[rtems commit] score: Add _SMP_Online_processors

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    b3a4c48ebd1d4cd04dd4390844df840a1c0b9dea
Changeset: http://git.rtems.org/rtems/commit/?id=b3a4c48ebd1d4cd04dd4390844df840a1c0b9dea

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Wed Feb 17 14:27:09 2016 +0100

score: Add _SMP_Online_processors

---

 cpukit/score/include/rtems/score/smpimpl.h | 11 +++++++++++
 cpukit/score/src/smp.c                     |  5 ++++-
 testsuites/smptests/smpipi01/init.c        | 10 ++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/cpukit/score/include/rtems/score/smpimpl.h b/cpukit/score/include/rtems/score/smpimpl.h
index 09c47ec..386216f 100644
--- a/cpukit/score/include/rtems/score/smpimpl.h
+++ b/cpukit/score/include/rtems/score/smpimpl.h
@@ -20,6 +20,7 @@
 
 #include <rtems/score/smp.h>
 #include <rtems/score/percpu.h>
+#include <rtems/score/processormask.h>
 #include <rtems/fatal.h>
 #include <rtems/rtems/cache.h>
 
@@ -91,6 +92,16 @@ static inline void _SMP_Fatal( SMP_Fatal_code code )
 #if defined( RTEMS_SMP )
 
 /**
+ * @brief Set of online processors.
+ *
+ * A processor is online if was started during system initialization.  In this
+ * case its corresponding bit in the mask is set.
+ *
+ * @see _SMP_Handler_initialize().
+ */
+extern Processor_mask _SMP_Online_processors;
+
+/**
  * @brief Performs high-level initialization of a secondary processor and runs
  * the application threads.
  *
diff --git a/cpukit/score/src/smp.c b/cpukit/score/src/smp.c
index b2713f1..68a55ff 100644
--- a/cpukit/score/src/smp.c
+++ b/cpukit/score/src/smp.c
@@ -29,6 +29,8 @@
   #error "deferred FP switch not implemented for SMP"
 #endif
 
+Processor_mask _SMP_Online_processors;
+
 uint32_t _SMP_Processor_count;
 
 static void _SMP_Start_processors( uint32_t cpu_count )
@@ -36,7 +38,6 @@ static void _SMP_Start_processors( uint32_t cpu_count )
   uint32_t cpu_index_self = _SMP_Get_current_processor();
   uint32_t cpu_index;
 
-
   for ( cpu_index = 0 ; cpu_index < cpu_count; ++cpu_index ) {
     const Scheduler_Assignment *assignment =
       _Scheduler_Get_assignment( cpu_index );
@@ -69,6 +70,8 @@ static void _SMP_Start_processors( uint32_t cpu_count )
 
       ++context->processor_count;
       cpu->scheduler_context = context;
+
+      _Processor_mask_Set( _SMP_Online_processors, cpu_index );
     }
   }
 }
diff --git a/testsuites/smptests/smpipi01/init.c b/testsuites/smptests/smpipi01/init.c
index db0688c..8c39d18 100644
--- a/testsuites/smptests/smpipi01/init.c
+++ b/testsuites/smptests/smpipi01/init.c
@@ -161,6 +161,10 @@ static void test_send_message_flood(
   }
 
   for (cpu_index = 0; cpu_index < cpu_count; ++cpu_index) {
+    rtems_test_assert(
+      _Processor_mask_Is_set(_SMP_Online_processors, cpu_index)
+    );
+
     printf(
       "inter-processor interrupts for processor %"
         PRIu32 "%s: %" PRIu32 "\n",
@@ -169,6 +173,12 @@ static void test_send_message_flood(
       ctx->counters[cpu_index].value
     );
   }
+
+  for (; cpu_index < CPU_COUNT; ++cpu_index) {
+    rtems_test_assert(
+      !_Processor_mask_Is_set(_SMP_Online_processors, cpu_index)
+    );
+  }
 }
 
 static void test(void)