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diff --git a/include/rtems/score/corespinlock.h b/include/rtems/score/corespinlock.h
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+++ b/include/rtems/score/corespinlock.h
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+/**
+ *  @file  rtems/score/corespinlock.h
+ *
+ *  @brief Constants and Structures Associated with the Spinlock Handler
+ *
+ *  This include file contains all the constants and structures associated
+ *  with the Spinlock Handler.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2006.
+ *  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.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_CORESPINLOCK_H
+#define _RTEMS_SCORE_CORESPINLOCK_H
+
+#include <rtems/score/object.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  @defgroup ScoreSpinlock Spinlock Handler
+ *
+ *  @ingroup Score
+ *
+ *  This handler encapsulates functionality which provides the foundation
+ *  Spinlock services used in all of the APIs supported by RTEMS.
+ */
+/**@{*/
+
+/**
+ *  The following defines the control block used to manage the
+ *  attributes of each spinlock.
+ */
+typedef struct {
+  /** This element indicates XXX
+   */
+  uint32_t                  XXX;
+}   CORE_spinlock_Attributes;
+
+/**
+ *  The following defines the control block used to manage each
+ *  spinlock.
+ */
+typedef struct {
+  /** XXX may not be needed */
+  CORE_spinlock_Attributes  Attributes;
+
+  /** This field is the lock.
+   */
+  volatile uint32_t     lock;
+
+  /** This field is a count of the current number of threads using
+   *  this spinlock.  It includes the thread holding the lock as well
+   *  as those waiting.
+   */
+  volatile uint32_t     users;
+
+  /** This field is the Id of the thread holding the lock.  It may or may
+   *  not be the thread which acquired it.
+   */
+  volatile Objects_Id   holder;
+}   CORE_spinlock_Control;
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/*  end of include file */