From 85817254348c558ec99a5c0499f16839802165e5 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Mon, 5 Aug 2013 14:25:41 +0200
Subject: score: Add and use _Per_CPU_Acquire_all().

Add and use _Per_CPU_Release_all().

The context switch user extensions are invoked in _Thread_Dispatch().
This change is necessary to avoid the giant lock in _Thread_Dispatch().
---
 cpukit/score/include/rtems/score/percpu.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'cpukit/score/include/rtems/score/percpu.h')

diff --git a/cpukit/score/include/rtems/score/percpu.h b/cpukit/score/include/rtems/score/percpu.h
index 6e3a18e6db..7a4c70e646 100644
--- a/cpukit/score/include/rtems/score/percpu.h
+++ b/cpukit/score/include/rtems/score/percpu.h
@@ -234,6 +234,36 @@ extern Per_CPU_Control_envelope _Per_CPU_Information[] CPU_STRUCTURE_ALIGNMENT;
 #define _Per_CPU_Release( per_cpu ) \
   _ISR_lock_Release( &( per_cpu )->lock )
 
+#if defined( RTEMS_SMP )
+#define _Per_CPU_Acquire_all( isr_cookie ) \
+  do { \
+    uint32_t ncpus = _SMP_Get_processor_count(); \
+    uint32_t cpu; \
+    _ISR_Disable( isr_cookie ); \
+    for ( cpu = 0 ; cpu < ncpus ; ++cpu ) { \
+      _Per_CPU_Acquire( _Per_CPU_Get_by_index( cpu ) ); \
+    } \
+  } while ( 0 )
+#else
+#define _Per_CPU_Acquire_all( isr_cookie ) \
+  _ISR_Disable( isr_cookie )
+#endif
+
+#if defined( RTEMS_SMP )
+#define _Per_CPU_Release_all( isr_cookie ) \
+  do { \
+    uint32_t ncpus = _SMP_Get_processor_count(); \
+    uint32_t cpu; \
+    for ( cpu = 0 ; cpu < ncpus ; ++cpu ) { \
+      _Per_CPU_Release( _Per_CPU_Get_by_index( cpu ) ); \
+    } \
+    _ISR_Enable( isr_cookie ); \
+  } while ( 0 )
+#else
+#define _Per_CPU_Release_all( isr_cookie ) \
+  _ISR_Enable( isr_cookie )
+#endif
+
 #if defined( RTEMS_SMP )
 static inline Per_CPU_Control *_Per_CPU_Get( void )
 {
-- 
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