mainboard/kgpe-d16|kcma-d8: Update memory test to include second PRNG stage

The existing memory test routine was insufficient to detect certain types
of bus instability related to multiple incompatible RDIMMs on one channel.

Add a PRNG second stage test to the memory test routine.  This second stage
test reliably detects faults in memory setup for RDIMM configurations that
also fail under the proprietary BIOS.

Change-Id: I44721447ce4c2b728d4a8f328ad1a3eb8f324d3d
Signed-off-by: Timothy Pearson <>
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <>
Reviewed-by: Martin Roth <>
2 files changed