linux/arch/openrisc/include/asm/timex.h
Jonas Bonn b731fbbd24 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 <jonas@southpole.se>
Cc: tglx@linutronix.de
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2011-07-22 18:46:32 +02:00

37 lines
884 B
C

/*
* 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 <jonas@southpole.se>
*
* 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 <asm-generic/timex.h>
#include <asm/spr.h>
#include <asm/spr_defs.h>
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