Boot from SD with modified RCW/PBI

[notshure]

Hello everyone,
I am working with the QorIQ LS1043A,
I would like to make a boot from SD with RCW and PBI set by me.
Since I need the processor to start up with a certain HW configuration (some COREs disabled, some peripherals disabled), I need to modify RCW.
How can I change the RCW and PBI to my liking and then insert them into the SD card?
I don't understand if on the SD card it is necessary to insert the value of the RCW, PBI and finally U-boot separately, or when I generate the boot I actually generate U-boot with RCW and PBI set by us incorporated inside?
Inside the memory card which of the two versions do I see?

SD card:                                                                                      SD card:
-RCW                                                                                          -U-boot (with modified RCW and PBI)
-PBI
-U-boot

[ufedor]

 > when I generate the boot I actually generate U-boot with RCW and PBI set by us incorporated inside

Correct.

Please refer to the Layerscape Software Development Kit User Guide, 4.3 How to build LSDK with Flexbuild:

"Flexbuild can separately build each component or automatically build all components, it generates the composite firmware (containing RCW, U-Boot/UEFI, PHY firmware, kernel image, dtb, initrd)"