Add _CPU_Counter_frequency()

Add rtems_counter_frequency() API function.  Use it to initialize the
counter value converter via the new system initialization step
(RTEMS_SYSINIT_CPU_COUNTER).  This decouples the counter implementation
and the counter converter.  It avoids an unnecessary pull in of the
64-bit integer division from libgcc.

Update #3456.

1 files changed, 4 insertions, 3 deletions

diff --git a/bsps/powerpc/virtex5/start/bspstart.c b/bsps/powerpc/virtex5/start/bspstart.c
index ff821574a9..6457143d20 100644
--- a/bsps/powerpc/virtex5/start/bspstart.c
+++ b/bsps/powerpc/virtex5/start/bspstart.c
@@ -144,6 +144,10 @@ void BSP_ask_for_reset(void)
   for(;;);
 }
 
+uint32_t _CPU_Counter_frequency(void)
+{
+  return BSP_bus_frequency / (BSP_time_base_divisor / 1000);
+}
 
 /*===================================================================*/
 
@@ -185,9 +189,6 @@ void bsp_start(void)
 
   /* Timebase register ticks/microsecond;  The application may override these */
   bsp_clicks_per_usec        = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
-  rtems_counter_initialize_converter(
-    BSP_bus_frequency / (BSP_time_base_divisor / 1000)
-  );
 
   /*
    * Initialize the interrupt related settings.