Removed the internal thread objects and dispersed its contents to

the thread handler (IDLE), MPCI object (SYSI now MP Receive)
and initialize_executive_early (IO initialization).  The SYSI task
no longer exists in a single processor configuration.  This reduces
single processor Workspace requirements by a TCB and a stack which
is often larger than the minimum stack size.  Moving the IO initialization
plus accompanying BSP hooks eliminated an initialization ordering problem
in which a global task could be created before the MPCI was initialized.

1 files changed, 70 insertions, 0 deletions

diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index 654dddc825..d904df439b 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -161,6 +161,28 @@ typedef struct {
 }   Thread_Control;
 
 /*
+ *  The following constants define the stack size requirements for
+ *  the idle thread.
+ */
+ 
+ 
+#define THREAD_IDLE_STACK_SIZE  STACK_MINIMUM_SIZE
+ 
+/*
+ *  The following defines the information control block used to
+ *  manage this class of objects.
+ */
+ 
+EXTERN Objects_Information _Thread_Internal_information;
+ 
+/*
+ *  The following define the thread control pointers used to access
+ *  and manipulate the idle thread.
+ */
+ 
+EXTERN Thread_Control *_Thread_Idle;
+
+/*
  *  The following context area contains the context of the "thread"
  *  which invoked the start multitasking routine.  This context is 
  *  restored as the last action of the stop multitasking routine.  Thus
@@ -238,6 +260,18 @@ void _Thread_Handler_initialization (
 );
 
 /*
+ *  _Thread_Create_idle
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine creates the idle thread.
+ *
+ *  WARNING!! No thread should be created before this one.
+ */
+ 
+void _Thread_Create_idle( void );
+
+/*
  *  _Thread_Start_multitasking
  *
  *  DESCRIPTION:
@@ -756,6 +790,42 @@ STATIC INLINE boolean _Thread_Is_proxy_blocking (
   unsigned32 code
 );
 
+/*
+ *  _Thread_Internal_allocate
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine allocates an internal thread.
+ */
+ 
+STATIC INLINE Thread_Control *_Thread_Internal_allocate( void );
+ 
+/*
+ *  _Thread_Internal_free
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine frees an internal thread.
+ */
+ 
+STATIC INLINE void _Thread_Internal_free (
+  Thread_Control *the_task
+);
+
+/*
+ *  _Thread_Idle_body
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine is the body of the system idle thread.
+ */
+ 
+#if (CPU_PROVIDES_IDLE_THREAD_BODY == FALSE)
+Thread _Thread_Idle_body(
+  unsigned32 ignored
+);
+#endif
+
 #include <rtems/score/thread.inl>
 #include <rtems/score/threadmp.h>