I have BF533-EZKIT. But also have own hardware on BF533 (and u-boot yet not work) . Therefore I am study everything deeple : )
In include/configs/bf533-ezkit.h file I define:
#define CONFIG_BFIN_BOOT_MODE BFIN_BOOT_PARA
After compiling I have u-boot.ldr - image for use boot ROM to boot from flash. What type of image: 8 or 16-bit and how is it defined?