bsps: Move benchmark timer to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/m32c/m32cbsp/btimer/btimer.c

@@ -0,0 +1,69 @@
+/*
+ *  This file implements a stub benchmark timer that is sufficient to
+ *  satisfy linking the RTEMS Benchmarks.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2001.
+ *  On-Line Applications Research Corporation (OAR).
+ */
+
+#include <bsp.h>
+#include <rtems/btimer.h>
+
+#include <varvects.h>
+
+bool benchmark_timer_find_average_overhead;
+uint32_t benchmark_timer_overhead = 10;
+
+#define TABSR *((uint8_t *)0x340)
+#define TA0MR *((uint8_t *)0x356)
+#define TA0   *((uint16_t *)0x346)
+#define TA0IC *((uint8_t *)0x6c)
+
+static int benchmark_timer_interrupts;
+
+static void __attribute__((interrupt)) timer_ra_interrupt(void);
+
+#define ivec_timer_a0 12
+
+void __attribute__((interrupt))
+timer_ra_interrupt(void)
+{
+  benchmark_timer_interrupts++;
+  TA0IC = 0x05;
+
+}
+
+void benchmark_timer_initialize(void)
+{
+  benchmark_timer_interrupts = 0;
+  _set_var_vect (timer_ra_interrupt, ivec_timer_a0);
+  TA0MR = 0x00;
+  TA0   = 0xffff;
+  TA0IC = 0x05;
+  TABSR = 0x55;
+}
+
+benchmark_timer_t benchmark_timer_read(void)
+{
+  uint32_t count;
+
+  count = 0xFFFF - TA0;
+  count += benchmark_timer_interrupts * 0xFFFFL;
+
+  if (!benchmark_timer_find_average_overhead) {
+    if ( count > benchmark_timer_overhead )
+      count -= benchmark_timer_overhead;
+    else
+      count = 0;
+  }
+  return count;
+}
+
+void benchmark_timer_disable_subtracting_average_overhead(
+  bool find_flag
+)
+{
+  benchmark_timer_find_average_overhead = find_flag;
+}