Rename or1ksim BSP to generic_or1k

or1ksim BSP was initially named after or1ksim simulator, and it was
intented to only run there. But now it can also run on QEMU, jor1k and
real FPGA boards without modifications. It makes more sense to give
it a new generic name like generic_or1k.

1 files changed, 64 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c b/c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c
new file mode 100644
index 0000000000..872f1af7be
--- /dev/null
+++ b/c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c
@@ -0,0 +1,64 @@
+/**
+ * @file
+ *
+ * @ingroup generic_or1k
+ *
+ * @brief Benchmark timer support.
+ */
+
+/*
+ * Copyright (c) 2014-2015 by Hesham ALMatary
+ *
+ *  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 <rtems/btimer.h>
+#include <bsp/generic_or1k.h>
+#include <rtems/score/or1k-utility.h>
+
+#define OR1K_NANOSECONDS_PER_CLK_CYCLE 10
+
+static bool benchmark_timer_find_average_overhead = false;
+static uint64_t benchmark_timer_base;
+
+void benchmark_timer_initialize(void)
+{
+  benchmark_timer_base = _OR1K_mfspr(CPU_OR1K_SPR_TTCR);
+}
+
+#define AVG_OVERHEAD  0
+#define LEAST_VALID   1
+
+benchmark_timer_t benchmark_timer_read( void )
+{
+  uint64_t         clicks;
+  uint64_t         total;
+  uint64_t         delta;
+  /*
+   *  Read the timer and see how many clicks (clock cycles)
+   *  has passed since timer initialization.
+   */
+  clicks = _OR1K_mfspr(CPU_OR1K_SPR_TTCR);
+
+  delta = clicks - benchmark_timer_base;
+
+  /* total in nanoseconds */
+  total = OR1K_NANOSECONDS_PER_CLK_CYCLE * (delta);
+
+  if ( benchmark_timer_find_average_overhead == true )
+    return total;          /* in nanoseconds microsecond units */
+  else {
+    if ( total < LEAST_VALID )
+      return 0;            /* below timer resolution */
+
+      return (total - AVG_OVERHEAD);
+  }
+}
+
+void benchmark_timer_disable_subtracting_average_overhead(bool find_flag)
+{
+  benchmark_timer_find_average_overhead = find_flag;
+}