#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" ".previous" : "=r" (ret) : "i" (CPU_FTR_601)); return ret; #endif } #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_TIMEX_H */