2011-05-26 Jennifer Averett <Jennifer.Averett@OARcorp.com>

PR 1796/cpukit
	* sapi/src/exshutdown.c, score/include/rtems/score/percpu.h,
	score/include/rtems/score/smp.h, score/src/smp.c,
	score/src/threaddispatch.c, score/src/threadhandler.c: Added SMP
	interprocess communications.

cpukit/ChangeLog

@@ -1,3 +1,11 @@
+2011-05-26	Jennifer Averett <Jennifer.Averett@OARcorp.com>
+
+	PR 1796/cpukit
+	* sapi/src/exshutdown.c, score/include/rtems/score/percpu.h,
+	score/include/rtems/score/smp.h, score/src/smp.c,
+	score/src/threaddispatch.c, score/src/threadhandler.c: Added SMP
+	interprocess communications.
+
 2011-05-24	Ralf Corsépius <ralf.corsepius@rtems.org>
 
 	* score/include/rtems/score/percpu.h,

cpukit/sapi/src/exshutdown.c

@@ -1,7 +1,7 @@
 /*
  *  Initialization Manager
  *
- *  COPYRIGHT (c) 1989-1999.
+ *  COPYRIGHT (c) 1989-2011.
  *  On-Line Applications Research Corporation (OAR).
  *
  *  The license and distribution terms for this file may be
@@ -20,6 +20,10 @@
 #include <rtems/score/thread.h>
 #include <rtems/score/interr.h>
 
+#if defined(RTEMS_SMP)
+  #include <rtems/score/smp.h>
+#endif
+
 /*
  *  rtems_shutdown_executive
  *
@@ -37,6 +41,9 @@ void rtems_shutdown_executive(
 )
 {
   if ( _System_state_Is_up( _System_state_Get() ) ) {
+    #if defined(RTEMS_SMP)
+      _SMP_Request_other_cores_to_shutdown();
+    #endif
     _System_state_Set( SYSTEM_STATE_SHUTDOWN );
     _Thread_Stop_multitasking();
   }

cpukit/score/include/rtems/score/percpu.h

@@ -77,11 +77,17 @@ typedef enum {
    */
    RTEMS_BSP_SMP_CPU_INITIALIZED = 2,
 
+  /**
+   *  This defines the constant used to indicate that the cpu code has
+   *  completed basic initialization and awaits further commands.
+   */
+  RTEMS_BSP_SMP_CPU_UP = 3,
+
   /**
    *  This defines the constant used to indicate that the cpu code has
    *  shut itself down.
    */
-  RTEMS_BSP_SMP_CPU_SHUTDOWN = 3
+  RTEMS_BSP_SMP_CPU_SHUTDOWN = 4
 } bsp_smp_cpu_state;
 
 /**

cpukit/score/include/rtems/score/smp.h

@@ -86,6 +86,14 @@ void _SMP_Broadcast_message(
   uint32_t  message
 );
 
+/**
+ *  @brief Request Other Cores to Perform First Context Switch
+ *
+ *  Send message to other cores requesting them to perform
+ *  their first context switch operation.
+ */
+void _SMP_Request_other_cores_to_perform_first_context_switch(void);
+
 /**
  *  @brief Request Dispatch on Other Cores
  *

cpukit/score/src/threaddispatch.c

@@ -33,6 +33,10 @@
   #include <rtems/score/timestamp.h>
 #endif
 
+#if defined(RTEMS_SMP)
+  #include <rtems/score/smp.h>
+#endif
+
 /**
  *  _Thread_Dispatch
  *
@@ -47,18 +51,28 @@
  *    dispatch thread
  *    no dispatch thread
  */
-
 void _Thread_Dispatch( void )
 {
   Thread_Control   *executing;
   Thread_Control   *heir;
   ISR_Level         level;
 
+  _Thread_Disable_dispatch();
+  #if defined(RTEMS_SMP)
+    /*
+     *  If necessary, send dispatch request to other cores.
+     */
+    _SMP_Request_other_cores_to_dispatch();
+  #endif
+
+  /*
+   *  Now determine if we need to perform a dispatch on the current CPU.
+   */
   executing   = _Thread_Executing;
   _ISR_Disable( level );
   while ( _Thread_Dispatch_necessary == true ) {
+
     heir = _Thread_Heir;
-   _Thread_Dispatch_set_disable_level( 1 );
     _Thread_Dispatch_necessary = false;
     _Thread_Executing = heir;
 
@@ -96,7 +110,10 @@ void _Thread_Dispatch( void )
         _Thread_Time_of_last_context_switch = uptime;
       }
     #else
-      heir->cpu_time_used++;
+      {
+        TOD_Get_uptime( &_Thread_Time_of_last_context_switch );
+        heir->cpu_time_used++;
+      }
     #endif
 
     /*

cpukit/score/src/threadhandler.c

@@ -2,7 +2,7 @@
  *  Thread Handler
  *
  *
- *  COPYRIGHT (c) 1989-2009.
+ *  COPYRIGHT (c) 1989-2011.
  *  On-Line Applications Research Corporation (OAR).
  *
  *  The license and distribution terms for this file may be
@@ -51,6 +51,11 @@
   #define EXECUTE_GLOBAL_CONSTRUCTORS
 #endif
 
+#if defined(RTEMS_SMP)
+  #include <rtems/score/smp.h>
+#endif
+
+
 /*PAGE
  *
  *  _Thread_Handler
@@ -138,8 +143,15 @@ void _Thread_Handler( void )
      */
     if (!doneCons) /* && (volatile void *)_init) */ {
       INIT_NAME ();
+   
+      #if defined(RTEMS_SMP)
+        _Thread_Disable_dispatch();
+          _SMP_Request_other_cores_to_perform_first_context_switch();
+        _Thread_Enable_dispatch();
+      #endif
+
     }
-  #endif
+ #endif
 
   if ( executing->Start.prototype == THREAD_START_NUMERIC ) {
     executing->Wait.return_argument =