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/**
* @file
*
* @brief Initialize the ISR handler
* @ingroup ScoreISR
*/
/*
* 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.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/isr.h>
#include <rtems/score/address.h>
#include <rtems/score/interr.h>
#include <rtems/score/percpu.h>
#include <rtems/score/stackimpl.h>
#include <rtems/score/wkspace.h>
#include <rtems/config.h>
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 )
{
size_t stack_size = rtems_configuration_get_interrupt_stack_size();
uint32_t max_cpus = rtems_configuration_get_maximum_processors();
uint32_t cpu;
if ( !_Stack_Is_enough( stack_size ) )
_Terminate(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL
);
for ( cpu = 0 ; cpu < max_cpus; ++cpu ) {
Per_CPU_Control *per_cpu = _Per_CPU_Get_by_index( cpu );
void *low = _Workspace_Allocate_or_fatal_error( stack_size );
void *high = _Addresses_Add_offset( low, stack_size );
#if (CPU_STACK_ALIGNMENT != 0)
high = _Addresses_Align_down( high, CPU_STACK_ALIGNMENT );
#endif
per_cpu->interrupt_stack_low = low;
per_cpu->interrupt_stack_high = high;
/*
* Interrupt stack might have to be aligned and/or setup in a specific
* way. Do not use the local low or high variables here since
* _CPU_Interrupt_stack_setup() is a nasty macro that might want to play
* with the real memory locations.
*/
#if defined(_CPU_Interrupt_stack_setup)
_CPU_Interrupt_stack_setup(
per_cpu->interrupt_stack_low,
per_cpu->interrupt_stack_high
);
#endif
}
}
#endif
#if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE )
_CPU_Install_interrupt_stack();
#endif
}
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