forked from Imagelibrary/rtems
32caf25fbf
* score/include/rtems/score/isr.h, score/src/isr.c: Use CPU_SIMPLE_VECTORED_INTERRUPTS porting parameter to avoid allocating memory for vector table.
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/*
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* ISR Handler
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*
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/system.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/stack.h>
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#include <rtems/score/interr.h>
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#include <rtems/score/wkspace.h>
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#include <rtems/config.h>
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/* _ISR_Handler_initialization
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*
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* This routine initializes the ISR handler.
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*
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* Input parameters: NONE
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*
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* Output parameters: NONE
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*/
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void _ISR_Handler_initialization( void )
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{
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_ISR_Signals_to_thread_executing = FALSE;
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_ISR_Nest_level = 0;
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#if (CPU_SIMPLE_VECTORED_INTERRUPTS == TRUE)
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_ISR_Vector_table = _Workspace_Allocate_or_fatal_error(
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sizeof(ISR_Handler_entry) * ISR_NUMBER_OF_VECTORS
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);
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#endif
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_CPU_Initialize_vectors();
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#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
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if ( _Configuration_Table->interrupt_stack_size < STACK_MINIMUM_SIZE )
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_Internal_error_Occurred(
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INTERNAL_ERROR_CORE,
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TRUE,
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INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL
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);
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_CPU_Interrupt_stack_low = _Workspace_Allocate_or_fatal_error(
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_Configuration_Table->interrupt_stack_size
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);
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_CPU_Interrupt_stack_high = _Addresses_Add_offset(
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_CPU_Interrupt_stack_low,
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_Configuration_Table->interrupt_stack_size
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);
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#endif
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#if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE )
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_CPU_Install_interrupt_stack();
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#endif
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}
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