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83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
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* Generic irq handling definitions.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#ifndef __GENERIC_IRQ_H__
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#define __GENERIC_IRQ_H__
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#include <l4/lib/string.h>
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#include <l4/lib/wait.h>
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#include INC_PLAT(irq.h)
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#include INC_ARCH(types.h)
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/* Represents none or spurious irq */
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#define IRQ_NIL 0xFFFFFFFF
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/* Successful irq handling state */
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#define IRQ_HANDLED 0
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typedef void (*irq_op_t)(l4id_t irq);
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struct irq_chip_ops {
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void (*init)();
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l4id_t (*read_irq)(void *data);
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irq_op_t ack_and_mask;
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irq_op_t unmask;
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};
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struct irq_chip {
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char name[32];
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int level; /* Cascading level */
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int cascade; /* The irq that lower chip uses on this chip */
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int start; /* The global irq offset for this chip */
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int end; /* End of this chip's irqs */
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void *data; /* Anything that a of interest to a driver */
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struct irq_chip_ops ops;
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};
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struct irq_desc;
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typedef int (*irq_handler_t)(struct irq_desc *irq_desc);
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struct irq_desc {
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char name[8];
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struct irq_chip *chip;
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/* Thread registered for this irq */
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struct ktcb *task;
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/* Notification slot for this irq */
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int task_notify_slot;
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/* Waitqueue head for this irq */
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struct waitqueue_head wqh_irq;
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/* NOTE: This could be a list for multiple handlers for shared irqs */
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irq_handler_t handler;
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};
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extern struct irq_desc irq_desc_array[];
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extern struct irq_chip irq_chip_array[];
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static inline void irq_enable(int irq_index)
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{
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struct irq_desc *this_irq = irq_desc_array + irq_index;
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struct irq_chip *this_chip = this_irq->chip;
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this_chip->ops.unmask(irq_index - this_chip->start);
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}
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static inline void irq_disable(int irq_index)
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{
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struct irq_desc *this_irq = irq_desc_array + irq_index;
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struct irq_chip *this_chip = this_irq->chip;
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this_chip->ops.ack_and_mask(irq_index - this_chip->start);
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}
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int irq_register(struct ktcb *task, int notify_slot, l4id_t irq_index);
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int irq_thread_notify(struct irq_desc *desc);
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void do_irq(void);
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void irq_controllers_init(void);
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#endif /* __GENERIC_IRQ_H__ */
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