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/*
* Support for SuperH Simulator in GDB
*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/cpu.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/sh.h>
#if (CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE)
unsigned long *_old_stack_ptr;
#endif
register unsigned long *stack_ptr __asm__ ("r15");
/*
* This routine provides the RTEMS interrupt management.
*/
void __ISR_Handler( uint32_t vector)
{
ISR_Level level;
_ISR_Disable( level );
_Thread_Dispatch_increment_disable_level();
#if (CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE)
if ( _ISR_Nest_level == 0 )
{
/* Install irq stack */
_old_stack_ptr = stack_ptr;
stack_ptr = _CPU_Interrupt_stack_high;
}
#endif
_ISR_Nest_level++;
_ISR_Enable( level );
/* call isp */
if ( _ISR_Vector_table[ vector])
(*_ISR_Vector_table[ vector ])( vector );
_ISR_Disable( level );
_Thread_Dispatch_decrement_disable_level();
_ISR_Nest_level--;
#if (CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE)
if ( _ISR_Nest_level == 0 )
/* restore old stack pointer */
stack_ptr = _old_stack_ptr;
#endif
_ISR_Enable( level );
if ( _ISR_Nest_level )
return;
if ( _Thread_Dispatch_in_critical_section() ) {
return;
}
if ( _Thread_Dispatch_necessary ) {
_Thread_Dispatch();
}
}
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