[deliverable/linux.git] / arch / ia64 / kernel / irq_lsapic.c

/*
 * LSAPIC Interrupt Controller
 *
 * This takes care of interrupts that are generated by the CPU's
 * internal Streamlined Advanced Programmable Interrupt Controller
 * (LSAPIC), such as the ITC and IPI interrupts.
    *
 * Copyright (C) 1999 VA Linux Systems
 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
 * Copyright (C) 2000 Hewlett-Packard Co
 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <linux/sched.h>
#include <linux/irq.h>

static unsigned int
lsapic_noop_startup (struct irq_data *data)
{
	return 0;
}

static void
lsapic_noop (struct irq_data *data)
{
	/* nothing to do... */
}

static int lsapic_retrigger(struct irq_data *data)
{
	ia64_resend_irq(data->irq);

	return 1;
}

struct irq_chip irq_type_ia64_lsapic = {
	.name =			"LSAPIC",
	.irq_startup =		lsapic_noop_startup,
	.irq_shutdown =		lsapic_noop,
	.irq_enable =		lsapic_noop,
	.irq_disable =		lsapic_noop,
	.irq_ack =		lsapic_noop,
	.irq_retrigger =	lsapic_retrigger,
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* LSAPIC Interrupt Controller
	3	*
	4	* This takes care of interrupts that are generated by the CPU's
	5	* internal Streamlined Advanced Programmable Interrupt Controller
	6	* (LSAPIC), such as the ITC and IPI interrupts.
	7	*
	8	* Copyright (C) 1999 VA Linux Systems
	9	* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
	10	* Copyright (C) 2000 Hewlett-Packard Co
	11	* Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
	12	*/
	13
	14	#include <linux/sched.h>
	15	#include <linux/irq.h>
	16
	17	static unsigned int
5c217b60	18	lsapic_noop_startup (struct irq_data *data)
1da177e4 LT	19	{
	20	return 0;
	21	}
	22
	23	static void
5c217b60	24	lsapic_noop (struct irq_data *data)
1da177e4	25	{
72fdbdce	26	/* nothing to do... */
1da177e4 LT	27	}
1da177e4 LT	28
5c217b60	29	static int lsapic_retrigger(struct irq_data *data)
c0ad90a3	30	{
5c217b60	31	ia64_resend_irq(data->irq);
c0ad90a3 IM	32
	33	return 1;
	34	}
	35
fb824f48	36	struct irq_chip irq_type_ia64_lsapic = {
5c217b60 TG	37	.name = "LSAPIC",
	38	.irq_startup = lsapic_noop_startup,
	39	.irq_shutdown = lsapic_noop,
	40	.irq_enable = lsapic_noop,
	41	.irq_disable = lsapic_noop,
	42	.irq_ack = lsapic_noop,
	43	.irq_retrigger = lsapic_retrigger,
1da177e4	44	};