[coreboot-gerrit] Change in coreboot[master]: nb/intel/sandybridge/raminit: Add ECC debug code

[Patrick Rudolph (Code Review)]

Hello build bot (Jenkins), Paul Menzel, Angel Pons, Patrick Rudolph,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/40946

to look at the new patch set (#4).

Change subject: nb/intel/sandybridge/raminit: Add ECC debug code
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nb/intel/sandybridge/raminit: Add ECC debug code

* Add ECC test code when DEBUG_RAM_SETUP is enabled
* Move ECC scrubbing after set_scrambling_seed() to be able to observe
  what has been cleared in the test routine. If clearing happens
  before set_scrambling_seed the data is XORed with a different PRN.
  Data read from memory will look random instead of all zeros.
* ECC scrubbing must happen after dram_dimm_set_mapping()
  The ECC logic is set to "normal mode" in dram_dimm_set_mapping(). In
  normal mode the ECC bits are calculated and stored on write
  transactions.
* Move method out of try_init_dram_ddr3().
  This satisfies point 2 and point 3 of the list above.

Change-Id: I76174ec962c9b0bb72852897586eb95d896d301e
Signed-off-by: Patrick Rudolph 
---
M src/northbridge/intel/sandybridge/raminit.c
M src/northbridge/intel/sandybridge/raminit_native.c
2 files changed, 31 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/46/40946/4