From 9518a5bc4d41403d2f4d635a6973f3b36b7b4f65 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Tue, 11 Feb 2003 23:29:06 +0000 Subject: 2003-02-11 Joel Sherrill * score/cpu_asm.c: Rework logic that decides when to call _Thread_Dispatch. Analysis by Sergei Organov determined that _ISR_Signals_to_thread_executing was not being honored and/or cleared properly. --- c/src/lib/libcpu/sh/sh7032/score/cpu_asm.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) (limited to 'c/src/lib/libcpu/sh/sh7032/score') diff --git a/c/src/lib/libcpu/sh/sh7032/score/cpu_asm.c b/c/src/lib/libcpu/sh/sh7032/score/cpu_asm.c index b9caadb242..cc94c11693 100644 --- a/c/src/lib/libcpu/sh/sh7032/score/cpu_asm.c +++ b/c/src/lib/libcpu/sh/sh7032/score/cpu_asm.c @@ -287,6 +287,8 @@ void __ISR_Handler( unsigned32 vector) _CPU_ISR_Disable( level ); + _Thread_Dispatch_disable_level--; + _ISR_Nest_level--; #if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE) @@ -296,16 +298,18 @@ void __ISR_Handler( unsigned32 vector) stack_ptr = _old_stack_ptr; #endif - _Thread_Dispatch_disable_level--; - _CPU_ISR_Enable( level ); - if ( _Thread_Dispatch_disable_level == 0 ) - { - if(( _Context_Switch_necessary) || (! _ISR_Signals_to_thread_executing)) - { - _ISR_Signals_to_thread_executing = FALSE; - _Thread_Dispatch(); - } + if ( _ISR_Nest_level ) + return; + + if ( _Thread_Dispatch_disable_level ) { + _ISR_Signals_to_thread_executing = FALSE; + return; + } + + if ( _Context_Switch_necessary || _ISR_Signals_to_thread_executing ) { + _ISR_Signals_to_thread_executing = FALSE; + _Thread_Dispatch(); } } -- cgit v1.2.3