/*
 * Atmel AT91RM9200 Interrupt handler
 *
 * Copyright (c) 2010 embedded brains GmbH.
 *
 * Copyright (c) 2004 by Jay Monkman <jtm@lopingdog.com>
 *
 *  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 <bsp.h>
#include <bsp/irq.h>
#include <bsp/irq-generic.h>

#include <at91rm9200.h>

void bsp_interrupt_dispatch(void)
{
  rtems_vector_number vector = AIC_CTL_REG(AIC_IVR);

  bsp_interrupt_handler_dispatch(vector);

  AIC_CTL_REG(AIC_EOICR) = 0;
}

rtems_status_code bsp_interrupt_get_attributes(
  rtems_vector_number         vector,
  rtems_interrupt_attributes *attributes
)
{
  return RTEMS_SUCCESSFUL;
}

rtems_status_code bsp_interrupt_is_pending(
  rtems_vector_number vector,
  bool               *pending
)
{
  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
  bsp_interrupt_assert(pending != NULL);
  *pending = false;
  return RTEMS_UNSATISFIED;
}

rtems_status_code bsp_interrupt_raise(rtems_vector_number vector)
{
  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
  return RTEMS_UNSATISFIED;
}

rtems_status_code bsp_interrupt_clear(rtems_vector_number vector)
{
  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
  return RTEMS_UNSATISFIED;
}

rtems_status_code bsp_interrupt_vector_is_enabled(
  rtems_vector_number vector,
  bool               *enabled
)
{
  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
  bsp_interrupt_assert(enabled != NULL);
  *enabled = false;
  return RTEMS_UNSATISFIED;
}

rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
{
  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
  AIC_CTL_REG(AIC_IECR) = 1 << vector;
  return RTEMS_SUCCESSFUL;
}

rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
{
  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
  AIC_CTL_REG(AIC_IDCR) = 1 << vector;
  return RTEMS_SUCCESSFUL;
}

void bsp_interrupt_facility_initialize(void)
{
  unsigned long i = 0;

  for (i = 0; i < 32; ++i) {
    AIC_SVR_REG(i<<2) = i;
  }

  /* disable all interrupts */
  AIC_CTL_REG(AIC_IDCR) = 0xffffffff;

  _CPU_ISR_install_vector(ARM_EXCEPTION_IRQ, _ARMV4_Exception_interrupt, NULL);
}