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32c0bb3a76
Irqs can now touch runqueues and do async wakeups. This necessitated that we implement all wake up wait and runqueue locking work with irqs. All this, assumes that in an SMP setup we may have cross-cpu wake ups, runqueue manipulation. If we later decide that we only wake up threads in the current container, (and lock containers to cpus) we won't really need spinlocks, or irq disabling anymore. The current set up might be trivially less responsive, but is more flexible.
82 lines
1.9 KiB
C
82 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)(void);
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l4id_t (*read_irq)(void);
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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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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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