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/*
* linux/include/asm-ppc/timex.h
*
* ppc architecture timex specifications
*/
#ifndef _ASMppc_TIMEX_H
#define _ASMppc_TIMEX_H
#include <linux/config.h>
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
#define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 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)
typedef unsigned long cycles_t;
/*
* For the "cycle" counter we use the timebase lower half.
* Currently only used on SMP.
*
* Since SMP kernels won't run on the PPC601 CPU (which doesn't have
* the timebase register) anyway, we don't bother checking the CPU version.
*/
extern cycles_t cacheflush_time;
static inline cycles_t get_cycles(void)
{
#ifdef CONFIG_SMP
cycles_t ret;
__asm__("mftb %0" : "=r" (ret) : );
return ret;
#else
return 0;
#endif
}
#endif
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