[U-Boot] flow of u-boot

[U-Boot] flow of u-boot

[ABIRAMA SUNDARI]

can any one know what is the actuall flow of u-boot (ie) execution sequence.
pls help me....

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[U-Boot] flow of u-boot

[Wolfgang Denk]

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
There are two kinds of people, those who do the work  and  those  who
take  the  credit.  Try  to  be  in  the  first  group; there is less
competition there.                                    - Indira Gandhi

[U-Boot] flow of u-boot

[ABIRAMA SUNDARI]

hi
 thanks for your answer. but i am getting you properly.pls tell me the
things in detail.....(what you meant by _start ).
pls help me ...bcaz i am a fresher for this field...





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
> There are two kinds of people, those who do the work  and  those  who
> take  the  credit.  Try  to  be  in  the  first  group; there is less
> competition there.                                    - Indira Gandhi
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
> 
> 

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[U-Boot] flow of u-boot

[Nishanth Menon]

ABIRAMA SUNDARI said the following on 02/19/2009 03:56 PM:
> thanks for your answer. but i am getting you properly.pls tell me the
> things in detail.....(what you meant by _start ).
>   
Step 1) Download u-boot code (you can download using git - try
google.com to get more help on git) by
git clone  git://git.denx.de/u-boot.git
Step 2) try 'grep -Rw _start .' (help of grep is available in 'man grep')

Regards,
Nishanth Menon

[U-Boot] flow of u-boot

[Jerry Van Baren]

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
>> There are two kinds of people, those who do the work  and  those  who
>> take  the  credit.  Try  to  be  in  the  first  group; there is less
>> competition there.                                    - Indira Gandhi
>> _______________________________________________
>> U-Boot mailing list
>> U-Boot at lists.denx.de
>> http://lists.denx.de/mailman/listinfo/u-boot
>>
>>
>