About cache enabling in LWIP port of BBB in RTEMS
Marcos Díaz
marcos.diaz at tallertechnologies.com
Fri Sep 18 15:42:24 UTC 2015
Well, after talking with the guys of beagleboard, they made me update the
u-boot version.
With that I could make the cache and ethernet work Ok in Rev A5C !!!.
So, Ragu, if you can update your BBB's u-boot, try again using RTEMS with
LWIP and cache enabled, and test it.
Download it from here:
https://rcn-ee.com/rootfs/bb.org/testing/2015-09-13/console/BBB-eMMC-flasher-debian-8.2-console-armhf-2015-09-13-2gb.img.xz
md5sum: 64de53c03df006f2cb6f95244871313e
decompress the image and save it in the sd card using dd.
And this guide helped me:
http://derekmolloy.ie/write-a-new-image-to-the-beaglebone-black/#Flashing_the_BBB_with_the_SD_Card_Image
Hope it helps! Let me know how the tests go.
Greetings!
On Thu, Sep 17, 2015 at 5:53 PM, Marcos Díaz <
marcos.diaz at tallertechnologies.com> wrote:
> I can only tell you about the boards i tested:
>
> I have a revision A5C board with an XAM3359AZCZ100 microcontroller. The
> use of cache together with ethernet makes this break.
>
> I have a revision C board with an AM3358BZCZ100. This does work with
> cache and ethernet.
>
> Apparently Ragu has a rev A5 with an AM3358BZCZ100. Cache doesn't work
> for him.
>
> After reading this document:
>
> http://elinux.org/Beagleboard:BeagleBoneBlack#Board_Revisions_and_Changes
>
> I can say that the boards I have match with that descripcion. Revisions
> A4, A4A, A4B have an AM3352 processor,
> rev A5A A5B A5C A6 A6A have an XAM3359, and revisions B and C have an
> AM3358 processor.
>
> I'm not very sure about what Ragu has, since there it says he has a rev A5
> (not mentioned in the document) but with the processor of the newer
> revisions (AM3358).
>
> In Ragu's case the checking of the registers for the processor revision
> wont do any help, since he has the same processor that in my case works Ok,
> but his doesn't.
>
> Hope this clarifies.
>
>
>
> On Thu, Sep 17, 2015 at 5:02 PM, Joel Sherrill <joel.sherrill at oarcorp.com>
> wrote:
>
>> Can of of you guys start a table/spreadsheet about board
>> and SoC revisions and when we think it is broken and when
>> it works?
>>
>> I emailed the BB project lead and he didn't know anything
>> off hand but suggested subscribing to beagleboard at googlegroups.com
>> and asking there. Someone there may actually have an answer.
>>
>> --joel
>>
>> On 9/17/2015 2:05 PM, Marcos Díaz wrote:
>>
>>> Ragu,
>>> I would like you to confirm which revision you have, for this I printed
>>> the following registers in the BBB:
>>>
>>> 0x44E10600 and 0x44E10604
>>>
>>> The first will print something like:
>>> 1b94402e for BBB rev A5C (XAM3359AZCZ100) ( 1b means rev.A of the
>>> microcontroller)
>>> 2b94402e for BBB rev C (AM3358BZCZ100) (2b means rev B of the
>>> microcontroller)
>>>
>>> The second register will print something like:
>>>
>>> 20ff0383 for A5c (this means that this is AM3359)
>>> 20fd0383 for C (this means it is an AM3358).
>>>
>>> Please let me know which are this values in your Board.
>>>
>>> Thanks!
>>>
>>>
>>>
>>> On Thu, Sep 17, 2015 at 11:44 AM, Marcos Díaz <
>>> marcos.diaz at tallertechnologies.com <mailto:
>>> marcos.diaz at tallertechnologies.com>> wrote:
>>>
>>> Yes, sorry about that, There are two registers we can check to see
>>> the different revision numbers. I will check it myself once i confirm that
>>> the different revisions are the problem (i'm not sure because of what Ragu
>>> said). Thanks!
>>>
>>> On Thu, Sep 17, 2015 at 11:12 AM, Joel Sherrill <
>>> joel.sherrill at oarcorp.com <mailto:joel.sherrill at oarcorp.com>> wrote:
>>>
>>>
>>>
>>> On 9/17/2015 8:43 AM, Marcos Díaz wrote:
>>>
>>> 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
>>>
>>>
>>> Can we determine that in software?
>>>
>>> On Thu, Sep 17, 2015 at 10:32 AM, Joel Sherrill <
>>> joel.sherrill at oarcorp.com <mailto:joel.sherrill at oarcorp.com> <mailto:
>>> joel.sherrill at oarcorp.com <mailto:joel.sherrill at oarcorp.com>>> wrote:
>>>
>>>
>>>
>>> On September 17, 2015 8:26:41 AM CDT, "Marcos Díaz" <
>>> marcos.diaz at tallertechnologies.com <mailto:
>>> marcos.diaz at tallertechnologies.com> <mailto:
>>> marcos.diaz at tallertechnologies.com <mailto:
>>> 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 <mailto:
>>> joel.sherrill at oarcorp.com> <mailto:joel.sherrill at oarcorp.com <mailto:
>>> 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> <mailto:
>>> marcos.diaz at tallertechnologies.com <mailto:
>>> marcos.diaz at tallertechnologies.com>>
>>> ><mailto:marcos.diaz at tallertechnologies.com <mailto:
>>> marcos.diaz at tallertechnologies.com> <mailto:
>>> 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
>>>
>>>
>>>
>>> --
>>> 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
>>>
>>>
>>>
>>>
>>> --
>>>
>>> ______________________________
>>>
>>> <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
>>>
>>>
>>>
>>>
>>>
>>> --
>>>
>>> ______________________________
>>>
>>> <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
>>>
>>>
>>>
>> --
>> 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
>>
>
>
>
> --
>
> ______________________________
>
> <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
>
>
--
______________________________
<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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