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usr
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src
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linux-headers-4.4.0-206
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arch
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powerpc
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include
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asm
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timex.h
#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__( #ifdef CONFIG_8xx "97: mftb %0\n" #else "97: mfspr %0, %2\n" #endif "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" #ifdef CONFIG_8xx : "=r" (ret) : "i" (CPU_FTR_601)); #else : "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL)); #endif return ret; #endif } #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_TIMEX_H */
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