diff options
| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-02-12 10:31:38 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-02-14 10:28:29 +0100 |
| commit | 24bf11eca11947d961cc9bb5f7d92dabff169e93 (patch) | |
| tree | b28f3aa8a21df91e8feaf324613aa76460559837 /c/src/lib/libbsp/powerpc/beatnik | |
| parent | bsps/arm: Fix Cortex-A9 MPCore nanoseconds handler (diff) | |
| download | rtems-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/beatnik')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/beatnik/startup/bspstart.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/beatnik/startup/bspstart.c b/c/src/lib/libbsp/powerpc/beatnik/startup/bspstart.c index 9b5c7a7556..763c9d805e 100644 --- a/c/src/lib/libbsp/powerpc/beatnik/startup/bspstart.c +++ b/c/src/lib/libbsp/powerpc/beatnik/startup/bspstart.c @@ -31,6 +31,7 @@ #include <rtems/libio.h> #include <rtems/libcsupport.h> #include <rtems/bspIo.h> +#include <rtems/counter.h> #include <rtems/powerpc/powerpc.h> /*#include <bsp/consoleIo.h>*/ #include <libcpu/spr.h> /* registers.h is included here */ @@ -337,6 +338,9 @@ void bsp_start( void ) */ bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000); + rtems_counter_initialize_converter( + BSP_bus_frequency / (BSP_time_base_divisor / 1000) + ); #ifdef SHOW_MORE_INIT_SETTINGS printk( |