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authorArnaldo Carvalho de Melo <acme@redhat.com>2015-05-07 17:09:48 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-08 16:05:05 -0300
commit827634added7f38b7d724cab1dccdb2b004c13c3 (patch)
tree6b388182e643c6c906178b5dac30949d766b4aeb /tools
parentc6e39db1d0284ff573f171b6754837d39b8a358d (diff)
downloadlinux-827634added7f38b7d724cab1dccdb2b004c13c3.tar.gz
perf tools: Move sh barrier.h stuff to tools/arch/sh/include/asm/barrier.h
We will need it for atomic.h, so move it from the ad-hoc tools/perf/ place to a tools/ subset of the kernel arch/ hierarchy. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-6xqb97k782wqp1r3v6jqayki@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/arch/sh/include/asm/barrier.h32
-rw-r--r--tools/include/asm/barrier.h2
-rw-r--r--tools/perf/MANIFEST1
-rw-r--r--tools/perf/perf-sys.h9
4 files changed, 35 insertions, 9 deletions
diff --git a/tools/arch/sh/include/asm/barrier.h b/tools/arch/sh/include/asm/barrier.h
new file mode 100644
index 000000000000..c18fd7599b97
--- /dev/null
+++ b/tools/arch/sh/include/asm/barrier.h
@@ -0,0 +1,32 @@
+/*
+ * Copied from the kernel sources:
+ *
+ * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
+ * Copyright (C) 2002 Paul Mundt
+ */
+#ifndef __TOOLS_LINUX_ASM_SH_BARRIER_H
+#define __TOOLS_LINUX_ASM_SH_BARRIER_H
+
+/*
+ * A brief note on ctrl_barrier(), the control register write barrier.
+ *
+ * Legacy SH cores typically require a sequence of 8 nops after
+ * modification of a control register in order for the changes to take
+ * effect. On newer cores (like the sh4a and sh5) this is accomplished
+ * with icbi.
+ *
+ * Also note that on sh4a in the icbi case we can forego a synco for the
+ * write barrier, as it's not necessary for control registers.
+ *
+ * Historically we have only done this type of barrier for the MMUCR, but
+ * it's also necessary for the CCR, so we make it generic here instead.
+ */
+#if defined(__SH4A__) || defined(__SH5__)
+#define mb() __asm__ __volatile__ ("synco": : :"memory")
+#define rmb() mb()
+#define wmb() mb()
+#endif
+
+#include <asm-generic/barrier.h>
+
+#endif /* __TOOLS_LINUX_ASM_SH_BARRIER_H */
diff --git a/tools/include/asm/barrier.h b/tools/include/asm/barrier.h
index 7eb88946e072..1338c8a404ef 100644
--- a/tools/include/asm/barrier.h
+++ b/tools/include/asm/barrier.h
@@ -4,4 +4,6 @@
#include "../../arch/powerpc/include/asm/barrier.h"
#elif defined(__s390__)
#include "../../arch/s390/include/asm/barrier.h"
+#elif defined(__sh__)
+#include "../../arch/sh/include/asm/barrier.h"
#endif
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index ac62cafa62ec..2ceb1b262729 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -1,6 +1,7 @@
tools/perf
tools/arch/powerpc/include/asm/barrier.h
tools/arch/s390/include/asm/barrier.h
+tools/arch/sh/include/asm/barrier.h
tools/arch/x86/include/asm/barrier.h
tools/scripts
tools/build
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index f44e53efd9a4..7ef5e821d418 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -46,15 +46,6 @@
#endif
#ifdef __sh__
-#if defined(__SH4A__) || defined(__SH5__)
-# define mb() asm volatile("synco" ::: "memory")
-# define wmb() asm volatile("synco" ::: "memory")
-# define rmb() asm volatile("synco" ::: "memory")
-#else
-# define mb() asm volatile("" ::: "memory")
-# define wmb() asm volatile("" ::: "memory")
-# define rmb() asm volatile("" ::: "memory")
-#endif
#define CPUINFO_PROC {"cpu type"}
#endif