Re: [PATCH v7 2/2] arm64: boot: Support Flat Image Tree

[Tom Rini <trini@konsulko.com>]

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On Wed, Nov 29, 2023 at 07:59:00PM +0100, Ahmad Fatoum wrote:
> Hi,
> 
> a few more comments after decompiling the FIT image:
> 
> On 29.11.23 18:21, Simon Glass wrote:
> > +    with fsw.add_node('kernel'):
> > +        fsw.property_string('description', args.name)
> > +        fsw.property_string('type', 'kernel_noload')
> 
> The specification only says no loading done, but doesn't explain what it
> means for a bootloader to _not_ load an image. Looking into the U-Boot commit
> b9b50e89d317 ("image: Implement IH_TYPE_KERNEL_NOLOAD") that introduces this,
> apparently no loading means ignoring load and entry address?
> 
> I presume missing load and entry is something older U-Boot versions
> were unhappy about? Please let me know if the semantics are as I understood,
> so I can prepare a barebox patch supporting it.

So the matching side for this series in U-Boot is:
https://patchwork.ozlabs.org/project/uboot/list/?series=382849&state=*

And in short, for IH_TYPE_KERNEL_NOLOAD we do our best to use it
in-place. For decompression we allocate some space to decompress to.

-- 
Tom

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