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irqchip: gic: Use mask field in GICC_IAR

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Bit[9:0] is interrupt ID field in GICC_IAR. Bit[12:10] is CPU ID field,
and others are reserved.

So we should use GICC_IAR_INT_ID_MASK to get interrupt ID. It's not a good way
to use ~0x1c00 (CPU ID field) to get interrupt ID.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Link: https://lkml.kernel.org/r/1399795571-17231-3-git-send-email-haojian.zhuang@linaro.org
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Haojian Zhuang 2014-05-11 16:05:58 +08:00 committed by Jason Cooper
parent c9eaa447e7
commit b8802f76fe
2 changed files with 3 additions and 1 deletions
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2
drivers/irqchip/irq-gic.c
View File

@ -287,7 +287,7 @@ static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
do {
irqstat = readl_relaxed(cpu_base + GIC_CPU_INTACK);
irqnr = irqstat & ~0x1c00;
irqnr = irqstat & GICC_IAR_INT_ID_MASK;
if (likely(irqnr > 15 && irqnr < 1021)) {
irqnr = irq_find_mapping(gic->domain, irqnr);

2
include/linux/irqchip/arm-gic.h
View File

@ -21,6 +21,8 @@
#define GIC_CPU_ACTIVEPRIO 0xd0
#define GIC_CPU_IDENT 0xfc
#define GICC_IAR_INT_ID_MASK 0x3ff
#define GIC_DIST_CTRL 0x000
#define GIC_DIST_CTR 0x004
#define GIC_DIST_IGROUP 0x080