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diff --git a/lib/libutils/ext/include/trace_levels.h b/lib/libutils/ext/include/trace_levels.h
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+/*
+ * Copyright (c) 2014, STMicroelectronics International N.V.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef TRACE_LEVELS_H
+#define TRACE_LEVELS_H
+
+/*
+ * Trace levels.
+ *
+ * ALWAYS is used when you always want a print to be seen, but it is not always
+ * an error.
+ *
+ * ERROR is used when some kind of error has happened, this is most likely the
+ * print you will use most of the time when you report some kind of error.
+ *
+ * INFO is used when you want to print some 'normal' text to the user.
+ * This is the default level.
+ *
+ * DEBUG is used to print extra information to enter deeply in the module.
+ *
+ * FLOW is used to print the execution flox, typically the in/out of functions.
+ *
+ */
+
+#define TRACE_MIN       1
+#define TRACE_ERROR     TRACE_MIN
+#define TRACE_INFO      2
+#define TRACE_DEBUG     3
+#define TRACE_FLOW      4
+#define TRACE_MAX       TRACE_FLOW
+
+/* Trace level of the casual printf */
+#define TRACE_PRINTF_LEVEL TRACE_ERROR
+
+#endif /*TRACE_LEVELS_H*/