1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
 4 * Copyright (C) 2001 Ralf Baechle
 5 * Copyright (C) 2010 PMC-Sierra, Inc.
 6 *
 7 *  VSMP support for MSP platforms . Derived from malta vsmp support.
 8 */
 9#include <linux/smp.h>
10#include <linux/interrupt.h>
11
12#include <asm/setup.h>
13
14#ifdef CONFIG_MIPS_MT_SMP
15#define MIPS_CPU_IPI_RESCHED_IRQ 0	/* SW int 0 for resched */
16#define MIPS_CPU_IPI_CALL_IRQ 1		/* SW int 1 for call */
17
18
19static void ipi_resched_dispatch(void)
20{
21	do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
22}
23
24static void ipi_call_dispatch(void)
25{
26	do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
27}
28
29static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
30{
31	return IRQ_HANDLED;
32}
33
34static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
35{
36	generic_smp_call_function_interrupt();
37
38	return IRQ_HANDLED;
39}
40
41static struct irqaction irq_resched = {
42	.handler	= ipi_resched_interrupt,
43	.flags		= IRQF_PERCPU,
44	.name		= "IPI_resched"
45};
46
47static struct irqaction irq_call = {
48	.handler	= ipi_call_interrupt,
49	.flags		= IRQF_PERCPU,
50	.name		= "IPI_call"
51};
52
53void __init arch_init_ipiirq(int irq, struct irqaction *action)
54{
55	setup_irq(irq, action);
56	irq_set_handler(irq, handle_percpu_irq);
57}
58
59void __init msp_vsmp_int_init(void)
60{
61	set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
62	set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
63	arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched);
64	arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call);
65}
66#endif /* CONFIG_MIPS_MT_SMP */