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Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC

I'm adding Andrew Lunn in hope this can be tracked down.  This relates
to Kirkwood machines with 1 GB of RAM.  CONFIG_VMSPLIT_3G seems to
lead to network problems.

* Timo Jyrinki <timo.jyrinki@gmail.com> [2019-04-26 14:29]:
> ti 23. huhtik. 2019 klo 1.37 Matti Viljanen (matti.viljanen@kapsi.fi) kirjoitti:
> > I have a Fujitsu Q703 aka. QNap TS-221, with 1GB of RAM and 6282 variant
> > chip inside, and I have hit this behavior.
> ...
> > it get an IP address but the LEDs blink normally - I think this is the
> > same situation Timo had. I have used the recovery image QNap provided
> > and re-flashed the kernel by flash-debian script (and manually cat-ing,
> > too), but soon I should have my TTL serial adaptor ready.
> Thanks a lot for testing, and confirming something goes wrong with
> > I would like to help testing, if you have any ideas. What should I try next?
> Alas I'm out of my depth on the topic regarding what to try next if
> wanting to use the whole 1GB of RAM.
> The workaround limiting RAM to 768MB works fine, and since no variant
> seems to have over 1GB RAM, maybe it's acceptable tradeoff for most so
> this hasn't seen more progress. The workaround in u-boot with the
> adapter is described at
> https://lists.debian.org/debian-arm/2018/06/msg00000.html , and after
> setting that I've used my TS-221 for the past year. It can also be set
> via fw_printenv and fw_setenv (not tested myself) as instructed at
> http://karuppuswamy.com/wordpress/2012/04/16/u-boot-tools-for-debian-arm-linux-in-qnap-server/.
> fw_printenv gives me the following on the last line:
> bootargs=console=ttyS0,115200 root=/dev/ram initrd=0xa00000,0x900000
> ramdisk=34816 mem=768M
> -Timo

Martin Michlmayr

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