From b731fbbd246e3aba59701bd6112a14ba02bf1c1c Mon Sep 17 00:00:00 2001 From: Jonas Bonn Date: Sat, 4 Jun 2011 22:18:12 +0300 Subject: OpenRISC: Timekeeping Implements support for the OpenRISC timer which is a 28 bit cycle counter that can be read out of a special purpose register. This counter is used as a both a clock event and clocksource device. Signed-off-by: Jonas Bonn Cc: tglx@linutronix.de Reviewed-by: Arnd Bergmann --- arch/openrisc/include/asm/timex.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 arch/openrisc/include/asm/timex.h (limited to 'arch/openrisc/include/asm/timex.h') diff --git a/arch/openrisc/include/asm/timex.h b/arch/openrisc/include/asm/timex.h new file mode 100644 index 0000000..9935cad --- /dev/null +++ b/arch/openrisc/include/asm/timex.h @@ -0,0 +1,36 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2010-2011 Jonas Bonn + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC_TIMEX_H +#define __ASM_OPENRISC_TIMEX_H + +#define get_cycles get_cycles + +#include +#include +#include + +static inline cycles_t get_cycles(void) +{ + return mfspr(SPR_TTCR); +} + +/* This isn't really used any more */ +#define CLOCK_TICK_RATE 1000 + +#define ARCH_HAS_READ_CURRENT_TIMER + +#endif -- cgit v1.1