--- /dev/null
+/*
+ * Copyright (c) 2004 Cray Inc.
+ *
+ * The contents of this file is proprietary information of Cray Inc.
+ * and may not be disclosed without prior written consent.
+ *
+ */
+/*
+ * This code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+
+#ifndef __RCA_L0_LINUX_H__
+#define __RCA_L0_LINUX_H__
+
+#include <lwk/version.h>
+
+/*
+ * LINUX:
+ * This works as long as the physical address is below 4GB and a static
+ * page table mapping has been setup for this address. This macro is
+ * intended to be used before ioremap() is available for e.g in the case
+ * of early_printk.
+ */
+#define rca_l0_comm_va(addr) \
+ (void*)(((unsigned long)0xFFFFFFFF << 32) | (unsigned long)(addr))
+
+extern int l0rca_os_init(void);
+
+#endif /* __RCA_L0_LINUX_H__ */
