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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
* Copyright (C) 2001 Ralf Baechle
* Copyright (C) 2010 PMC-Sierra, Inc.
*
* VSMP support for MSP platforms . Derived from malta vsmp support.
*/
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <asm/setup.h>
#ifdef CONFIG_MIPS_MT_SMP
#define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */
#define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for call */
static void ipi_resched_dispatch(void)
{
do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
}
static void ipi_call_dispatch(void)
{
do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
}
static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
{
generic_smp_call_function_interrupt();
return IRQ_HANDLED;
}
void __init arch_init_ipiirq(int irq, const char *name, irq_handler_t handler)
{
if (request_irq(irq, handler, IRQF_PERCPU, name, NULL))
pr_err("Failed to request irq %d (%s)\n", irq, name);
irq_set_handler(irq, handle_percpu_irq);
}
void __init msp_vsmp_int_init(void)
{
set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, "IPI_resched",
ipi_resched_interrupt);
arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, "IPI_call", ipi_call_interrupt);
}
#endif /* CONFIG_MIPS_MT_SMP */
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