diff --git a/kernel/cls.c b/kernel/cls.c
index a28d552e..23b7dc76 100644
--- a/kernel/cls.c
+++ b/kernel/cls.c
@@ -1,3 +1,15 @@
+/**
+ * \file cls.c
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  Initialization of cpu local variable
+ * \author Taku Shimosawa  <shimosawa@is.s.u-tokyo.ac.jp> \par
+ * Copyright (C) 2011 - 2012  Taku Shimosawa
+ */
+/*
+ * HISTORY:
+ */
+
 #include <kmsg.h>
 #include <string.h>
 #include <ihk/cpu.h>
diff --git a/kernel/copy.c b/kernel/copy.c
index 4da87e4b..62aef87f 100644
--- a/kernel/copy.c
+++ b/kernel/copy.c
@@ -1,3 +1,15 @@
+/**
+ * \file copy.c
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  Memory copy using DMA controller
+ * \author Taku Shimosawa  <shimosawa@is.s.u-tokyo.ac.jp> \par
+ * Copyright (C) 2011 - 2012  Taku Shimosawa
+ */
+/*
+ * HISTORY:
+ */
+
 #include <ihk/dma.h>
 #include <amemcpy.h>
 
diff --git a/kernel/debug.c b/kernel/debug.c
index 72a901c2..e3497d54 100644
--- a/kernel/debug.c
+++ b/kernel/debug.c
@@ -1,3 +1,15 @@
+/**
+ * \file debug.c
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  Output to kmsg
+ * \author Taku Shimosawa  <shimosawa@is.s.u-tokyo.ac.jp> \par
+ * Copyright (C) 2011 - 2012  Taku Shimosawa
+ */
+/*
+ * HISTORY:
+ */
+
 #include <stdarg.h>
 #include <string.h>
 #include <kmsg.h>
diff --git a/kernel/listeners.c b/kernel/listeners.c
index 551b8f36..e99e9ed9 100644
--- a/kernel/listeners.c
+++ b/kernel/listeners.c
@@ -1,3 +1,15 @@
+/**
+ * \file listeners.c
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  Usage example of ihk_ikc_listen_port()
+ * \author Taku Shimosawa  <shimosawa@is.s.u-tokyo.ac.jp> \par
+ * Copyright (C) 2011 - 2012  Taku Shimosawa
+ */
+/*
+ * HISTORY:
+ */
+
 #include <types.h>
 #include <kmsg.h>
 #include <ihk/cpu.h>
diff --git a/kernel/mikc.c b/kernel/mikc.c
index 4d8de6c5..48c0bd98 100644
--- a/kernel/mikc.c
+++ b/kernel/mikc.c
@@ -1,3 +1,15 @@
+/**
+ * \file mikc.c
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  Initialization of IKC master channel
+ * \author Taku Shimosawa  <shimosawa@is.s.u-tokyo.ac.jp> \par
+ * Copyright (C) 2011 - 2012  Taku Shimosawa
+ */
+/*
+ * HISTORY:
+ */
+
 #include <kmsg.h>
 #include <ihk/cpu.h>
 #include <ihk/debug.h>