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ARM: GIC: Add global gic_handle_irq() function 

Provide the GIC code with a low level handler that can be used
by platforms using CONFIG_MULTI_IRQ_HANDLER.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2011-09-06 09:56:17 +01:00
parent baeeb8229c
commit 562e0027d2
2 changed files with 28 additions and 0 deletions
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27
arch/arm/common/gic.c
View File

@ -40,6 +40,7 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <asm/irq.h> #include <asm/irq.h>
#include <asm/exception.h>
#include <asm/mach/irq.h> #include <asm/mach/irq.h>
#include <asm/hardware/gic.h> #include <asm/hardware/gic.h>
@ -272,6 +273,32 @@ static int gic_set_wake(struct irq_data *d, unsigned int on)
#define gic_set_wake NULL #define gic_set_wake NULL
#endif #endif
asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
{
u32 irqstat, irqnr;
struct gic_chip_data *gic = &gic_data[0];
void __iomem *cpu_base = gic_data_cpu_base(gic);
do {
irqstat = readl_relaxed(cpu_base + GIC_CPU_INTACK);
irqnr = irqstat & ~0x1c00;
if (likely(irqnr > 15 && irqnr < 1021)) {
irqnr = irq_domain_to_irq(&gic->domain, irqnr);
handle_IRQ(irqnr, regs);
continue;
}
if (irqnr < 16) {
writel_relaxed(irqstat, cpu_base + GIC_CPU_EOI);
#ifdef CONFIG_SMP
handle_IPI(irqnr, regs);
#endif
continue;
}
break;
} while (1);
}
static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
{ {
struct gic_chip_data *chip_data = irq_get_handler_data(irq); struct gic_chip_data *chip_data = irq_get_handler_data(irq);

1
arch/arm/include/asm/hardware/gic.h
View File

@ -43,6 +43,7 @@ void gic_init_bases(unsigned int, int, void __iomem *, void __iomem *,
u32 offset); u32 offset);
int gic_of_init(struct device_node *node, struct device_node *parent); int gic_of_init(struct device_node *node, struct device_node *parent);
void gic_secondary_init(unsigned int); void gic_secondary_init(unsigned int);
void gic_handle_irq(struct pt_regs *regs);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq); void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq); void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);