Hi,

In U-Boot I found some generic memory tests commands like mtest and POST tests. But I need to do complete DDR4 memory test with below algorithms: * Checkerboard Test * March C- Test * Neighborhood Pattern Sensitive Fault

Can I get any reference code for these algorithms in U-Boot ? Implementation for these algorithms available in any of U-Boot version ?

For Checkerboard algorithm, based on the explanation from below link (got by web search) I tried to implement https://www.design-reuse.com/articles/45915/memory-testing-self-repair-mecha... Attached the file: cmd_checkerboard.c Is the implementation I did is proper ? Can you verify once?

Similarly for March C- test based on explanation from these docs (got by web search) I tried to implement March C- test https://eecs.ceas.uc.edu/~jonewb/Memory.pdf http://www.ee.ncu.edu.tw/~jfli/memtest/lecture/ch03.pdf Attached the file: cmd_marchc_min.c Please can you verify once?

For Active Neighborhood Pattern Sensitive Fault test, still I didn't get the proper algorithms. Can you refer me the any link or source codes for this test?

Thanks and Regards, Devendra