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authorSebastian Huber <sebastian.huber@embedded-brains.de>2014-02-12 10:31:38 +0100
committerSebastian Huber <sebastian.huber@embedded-brains.de>2014-02-14 10:28:29 +0100
commit24bf11eca11947d961cc9bb5f7d92dabff169e93 (patch)
treeb28f3aa8a21df91e8feaf324613aa76460559837 /c/src/lib/libbsp/powerpc/mbx8xx
parent382ea27b6a9b2952c541ec7f600517181a4431e2 (diff)
downloadrtems-24bf11eca11947d961cc9bb5f7d92dabff169e93.tar.bz2
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.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mbx8xx')
-rw-r--r--c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c b/c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c
index 09d4fab9b4..6216754184 100644
--- a/c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c
+++ b/c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c
@@ -19,6 +19,7 @@
#include <bsp.h>
#include <bsp/irq.h>
#include <rtems/bspIo.h>
+#include <rtems/counter.h>
#include <libcpu/cpuIdent.h>
#include <libcpu/spr.h>
#include <rtems/powerpc/powerpc.h>
@@ -142,6 +143,7 @@ void bsp_start(void)
#else
bsp_clicks_per_usec = 1; /* for 4MHz extclk */
#endif
+ rtems_counter_initialize_converter(bsp_clicks_per_usec * 1000000);
bsp_serial_per_sec = 10000000;
bsp_serial_external_clock = true;