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/**
* @file
*
* ISR Handler Initialization
*/
/*
* COPYRIGHT (c) 1989-2012.
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/stack.h>
#include <rtems/score/interr.h>
#include <rtems/score/wkspace.h>
#include <rtems/config.h>
/* _ISR_Handler_initialization
*
* This routine initializes the ISR handler.
*
* Input parameters: NONE
*
* Output parameters: NONE
*/
void _ISR_Handler_initialization( void )
{
_ISR_Nest_level = 0;
#if (CPU_SIMPLE_VECTORED_INTERRUPTS == TRUE)
_ISR_Vector_table = _Workspace_Allocate_or_fatal_error(
sizeof(ISR_Handler_entry) * ISR_NUMBER_OF_VECTORS
);
_CPU_Initialize_vectors();
#endif
#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
if ( !_Stack_Is_enough(Configuration.interrupt_stack_size) )
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL
);
_CPU_Interrupt_stack_low = _Workspace_Allocate_or_fatal_error(
Configuration.interrupt_stack_size
);
_CPU_Interrupt_stack_high = _Addresses_Add_offset(
_CPU_Interrupt_stack_low,
Configuration.interrupt_stack_size
);
#if (CPU_STACK_ALIGNMENT != 0)
_CPU_Interrupt_stack_high = (void *)
((uintptr_t) _CPU_Interrupt_stack_high & ~(CPU_STACK_ALIGNMENT - 1));
#endif
/* Interrupt stack might have to be aligned and/or setup
* in a specific way.
*/
#if defined(_CPU_Interrupt_stack_setup)
_CPU_Interrupt_stack_setup(_CPU_Interrupt_stack_low, _CPU_Interrupt_stack_high);
#endif
#endif
#if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE )
_CPU_Install_interrupt_stack();
#endif
#if defined(RTEMS_SMP)
_ISR_SMP_Initialize();
#endif
}
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