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/*
 * 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 */

Filemanager

Name Type Size Permission Actions
arm-gic-common.h File 825 B 0644
arm-gic-v3.h File 22.39 KB 0644
arm-gic-v4.h File 3.1 KB 0644
arm-gic.h File 5.38 KB 0644
arm-vic.h File 1.4 KB 0644
chained_irq.h File 1.44 KB 0644
ingenic.h File 759 B 0644
irq-bcm2836.h File 2.34 KB 0644
irq-omap-intc.h File 977 B 0644
irq-partition-percpu.h File 1.71 KB 0644
irq-sa11x0.h File 502 B 0644
metag-ext.h File 861 B 0644
metag.h File 485 B 0644
mmp.h File 155 B 0644
mxs.h File 367 B 0644
versatile-fpga.h File 353 B 0644
xtensa-mx.h File 467 B 0644
xtensa-pic.h File 532 B 0644