Andrew Johnson commented: 
https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1046#note_142596


@hongran86 How did you configure U-Boot on the MVME2500 to copy its environment 
to the MRAM?

IIRC there is no in-memory copy of the environment variable values while U-Boot 
is running, and U-Boot doesn't store them in the MRAM by default. I remember 
finding them in an i2c Flash EPROM when working with this board a few years 
back. If you added commands to move or copy them to the MRAM as part of the 
boot process that should be documented somewhere.

-- 
View it on GitLab: 
https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1046#note_142596
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