Re: newbie: fb specs and indirect VRAM access

Thank you all for your replies!

Jaya, that's exactly my case: an ARM7, with no MMU. If possible - and very
briefly - could you so much as cite the other possibilities you envision
so I can research them?

Thanks in advance.

Cheers,

Jorge.

Geert Uytterhoeven escreveu:

On Thu, 21 Aug 2008, Jaya Kumar wrote:

quoted

On Thu, Aug 21, 2008 at 8:54 AM, Geert Uytterhoeven
[off-list ref] wrote:

quoted

On Thu, 21 Aug 2008, Jorge Marques Pelizzoni wrote:

quoted

Jorge Marques Pelizzoni escreveu:

quoted

I am considering implementing a frame buffer device for a mobile

platform

quoted

quoted

quoted

(LPC2400 on uCLinux) that, as far as I can tell, seems to lack

one.

quoted

Well,

quoted

quoted

linux/Documentation/fb/deferred_io.txt

One note about this. If you're using LPC2400, I think that's an ARM7.

TDMI so no MMU which I think matches your mention of uclinux.

quoted

Unfortunately, defio has a dependency on MMU. There are other
possibilities to achieve the same effect but I'm not familiar with the

2400 and I'm not sure if it can do it.

Oops, sorry, didn't notice that part. Yes, it depends on the presence of

a MMU.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 --
geert@linux-m68k.org

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

Jorge M. Pelizzoni
ICMC - Universidade de São Paulo

call me at http://www.jaxtr.com/jpeliz





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