[RFC] [PATCH V2] Adding DTB to architecture independent vmlinux
David Gibson
david at gibson.dropbear.id.au
Fri Oct 29 15:04:56 EST 2010
On Thu, Oct 28, 2010 at 02:44:47PM -0700, H. Peter Anvin wrote:
> On 10/28/2010 10:32 AM, David VomLehn wrote:
> >
> > In my case, where there are a lot of up-front reservations of memory
> > at a static address, there is a fair amount of work to do before
> > it's possible to do the dynamic address allocation for the blob's
> > ultimate destination, but I'm okay with either doing blob size and address
> > rounding or copying it from init. I don't see a benefit of supporting
> > multiple approaches for Linux.
> >
>
> The reason I mentioned dynamic allocation is that you still need to do
> dynamic allocation if you're using a blob from an external source. If
> you don't end up with pointers *into* the blob, though, then you don't
> need to do the relocation until some time before you jettison the init
> section.
The way the dtb format is designed, you should almost never work with
pointers into the the middle of the blob.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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