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#ifdef CONFIG_MIPS_MT_SMP
26#define MIPS_CPU_IPI_RESCHED_IRQ 0	/* SW int 0 for resched */
27#define MIPS_CPU_IPI_CALL_IRQ 1		/* SW int 1 for call */
28
29
30static void ipi_resched_dispatch(void)
31{
32	do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
33}
34
35static void ipi_call_dispatch(void)
36{
37	do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
38}
39
40static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
41{
42	return IRQ_HANDLED;
43}
44
45static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
46{
47	generic_smp_call_function_interrupt();
48
49	return IRQ_HANDLED;
50}
51
52static struct irqaction irq_resched = {
53	.handler	= ipi_resched_interrupt,
54	.flags		= IRQF_PERCPU,
55	.name		= "IPI_resched"
56};
57
58static struct irqaction irq_call = {
59	.handler	= ipi_call_interrupt,
60	.flags		= IRQF_PERCPU,
61	.name		= "IPI_call"
62};
63
64void __init arch_init_ipiirq(int irq, struct irqaction *action)
65{
66	setup_irq(irq, action);
67	irq_set_handler(irq, handle_percpu_irq);
68}
69
70void __init msp_vsmp_int_init(void)
71{
72	set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
73	set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
74	arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched);
75	arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call);
76}
77#endif /* CONFIG_MIPS_MT_SMP */
78