1 files changed, 93 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
new file mode 100644
index 0000000000..1d43059ac2
--- /dev/null
+++ b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
@@ -0,0 +1,93 @@
+/*  Clock_initialize
+ *
+ *  This routine initializes the Timer/Counter on the Intel
+ *  386ex evaluation 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, 0x20, 1 ); /* was 0x38 */
+  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, 0x20, 1 ); 
+                                                     /* was 0x38 */
+
+/*  The following is already set up in interns.s -> 
+    ( This is test code only... production code will move the 
+      TMRCFG stuff here )
+*/
+#define TMR0	  0xF040
+#define TMR1	  0xF041
+#define TMR2	  0xF042
+#define TMRCON	  0xF043
+#define TMRCFG    0xF834
+	
+	outport_byte	( TMRCFG , 0x80 );
+
+	outport_byte    ( TMRCON , 0x34 ); 
+	outport_byte	( TMR0   , 0xA8 ); 
+	outport_byte    ( TMR0   , 0x04 ); 
+
+	outport_byte    ( TMRCFG , 0x00 ); 
+  }
+  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? */
+  }
+}
+