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diff --git a/nuttx/arch/x86/include/i486/types.h b/nuttx/arch/x86/include/i486/types.h
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+/************************************************************************
+ * arch/x86/include/i486/types.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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 OWNER 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.
+ *
+ ************************************************************************/
+
+/* This file should never be included directed but, rather, only
+ * indirectly through arch/types.h (which is, in turn only accessed
+ * through sys/types.h or stdint.h).
+ */
+
+#ifndef __ARCH_X86_INCLUDE_I486_TYPES_H
+#define __ARCH_X86_INCLUDE_I486_TYPES_H
+
+/************************************************************************
+ * Included Files
+ ************************************************************************/
+
+/************************************************************************
+ * Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Type Declarations
+ ************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/* These are the sizes of the standard integer types.  NOTE that these type
+ * names have a leading underscore character.  This file will be included
+ * (indirectly) by include/stdint.h and typedef'ed to the final name without
+ * the underscore character.  This roundabout way of doings things allows
+ * the stdint.h to be removed from the include/ directory in the event that
+ * the user prefers to use the definitions provided by their toolchain header
+ * files
+ */
+
+typedef char               _int8_t;
+typedef unsigned char      _uint8_t;
+
+typedef short              _int16_t;
+typedef unsigned short     _uint16_t;
+
+typedef int                _int32_t;
+typedef unsigned int       _uint32_t;
+
+typedef long long          _int64_t;
+typedef unsigned long long _uint64_t;
+#define __INT64_DEFINED
+
+/* A pointer is 4 bytes */
+
+typedef unsigned int       _intptr_t;
+typedef unsigned int       _uintptr_t;
+
+/* This is the size of the interrupt state save returned by
+ * irqsave()
+ */
+
+typedef unsigned int       irqstate_t;
+
+#endif /* __ASSEMBLY__ */
+
+/************************************************************************
+ * Global Function Prototypes
+ ************************************************************************/
+
+#endif /* __ARCH_X86_INCLUDE_I486_TYPES_H */