I'm trying to modify u-boot image for IBM Walnut ref. board to use in the other system(ppc405 core)

but the system has only bootrom of size 128KB, while walnut has 512KB.

the modification i have tried until now is as follows...

========================================================= - modified TEXT_BASE in board/walnut405/config.mk

u-boot.bin is configured as 0000'0000 ~ 0002'B68B : u-boot source data 0002'B68C ~ 0007'FFFB : empty space (filled with FF) 0007'FFFC ~ 0007'FFFF : reset vector

walnut Flash memory map : FFF8'0000 ~ FFFF'FFFF (512KB) porting system bootrom memory map : FFFE'0000 ~ FFFF'FFFF(128KB)

the size of empty space = max 0x0005'4971 possible to reduce, so

change in board/walnut405/config.mk, TEXT_BASE = 0xFFF8'0000 + 0x0005'4971 = 0xFFFD'4971

the result size of u-boot.bin = 173KB or so ... need to be reduced more.

- disable DBGFLAGS = -g, in u-boot_root/config.mk ============================================================

what other methods can you suggest to minimize the size of u-boot without hanging in u-boot operation ??

Waiting for your response... thank you.

- hwjang.

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