bsp/tms570: implemented support functions to satisfy complete tests build requirements.

This patch enables to build all RTEMS tests for tms570ls3137_hdk_sdram
BSP variant in in default build. Debug build with --enable-rtems-debug set
has succeed for samples subset of tests as well.

1 files changed, 61 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/arm/tms570/clock/benchmark_timer.c b/c/src/lib/libbsp/arm/tms570/clock/benchmark_timer.c
new file mode 100644
index 0000000000..b45f0f4919
--- /dev/null
+++ b/c/src/lib/libbsp/arm/tms570/clock/benchmark_timer.c
@@ -0,0 +1,61 @@
+/**
+ * @file benchmark_timer.c
+ *
+ * @ingroup tms570
+ *
+ * @brief clock functions definitions.
+ */
+
+/*
+ * Copyright (c) 2014 Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Czech Technical University in Prague
+ * Zikova 1903/4
+ * 166 36 Praha 6
+ * Czech Republic
+ *
+ * Based on LPC24xx and LPC1768 BSP
+ * by embedded brains GmbH and others
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <stdlib.h>
+
+#include <rtems.h>
+#include <bsp.h>
+#include <bsp/system-clocks.h>
+#include <rtems/btimer.h>
+#include <rtems/timerdrv.h>
+
+bool benchmark_timer_find_average_overhead = false;
+
+static uint32_t benchmark_timer_base;
+
+void benchmark_timer_initialize(void)
+{
+  benchmark_timer_base = _CPU_Counter_read();
+}
+
+uint32_t benchmark_timer_read(void)
+{
+  uint32_t delta = _CPU_Counter_read() - benchmark_timer_base;
+
+  if (benchmark_timer_find_average_overhead) {
+    return delta;
+  } else {
+    /* TODO check on hardware */
+    if (delta > 74) {
+      return delta - 74;
+    } else {
+      return 0;
+    }
+  }
+}
+
+void benchmark_timer_disable_subtracting_average_overhead(bool find_average_overhead )
+{
+  benchmark_timer_find_average_overhead = find_average_overhead;
+}