From: Luotao Fu <l.fu@pengutronix.de>
To: mingo@elte.hu
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
Robert Schwebel <r.schwebel@pengutronix.de>
Subject: [PATCH] latency tracer support for ARM ep93xx platform
Date: Wed, 1 Nov 2006 15:51:00 +0100 [thread overview]
Message-ID: <20061101145100.GB25890@localhost.localdomain> (raw)
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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
Pengutronix - Linux Solutions for Science and Industry
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Adds latency tracer support for ep93xx platform.
Signed-off-by: Luotao Fu <lfu@pengutronix.de>
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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reply other threads:[~2006-11-01 14:48 UTC|newest]
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