New file.

c/src/lib/libbsp/shared/clockdrv_shell.c

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+/*
+ *  Clock Tick Device Driver Shell
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found 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>
+
+/*
+ *  Clock ticks since initialization
+ */
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+
+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;
+
+/*
+ *  Clock_isr
+ *
+ *  This is the clock tick interrupt handler.
+ *
+ *  Input parameters:
+ *    vector - vector number
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:      NONE
+ *
+ */
+
+rtems_isr Clock_isr(
+  rtems_vector_number vector
+)
+{
+  /*
+   *  Do the hardware specific per-tick action.
+   */
+
+  Clock_driver_support_at_tick();
+
+  /*
+   *  The driver has seen another tick.
+   */
+
+  Clock_driver_ticks += 1;
+
+  /*
+   *  Real Time Clock counter/timer is set to automatically reload.
+   */
+
+#ifndef CLOCK_DRIVER_ISRS_ARE_ONE_MILLISECOND
+  rtems_clock_tick();
+#else
+#error "Clock driver shell: Does not currently support counting mseconds."
+#endif
+}
+
+/*
+ *  Install_clock
+ *
+ *  This routine actually performs the hardware initialization for the clock.
+ *
+ *  Input parameters:
+ *    clock_isr - clock interrupt service routine entry point
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:      NONE
+ *
+ */
+
+extern int CLOCK_SPEED;
+
+void Install_clock(
+  rtems_isr_entry clock_isr
+)
+{
+  Clock_driver_ticks = 0;
+
+  /*
+   *  Install vector
+   */
+
+  Clock_driver_support_install_isr( clock_isr, Old_ticker );
+
+  /*
+   *  Now initialize the hardware that is the source of the tick ISR.
+   */
+
+  Clock_driver_support_initialize_hardware();
+
+  atexit( Clock_exit );
+}
+
+/*
+ *  Clock_exit
+ *
+ *  This routine allows the clock driver to exit by masking the interrupt and
+ *  disabling the clock's counter.
+ *
+ *  Input parameters:   NONE
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:      NONE
+ *
+ */
+
+void Clock_exit( void )
+{
+  Clock_driver_support_shutdown_hardware();
+
+  /* do not restore old vector */
+}
+ 
+/*
+ *  Clock_initialize
+ *
+ *  This routine initializes the clock driver.
+ *
+ *  Input parameters:
+ *    major - clock device major number
+ *    minor - clock device minor number
+ *    parg  - pointer to optional device driver arguments
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:
+ *    rtems_device_driver status code
+ */
+
+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;
+}
+ 
+/*
+ *  Clock_control
+ *
+ *  This routine is the clock device driver control entry point.
+ *
+ *  Input parameters:
+ *    major - clock device major number
+ *    minor - clock device minor number
+ *    parg  - pointer to optional device driver arguments
+ *
+ *  Output parameters:  NONE
+ *
+ *  Return values:
+ *    rtems_device_driver status code
+ */
+
+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;
+    rtems_isr_entry  ignored_ticker;
+ 
+    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 );
+       Clock_driver_support_install_isr( args->buffer, ignored_ticker );
+      rtems_interrupt_enable( isrlevel );
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}