[U-Boot] flow of u-boot

Jerry Van Baren
2009-02-19T14:18:28Z

ABIRAMA SUNDARI wrote:
> hi
> thanks for your answer. but i am getting you properly.pls tell me the
> things in detail.....(what you meant by _start ).

_start is a label in the source code. You need to understand what
happens when you release your processor from reset: how and where it
starts executing code. In terms of u-boot software, the processor will
start executing at the _start label (note that u-boot supports many
different processors, all different in how they start running).

In terms of detail, the detail _is_ the source code and having us retype
it in email isn't useful.

> pls help me ...bcaz i am a fresher for this field...

You will have to read u-boot source and your processor's Reference
Manual, learn, and through that achieve understanding. It is a zen
thing. There is no magic shortcut to the zen of understanding. Sorry.

Best regards,
gvb

> wd wrote:
>> Dear ABIRAMA SUNDARI,
>>
>> In message <22100519.post@talk.nabble.com> you wrote:
>>> can any one know what is the actuall flow of u-boot (ie) execution
>>> sequence.
>>> pls help me....
>> It starts at the reset entry point, i. e. _start, and then follows the
>> branches...
>>
>> Best regards,
>>
>> Wolfgang Denk
>>
>> --
>> DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
>> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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>>
>