[U-Boot] Need answers of basic questions regarding u-boot

Rakesh Modi
2011-08-07T18:55:35Z

Hi,
I am new to linux and u-boot. Please answer my following questions.
1) what is u-boot? why it require?
2) why we can not load linux kernel directly without use of u-boot?
3) How does any processor sequence starts when power is on?

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Thanks & Regards
Rakesh Modi