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bsps/powerpc: Fix robust thread dispatch

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Implement thread dispatch code in ppc_exc_wrapup() similar to
ppc_exc_interrupt().

Update #2811.
This commit is contained in:
Sebastian Huber
2017-09-21 13:32:25 +02:00
parent b800f88a63
commit a4bca68586
1 changed files with 21 additions and 6 deletions
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27
c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc_hdl.c
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@@ -93,11 +93,26 @@ rtems_status_code ppc_exc_set_handler(unsigned vector, ppc_exc_handler_t handler
void ppc_exc_wrapup(BSP_Exception_frame *frame) void ppc_exc_wrapup(BSP_Exception_frame *frame)
{ {
/* dispatch_disable level is decremented from assembly code. */ Per_CPU_Control *cpu_self;
if ( _Thread_Dispatch_necessary ) {
/* FIXME: I believe it should be OK to re-enable cpu_self = _Per_CPU_Get();
* interrupts around the execution of _Thread_Dispatch();
*/ if (cpu_self->isr_dispatch_disable) {
_Thread_Dispatch(); return;
} }
while (cpu_self->dispatch_necessary) {
uint32_t msr;
rtems_interrupt_level level;
cpu_self->isr_dispatch_disable = 1;
cpu_self->thread_dispatch_disable_level = 1;
msr = ppc_machine_state_register();
_Thread_Do_dispatch(cpu_self, msr | MSR_EE);
rtems_interrupt_local_disable(level);
(void) level;
cpu_self = _Per_CPU_Get();
}
cpu_self->isr_dispatch_disable = 0;
} }