[U-Boot-Users] A question about the raminit in u-boot

Dear All: I have a question about the u-boot: I use a 128M board, the u-boot is OK, but when I changed the same config board, except the ram changed to 256M, it crashed when going into relocate_code() in board.c, and not going into board_init_r(), I had changed in mpc8260ADS.c initdram(), from 128 to 256, and changed the BR2 registers in mpc8260ADS.h. What's the other need to be changed? thanks!