score: Create idle threads via linker set

This allows a more fine grained rtems_initialize_data_structures().

Update #2408.

3 files changed, 19 insertions, 15 deletions

diff --git a/cpukit/sapi/src/exinit.c b/cpukit/sapi/src/exinit.c
index 7c1ffd65ec..faaf283a30 100644
--- a/cpukit/sapi/src/exinit.c
+++ b/cpukit/sapi/src/exinit.c
@@ -142,21 +142,6 @@ static void rtems_initialize_data_structures(void)
   _Extension_Manager_initialization();
 
   _POSIX_API_Initialize();
-
-  _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING );
-
-  /*
-   *  No threads should be created before this point!!!
-   *  _Thread_Executing and _Thread_Heir are not set.
-   *
-   *  At this point all API extensions are in place.  After the call to
-   *  _Thread_Create_idle() _Thread_Executing and _Thread_Heir will be set.
-   */
-  _Thread_Create_idle();
-
-  /*
-   *  Scheduling can properly occur now as long as we avoid dispatching.
-   */
 }
 
 static void rtems_initialize_before_drivers(void)
@@ -261,6 +246,21 @@ RTEMS_SYSINIT_ITEM(
   RTEMS_SYSINIT_ORDER_MIDDLE
 );
 
+/*
+ *  No threads should be created before this point!!!
+ *  _Thread_Executing and _Thread_Heir are not set.
+ *
+ *  At this point all API extensions are in place.  After the call to
+ *  _Thread_Create_idle() _Thread_Executing and _Thread_Heir will be set.
+ *
+ *  Scheduling can properly occur afterwards as long as we avoid dispatching.
+ */
+RTEMS_SYSINIT_ITEM(
+  _Thread_Create_idle,
+  RTEMS_SYSINIT_IDLE_THREADS,
+  RTEMS_SYSINIT_ORDER_MIDDLE
+);
+
 RTEMS_SYSINIT_ITEM(
   rtems_initialize_before_drivers,
   RTEMS_SYSINIT_BEFORE_DRIVERS,
diff --git a/cpukit/score/include/rtems/sysinit.h b/cpukit/score/include/rtems/sysinit.h
index 855198d4d8..e6fe62f230 100644
--- a/cpukit/score/include/rtems/sysinit.h
+++ b/cpukit/score/include/rtems/sysinit.h
@@ -29,6 +29,7 @@ extern "C" {
 #define RTEMS_SYSINIT_BSP_WORK_AREAS             000100
 #define RTEMS_SYSINIT_BSP_START                  000200
 #define RTEMS_SYSINIT_DATA_STRUCTURES            000300
+#define RTEMS_SYSINIT_IDLE_THREADS               000380
 #define RTEMS_SYSINIT_BSP_LIBC                   000400
 #define RTEMS_SYSINIT_BEFORE_DRIVERS             000500
 #define RTEMS_SYSINIT_BSP_PRE_DRIVERS            000600
diff --git a/cpukit/score/src/threadcreateidle.c b/cpukit/score/src/threadcreateidle.c
index 3430881f39..a07e238293 100644
--- a/cpukit/score/src/threadcreateidle.c
+++ b/cpukit/score/src/threadcreateidle.c
@@ -21,6 +21,7 @@
 #include <rtems/score/threadimpl.h>
 #include <rtems/score/schedulerimpl.h>
 #include <rtems/score/stackimpl.h>
+#include <rtems/score/sysstate.h>
 #include <rtems/score/userextimpl.h>
 #include <rtems/config.h>
 
@@ -84,6 +85,8 @@ void _Thread_Create_idle( void )
   uint32_t cpu_count = _SMP_Get_processor_count();
   uint32_t cpu_index;
 
+  _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING );
+
   for ( cpu_index = 0 ; cpu_index < cpu_count ; ++cpu_index ) {
     Per_CPU_Control *cpu = _Per_CPU_Get_by_index( cpu_index );