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- /*
- * linux/include/asm-ppc/timex.h
- *
- * ppc architecture timex specifications
- */
- #ifndef _ASMppc_TIMEX_H
- #define _ASMppc_TIMEX_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 __SMP__
- cycles_t ret;
-
- __asm__("mftb %0" : "=r" (ret) : );
- return ret;
- #else
- return 0;
- #endif
- }
-
- #endif
-