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Webinar: JTAG-based debugging of AMD EPYC servers

Alan Sguigna

January 5, 2021
6:09 pm

ASSET is pleased to announce that yours truly is presenting a technical session on JTAG-based firmware debugging of AMD EPYC servers, to be held on Wednesday, January 27th at 1:30pm Central Standard Time.

The UP Squared Chronicles Episode 4: Using Intel Processor Trace with POST Codes

Alan Sguigna

January 3, 2021
11:52 am

I became curious this past week on how UEFI handles POST codes. These are “markers” for the boot process, and tells you at what stage the platform initialization is. Can we easily correlate POST codes with the operation of the UEFI firmware?

The UP Squared Chronicles Episode 3: Intel Processor Trace

Alan Sguigna

December 21, 2020
8:31 am

Wow! It has been a while. I wrote Episode 2 of my open-source explorations into the AAEON Intel Apollo Lake-based Up Squared board back on June 7th. In that episode, I gave directions on how to build the UEFI debug image for the board, complete with source/symbols for consumption by JTAG debuggers like SourcePoint. In this episode, I show source-level debug with SourcePoint, and take advantage of Intel Processor Trace on the board.

Video recording of Chiplet interconnect test webinar

Alan Sguigna

December 3, 2020
5:14 pm

In case you missed it, a recording of Michael Johnson's webinar, Chiplet Interconnect Testing using JTAG/Boundary Scan, is now available. Click on the link, and enjoy the show.

Webinar: Chiplet interconnect testing using JTAG/boundary scan

Alan Sguigna

November 1, 2020
1:32 pm

Join our webinar on Chiplet interconnect testing using JTAG/boundary scan. Hope to meet you then!

Coding to the SED API: Part 4

Alan Sguigna

October 18, 2020
4:52 pm

In Part 3 of this series, we did a code review of “ltloop”, a utility firmware application that uses the BMC to do out-of-band stress tests of PCI Express ports. In this article, we begin to examine a more general-purpose application that uses JTAG to extract register, memory and IO contents of the target. This On-Target Diagnostic (OTD), called “libtest”, is used by ASSET to test the functionality of run-control on new targets.

Coding to the SED API: Part 3

Alan Sguigna

September 20, 2020
7:56 pm

In the last article on this topic, we did a dive into the main routine of the lt_loop JTAG-based On-Target Diagnostic, seeing the overall flow of the program. In this article, we’ll look at the routine that does the heavy lifting for retraining the PCI Express link and checking for errors.

Coding to the SED API: Part 2

Alan Sguigna

September 7, 2020
3:35 pm

In my previous blog, I did a walkthrough of the source code for main() within the ltloop JTAG-based on-target diagnostic. This article covers main() in more detail, and provides insight into some of the operations of the utility functions and data structures.

Coding to the SED API: Part 1

Alan Sguigna

August 30, 2020
4:11 pm

In my UEFI Forum webinar, I demonstrated a utility function for stressing PCI Express ports at-scale using JTAG. Let’s walk through the source code and see how it works under the hood.

Debugging Intel CATERR using Embedded ITP

Alan Sguigna

July 26, 2020
8:44 pm

In my webinar with the UEFI Forum, I demonstrated some of the utility of using JTAG functionality within BMCs to perform out-of-band debug. This is a tutorial on the coding practices to use the SED API.

Webinar: JTAG-based debugging of AMD EPYC servers

The UP Squared Chronicles Episode 4: Using Intel Processor Trace with POST Codes

The UP Squared Chronicles Episode 3: Intel Processor Trace

Video recording of Chiplet interconnect test webinar

Webinar: Chiplet interconnect testing using JTAG/boundary scan

Coding to the SED API: Part 4

Coding to the SED API: Part 3

Coding to the SED API: Part 2

Coding to the SED API: Part 1

Debugging Intel CATERR using Embedded ITP

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