On Wed, 19 Dec 2001, Geert Uytterhoeven wrote: > OK, so I can check for < 16 MB in ioremap(), and readb() and friends will > handle it fine. You're not supposed to call ioremap() for real RAM anyway, so > there's no ambiguity. > > But what about request_mem_region() and friends? How can I distinguish between > ISA memory and the first 16 MB of RAM (or ROM, or whatever my board has there)? Well, as I stated in another mail (but in another thread, I think) you may try request_mem_region(virt_to_phys(ioremap(...))), especially as you really want to reserve an area in the CPU's physical address space and not in the bus's one. > Or am I not supposed to let those things show up in /proc/iomem? I think the appearance is not the point here. The point is to prevent a driver from accessing an already occupied area. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
