diff --git a/arch/powerpc/cpu/mpc512x/Makefile b/arch/powerpc/cpu/mpc512x/Makefile
index 4a4bc0d..b53232f 100644
--- a/arch/powerpc/cpu/mpc512x/Makefile
+++ b/arch/powerpc/cpu/mpc512x/Makefile
@@ -41,6 +41,9 @@
 COBJS-$(CONFIG_IIM) += iim.o
 COBJS-$(CONFIG_PCI) += pci.o
 
+# Stub implementations of cache management functions for USB
+COBJS-$(CONFIG_USB_EHCI) += cache.o
+
 COBJS	:= $(COBJS-y)
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/arch/powerpc/cpu/mpc512x/cache.c b/arch/powerpc/cpu/mpc512x/cache.c
new file mode 100644
index 0000000..2a08b65
--- /dev/null
+++ b/arch/powerpc/cpu/mpc512x/cache.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2012 Marek Vasut <marex@denx.de>
+ *
+ * This file contains stub implementation of
+ *   invalidate_dcache_range()
+ *   flush_dcache_range()
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+}