[LinuxBIOS] raminit.c

joe at smittys.pointclark.net joe at smittys.pointclark.net
Thu Mar 22 01:01:52 CET 2007

Quoting Stefan Reinauer <stepan at coresystems.de>:

> * joe at smittys.pointclark.net <joe at smittys.pointclark.net> [070322 00:48]:
>> a) setup the most minimal northbridge memory registry
>> b) detect spd to find memory parimeters
>> c) set the spd parimeters in the northbridge memory registry
>> d) startup memory
>> Is this correct??
> a) sounds suspicious. No "minimal" setup, but rather "those registers of
>    the memory controller that don't have to be setup via c.
>> The main question I have is how do I know which of the northbridge
>> memory registers need to be setup on initially?? If they are to use
>> their default values to I even need to include them?? Or should I just
>> set them all up??
> Heh. :-) That is the tricky part. You have to read the docs, and try to
> understand, and you can compare the registers to those of the legacy
> bios.
> Some chipsets have a "bios porting guide", but except for AMD chipsets,
> they are usually hard to get.
> Stefan

Ok, that makes sense. I was able to get the all of the memory register  
settings via the legacy bios. So should I just set the ones that are  
not the default values? Also, is there a "bios porting guide" for  
intel chipsets??

Thanks again - Joe
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