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/*
* include/asm-xtensa/timex.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001 - 2005 Tensilica Inc.
*/
#ifndef _XTENSA_TIMEX_H
#define _XTENSA_TIMEX_H
#ifdef __KERNEL__
#include <asm/processor.h>
#include <linux/stringify.h>
#if XCHAL_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) == 1
# define LINUX_TIMER 0
#elif XCHAL_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) == 1
# define LINUX_TIMER 1
#elif XCHAL_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) == 1
# define LINUX_TIMER 2
#else
# error "Bad timer number for Linux configurations!"
#endif
#define LINUX_TIMER_INT XCHAL_TIMER_INTERRUPT(LINUX_TIMER)
#define LINUX_TIMER_MASK (1L << LINUX_TIMER_INT)
#define CLOCK_TICK_RATE 1193180 /* (everyone is using this value) */
#define CLOCK_TICK_FACTOR 20 /* Factor of both 10^6 and CLOCK_TICK_RATE */
#define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
(1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) \
<< (SHIFT_SCALE-SHIFT_HZ)) / HZ)
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
extern unsigned long ccount_per_jiffy;
extern unsigned long ccount_nsec;
#define CCOUNT_PER_JIFFY ccount_per_jiffy
#define CCOUNT_NSEC ccount_nsec
#else
#define CCOUNT_PER_JIFFY (CONFIG_XTENSA_CPU_CLOCK*(1000000UL/HZ))
#define CCOUNT_NSEC (1000000000UL / CONFIG_XTENSA_CPU_CLOCK)
#endif
typedef unsigned long long cycles_t;
/*
* Only used for SMP.
*/
extern cycles_t cacheflush_time;
#define get_cycles() (0)
/*
* Register access.
*/
#define WSR_CCOUNT(r) __asm__("wsr %0,"__stringify(CCOUNT) :: "a" (r))
#define RSR_CCOUNT(r) __asm__("rsr %0,"__stringify(CCOUNT) : "=a" (r))
#define WSR_CCOMPARE(x,r) __asm__("wsr %0,"__stringify(CCOMPARE_0)"+"__stringify(x) :: "a"(r))
#define RSR_CCOMPARE(x,r) __asm__("rsr %0,"__stringify(CCOMPARE_0)"+"__stringify(x) : "=a"(r))
static inline unsigned long get_ccount (void)
{
unsigned long ccount;
RSR_CCOUNT(ccount);
return ccount;
}
static inline void set_ccount (unsigned long ccount)
{
WSR_CCOUNT(ccount);
}
static inline unsigned long get_linux_timer (void)
{
unsigned ccompare;
RSR_CCOMPARE(LINUX_TIMER, ccompare);
return ccompare;
}
static inline void set_linux_timer (unsigned long ccompare)
{
WSR_CCOMPARE(LINUX_TIMER, ccompare);
}
#endif /* __KERNEL__ */
#endif /* _XTENSA_TIMEX_H */
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