| Message ID | 1398668032-8335-5-git-send-email-haojian.zhuang@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Apr 28 2014 at 7:53:42 am BST, Haojian Zhuang <haojian.zhuang@linaro.org> wrote: > 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_INTID 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> > --- > drivers/irqchip/irq-gic.c | 2 +- > include/linux/irqchip/arm-gic.h | 2 ++ > 2 files changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c > index 4300b66..8fd27bf 100644 > --- a/drivers/irqchip/irq-gic.c > +++ b/drivers/irqchip/irq-gic.c > @@ -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_INTID; > > if (likely(irqnr > 15 && irqnr < 1021)) { > irqnr = irq_find_mapping(gic->domain, irqnr); > diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h > index 7ed92d0..55933aa 100644 > --- a/include/linux/irqchip/arm-gic.h > +++ b/include/linux/irqchip/arm-gic.h > @@ -21,6 +21,8 @@ > #define GIC_CPU_ACTIVEPRIO 0xd0 > #define GIC_CPU_IDENT 0xfc > > +#define GICC_IAR_INTID 0x3ff This is actually a mask, so I'd suggest to reflect this in the name. GICC_IAR_INT_ID_MASK? > + > #define GIC_DIST_CTRL 0x000 > #define GIC_DIST_CTR 0x004 > #define GIC_DIST_IGROUP 0x080 M.
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 4300b66..8fd27bf 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -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_INTID; if (likely(irqnr > 15 && irqnr < 1021)) { irqnr = irq_find_mapping(gic->domain, irqnr); diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h index 7ed92d0..55933aa 100644 --- a/include/linux/irqchip/arm-gic.h +++ b/include/linux/irqchip/arm-gic.h @@ -21,6 +21,8 @@ #define GIC_CPU_ACTIVEPRIO 0xd0 #define GIC_CPU_IDENT 0xfc +#define GICC_IAR_INTID 0x3ff + #define GIC_DIST_CTRL 0x000 #define GIC_DIST_CTR 0x004 #define GIC_DIST_IGROUP 0x080
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_INTID 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> --- drivers/irqchip/irq-gic.c | 2 +- include/linux/irqchip/arm-gic.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-)