[U-Boot-Users] Newbie in U-Boot, Some Queries

[U-Boot-Users] Newbie in U-Boot, Some Queries

[raajesh.n at indiatimes.com]

HI ,

I am newbie to U-Boot, I have a customized  board with u-boot with it, I have seen through top level makefile of  U-Boot.Below stated is what I have observed from makefile.

 1. First initialization of processor (ARM922t in my case) is done in CPU folder with Startup.S where this assembly routine will call low_level_init code for initialization of RAM of customized board.

 2. Further I have observed rest all code which are required for boot-up is made as library and compiled at once.

 I would like to know how the code flow of U-Boot takes place , which are all the files which will be called in sequence while boot operation takes place, as far I have seen the code, Startup.S is one which starts first clearing Stack & PC which will further calls low_level_Init, I am unable to know how U-Boot works further from this place.

I would request U-Boot users to share there knowledge in explaining me how the code flow of U-Boot takes place, which will help me in finishing my project where RAM & Flash is changed.


Best Regards,
Rajesh

[U-Boot-Users] Newbie in U-Boot, Some Queries

[Frank]

--- raajesh.n at indiatimes.com wrote:

> 
> HI ,
> 
> I am newbie to U-Boot, I have a customized  board with u-boot
> with it, I have seen through top level makefile of 
> U-Boot.Below stated is what I have observed from makefile.
> 
>  1. First initialization of processor (ARM922t in my case) is
> done in CPU folder with Startup.S where this assembly routine
> will call low_level_init code for initialization of RAM of
> customized board.
> 
>  2. Further I have observed rest all code which are required
> for boot-up is made as library and compiled at once.
> 
>  I would like to know how the code flow of U-Boot takes place
> , which are all the files which will be called in sequence
> while boot operation takes place, as far I have seen the code,
> Startup.S is one which starts first clearing Stack & PC which
> will further calls low_level_Init, I am unable to know how
> U-Boot works further from this place.
> 
> I would request U-Boot users to share there knowledge in
> explaining me how the code flow of U-Boot takes place, which
> will help me in finishing my project where RAM & Flash is
> changed.
> 
> 
> Best Regards,
> Rajesh
> 
cscope is your friend...


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ