topic Re: IO APIC Reference in Mobile and Desktop Processors

IO APIC Reference

mevers — Thu, 30 Jun 2022 20:17:20 GMT

I was directed to post in the developer forums from here: https://community.intel.com/t5/Processors/IO-APIC-Reference/m-p/1395717#M58374

I was reading through the Intel Atom Z8000 Datasheet to find more information about the IO APIC.

The section about the IO APIC, 18.13.2, specifies that you can use the IDX, WDW, and EOI registers to configure the indirect IO APIC registers. However, I can't find any information on the IO APIC registers. I checked both volumes of the datasheet and the System Architecture Guide Vol 3. Where can I find more information on how to program the IO APIC registers?

Google searching leads me to documentation about 82093AA I/O APIC which seems similar but not the same.

The datasheet talks about "Established APIC programming model". I can't find any information on that either, but I'm assuming it refers to some defacto standard similar to the 82093AA I/O APIC.

Re: IO APIC Reference

CarlosAM_INTEL — Thu, 30 Jun 2022 22:39:29 GMT

Hello, @mevers:

Thank you for contacting Intel Embedded Community.

We want to address the following questions to understand your request:

Could you please let us know the part numbers of the processors related to your request?

We are waiting for your answer.

Best regards,

@CarlosAM_INTEL.

Re: IO APIC Reference

mevers — Fri, 01 Jul 2022 01:14:00 GMT

Hello Carlos,

I am using a Z8350 Atom processor.

https://ark.intel.com/content/www/us/en/ark/products/93361/intel-atom-x5z8350-processor-2m-cache-up-to-1-92-ghz.html

Re: IO APIC Reference

mevers — Fri, 01 Jul 2022 01:45:43 GMT

I believe this is the SoC part number; FJ8066401836620

Re: IO APIC Reference

CarlosAM_INTEL — Mon, 04 Jul 2022 13:25:39 GMT

Hello, @mevers:

Thanks for your reply.

The Intel Atom® x5-Z8350 Processor is a non-embedded processor, as you may confirm in the link that you provided in your communication of June 30th, 2022 6:14 PM.

Due to this fact, the team in charge of this situation will contact you as soon as possible.

Best regards,

@CarlosAM_INTEL.

Re: IO APIC Reference

mevers — Sat, 09 Jul 2022 19:52:55 GMT

Hi Carlos,

I have not heard from anyone. Any idea how soon I can expect to hear?