/****************************************************************************
* arch/arm/irq/up_ramvec_attach.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include "ram_vectors.h"
#ifdef CONFIG_ARCH_RAMVECTORS
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Global Variables
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/* Common exception entrypoint */
void exception_common(void);
/****************************************************************************
* Name: up_ramvec_attach
*
* Description:
* Configure the ram vector table so that IRQ number 'irq' will be
* dipatched by hardware to 'vector'
*
****************************************************************************/
int up_ramvec_attach(int irq, up_vector_t vector)
{
int ret = ERROR;
if ((unsigned)irq < ARMV7M_PERIPHERAL_INTERRUPTS)
{
irqstate_t flags;
/* If the new vector is NULL, then the vector is being detached. In
* this case, disable the itnerrupt and direct any interrupts to the
* common exception handler.
*/
flags = irqsave();
if (vector == NULL)
{
/* Disable the interrupt if we can before detaching it. We might
* not be able to do this for all interrupts.
*/
up_disable_irq(irq);
/* Detaching the vector really means re-attaching it to the
* common exception handler.
*/
vector = exception_common;
}
/* Save the new vector in the vector table. */
g_ram_vectors[irq] = vector;
irqrestore(flags);
ret = OK;
}
return ret;
}
#endif /* !CONFIG_ARCH_RAMVECTORS */
