diff --git a/mocks/include/common/debug.h b/mocks/include/common/debug.h
new file mode 100644
index 0000000..245e698
--- /dev/null
+++ b/mocks/include/common/debug.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef DEBUG_H
+#define DEBUG_H
+
+#include <lib/utils_def.h>
+
+/*
+ * The log output macros print output to the console. These macros produce
+ * compiled log output only if the LOG_LEVEL defined in the makefile (or the
+ * make command line) is greater or equal than the level required for that
+ * type of log output.
+ *
+ * The format expected is the same as for printf(). For example:
+ * INFO("Info %s.\n", "message")    -> INFO:    Info message.
+ * WARN("Warning %s.\n", "message") -> WARNING: Warning message.
+ */
+
+#define LOG_LEVEL_NONE			U(0)
+#define LOG_LEVEL_ERROR			U(10)
+#define LOG_LEVEL_NOTICE		U(20)
+#define LOG_LEVEL_WARNING		U(30)
+#define LOG_LEVEL_INFO			U(40)
+#define LOG_LEVEL_VERBOSE		U(50)
+
+#ifndef __ASSEMBLER__
+
+#include <cdefs.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <drivers/console.h>
+
+/*
+ * Define Log Markers corresponding to each log level which will
+ * be embedded in the format string and is expected by tf_log() to determine
+ * the log level.
+ */
+#define LOG_MARKER_ERROR		"\xa"	/* 10 */
+#define LOG_MARKER_NOTICE		"\x14"	/* 20 */
+#define LOG_MARKER_WARNING		"\x1e"	/* 30 */
+#define LOG_MARKER_INFO			"\x28"	/* 40 */
+#define LOG_MARKER_VERBOSE		"\x32"	/* 50 */
+
+/*
+ * If the log output is too low then this macro is used in place of tf_log()
+ * below. The intent is to get the compiler to evaluate the function call for
+ * type checking and format specifier correctness but let it optimize it out.
+ */
+#define no_tf_log(fmt, ...)				\
+	do {						\
+		if (false) {				\
+			tf_log(fmt, ##__VA_ARGS__);	\
+		}					\
+	} while (false)
+
+#if LOG_LEVEL >= LOG_LEVEL_ERROR
+# define ERROR(...)	tf_log(LOG_MARKER_ERROR __VA_ARGS__)
+#else
+# define ERROR(...)	no_tf_log(LOG_MARKER_ERROR __VA_ARGS__)
+#endif
+
+#if LOG_LEVEL >= LOG_LEVEL_NOTICE
+# define NOTICE(...)	tf_log(LOG_MARKER_NOTICE __VA_ARGS__)
+#else
+# define NOTICE(...)	no_tf_log(LOG_MARKER_NOTICE __VA_ARGS__)
+#endif
+
+#if LOG_LEVEL >= LOG_LEVEL_WARNING
+# define WARN(...)	tf_log(LOG_MARKER_WARNING __VA_ARGS__)
+#else
+# define WARN(...)	no_tf_log(LOG_MARKER_WARNING __VA_ARGS__)
+#endif
+
+#if LOG_LEVEL >= LOG_LEVEL_INFO
+# define INFO(...)	tf_log(LOG_MARKER_INFO __VA_ARGS__)
+#else
+# define INFO(...)	no_tf_log(LOG_MARKER_INFO __VA_ARGS__)
+#endif
+
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+# define VERBOSE(...)	tf_log(LOG_MARKER_VERBOSE __VA_ARGS__)
+#else
+# define VERBOSE(...)	no_tf_log(LOG_MARKER_VERBOSE __VA_ARGS__)
+#endif
+
+#if ENABLE_BACKTRACE
+void backtrace(const char *cookie);
+#else
+#define backtrace(x)
+#endif
+
+void __dead2 do_panic(void);
+
+#define panic()				\
+	do {				\
+		backtrace(__func__);	\
+		(void)console_flush();	\
+		do_panic();		\
+	} while (false)
+
+/* Function called when stack protection check code detects a corrupted stack */
+void __dead2 __stack_chk_fail(void);
+
+void tf_log(const char *fmt, ...) __printflike(1, 2);
+void tf_log_set_max_level(unsigned int log_level);
+
+#endif /* __ASSEMBLER__ */
+#endif /* DEBUG_H */