From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 05/14] ARM: GIC: Add global gic_handle_irq_offset() function
Date: Fri, 23 Sep 2011 17:51:23 +0100 [thread overview]
Message-ID: <1316796692-15964-6-git-send-email-marc.zyngier@arm.com> (raw)
In-Reply-To: <1316796692-15964-1-git-send-email-marc.zyngier@arm.com>
Similar to gic_handle_irq(), gic_handle_irq_offset() is provided
for those platform who insist on having their GIC base interrupt
at something different from zero. At the moment, Exynos4 is the
only one...
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/common/gic.c | 24 ++++++++++++++++++++++++
arch/arm/include/asm/hardware/gic.h | 1 +
2 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index a7b2a4a..ea8bfc5 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -232,6 +232,30 @@ asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
} while (1);
}
+asmlinkage void __exception_irq_entry gic_handle_irq_offset(struct pt_regs *regs)
+{
+ u32 irqstat, irqnr;
+ u32 offset = gic_data[0].irq_offset;
+
+ do {
+ irqstat = readl_relaxed(gic_cpu_base_addr + GIC_CPU_INTACK);
+ irqnr = irqstat & ~0x1c00;
+
+ if (likely(irqnr > 15 && irqnr < 1021)) {
+ handle_IRQ(irqnr + offset, regs);
+ continue;
+ }
+ if (irqnr < 16) {
+ writel_relaxed(irqstat, gic_cpu_base_addr + GIC_CPU_EOI);
+#ifdef CONFIG_SMP
+ do_IPI(irqnr, regs);
+#endif
+ continue;
+ }
+ break;
+ } while (1);
+}
+
static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
{
struct gic_chip_data *chip_data = irq_get_handler_data(irq);
diff --git a/arch/arm/include/asm/hardware/gic.h b/arch/arm/include/asm/hardware/gic.h
index 45e4ab4..0f454c6 100644
--- a/arch/arm/include/asm/hardware/gic.h
+++ b/arch/arm/include/asm/hardware/gic.h
@@ -39,6 +39,7 @@ extern struct irq_chip gic_arch_extn;
void gic_init(unsigned int, unsigned int, void __iomem *, void __iomem *);
void gic_secondary_init(unsigned int);
void gic_handle_irq(struct pt_regs *regs);
+void gic_handle_irq_offset(struct pt_regs *regs);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);
--
1.7.0.4
next prev parent reply other threads:[~2011-09-23 16:51 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-23 16:51 [RFC PATCH 00/14] Switch GIC users (and omap2plus) to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 01/14] ARM: GIC: Add global gic_handle_irq() function Marc Zyngier
2011-09-23 20:18 ` Russell King - ARM Linux
2011-09-26 10:40 ` Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 02/14] ARM: RealView: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 03/14] ARM: VExpress: " Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 04/14] ARM: msm: convert SMP platforms " Marc Zyngier
2011-09-23 16:51 ` Marc Zyngier [this message]
2011-09-23 16:51 ` [RFC PATCH 06/14] ARM: exynos4: convert " Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 07/14] ARM: tegra2: " Marc Zyngier
2011-09-23 17:28 ` Stephen Warren
2011-09-23 16:51 ` [RFC PATCH 08/14] ARM: ux500: " Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 09/14] ARM: shmobile: convert smp platforms to gic_handle_irq() Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 10/14] ARM: cns3xxx: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-26 13:15 ` Anton Vorontsov
2011-09-23 16:51 ` [RFC PATCH 11/14] ARM: zynq: " Marc Zyngier
2011-09-23 20:53 ` John Linn
2011-09-23 16:51 ` [RFC PATCH 12/14] ARM: omap2/3: Add global omap2/3_intc_handle_irq() functions Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 13/14] ARM: omap2plus: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-23 16:51 ` [RFC PATCH 14/14] ARM: GIC: Make MULTI_IRQ_HANDLER mandatory Marc Zyngier
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