2011-05-23 Jennifer Averett <Jennifer.Averett@OARcorp.com>

	* score/Makefile.am, score/include/rtems/score/thread.h,
	score/inline/rtems/score/thread.inl: Add smp support to dispable
	dispatch level accesses.
	* score/src/threaddispatchdisablelevel.c: New file.

1 files changed, 55 insertions, 0 deletions

diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index 785d8a149e..c3462024d9 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -464,6 +464,14 @@ SCORE_EXTERN Context_Control _Thread_BSP_context;
  */
 SCORE_EXTERN volatile uint32_t   _Thread_Dispatch_disable_level;
 
+#if defined(RTEMS_SMP)
+  /**
+   * The following declares the smp spinlock to be used to control
+   * the dispatch critical section accesses across cpus.
+   */
+  SCORE_EXTERN SMP_lock_spinlock_nested_Control _Thread_Dispatch_disable_level_lock;
+#endif
+
 /**
  *  The following holds how many user extensions are in the system.  This
  *  is used to determine how many user extension data areas to allocate
@@ -784,6 +792,53 @@ void _Thread_blocking_operation_Cancel(
   ISR_Level                         level
 );
 
+
+#if defined(RTEMS_SMP)
+
+  /** @brief _Thread_Dispatch_initialization
+   * 
+   *  This routine initializes the thread dispatching subsystem.
+   */
+  void _Thread_Dispatch_initialization(void);
+
+  /** @brief _Thread_Dispatch_in_critical_section
+   * 
+   * This routine returns true if thread dispatch indicates
+   * that we are in a critical section.
+   */
+  bool _Thread_Dispatch_in_critical_section(void);
+
+  /** @brief _Thread_Dispatch_get_disable_level
+   * 
+   * This routine returns value of the the thread dispatch level.
+   */
+  uint32_t _Thread_Dispatch_get_disable_level(void);
+
+  /** @brief _Thread_Dispatch_set_disable_level
+   * 
+   * This routine sets thread dispatch level to the 
+   * value passed in.
+   */
+  uint32_t _Thread_Dispatch_set_disable_level(uint32_t value);
+
+  /** @brief _Thread_Dispatch_increment_disable_level
+   *
+   * This rountine increments the thread dispatch level
+   */
+  uint32_t _Thread_Dispatch_increment_disable_level(void);
+
+  /** @brief _Thread_Dispatch_decrement_disable_level
+   * 
+   * This routine decrements the thread dispatch level.
+   */
+  uint32_t _Thread_Dispatch_decrement_disable_level(void);
+
+#else
+  /*
+   * The _Thread_Dispatch_... functions are in thread.inl
+   */
+#endif
+
 #ifndef __RTEMS_APPLICATION__
 #include <rtems/score/thread.inl>
 #endif