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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2015-09-25 14:34:24 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2015-09-28 13:56:57 +0200 |
| commit | 258ad71e9626c16f30b40e06c321326636c976ff (patch) | |
| tree | da6e210947d590159796434bf04cf364247ac20a /c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c | |
| parent | SMP: Simplify thread lock operations (diff) | |
| download | rtems-258ad71e9626c16f30b40e06c321326636c976ff.tar.bz2 | |
SMP: Fix and optimize thread dispatching
According to the C11 and C++11 memory models only a read-modify-write
operation guarantees that we read the last value written in modification
order. Avoid the sequential consistent thread fence and instead use the
inter-processor interrupt to set the thread dispatch necessary
indicator.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c b/c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c index 0b0743b35e..8952d3e809 100644 --- a/c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c +++ b/c/src/lib/libbsp/powerpc/qoriq/startup/bspsmp.c @@ -235,5 +235,10 @@ void _CPU_SMP_Prepare_start_multitasking(void) void _CPU_SMP_Send_interrupt(uint32_t target_processor_index) { +#ifdef __PPC_CPU_E6500__ + ppc_light_weight_synchronize(); +#else + ppc_synchronize_data(); +#endif qoriq.pic.ipidr [IPI_INDEX].reg = 1U << target_processor_index; } |