1 files changed, 152 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..41b3a0e18c
--- /dev/null
+++ b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
@@ -0,0 +1,152 @@
+/*  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) 1989-1997.
+ *  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.
+ *
+ *  $Id$
+ */
+
+#include <bsp.h>
+
+#include <rtems/libio.h>
+
+#include <stdlib.h>
+
+#define CLOCK_VECTOR 0x20
+
+rtems_unsigned32 Clock_isrs;              /* ISRs until next tick */
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+
+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_major_number rtems_clock_minor = 0;
+
+/*
+ *  This is the ISR handler.
+ */
+
+rtems_isr Clock_isr(
+  rtems_vector_number vector
+)
+{
+  /* enable_tracing(); */
+  Clock_driver_ticks += 1;
+  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 );
+
+/*  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 ) {
+     /* should do something here */;
+  }
+}
+
+
+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;
+}
+