bsp/lpc24xx: Move source files to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/arm/lpc24xx/start/timer.c

@@ -0,0 +1,56 @@
+/**
+ * @file
+ *
+ * @ingroup lpc24xx
+ *
+ * @brief Benchmark timer support.
+ */
+
+/*
+ * Copyright (c) 2008, 2009
+ * embedded brains GmbH
+ * Obere Lagerstr. 30
+ * D-82178 Puchheim
+ * Germany
+ * <rtems@embedded-brains.de>
+ *
+ * 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 <rtems.h>
+#include <bsp.h>
+#include <rtems/btimer.h>
+
+#include <bsp/system-clocks.h>
+
+bool benchmark_timer_find_average_overhead = false;
+
+static uint32_t benchmark_timer_base;
+
+void benchmark_timer_initialize(void)
+{
+  benchmark_timer_base = lpc24xx_timer();
+}
+
+benchmark_timer_t benchmark_timer_read(void)
+{
+  uint32_t delta = lpc24xx_timer() - benchmark_timer_base;
+
+  if (benchmark_timer_find_average_overhead) {
+    return delta;
+  } else {
+    /* Value determined by tmck for NCS board */
+    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;
+}