1 /* 2 * linux/include/asm-ppc/timex.h 3 * 4 * ppc architecture timex specifications 5 */ 6 #ifdef __KERNEL__ 7 #ifndef _ASMppc_TIMEX_H 8 #define _ASMppc_TIMEX_H 9 10 #include <linux/config.h> 11 #include <asm/cputable.h> 12 13 #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */ 14 #define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 and CLOCK_TICK_RATE */ 15 #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \ 16 (1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) \ 17 << (SHIFT_SCALE-SHIFT_HZ)) / HZ) 18 19 typedef unsigned long cycles_t; 20 21 /* 22 * For the "cycle" counter we use the timebase lower half. 23 * Currently only used on SMP. 24 */ 25 26 extern cycles_t cacheflush_time; 27 get_cycles(void)28static inline cycles_t get_cycles(void) 29 { 30 cycles_t ret = 0; 31 32 __asm__ __volatile__( 33 "98: mftb %0\n" 34 "99:\n" 35 ".section __ftr_fixup,\"a\"\n" 36 " .long %1\n" 37 " .long 0\n" 38 " .long 98b\n" 39 " .long 99b\n" 40 ".previous" 41 : "=r" (ret) : "i" (CPU_FTR_601)); 42 return ret; 43 } 44 45 #endif 46 47 #define vxtime_lock() do {} while (0) 48 #define vxtime_unlock() do {} while (0) 49 50 #endif /* __KERNEL__ */ 51