4 files changed, 209 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/a29k/timer/Makefile.am b/c/src/lib/libcpu/a29k/timer/Makefile.am
new file mode 100644
index 0000000000..457e7fa2a6
--- /dev/null
+++ b/c/src/lib/libcpu/a29k/timer/Makefile.am
@@ -0,0 +1,36 @@
+## 
+## Makefile,v 1.2 1995/05/31 16:56:37 joel Exp
+## 
+## @(#)Makefile        03/26/96     1.2
+
+AUTOMAKE_OPTIONS = foreign 1.4
+
+PGM=$(ARCH)/timer.rel
+
+# NOTE: timerisr is normally an assembly file!!!
+
+C_FILES = timer.c timerisr.c
+C_O_FILES = $(C_FILES:%.c=$(ARCH)/%.o)
+
+S_FILES = gettime.S
+S_O_FILES = $(S_FILES:%.S=$(ARCH)/%.o)
+
+OBJS = $(C_O_FILES) $(S_O_FILES)
+
+include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
+include $(top_srcdir)/../../../../../automake/lib.am
+
+#
+# (OPTIONAL) Add local stuff here using +=
+#
+
+$(PGM): $(SRCS) $(OBJS)
+	$(make-rel)
+
+all-local: $(ARCH) $(OBJS) $(PGM)
+
+.PRECIOUS: $(PGM)
+
+EXTRA_DIST = Makefile gettime.S timer.c timerisr.c
+
+include $(top_srcdir)/../../../../../automake/local.am
diff --git a/c/src/lib/libcpu/a29k/timer/gettime.S b/c/src/lib/libcpu/a29k/timer/gettime.S
new file mode 100644
index 0000000000..cd429a7725
--- /dev/null
+++ b/c/src/lib/libcpu/a29k/timer/gettime.S
@@ -0,0 +1,13 @@
+/* @(#)gettime.S       03/26/96     1.1 */
+
+#include "iregdef.h"
+#include "idtcpu.h"
+#include "idtmon.h"
+
+FRAME(mips_read_timer,sp,0,ra)
+	.set noreorder
+        mfc0 v0,C0_COUNT
+        nop
+        j ra
+	.set reorder
+ENDFRAME(mips_read_timer)
diff --git a/c/src/lib/libcpu/a29k/timer/timer.c b/c/src/lib/libcpu/a29k/timer/timer.c
new file mode 100644
index 0000000000..c5911d1fae
--- /dev/null
+++ b/c/src/lib/libcpu/a29k/timer/timer.c
@@ -0,0 +1,119 @@
+/*  timer.c
+ *
+ *  This file manages the benchmark timer used by the RTEMS Timing Test
+ *  Suite.  Each measured time period is demarcated by calls to
+ *  Timer_initialize() and Read_timer().  Read_timer() usually returns
+ *  the number of microseconds since Timer_initialize() exitted.
+ *
+ *  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.
+ *
+ *  timer.c,v 1.2 1995/05/31 16:56:39 joel Exp
+ */
+
+#ifndef lint
+static char _sccsid[] = "@(#)timer.c 05/07/96     1.4\n";
+#endif
+
+#include <rtems.h>
+#include <bsp.h>
+
+#define CLOCKS_PER_MICROSECOND ( CPU_CLOCK_RATE_MHZ )
+#define TIMER_MAX_VALUE 0xffffffff
+
+extern unsigned32 mips_read_timer( void );
+
+static rtems_boolean Timer_driver_Find_average_overhead;
+static unsigned32 Timer_initial_value = 0;
+
+void Timer_initialize( void )
+{
+/*
+   Timer_initial_value = mips_read_timer();
+ */
+  /*
+   *  Somehow start the timer
+   */
+
+  /* Timer on 4650 is always running */
+}
+
+/*
+ *  The following controls the behavior of Read_timer().
+ *
+ *  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      8  /* It typically takes X.X microseconds */
+                             /* (Y countdowns) to start/stop the timer. */
+                             /* This value is in cycles. */
+#define LEAST_VALID       1  /* Don't trust a clicks value lower than this */
+
+int Read_timer( void )
+{
+  unsigned64 clicks;
+  unsigned32 total;
+
+  /*
+   *  Read the timer and see how many clicks it has been since we started.
+   */
+
+  clicks = mips_read_timer();   /* XXX: read some HW here */
+  if (clicks < Timer_initial_value)
+  {
+      clicks += TIMER_MAX_VALUE;
+  }
+  clicks -= Timer_initial_value;
+
+  /*
+   *  Total is calculated by taking into account the number of timer overflow
+   *  interrupts since the timer was initialized and clicks since the last
+   *  interrupts.
+   */
+#if 0 /* leave total in number of cycles */
+   total = clicks / CLOCKS_PER_MICROSECOND;
+#else
+   total = clicks;
+#endif
+
+  if ( Timer_driver_Find_average_overhead == 1 )
+    return total;          /* in # cycles units */
+  else {
+    if ( total < LEAST_VALID )
+      return 0;            /* below timer resolution */
+  /*
+   *  leave total in cycles
+   */
+      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;
+}
+
diff --git a/c/src/lib/libcpu/a29k/timer/timerisr.c b/c/src/lib/libcpu/a29k/timer/timerisr.c
new file mode 100644
index 0000000000..82c3c80d9f
--- /dev/null
+++ b/c/src/lib/libcpu/a29k/timer/timerisr.c
@@ -0,0 +1,41 @@
+/*  timerisr.s
+ *
+ *  If required this ISR is used to bump a count of interval "overflow"
+ *  interrupts which have occurred since the timer was started.  The
+ *  number of overflows is taken into account in the Read_timer()
+ *  routine if necessary.
+ *
+ *  To reduce overhead this is best to be the "rawest" hardware interupt
+ *  handler you can write.  This should be the only interrupt which can
+ *  occur during the measured time period.
+ *
+ *  NOTE:  This file is USUALLY in assembly and is LEAN AND MEAN.
+ *         Any code in this isr is pure overhead which can perturb
+ *         the accuracy of the Timing Test Suite.
+ *
+ *  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.
+ *
+ *  timerisr.c,v 1.2 1995/05/31 16:56:40 joel Exp
+ */
+
+#ifndef lint
+static char _sccsid[] = "@(#)timerisr.c 03/15/96     1.1\n";
+#endif
+
+#include <rtems.h>
+
+extern rtems_unsigned32 _Timer_interrupts;
+
+void timerisr( void )
+{
+  /*
+   *  _Timer_interrupts += TIMER_BETWEEN_OVERFLOWS  (usually in microseconds)
+   *  return from interrupt
+   */
+}