1 files changed, 165 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/efi68k/clock/ckinit.c b/c/src/lib/libbsp/m68k/efi68k/clock/ckinit.c
new file mode 100644
index 0000000000..c90eba1e22
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/efi68k/clock/ckinit.c
@@ -0,0 +1,165 @@
+/*  Clock_init()
+ *
+ *  This routine initializes the DP8570A periodic interrupt on the 
+ *  efi68k 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 <stdlib.h>
+#include <bsp.h>
+#include <rtems/libio.h>
+
+#define CLOCK_VECTOR  (TCP_ISR_LEVEL+24)
+
+rtems_unsigned32 Clock_isrs;        /* ISRs until next tick */
+volatile rtems_unsigned32 Clock_driver_ticks;
+                                    /* ticks since initialization */
+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_minor_number rtems_clock_minor;
+
+
+void per_interrupt(void)
+{
+  Clock_driver_ticks += 1;
+
+  *MSR = PER;
+
+  if ( Clock_isrs == 1 ) {
+    rtems_clock_tick();
+    Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
+  }
+  else
+    Clock_isrs -= 1;
+}
+
+rtems_isr Clock_isr(
+  rtems_vector_number vector
+)
+{
+  unsigned char entry_msr, msr;
+
+  entry_msr = *MSR;
+  *MSR = 0;
+  while ( (msr=*MSR) & INT )
+    /* test enabled interrupt bits */
+    if (msr & PER)
+      per_interrupt();
+    else if (msr & T0) {
+      *MSR = T0;		/* reset interrupt */
+      Timer_interrupts++;	/* inc wrap around counter */
+    }
+    else      
+      /* there has been an error if we reach this point */
+      /* default action: reset all the interrupts */
+      *MSR = ( PER | AL | T0 | T1 );
+  *MSR = entry_msr & (RS | PS);
+}
+
+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 );
+
+    *MSR = RS;			/* enable 1mS interrupts */
+    *ICR0 |= OME;
+
+    atexit( Clock_exit );
+  }
+}
+
+void ReInstall_clock(
+  rtems_isr_entry clock_isr
+)
+{
+  rtems_unsigned32 isrlevel = 0 ;
+
+  rtems_interrupt_disable( isrlevel );
+   (void) set_vector( clock_isr, CLOCK_VECTOR, 1 );
+  rtems_interrupt_enable( isrlevel );
+}
+
+void Clock_exit( void )
+{
+
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+
+    /* shutdown periodic interrupt */
+    *MSR = RS;
+    *ICR0 &= 0xc0;
+    /* 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_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', ' '))
+    {
+        ReInstall_clock(args->buffer);
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}