[rtems commit] bsps/arm: Fix Cortex-A9 MPCore nanoseconds handler

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    a3b1fcd977c79bf2134b9d1e794112f29ecc0879
Changeset: http://git.rtems.org/rtems/commit/?id=a3b1fcd977c79bf2134b9d1e794112f29ecc0879

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Thu Nov 14 15:55:51 2013 +0100

bsps/arm: Fix Cortex-A9 MPCore nanoseconds handler

---

 .../libbsp/arm/shared/arm-a9mpcore-clock-config.c  |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c b/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c
index b5c8ecb..dbd720a 100644
--- a/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c
+++ b/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c
@@ -88,7 +88,7 @@ static uint32_t a9mpcore_clock_nanoseconds_since_last_tick(void)
   uint32_t p = pt->load + 1;
 
   if ((pt->irqst & A9MPCORE_PT_IRQST_EFLG) != 0) {
-    c = pt->cntr + p;
+    c = pt->cntr - p;
   }
 
   return (uint32_t) (((p - c) * k) >> 32);