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diff --git a/bertos/cpu/types.h b/bertos/cpu/types.h
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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2004, 2005, 2006, 2007 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2004 Giovanni Bajo
+ *
+ * -->
+ *
+ * \brief CPU-specific type definitions.
+ *
+ * \author Giovanni Bajo <rasky@develer.com>
+ * \author Bernardo Innocenti <bernie@develer.com>
+ * \author Stefano Fedrigo <aleph@develer.com>
+ * \author Francesco Sacchi <batt@develer.com>
+ */
+#ifndef CPU_TYPES_H
+#define CPU_TYPES_H
+
+#include "detect.h"
+#include "attr.h"
+#include <cfg/compiler.h> /* for uintXX_t */
+
+#if CPU_I196
+
+	typedef uint16_t cpuflags_t; // FIXME
+	typedef unsigned int cpustack_t;
+	#warning Verify following constant
+	#define SIZEOF_CPUSTACK_T 2
+
+#elif CPU_X86
+
+	/* Get IRQ_* definitions from the hosting environment. */
+	#include <cfg/os.h>
+	#if OS_EMBEDDED
+		typedef uint32_t cpuflags_t; // FIXME
+	#endif /* OS_EMBEDDED */
+
+	#if CPU_X86_64
+		typedef uint64_t cpustack_t;
+		#define SIZEOF_CPUSTACK_T 8
+	#else
+		typedef uint32_t cpustack_t;
+		#define SIZEOF_CPUSTACK_T 4
+	#endif
+
+#elif CPU_ARM
+
+	typedef uint32_t cpuflags_t;
+	typedef uint32_t cpustack_t;
+	#define SIZEOF_CPUSTACK_T 4
+
+#elif CPU_PPC
+
+	typedef uint32_t cpuflags_t; // FIXME
+	typedef uint32_t cpustack_t; // FIXME
+	#define SIZEOF_CPUSTACK_T 4
+
+#elif CPU_DSP56K
+
+	typedef uint16_t cpuflags_t;
+	typedef unsigned int cpustack_t;
+	#warning Verify following costant
+	#define SIZEOF_CPUSTACK_T 2
+
+#elif CPU_AVR
+
+	typedef uint8_t cpuflags_t;
+	typedef uint8_t cpustack_t;
+	#define SIZEOF_CPUSTACK_T 1
+
+#else
+	#error No CPU_... defined.
+#endif
+
+/**
+ * \name Default type sizes.
+ *
+ * These defaults are reasonable for most 16/32bit machines.
+ * Some of these macros may be overridden by CPU-specific code above.
+ *
+ * ANSI C requires that the following equations be true:
+ * \code
+ *   sizeof(char) <= sizeof(short) <= sizeof(int) <= sizeof(long)
+ *   sizeof(float) <= sizeof(double)
+ *   CPU_BITS_PER_CHAR  >= 8
+ *   CPU_BITS_PER_SHORT >= 8
+ *   CPU_BITS_PER_INT   >= 16
+ *   CPU_BITS_PER_LONG  >= 32
+ * \endcode
+ * \{
+ */
+#ifndef SIZEOF_CHAR
+#define SIZEOF_CHAR  1
+#endif
+
+#ifndef SIZEOF_SHORT
+#define SIZEOF_SHORT  2
+#endif
+
+#ifndef SIZEOF_INT
+#if CPU_REG_BITS < 32
+	#define SIZEOF_INT  2
+#else
+	#define SIZEOF_INT  4
+#endif
+#endif /* !SIZEOF_INT */
+
+#ifndef SIZEOF_LONG
+#if CPU_REG_BITS > 32
+	#define SIZEOF_LONG  8
+#else
+	#define SIZEOF_LONG  4
+#endif
+#endif
+
+#ifndef SIZEOF_PTR
+#if CPU_REG_BITS < 32
+	#define SIZEOF_PTR   2
+#elif CPU_REG_BITS == 32
+	#define SIZEOF_PTR   4
+#else /* CPU_REG_BITS > 32 */
+	#define SIZEOF_PTR   8
+#endif
+#endif
+
+#ifndef CPU_BITS_PER_CHAR
+#define CPU_BITS_PER_CHAR   (SIZEOF_CHAR * 8)
+#endif
+
+#ifndef CPU_BITS_PER_SHORT
+#define CPU_BITS_PER_SHORT  (SIZEOF_SHORT * CPU_BITS_PER_CHAR)
+#endif
+
+#ifndef CPU_BITS_PER_INT
+#define CPU_BITS_PER_INT    (SIZEOF_INT * CPU_BITS_PER_CHAR)
+#endif
+
+#ifndef CPU_BITS_PER_LONG
+#define CPU_BITS_PER_LONG   (SIZEOF_LONG * CPU_BITS_PER_CHAR)
+#endif
+
+#ifndef CPU_BITS_PER_PTR
+#define CPU_BITS_PER_PTR    (SIZEOF_PTR * CPU_BITS_PER_CHAR)
+#endif
+
+
+/*\}*/
+
+/* Sanity checks for the above definitions */
+STATIC_ASSERT(sizeof(char) == SIZEOF_CHAR);
+STATIC_ASSERT(sizeof(short) == SIZEOF_SHORT);
+STATIC_ASSERT(sizeof(long) == SIZEOF_LONG);
+STATIC_ASSERT(sizeof(int) == SIZEOF_INT);
+STATIC_ASSERT(sizeof(void *) == SIZEOF_PTR);
+STATIC_ASSERT(sizeof(int8_t) * CPU_BITS_PER_CHAR == 8);
+STATIC_ASSERT(sizeof(uint8_t) * CPU_BITS_PER_CHAR == 8);
+STATIC_ASSERT(sizeof(int16_t) * CPU_BITS_PER_CHAR == 16);
+STATIC_ASSERT(sizeof(uint16_t) * CPU_BITS_PER_CHAR == 16);
+STATIC_ASSERT(sizeof(int32_t) * CPU_BITS_PER_CHAR == 32);
+STATIC_ASSERT(sizeof(uint32_t) * CPU_BITS_PER_CHAR == 32);
+#ifdef __HAS_INT64_T__
+STATIC_ASSERT(sizeof(int64_t) * CPU_BITS_PER_CHAR == 64);
+STATIC_ASSERT(sizeof(uint64_t) * CPU_BITS_PER_CHAR == 64);
+#endif
+STATIC_ASSERT(sizeof(cpustack_t) == SIZEOF_CPUSTACK_T);
+
+
+#endif /* CPU_TYPES_H */