1 files changed, 82 insertions, 0 deletions
diff --git a/bsps/m68k/mvme147/clock/ckinit.c b/bsps/m68k/mvme147/clock/ckinit.c
new file mode 100644
index 0000000000..ce88255593
--- /dev/null
+++ b/bsps/m68k/mvme147/clock/ckinit.c
@@ -0,0 +1,82 @@
+/*
+ *  This routine initializes the Tick Timer 2 on the MVME147 board.
+ *  The tick frequency is 1 millisecond.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  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.
+ *
+ *  MVME147 port for TNI - Telecom Bretagne
+ *  by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
+ *  May 1996
+ */
+
+#include <stdlib.h>
+
+#include <bsp.h>
+#include <rtems/clockdrv.h>
+
+#define MS_COUNT          65376    /* 1ms */
+/* MS_COUNT = 0x10000 - 1e-3/6.25e-6 */
+#define CLOCK_INT_LEVEL   6               /* T2's interrupt level */
+
+uint32_t         Clock_isrs;                  /* ISRs until next tick */
+volatile uint32_t         Clock_driver_ticks; /* ticks since initialization */
+rtems_isr_entry  Old_ticker;
+
+void Clock_exit( void );
+
+/*
+ *  ISR Handler
+ */
+static rtems_isr Clock_isr(rtems_vector_number vector)
+{
+  Clock_driver_ticks += 1;
+  pcc->timer2_int_control |= 0x80; /* Acknowledge interr. */
+
+  if (Clock_isrs == 1) {
+    rtems_clock_tick();
+    Clock_isrs = rtems_configuration_get_microseconds_per_tick() / 1000;
+  }
+  else
+    Clock_isrs -= 1;
+}
+
+static void Install_clock(rtems_isr_entry clock_isr )
+{
+
+  Clock_driver_ticks = 0;
+  Clock_isrs = rtems_configuration_get_microseconds_per_tick() / 1000;
+
+  Old_ticker = (rtems_isr_entry) set_vector( clock_isr, TIMER_2_VECTOR, 1 );
+
+  pcc->timer2_int_control = 0x00; /* Disable T2 Interr. */
+  pcc->timer2_preload = MS_COUNT;
+  /* write preload value */
+  pcc->timer2_control = 0x07; /* clear T2 overflow counter, enable counter */
+  pcc->timer2_int_control = CLOCK_INT_LEVEL|0x08;
+  /* Enable Timer 2 and set its int. level */
+
+  atexit( Clock_exit );
+}
+
+void Clock_exit( void )
+{
+  pcc->timer2_int_control = 0x00; /* Disable T2 Interr. */
+}
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  Install_clock( Clock_isr );
+
+  return RTEMS_SUCCESSFUL;
+}