Commit 58e9f941 authored Dec 11, 2009 by Jamie Iles Committed by Ingo Molnar Dec 11, 2009

perf tools: Allow building for ARM



Add definitions of rmb() and cpu_relax() and include the ARM
unistd.h header. The __kuser_memory_barrier helper in the helper
page is used to provide the correct memory barrier depending on
the CPU type.

[ The rmb() will work on v6 and v7, segfault on v5. Dynamic
  detection to add v5 support will be added later. ]

Signed-off-by: Jamie Iles <jamie.iles@picochip.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mikael Pettersson <mikpe@it.uu.se>
LKML-Reference: <1260534009-5394-1-git-send-email-jamie.iles@picochip.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 99ac64c8

tools/perf/perf.h

+12 −0

Original line number	Diff line number	Diff line
		@@ -59,6 +59,18 @@
		#define cpu_relax() asm volatile ("hint @pause" ::: "memory")
		#endif

		#ifdef __arm__
		#include "../../arch/arm/include/asm/unistd.h"
		/*
		* Use the __kuser_memory_barrier helper in the CPU helper page. See
		* arch/arm/kernel/entry-armv.S in the kernel source for details.
		*/
		#define rmb() asm volatile("mov r0, #0xffff0fff; mov lr, pc;" \
		"sub pc, r0, #95" ::: "r0", "lr", "cc", \
		"memory")
		#define cpu_relax() asm volatile("":::"memory")
		#endif

		#include <time.h>
		#include <unistd.h>
		#include <sys/types.h>