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#ifndef _ASM_POWERPC_TIMEX_H
#define _ASM_POWERPC_TIMEX_H
#ifdef __KERNEL__
/*
* PowerPC architecture timex specifications
*/
#include <asm/cputable.h>
#include <asm/reg.h>
#define CLOCK_TICK_RATE 1024000 /* Underlying HZ */
typedef unsigned long cycles_t;
static inline cycles_t get_cycles(void)
{
#ifdef __powerpc64__
return mftb();
#else
cycles_t ret;
/*
* For the "cycle" counter we use the timebase lower half.
* Currently only used on SMP.
*/
ret = 0;
__asm__ __volatile__(
"97: mftb %0\n"
"99:\n"
".section __ftr_fixup,\"a\"\n"
".align 2\n"
"98:\n"
" .long %1\n"
" .long 0\n"
" .long 97b-98b\n"
" .long 99b-98b\n"
" .long 0\n"
" .long 0\n"
".previous"
: "=r" (ret) : "i" (CPU_FTR_601));
return ret;
#endif
}
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_TIMEX_H */