On Friday 16 May 2008, 甜瓜 wrote:
I know it is a newbie question. Any hint from you are welcome.In default, u-boot 1.1.5, "make walut_config && make all" will generate a 256KB bin. The last 4 bytes of the bin is a jump instruction to the entry point of u-boot.Is that right?
Yes, this is correct.
But my ppc405GP walnut board has 512KB flash for holding u-boot.
All Walnut boards have 512k of NOR FLASH. Do you really have an original IBM/AMCC Walnut or a different custom 405GP board?
I wonder how to build a 512KB bin?
Generally this is possible. You need to change CONFIG_MONITOR_LEN & CFG_MONITOR_BASE in include/configs/walnut.h. And TEXT_BASE in board/amcc/walnut/config.mk.
Is there any OPTION/SETTING targeting this problem? Anything else I should take care?
But please don't forget that the environment is also stored in the NOR FLASH. And by changing the U-Boot size to 512k you leave no space for the environment.
So why exactly do you want to change the U-Boot image size?
Best regards, Stefan
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