| commit | 3e20f8fefba2c91adef02c8bca0485d70696c81f | [log] [tgz] |
|---|---|---|
| author | Michael Schaffner <msf@google.com> | Thu Sep 16 17:14:25 2021 -0700 |
| committer | Michael Schaffner <msf@google.com> | Thu Sep 30 10:06:43 2021 -0700 |
| tree | 864cd940d461abe5385d72598862551a7d681d82 | |
| parent | ccf90f0c1b3d70c636bdd7670cfe9fd679e94f69 [diff] |
[prim_alert_sender] Simplify sender and clear ping req upon sigint This simplifies the sender state machine and removes the explicit SigInt state. It also simplifies the response behavior which so far toggled the alert lines during a signal integrity error. The new behavior is that the alert diff pair is just pulled to zero in case of a signal integrity alert, thereby simplifying the protocol. Further, for the in-band alert channel reset feature, we intend to leverage sigint errors on the ping/ack lines to re-initialize the sender FSM and clear any pending ping requests on the sender side. This change makes sure that upon deassertion of a sigint condition, we actually clear the ping request set-reg. Signed-off-by: Michael Schaffner <msf@google.com>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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