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/*

 *  Clock Tick Device Driver

 *

 *  This routine utilizes the Decrementer Register common to the PPC family.

 *

 *  The tick frequency is directly programmed to the configured number of

 *  microseconds per tick.

 *

 *  COPYRIGHT (c) 1989-1997.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  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.

 *

 *  Modified to support the MPC750.

 *  Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr

 *

 *  c_clock.h,v 1.4 2001/10/12 21:03:52 joel Exp

 */

#ifndef _LIB_LIBCPU_C_CLOCK_H

#define _LIB_LIBCPU_C_CLOCK_H

#include <rtems.h>

/*

 * These functions and variables represent the API exported by the

 * CPU to the BSP.

 */

extern void clockOff    (void* unused);

extern void clockOn     (void* unused);

extern void clockIsr    (void);

extern int  clockIsOn   (void* unused);

/*

 *  These functions and variables represent the assumptions of this

 *  driver on the BSP.

 */

extern int BSP_disconnect_clock_handler (void);

/*

 * PCI Bus Frequency

 */

extern unsigned int BSP_bus_frequency;

/*

 * processor clock frequency

 */

extern unsigned int BSP_processor_frequency;

/*

 * Time base divisior (how many tick for 1 second).

 */

extern unsigned int BSP_time_base_divisor;

#endif