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Preliminary irq registration call + irq capability checking

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Need to add irqctrl capabilities and irq bits to device memory
caps.

Also need to initialize irq field of devmem caps.
This commit is contained in:
Bahadir Balban
2009-11-28 19:13:23 +02:00
parent b5e6c66426
commit 6e40a2b601
17 changed files with 380 additions and 110 deletions
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41
include/l4/generic/irq.h
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@@ -8,17 +8,18 @@
#include <l4/lib/string.h>
#include INC_PLAT(irq.h)
#include INC_ARCH(types.h)
/* Represents none or spurious irq */
#define IRQ_NIL (-1)
#define IRQ_NIL 0xFFFFFFFF
/* Successful irq handling state */
#define IRQ_HANDLED 0
typedef void (*irq_op_t)(int irq);
typedef void (*irq_op_t)(l4id_t irq);
struct irq_chip_ops {
void (*init)(void);
int (*read_irq)(void);
l4id_t (*read_irq)(void);
irq_op_t ack_and_mask;
irq_op_t unmask;
};
@@ -27,16 +28,24 @@ struct irq_chip {
char name[32];
int level; /* Cascading level */
int cascade; /* The irq that lower chip uses on this chip */
int offset; /* The global offset for this irq chip */
int start; /* The global irq offset for this chip */
int end; /* End of this chip's irqs */
struct irq_chip_ops ops;
};
typedef int (*irq_handler_t)(void);
struct irq_desc;
typedef int (*irq_handler_t)(struct irq_desc *irq_desc);
struct irq_desc {
char name[8];
struct irq_chip *chip;
/* TODO: This could be a list for multiple handlers */
/* Thread registered for this irq */
struct ktcb *irq_thread;
/* Notification slot for this irq */
int task_notify_slot;
/* NOTE: This could be a list for multiple handlers for shared irqs */
irq_handler_t handler;
};
@@ -48,7 +57,7 @@ static inline void irq_enable(int irq_index)
struct irq_desc *this_irq = irq_desc_array + irq_index;
struct irq_chip *this_chip = this_irq->chip;
this_chip->ops.unmask(irq_index - this_chip->offset);
this_chip->ops.unmask(irq_index - this_chip->start);
}
static inline void irq_disable(int irq_index)
@@ -56,23 +65,11 @@ static inline void irq_disable(int irq_index)
struct irq_desc *this_irq = irq_desc_array + irq_index;
struct irq_chip *this_chip = this_irq->chip;
this_chip->ops.ack_and_mask(irq_index - this_chip->offset);
this_chip->ops.ack_and_mask(irq_index - this_chip->start);
}
static inline void register_irq(char *name, int irq_index, irq_handler_t handler)
{
struct irq_desc *this_desc = irq_desc_array + irq_index;
struct irq_chip *current_chip = irq_chip_array;
strncpy(&this_desc->name[0], name, sizeof(this_desc->name));
for (int i = 0; i < IRQ_CHIPS_MAX; i++)
if (irq_index <= current_chip->offset) {
this_desc->chip = current_chip;
break;
}
this_desc->handler = handler;
}
int irq_register(struct ktcb *task, int notify_slot,
l4id_t irq_index, irq_handler_t handler);
void do_irq(void);
void irq_controllers_init(void);