1 files changed, 62 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/hppa1.1/timer/timer.c b/c/src/lib/libcpu/hppa1.1/timer/timer.c
new file mode 100644
index 0000000000..caa04bd282
--- /dev/null
+++ b/c/src/lib/libcpu/hppa1.1/timer/timer.c
@@ -0,0 +1,62 @@
+/*  timer.c
+ *
+ *  This file manages the interval timer on the PA-RISC.
+ *
+ *  NOTE: It is important that the timer start/stop overhead be
+ *        determined when porting or modifying this code.
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+
+volatile rtems_unsigned32 Timer_starting;
+rtems_boolean Timer_driver_Find_average_overhead;
+
+void Timer_initialize()
+{
+  Timer_starting = get_itimer();
+}
+
+#define AVG_OVERHEAD      0  /* It typically takes 3.0 microseconds */
+                             /* (6 countdowns) to start/stop the timer. */
+#define LEAST_VALID       1  /* Don't trust a value lower than this */
+
+int Read_timer()
+{
+  rtems_unsigned32 clicks;
+  rtems_unsigned32 total;
+
+  clicks = get_itimer();
+
+  total = clicks - Timer_starting;
+
+  if ( Timer_driver_Find_average_overhead == 1 )
+    return total;          /* in XXX microsecond units */
+
+  else {
+    if ( total < LEAST_VALID )
+      return 0;            /* below timer resolution */
+    return (total - AVG_OVERHEAD);
+  }
+}
+
+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;
+}