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diff --git a/bsps/sparc64/include/arch/sun4u/arch.h b/bsps/sparc64/include/arch/sun4u/arch.h
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+++ b/bsps/sparc64/include/arch/sun4u/arch.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2005 Jakub Jermar
+ * 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 following disclaimer.
+ * - 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.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/** @addtogroup sparc64	
+ * @{
+ */
+/**
+ * @file
+ * @brief	Various sun4u-specific macros.
+ */
+
+#ifndef KERN_sparc64_sun4u_ARCH_H_
+#define KERN_sparc64_sun4u_ARCH_H_
+
+#define ASI_NUCLEUS_QUAD_LDD	0x24	/** ASI for 16-byte atomic loads. */
+#define ASI_DCACHE_TAG		0x47	/** ASI D-Cache Tag. */
+#define ASI_ICBUS_CONFIG	0x4a	/** ASI of the UPA_CONFIG/FIREPLANE_CONFIG register. */
+
+#endif
+
+/** @}
+ */