1/* 2 * Copyright (C) 2004-2006 Atmel Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8#ifndef __ASM_AVR32_TIMEX_H 9#define __ASM_AVR32_TIMEX_H 10 11/* 12 * This is the frequency of the timer used for Linux's timer interrupt. 13 * The value should be defined as accurate as possible or under certain 14 * circumstances Linux timekeeping might become inaccurate or fail. 15 * 16 * For many system the exact clockrate of the timer isn't known but due to 17 * the way this value is used we can get away with a wrong value as long 18 * as this value is: 19 * 20 * - a multiple of HZ 21 * - a divisor of the actual rate 22 * 23 * 500000 is a good such cheat value. 24 * 25 * The obscure number 1193182 is the same as used by the original i8254 26 * time in legacy PC hardware; the chip is never found in AVR32 systems. 27 */ 28#define CLOCK_TICK_RATE 500000 /* Underlying HZ */ 29 30typedef unsigned long cycles_t; 31 32static inline cycles_t get_cycles (void) 33{ 34 return 0; 35} 36 37#define ARCH_HAS_READ_CURRENT_TIMER 38 39#endif /* __ASM_AVR32_TIMEX_H */ 40