Oh I though this was something new, but I already had that "decrypted" code. It still is unreadable, we need to open it in some kind of program. I know what assembler looks like and have done some easy things with it. Fullstop.
About SDRAM_image.bin:
This file has been packed as a ROM filesystem, which is typical for emedded systems. Unfortunately it's not a Linux ROM-FS and the M6 kernel is not Linux. That means we should try the μC/OS-II tools (mentioned on MeizuM6Port < Main < TWiki) to unpack it.