[LinuxBIOS] question about via chipset v-link and ram init
aaron.lwe at gmail.com
Mon Dec 10 06:40:25 CET 2007
On Dec 10, 2007 10:19 AM, Corey Osgood <corey.osgood at gmail.com> wrote:
> aaron lwe wrote:
> > Dear all,
> > the via v-link bus is for data communication between northbridge and
> > sourthbridge,
> > if I just want to make dram work, do I need to configure the v-link bus?
> > thanks.
> No, vlink can be handled before or after ram init, and it isn't even
> necessary, if no config is done it will default to the slowest operating
> mode (newer chipsets may bootstrap to higher modes, depending on
> motherboard design). However, you do have to program the CPU bus
> registers and all the various dram config registers before ram init.
> Getting these settings right may be a real pain, depending on what
> chipset you're dealing with.
Thanks Corey. I've been trying to make cn700 work, until now without luck.
I've programmed host bus and some dram controller registers, but not all.
how can I know which registers should be programmed and which needn't?
can you give me some advices? thanks.
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