Index: simplebus.c
===================================================================
--- simplebus.c	(revision 230313)
+++ simplebus.c	(working copy)
@@ -158,14 +158,14 @@
 
 	sc = device_get_softc(dev);
 
-	sc->sc_start_pa = fdt_immr_pa;
-	sc->sc_start_va = fdt_immr_va;
-	sc->sc_size = fdt_immr_size;
-
 	/*
 	 * Walk simple-bus and add direct subordinates as our children.
 	 */
 	dt_node = ofw_bus_get_node(dev);
+	fdt_get_range(dt_node, 0, &sc->sc_start_pa, &sc->sc_size);
+	if (bus_space_map(fdtbus_bs_tag, sc->sc_start_pa, sc->sc_size,
+	    0, &sc->sc_start_va))
+		panic("Couldn't map simplebus memory");
 	for (dt_child = OF_child(dt_node); dt_child != 0;
 	    dt_child = OF_peer(dt_child)) {