linux-imx

/*

 * Broadcom BCM7038 style Level 1 interrupt controller driver

 *

 * Copyright (C) 2014 Broadcom Corporation

 * Author: Kevin Cernekee

 *

 * 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.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME  ": " fmt

​

#include <linux/bitops.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/ioport.h>

#include <linux/irq.h>

#include <linux/irqdomain.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/of_address.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/smp.h>

#include <linux/types.h>

#include <linux/irqchip.h>

#include <linux/irqchip/chained_irq.h>

​

#define IRQS_PER_WORD       32

#define REG_BYTES_PER_IRQ_WORD  (sizeof(u32) * 4)

#define MAX_WORDS       8

​

struct bcm7038_l1_cpu;

​

struct bcm7038_l1_chip {

    raw_spinlock_t      lock;

    unsigned int        n_words;

    struct irq_domain   *domain;

    struct bcm7038_l1_cpu   *cpus[NR_CPUS];

    u8          affinity[MAX_WORDS * IRQS_PER_WORD];

};

​

struct bcm7038_l1_cpu {

    void __iomem        *map_base;

    u32         mask_cache[0];

};

​

/*

 * STATUS/MASK_STATUS/MASK_SET/MASK_CLEAR are packed one right after another:

 *

 * 7038:

 *   0x1000_1400: W0_STATUS

 *   0x1000_1404: W1_STATUS

 *   0x1000_1408: W0_MASK_STATUS

 *   0x1000_140c: W1_MASK_STATUS

 *   0x1000_1410: W0_MASK_SET

 *   0x1000_1414: W1_MASK_SET

 *   0x1000_1418: W0_MASK_CLEAR