From 24bf11eca11947d961cc9bb5f7d92dabff169e93 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Wed, 12 Feb 2014 10:31:38 +0100
Subject: score: Add CPU counter support

Add a CPU counter interface to allow access to a free-running counter.
It is useful to measure short time intervals.  This can be used for
example to enable profiling of critical low-level functions.

Add two busy wait functions rtems_counter_delay_ticks() and
rtems_counter_delay_nanoseconds() implemented via the CPU counter.
---
 c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c')

diff --git a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c
index 2d7debef1d..7f4f93524d 100644
--- a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c
+++ b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/bspstart.c
@@ -29,6 +29,7 @@
 
 #include <rtems.h>
 #include <rtems/config.h>
+#include <rtems/counter.h>
 
 #include <libcpu/powerpc-utility.h>
 #include <bsp/vectors.h>
@@ -103,6 +104,7 @@ void bsp_start(void)
 
 	/* Time reference value */
 	bsp_clicks_per_usec = bsp_clock_speed / 1000000;
+	rtems_counter_initialize_converter(bsp_clock_speed);
 
 	/* Initialize exceptions */
 	ppc_exc_initialize_with_vector_base(
-- 
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