Release 4.14 arch/mips/pmcs-msp71xx/msp_smp.c
/*
* 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.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
*/
#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);
}
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static void ipi_call_dispatch(void)
{
do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
}
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static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
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static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
{
generic_smp_call_function_interrupt();
return IRQ_HANDLED;
}
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static struct irqaction irq_resched = {
.handler = ipi_resched_interrupt,
.flags = IRQF_PERCPU,
.name = "IPI_resched"
};
static struct irqaction irq_call = {
.handler = ipi_call_interrupt,
.flags = IRQF_PERCPU,
.name = "IPI_call"
};
void __init arch_init_ipiirq(int irq, struct irqaction *action)
{
setup_irq(irq, action);
irq_set_handler(irq, handle_percpu_irq);
}
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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, &irq_resched);
arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call);
}
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#endif /* CONFIG_MIPS_MT_SMP */
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