In message Sea2-F43BgUp5G9C1op000654e8@hotmail.com you wrote:
Is there a standard of the interface between u-boot and linux image? Since
Yes, U-Boot uses the interfaces defined by the Linux kernel.
the u-boot should passing some information to kernel at the begining of linux image start up, but for different CPU type, the bdinfo structures are very different in u-boot, how does these structures co-work with linux
At the moment, each architecture has it's own way of passing information to the kernel. But this is something we inherited from Linux history, it is not imposed by U-Boot. U-Boot just uses what's there resp. what's been there in the Linux kernel.
image made from different version of embedded linux such as eldk, hardhat or others? thanks.
These are just different distributions which are all based on the same Linux kernel source trees. There is no difference in the interfaces. Nor any significant differnce at all.
Viele Grüße,
Wolfgang Denk