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/haleakala/startup/bspstart.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'c/src/lib/libbsp/powerpc/haleakala')

diff --git a/c/src/lib/libbsp/powerpc/haleakala/startup/bspstart.c b/c/src/lib/libbsp/powerpc/haleakala/startup/bspstart.c
index 078a469d47..fc7e932b28 100644
--- a/c/src/lib/libbsp/powerpc/haleakala/startup/bspstart.c
+++ b/c/src/lib/libbsp/powerpc/haleakala/startup/bspstart.c
@@ -59,6 +59,8 @@
 #include <string.h>
 #include <fcntl.h>
 
+#include <rtems/counter.h>
+
 #include <bsp.h>
 #include <bsp/uart.h>
 #include <bsp/irq.h>
@@ -194,6 +196,7 @@ void bsp_start( void )
   /* Set globals visible to clock.c */
   /* timebase register ticks/microsecond = CPU Clk in MHz */
   bsp_clicks_per_usec = 400;
+  rtems_counter_initialize_converter(bsp_clicks_per_usec * 1000000);
 
   bsp_timer_internal_clock  = TRUE;
   bsp_timer_average_overhead = 2;
-- 
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