[deliverable/linux.git] / arch / mips / netlogic / common / irq.c

/*
 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
 * reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the NetLogic
 * license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/irq.h>

#include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>

#include <asm/errno.h>
#include <asm/signal.h>
#include <asm/ptrace.h>
#include <asm/mipsregs.h>
#include <asm/thread_info.h>

#include <asm/netlogic/mips-extns.h>
#include <asm/netlogic/interrupt.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/common.h>

#if defined(CONFIG_CPU_XLP)
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>
#include <asm/netlogic/xlp-hal/pic.h>
#elif defined(CONFIG_CPU_XLR)
#include <asm/netlogic/xlr/iomap.h>
#include <asm/netlogic/xlr/pic.h>
#include <asm/netlogic/xlr/fmn.h>
#else
#error "Unknown CPU"
#endif

#ifdef CONFIG_SMP
#define SMP_IRQ_MASK	((1ULL << IRQ_IPI_SMP_FUNCTION) | \
				 (1ULL << IRQ_IPI_SMP_RESCHEDULE))
#else
#define SMP_IRQ_MASK	0
#endif
#define PERCPU_IRQ_MASK (SMP_IRQ_MASK | (1ull << IRQ_TIMER) | \
				(1ull << IRQ_FMN))

struct nlm_pic_irq {
	void	(*extra_ack)(struct irq_data *);
	struct	nlm_soc_info *node;
	int	picirq;
	int	irt;
	int	flags;
};

static void xlp_pic_enable(struct irq_data *d)
{
	unsigned long flags;
	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);

	BUG_ON(!pd);
	spin_lock_irqsave(&pd->node->piclock, flags);
	nlm_pic_enable_irt(pd->node->picbase, pd->irt);
	spin_unlock_irqrestore(&pd->node->piclock, flags);
}

static void xlp_pic_disable(struct irq_data *d)
{
	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);
	unsigned long flags;

	BUG_ON(!pd);
	spin_lock_irqsave(&pd->node->piclock, flags);
	nlm_pic_disable_irt(pd->node->picbase, pd->irt);
	spin_unlock_irqrestore(&pd->node->piclock, flags);
}

static void xlp_pic_mask_ack(struct irq_data *d)
{
	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);

	clear_c0_eimr(pd->picirq);
	ack_c0_eirr(pd->picirq);
}

static void xlp_pic_unmask(struct irq_data *d)
{
	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);

	BUG_ON(!pd);

	if (pd->extra_ack)
		pd->extra_ack(d);

	/* re-enable the intr on this cpu */
	set_c0_eimr(pd->picirq);

	/* Ack is a single write, no need to lock */
	nlm_pic_ack(pd->node->picbase, pd->irt);
}

static struct irq_chip xlp_pic = {
	.name		= "XLP-PIC",
	.irq_enable	= xlp_pic_enable,
	.irq_disable	= xlp_pic_disable,
	.irq_mask_ack	= xlp_pic_mask_ack,
	.irq_unmask	= xlp_pic_unmask,
};

static void cpuintr_disable(struct irq_data *d)
{
	clear_c0_eimr(d->irq);
}

static void cpuintr_enable(struct irq_data *d)
{
	set_c0_eimr(d->irq);
}

static void cpuintr_ack(struct irq_data *d)
{
	ack_c0_eirr(d->irq);
}

/*
 * Chip definition for CPU originated interrupts(timer, msg) and
 * IPIs
 */
struct irq_chip nlm_cpu_intr = {
	.name		= "XLP-CPU-INTR",
	.irq_enable	= cpuintr_enable,
	.irq_disable	= cpuintr_disable,
	.irq_mask	= cpuintr_disable,
	.irq_ack	= cpuintr_ack,
	.irq_eoi	= cpuintr_enable,
};

static void __init nlm_init_percpu_irqs(void)
{
	int i;

	for (i = 0; i < PIC_IRT_FIRST_IRQ; i++)
		irq_set_chip_and_handler(i, &nlm_cpu_intr, handle_percpu_irq);
#ifdef CONFIG_SMP
	irq_set_chip_and_handler(IRQ_IPI_SMP_FUNCTION, &nlm_cpu_intr,
			 nlm_smp_function_ipi_handler);
	irq_set_chip_and_handler(IRQ_IPI_SMP_RESCHEDULE, &nlm_cpu_intr,
			 nlm_smp_resched_ipi_handler);
#endif
}

void nlm_setup_pic_irq(int node, int picirq, int irq, int irt)
{
	struct nlm_pic_irq *pic_data;
	int xirq;

	xirq = nlm_irq_to_xirq(node, irq);
	pic_data = kzalloc(sizeof(*pic_data), GFP_KERNEL);
	BUG_ON(pic_data == NULL);
	pic_data->irt = irt;
	pic_data->picirq = picirq;
	pic_data->node = nlm_get_node(node);
	irq_set_chip_and_handler(xirq, &xlp_pic, handle_level_irq);
	irq_set_handler_data(xirq, pic_data);
}

void nlm_set_pic_extra_ack(int node, int irq, void (*xack)(struct irq_data *))
{
	struct nlm_pic_irq *pic_data;
	int xirq;

	xirq = nlm_irq_to_xirq(node, irq);
	pic_data = irq_get_handler_data(xirq);
	pic_data->extra_ack = xack;
}

static void nlm_init_node_irqs(int node)
{
	int i, irt;
	uint64_t irqmask;
	struct nlm_soc_info *nodep;

	pr_info("Init IRQ for node %d\n", node);
	nodep = nlm_get_node(node);
	irqmask = PERCPU_IRQ_MASK;
	for (i = PIC_IRT_FIRST_IRQ; i <= PIC_IRT_LAST_IRQ; i++) {
		irt = nlm_irq_to_irt(i);
		if (irt == -1)
			continue;
		nlm_setup_pic_irq(node, i, i, irt);
		/* set interrupts to first cpu in node */
		nlm_pic_init_irt(nodep->picbase, irt, i,
					node * NLM_CPUS_PER_NODE, 0);
		irqmask |= (1ull << i);
	}
	nodep->irqmask = irqmask;
}

void nlm_smp_irq_init(int hwcpuid)
{
	int node, cpu;

	node = hwcpuid / NLM_CPUS_PER_NODE;
	cpu  = hwcpuid % NLM_CPUS_PER_NODE;

	if (cpu == 0 && node != 0)
		nlm_init_node_irqs(node);
	write_c0_eimr(nlm_current_node()->irqmask);
}

asmlinkage void plat_irq_dispatch(void)
{
	uint64_t eirr;
	int i, node;

	node = nlm_nodeid();
	eirr = read_c0_eirr_and_eimr();
	if (eirr == 0)
		return;

	i = __ffs64(eirr);
	/* per-CPU IRQs don't need translation */
	if (i < PIC_IRQ_BASE) {
		do_IRQ(i);
		return;
	}

	/* top level irq handling */
	do_IRQ(nlm_irq_to_xirq(node, i));
}

#ifdef CONFIG_OF
static struct irq_domain *xlp_pic_domain;

static const struct irq_domain_ops xlp_pic_irq_domain_ops = {
	.xlate = irq_domain_xlate_onetwocell,
};

static int __init xlp_of_pic_init(struct device_node *node,
					struct device_node *parent)
{
	const int n_picirqs = PIC_IRT_LAST_IRQ - PIC_IRQ_BASE + 1;
	struct resource res;
	int socid, ret;

	/* we need a hack to get the PIC's SoC chip id */
	ret = of_address_to_resource(node, 0, &res);
	if (ret < 0) {
		pr_err("PIC %s: reg property not found!\n", node->name);
		return -EINVAL;
	}
	socid = (res.start >> 18) & 0x3;
	xlp_pic_domain = irq_domain_add_legacy(node, n_picirqs,
		nlm_irq_to_xirq(socid, PIC_IRQ_BASE), PIC_IRQ_BASE,
		&xlp_pic_irq_domain_ops, NULL);
	if (xlp_pic_domain == NULL) {
		pr_err("PIC %s: Creating legacy domain failed!\n", node->name);
		return -EINVAL;
	}
	pr_info("Node %d: IRQ domain created for PIC@%pa\n", socid,
							&res.start);
	return 0;
}

static struct of_device_id __initdata xlp_pic_irq_ids[] = {
	{ .compatible = "netlogic,xlp-pic", .data = xlp_of_pic_init },
	{},
};
#endif

void __init arch_init_irq(void)
{
	/* Initialize the irq descriptors */
	nlm_init_percpu_irqs();
	nlm_init_node_irqs(0);
	write_c0_eimr(nlm_current_node()->irqmask);
#if defined(CONFIG_CPU_XLR)
	nlm_setup_fmn_irq();
#endif
#if defined(CONFIG_OF)
	of_irq_init(xlp_pic_irq_ids);
#endif
}
Commit	Line	Data
0c965407 J	1	/*
	2	* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
	3	* reserved.
	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the NetLogic
	9	* license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	*
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions and the following disclaimer.
	17	* 2. Redistributions in binary form must reproduce the above copyright
	18	* notice, this list of conditions and the following disclaimer in
	19	* the documentation and/or other materials provided with the
	20	* distribution.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
	23	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	24	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	* ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	27	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	28	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	29	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	30	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
	31	* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
	32	* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	33	*/
	34
	35	#include <linux/kernel.h>
	36	#include <linux/init.h>
	37	#include <linux/linkage.h>
	38	#include <linux/interrupt.h>
0c965407 J	39	#include <linux/mm.h>
	40	#include <linux/slab.h>
	41	#include <linux/irq.h>
	42
628f0650 J	43	#include <linux/irqdomain.h>
	44	#include <linux/of_address.h>
	45	#include <linux/of_irq.h>
	46
0c965407 J	47	#include <asm/errno.h>
0c965407 J	48	#include <asm/signal.h>
0c965407 J	49	#include <asm/ptrace.h>
	50	#include <asm/mipsregs.h>
	51	#include <asm/thread_info.h>
	52
	53	#include <asm/netlogic/mips-extns.h>
	54	#include <asm/netlogic/interrupt.h>
	55	#include <asm/netlogic/haldefs.h>
	56	#include <asm/netlogic/common.h>
	57
65040e22 J	58	#if defined(CONFIG_CPU_XLP)
	59	#include <asm/netlogic/xlp-hal/iomap.h>
	60	#include <asm/netlogic/xlp-hal/xlp.h>
	61	#include <asm/netlogic/xlp-hal/pic.h>
	62	#elif defined(CONFIG_CPU_XLR)
0c965407 J	63	#include <asm/netlogic/xlr/iomap.h>
0c965407 J	64	#include <asm/netlogic/xlr/pic.h>
ed21cfe2	65	#include <asm/netlogic/xlr/fmn.h>
65040e22 J	66	#else
	67	#error "Unknown CPU"
	68	#endif
0c965407	69
38541742 J	70	#ifdef CONFIG_SMP
	71	#define SMP_IRQ_MASK ((1ULL << IRQ_IPI_SMP_FUNCTION) \| \
	72	(1ULL << IRQ_IPI_SMP_RESCHEDULE))
	73	#else
	74	#define SMP_IRQ_MASK 0
	75	#endif
70342287	76	#define PERCPU_IRQ_MASK (SMP_IRQ_MASK \| (1ull << IRQ_TIMER) \| \
ed21cfe2	77	(1ull << IRQ_FMN))
38541742 J	78
	79	struct nlm_pic_irq {
	80	void (extra_ack)(struct irq_data );
	81	struct nlm_soc_info *node;
	82	int picirq;
	83	int irt;
	84	int flags;
	85	};
	86
0c965407 J	87	static void xlp_pic_enable(struct irq_data *d)
	88	{
	89	unsigned long flags;
38541742	90	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);
0c965407	91
38541742 J	92	BUG_ON(!pd);
	93	spin_lock_irqsave(&pd->node->piclock, flags);
	94	nlm_pic_enable_irt(pd->node->picbase, pd->irt);
	95	spin_unlock_irqrestore(&pd->node->piclock, flags);
0c965407 J	96	}
	97
	98	static void xlp_pic_disable(struct irq_data *d)
	99	{
38541742	100	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);
0c965407	101	unsigned long flags;
0c965407	102
38541742 J	103	BUG_ON(!pd);
	104	spin_lock_irqsave(&pd->node->piclock, flags);
	105	nlm_pic_disable_irt(pd->node->picbase, pd->irt);
	106	spin_unlock_irqrestore(&pd->node->piclock, flags);
0c965407 J	107	}
	108
	109	static void xlp_pic_mask_ack(struct irq_data *d)
	110	{
38541742	111	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);
0c965407	112
220d9122 J	113	clear_c0_eimr(pd->picirq);
220d9122 J	114	ack_c0_eirr(pd->picirq);
0c965407 J	115	}
	116
	117	static void xlp_pic_unmask(struct irq_data *d)
	118	{
38541742	119	struct nlm_pic_irq *pd = irq_data_get_irq_handler_data(d);
0c965407	120
220d9122	121	BUG_ON(!pd);
0c965407	122
38541742 J	123	if (pd->extra_ack)
	124	pd->extra_ack(d);
	125
220d9122 J	126	/* re-enable the intr on this cpu */
	127	set_c0_eimr(pd->picirq);
	128
0c965407	129	/* Ack is a single write, no need to lock */
38541742	130	nlm_pic_ack(pd->node->picbase, pd->irt);
0c965407 J	131	}
	132
	133	static struct irq_chip xlp_pic = {
	134	.name = "XLP-PIC",
	135	.irq_enable = xlp_pic_enable,
	136	.irq_disable = xlp_pic_disable,
	137	.irq_mask_ack = xlp_pic_mask_ack,
	138	.irq_unmask = xlp_pic_unmask,
	139	};
	140
	141	static void cpuintr_disable(struct irq_data *d)
	142	{
220d9122	143	clear_c0_eimr(d->irq);
0c965407 J	144	}
	145
	146	static void cpuintr_enable(struct irq_data *d)
	147	{
220d9122	148	set_c0_eimr(d->irq);
0c965407 J	149	}
	150
	151	static void cpuintr_ack(struct irq_data *d)
	152	{
220d9122	153	ack_c0_eirr(d->irq);
0c965407 J	154	}
	155
	156	/*
	157	* Chip definition for CPU originated interrupts(timer, msg) and
	158	* IPIs
	159	*/
	160	struct irq_chip nlm_cpu_intr = {
	161	.name = "XLP-CPU-INTR",
	162	.irq_enable = cpuintr_enable,
	163	.irq_disable = cpuintr_disable,
220d9122 J	164	.irq_mask = cpuintr_disable,
	165	.irq_ack = cpuintr_ack,
	166	.irq_eoi = cpuintr_enable,
0c965407 J	167	};
0c965407 J	168
38541742	169	static void __init nlm_init_percpu_irqs(void)
0c965407	170	{
38541742	171	int i;
0c965407 J	172
	173	for (i = 0; i < PIC_IRT_FIRST_IRQ; i++)
	174	irq_set_chip_and_handler(i, &nlm_cpu_intr, handle_percpu_irq);
0c965407 J	175	#ifdef CONFIG_SMP
	176	irq_set_chip_and_handler(IRQ_IPI_SMP_FUNCTION, &nlm_cpu_intr,
	177	nlm_smp_function_ipi_handler);
	178	irq_set_chip_and_handler(IRQ_IPI_SMP_RESCHEDULE, &nlm_cpu_intr,
	179	nlm_smp_resched_ipi_handler);
0c965407	180	#endif
38541742 J	181	}
	182
	183	void nlm_setup_pic_irq(int node, int picirq, int irq, int irt)
	184	{
	185	struct nlm_pic_irq *pic_data;
	186	int xirq;
	187
	188	xirq = nlm_irq_to_xirq(node, irq);
	189	pic_data = kzalloc(sizeof(*pic_data), GFP_KERNEL);
	190	BUG_ON(pic_data == NULL);
	191	pic_data->irt = irt;
	192	pic_data->picirq = picirq;
	193	pic_data->node = nlm_get_node(node);
	194	irq_set_chip_and_handler(xirq, &xlp_pic, handle_level_irq);
	195	irq_set_handler_data(xirq, pic_data);
	196	}
0c965407	197
38541742 J	198	void nlm_set_pic_extra_ack(int node, int irq, void (xack)(struct irq_data ))
	199	{
	200	struct nlm_pic_irq *pic_data;
	201	int xirq;
	202
	203	xirq = nlm_irq_to_xirq(node, irq);
	204	pic_data = irq_get_handler_data(xirq);
	205	pic_data->extra_ack = xack;
	206	}
	207
	208	static void nlm_init_node_irqs(int node)
	209	{
	210	int i, irt;
	211	uint64_t irqmask;
	212	struct nlm_soc_info *nodep;
	213
	214	pr_info("Init IRQ for node %d\n", node);
	215	nodep = nlm_get_node(node);
	216	irqmask = PERCPU_IRQ_MASK;
	217	for (i = PIC_IRT_FIRST_IRQ; i <= PIC_IRT_LAST_IRQ; i++) {
	218	irt = nlm_irq_to_irt(i);
0c965407 J	219	if (irt == -1)
0c965407 J	220	continue;
38541742 J	221	nlm_setup_pic_irq(node, i, i, irt);
	222	/* set interrupts to first cpu in node */
	223	nlm_pic_init_irt(nodep->picbase, irt, i,
4e45e542	224	node * NLM_CPUS_PER_NODE, 0);
38541742	225	irqmask \|= (1ull << i);
0c965407	226	}
77ae798f	227	nodep->irqmask = irqmask;
0c965407 J	228	}
0c965407 J	229
38541742	230	void nlm_smp_irq_init(int hwcpuid)
0c965407	231	{
38541742 J	232	int node, cpu;
	233
	234	node = hwcpuid / NLM_CPUS_PER_NODE;
	235	cpu = hwcpuid % NLM_CPUS_PER_NODE;
	236
	237	if (cpu == 0 && node != 0)
	238	nlm_init_node_irqs(node);
77ae798f	239	write_c0_eimr(nlm_current_node()->irqmask);
0c965407 J	240	}
	241
	242	asmlinkage void plat_irq_dispatch(void)
	243	{
	244	uint64_t eirr;
77ae798f	245	int i, node;
0c965407	246
77ae798f	247	node = nlm_nodeid();
220d9122	248	eirr = read_c0_eirr_and_eimr();
8ecd0837	249	if (eirr == 0)
0c965407 J	250	return;
0c965407 J	251
8ecd0837	252	i = __ffs64(eirr);
38541742	253	/* per-CPU IRQs don't need translation */
8ecd0837	254	if (i < PIC_IRQ_BASE) {
38541742 J	255	do_IRQ(i);
	256	return;
	257	}
	258
	259	/* top level irq handling */
77ae798f	260	do_IRQ(nlm_irq_to_xirq(node, i));
0c965407	261	}
628f0650 J	262
	263	#ifdef CONFIG_OF
	264	static struct irq_domain *xlp_pic_domain;
	265
	266	static const struct irq_domain_ops xlp_pic_irq_domain_ops = {
	267	.xlate = irq_domain_xlate_onetwocell,
	268	};
	269
	270	static int __init xlp_of_pic_init(struct device_node *node,
	271	struct device_node *parent)
	272	{
	273	const int n_picirqs = PIC_IRT_LAST_IRQ - PIC_IRQ_BASE + 1;
	274	struct resource res;
	275	int socid, ret;
	276
	277	/* we need a hack to get the PIC's SoC chip id */
	278	ret = of_address_to_resource(node, 0, &res);
	279	if (ret < 0) {
	280	pr_err("PIC %s: reg property not found!\n", node->name);
	281	return -EINVAL;
	282	}
	283	socid = (res.start >> 18) & 0x3;
	284	xlp_pic_domain = irq_domain_add_legacy(node, n_picirqs,
	285	nlm_irq_to_xirq(socid, PIC_IRQ_BASE), PIC_IRQ_BASE,
	286	&xlp_pic_irq_domain_ops, NULL);
	287	if (xlp_pic_domain == NULL) {
	288	pr_err("PIC %s: Creating legacy domain failed!\n", node->name);
	289	return -EINVAL;
	290	}
	291	pr_info("Node %d: IRQ domain created for PIC@%pa\n", socid,
	292	&res.start);
	293	return 0;
	294	}
	295
	296	static struct of_device_id __initdata xlp_pic_irq_ids[] = {
	297	{ .compatible = "netlogic,xlp-pic", .data = xlp_of_pic_init },
	298	{},
	299	};
	300	#endif
	301
	302	void __init arch_init_irq(void)
	303	{
	304	/* Initialize the irq descriptors */
	305	nlm_init_percpu_irqs();
	306	nlm_init_node_irqs(0);
	307	write_c0_eimr(nlm_current_node()->irqmask);
	308	#if defined(CONFIG_CPU_XLR)
	309	nlm_setup_fmn_irq();
	310	#endif
	311	#if defined(CONFIG_OF)
	312	of_irq_init(xlp_pic_irq_ids);
	313	#endif
	314	}