Greg Troxel <gdt@ir.bbn.com> writes:
> There is a semi-related issue on Thinkpad 600Es, where the default 1G
> mapping loses and 512 is needed.  Besides using ACPI/etc. to really
> find out the situation (can one do that and then go back to APM?),

No.

> two thoughts come to mind:
>
>   a quirk table that takes perhaps discovered memory amount and a list
>   of pci devices etc. and provides an RBUS_MIN_START value.  I wonder
>   if a heuristic from processor type/speed would be good, since it
>   would estimate the age of the machine and thus what space is likeley
>   to be implemented and not used.
>
>   a way to try various values until one works.

I suspect there has to be a better way...

Perry