40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
#ifndef __ASM_AVR32_TIMEX_H
|
||
|
|
#define __ASM_AVR32_TIMEX_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This is the frequency of the timer used for Linux's timer interrupt.
|
||
|
|
* The value should be defined as accurate as possible or under certain
|
||
|
|
* circumstances Linux timekeeping might become inaccurate or fail.
|
||
|
|
*
|
||
|
|
* For many system the exact clockrate of the timer isn't known but due to
|
||
|
|
* the way this value is used we can get away with a wrong value as long
|
||
|
|
* as this value is:
|
||
|
|
*
|
||
|
|
* - a multiple of HZ
|
||
|
|
* - a divisor of the actual rate
|
||
|
|
*
|
||
|
|
* 500000 is a good such cheat value.
|
||
|
|
*
|
||
|
|
* The obscure number 1193182 is the same as used by the original i8254
|
||
|
|
* time in legacy PC hardware; the chip is never found in AVR32 systems.
|
||
|
|
*/
|
||
|
|
#define CLOCK_TICK_RATE 500000 /* Underlying HZ */
|
||
|
|
|
||
|
|
typedef unsigned long cycles_t;
|
||
|
|
|
||
|
|
static inline cycles_t get_cycles (void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ARCH_HAS_READ_CURRENT_TIMER
|
||
|
|
|
||
|
|
#endif /* __ASM_AVR32_TIMEX_H */
|