irq.h File Reference

#include <core/types.h>

Go to the source code of this file.

Typedefs
typedef void(*)	irq_handler_t(void *arg)

Functions
int	irq_install (unsigned irq, irq_handler_t fn, void *arg)
	Installs a handler for an IRQ.
void	irq_uninstall (unsigned irq, irq_handler_t fn, void *arg)
	Removes a handler that irq_install() installed.

Typedef Documentation

irq_handler_t

typedef void(*) irq_handler_t(void *arg)

Definition at line 21 of file irq.h.

Function Documentation

irq_install()

int irq_install	(	unsigned	irq,
		irq_handler_t	fn,
		void *	arg )

Installs a handler for an IRQ.

The first handler installed unmasks the IRQ at its interrupt controller.

Parameters

irq	the IRQ, the platform's number for it
fn	the handler
arg	the argument the handler is called with

Returns

0, -EINVAL if there's no such IRQ, or -ENOMEM if there was no memory for the handler

Definition at line 32 of file irq.c.

References handler::arg, chip_of(), handler::fn, gic_enable(), handlers, irq_install(), IRQ_NR, irqs, kmalloc(), M_ZERO, handler::next, x86_irq_chip::unmask, X86_IRQ_NR, and X86_IRQ_TIMER.

Referenced by arch_msi_alloc(), ata_probe(), e1000_probe(), i8042_init(), irq_install(), pl011_init(), platform_timer_setup(), timer_setup(), uart_8250_attach(), and x86_lapic_timer_setup().

irq_uninstall()

void irq_uninstall	(	unsigned	irq,
		irq_handler_t	fn,
		void *	arg )

Removes a handler that irq_install() installed.

The last handler removed masks the IRQ at its interrupt controller.

Parameters

irq	the IRQ
fn	the handler, as it was installed
arg	its argument, as it was installed

Definition at line 62 of file irq.c.

References handler::arg, chip_of(), handler::fn, gic_disable(), handlers, IRQ_NR, irq_uninstall(), irqs, kfree(), x86_irq_chip::mask, handler::next, X86_IRQ_NR, and X86_IRQ_TIMER.

Referenced by irq_uninstall().