blob: c55e14f7ef445486ccb2ba9c938934706ce2be0d (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#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__(
"97: mftb %0\n"
"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"
: "=r" (ret) : "i" (CPU_FTR_601));
return ret;
#endif
}
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_TIMEX_H */
|
