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b731fbbd24
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>
37 lines
884 B
C
37 lines
884 B
C
/*
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* OpenRISC Linux
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* OpenRISC implementation:
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __ASM_OPENRISC_TIMEX_H
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#define __ASM_OPENRISC_TIMEX_H
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#define get_cycles get_cycles
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#include <asm-generic/timex.h>
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#include <asm/spr.h>
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#include <asm/spr_defs.h>
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static inline cycles_t get_cycles(void)
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{
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return mfspr(SPR_TTCR);
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}
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/* This isn't really used any more */
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#define CLOCK_TICK_RATE 1000
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#define ARCH_HAS_READ_CURRENT_TIMER
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#endif
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