setting max memory to use on Alpha?

[Andrew Gallatin]

Wilko Bulte writes:
 > Folks,
 > 
 > Shouldn't we set a default to the max phys memory 
 > FreeBSD can use? Using hw.physmem in the loader I mean.

It should be done based on the rpb systype in machdep.c

 > Given that the maximum amount of mem that can safely be
 > used on all system models appears to be 1G.
 > 
 > BTW: my AS4100 is now running with 2G without incidents.
 > Which is a bit strange as I understood from Drew (tnx btw!)
 > that only Tsunami boxes can run with 2G and everything else
 > is limited to 1G? 
 > 

I mis-spoke.  I just looked at the mcpcia.c code, and its
got a 2GB direct map window as well.  So it should be happy.

Also, the UP1000/UP1100/UP1500 irongate machines should be good for as
much as 4GB of ram, but you can't squeeze that much into the box.

Drew