[U-Boot] Help with Glomation GESBC-9G20

[Larry Baker]

On Jun 25, 2013, at 6:08 PM, Bo Shen wrote:

> Hi Larry Baker,
> 
> On 06/26/2013 02:02 AM, Larry Baker wrote:
>> On 24 Jun 2013, at 1:22 AM, Bo Shen wrote:
>> 
>>> Hi Larry Baker,
>>> 
>>> On 6/24/2013 16:02, Larry Baker wrote:
>>>> I have found why the latest U-Boot does not work on my Glomation
>>>> GESBC-9G20 board.  Two causes: a bad code text segment address
>>>> (prevents U-Boot from executing) and bad flash partition offsets
>>>> (prevents U-Boot from reading its environment variables).  The latter
>>>> I assume is common, as the flash partition layout can vary.  The
>>>> former has to do with where the primary boot loader expects to find
>>>> U-Boot's entry point.  The primary boot loader comes from Atmel, I
>>>> believe, and I assume does not change.  Yet, the 2011.06 release of
>>>> U-Boot changed that address.  (FYI: the two immediately preceding
>>>> releases, 2010.12 and 2011.03, fail to compile with configuration
>>>> errors.  There were definitely changes taking place during that time
>>>> with the Atmel AT91SAM U-Boot code.)  That may be a bug.  I don't
>>>> know who the authority on that question would be.  If it is decided
>>>> the U-Boot code text segment address is incorrect, it wold be nice to
>>>> fix that in the upcoming release.  (If there is time.)
>>> 
>>> For the text base, why we use 0x21f00000 instead of 0x23f00000 is
>>> that, the memory only 64MiB on at91sam9g20ek board, if use 0x23f00000
>>> as the text base, there is only 1MiB reserved for u-boot use. So, we
>>> move down to let more space for u-boot.
>>> 
>>> For the NAND partition, as to the u-boot grow bigger and bigger, so we
>>> reserve more space for it.
>>> 
>>> BTW, when you upgrade the u-boot, please also upgrade the bootstrap.
>>> we always keep the update bootstrap work with mainline u-boot properly.
>>> 
>> 
>> Will AT91loader be updated when U-Boot 2013.07 is released?  If not, I
>> will put the current AT91loader on my board with U-Boot 2013.04 now.
> 
> As Andreas described in previous e-mail, you can find the newest bootstrap at [1].

Yes, thank you.  But, my question is, will AT91loader be updated when U-Boot 2013.07 is released?  If yes, I will wait.  If no, I will use what you is available now.  You have said that one should update the loader when U-Boot is updated.  This is what I wish to do.

> [1] https://github.com/linux4sam/at91bootstrap
> 
> Best Regards,
> Bo Shen
> 


Thank you,

Larry Baker
US Geological Survey
650-329-5608
baker at usgs.gov