Hi,
the following patch adds hardware support for the latency tracer in -rt
patch on ARM ep93xx platform.
regards
Luotao Fu
--
Dipl.-Ing. Luotao Fu | http://www.pengutronix.de
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Adds latency tracer support for ep93xx platform. Signed-off-by: Luotao Fu <[email protected]> Index: linux-2.6.18-rt.sec/include/asm-arm/arch-ep93xx/timex.h =================================================================== --- include/asm-arm/arch-ep93xx/timex.h +++ include/asm-arm/arch-ep93xx/timex.h @@ -3,3 +3,10 @@ */ #define CLOCK_TICK_RATE 983040 + +#include <asm/io.h> +#include <asm-arm/arch-ep93xx/ep93xx-regs.h> + +#define mach_read_cycles() readl(EP93XX_TIMER4_VALUE_LOW) +#define mach_cycles_to_usecs(d) (((d) * ((1000000LL << 32) / CLOCK_TICK_RATE)) >> 32) +#define mach_usecs_to_cycles(d) (((d) * (((long long)CLOCK_TICK_RATE << 32) / 1000000)) >> 32)
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