--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -57,6 +57,9 @@ static const unsigned long sdram_bxcr[] 
 #define	      EBC_BXCR_BU_WO			  	      0x00010000
 #define	      EBC_BXCR_BU_RW			  	      0x00018000
 #define	    EBC_BXCR_BW				  	    0x00006000
+#define	      EBC_BXCR_BW_8				      0x00000000
+#define	      EBC_BXCR_BW_16				      0x00002000
+#define	      EBC_BXCR_BW_32				      0x00006000
 #define   EBC_B0AP					  0x10
 #define   EBC_B1AP					  0x11
 #define   EBC_B2AP					  0x12
