Is it requre any changes in u-boot level. No change to u-boot is required As Pecteilis said, are you storing your uImage in single SPI flash (sf probe 0) or dual SPI flash (sf probe 0:1)? Also, you can try and turn on earlyprintk to see why it is hanging (if it is not the corrupted SPI flash issue) See section 12 of the RZ/A1 Linux BSP Porting Guide renesasrulz.com/.../2719.aspx
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