/* * 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; } extern int read_current_timer(unsigned long *timer_value); #define ARCH_HAS_READ_CURRENT_TIMER 1 #endif /* __ASM_AVR32_TIMEX_H */