mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 07:06:45 +07:00
49 lines
776 B
C
49 lines
776 B
C
#ifndef _ASM_POWERPC_TIMEX_H
|
|
#define _ASM_POWERPC_TIMEX_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* PowerPC architecture timex specifications
|
|
*/
|
|
|
|
#include <asm/cputable.h>
|
|
|
|
#define CLOCK_TICK_RATE 1024000 /* Underlying HZ */
|
|
|
|
typedef unsigned long cycles_t;
|
|
|
|
static inline cycles_t get_cycles(void)
|
|
{
|
|
cycles_t ret;
|
|
|
|
#ifdef __powerpc64__
|
|
|
|
__asm__ __volatile__("mftb %0" : "=r" (ret) : );
|
|
|
|
#else
|
|
/*
|
|
* For the "cycle" counter we use the timebase lower half.
|
|
* Currently only used on SMP.
|
|
*/
|
|
|
|
ret = 0;
|
|
|
|
__asm__ __volatile__(
|
|
"98: mftb %0\n"
|
|
"99:\n"
|
|
".section __ftr_fixup,\"a\"\n"
|
|
" .long %1\n"
|
|
" .long 0\n"
|
|
" .long 98b\n"
|
|
" .long 99b\n"
|
|
".previous"
|
|
: "=r" (ret) : "i" (CPU_FTR_601));
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_TIMEX_H */
|