From: Dirk Behme <dirk.be...@de.bosch.com>
Several ARM timer implementations use gd->arch.tbl to record the
absolute tick count of 32-bit counters, including timer overflows.
For example arch/arm/imx-common/timer.c does:
ulong lastinc;
ulong now = counter value;
if (no overflow) {
...
} else { /* counter overflow */
gd->arch.tbl += (0xFFFFFFFF - lastinc) + now;
}
lastinc = now;
As we use a 32-bit counter and the two ulong (32-bit) variables 'lastinc'
and 'now' here, gd->arch.tbl should be long long (64-bit) to not overflow
at the same time, too.
Signed-off-by: Knut Wohlrab <knut.wohl...@de.bosch.com>
Signed-off-by: Dirk Behme <dirk.be...@de.bosch.com>
---
arch/arm/include/asm/global_data.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/global_data.h
b/arch/arm/include/asm/global_data.h
index 37ac0da..1099af9 100644
--- a/arch/arm/include/asm/global_data.h
+++ b/arch/arm/include/asm/global_data.h
@@ -41,7 +41,7 @@ struct arch_global_data {
/* "static data" needed by most of timer.c on ARM platforms */
unsigned long timer_rate_hz;
unsigned long tbu;
- unsigned long tbl;
+ unsigned long long tbl;
unsigned long lastinc;
unsigned long long timer_reset_value;
#ifdef CONFIG_IXP425
--
1.7.10.4
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