Hi all,
I ported the Geode LX Cache As Ram code to GX2.
It works nice and it reduces the boot time with ~35 seconds.
Though there is a piece of code i would like some more information on.
It is in /src/northbridge/amd/lx/raminit.c :
/* SWAPSiF for PBZ 4112 (Errata 34) */
/* check for failed DLL settings now that we have done a memory write. */
msrnum = GLCP_DELAY_CONTROLS;
msr = rdmsr(msrnum);
if ((msr.lo & 0x7FF) == 0x104) {
/* If you had it you would need to clear out the fail boot count flag */
/* (depending on where it counts from etc). */
/* The reset we are about to perform clears the PM_SSC register in the */
/* 5536 so will need to store the S3 resume flag in NVRAM otherwise */
/* it would do a normal boot */
/* Reset the system */
msrnum = MDD_SOFT_RESET;
msr = rdmsr(msrnum);
msr.lo |= 1;
wrmsr(msrnum, msr);
I omitted this routine in my patch because i could not find a description
about PBZ 4112 (Errata 34) and according to the LX databook the tested bit 8
is "Reserved".
My questions are:
1. Where could i find information on "Errata 34" ?
2.Would a similar test be needed/desired for GX2 ?
Thanks,Nils.
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