Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

06/25/2014

05:09 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Dirty gets appended to the version string for both u-boot and the kernel when you compile source code that has change... Jonathan Cormier

05:05 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

I pulled the AM335XPSP_04.06.00.08 tag and there were a lot of differences. I don't think it matters
that much as we... Anonymous

04:58 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Looks like both the 03 and 08 branches have the same 2011.09 date so harder to determine which branch of code you wer... Jonathan Cormier

04:55 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

You were likely using the code from the AM335XPSP_04.06.00.08 branch before and now should be using the u-boot-2013.1... Jonathan Cormier

02:05 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
Can you tell me if I were to pull a full u-boot "tree" from your "u-boot-mityarm-335x.git/tree", ... Anonymous

12:18 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Seems like when I used our NAND mlo/u-boot burn in scripts, I blasted over the old u-boot by erasing NAND from 0 to 0... Anonymous

12:11 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Not sure what happened, but even placing the original MLO back it will not boot:
U-Boot SPL 21401-101.01.00.02-dir... Anonymous

12:02 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Booting from the mmc card now does not show that u-boot in NAND has any issues.
U-Boot# nand read 8d000000 80000 1... Anonymous

11:56 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Yes we decided to store everything in nand using the correct ecc so we disabled the nandecc command. So you do not n... Jonathan Cormier

11:43 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Looks like we can't reach u-boot with the new MLO. We see the following and then it stops. If we plug in the
mmc, w... Anonymous

11:34 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Thanks Jonathan,
It seems the u-boot nandecc command has changed. We used to run the following script for
burn... Anonymous

11:17 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Okay. I created a FAQ about this issue incase anyone else runs into it.
https://support.criticallink.com/redmine/p... Jonathan Cormier

11:13 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
Yes there is indeed an error. I'll try the newer MLO to see how that works.
Thanks,
John C... Anonymous

10:18 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

If you confirm there are bit flips you can then flash just the UBL into the NAND and see if it boots fine. You'll se... Jonathan Cormier

10:13 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Try doing to following. It should print out bitflips if it finds them.... Jonathan Cormier

09:53 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
I don't have access to a booted Linux, only u-boot. I created a text script that runs the u-boot ... Anonymous

06/24/2014

05:19 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

That is what I'm suggesting. You can verify if this is the issue by running the 'nand dump' or 'nand read' command a... Jonathan Cormier

05:07 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

So let me try and clarify the issue. We have been running our u-boot for about 10 months with no issues. Are you sugg... Anonymous

04:56 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Those ecc errors are coming from reading the environment from nand. If I remember correctly the older u-boot saved t... Jonathan Cormier

04:49 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

No nevermind, thats not correct. You do have a 256MB nand module. So the first u-boot should be correct. Jonathan Cormier

04:47 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

U-Boot mainline:
origin/u-boot-2013.10: d35e05656457c2d3715de8c3eb7c777375c160ae
u-boot config: mityarm335x_4kpag... Jonathan Cormier

04:46 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Woops hangon didn't notice that you had a 3352 module. They have a larger nand and require a special u-boot build. Jonathan Cormier

04:40 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
Something is very unhappy. Here is the boot:
CCCCCCCC
U-Boot SPL 2013.10-gd35e056 (Jun 03 2014 ... Anonymous

04:28 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

There was a bug with the older u-boot where ecc was not enabled when the UBL loaded the u-boot image. This meant tha... Jonathan Cormier

04:22 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Here is the boot sequence:
----------------------------------------------------------------
U-Boot# CCCCCCCC
U-Boo... Anonymous

04:14 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

John,
What version of U-boot are you using? If you can include the full bootlog that would be helpful. Jonathan Cormier

03:59 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

As added information, the mtest command works.
Commands that *do* work:
mtest 402fffe0 402ffffe A5A500FF
mtest 8... Anonymous

03:24 PM Software Development: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

We just received one of our units back from the field and it hangs running a "mw.b" command in the u-boot param scrip... Anonymous