diff --git a/include/asm-ppc64/naca.h b/include/asm-ppc64/naca.h
new file mode 100644
index 0000000..bfb7caa
--- /dev/null
+++ b/include/asm-ppc64/naca.h
@@ -0,0 +1,31 @@
+#ifndef _NACA_H
+#define _NACA_H
+
+/* 
+ * c 2001 PPC 64 Team, IBM Corp
+ *
+ * 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
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <asm/types.h>
+
+#ifndef __ASSEMBLY__
+
+struct naca_struct {
+	/* Kernel only data - undefined for user space */
+	void *xItVpdAreas;              /* VPD Data                  0x00 */
+	void *xRamDisk;                 /* iSeries ramdisk           0x08 */
+	u64   xRamDiskSize;		/* In pages                  0x10 */
+};
+
+extern struct naca_struct naca;
+
+#endif /* __ASSEMBLY__ */
+
+#define NACA_PAGE      0x4
+#define NACA_PHYS_ADDR (NACA_PAGE<<PAGE_SHIFT)
+
+#endif /* _NACA_H */