linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * Root interrupt controller for the BCM2836 (Raspberry Pi 2).

 *

 * Copyright 2015 Broadcom

 */

​

#include <linux/cpu.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/irqchip.h>

#include <linux/irqdomain.h>

#include <linux/irqchip/irq-bcm2836.h>

​

#include <asm/exception.h>

​

struct bcm2836_arm_irqchip_intc {

    struct irq_domain *domain;

    void __iomem *base;

};

​

static struct bcm2836_arm_irqchip_intc intc  __read_mostly;

​

static void bcm2836_arm_irqchip_mask_per_cpu_irq(unsigned int reg_offset,

                         unsigned int bit,

                         int cpu)

{

    void __iomem *reg = intc.base + reg_offset + 4 * cpu;

​

    writel(readl(reg) & ~BIT(bit), reg);

}

​

static void bcm2836_arm_irqchip_unmask_per_cpu_irq(unsigned int reg_offset,

                           unsigned int bit,

                         int cpu)

{

    void __iomem *reg = intc.base + reg_offset + 4 * cpu;

​

    writel(readl(reg) | BIT(bit), reg);

}

​

static void bcm2836_arm_irqchip_mask_timer_irq(struct irq_data *d)

{

    bcm2836_arm_irqchip_mask_per_cpu_irq(LOCAL_TIMER_INT_CONTROL0,

                         d->hwirq - LOCAL_IRQ_CNTPSIRQ,

                         smp_processor_id());

}

​

static void bcm2836_arm_irqchip_unmask_timer_irq(struct irq_data *d)

{

    bcm2836_arm_irqchip_unmask_per_cpu_irq(LOCAL_TIMER_INT_CONTROL0,

                           d->hwirq - LOCAL_IRQ_CNTPSIRQ,

                           smp_processor_id());

}

​

static struct irq_chip bcm2836_arm_irqchip_timer = {

    .name       = "bcm2836-timer",

    .irq_mask   = bcm2836_arm_irqchip_mask_timer_irq,

    .irq_unmask = bcm2836_arm_irqchip_unmask_timer_irq,

};

​

static void bcm2836_arm_irqchip_mask_pmu_irq(struct irq_data *d)

{