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diff --git a/at91lib/peripherals/cp15/cp15.h b/at91lib/peripherals/cp15/cp15.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !Purpose
+/// 
+/// Methods to manage the Coprocessor 15. Coprocessor 15, or System Control 
+/// Coprocessor CP15, is used to configure and control all the items in the 
+/// list below:
+/// • ARM core
+/// • Caches (ICache, DCache and write buffer)
+/// • TCM
+/// • MMU
+/// • Other system options
+/// 
+/// !Usage
+///
+/// -# Enable or disable D cache with Enable_D_Cache and Disable_D_Cache
+/// -# Enable or disable I cache with Enable_I_Cache and Disable_I_Cache
+///
+//------------------------------------------------------------------------------
+
+#ifndef _CP15_H
+#define _CP15_H
+
+#ifdef CP15_PRESENT
+
+//-----------------------------------------------------------------------------
+//         Exported functions
+//-----------------------------------------------------------------------------
+extern void CP15_Enable_I_Cache(void);
+extern unsigned int CP15_Is_I_CacheEnabled(void);
+extern void CP15_Enable_I_Cache(void);
+extern void CP15_Disable_I_Cache(void);
+extern unsigned int CP15_Is_MMUEnabled(void);
+extern void CP15_EnableMMU(void);
+extern void CP15_DisableMMU(void);
+extern unsigned int CP15_Is_DCacheEnabled(void);
+extern void CP15_Enable_D_Cache(void);
+extern void CP15_Disable_D_Cache(void);
+
+//-----------------------------------------------------------------------------
+//         External functions defined in cp15.S
+//-----------------------------------------------------------------------------
+extern unsigned int _readControlRegister(void);
+extern void _writeControlRegister(unsigned int value);
+extern void _waitForInterrupt(void);
+extern void _writeTTB(unsigned int value);
+extern void _writeDomain(unsigned int value);
+extern void _writeITLBLockdown(unsigned int value);
+extern void _prefetchICacheLine(unsigned int value);
+
+#endif // CP15_PRESENT
+
+#endif // #ifndef _CP15_H
+