[coreboot] Atom E3815 processor - reporting incorrect PCI device id

Mike Hibbett mhibbett at ircona.com
Wed Jun 18 08:38:07 CEST 2014

Thanks Sean. I was looking at that document last night, didn't see anything obvious, I suspect it's a hard strap related issue. I'll double check.



-----Original Message-----
From: Sean McNeil [mailto:seanmcneil3 at gmail.com] 
Sent: 18 June 2014 06:58
To: Mike Hibbett; coreboot at coreboot.org
Subject: Re: [coreboot] Atom E3815 processor - reporting incorrect PCI device id

Hi Mike,

I believe it is one of the Reserved bits at 85:84 or 82, but not certain. You can check ILB 514482.

Are the boards identical?
Are the sizes of flash identical?
Any hardware straps connected?

or are you replacing the CPU in the same board? If unique boards, I would dump back the flash and verify.


On 06/18/2014 12:22 PM, Mike Hibbett wrote:
> Hi Sean,
> I would have thought so too, but the devices are using the same IFD.
> Do you know what the ifd parameter is that affects this?
> Cheers,
> Mike
> Sent with AquaMail for Android
> http://www.aqua-mail.com
> On 18 June 2014 01:08:25 Sean McNeil <seanmcneil3 at gmail.com> wrote:
>> Hi Mike,
>> This is due to a bad or missing IFD. You need to have the correct information in the bootStrap settings.
>> Cheers,
>> Sean
>> On 06/17/2014 10:27 PM, Mike Hibbett wrote:
>>> Hi all,
>>> I have two B3 stepping E3815 processors, one is reporting a PCI device id of 0x0f00 ( as expected ) but another is reporting 0x0000. I can work round that in the BAYTRAIL_FSP CoreBoot build but cannot install Linux, and I'm guessing that having a wonky device id may be involved. Has anyone else seen this and know the work around? I can't see anything about it on the Intel IBL.
>>> Cheers,
>>> Mike.
>> --
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