Embedded Intel Atom® Processors
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Elkhart Lake PSE asking for reboot

KVN
Beginner
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Hi!

 

We Elkhart Lake x6427FE based system. No Battery. Slimboot used.

During BIOS loading it is asking for reboot because PSE is enabled though it is disabled in SLIMBOOT. 

KVN_0-1722223161285.png

After reset - it is continue to payload fine. However we want to get rid off this situation, that we dont need to reset it all the time

 

If found absolutely same situation described here but with coreboot:

https://ion.lc/mirr/coreboot/commit/8e0bfe263c1a944f230b38097a5a917b77542afe

soc/intel/elkhartlake: Disable Intel PSE by default

Disable PSE loading by default. If left enabled (current default),
the EHL coreboot will end up in endless restart loop, due to FSP
unable to locate PSE FW image and trigger global reset.

However disabling this flag (PchPseEnable) will cause the coreboot
to trigger a single reset due to CSE signal (HECI: CSE does not
meet required prerequisites). The reason behind this is that FSP
need to perform static disabling (power gate) to fully shut down
PSE HW, and to do this will need to global reset entire system
including CSE. Then PMC will power gate PSE from the start.

To avoid this behavior, the best way to disable PSE is to disable
via IFWI FIT softstrap (For specific detail can refer to Intel EHL
coreboot MR2 release notes). With this, PMC will power gate PSE
from the first cold boot and system will boot happily without
single reset behavior.

 I dont understand how can I change IFWI FIT soft straps? Please help me to understand how can avoid reboot 

Thank you

 

 

 

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CarlosAM_INTEL
Moderator
682 Views

Hello, @KVN:

Thank you for contacting Intel Embedded Community.

 

You should address this request using as a reference the channel stated in the following website:


https://github.com/slimbootloader/slimbootloader/issues

 

Best regards,

@CarlosAM_INTEL.

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Nivedha
Beginner
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Hello KVN,

 

We are using Elkhart Lake X6212RE, and we are also facing the issue of getting stuck in the S5 state; after that, we are not getting any sequence.

If your board is booted now, please help us with these.

Our board is also not booting and after power button no states are coming.

Thank you in advance.

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CarlosAM_INTEL
Moderator
415 Views

Hello,  @Nivedha 

 

Thank you for contacting Intel Embedded Support. 

 

We have received your request but we need to address the following questions to understand it:

 

Could you please clarify if this request is related to a design developed by you or by a third-party company?

 

Could you please let us know the name of the manufacturer, the part number, and where we can find the information if this request is related to a third-party design?

 

If it is your design, please let us know the place of purchase of the cited Intel processors and their part numbers.

 

We are waiting for your reply.

 

Best regards,

@CarlosAM_INTEL.

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KVN
Beginner
395 Views

Hi Nivedha,

What DC-DC converter you use for VCCIN?

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