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/****************************************************************************
* arch/arm/src/imx1/imx_irq.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 <stdint.h>
#include <arch/irq.h>
#include "chip.h"
#include "arm_internal.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_irqinitialize
****************************************************************************/
void up_irqinitialize(void)
{
/* Clear, disable and configure all interrupts. */
putreg32(0, IMX_AITC_INTENABLEH);
putreg32(0, IMX_AITC_INTENABLEL);
/* Set masking of normal interrupts by priority. Writing all ones
* (or -1) to the NIMASK register sets the normal interrupt mask to
* -1 and does not disable any normal interrupt priority levels.
*/
#ifndef CONFIG_SUPPRESS_INTERRUPTS
putreg32(-1, IMX_AITC_NIMASK); /* -1: No priority levels masked */
/* Initialize FIQs */
#ifdef CONFIG_ARCH_FIQ
up_fiqinitialize();
#endif
/* And finally, enable interrupts */
up_irq_restore(PSR_MODE_SYS | PSR_F_BIT);
#endif
}
/****************************************************************************
* Name: up_disable_irq
*
* Description:
* Disable the IRQ specified by 'irq'
*
****************************************************************************/
void up_disable_irq(int irq)
{
putreg32(irq, IMX_AITC_INTDISNUM);
}
/****************************************************************************
* Name: up_enable_irq
*
* Description:
* Enable the IRQ specified by 'irq'
*
****************************************************************************/
void up_enable_irq(int irq)
{
putreg32(irq, IMX_AITC_INTENNUM);
}