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Commit e0d00a41 authored by Patrick Daly's avatar Patrick Daly Committed by Prasad Sodagudi
Browse files

irqchip: gic: Add panic handler to save registers 



Save gic distributor registers on panic.

CRs-Fixed: 880988
Change-Id: I7e7e3a39ad31931b51611fd37dab511ca6adde98
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
Signed-off-by: default avatarPrasad Sodagudi <psodagud@codeaurora.org>
parent b968b8b0

drivers/irqchip/irq-gic.c

+18 −0
Original line number Diff line number Diff line
@@ -76,6 +76,7 @@ struct gic_chip_data { 
	unsigned int wakeup_irqs[32];

	unsigned int enabled_irqs[32];

#endif

	u32 saved_regs[0x400];

};



static DEFINE_RAW_SPINLOCK(irq_controller_lock);
@@ -180,6 +181,22 @@ static void gic_disable_irq(struct irq_data *d) 
		gic_arch_extn.irq_disable(d);

}



static int gic_panic_handler(struct notifier_block *this,

			unsigned long event, void *ptr)

{

	int i;

	void __iomem *base;



	base = gic_data_dist_base(&gic_data[0]);

	for (i = 0; i < 0x400; i += 1)

		gic_data[0].saved_regs[i] = readl_relaxed(base + 4 * i);

	return NOTIFY_DONE;

}



static struct notifier_block gic_panic_blk = {

	.notifier_call = gic_panic_handler,

};



#ifdef CONFIG_PM

static int gic_suspend_one(struct gic_chip_data *gic)

{
@@ -1202,6 +1219,7 @@ gic_of_init(struct device_node *node, struct device_node *parent) 
		gic_cascade_irq(gic_cnt, irq);

	}

	gic_cnt++;

	atomic_notifier_chain_register(&panic_notifier_list, &gic_panic_blk);

	return 0;

}

IRQCHIP_DECLARE(gic_400, "arm,gic-400", gic_of_init);