[U-Boot] UBI and UBIFS on ARM64

[Oleksy, Adam (Nokia - PL/Wroclaw)]

Dear U-Boot community,
I'm developing software for Xilinx ZynqMP platform, which is made in 64-bit architecture. I would like to store every artifact needed to boot up on the UBIFS partition. I faced problem, that u-boot does not want to compile with enabled UBI/UBIFS support, due to lack of some atomic operations on longs. So, I've written them (see http://pastebin.com/ibp0Zt99). Please note, that I've written only that functions, which are needed by UBI/UBIFS. Then UBIFS started work on the target. Almost... because I've found that large files (~20MiB) can't be read. I've enabled debug messages, but I don't know how to interpret them (please see http://pastebin.com/gByDcdvw). Maybe you are able to help me?
I've also checked how the UBIFS behaves in the Linux, and the result is that everything works as expected. It means that I can write large files to UBIFS, and read them back successfully.  
Should you need any further information, please do not hesitate to contact me.

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 Best Regards,
 Adam Oleksy
  
 Nokia Solutions and Networks Sp. z o.o.