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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 */
typedef unsigned long cycles_t;
/*
* For the "cycle" counter we use the timebase lower half.
* Currently only used on SMP.
*/
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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