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* License Agreement                                                           *
*                                                                             *
* Copyright (c) 2009 Altera Corporation, San Jose, California, USA.           *
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******************************************************************************/

/*
 * Support for the Nios II internal interrupt controller.
 */

#ifndef __ALT_NIOS2_IRQ_H__
#define __ALT_NIOS2_IRQ_H__

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */

/*
 * The macro ALTERA_NIOS2_IRQ_INSTANCE is used by the alt_irq_init()
 * function in the auto-generated file alt_sys_init.c to create an
 * instance of this interrupt controller device driver state if this
 * module contains an interrupt controller.
 * Only one instance of a Nios II is allowed so this macro is just empty.
 */

#define ALTERA_NIOS2_IRQ_INSTANCE(name, state)

/*
 * altera_nios2_irq_init() is called by the auto-generated function 
 * alt_irq_init() once for the Nios II if it contains an interrupt controller.
 * The altera_nios2_irq_init() routine is called using the 
 * ALTERA_NIOS2_IRQ_INIT macro given below.
 *
 * This function initializes the internal interrupt controller
 * so is not called if the Nios II contains an external interrupt
 * controller port (because the internal interrupt controller
 * is removed if this port is present).
 */

extern void altera_nios2_irq_init( void );

/*
 * The macro ALTERA_NIOS2_IRQ_INIT is used by the alt_irq_init() routine
 * in the auto-generated file alt_sys_init.c to initialize an instance
 * of the interrupt controller device driver state.
 */

#define ALTERA_NIOS2_IRQ_INIT(name, state) altera_nios2_irq_init()

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __ALT_NIOS2_IRQ_H__ */

