[linux-2.6-block.git] / 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>

#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;
}

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);
}

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);
}
#endif /* CONFIG_MIPS_MT_SMP */
Commit	Line	Data
088f3876 A	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
	30	static void ipi_resched_dispatch(void)
	31	{
	32	do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
	33	}
	34
	35	static void ipi_call_dispatch(void)
	36	{
	37	do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
	38	}
	39
	40	static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
	41	{
	42	return IRQ_HANDLED;
	43	}
	44
	45	static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
	46	{
4ace6139	47	generic_smp_call_function_interrupt();
088f3876 A	48
	49	return IRQ_HANDLED;
	50	}
	51
	52	static struct irqaction irq_resched = {
	53	.handler = ipi_resched_interrupt,
8b5690f8	54	.flags = IRQF_PERCPU,
088f3876 A	55	.name = "IPI_resched"
	56	};
	57
	58	static struct irqaction irq_call = {
	59	.handler = ipi_call_interrupt,
8b5690f8	60	.flags = IRQF_PERCPU,
088f3876 A	61	.name = "IPI_call"
	62	};
	63
	64	void __init arch_init_ipiirq(int irq, struct irqaction *action)
	65	{
	66	setup_irq(irq, action);
e4ec7989	67	irq_set_handler(irq, handle_percpu_irq);
088f3876 A	68	}
	69
	70	void __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 */