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/*
* include/asm-ppc/timex.h
*
* ppc architecture timex specifications
*/
#ifdef __KERNEL__
#ifndef _ASMppc_TIMEX_H
#define _ASMppc_TIMEX_H
#include <linux/config.h>
#include <asm/cputable.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.
*/
extern cycles_t cacheflush_time;
static inline cycles_t get_cycles(void)
{
cycles_t ret = 0;
__asm__ __volatile__(
"98: mftb %0\n"
"99:\n"
".section __ftr_fixup,\"a\"\n"
" .long %1\n"
" .long 0\n"
" .long 98b\n"
" .long 99b\n"
".previous"
: "=r" (ret) : "i" (CPU_FTR_601));
return ret;
}
#endif
#endif /* __KERNEL__ */
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