_initialization
+ *
+ *  This routine initializes the ISR handler.
+ *
+ *  Input parameters: NONE
+ *
+ *  Output parameters: NONE
+ */
+
+void _ISR_Handler_initialization( void )
+{
+  _ISR_Signals_to_thread_executing = FALSE;
+
+  _ISR_Nest_level = 0;
+
+#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
+
+  if ( _CPU_Table.interrupt_stack_size < STACK_MINIMUM_SIZE )
+    _Internal_error_Occurred(
+      INTERNAL_ERROR_CORE,
+      TRUE,
+      INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL
+    );
+
+  _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
+
+}