1 files changed, 162 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/ods68302/clock/ckinit.c b/c/src/lib/libbsp/m68k/ods68302/clock/ckinit.c
new file mode 100644
index 0000000000..f5745821f4
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/ods68302/clock/ckinit.c
@@ -0,0 +1,162 @@
+/*  Clock_init()
+ *
+ *  This routine initializes Timer 1 for an MC68302.
+ *  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>			/* for atexit() */
+
+#include <bsp.h>
+#include <rtems/libio.h>
+
+#include "m68302.h"
+
+#define CLOCK_VECTOR 137
+
+#define TMR1_VAL (  RBIT_TMR_RST	/* software reset the timer */\
+		  | RBIT_TMR_ICLK_MASTER16 /* master clock divided by 16 */\
+		  | RBIT_TMR_FRR	/* restart timer after ref reached */\
+		  | RBIT_TMR_ORI)	/* enable interrupt when ref reached */
+#define TRR1_VAL 1000			/* 1000 ticks @ 16MHz/16
+					 *    = 1 millisecond tick.
+					 */
+
+/*
+ *  Clock_driver_ticks is a monotonically increasing counter of the
+ *  number of clock ticks since the driver was initialized.
+ */
+volatile rtems_unsigned32 Clock_driver_ticks;
+
+/*
+ *  Clock_isrs is the number of clock ISRs until the next invocation of
+ *  the RTEMS clock tick routine.  The clock tick device driver
+ *  gets an interrupt once a millisecond and counts down until the
+ *  length of time between the user configured microseconds per tick
+ *  has passed.
+ */
+rtems_unsigned32 Clock_isrs;
+
+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;
+
+/*
+ *  ISR Handler
+ */
+
+rtems_isr Clock_isr(
+  rtems_vector_number vector
+)
+{
+  Clock_driver_ticks += 1;
+
+  m302.reg.isr  = RBIT_ISR_TIMER1;	/* clear in-service bit */
+  m302.reg.ter1 = (RBIT_TER_REF | RBIT_TER_CAP); /* clear timer intr request */
+
+  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 ) {
+   set_vector( clock_isr, CLOCK_VECTOR, 1 );
+
+    m302.reg.trr1 = TRR1_VAL;		/* set timer reference register */
+    m302.reg.tmr1 = TMR1_VAL;		/* set timer mode register & enable */
+    /*
+     * Enable TIMER1 interrupts only.
+     */
+    m302.reg.imr  = RBIT_IMR_TIMER1;	/* set 68302 int-mask to allow ints */
+
+    atexit( Clock_exit );
+  }
+}
+
+void Clock_exit( void )
+{
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    /* TODO: figure out what to do here */
+    /* 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 );
+ 
+  /*
+   * 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;
+}
+