From mboxrd@z Thu Jan  1 00:00:00 1970
From: adharmap@codeaurora.org
Subject: [PATCH 2/5] gic: add callback for mask_ack
Date: Wed, 27 Jan 2010 11:32:26 -0800
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Cc: Kalle Valo <kalle.valo@iki.fi>, Russell King <linux@arm.linux.org.uk>, Linus Walleij <linus.walleij@stericsson.com>, Jean Pihet <jpihet@mvista.com>, Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>, Tony Lindgren <tony@atomide.com>, Catalin Marinas <catalin.marinas@arm.com>, Abhijeet Dharmapurikar <adharmap@quicinc.com>, linux-kernel@vger.kernel.org, Kevin Hilman <khilman@deeprootsystems.com>, Santosh Shilimkar <santosh.shilimkar@ti.com>, Andrea Gallo <andrea.gallo@stericsson.com>, Colin Tuckley <colin.tuckley@arm.com>, Ingo Molnar <mingo@elte.hu>, linux-omap@vger.kernel.org, Yinghai Lu <yinghai@kernel.org>, Philby John <pjohn@in.mvista.com>, Alessandro Rubini <rubini@unipv.it>
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From: Abhijeet Dharmapurikar <adharmap@quicinc.com>

add gic_mask_ack for faster processing of interrupts.

Signed-off-by: Abhijeet Dharmapurikar <adharmap@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 e763c4c..00172c4 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