From 24bf11eca11947d961cc9bb5f7d92dabff169e93 Mon Sep 17 00:00:00 2001 From: Sebastian Huber 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/virtex4/startup/bspstart.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'c/src/lib/libbsp/powerpc/virtex4') diff --git a/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c b/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c index 6469979938..7628e8d3b9 100644 --- a/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c +++ b/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c @@ -57,6 +57,7 @@ #include #include #include +#include #include #include @@ -199,6 +200,7 @@ void bsp_start(void) bsp_timer_internal_clock = true; bsp_timer_average_overhead = 2; bsp_timer_least_valid = 3; + rtems_counter_initialize_converter(bsp_clicks_per_usec * 1000000); /* * Initialize the interrupt related settings. -- cgit v1.2.3