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/*
* ISR Handler
*
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/stack.h>
#include <rtems/score/interr.h>
#include <rtems/score/wkspace.h>
/* _ISR_Handler_initialization
*
* This routine initializes the ISR handler.
*
* Input parameters: NONE
*
* Output parameters: NONE
*/
void _ISR_Handler_initialization( void )
{
_ISR_Signals_to_thread_executing = FALSE;
_ISR_Nest_level = 0;
#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
if ( _CPU_Table.interrupt_stack_size < STACK_MINIMUM_SIZE )
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
TRUE,
INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL
);
_CPU_Interrupt_stack_low =
_Workspace_Allocate_or_fatal_error( _CPU_Table.interrupt_stack_size );
_CPU_Interrupt_stack_high = _Addresses_Add_offset(
_CPU_Interrupt_stack_low,
_CPU_Table.interrupt_stack_size
);
#endif
#if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE )
_CPU_Install_interrupt_stack();
#endif
}
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