Andrew Johnson commented on a discussion: 
https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1046#note_143436


IIRC the U-boot environment values are stored on a Flash device, not in main 
memory or on the boot flash, but I forget whether it was on an I2C bus or 
somewhere else. When I was working on our VxWorks BSP for the MVME2500 I 
remember reading that out and seeing the variable names and values. I think it 
held a checksum of some kind at the beginning, maybe in the first 2 bytes.

-- 
View it on GitLab: 
https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1046#note_143436
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