text: /****************************************************************************
   * arch/arm/src/s32k1xx/s32k14x/s32k14x_clrpend.c
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the
   * License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <arch/irq.h>
  
  #include "nvic.h"
  #include "arm_internal.h"
  #include "s32k14x_irq.h"
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: s32k14x_clrpend
   *
   * Description:
   *   Clear a pending interrupt at the NVIC.  This does not seem to be
   *   required for most interrupts.  Don't know why...
   *   but the S32K14x Ethernet EMAC interrupt definitely needs it!
   *
   *   This function is logically a part of s32k14x_irq.c, but I will keep it
   *   in a separate file so that it will not increase the footprint on S32K14x
   *   platforms that do not need this function.
   *
   ****************************************************************************/
  
  void s32k14x_clrpend(int irq)
  {
    /* Check for external interrupt */
  
    if (irq >= S32K1XX_IRQ_INTERRUPT)
      {
        irq -= S32K1XX_IRQ_INTERRUPT;
        if (irq < 32)
          {
            putreg32(1 << irq , NVIC_IRQ0_31_CLRPEND);
          }
        else if (irq < 64)
          {
            putreg32(1 << (irq - 32), NVIC_IRQ32_63_CLRPEND);
          }
        else if (irq < 96)
          {
            putreg32(1 << (irq - 64), NVIC_IRQ64_95_CLRPEND);
          }
        else if (irq < 128)
          {
            putreg32(1 << (irq - 96), NVIC_IRQ96_127_CLRPEND);
          }
        else if (irq < S32K1XX_IRQ_NIRQS)
          {
            putreg32(1 << (irq - 128), NVIC_IRQ128_159_CLRPEND);
          }
      }
  }
  