1 files changed, 75 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/force386/clock/ckinit.c b/c/src/lib/libbsp/i386/force386/clock/ckinit.c
new file mode 100644
index 0000000000..45400dbd49
--- /dev/null
+++ b/c/src/lib/libbsp/i386/force386/clock/ckinit.c
@@ -0,0 +1,75 @@
+/*  Clock_initialize
+ *
+ *  This routine initializes the Motorola MFP 68901 on the
+ *  FORCE CPU386 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.
+ *
+ *  $Id$
+ */
+
+#include <bsp.h>
+#include <clockdrv.h>
+#include <stdlib.h>
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+rtems_unsigned32 Clock_isrs;              /* ISRs until next tick */
+rtems_isr_entry  Old_ticker;
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp,
+  rtems_id tid,
+  rtems_unsigned32 *rval
+)
+{
+  Install_clock( Clock_isr );
+}
+
+void ReInstall_clock(
+  rtems_isr_entry clock_isr
+)
+{
+  rtems_unsigned32 isrlevel = 0;
+
+  rtems_interrupt_disable( isrlevel );
+   (void) set_vector( clock_isr, 0x38, 1 );
+  rtems_interrupt_enable( isrlevel );
+}
+
+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, 0x38, 1 );
+    outport_byte( TBCR, 0x14 );  /* reset it, delay mode, 50X */
+    outport_byte( TBDR, 0x50 );  /* 1 millisecond */
+    outport_byte( IERA, 0x41 );  /* enable interrupt for B */
+  }
+  atexit( Clock_exit );
+}
+
+void Clock_exit( void )
+{
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    outport_byte( TBCR, 0x00 );  /* initial value */
+    outport_byte( IERA, 0x40 );  /* disable interrupt */
+    /* ??? Is "do not restore old vector" causing problems? */
+  }
+}
+