Réf. : RE: mmap : please help !
Jean-Christophe Dubois
jdubois at mc.com
Thu Apr 14 20:09:56 EST 2005
Hello Sophie,
On Thu, 2005-04-14 at 11:38 +0200, scarayol at assystembrime.com wrote:
> Stéphane,
>
> thanks for your help.
> But I think that, except instruction eieio, I do similar things. You use
> the virtual address returned by mmap but have you the same values if you
> use write/read(axs_mem_fd,...) instead of in_8/out_8.
> That is my problem : I want to be sure that when I use the virtual address
> returned by mmap, I access really to the physical memory mapped area.
As the /dev/map_mc is your custom driver it should be fairly easy for
you to check the parameters you pass to remap_page_range().
> Do you know a shell command in order to dump the memory and verify what I
> do ?
try "od"
JC
> ----------------------------------------------------------
> Sophie CARAYOL
>
> TECHNOLOGIES & SYSTEMES
> 50 rue du Président Sadate
> F - 29337 QUIMPER CEDEX
>
> Tél: +33 2 98 10 30 06
> mailto:scarayol at assystembrime.com
> ----------------------------------------------------------
>
>
>
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded at ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
More information about the Linuxppc-embedded
mailing list