1 files changed, 83 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mrm332/timer/timer.c b/c/src/lib/libbsp/m68k/mrm332/timer/timer.c
new file mode 100644
index 0000000000..7fa8f3b718
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/mrm332/timer/timer.c
@@ -0,0 +1,83 @@
+/*  Timer_init()
+ *
+ *  This routine initializes a timer in efi68k's DP8570A TCP
+ *
+ *  Input parameters:  NONE
+ *
+ *  Output parameters:  NONE
+ *
+ *  NOTE: It is important that the timer start/stop overhead be 
+ *        determined when porting or modifying this code.
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+
+#include <bsp.h>
+
+rtems_boolean Timer_driver_Find_average_overhead;
+
+extern rtems_isr Clock_isr();
+
+void Timer_initialize( void )
+{
+}
+
+/*
+ *  The following controls the behavior of Read_timer().
+ *
+ *  FIND_AVG_OVERHEAD *  instructs the routine to return the "raw" count.
+ *
+ *  AVG_OVEREHAD is the overhead for starting and stopping the timer.  It
+ *  is usually deducted from the number returned.
+ *
+ *  LEAST_VALID is the lowest number this routine should trust.  Numbers
+ *  below this are "noise" and zero is returned.
+ */
+
+#define AVG_OVERHEAD      0  /* It typically takes X.X microseconds */
+                             /* (Y countdowns) to start/stop the timer. */
+                             /* This value is in microseconds. */
+#define LEAST_VALID       1  /* Don't trust a clicks value lower than this */
+
+/*
+ * Return timer value in 1/2-microsecond units
+ */
+int Read_timer( void )
+{
+  rtems_unsigned32 total;
+  total = 0;
+
+  if ( Timer_driver_Find_average_overhead == 1 )
+    return total;          /* in XXX microsecond units */
+
+  if ( total < LEAST_VALID )
+    return 0;            /* below timer resolution */
+
+  return (total - AVG_OVERHEAD);
+}
+
+
+/*
+ *  Empty function call used in loops to measure basic cost of looping
+ *  in Timing Test Suite.
+ */
+
+rtems_status_code Empty_function(void)
+{
+    return RTEMS_SUCCESSFUL;
+}
+
+void Set_find_average_overhead(
+  rtems_boolean find_flag
+)
+{
+  Timer_driver_Find_average_overhead = find_flag;
+}