1 files changed, 146 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c b/c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c
new file mode 100644
index 0000000000..6490737731
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c
@@ -0,0 +1,146 @@
+/*  Clock_init()
+ *
+ *  This routine initializes the Tick Timer 2 on the MVME162 board.
+ *  The tick frequency is 1 millisecond.
+ *
+ *  Input parameters:  NONE
+ *
+ *  Output parameters:  NONE
+ *
+ *  COPYRIGHT (c) 1989-1997.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may in
+ *  the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  Modifications of respective RTEMS file: COPYRIGHT (c) 1994.
+ *  EISCAT Scientific Association. M.Savitski
+ *
+ *  This material is a part of the MVME162 Board Support Package
+ *  for the RTEMS executive. Its licensing policies are those of the
+ *  RTEMS above.
+ *
+ *  $Id$
+ */
+
+#include <stdlib.h>
+
+#include <bsp.h>
+#include <rtems/libio.h>
+
+#define MS_COUNT          1000            /* T2's countdown constant (1 ms) */
+#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 );
+ 
+#define CLOCK_VECTOR (VBR0 * 0x10 + 0x9)
+/*
+ * 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;
+  lcsr->timer_cnt_2 = 0;            /* clear counter */
+  lcsr->intr_clear |= 0x02000000;
+
+  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, CLOCK_VECTOR, 1 );
+    lcsr->vector_base |= MASK_INT;   /* unmask VMEchip2 interrupts */
+    lcsr->to_ctl = 0xE7;             /* prescaler to 1 MHz (see Appendix A1) */
+    lcsr->timer_cmp_2 = MS_COUNT;
+    lcsr->timer_cnt_2 = 0;           /* clear counter */
+    lcsr->board_ctl |= 0x700;        /* increment, reset-on-compare, and */
+                                     /*   clear-overflow-cnt */
+
+    lcsr->intr_level[0] |= CLOCK_INT_LEVEL * 0x10;      /* set int level */
+    lcsr->intr_ena |= 0x02000000;       /* enable tick timer 2 interrupt */
+
+    atexit( Clock_exit );
+  } 
+}
+
+void Clock_exit( void )
+{
+/* Dummy for now. See other m68k BSP's for code examples */
+}
+
+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(CLOCK_VECTOR);
+    }
+    else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
+    {
+      rtems_interrupt_disable( isrlevel );
+       (void) set_vector( args->buffer, CLOCK_VECTOR, 1 );
+      rtems_interrupt_enable( isrlevel );
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}
+