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/*
* RTEMS for Nintendo DS interrupt manager.
*
* Copyright (c) 2008 by Matthieu Bucchianeri <mbucchia@gmail.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.com/license/LICENSE
*
* $Id$
*/
#include <bsp.h>
#include <rtems/irq.h>
#include <nds.h>
/*
* this function check that the value given for the irq line is valid.
*/
static int
isValidInterrupt (int irq)
{
if (irq < 0 || irq >= MAX_INTERRUPTS)
return 0;
return 1;
}
/*
* initialize the irq management.
*/
void
BSP_rtems_irq_mngt_init (void)
{
irqInit ();
REG_IME = IME_ENABLE;
}
/*
* install a irq handler.
*/
int
BSP_install_rtems_irq_handler (const rtems_irq_connect_data * irq)
{
rtems_interrupt_level level;
if (!isValidInterrupt (irq->name))
return 0;
rtems_interrupt_disable (level);
/*
* FIXME: irq_hdl will probably not be called with its parameter
*/
irqSet (irq->name, (VoidFunctionPointer)irq->hdl);
if (irq->on != NULL)
irq->on (irq);
rtems_interrupt_enable (level);
return 1;
}
/*
* return the handler hooked to the given irq.
*/
int
BSP_get_current_rtems_irq_handler (rtems_irq_connect_data * irq)
{
return 0; /* FIXME */
}
/*
* remove & disable given irq.
*/
int
BSP_remove_rtems_irq_handler (const rtems_irq_connect_data * irq)
{
rtems_interrupt_level level;
if (!isValidInterrupt (irq->name))
return 0;
rtems_interrupt_disable (level);
if (irq->off != NULL)
irq->off (irq);
irqClear (irq->name);
rtems_interrupt_enable (level);
return 1;
}
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