scheduler: Add start idle thread operation

Add and use _Scheduler_Start_idle().

6 files changed, 30 insertions, 5 deletions

diff --git a/cpukit/score/include/rtems/score/scheduler.h b/cpukit/score/include/rtems/score/scheduler.h
index 5c35a36de1..9e08b23e4f 100644
--- a/cpukit/score/include/rtems/score/scheduler.h
+++ b/cpukit/score/include/rtems/score/scheduler.h
@@ -89,6 +89,12 @@ typedef struct {
   /** perform scheduler update actions required at each clock tick */
   void ( *tick )(void);
 
+  /**
+   * @brief Starts the idle thread for a particular processor.
+   *
+   * @see _Scheduler_Start_idle().
+   */
+  void ( *start_idle )( Thread_Control *thread, Per_CPU_Control *processor );
 } Scheduler_Operations;
 
 /**
@@ -139,6 +145,17 @@ extern Scheduler_Control  _Scheduler;
  */
 void _Scheduler_Handler_initialization( void );
 
+/**
+ * @brief Unblocks the thread.
+ *
+ * @param[in/out] thread An idle thread.
+ * @param[in] processor This parameter is unused.
+ */
+void _Scheduler_default_Start_idle(
+  Thread_Control  *thread,
+  Per_CPU_Control *processor
+);
+
 #ifndef __RTEMS_APPLICATION__
 #include <rtems/score/scheduler.inl>
 #endif
diff --git a/cpukit/score/include/rtems/score/schedulercbs.h b/cpukit/score/include/rtems/score/schedulercbs.h
index 53452e044a..41f8ab0b57 100644
--- a/cpukit/score/include/rtems/score/schedulercbs.h
+++ b/cpukit/score/include/rtems/score/schedulercbs.h
@@ -60,7 +60,8 @@ extern "C" {
     _Scheduler_EDF_Extract,          /* extract entry point */ \
     _Scheduler_EDF_Priority_compare, /* compares two priorities */ \
     _Scheduler_CBS_Release_job,      /* new period of task */ \
-    _Scheduler_priority_Tick         /* tick entry point */ \
+    _Scheduler_priority_Tick,        /* tick entry point */ \
+    _Scheduler_default_Start_idle    /* start idle entry point */ \
   }
 
 /* Return values for CBS server. */
diff --git a/cpukit/score/include/rtems/score/scheduleredf.h b/cpukit/score/include/rtems/score/scheduleredf.h
index 24f9a1ac32..e84b3f5909 100644
--- a/cpukit/score/include/rtems/score/scheduleredf.h
+++ b/cpukit/score/include/rtems/score/scheduleredf.h
@@ -53,7 +53,8 @@ extern "C" {
     _Scheduler_EDF_Extract,          /* extract entry point */ \
     _Scheduler_EDF_Priority_compare, /* compares two priorities */ \
     _Scheduler_EDF_Release_job,      /* new period of task */ \
-    _Scheduler_priority_Tick         /* tick entry point */ \
+    _Scheduler_priority_Tick,        /* tick entry point */ \
+    _Scheduler_default_Start_idle    /* start idle entry point */ \
   }
 
 /**
diff --git a/cpukit/score/include/rtems/score/schedulerpriority.h b/cpukit/score/include/rtems/score/schedulerpriority.h
index f97bb7f075..81c3582e76 100644
--- a/cpukit/score/include/rtems/score/schedulerpriority.h
+++ b/cpukit/score/include/rtems/score/schedulerpriority.h
@@ -52,7 +52,8 @@ extern "C" {
     _Scheduler_priority_Extract,          /* extract entry point */ \
     _Scheduler_priority_Priority_compare, /* compares two priorities */ \
     _Scheduler_priority_Release_job,      /* new period of task */ \
-    _Scheduler_priority_Tick              /* tick entry point */ \
+    _Scheduler_priority_Tick,             /* tick entry point */ \
+    _Scheduler_default_Start_idle         /* start idle entry point */ \
   }
 
 /**
diff --git a/cpukit/score/include/rtems/score/schedulersimple.h b/cpukit/score/include/rtems/score/schedulersimple.h
index df52a586be..6682074b7c 100644
--- a/cpukit/score/include/rtems/score/schedulersimple.h
+++ b/cpukit/score/include/rtems/score/schedulersimple.h
@@ -50,7 +50,8 @@ extern "C" {
     _Scheduler_simple_Extract,            /* extract entry point */ \
     _Scheduler_priority_Priority_compare, /* compares two priorities */ \
     _Scheduler_priority_Release_job,      /* new period of task */ \
-    _Scheduler_priority_Tick              /* tick entry point */ \
+    _Scheduler_priority_Tick,             /* tick entry point */ \
+    _Scheduler_default_Start_idle         /* start idle entry point */ \
   }
 
 /**
diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index 3cddb5a3e9..60583a77c0 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -571,13 +571,17 @@ bool _Thread_Initialize(
  *  @param entry_point
  *  @param pointer_argument
  *  @param numeric_argument
+ *  @param[in/out] processor The processor if used to start an idle thread
+ *  during system initialization.  Must be set to @c NULL to start a normal
+ *  thread.
  */
 bool _Thread_Start(
   Thread_Control            *the_thread,
   Thread_Start_types         the_prototype,
   void                      *entry_point,
   void                      *pointer_argument,
-  Thread_Entry_numeric_type  numeric_argument
+  Thread_Entry_numeric_type  numeric_argument,
+  Per_CPU_Control           *processor
 );
 
 /**