diff --git a/include/boot/linux_layout.h b/include/boot/linux_layout.h
new file mode 100644
index 00000000..92d2f281
--- /dev/null
+++ b/include/boot/linux_layout.h
@@ -0,0 +1,33 @@
+/*
+ * s390 Linux layout definitions
+ *
+ * Copyright IBM Corp. 2020
+ *
+ * s390-tools is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ */
+
+#ifndef LINUX_LAYOUT_H
+#define LINUX_LAYOUT_H
+
+#include "lib/zt_common.h"
+
+/* Entry address offsets */
+#define IMAGE_ENTRY		_AC(0x10000, UL)
+#define IMAGE_ENTRY_KDUMP	_AC(0x10010, UL)
+
+/* Parameter address offsets */
+#define IPL_DEVICE		_AC(0x10400, UL)
+#define INITRD_START		_AC(0x10408, UL)
+#define INITRD_SIZE		_AC(0x10410, UL)
+#define OLDMEM_BASE		_AC(0x10418, UL)
+#define OLDMEM_SIZE		_AC(0x10420, UL)
+#define COMMAND_LINE		_AC(0x10480, UL)
+
+/* Parameter sizes */
+#define COMMAND_LINE_SIZE	896
+
+
+#ifndef __ASSEMBLER__
+#endif /* __ASSEMBLER__ */
+#endif /* LINUX_LAYOUT_H */
diff --git a/zipl/boot/stage3.h b/zipl/boot/stage3.h
index a4a3d7c8..924cfd9d 100644
--- a/zipl/boot/stage3.h
+++ b/zipl/boot/stage3.h
@@ -16,14 +16,9 @@
 #include "s390.h"
 
 #include "boot/ipl.h"
+#include "boot/linux_layout.h"
+
 
-#define IPL_DEVICE		 0x10400UL
-#define INITRD_START		 0x10408UL
-#define INITRD_SIZE		 0x10410UL
-#define OLDMEM_BASE		 0x10418UL
-#define OLDMEM_SIZE		 0x10420UL
-#define COMMAND_LINE		 0x10480UL
-#define COMMAND_LINE_SIZE	 896
 #define COMMAND_LINE_EXTRA       0xE000
 
 #define STAGE3_FLAG_SCSI	 0x0001000000000000ULL
diff --git a/zipl/include/zipl.h b/zipl/include/zipl.h
index acfc738e..204cc215 100644
--- a/zipl/include/zipl.h
+++ b/zipl/include/zipl.h
@@ -14,14 +14,13 @@
 
 #include <stdint.h>
 #include "lib/zt_common.h"
+#include "boot/linux_layout.h"
 
 #define ZIPL_MAGIC			"zIPL"
 #define ZIPL_MAGIC_SIZE			4
 #define DISK_LAYOUT_ID			0x00000001
 
 #define STAGE3_ENTRY			0xa000UL
-#define IMAGE_ENTRY			0x10000UL
-#define IMAGE_ENTRY_KDUMP		0x10010UL
 
 #define STAGE2_LOAD_ADDRESS		0x2000UL
 #define STAGE3_LOAD_ADDRESS		0xa000UL