About cache enabling in LWIP port of BBB in RTEMS

[Marcos Díaz]

Yes, in my case the older (that doesn't work) revision is a
XAM3359AZCZ100

And the rev C (that works well with cache) is
AM3358BZCZ100

On Thu, Sep 17, 2015 at 10:32 AM, Joel Sherrill <joel.sherrill at oarcorp.com>
wrote:

>
>
> On September 17, 2015 8:26:41 AM CDT, "Marcos Díaz" <
> marcos.diaz at tallertechnologies.com> wrote:
> >Hi,
> >
> >How did you see the revision number? if you are using u-boot you can
> >pause the start and write printenv and enter to see that:
> >
> >
> >board=am335x
> >board_name=A335BNLT
> >board_rev=00C0
> >
> >
> >This is in my version.
> >
> >Please tell me so I can check if is the revision, or perhaps is
> >something else in u-boot initialization.
> >
> >
> >For the question Joel asked there is a way:
> >
> >
> http://dumb-looks-free.blogspot.com.ar/2014/05/beaglebone-black-bbb-revision-serial.html
> >
> >apparently, in the eeprom thorugh i2c it is recorded. But first we must
> >confirm that is a problem from the revisions, since Ragu has the
> >problem in a rev C.
>
> Does the SoC itself have a revision number we can read? It may be that
> newer boards have a newer CPU.
>
> >Greetings
> >
> >
> >On Wed, Sep 16, 2015 at 7:22 PM, Joel Sherrill
> ><joel.sherrill at oarcorp.com> wrote:
> >
> >
> >
> >On 9/16/2015 2:41 PM, ragu nath wrote:
> >
> >Hi Marcos,
> >
> >Great news! I did not  find any solution to the issue. I have a REV C
> >board from element14. Is this the same board you are using?  In my
> >board I saw the issue.
> >
> >Does this have anything to do with the patch you submitted [PATCH]
> >Beaglebone: fix missing clobber in inline assembly.
> >https://lists.rtems.org/pipermail/devel/2015-September/012531.html
> >I have not yet tested with this patch.
> >
> >The freebsd driver is working with cache disabled.  If possible pls
> >check if it is working with cache enabled in your board.
> >
> >
> >If this is a board revision related issue, is there a way
> >programmatically to
> >know which revision the board is? That way the BSP could auto-detect
> >the right
> >thing to do. Otherwise, we may be looking at a BSP variant or a build
> >option.
> >I would rather avoid those if we can auto-detect.
> >
> >--joel
> >
> >
> >Thanks,
> >Ragunath
> >
> >
> >On Mon, Sep 14, 2015 at 7:22 PM, Marcos Díaz
> ><marcos.diaz at tallertechnologies.com
> ><mailto:marcos.diaz at tallertechnologies.com>> wrote:
> >
> >    Hi Ragu,
> >I wanted to know if you were able to see something else about the
> >problem we had in the BBB when using LWIP and enabling cache ( the
> >program freezes).
> >I can tell you that here we were using BBB rev. A5C and had this
> >problem, but now we could test this with a BBB Rev C, and it
> >successfully works with cache enabled (using the same sdcard in both
> >boards, one works and the other doesn't).
> >    Greetings
> >
> >    --
> >
> >    ______________________________
> >
> >    <http://www.tallertechnologies.com>
> >
> >    *
> >    *
> >
> >    Marcos Díaz
> >
> >    Software Engineer
> >
> >    *
> >    *
> >
> >    San Lorenzo 47, 3rd Floor, Office 5
> >
> >    Córdoba, Argentina
> >
> >    *
> >    *
> >
> >    Phone:+54 351 4217888 / +54 351 4218211/ +54 351 7617452
> >
> >    Skype:markdiaz22
> >
> >
> >
> >
> >
> >--
> >ragu
> >
> >
> >--
> >Joel Sherrill, Ph.D.             Director of Research & Development
> >joel.sherrill at OARcorp.com        On-Line Applications Research
> >Ask me about RTEMS: a free RTOS  Huntsville AL 35805
> >Support Available                (256) 722-9985
> >
> >
> >
> >
> >--
> >
> >______________________________
> >
> >
> >
> >
> >Marcos Díaz
> >
> >Software Engineer
> >
> >
> >San Lorenzo 47, 3rd Floor, Office 5
> >
> >Córdoba, Argentina
> >
> >
> >Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
> >
> >Skype: markdiaz22
>
> --joel
>



-- 

______________________________

<http://www.tallertechnologies.com>


Marcos Díaz

Software Engineer


San Lorenzo 47, 3rd Floor, Office 5

Córdoba, Argentina


Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452

Skype: markdiaz22
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