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authorJamie Iles <jamie.iles@picochip.com>2009-12-11 12:20:09 +0000
committerIngo Molnar <mingo@elte.hu>2009-12-11 13:50:21 +0100
commit58e9f94138c1d9c47f6a63632ca7a78fc6dcc15f (patch)
treecaa7d67b5b8f48a8f04ae908e89b7c9a00c852e0 /tools
parent99ac64c826e62a07e5818cfde620be4d524f1edf (diff)
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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/perf.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 454d5d55f32..75f941bfba9 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -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>