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-rw-r--r--arch/xtensa/include/asm/ftrace.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/ftrace.h b/arch/xtensa/include/asm/ftrace.h
new file mode 100644
index 000000000..6c6d9a9f1
--- /dev/null
+++ b/arch/xtensa/include/asm/ftrace.h
@@ -0,0 +1,40 @@
+/*
+ * arch/xtensa/include/asm/ftrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2013 Tensilica Inc.
+ */
+#ifndef _XTENSA_FTRACE_H
+#define _XTENSA_FTRACE_H
+
+#include <asm/processor.h>
+
+#ifndef __ASSEMBLY__
+#define ftrace_return_address0 ({ unsigned long a0, a1; \
+ __asm__ __volatile__ ( \
+ "mov %0, a0\n" \
+ "mov %1, a1\n" \
+ : "=r"(a0), "=r"(a1)); \
+ MAKE_PC_FROM_RA(a0, a1); })
+
+#ifdef CONFIG_FRAME_POINTER
+extern unsigned long return_address(unsigned level);
+#define ftrace_return_address(n) return_address(n)
+#endif
+#endif /* __ASSEMBLY__ */
+
+#ifdef CONFIG_FUNCTION_TRACER
+
+#define MCOUNT_ADDR ((unsigned long)(_mcount))
+#define MCOUNT_INSN_SIZE 3
+
+#ifndef __ASSEMBLY__
+extern void _mcount(void);
+#define mcount _mcount
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_FUNCTION_TRACER */
+
+#endif /* _XTENSA_FTRACE_H */