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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.rtems.com/license/LICENSE.
*
* Modified to support the MPC750.
* Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr
*/
#ifndef _LIBCPU_C_CLOCK_H
#define _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* unused);
/* bookE decrementer is slightly different */
extern void clockIsrBookE (void *unused);
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
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