[U-Boot] SPL support and secondary image size

[jonsmirl at gmail.com]

On Thu, Nov 3, 2011 at 10:11 PM, Aneesh V <aneesh at ti.com> wrote:
> Hi Jon,
>
> On Friday 04 November 2011 04:30 AM, Scott Wood wrote:
>>
>> On 11/03/2011 05:20 PM, jonsmirl at gmail.com wrote:
>
> Looks like I am not seeing some mails in this thread. I didn't get your
> first mail, neither Tom Rini's mails.
>
>>> My primary SPL image needs the size of the secondary image built into
>>> it. How do I access that size while building the primary SPL image?
>
> For OMAP we find this run-time by loading u-boot.img instead of
> u-boot.bin. u-boot.img has a 64 byte header with all necessary
> information such as size, load address, image type etc. The OMAP SPL
> can in fact load any image that has a standard u-boot header(mkimage
> header), including a uImage. This scheme was suggested by Wolfgang.

I was starting to think along those lines too. I could have the SPL
boot straight to Linux when booting from NAND. Then if I use a DFU USB
stick have it boot to full u-boot.  It could be modified to give some
options on the touch screen to rewrite the NAND since there is no
keyboard.




>
>>
>> Does it need to be exact?  Usually we just hardcode something that
>> should be big enough.
>>
>> -Scott
>>
>> _______________________________________________
>> U-Boot mailing list
>> U-Boot at lists.denx.de
>> http://lists.denx.de/mailman/listinfo/u-boot
>
>



-- 
Jon Smirl
jonsmirl at gmail.com