From 5f39d8f797fcf01bd94b89ef7ed2bdb76deb2601 Mon Sep 17 00:00:00 2001 From: Cigy Cyriac Date: Tue, 10 Aug 2010 19:18:11 -0400 Subject: [PATCH] Add get_cpu_clock() for powerpc Signed-off-by: Jens Axboe --- arch/arch-ppc.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arch-ppc.h b/arch/arch-ppc.h index 06115387..87198699 100644 --- a/arch/arch-ppc.h +++ b/arch/arch-ppc.h @@ -42,6 +42,23 @@ static inline int arch_ffz(unsigned long bitmask) return 32; return __ilog2(bitmask & -bitmask); } + +static inline unsigned long long get_cpu_clock(void) +{ + unsigned int tbl, tbu0, tbu1; + unsigned long long ret; + + do { + __asm__ __volatile__ ("mftbu %0" : "=r"(tbu0)); + __asm__ __volatile__ ("mftb %0" : "=r"(tbl) ); + __asm__ __volatile__ ("mftbu %0" : "=r"(tbu1)); + } while (tbu0 != tbu1); + + ret = (((unsigned long long)tbu0) << 32) | tbl; + return ret; +} + #define ARCH_HAVE_FFZ +#define ARCH_HAVE_CPU_CLOCK #endif -- 2.25.1