linux-apus-devel

Amiga Memory Map

[<fh...@at...>]

Can someone explain to me how APUS is using memory
in relation to a driver?  If I request a region, 
check_region()/request_region(), for I/O where
will the kernel most likely map that memory.  

Also on the APUS Amiga how to a get memory to be non 
cachable?

I may have asked these questions before.  If so....sorry.

Fred

Re: Amiga Memory Map

[Geert U. <ge...@li...>]

On Wed, 20 Sep 2000 fh...@at... wrote:
> Can someone explain to me how APUS is using memory
> in relation to a driver?  If I request a region, 
> check_region()/request_region(), for I/O where
> will the kernel most likely map that memory.  

The *_region() functions only _reserve_ regions, they don't map it.

{request,release}_region() is meant for I/O space, which the Amiga doesn't
have.
{request,release}_mem_region() is meant for memory space, which is what you
have on Amiga.

Before you can access memory space, you have to ioremap() the region.

> Also on the APUS Amiga how to a get memory to be non 
> cachable?

ioremap() does this by default.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds