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https://github.com/drasko/codezero.git
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92645be6ff
Important points: ---------------- 1. Works fine for pb926 + qemu. 2. Scan code logic for kryboard is not complete. We just have generic keys and shift working. 3. Mouse scancodes are collected but not decoded. 4. Right now we are doing enable_irq(), just before we go for waiting again for new irqs. This is not correct but we had latency issues. This needs to be fixed immediately. 5. Also it seems like the notify_clot count should be an atomic variable. Needs to be discussed.
86 lines
2.0 KiB
C
86 lines
2.0 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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/* If user will ack this irq */
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int user_ack;
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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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