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Subject[PATCH 6/8] ARM: VIC: Add a couple of low-level FIQ management helpers
Date
Just a couple of calls to manage VIC FIQ routing. We'll use them for
KGDB FIQ support on ARM Versatile machines.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
---
arch/arm/common/vic.c | 28 ++++++++++++++++++++++++++++
arch/arm/include/asm/hardware/vic.h | 2 ++
2 files changed, 30 insertions(+)
diff --git a/arch/arm/common/vic.c b/arch/arm/common/vic.c
index e0d5388..df2fc82 100644
--- a/arch/arm/common/vic.c
+++ b/arch/arm/common/vic.c
@@ -66,6 +66,34 @@ static struct vic_device vic_devices[CONFIG_ARM_VIC_NR];

static int vic_id;

+static void __iomem *vic_base(struct irq_data *d)
+{
+ return (void __iomem *)irq_data_get_irq_chip_data(d);
+}
+
+void vic_fiq_select(unsigned int irq, bool on)
+{
+ void __iomem *base = vic_base(&irq_to_desc(irq)->irq_data);
+ void __iomem *sel = base + VIC_INT_SELECT;
+ u32 msk = 1 << irq;
+ u32 val;
+
+ pr_debug("rerouting VIC vector %d to %s\n", irq, on ? "FIQ" : "IRQ");
+
+ val = readl(sel);
+ val &= ~msk;
+ if (on)
+ val |= msk;
+ writel(val, sel);
+}
+
+bool vic_is_fiq_rised(unsigned int irq)
+{
+ void __iomem *base = vic_base(&irq_to_desc(irq)->irq_data);
+
+ return readl(base + VIC_FIQ_STATUS) & (1 << irq);
+}
+
/**
* vic_init2 - common initialisation code
* @base: Base of the VIC.
diff --git a/arch/arm/include/asm/hardware/vic.h b/arch/arm/include/asm/hardware/vic.h
index e14af1a..2728975 100644
--- a/arch/arm/include/asm/hardware/vic.h
+++ b/arch/arm/include/asm/hardware/vic.h
@@ -52,6 +52,8 @@ void __vic_init(void __iomem *base, unsigned int irq_start, u32 vic_sources,
void vic_init(void __iomem *base, unsigned int irq_start, u32 vic_sources, u32 resume_sources);
int vic_of_init(struct device_node *node, struct device_node *parent);
void vic_handle_irq(struct pt_regs *regs);
+void vic_fiq_select(unsigned int irq, bool on);
+bool vic_is_fiq_rised(unsigned int irq);

#endif /* __ASSEMBLY__ */
#endif
--
1.7.10.4


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