linux-imx

/*

 * Xtensa built-in interrupt controller

 *

 * Copyright (C) 2002 - 2013 Tensilica, Inc.

 * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Chris Zankel <chris@zankel.net>

 * Kevin Chea

 */

​

#include <linux/interrupt.h>

#include <linux/irqdomain.h>

#include <linux/irq.h>

#include <linux/irqchip.h>

#include <linux/of.h>

​

unsigned int cached_irq_mask;

​

/*

 * Device Tree IRQ specifier translation function which works with one or

 * two cell bindings. First cell value maps directly to the hwirq number.

 * Second cell if present specifies whether hwirq number is external (1) or

 * internal (0).

 */

static int xtensa_pic_irq_domain_xlate(struct irq_domain *d,

        struct device_node *ctrlr,

        const u32 *intspec, unsigned int intsize,

        unsigned long *out_hwirq, unsigned int *out_type)

{

    return xtensa_irq_domain_xlate(intspec, intsize,

            intspec[0], intspec[0],

            out_hwirq, out_type);

}

​

static const struct irq_domain_ops xtensa_irq_domain_ops = {

    .xlate = xtensa_pic_irq_domain_xlate,

    .map = xtensa_irq_map,

};

​

static void xtensa_irq_mask(struct irq_data *d)

{

    cached_irq_mask &= ~(1 << d->hwirq);

    xtensa_set_sr(cached_irq_mask, intenable);

}

​

static void xtensa_irq_unmask(struct irq_data *d)

{

    cached_irq_mask |= 1 << d->hwirq;

    xtensa_set_sr(cached_irq_mask, intenable);

}

​

static void xtensa_irq_enable(struct irq_data *d)

{

    xtensa_irq_unmask(d);

}

​

static void xtensa_irq_disable(struct irq_data *d)

{

    xtensa_irq_mask(d);