forked from Imagelibrary/rtems
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/**
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* @file
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*
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* @ingroup bsp_interrupt
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*
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* @brief LPC176X interrupt support.
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*/
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/*
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* Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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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.org/license/LICENSE.
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*/
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#include <rtems/score/armv4.h>
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#include <rtems/score/armv7m.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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#include <bsp/irq-generic.h>
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#include <bsp/lpc176x.h>
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#include <bsp/linker-symbols.h>
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/**
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* @brief Checks if the current interrupt vector length is valid or not.
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*
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* @param vector The current interrupt vector length.
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* @return TRUE if valid.
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* FALSE otherwise.
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*/
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static inline bool lpc176x_irq_is_valid( const rtems_vector_number vector )
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{
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return vector <= BSP_INTERRUPT_VECTOR_MAX;
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}
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void lpc176x_irq_set_priority(
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const rtems_vector_number vector,
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unsigned priority
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)
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{
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if ( lpc176x_irq_is_valid( vector ) ) {
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if ( priority > LPC176X_IRQ_PRIORITY_VALUE_MAX ) {
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priority = LPC176X_IRQ_PRIORITY_VALUE_MAX;
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}
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/* else implies that the priority is unlocked. Also,
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there is nothing to do. */
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_ARMV7M_NVIC_Set_priority( (int) vector, (int) ( priority << 3u ) );
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}
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/* else implies that the rtems vector number is invalid. Also,
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there is nothing to do. */
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}
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unsigned lpc176x_irq_get_priority( const rtems_vector_number vector )
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{
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unsigned priority;
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if ( lpc176x_irq_is_valid( vector ) ) {
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priority = (unsigned) ( _ARMV7M_NVIC_Get_priority( (int) vector ) >> 3u );
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} else {
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priority = LPC176X_IRQ_PRIORITY_VALUE_MIN - 1u;
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}
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return priority;
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}
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