1 files changed, 173 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme136/clock/ckinit.c b/c/src/lib/libbsp/m68k/mvme136/clock/ckinit.c
new file mode 100644
index 0000000000..214d80190f
--- /dev/null
+++ b/c/src/lib/libbsp/m68k/mvme136/clock/ckinit.c
@@ -0,0 +1,173 @@
+/*  Clock_init()
+ *
+ *  This routine initializes the Z80386 1 on the MVME136 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 <stdlib.h>
+
+#include <bsp.h>
+#include <rtems/libio.h>
+#include <z8036.h>
+
+#define MICRVAL     0xe2            /* disable lower chain, no vec */
+                                    /*  set right justified addr */
+                                    /*  and master int enable */
+#define MCCRVAL     0xc4            /* enable T1 and port B */
+                                    /*   timers independent */
+#define MS_COUNT    0x07d0          /* T1's countdown constant (1 ms) */
+#define T1MSRVAL    0x80            /* T1 cont. cycle/pulse output */
+#define T1CSRVAL    0xc6            /* enable interrupt, allow and */
+                                    /*   and trigger countdown */
+
+#define TIMER        0xfffb0000
+#define RELOAD       0x24            /* clr IP & IUS,allow countdown */
+ 
+#define CLOCK_VECTOR 66
+
+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;
+ 
+/*
+ *  ISR Handler
+ */
+ 
+rtems_isr Clock_isr(
+  rtems_vector_number vector
+)
+{
+  Clock_driver_ticks += 1;
+  ((volatile struct z8036_map *) TIMER)->CT1_CMD_STATUS = RELOAD;
+
+  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
+)
+{
+  volatile struct z8036_map *timer;
+
+  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 );
+    timer = (struct z8036_map *) 0xfffb0000;
+    timer->MASTER_INTR        = MICRVAL;
+    timer->CT1_MODE_SPEC      = T1MSRVAL;
+
+    *((rtems_unsigned16 *)0xfffb0016) = MS_COUNT;  /* write countdown value */
+
+    /*
+     *  timer->CT1_TIME_CONST_MSB = (MS_COUNT >> 8);
+     *  timer->CT1_TIME_CONST_LSB = (MS_COUNT &  0xff);
+     */
+
+    timer->MASTER_CFG         = MCCRVAL;
+    timer->CT1_CMD_STATUS     = T1CSRVAL;
+
+    /*
+     * Enable interrupt via VME interrupt mask register
+     */
+    (*(rtems_unsigned8 *)0xfffb0038) &= 0xfd;
+
+    atexit( Clock_exit );
+  }
+
+}
+
+void Clock_exit( void )
+{
+  volatile struct z8036_map *timer;
+
+  if ( BSP_Configuration.ticks_per_timeslice ) {
+    timer = (struct z8036_map *) 0xfffb0000;
+    timer->MASTER_INTR        = 0x62;
+    timer->CT1_MODE_SPEC      = 0x00;
+    timer->MASTER_CFG         = 0xf4;
+    timer->CT1_CMD_STATUS     = 0x00;
+    /* 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;
+}