Fwd: PPC beginner questions

Fwd: PPC beginner questions

[Wade Maxfield]

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  Thanks!  I'd already seen the #1 (#2) link in the FAQ and understood
that.  I'm not doing this from userland, so I was assuming it did not apply,
although I was going to use it to play with in user space.

  The #3 comes up as an error for me, the lists.linuxppc.org domain name
does not resolve.  Several other links in the FAQ do not resolve properly.
One now points to a page that has paid links to other pages.


thanks again,
Wade



On 8/21/06, Fillod Stephane <stephane.fillod@thomson.net> wrote:
>
>  Your question is a linuxppc-embedded FAQ. User-land access
>
> is documented in Denx's FAQ[1], and accessible through shorter URL[2].
>
> For more information, please follow this thread[3] (not ppc specific
> actually).
>
>
>
> [1]
> http://www.denx.de/twiki/bin/view/PPCEmbedded/DeviceDrivers#Section_AccessingPeripheralsFromUserSpace
>
> [2] http://tinyurl.com/6c7th
>
> [3] http://lists.linuxppc.org/linuxppc-embedded/200403/msg00059.html
>
>
>
> In kernel land, ioremap() is all you need.
>
>
>
> Don't forget to use the 'eieio' asm instruction if you want explicit I/O
> ordering.
>
>
>
> Regards,
>
> --
>
> Stephane
>
>
>
>
>  ------------------------------
>
> *Envoyé :* lundi 21 août 2006 15:51
> *Objet :* PPC beginner questions
>
>
>
>
>   I'm new to the PPC and I have a few questions.  I have written a  driver
> in the past for the X86 family, using i/o ports, but it was kernel 2.0 and
> i/o ports are not mmu handled.
>   I've been looking through the archive and I am slowly growing more
> confused.
>
>   We are using Xilinx with PPC built in.
>
>    The PPC has a memory management unit.  All of the IP we've added is
> mapped to physical addresses.
>
>    1. Can I access the memory the peripherasl are mapped to directly
> within the driver without going through functions?
>        if NOT, then Do I use
>           1. ioremap(),
>           2. request_mem_region(),
>           3. request_region()
>           4. something else?
>
>    2.  Are there any gotcha's with the ppc 405 that Xilinx uses that I
> should know about?
>
>
> thanks,
> wade
>
>
>

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