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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: barebox@lists.infradead.org
Subject: Re: *** PROBABLY SPAM *** [PATCH 06/12] reimplement uImage code
Date: Thu, 15 Dec 2011 17:39:07 +0100	[thread overview]
Message-ID: <20111215163907.GW27267@pengutronix.de> (raw)
In-Reply-To: <20111215162013.GI9234@game.jcrosoft.org>

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@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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  reply	other threads:[~2011-12-15 16:39 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-15 10:30 reimplement bootm support Sascha Hauer
2011-12-15 10:30 ` [PATCH 01/12] oftree: add of_fix_tree() Sascha Hauer
2011-12-18 13:07   ` *** PROBABLY SPAM *** " Jean-Christophe PLAGNIOL-VILLARD
2011-12-19 10:31     ` Sascha Hauer
2011-12-20 14:03       ` Jean-Christophe PLAGNIOL-VILLARD
2011-12-23 17:14         ` Sascha Hauer
2011-12-25  6:09           ` Jean-Christophe PLAGNIOL-VILLARD
2012-01-02 11:49             ` Sascha Hauer
2011-12-15 10:30 ` [PATCH 02/12] filetype: Add oftree detection Sascha Hauer
2011-12-15 10:30 ` [PATCH 03/12] uncompress: implement uncompress_fd_to_buf Sascha Hauer
2011-12-15 10:30 ` [PATCH 04/12] libbb: add read_full/write_full functions Sascha Hauer
2011-12-15 10:30 ` [PATCH 05/12] ARM: call start_linux directly with initrd start/size and oftree Sascha Hauer
2011-12-15 10:30 ` [PATCH 06/12] reimplement uImage code Sascha Hauer
2011-12-15 13:33   ` *** PROBABLY SPAM *** " Jean-Christophe PLAGNIOL-VILLARD
2011-12-15 15:27     ` Sascha Hauer
2011-12-15 16:20       ` Jean-Christophe PLAGNIOL-VILLARD
2011-12-15 16:39         ` Sascha Hauer [this message]
2011-12-15 10:30 ` [PATCH 07/12] bootm: use new uimage code Sascha Hauer
2011-12-15 10:30 ` [PATCH 08/12] add uimage command Sascha Hauer
2011-12-15 10:30 ` [PATCH 09/12] remove now obsolete iminfo command Sascha Hauer
2011-12-15 10:30 ` [PATCH 10/12] remove now unused uImage code Sascha Hauer
2011-12-15 10:30 ` [PATCH 11/12] move code now only used in mkimage to mkimage Sascha Hauer
2011-12-15 10:30 ` [PATCH 12/12] defaultenv: simplify boot Sascha Hauer
2011-12-15 13:37 ` *** PROBABLY SPAM *** reimplement bootm support Jean-Christophe PLAGNIOL-VILLARD
2011-12-15 14:47   ` Sascha Hauer

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