Re: [PATCH] ramoops appears geared to not support ARM

[Marco Stornelli]

Il 01/11/2011 00:03, Bryan Freed ha scritto:
> On Mon, Oct 31, 2011 at 1:57 AM, Marco Stornelli
> > > And I cannot shake the feeling that we have a fairly simple disconnect
> > > here.  Ramoops expects to use _device_ memory because it uses
> > > ioremap().  But the buffer itself is accessed through /dev/mem which
> > > (as we use it with no mmap() calls) expects to give access to _system_
> >
> > no mmap calls?! I don't understand how you are using /dev/mem.
>
> open(), lseek(), read().  No mmap is required for RAM, right?
> dd if=/dev/mem bs=1 count=1000 skip=32M

Mmmm, the operations done are different. Try: reserve the memory with 
memblock_reserve and read some data with this useful program 
http://free-electrons.com/pub/mirror/devmem2.c from the right location 
(the address used for ramoops).

Let me know.

Marco
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/