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 +
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