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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Support for SuperH Simulator in GDB
*/
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <rtems/score/cpu.h>
#include <rtems/score/isr.h>
#include <rtems/score/percpu.h>
#include <rtems/score/threaddispatch.h>
#include <rtems/score/sh.h>
unsigned long *_old_stack_ptr;
register unsigned long *stack_ptr __asm__ ("r15");
void __ISR_Handler(uint32_t vector);
/*
* This routine provides the RTEMS interrupt management.
*/
void __ISR_Handler( uint32_t vector)
{
ISR_Level level;
_ISR_Local_disable( level );
_Thread_Dispatch_disable();
if ( _ISR_Nest_level == 0 )
{
/* Install irq stack */
_old_stack_ptr = stack_ptr;
stack_ptr = _CPU_Interrupt_stack_high;
}
_ISR_Nest_level++;
_ISR_Local_enable( level );
/* call isp */
if ( _ISR_Vector_table[ vector])
(*_ISR_Vector_table[ vector ])( vector );
_ISR_Local_disable( level );
_Thread_Dispatch_unnest( _Per_CPU_Get() );
_ISR_Nest_level--;
if ( _ISR_Nest_level == 0 )
/* restore old stack pointer */
stack_ptr = _old_stack_ptr;
_ISR_Local_enable( level );
if ( _ISR_Nest_level )
return;
if ( !_Thread_Dispatch_is_enabled() ) {
return;
}
if ( _Thread_Dispatch_necessary ) {
_Thread_Dispatch();
}
}
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