Re: [RFC] New target 'cuImage' - compatibility uImage

["Li Yang" <LeoLi@freescale.com>]

On 8/4/06, Matthew McClintock <msm@freescale.com> wrote:
> On Fri, 2006-08-04 at 00:17 +0800, Li Yang wrote:
> >
> > Though it will need more space, the increase won't be too much as
> > wrapper and FDT should be very small.  The benefit is that kernel can
> > be extract directly to it's destination(address 0), rather than
> > extract to another place and then move it there.  A classical
> > time/space tradeoff.
> >
>
> I'm not sure that is correct. Let me walk through the steps to verify.
>
> 1) Load cuImage at a load address
> 2) Extract zImage at an address and begin execution
> 3) Copy kernel to load address and fixup DTB, etc.
> 4) Start kernel execution
>
> versus...
>
> 1) Load cuImage at a load address
> 2) Copy zImage to an address and begin execution

Don't know if it's possible to by-pass this by setting in u-boot
header.  If not, please ignore my suggestion.

- Leo
> 3) Extract kernel to load address and fixup DTB, etc.
> 4) Start kernel execution
>
> There will always be that extra copy in there vs. just running the
> zImage itself. This is to maintain compatibility with older u-boots,
> which is the main point of this target.
>
> Am I missing something here?
>
> -Matthew
>
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