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