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authorAlexander Shiyan <shc_work@mail.ru>2013-05-13 19:07:33 +0200
committerOlof Johansson <olof@lixom.net>2013-06-12 00:47:38 +0200
commit7dfbf1b68eb9eea411781ff9e610377febe4d6a2 (patch)
treeddbdd3b61ce70173f94ac5375c3226c49435f750 /arch/arm
parentARM: clps711x: Add clocksource framework (diff)
downloadlinux-7dfbf1b68eb9eea411781ff9e610377febe4d6a2.tar.xz
linux-7dfbf1b68eb9eea411781ff9e610377febe4d6a2.zip
ARM: clps711x: Optimize interrupt handling
This patch modify interrupt handler for processing all penging interrupts at once. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-clps711x/common.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/arch/arm/mach-clps711x/common.c b/arch/arm/mach-clps711x/common.c
index bd658398a819..f6d1746366d4 100644
--- a/arch/arm/mach-clps711x/common.c
+++ b/arch/arm/mach-clps711x/common.c
@@ -215,7 +215,7 @@ void __init clps711x_init_irq(void)
}
}
-inline u32 fls16(u32 x)
+static inline u32 fls16(u32 x)
{
u32 r = 15;
@@ -239,18 +239,24 @@ inline u32 fls16(u32 x)
asmlinkage void __exception_irq_entry clps711x_handle_irq(struct pt_regs *regs)
{
- u32 irqstat;
- void __iomem *base = CLPS711X_VIRT_BASE;
+ do {
+ u32 irqstat;
+ void __iomem *base = CLPS711X_VIRT_BASE;
+
+ irqstat = readw_relaxed(base + INTSR1) &
+ readw_relaxed(base + INTMR1);
+ if (irqstat)
+ handle_IRQ(fls16(irqstat), regs);
+
+ irqstat = readw_relaxed(base + INTSR2) &
+ readw_relaxed(base + INTMR2);
+ if (irqstat) {
+ handle_IRQ(fls16(irqstat) + 16, regs);
+ continue;
+ }
- irqstat = readl_relaxed(base + INTSR1) & readl_relaxed(base + INTMR1);
- if (irqstat) {
- handle_IRQ(fls16(irqstat), regs);
- return;
- }
-
- irqstat = readl_relaxed(base + INTSR2) & readl_relaxed(base + INTMR2);
- if (likely(irqstat))
- handle_IRQ(fls16(irqstat) + 16, regs);
+ break;
+ } while (1);
}
static u32 notrace clps711x_sched_clock_read(void)