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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
"
#else
"97: mfspr %0, %2
"
#endif
"99:
"
".section __ftr_fixup,\"a\"
"
".align 2
"
"98:
"
" .long %1
"
" .long 0
"
" .long 97b-98b
"
" .long 99b-98b
"
" .long 0
"
" .long 0
"
".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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