--- /dev/null
+--- 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