[coreboot] Porting to RS780/SB700 board

Myles Watson mylesgw at gmail.com
Tue May 4 16:53:43 CEST 2010

>> I think there must be some MTRR setup problem.  Maybe you could print out
>> the MTRRs just before the slow parts?
> Here's a dump of various MSRs right after the call to raminit_amdmct()
> in romstage.c:

> /* fixed MTRRs */
> msr 00000250=1e1e1e1e1e1e1e1e
> msr 00000258=1e1e1e1e1e1e1e1e
> msr 00000259=0000000000000000
> msr 00000268=1e1e1e1e00000000
> msr 00000269=1e1e1e1e1e1e1e1e
> msr 0000026a=0000000000000000
> msr 0000026b=0000000000000000
> msr 0000026c=0404040404040404
> msr 0000026d=0404040404040404
> msr 0000026e=0404040404040404
> msr 0000026f=0404040404040404

I don't understand these values.  I would have expected
msr 00000268=1e1e1e1e1e1e1e1e (0xc0000-c7fff) (only if CAR size = 64K)
msr 00000269=1e1e1e1e1e1e1e1e (0xc8000-cffff)

Why are we setting anything in the 0-0x80000 range ( msr 0x250) or the
0x80000-0x9ffff range (msr 0x258)?
Same question for 0xe0000-0xfffff (0x26d-26f).


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