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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-09-14 14:19:08 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-09-14 14:19:08 +0200 |
| commit | 905ec87e93bc9e01b15c60035cd6a50c636cbaef (patch) | |
| tree | 46fd7618d6511611ffc19eb0dd4d7bc6b90a41c2 /include/asm-powerpc/timex.h | |
| parent | Merge /spare/repo/linux-2.6/ (diff) | |
| parent | Linux 2.6.14-rc1 (diff) | |
| download | linux-905ec87e93bc9e01b15c60035cd6a50c636cbaef.tar.xz linux-905ec87e93bc9e01b15c60035cd6a50c636cbaef.zip | |
Merge /spare/repo/linux-2.6/
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 000000000000..51c5b316be55 --- /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 */ |