Hi,

I am trying to install u-boot on my walnut board with PPC405. In file board/walnut405/config.mk, TEXT_BASE is defined as FFFE0000. Does that mean the u-boot.bin has to start from FFFE0000?

My problem is that on my board the address space from FFF80000 to FFFFFFFF is reserved for a special purpose, so I can't put the u-boot.bin at FFFE0000. But if I change the TEXT_BASE to another one, for example FFF00000, then the u-boot.bin generated by the compiler is FFFFFFFF - FFF00000 = 1MB. It means I still can't put the u-boot.bin to FFF00000 because it will overwrite the reserved address space anyway. I understand that u-boot is trying to fill the gap between TEXT_BASE and the end of the flash. So my question is:

1. If I use TEXT_BASE = FFFE0000 and simply put the u-boot.bin generated to FFF00000, will it mess up the addressing in the u-boot?

2. If the answer for 1 is yes, how can I move up the end of flash to FFF80000 so that the u-boot.bin will fill from FFF00000 to FFF80000 instead of from FFF00000 to FFFFFFFF?

Thanks, Frank

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