1 files changed, 83 insertions, 0 deletions
diff --git a/cpukit/score/src/isr.c b/cpukit/score/src/isr.c
new file mode 100644
index 0000000000..799bb08dbb
--- /dev/null
+++ b/cpukit/score/src/isr.c
@@ -0,0 +1,83 @@
+/*
+ *  ISR Handler
+ *
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/system.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/stack.h>
+#include <rtems/score/interr.h>
+#include <rtems/score/wkspace.h>
+#include <rtems/config.h>
+
+/*  _ISR_Handler_initialization
+ *
+ *  This routine initializes the ISR handler.
+ *
+ *  Input parameters: NONE
+ *
+ *  Output parameters: NONE
+ */
+
+void _ISR_Handler_initialization( void )
+{
+  _ISR_Nest_level = 0;
+
+#if (CPU_SIMPLE_VECTORED_INTERRUPTS == TRUE)
+  _ISR_Vector_table = _Workspace_Allocate_or_fatal_error(
+     sizeof(ISR_Handler_entry) * ISR_NUMBER_OF_VECTORS
+  );
+#endif
+
+  _CPU_Initialize_vectors();
+
+#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
+
+  if ( !_Stack_Is_enough(Configuration.interrupt_stack_size) )
+    _Internal_error_Occurred(
+      INTERNAL_ERROR_CORE,
+      true,
+      INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL
+    );
+
+  _CPU_Interrupt_stack_low = _Workspace_Allocate_or_fatal_error(
+    Configuration.interrupt_stack_size
+  );
+
+  _CPU_Interrupt_stack_high = _Addresses_Add_offset(
+    _CPU_Interrupt_stack_low,
+    Configuration.interrupt_stack_size
+  );
+
+#if (CPU_STACK_ALIGNMENT != 0)
+  _CPU_Interrupt_stack_high = (void *)
+    ((uintptr_t) _CPU_Interrupt_stack_high & ~(CPU_STACK_ALIGNMENT - 1));
+#endif
+
+  /* Interrupt stack might have to be aligned and/or setup
+   * in a specific way.
+   */
+#if defined(_CPU_Interrupt_stack_setup)
+  _CPU_Interrupt_stack_setup(_CPU_Interrupt_stack_low, _CPU_Interrupt_stack_high);
+#endif
+
+#endif
+
+#if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE )
+  _CPU_Install_interrupt_stack();
+#endif
+
+}