2002-11-13 Jay Monkman <jtm@smoothsmoothie.com>

	* New BSP.
	* .cvsignore, ChangeLog, Makefile.am, bsp_specs, configure.ac, README,
	times, clock/.cvsignore, clock/Makefile.am, clock/clockdrv.c,
	console/.cvsignore, console/Makefile.am, console/uart.c,
	include/.cvsignore, include/Makefile.am, include/bsp.h,
	include/ep7312.h, irq/.cvsignore, irq/Makefile.am, irq/bsp_irq_asm.S,
	irq/bsp_irq_init.c, irq/irq.c, irq/irq.h, network/Makefile.am,
	network/network.c, start/.cvsignore, start/Makefile.am,
	start/start.S, startup/.cvsignore, startup/Makefile.am,
	startup/bspstart.c, startup/exit.c, startup/linkcmds,
	timer/.cvsignore, timer/Makefile.am, timer/timer.c,
	wrapup/.cvsignore, wrapup/Makefile.am: New file.

3 files changed, 140 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/arm/edb7312/timer/.cvsignore b/c/src/lib/libbsp/arm/edb7312/timer/.cvsignore
new file mode 100644
index 0000000000..d29e5050f5
--- /dev/null
+++ b/c/src/lib/libbsp/arm/edb7312/timer/.cvsignore
@@ -0,0 +1,14 @@
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache
+config.cache
+config.guess
+config.log
+config.status
+config.sub
+configure
+depcomp
+install-sh
+missing
+mkinstalldirs
diff --git a/c/src/lib/libbsp/arm/edb7312/timer/Makefile.am b/c/src/lib/libbsp/arm/edb7312/timer/Makefile.am
new file mode 100644
index 0000000000..56ac482989
--- /dev/null
+++ b/c/src/lib/libbsp/arm/edb7312/timer/Makefile.am
@@ -0,0 +1,33 @@
+##
+## $Id$
+##
+
+VPATH = @srcdir@:@srcdir@/../../../shared
+
+PGM = $(ARCH)/timer.rel
+
+C_FILES = timer.c
+C_O_FILES = $(C_FILES:%.c=$(ARCH)/%.o)
+
+OBJS = $(C_O_FILES)
+
+include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
+include $(top_srcdir)/../../../../../../automake/compile.am
+include $(top_srcdir)/../../../../../../automake/lib.am
+
+#
+# (OPTIONAL) Add local stuff here using +=
+#
+
+$(PGM): $(OBJS)
+	$(make-rel)
+
+# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile
+
+all-local: $(ARCH) $(OBJS) $(PGM)
+
+.PRECIOUS: $(PGM)
+
+EXTRA_DIST = timer.c
+
+include $(top_srcdir)/../../../../../../automake/local.am
diff --git a/c/src/lib/libbsp/arm/edb7312/timer/timer.c b/c/src/lib/libbsp/arm/edb7312/timer/timer.c
new file mode 100644
index 0000000000..954a35f86c
--- /dev/null
+++ b/c/src/lib/libbsp/arm/edb7312/timer/timer.c
@@ -0,0 +1,93 @@
+/*
+ * Cirrus EP7312 Timer driver
+ *
+ * Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
+ *	
+ *  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.
+ *
+ * Notes:
+ *  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.
+ *
+ *  It is important that the timer start/stop overhead be determined 
+ *  when porting or modifying this code.
+ *
+ *  $Id$
+*/
+
+#include <rtems.h>
+#include <bsp.h>
+#include <ep7312.h>
+
+rtems_unsigned16 tstart;
+rtems_boolean Timer_driver_Find_average_overhead;
+
+void Timer_initialize( void )
+{
+    *EP7312_SYSCON1 |= EP7312_SYSCON1_TC2_512KHZ;
+    *EP7312_TC2D = 0xffff;
+}
+
+/*
+ *  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      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 */
+
+int Read_timer( void )
+{
+  rtems_unsigned16 t;
+  rtems_unsigned32 total;
+  t = *EP7312_TC2D;
+
+  /*
+   *  Total is calculated by taking into account the number of timer overflow
+   *  interrupts since the timer was initialized and clicks since the last
+   *  interrupts.
+   */
+
+  total = (unsigned32)0x0000ffff - t;  /* result is 1/512000 = ~2 uS */
+  total = (total * 1953) / 1000;   /* convert to uS */
+  if ( Timer_driver_Find_average_overhead == 1 )
+    return total;          /* in XXX microsecond units */
+  else {
+    if ( total < LEAST_VALID )
+      return 0;            /* below timer resolution */
+  /*
+   *  Somehow convert total into microseconds
+   */
+      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;
+}
+