From ac7d5ef06a6d6e8d84abbd1f0b82162725f98326 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Thu, 11 May 1995 17:39:37 +0000
Subject: Initial revision

---
 c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c | 91 ++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c

(limited to 'c/src/lib/libbsp/m68k/mvme162/clock')

diff --git a/c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c b/c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c
new file mode 100644
index 0000000000..95e35e5f66
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/mvme162/clock/ckinit.c
@@ -0,0 +1,91 @@
+/*  Clock_init()
+ *
+ *  This routine initializes the Tick Timer 2 on the MVME162 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.
+ *
+ *  Modifications of respective RTEMS file: COPYRIGHT (c) 1994.
+ *  EISCAT Scientific Association. M.Savitski
+ *
+ *  This material is a part of the MVME162 Board Support Package
+ *  for the RTEMS executive. Its licensing policies are those of the
+ *  RTEMS above.
+ *
+ *  $Id$
+ */
+
+#include <stdlib.h>
+
+#include <rtems.h>
+#include <bsp.h>
+#include <clockdrv.h>
+
+#define MS_COUNT          1000            /* T2's countdown constant (1 ms) */
+#define CLOCK_INT_LEVEL   6                         /* T2's interrupt level */
+
+rtems_unsigned32 Clock_isrs;        /* ISRs until next tick */
+volatile rtems_unsigned32 Clock_driver_ticks;
+                                    /* ticks since initialization */
+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( clock_isr )
+rtems_isr_entry clock_isr;
+{
+  rtems_unsigned32 isrlevel;
+
+  rtems_interrupt_disable( isrlevel );
+  (void) set_vector( clock_isr, (VECTOR_BASE >> 28) * 0x10 + 0x9, 1 );
+  rtems_interrupt_enable( isrlevel );
+}
+
+void Install_clock( clock_isr )
+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, (VECTOR_BASE >> 28) * 0x10 + 0x9, 1 );
+
+    lcsr->vector_base = 0x67800000;              /* set vb, enable interrupts */
+    lcsr->to_ctl = 0xE7;              /* prescaler to 1 MHz (see Appendix A1) */
+    lcsr->timer_cmp_2 = MS_COUNT;
+    lcsr->timer_cnt_2 = 0;                                   /* clear counter */
+    lcsr->board_ctl |= 0x700;  /* increment, reset-on-compare, clear-ovfl-cnt */
+
+    lcsr->intr_level[0] |= CLOCK_INT_LEVEL * 0x10;           /* set int level */
+    lcsr->intr_ena |= 0x02000000;            /* enable tick timer 2 interrupt */
+
+    atexit( Clock_exit );
+  }
+
+}
+
+void Clock_exit( void )
+{
+/* Dummy for now. See other m68k BSP's for code examples */
+}
-- 
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