Building root filesystem from scratch

Hi Raja,

1. The following link should help you building the OMAP-L138 software components, including the kernel.

http://processors.wiki.ti.com/index.php/GSG:_Building_Software_Components_for_OMAP-L1

2. The instructions at the link you mentioned should work for storing your kernel image and file system on SPI flash. I'm looking further into whether it strictly refers to initrd. Does your design require something different?

Are you considering any other options for storage of your kernel or file system?

Thanks,

Clinton 

Hi Clinton,

Apologize for the delay in replying.

Unfortunately, the Wiki page you are referring to does not have relevant instructions to build the root file system (like the Angstrom distribution). It has instructions to rebuild kernel/uboot if I am not mistaken.  I have been able to rebuild those successfully. But, I need to be able to rebuild the root file system from scratch.

Regarding flash, we do not need anything special. We are using SPI flash. When I booted with the prebuilt uboot for SPI, there were no available commands to create partitions (like the link I pointed out has for NAND based uboot). In the absence of such commands, I was asking how can I create partitions and program in the kernel/root file system at various addresses in flash and set the bootcmd appropriately to boot from SPI flash.

If you can provide me more details on the two above, I will appreciate it.

Cheers,

-raja.

Hi,

Here are some useful links to build a root file system:-

1: http://narcissus.angstrom-distribution.org/

2: http://embeddedlinuz.wordpress.com/2011/07/04/building-a-root-filesystem-with-buildroot/

3: http://www.tldp.org/HOWTO/Bootdisk-HOWTO/buildroot.html

Regards,

--Prabhakar Lad

http://in.linkedin.com/pub/prabhakar-lad/19/92b/955

Thank you Prabhakar for the links.

Was buildroot used to build the root file systems which is packaged with TI DVSDK? I was under the impression that it was built with OpenEmbedded.

Also, what is TI's recommendation for building root file system. As we have to make changes to what goes into the product, I need to build things from scratch. If there is a recommended TI approach, I would like to use the same infrastructure. If there is some other forum where I can get advice along those lines, can you please let me know?

Cheers,

-raja.

Hi,

Here is another link which should help you http://arago-project.org/wiki/index.php/Setting_Up_Build_Environment

I am not aware of it, may be a TI employee could help here out.

Regards,

--Prabhakar Lad

http://in.linkedin.com/pub/prabhakar-lad/19/92b/955

Hi Raja,

            Though we support Monta Vista File system ,as per the latest releases we recommend and use the arago based (Open Embedded) filesystem for OMAP-L1x.

            You can follow the link(http://arago-project.org/wiki/index.php/Setting_Up_Build_Environment) Prabhakar has specified in the earlier post to build your filesystem from scratch.

Regards,

Iyshwarya

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Thank you very much Prabhakar and Iyshwarya. I will read through that page and build from there.

Also, Prabhakar, I did not realize that you were not from TI when I asked you TI specific question:-) Thank you so much for jumping and helping me out.

Cheers,

-raja.