Dear Dimitar,

In message 1466257793.96923.1381071203850.JavaMail.apache@mail22.abv.bg you wrote:

My name is Dimitar Tomov. I'm student at Technical University of Sofia (Europe/Bulgaria).

Welcome.

I hope you are not disappointed when the first thing I do is asking you to stick to standard netiquette rules, like reducing your line length to some 70 characters or less. Also, reading [1] might help you to get help more efficiently.

[1] http://www.catb.org/~esr/faqs/smart-questions.html

0. Following "U-Boot Porting Guide" [Based on messages by Jerry Van

Baren in the U-Boot-Users mailing list, October 2002]: I'm sending this message as I'm really lost in the source code of U-boot and have no clear idea from where to start.

1. My goal is to port U-boot for LPC43xx board (LPC4357-EVB).

2. I made some research and found a port for the Hitex LPC4350 Eval

board from Emcraft, also found a port for another LPC43xx based system from Cyril Fougeray for Diwel ( https://bitbucket.org/fouge/u-boot-diwel ).

Unfortunately it appears that none of this code has ever been submitted upstream, i. e. none of this is present in the mainline U-Boot code. That means none of the developers here is likely to be able to help (only if he by chance might have been involved with any of these projects).

3. As I looked through the source code of mainstream U-boot I didn't

find Cortex-M4 cpu support, is this correct ?

Yes, this is correct, so far.

Thank You for Your time in advance. I will really appreciate any starting points or advices.

I guess you are basically on your own. Try to use the existing out-of-tree code as a starting point, rebase it against current mainline, then try to get it working on your hardware. If you then have specific questions, we may try to help.

Note that you will need full hardware documentation and most probably a JTAG debugger to make process efficiently.

Best regards,

Wolfgang Denk