On Fri, 6 Sep 2002, Jun Sun wrote: > > And this is where I think the add_memory_region() magic might need to > > happen. Do I need to add the on-chip SRAM and control registers using > > add_memory_region()? > > I don't think you have to. I *think* it works if you don't. Not sure > know if you actuall do add. Well, you have to register usable RAM areas with add_memory_region(), if you want to make them available to Linux. Adding other ranges is optional but you have to consider a part of the kernel may want to know if the range is usable or occupied (consider e.g. the PCI setup code modifying BARs). It's also nice and sometimes useful to a user to let him see what space is occupied. What you register with add_memory_region() is printed upon boot and available from /proc/iomem. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
