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Re: Redboot Image Download Design Question.
- From: Benny Chen <bennyc at rtunet dot com>
- To: ecos-discuss at sources dot redhat dot com
- Date: 20 Jul 2005 08:01:25 +1000
- Subject: Re: [ECOS] Redboot Image Download Design Question.
- References: <1121665613.31422.5930.camel@Vigor4>
After some prototyping I have managed to add a new component command to
Redboot which executes a program that reads a config file (in Battery
Backed SRAM for now) and executes command to load images from the
appropriate server. It seems that method 1 is quite straight forward.
However, as I haven't got JFFS2 support I can't really test the rest of
the JFFS2 related stuff.
Will post on the list once I have tested the complete solution out.
Cheers,
Benny
On Mon, 2005-07-18 at 15:46, Benny Chen wrote:
> Hi there,
> I am trying to achieve the ability for our application to define what
> image and on which server Redboot is going to download the image from.
>
> 1).
> What I have in mind was a simple config file that specifies the load
> information that will be created by my application and store in the
> JFFS2 partition.
>
> Then I will add a custom command in Redboot say 'exec_cust_config' to
> -mount the jffs2,
> -exit if no config file else
> -read and parse this file
> -load the images from the specified location and server.
> -Delete the old ramdisk and zImage from flash
> -burn the new images into flash
> -remove the config file
> -umount the jffs2 partition.
>
> This 'exec_cust_config' command will be added to the boot script. E.g.
> >>exec_cust_config
> >>fis load ramdisk
> .
> .
> >>exec -r 0x800000
>
>
> 2).
> The other option is to have the ramdisk.gz and zImage download by the
> application and stored in another JFFS2 partition and have redboot mount
> that partition and download the image into ram and execute it.
>
> Does this way require a lot more runtime memory due to mounting the
> additional JFFS2 partition?
>
>
> I am not sure if which of the above possible solutions is the right way
> of doing what I am trying to do or even if they will work. Could anyone
> help?
>
> Regards,
> Benny
>
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