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#ifndef KERN_IRQ_H_
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#ifndef KERN_IRQ_H_
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#define KERN_IRQ_H_
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#define KERN_IRQ_H_
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#include <arch/types.h>
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#include <arch/types.h>
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#include <adt/list.h>
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#include <adt/list.h>
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#include <ipc/ipc.h>
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#include <ipc/irq.h>
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#include <atomic.h>
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#include <synch/spinlock.h>
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typedef enum {
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typedef enum {
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    IRQ_DECLINE,        /**< Decline to service. */
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    IRQ_DECLINE,        /**< Decline to service. */
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    IRQ_ACCEPT      /**< Accept to service. */
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    IRQ_ACCEPT      /**< Accept to service. */
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} irq_ownership_t;
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} irq_ownership_t;
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 */
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 */
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struct irq {
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struct irq {
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    /** Hash table link. */
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    /** Hash table link. */
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    link_t link;
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    link_t link;
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    /** Lock protecting everything in this structure
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     *  except the link member. When both the IRQ
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     *  hash table lock and this lock are to be acquired,
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     *  this lock must not be taken first.
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     */
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    SPINLOCK_DECLARE(lock);
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    /** Unique device number. -1 if not yet assigned. */
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    /** Unique device number. -1 if not yet assigned. */
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    devno_t devno;
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    devno_t devno;
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    /** Actual IRQ number. -1 if not yet assigned. */
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    /** Actual IRQ number. -1 if not yet assigned. */
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    inr_t inr;
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    inr_t inr;
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    /** Task ID of the task to be notified about the IRQ or 0. */
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    task_id_t notif;
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    /** Trigger level of the IRQ.*/
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    /** Trigger level of the IRQ.*/
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    irq_trigger_t trigger;
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    irq_trigger_t trigger;
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    /** Claim ownership of the IRQ. */
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    /** Claim ownership of the IRQ. */
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    irq_ownership_t (* claim)(void);
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    irq_ownership_t (* claim)(void);
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    /** Handler for this IRQ and device. */
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    /** Handler for this IRQ and device. */
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    irq_handler_t handler;
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    irq_handler_t handler;
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    /** Argument for the handler. */
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    /** Argument for the handler. */
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    void *arg;
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    void *arg;
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    /** Answerbox of the task that wanted to be notified. */
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    answerbox_t *notif_answerbox;
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    /** Pseudo-code to be performed by the top-half
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     *  before a notification is sent. */
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    irq_code_t *code;
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    /** Counter of IRQ notifications. */
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    atomic_t counter;
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};
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};
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extern void irq_init(count_t inrs, count_t chains);
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extern void irq_init(count_t inrs, count_t chains);
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extern void irq_initialize(irq_t *irq);
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extern void irq_initialize(irq_t *irq);
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extern void irq_register(irq_t *irq);
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extern void irq_register(irq_t *irq);