root/include/linux/irqchip/chained_irq.h

/* [<][>][^][v][top][bottom][index][help] */

INCLUDED FROM

DEFINITIONS

This source file includes following definitions.
  1. chained_irq_enter
  2. chained_irq_exit
/*
 * Chained IRQ handlers support.
 *
 * Copyright (C) 2011 ARM Ltd.
 *
 * This program is free software: you can redistribute 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 that 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, see <http://www.gnu.org/licenses/>.
 */
#ifndef __IRQCHIP_CHAINED_IRQ_H
#define __IRQCHIP_CHAINED_IRQ_H

#include <linux/irq.h>

/*
 * Entry/exit functions for chained handlers where the primary IRQ chip
 * may implement either fasteoi or level-trigger flow control.
 */
static inline void chained_irq_enter(struct irq_chip *chip,
                                     struct irq_desc *desc)
{
        /* FastEOI controllers require no action on entry. */
        if (chip->irq_eoi)
                return;

        if (chip->irq_mask_ack) {
                chip->irq_mask_ack(&desc->irq_data);
        } else {
                chip->irq_mask(&desc->irq_data);
                if (chip->irq_ack)
                        chip->irq_ack(&desc->irq_data);
        }
}

static inline void chained_irq_exit(struct irq_chip *chip,
                                    struct irq_desc *desc)
{
        if (chip->irq_eoi)
                chip->irq_eoi(&desc->irq_data);
        else
                chip->irq_unmask(&desc->irq_data);
}

#endif /* __IRQCHIP_CHAINED_IRQ_H */
/* [<][>][^][v][top][bottom][index][help] */