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diff --git a/gdb/arc-architecture.h b/gdb/arc-architecture.h
new file mode 100644
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+++ b/gdb/arc-architecture.h
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+/* Target dependent code for ARC processor family, for GDB, the GNU debugger.
+
+   Copyright 2008, 2009 Free Software Foundation, Inc.
+
+   Contributed by ARC International (www.arc.com)
+
+   Authors:
+      Richard Stuckey <richard.stuckey@arc.com>
+
+   This file is part of GDB.
+
+   This program 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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+/******************************************************************************/
+/*                                                                            */
+/* Outline:                                                                   */
+/*     This header file defines an enumeration type for representing the      */
+/*     architectural version of an ARC processor, and associated functions.   */
+/*                                                                            */
+/******************************************************************************/
+
+#ifndef ARC_ARCHITECTURE_H
+#define ARC_ARCHITECTURE_H
+
+/* gdb header files */
+#include "defs.h"
+#include "gdbarch.h"
+#include "bfd/bfd-in2.h"
+
+/* ARC header files */
+#include "arc-support.h"
+
+
+typedef enum arc_processor_version
+{
+    NO_ARCHITECTURE,
+    ARC700,
+    ARC600,
+    A5,
+    A4,
+    UNSUPPORTED_ARCHITECTURE
+} ARC_ProcessorVersion;
+
+
+#define ARCHITECTURE_CHECK(arch, bfd)      arc_check_architecture (arch, bfd, __FILE__, __FUNCTION__)
+
+
+void arc_architecture_is_unknown (void);
+
+ARC_ProcessorVersion arc_get_architecture (ReadRegisterFunction read_aux_register);
+
+void arc_update_architecture (ReadRegisterFunction read_register);
+
+void arc_check_architecture (struct gdbarch *gdbarch, bfd *objfile_bfd,
+                             const char* file, const char* function);
+
+ARC_ProcessorVersion arc_version (const char *arch);
+
+const char* arc_version_image (ARC_ProcessorVersion version);
+
+
+#endif /* ARC_ARCHITECTURE_H */
+/******************************************************************************/