forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
41 lines
691 B
C
41 lines
691 B
C
/*
|
|
* include/asm-ppc/timex.h
|
|
*
|
|
* ppc architecture timex specifications
|
|
*/
|
|
#ifdef __KERNEL__
|
|
#ifndef _ASMppc_TIMEX_H
|
|
#define _ASMppc_TIMEX_H
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/cputable.h>
|
|
|
|
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
|
|
|
|
typedef unsigned long cycles_t;
|
|
|
|
/*
|
|
* For the "cycle" counter we use the timebase lower half.
|
|
* Currently only used on SMP.
|
|
*/
|
|
|
|
static inline cycles_t get_cycles(void)
|
|
{
|
|
cycles_t 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));
|
|
return ret;
|
|
}
|
|
|
|
#endif
|
|
#endif /* __KERNEL__ */
|