*** PROBABLY SPAM *** [PATCH 06/12] reimplement uImage code

[Sascha Hauer]

On Thu, Dec 15, 2011 at 05:20:13PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 16:27 Thu 15 Dec     , Sascha Hauer wrote:
> > On Thu, Dec 15, 2011 at 02:33:17PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > On 11:30 Thu 15 Dec     , Sascha Hauer wrote:
> > > > Provide a new API for accessing uImages which makes it easy
> > > > for commands to open images, verify them, load to (free) sdram
> > > > regions and show information about uImages.
> > > > 
> > > > - We now do not load the image to malloced space anymore.
> > > > - The data in the header is now stored in cpu native endianess
> > > >   after uimage_open which makes it easy to access the header data.
> > > > - uImage can be loaded to dynamically allocated sdram regions.
> > > > 
> > > > Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> > > I was more think of a filesystem
> > > 
> > > so we can execute an embedded script
> > 
> > You can still do with "uimage -e script myimage; ./script"
> > 
> > I thought about the filesystem approach and I came to the conclusion
> > that this is not really what we want for booting. While it definitely
> > has charm when we can mount a uImage and just work on the included file
> > we would loose the meta data in this case. We could create the metadata
> > in form of files, maybe like this:
> > 
> > # mount uImage uimage /mnt
> > # ls /mnt
> > /mnt/image0
> > /mnt/image1
> > /mnt/entrypoint
> > /mnt/loadaddress
> > 
> > But these files would be hard to work on and also would not have
> > the 'uImage is just another image handled by bootm' facility.
> I get a first patch that do this but not finished
> 
> no my idea why a new falicity as all the image could be mouted in my mind
> 
> and maybe use an ioctl to get the metadata

We could add this later if it turns out to be useful.

> 
> and we could map it

This only helps on devices which we can physically map into memory. NOR
flash seems to become more the exception than the rule.

Sascha

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