1 files changed, 112 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/unix/posix/clock/clock.c b/c/src/lib/libbsp/unix/posix/clock/clock.c
new file mode 100644
index 0000000000..d3586328ab
--- /dev/null
+++ b/c/src/lib/libbsp/unix/posix/clock/clock.c
@@ -0,0 +1,112 @@
+/*  Clock
+ *
+ *  This routine generates clock ticks using standard POSIX services.
+ *  The tick frequency is specified by the bsp.
+ *
+ *  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 <bsp.h>
+#include <rtems/libio.h>
+#include <stdlib.h>
+
+void Clock_exit(void);
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+
+rtems_unsigned32 Clock_driver_vector;
+
+/*
+ * 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 Install_clock(rtems_isr_entry clock_isr)
+{
+    Clock_driver_ticks = 0;
+
+    (void) set_vector( clock_isr, Clock_driver_vector, 1 );
+
+    _CPU_Start_clock( BSP_Configuration.microseconds_per_tick );
+
+    atexit(Clock_exit);
+}
+
+void Clock_isr(int vector)
+{
+    Clock_driver_ticks++;
+    rtems_clock_tick();
+}
+
+/*
+ * Called via atexit()
+ * Remove the clock signal
+ */
+
+void Clock_exit(void)
+{
+  _CPU_Stop_clock();
+
+  (void) set_vector( 0, Clock_driver_vector, 1 );
+}
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+    Clock_driver_vector = _CPU_Get_clock_vector();
+
+    Install_clock((rtems_isr_entry) 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_driver_vector);
+    }
+    else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
+    {
+      rtems_interrupt_disable( isrlevel );
+       (void) set_vector( args->buffer, Clock_driver_vector, 1 );
+      rtems_interrupt_enable( isrlevel );
+    }
+    
+done:
+    return RTEMS_SUCCESSFUL;
+}