RTEMS: bsps/powerpc/include/libcpu/c_clock.h Source File

| RTEMS 5.4-rc2

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c_clock.h
1/*
2 * Clock Tick Device Driver
3 *
4 * This routine utilizes the Decrementer Register common to the PPC family.
5 *
6 * The tick frequency is directly programmed to the configured number of
7 * microseconds per tick.
8 *
9 * COPYRIGHT (c) 1989-1997.
10 * On-Line Applications Research Corporation (OAR).
11 *
12 * The license and distribution terms for this file may in
13 * the file LICENSE in this distribution or at
14 * http://www.rtems.org/license/LICENSE.
15 *
16 * Modified to support the MPC750.
17 * Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr
18 */
19
20#ifndef _LIBCPU_C_CLOCK_H
21#define _LIBCPU_C_CLOCK_H
22
23#include <rtems.h>
24
25/*
26 * These functions and variables represent the API exported by the
27 * CPU to the BSP.
28 */
29
30extern void clockOff (void* unused);
31extern void clockOn (void* unused);
32extern void clockIsr (void* unused);
33/* bookE decrementer is slightly different */
34extern void clockIsrBookE (void *unused);
35extern int clockIsOn (void* unused);
36
37/*
38 * These functions and variables represent the assumptions of this
39 * driver on the BSP.
40 */
41
42extern int BSP_disconnect_clock_handler (void);
43/*
44 * PCI Bus Frequency
45 */
46extern unsigned int BSP_bus_frequency;
47/*
48 * processor clock frequency
49 */
50extern unsigned int BSP_processor_frequency;
51/*
52 * Time base divisior (how many tick for 1 second).
53 */
54extern unsigned int BSP_time_base_divisor;
55
56#endif
rtems.h