diff --git a/include/asm-ppc/mediabay.h b/include/asm-ppc/mediabay.h
new file mode 100644
index 0000000..9daa325
--- /dev/null
+++ b/include/asm-ppc/mediabay.h
@@ -0,0 +1,31 @@
+/*
+ * mediabay.h: definitions for using the media bay
+ * on PowerBook 3400 and similar computers.
+ *
+ * Copyright (C) 1997 Paul Mackerras.
+ */
+#ifndef _PPC_MEDIABAY_H
+#define _PPC_MEDIABAY_H
+
+#ifdef __KERNEL__
+
+#define MB_FD		0	/* media bay contains floppy drive (automatic eject ?) */
+#define MB_FD1		1	/* media bay contains floppy drive (manual eject ?) */
+#define MB_SOUND	2	/* sound device ? */
+#define MB_CD		3	/* media bay contains ATA drive such as CD or ZIP */
+#define MB_PCI		5	/* media bay contains a PCI device */
+#define MB_POWER	6	/* media bay contains a Power device (???) */
+#define MB_NO		7	/* media bay contains nothing */
+
+int check_media_bay(struct device_node *which_bay, int what);
+int check_media_bay_by_base(unsigned long base, int what);
+
+/* Number of bays in the machine or 0 */
+extern int media_bay_count;
+
+/* called by pmac-ide.c to register IDE controller for media bay */
+extern int media_bay_set_ide_infos(struct device_node* which_bay,
+			unsigned long base, int irq, int index);
+
+#endif /* __KERNEL__ */
+#endif /* _PPC_MEDIABAY_H */