[coreboot] Rev 4099+ Broken Tree?

[Rudolf Marek]

Here is output from MCE log, for that one in ML


marekr2 at queeg:~$ echo CPU 0: Machine Check Exception:                4 Bank 4: 
fe28a001fd080813 TSC 2eefd49369 ADDR f0050 MISC c0090e7e00000000 | 
/usr/sbin/mcelog  --ascii --k8
mcelog: Cannot open /dev/mem for DMI decoding: Permission denied
HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 0 4 northbridge   Northbridge RAM Chipkill ECC error
   Chipkill ECC syndrome = fd51
        bit32 = err cpu0
        bit45 = uncorrected ecc error
        bit57 = processor context corrupt
        bit59 = misc error valid
        bit61 = error uncorrected
        bit62 = error overflow (multiple errors)
   bus error 'local node origin, request didn't time out
       generic read mem transaction
       memory access, level generic'
STATUS fe28a001fd080813 MCGSTATUS 4


And from Ward:
CPU 0 4 northbridge   Northbridge RAM Chipkill ECC error
   Chipkill ECC syndrome = fd51
        bit32 = err cpu0
        bit45 = uncorrected ecc error
        bit57 = processor context corrupt
        bit59 = misc error valid
        bit61 = error uncorrected
        bit62 = error overflow (multiple errors)
   bus error 'local node origin, request didn't time out
       generic read mem transaction
       memory access, level generic'
STATUS fe28a001fd080813 MCGSTATUS 4

Seems something went wrong with ECC. Maybe because the memory is not cleared 
anymore?

Can someone test if 
http://tracker.coreboot.org/trac/coreboot/changeset/4099/trunk/coreboot-v2/src/cpu/amd/car/clear_init_ram.c

this change is reverted problem goes away?

Rudolf