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From: adharmap on 29 Jan 2010 02:10
From: Abhijeet Dharmapurikar <adharmap(a)quicinc.com>

Add gic_mask_ack for faster processing of interrupts.

Signed-off-by: Abhijeet Dharmapurikar <adharmap(a)quicinc.com>
---
arch/arm/common/gic.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index 8a2bfae..240f6b6 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -108,6 +108,15 @@ static void gic_unmask_irq(unsigned int irq)
spin_unlock(&irq_controller_lock);
}

+static void gic_mask_ack_irq(unsigned int irq)
+{
+ u32 mask = 1 << (irq % 32);
+ spin_lock(&irq_controller_lock);
+ writel(mask, gic_dist_base(irq) + GIC_DIST_ENABLE_CLEAR + (gic_irq(irq) / 32) * 4);
+ writel(gic_irq(irq), gic_cpu_base(irq) + GIC_CPU_EOI);
+ spin_unlock(&irq_controller_lock);
+}
+
#ifdef CONFIG_SMP
static int gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
{
@@ -160,6 +169,7 @@ static struct irq_chip gic_chip = {
.name = "GIC",
.ack = gic_ack_irq,
.mask = gic_mask_irq,
+ .mask_ack = gic_mask_ack_irq,
.unmask = gic_unmask_irq,
#ifdef CONFIG_SMP
.set_affinity = gic_set_cpu,
--
1.5.6.3

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Prev: [PATCH v2 2/4] GIC: Prevent gic from crossing NR_IRQS
Next: hw_breakpoint fix