Reviving bricked device

[Łukasz Wójcik]

Hi there,


Good day to you guys in new year. I am seeking advice on 'reviving' 
bricked device. I have recently bricked my customer's device that is 
running their own version of Uboot. Something went wrong during update. 
I already have a working version of a binary. Uboot lies in NOR flash 
chip, and the layout is as follows:

uboot        0x00000000 - 0x000dffff (size 0x000e0000, 896KB)
shmoo        0x000e0000 - 0x000effff (size 0x00010000, 64KB)
uboot-env    0x000f0000 - 0x000fffff (size 0x00010000, 64KB)


I'm not an Uboot expert, but I think 'u-boot.bin' contains environment 
variables as well (or so it seems scanning it using 'strings'). How 
should I program the chip so that it layout after the programming 
conforms to the above memory map ?


Programming the 'executable' seems easy enough, I just put it at the 
address 0x0, but how do I program environment variables at 0xf0000 ? Or 
is this portion only for new environment variables ?


I would appreciate any sort of clues and suggestions,


Best regards,

-ŁW