ARM: gic: Add support for logging interrupts in RTB
To help with the debug of interrupt storms and problems during IRQ
handling, log the IRQ number in RTB for each interrupt that fires.
Change-Id: I479f8cc032b269f3d43d939419e346528d4f909e
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index b4574aa..497ed9d 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -48,6 +48,7 @@
#include <asm/system.h>
#include <mach/socinfo.h>
+#include <mach/msm_rtb.h>
union gic_base {
void __iomem *common_base;
@@ -442,6 +443,7 @@
if (likely(irqnr > 15 && irqnr < 1021)) {
irqnr = irq_find_mapping(gic->domain, irqnr);
handle_IRQ(irqnr, regs);
+ uncached_logk(LOGK_IRQ, (void *)(uintptr_t)irqnr);
continue;
}
if (irqnr < 16) {
@@ -452,6 +454,7 @@
raw_spin_unlock(&irq_controller_lock);
#ifdef CONFIG_SMP
handle_IPI(irqnr, regs);
+ uncached_logk(LOGK_IRQ, (void *)(uintptr_t)irqnr);
#endif
continue;
}
diff --git a/arch/arm/mach-msm/include/mach/msm_rtb.h b/arch/arm/mach-msm/include/mach/msm_rtb.h
index b33e8b6..c419a3d 100644
--- a/arch/arm/mach-msm/include/mach/msm_rtb.h
+++ b/arch/arm/mach-msm/include/mach/msm_rtb.h
@@ -27,6 +27,7 @@
LOGK_TIMESTAMP = 6,
LOGK_L2CPREAD = 7,
LOGK_L2CPWRITE = 8,
+ LOGK_IRQ = 9,
};
#define LOGTYPE_NOPC 0x80