1/*
 2 * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
 3 * Copyright (C) 2001 Ralf Baechle
 4 * Copyright (C) 2010 PMC-Sierra, Inc.
 5 *
 6 *  VSMP support for MSP platforms . Derived from malta vsmp support.
 7 *
 8 *  This program is free software; you can distribute it and/or modify it
 9 *  under the terms of the GNU General Public License (Version 2) as
10 *  published by the Free Software Foundation.
11 *
12 *  This program is distributed in the hope it will be useful, but WITHOUT
13 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15 *  for more details.
16 *
17 *  You should have received a copy of the GNU General Public License along
18 *  with this program; if not, write to the Free Software Foundation, Inc.,
19 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
20 *
21 */
22#include <linux/smp.h>
23#include <linux/interrupt.h>
24
25#include <asm/setup.h>
26
27#ifdef CONFIG_MIPS_MT_SMP
28#define MIPS_CPU_IPI_RESCHED_IRQ 0	/* SW int 0 for resched */
29#define MIPS_CPU_IPI_CALL_IRQ 1		/* SW int 1 for call */
30
31
32static void ipi_resched_dispatch(void)
33{
34	do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
35}
36
37static void ipi_call_dispatch(void)
38{
39	do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
40}
41
42static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
43{
44	return IRQ_HANDLED;
45}
46
47static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
48{
49	generic_smp_call_function_interrupt();
50
51	return IRQ_HANDLED;
52}
53
54static struct irqaction irq_resched = {
55	.handler	= ipi_resched_interrupt,
56	.flags		= IRQF_PERCPU,
57	.name		= "IPI_resched"
58};
59
60static struct irqaction irq_call = {
61	.handler	= ipi_call_interrupt,
62	.flags		= IRQF_PERCPU,
63	.name		= "IPI_call"
64};
65
66void __init arch_init_ipiirq(int irq, struct irqaction *action)
67{
68	setup_irq(irq, action);
69	irq_set_handler(irq, handle_percpu_irq);
70}
71
72void __init msp_vsmp_int_init(void)
73{
74	set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
75	set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
76	arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched);
77	arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call);
78}
79#endif /* CONFIG_MIPS_MT_SMP */