Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * Copyright (C) 2003 Ralf Baechle

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 *

 * Handler for RM7000 extended interrupts.  These are a non-standard

 * feature so we handle them separately from standard interrupts.

 */

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <asm/irq_cpu.h>

#include <asm/mipsregs.h>

#include <asm/system.h>

static inline void unmask_rm7k_irq(unsigned int irq)

{

        set_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE));

}

static inline void mask_rm7k_irq(unsigned int irq)

{

        clear_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE));

}

static struct irq_chip rm7k_irq_controller = {

        .name = "RM7000",

        .ack = mask_rm7k_irq,

        .mask = mask_rm7k_irq,

        .mask_ack = mask_rm7k_irq,

        .unmask = unmask_rm7k_irq,

};

void __init rm7k_cpu_irq_init(void)

{

        int base = RM7K_CPU_IRQ_BASE;

        int i;

        clear_c0_intcontrol(0x00000f00);                /* Mask all */

        for (i = base; i < base + 4; i++)

                set_irq_chip_and_handler(i, &rm7k_irq_controller,

                                         handle_percpu_irq);

}