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gerrit-public.fairphone.software / kernel / msm / 0909c8c2d547e45ca50e2492b08ec93a37b35237 / . / include / asm-powerpc / timex.h
blob: e3f08cf91486afdc7b5e1b8cd33da1de5b3144a3 [file] [log] [blame]
jdl@freescale.comdd56fdf2005-09-07 15:59:48 -0500[diff] [blame]1#ifndef _ASM_POWERPC_TIMEX_H
2#define _ASM_POWERPC_TIMEX_H
3
4#ifdef __KERNEL__
5
6/*
7 * PowerPC architecture timex specifications
8 */
9
jdl@freescale.comdd56fdf2005-09-07 15:59:48 -0500[diff] [blame]10#include <asm/cputable.h>
11
Benjamin Herrenschmidtcbd27b82005-10-12 11:39:33 +1000[diff] [blame]12#define CLOCK_TICK_RATE 1024000 /* Underlying HZ */
jdl@freescale.comdd56fdf2005-09-07 15:59:48 -0500[diff] [blame]13
14typedef unsigned long cycles_t;
15
16static inline cycles_t get_cycles(void)
17{
18 cycles_t ret;
19
20#ifdef __powerpc64__
21
22 __asm__ __volatile__("mftb %0" : "=r" (ret) : );
23
24#else
25 /*
26 * For the "cycle" counter we use the timebase lower half.
27 * Currently only used on SMP.
28 */
29
30 ret = 0;
31
32 __asm__ __volatile__(
Benjamin Herrenschmidt0909c8c2006-10-20 11:47:18 +1000[diff] [blame^]33 "97: mftb %0\n"
jdl@freescale.comdd56fdf2005-09-07 15:59:48 -0500[diff] [blame]34 "99:\n"
35 ".section __ftr_fixup,\"a\"\n"
Benjamin Herrenschmidt0909c8c2006-10-20 11:47:18 +1000[diff] [blame^]36 ".align 2\n"
37 "98:\n"
jdl@freescale.comdd56fdf2005-09-07 15:59:48 -0500[diff] [blame]38 " .long %1\n"
39 " .long 0\n"
Benjamin Herrenschmidt0909c8c2006-10-20 11:47:18 +1000[diff] [blame^]40 " .long 97b-98b\n"
41 " .long 99b-98b\n"
jdl@freescale.comdd56fdf2005-09-07 15:59:48 -0500[diff] [blame]42 ".previous"
43 : "=r" (ret) : "i" (CPU_FTR_601));
44#endif
45
46 return ret;
47}
48
49#endif /* __KERNEL__ */
50#endif /* _ASM_POWERPC_TIMEX_H */