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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__(
- #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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