diff --git a/include/asm-ppc/ohare.h b/include/asm-ppc/ohare.h
new file mode 100644
index 0000000..023b597
--- /dev/null
+++ b/include/asm-ppc/ohare.h
@@ -0,0 +1,48 @@
+/*
+ * ohare.h: definitions for using the "O'Hare" I/O controller chip.
+ *
+ * Copyright (C) 1997 Paul Mackerras.
+ *
+ * BenH: Changed to match those of heathrow (but not all of them). Please
+ *       check if I didn't break anything (especially the media bay).
+ */
+
+/* offset from ohare base for feature control register */
+#define OHARE_MBCR	0x34
+#define OHARE_FCR	0x38
+
+/*
+ * Bits in feature control register.
+ * These were mostly derived by experiment on a powerbook 3400
+ * and may differ for other machines.
+ */
+#define OH_SCC_RESET		1
+#define OH_BAY_POWER_N		2	/* a guess */
+#define OH_BAY_PCI_ENABLE	4	/* a guess */
+#define OH_BAY_IDE_ENABLE	8
+#define OH_BAY_FLOPPY_ENABLE	0x10
+#define OH_IDE0_ENABLE		0x20
+#define OH_IDE0_RESET_N		0x40	/* a guess */
+#define OH_BAY_DEV_MASK		0x1c
+#define OH_BAY_RESET_N		0x80
+#define OH_IOBUS_ENABLE		0x100	/* IOBUS seems to be IDE */
+#define OH_SCC_ENABLE		0x200
+#define OH_MESH_ENABLE		0x400
+#define OH_FLOPPY_ENABLE	0x800
+#define OH_SCCA_IO		0x4000
+#define OH_SCCB_IO		0x8000
+#define OH_VIA_ENABLE		0x10000	/* Is apparently wrong, to be verified */
+#define OH_IDE1_RESET_N		0x800000
+
+/*
+ * Bits to set in the feature control register on PowerBooks.
+ */
+#define PBOOK_FEATURES		(OH_IDE_ENABLE | OH_SCC_ENABLE | \
+				 OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
+
+/*
+ * A magic value to put into the feature control register of the
+ * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
+ * Contributed by Harry Eaton.
+ */
+#define STARMAX_FEATURES	0xbeff7a