OMAP-L138: NOR Flash secondary bootloader

Hi Gonzalo,

The Processor-SDK Developer's Guide has a section regarding SBL: https://software-dl.ti.com/processor-sdk-rtos/esd/docs/06_03_00_106/rtos/index_Foundational_Components.html#omapl137-omapl138-c6748. 

You can find more information about the conversion tool. However, for OMAP-L138, the Processor-SDK only supports MMCSD SBL.

Regards,

Jianzhong

Hi,

thank you Jianzhong for your reply. I came across with that information on the SDK documentation but as it only support MMCSD SBL I didn't follow that reference.

I guess there must be some application notes or at least some manual where I could understand the details of the SBL functions and how to deal with the RPRC and multi core files formats that the SBL must parse from the non volatile memory as well as the tools to create the image to be flashed into the external memory.

The module bl_copy_rprc from the Starteerware SBL seem to recognize the number of sections to be copied automaticaly form the RPRC header (Unfortunately only for NAND flash).

I have already seen the OMAP-L138_FlashAndBootUtils_2_40 that give me some hope, but it just seems to implement a User Boot Loader (UBL) that copies only ony application image and not recognizing a multi core image. I will keep studing this package.

Gonzalo.

Gonzalo,

Did you mean OMAP-L138 Starterware from here? We don't support this SW package anymore. 

The development board for OMAP-L138, OMAP L138 LCDK, only supports NAND and DDR2 memory interfaces. So the Starterware only supported NAND SBL.

Regards,

Jianzhong

Hi,

well I realized that TI do not support any more that package by the years it has not be updated.

That is the reason I am looking for references, application notes, guides and on the like to try to create or adapt some of the existing packages that do not support NOR flash and include that boot option for a secondary bootloader.

Ideally, I wish I could understand well all the detailed steps the a secondary bootloader must do to set up the C environment for both OMAP-L138 cores: ARM and DSP. This way I could analyze well the existing bootloaders and do my adaptation.

Best regards,

Gonzalo.

Hi Gonzalo,

Understood your situation. Maybe you can try to look at SBLs for other TI devices which have NOR flash and see if you can get any reference?

Regards,

Jianzhong

Hello,

I had to put aside this issue for a while.

I wonder if someone has a suggestion of a TI DSP or MCU nearly compatible with OMAP-L138 device having a SBL project managing a NOR flash memory as the boot source of code. 

Otherwise, as I mentioned, a good reference about the booloading process steps and file formats needed for the OMAP-L138 will be much welcomed.

Regards,

Gonzalo