irq.c File Reference

Go to the source code of this file.

Classes
struct	dde_irq
	IRQ handling data. More...
Functions
static void	irq_thread_init (void *p)
static void	irq_handler (void *arg)
static int	claim_irq (struct irqaction *action)
	Claim IRQ.
static struct irqaction *	release_irq (unsigned irq_num, void *dev_id)
	Free previously claimed IRQ.
int	request_irq (unsigned int irq, irq_handler_t handler, unsigned long flags, const char *dev_name, void *dev_id)
	Request interrupt.
void	free_irq (unsigned int irq, void *dev_id)
	Release Interrupt.
void	disable_irq (unsigned int irq)
void	disable_irq_nosync (unsigned int irq)
void	enable_irq (unsigned int irq)
Variables
irq_cpustat_t	irq_stat [CONFIG_NR_CPUS]
static struct dde_irq *	used_irqs
	IRQ handling data.
ddekit_sem_t *	dde_softirq_sem

---

Function Documentation

static int claim_irq

(

struct irqaction *

action

)

[static]

Claim IRQ.

Returns:

usage counter or negative error code

FIXME list locking FIXME are there more races?

Definition at line 80 of file irq.c.

void disable_irq

(

unsigned int

irq

)

Definition at line 228 of file irq.c.

void disable_irq_nosync

(

unsigned int

irq

)

Definition at line 233 of file irq.c.

void enable_irq

(

unsigned int

irq

)

Definition at line 244 of file irq.c.

void free_irq	(	unsigned int	irq,
		void *	dev_id
	)

Release Interrupt.

Parameters:

	irq	interrupt number
	dev_id	cookie passed back to handler

Definition at line 220 of file irq.c.

static void irq_handler

(

void *

arg

)

[static]

Definition at line 46 of file irq.c.

static void irq_thread_init

(

void *

p

)

[static]

Definition at line 41 of file irq.c.

static struct irqaction* release_irq	(	unsigned	irq_num,
		void *	dev_id
	)			[static, read]

Free previously claimed IRQ.

Returns:

usage counter or negative error code

Definition at line 130 of file irq.c.

int request_irq	(	unsigned int	irq,
		irq_handler_t	handler,
		unsigned long	flags,
		const char *	dev_name,
		void *	dev_id
	)

Request interrupt.

Parameters:

	irq	interrupt number
	handler	interrupt handler -> top half
	flags	interrupt handling flags (SA_SHIRQ, ...)
	dev_name	device name
	dev_id	cookie passed back to handler

Returns:

0 on success; error code otherwise

Todo:

FIXME consider locking!

Definition at line 190 of file irq.c.

---

Variable Documentation

ddekit_sem_t* dde_softirq_sem

Definition at line 12 of file softirq.c.

irq_cpustat_t irq_stat[CONFIG_NR_CPUS]

Definition at line 24 of file irq.c.

struct dde_irq * used_irqs [static]

IRQ handling data.