/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicIntr
*
* @brief LPC176X interrupt support.
*/
/*
* Copyright (C) 2008, 2012 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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;
}