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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-05-02 15:47:57 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-05-05 08:32:58 +0200 |
| commit | 4d906bdac2bc1ce2420ff58958884a40f3657d0f (patch) | |
| tree | 2ba9d187ea14e57abb7e3cf7d5d11ba81d9fca47 /cpukit/score/include/rtems/score/smpimpl.h | |
| parent | score: Add SMP test message handler (diff) | |
| download | rtems-4d906bdac2bc1ce2420ff58958884a40f3657d0f.tar.bz2 | |
score: Use atomic operations for SMP messages
Diffstat (limited to 'cpukit/score/include/rtems/score/smpimpl.h')
| -rw-r--r-- | cpukit/score/include/rtems/score/smpimpl.h | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/cpukit/score/include/rtems/score/smpimpl.h b/cpukit/score/include/rtems/score/smpimpl.h index 1868546996..ac04833aa7 100644 --- a/cpukit/score/include/rtems/score/smpimpl.h +++ b/cpukit/score/include/rtems/score/smpimpl.h @@ -41,14 +41,14 @@ extern "C" { * * @see _SMP_Send_message(). */ -#define SMP_MESSAGE_SHUTDOWN UINT32_C(0x1) +#define SMP_MESSAGE_SHUTDOWN 0x1UL /** * @brief SMP message to request a test handler invocation. * * @see _SMP_Send_message(). */ -#define SMP_MESSAGE_TEST UINT32_C(0x2) +#define SMP_MESSAGE_TEST 0x2UL /** * @brief SMP fatal codes. @@ -132,14 +132,12 @@ static inline void _SMP_Inter_processor_interrupt_handler( void ) { Per_CPU_Control *cpu_self = _Per_CPU_Get(); - if ( cpu_self->message != 0 ) { - uint32_t message; - ISR_Level level; - - _Per_CPU_ISR_disable_and_acquire( cpu_self, level ); - message = cpu_self->message; - cpu_self->message = 0; - _Per_CPU_Release_and_ISR_enable( cpu_self, level ); + if ( _Atomic_Load_ulong( &cpu_self->message, ATOMIC_ORDER_RELAXED ) != 0 ) { + unsigned long message = _Atomic_Exchange_ulong( + &cpu_self->message, + 0UL, + ATOMIC_ORDER_RELAXED + ); if ( ( message & SMP_MESSAGE_SHUTDOWN ) != 0 ) { rtems_fatal( RTEMS_FATAL_SOURCE_SMP, SMP_FATAL_SHUTDOWN ); @@ -160,7 +158,7 @@ static inline void _SMP_Inter_processor_interrupt_handler( void ) * @param[in] cpu_index The target processor of the message. * @param[in] message The message. */ -void _SMP_Send_message( uint32_t cpu_index, uint32_t message ); +void _SMP_Send_message( uint32_t cpu_index, unsigned long message ); /** * @brief Request of others CPUs. |