1 files changed, 141 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i960/cvme961/clock/ckinit.c b/c/src/lib/libbsp/i960/cvme961/clock/ckinit.c
new file mode 100644
index 0000000000..22a4d43b89
--- /dev/null
+++ b/c/src/lib/libbsp/i960/cvme961/clock/ckinit.c
@@ -0,0 +1,141 @@
+/*  Clock_init()
+ *
+ *  This routine initializes the timer on the VIC chip on the CVME961.
+ *  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 <stdlib.h>
+
+#include <bsp.h>
+#include <rtems/libio.h>
+
+#define CLOCK_VECTOR 5
+
+rtems_unsigned32 Clock_isrs;              /* ISRs until next tick */
+i960_isr_entry   Old_ticker;
+volatile rtems_unsigned32 Clock_driver_ticks;
+                                          /* ticks since initialization */
+
+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;
+
+
+/* this is later in the file to avoid it being inlined */
+rtems_isr Clock_isr( rtems_vector_number vector );
+
+void Install_clock(
+  rtems_isr_entry clock_isr
+)
+{
+  volatile unsigned char *victimer;
+
+  Clock_driver_ticks = 0;
+  Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
+
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    Old_ticker = set_vector( clock_isr, CLOCK_VECTOR, 1 );
+    victimer = (volatile unsigned char *) 0xa00000c3;
+    *victimer = 0x12;
+    *victimer = 0x92;      /* 1000 HZ */
+  }
+}
+
+void Clock_exit()
+{
+  unsigned char *victimer;
+
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    victimer = (unsigned char *) 0xa00000c3;
+    *victimer = 0x12;
+    i960_mask_intr( 5 );
+    /* do not restore old vector */
+  }
+}
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  Install_clock( Clock_isr );
+ 
+  atexit( Clock_exit );
+
+  /*
+   * 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;
+}
+
+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;
+  i960_clear_intr( 5 );
+}
+