[ARM] 3686/1: ARM: arm/common: convert irq handling
Patch from Thomas Gleixner
From: Thomas Gleixner <tglx@linutronix.de>
Convert the files in arch/arm/common to use the generic
irq handling functions.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index c02dc81..f3c1ebf 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -33,6 +33,7 @@
static void __iomem *gic_dist_base;
static void __iomem *gic_cpu_base;
+static DEFINE_SPINLOCK(irq_controller_lock);
/*
* Routines to acknowledge, disable and enable interrupts
@@ -52,32 +53,45 @@
static void gic_ack_irq(unsigned int irq)
{
u32 mask = 1 << (irq % 32);
+
+ spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
writel(irq, gic_cpu_base + GIC_CPU_EOI);
+ spin_unlock(&irq_controller_lock);
}
static void gic_mask_irq(unsigned int irq)
{
u32 mask = 1 << (irq % 32);
+
+ spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
+ spin_unlock(&irq_controller_lock);
}
static void gic_unmask_irq(unsigned int irq)
{
u32 mask = 1 << (irq % 32);
+
+ spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base + GIC_DIST_ENABLE_SET + (irq / 32) * 4);
+ spin_unlock(&irq_controller_lock);
}
#ifdef CONFIG_SMP
-static void gic_set_cpu(struct irqdesc *desc, unsigned int irq, unsigned int cpu)
+static void gic_set_cpu(unsigned int irq, cpumask_t mask_val)
{
void __iomem *reg = gic_dist_base + GIC_DIST_TARGET + (irq & ~3);
unsigned int shift = (irq % 4) * 8;
+ unsigned int cpu = first_cpu(mask_val);
u32 val;
+ spin_lock(&irq_controller_lock);
+ irq_desc[irq].cpu = cpu;
val = readl(reg) & ~(0xff << shift);
val |= 1 << (cpu + shift);
writel(val, reg);
+ spin_unlock(&irq_controller_lock);
}
#endif
@@ -86,7 +100,7 @@
.mask = gic_mask_irq,
.unmask = gic_unmask_irq,
#ifdef CONFIG_SMP
- .set_cpu = gic_set_cpu,
+ .set_affinity = gic_set_cpu,
#endif
};