New files -- from rtems-LM-980406 which was based on an RTEMS from 12/97.

This was called the dmv170 BSP in that source tree but since the DMV171
is now obsolete, we have transitioned to the DMV177 and have no intention
of checking compatibility with any other models.

2 files changed, 213 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/dmv177/timer/Makefile.in b/c/src/lib/libbsp/powerpc/dmv177/timer/Makefile.in
new file mode 100644
index 0000000000..35a903e737
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/dmv177/timer/Makefile.in
@@ -0,0 +1,61 @@
+#
+#  $Id$
+#
+
+@SET_MAKE@
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+VPATH = @srcdir@
+RTEMS_ROOT = @RTEMS_ROOT@
+PROJECT_ROOT = @PROJECT_ROOT@
+RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
+
+PGM=${ARCH}/timer.rel
+
+# C source names, if any, go here -- minus the .c
+C_PIECES=timer
+C_FILES=$(C_PIECES:%=%.c)
+C_O_FILES=$(C_PIECES:%=${ARCH}/%.o)
+
+H_FILES=
+
+# Assembly source names, if any, go here -- minus the .s
+S_PIECES=
+S_FILES=$(S_PIECES:%=%.s)
+S_O_FILES=$(S_FILES:%.s=${ARCH}/%.o)
+
+SRCS=$(C_FILES) $(CC_FILES) $(H_FILES) $(S_FILES)
+OBJS=$(C_O_FILES) $(CC_O_FILES) $(S_O_FILES)
+
+include $(RTEMS_CUSTOM)
+include $(PROJECT_ROOT)/make/leaf.cfg
+
+#
+# (OPTIONAL) Add local stuff here using +=
+#
+
+DEFINES  +=
+CPPFLAGS +=
+CFLAGS   +=
+
+LD_PATHS  +=
+LD_LIBS   +=
+LDFLAGS   +=
+
+#
+# Add your list of files to delete here.  The config files
+#  already know how to delete some stuff, so you may want
+#  to just run 'make clean' first to see what gets missed.
+#  'make clobber' already includes 'make clean'
+#
+
+CLEAN_ADDITIONS +=
+CLOBBER_ADDITIONS +=
+
+${PGM}: ${SRCS} ${OBJS}
+	$(make-rel)
+
+all:	${ARCH} $(SRCS) $(PGM)
+
+# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile
+install:  all
diff --git a/c/src/lib/libbsp/powerpc/dmv177/timer/timer.c b/c/src/lib/libbsp/powerpc/dmv177/timer/timer.c
new file mode 100644
index 0000000000..72d1bb79a3
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/dmv177/timer/timer.c
@@ -0,0 +1,152 @@
+/*  timer.c
+ *
+ *  This file implements a benchmark timer using the General Purpose Timer on
+ *  the MEC.
+ *
+ *  The license and distribution terms for this file are in
+ *  the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <assert.h>
+
+#include <bsp.h>
+
+rtems_unsigned64 Timer_driver_Start_time;
+
+rtems_boolean Timer_driver_Find_average_overhead;
+
+static inline rtems_unsigned64 PPC_Get_timebase_register( void )
+{
+  rtems_unsigned32 tbr_low;
+  rtems_unsigned32 tbr_high;
+  rtems_unsigned32 tbr_high_old;
+  rtems_unsigned64 tbr;
+
+  do {
+    asm volatile( "mftbu %0" : "=r" (tbr_high_old));
+    asm volatile( "mftb  %0" : "=r" (tbr_low));
+    asm volatile( "mftbu %0" : "=r" (tbr_high));
+  } while ( tbr_high_old != tbr_high );
+
+  tbr = tbr_high;
+  tbr <<= 32;
+  tbr |= tbr_low;
+  return tbr;
+}
+
+/*  PAGE
+ *
+ *  Timer_initialize
+ *  
+ *  This routine initializes the timer.  
+ *
+ *  Input parameters:   NONE
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:      NONE
+ *
+ */
+
+void Timer_initialize()
+{
+  /*
+   *  Timer runs long and accurate enough not to require an interrupt.
+   */
+
+
+  Timer_driver_Start_time = PPC_Get_timebase_register();
+  
+
+}
+
+#define AVG_OVERHEAD     24  /* It typically takes 24 instructions */
+                             /*     to start/stop the timer. */
+#define LEAST_VALID       1  /* Don't trust a value lower than this */
+                             /* psim can count instructions. :) */
+
+/*  PAGE
+ *
+ *  Read_timer
+ *
+ *  This routine reads the timer.
+ *
+ *  Input parameters:   NONE
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:      timer in ms units
+ *
+ */
+
+int Read_timer()
+{
+  rtems_unsigned64  clicks;
+  rtems_unsigned64  total64;
+  rtems_unsigned32  total;
+
+  /* approximately CLOCK_SPEED clicks per microsecond */
+
+  clicks = PPC_Get_timebase_register();
+
+  assert( clicks > Timer_driver_Start_time );
+
+  total64 = clicks - Timer_driver_Start_time;
+
+  assert( total64 <= 0xffffffff );  /* fits into a unsigned32 */
+
+  total = (rtems_unsigned32) total64;
+
+  if ( Timer_driver_Find_average_overhead == 1 )
+    return total;          /* in one microsecond units */
+
+  if ( total < LEAST_VALID )
+    return 0;            /* below timer resolution */
+
+  return total - AVG_OVERHEAD;
+}
+
+/*  PAGE
+ *
+ *  Empty_function
+ *
+ *  This routine is called during the idle loop.
+ *
+ *  Input parameters:   NONE
+ *
+ *  Output parameters:  
+ *    status code of successful
+ *
+ *  Return values:      NONE
+ *
+ */
+
+rtems_status_code Empty_function( void )
+{
+  return RTEMS_SUCCESSFUL;
+}
+
+/*  PAGE
+ *
+ *  Set_find_average_overhead
+ *
+ *  This routine sets a global boolean to the value passed in.
+ *
+ *  Input parameters: 
+ *    find_flag  - flag to indicate to find the average overhead.
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:      NONE
+ *
+ */
+
+void Set_find_average_overhead(
+  rtems_boolean find_flag
+)
+{
+  Timer_driver_Find_average_overhead = find_flag;
+}