diff options
author | Dmitry Torokhov <dtor_core@ameritech.net> | 2005-09-09 20:14:47 -0500 |
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committer | Dmitry Torokhov <dtor_core@ameritech.net> | 2005-09-09 20:14:47 -0500 |
commit | d344c5e0856ad03278d8700b503762dbc8b86e12 (patch) | |
tree | a6d893a643470a3c2580a58f3228a55fa1fd1d82 /include/asm-powerpc/timex.h | |
parent | 010988e888a0abbe7118635c1b33d049caae6b29 (diff) | |
parent | 87fc767b832ef5a681a0ff9d203c3289bc3be2bf (diff) |
Manual merge with Linus
Diffstat (limited to 'include/asm-powerpc/timex.h')
-rw-r--r-- | include/asm-powerpc/timex.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/asm-powerpc/timex.h b/include/asm-powerpc/timex.h new file mode 100644 index 00000000000..51c5b316be5 --- /dev/null +++ b/include/asm-powerpc/timex.h @@ -0,0 +1,49 @@ +#ifndef _ASM_POWERPC_TIMEX_H +#define _ASM_POWERPC_TIMEX_H + +#ifdef __KERNEL__ + +/* + * PowerPC architecture timex specifications + */ + +#include <linux/config.h> +#include <asm/cputable.h> + +#define CLOCK_TICK_RATE 1193180 /* 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 */ |