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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-08-07 09:55:03 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-08-07 09:55:03 +0100 |
| commit | 4fb8af10d0fd09372d52966b76922b9e82bbc950 (patch) | |
| tree | d240e4d40357583e3f3eb228dccf20122a5b31ed /arch/powerpc/include/asm/timex.h | |
| parent | f44f82e8a20b98558486eb14497b2f71c78fa325 (diff) | |
| parent | 64a99d2a8c3ed5c4e39f3ae1cc682aa8fd3977fc (diff) | |
| download | linux-stable-4fb8af10d0fd09372d52966b76922b9e82bbc950.tar.gz linux-stable-4fb8af10d0fd09372d52966b76922b9e82bbc950.tar.bz2 linux-stable-4fb8af10d0fd09372d52966b76922b9e82bbc950.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes
Diffstat (limited to 'arch/powerpc/include/asm/timex.h')
| -rw-r--r-- | arch/powerpc/include/asm/timex.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/timex.h b/arch/powerpc/include/asm/timex.h new file mode 100644 index 000000000000..c55e14f7ef44 --- /dev/null +++ b/arch/powerpc/include/asm/timex.h @@ -0,0 +1,50 @@ +#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 */ |