ASpeed AST2600-A3 random resets (message BP0c00)

[John Wang]

Hi, Jeff

You can check section 61.2.2 "OTP Configuration Register" in the
ast2600 datasheet

The OTPCFG0 Register Bit9 describes the meaning of "BP0C00"

B means "Boot from SPI"
P means "Secure Boot Pass"
c00 is not explicitly defined in the datasheet

Additionally, you can check SCU064(System Reset Event Log Register),
and It's logged[1] during boot

Based on the logs you shared, WDT related events appears suspicious
and might be worth investigating

[1] https://github.com/openbmc/u-boot/blob/v2019.04-aspeed-openbmc/arch/arm/mach-aspeed/ast2600/scu_info.c#L92

On Tue, Feb 25, 2025 at 3:58 AM Jeff Johnson
<jeff.johnson at aeoncomputing.com> wrote:
>
> Greetings,
>
> For weeks I've been playing hunt the wumpus trying to figure out why
> ASpeed AST2600-A3 SOCs randomly reset. The only serial console
> indication I get of the event is "BP0c00". No messages or console
> output preceding the "BP0c00" event and resetting of the SOC.
>
> These reset events appear to be random. Sometimes they happen within
> an hour of powerup/boot, the last event was over two days after
> powerup/boot.
>
> There have been console messages preceding the BP0c00 message but in
> some cases those messages (eth1 NSCI AEN) occurred over 24 hours prior
> to the BP0c00 and reset.
>
> Has anyone familiar with the ASpeed AST2600-A3 SOC seen this happen
> before? Any ideas what BP0c00 means and what could trigger it to
> occur?
>
> I put it up on pastebin as not to clog the list. If anyone can look
> and give me some insight as to what may be going on I'd appreciate it.
> https://pastebin.com/TNup7kjh
>
> Thanks,
>
> --Jeff
>
> --
> ------------------------------
> Jeff Johnson
> Co-Founder
> Aeon Computing
>
> jeff.johnson at aeoncomputing.com
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