score: _Per_CPU_State_wait_for_non_initial_state()

Replace _Per_CPU_State_wait_for_ready_to_start_multitasking() with
_Per_CPU_State_wait_for_non_initial_state().  Implement this function.

1 files changed, 56 insertions, 0 deletions

diff --git a/cpukit/score/src/percpustatewait.c b/cpukit/score/src/percpustatewait.c
new file mode 100644
index 0000000000..bde367b698
--- /dev/null
+++ b/cpukit/score/src/percpustatewait.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/score/percpu.h>
+#include <rtems/counter.h>
+
+bool _Per_CPU_State_wait_for_non_initial_state(
+  uint32_t cpu_index,
+  uint32_t timeout_in_ns
+)
+{
+  const Per_CPU_Control *cpu = _Per_CPU_Get_by_index( cpu_index );
+  Per_CPU_State state = cpu->state;
+
+  if ( timeout_in_ns > 0 ) {
+    rtems_counter_ticks ticks =
+      rtems_counter_nanoseconds_to_ticks( timeout_in_ns );
+    rtems_counter_ticks a = rtems_counter_read();
+    rtems_counter_ticks delta = 0;
+
+    while ( ticks > delta && state == PER_CPU_STATE_INITIAL ) {
+      rtems_counter_ticks b;
+
+      _CPU_SMP_Processor_event_receive();
+      state = cpu->state;
+
+      ticks -= delta;
+
+      b = rtems_counter_read();
+      delta = rtems_counter_difference( b, a );
+      a = b;
+    }
+  } else {
+    while ( state == PER_CPU_STATE_INITIAL ) {
+      _CPU_SMP_Processor_event_receive();
+      state = cpu->state;
+    }
+  }
+
+  return state != PER_CPU_STATE_INITIAL;
+}