Richard Smith wrote:
assignments, it would be necessary to fix this. If this can not be
addressed by memory mapping, you could use, or emulate, a PCI bridge.
Did you find additional issues that I have not considered?
In Linuxbios we get a lot of requests for support of newer Intel chipsets.
The problem is that Intel will not release all the right docs for
things like properly turning on the RAM. LANL labs has asked Intel a
few times and the response is that they just aren't interested in
having Linuxbios work with thier newer chipsets.
So even though you have been able to look at the chipset docs I'm very
doubtful that you would ever be able to actually release this GPL
using an Intel chipset.
Have you read this document:
http://intel.com/design/chipsets/datashts/307502.htm
This is not very detailed and it does appear more complicated because
the DRAM controller is a PCI device and it appears that it is also
somewhat less straightforward than separate DRAM controllers.
However, I believe that all the information is there and that someone
that has a clear understanding of PCI (which I do not) and of DRAM
controllers should be able to figure it out. Yes, it would be nice if
there were a programmer's guide and/or some application notes, but the
documentation is complete.
There is also the second part of the memory setup problem. You must get
the information about the memory chips by reading it from them. This is
another issue which I do not have a detailed understanding of.
Have you looked to see if there is a book on the subject of chip sets?
AMD chips however _do_ have the necessary docs available. So you
might actually be able to make something with an AMD northbridge.
I will look and see what additional information they provide.
--
JRT
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