1 files changed, 142 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme147/clock/ckinit.c b/c/src/lib/libbsp/m68k/mvme147/clock/ckinit.c
new file mode 100644
index 0000000000..d7fd5ddff2
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/mvme147/clock/ckinit.c
@@ -0,0 +1,142 @@
+/*  Clock_init()
+ *
+ *  This routine initializes the Tick Timer 2 on the MVME147 board.
+ *  The tick frequency is 1 millisecond.
+ *
+ *  Input parameters:  NONE
+ *
+ *  Output parameters:  NONE
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  MVME147 port for TNI - Telecom Bretagne
+ *  by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
+ *  May 1996
+ *
+ *  $Id$
+ */
+
+#include <stdlib.h>
+
+#include <bsp.h>
+#include <rtems/libio.h>
+
+#define MS_COUNT          65376    /* 1ms */
+/* MS_COUNT = 0x10000 - 1e-3/6.25e-6 */
+#define CLOCK_INT_LEVEL   6               /* T2's interrupt level */
+
+rtems_unsigned32 Clock_isrs;                  /* ISRs until next tick */
+volatile rtems_unsigned32 Clock_driver_ticks; /* ticks since initialization */
+rtems_isr_entry  Old_ticker;
+
+void Clock_exit( void );
+ 
+/*
+ * These are set by clock driver during its init
+ */
+ 
+rtems_device_major_number rtems_clock_major = ~0;
+rtems_device_minor_number rtems_clock_minor;
+ 
+
+/*
+ *  ISR Handler
+ */
+
+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 = BSP_Configuration.microseconds_per_tick / 1000;
+  }
+  else 
+    Clock_isrs -= 1;
+}
+
+void Install_clock(rtems_isr_entry clock_isr )
+{
+
+  Clock_driver_ticks = 0;
+  Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
+
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    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 )
+{
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    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 );
+ 
+  /*
+   * make major/minor avail to others such as shared memory driver
+   */
+ 
+  rtems_clock_major = major;
+  rtems_clock_minor = minor;
+ 
+  return RTEMS_SUCCESSFUL;
+}
+ 
+rtems_device_driver Clock_control(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+    rtems_unsigned32 isrlevel;
+    rtems_libio_ioctl_args_t *args = pargp;
+ 
+    if (args == 0)
+        goto done;
+ 
+    /*
+     * This is hokey, but until we get a defined interface
+     * to do this, it will just be this simple...
+     */
+ 
+    if (args->command == rtems_build_name('I', 'S', 'R', ' '))
+    {
+        Clock_isr(TIMER_2_VECTOR);
+    }
+    else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
+    {
+      rtems_interrupt_disable( isrlevel );
+       (void) set_vector( args->buffer, TIMER_2_VECTOR, 1 );
+      rtems_interrupt_enable( isrlevel );
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}
+