From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 03/16] ARM: GIC: Add global gic_handle_irq() function
Date: Mon, 26 Sep 2011 12:02:22 +0100 [thread overview]
Message-ID: <1317034955-1029-4-git-send-email-marc.zyngier@arm.com> (raw)
In-Reply-To: <1317034955-1029-1-git-send-email-marc.zyngier@arm.com>
Provide the GIC code with a low level handler that can be used
by platforms using CONFIG_MULTI_IRQ_HANDLER. Though the handler is
written in C, the compiled code doesn't feel much slower than its
assembly counterpart (at least with my gcc 4.4.1).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/common/gic.c | 23 +++++++++++++++++++++++
arch/arm/include/asm/hardware/gic.h | 1 +
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index a3f335c..5a22896 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -209,6 +209,29 @@ static int gic_set_wake(struct irq_data *d, unsigned int on)
#define gic_set_wake NULL
#endif
+asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
+{
+ u32 irqstat, irqnr;
+
+ do {
+ irqstat = readl_relaxed(gic_cpu_base_addr + GIC_CPU_INTACK);
+ irqnr = irqstat & ~0x1c00;
+
+ if (likely(irqnr > 15 && irqnr < 1021)) {
+ handle_IRQ(irqnr, regs);
+ continue;
+ }
+ if (irqnr < 16) {
+ writel_relaxed(irqstat, gic_cpu_base_addr + 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)
{
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 2dadd50..45e4ab4 100644
--- a/arch/arm/include/asm/hardware/gic.h
+++ b/arch/arm/include/asm/hardware/gic.h
@@ -38,6 +38,7 @@ 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_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:[~2011-09-26 11:02 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-26 11:02 [PATCH v2 00/16] Switch GIC users (and omap2plus) to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 01/16] ARM: Make global handler and CONFIG_MULTI_IRQ_HANDLER mutually exclusive Marc Zyngier
2011-09-28 1:00 ` Tony Lindgren
2011-09-26 11:02 ` [PATCH v2 02/16] ARM: smp: Add an IPI handler callable from C code Marc Zyngier
2011-09-28 1:01 ` Tony Lindgren
2011-09-26 11:02 ` Marc Zyngier [this message]
2011-09-28 1:01 ` [PATCH v2 03/16] ARM: GIC: Add global gic_handle_irq() function Tony Lindgren
2011-09-26 11:02 ` [PATCH v2 04/16] ARM: RealView: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 05/16] ARM: VExpress: " Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 06/16] ARM: msm: convert SMP platforms " Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 07/16] ARM: GIC: Add global gic_handle_irq_offset() function Marc Zyngier
2011-09-28 15:50 ` Rob Herring
2011-09-29 8:53 ` Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 08/16] ARM: exynos4: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 09/16] ARM: tegra2: " Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 10/16] ARM: ux500: " Marc Zyngier
2011-09-27 11:47 ` Linus Walleij
2011-09-27 12:33 ` Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 11/16] ARM: shmobile: convert smp platforms to gic_handle_irq() Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 12/16] ARM: cns3xxx: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 13/16] ARM: zynq: " Marc Zyngier
2011-09-26 11:02 ` [PATCH v2 14/16] ARM: omap2/3: Add global omap2/3_intc_handle_irq() functions Marc Zyngier
2011-09-28 1:02 ` Tony Lindgren
2011-09-26 11:02 ` [PATCH v2 15/16] ARM: omap2plus: convert to CONFIG_MULTI_IRQ_HANDLER Marc Zyngier
2011-09-28 1:04 ` Tony Lindgren
2011-09-26 11:02 ` [PATCH v2 16/16] ARM: GIC: Make MULTI_IRQ_HANDLER mandatory Marc Zyngier
2011-09-27 3:43 ` Shawn Guo
2011-09-27 8:32 ` Marc Zyngier
2011-09-27 10:19 ` Shawn Guo
2011-09-28 1:04 ` Tony Lindgren
2011-09-26 20:20 ` [PATCH v2 00/16] Switch GIC users (and omap2plus) to CONFIG_MULTI_IRQ_HANDLER David Brown
2011-09-27 0:15 ` David Brown
2011-09-27 8:58 ` Marc Zyngier
2011-09-27 10:20 ` Shawn Guo
2011-09-27 10:22 ` Marc Zyngier
2011-09-27 23:53 ` Tony Lindgren
2011-09-28 0:53 ` Tony Lindgren
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