RAM test Uboot

[Fariya F]

Hi,

I would like to perform a RAM test at the bootloader level. My board is a
beaglebone board.  The problem is that my beaglebone board isn't booting
successfully. The kernel is crashing with "Unable to handle kernel paging
request at virtual address" I suspect it could be something to do with
RAM/MMU and hence would want to perform a RAM test.

Could someone help me with commands via which I can write to memory
locations starting from xx to yy and read back and see if the content
matches with what I wrote. The intent is to save these commands by
'saveenv' and execute it using the 'run' command on the bootloader prompt.
FYI, my bootloader version read from the source code Makefile is (Version:
2016, Patch 03). [I tried just the bare command mtest and it takes forever
to complete - not sure why so I thought I would do a memory write and
memory read and compare and determine if everything is OK with the RAM or
not]

#2: In addition when I check the eMMC partition map using mmc commands on
the bootloader prompt - everything looks ok. Is it possible to determine if
some corruption happened to the eMMC due to which the kernel wouldn't boot?

Regards,
FF