| commit | 859d51788975ee7c166b17539562803ab4dd375b | [log] [tgz] |
|---|---|---|
| author | Pirmin Vogel <vogelpi@lowrisc.org> | Tue Oct 26 14:27:48 2021 +0200 |
| committer | Pirmin Vogel <vogelpi@lowrisc.org> | Tue Nov 16 23:29:24 2021 +0100 |
| tree | c4d398add265bf35335ce14ba28b4df4f033035f | |
| parent | c366ef897e9b66e01d166e7f0743173981b9e565 [diff] |
[prim] Add option to not clear the packer FIFO upon read There are cases where leaving around the data just read doesn't hurt but instead outputting a deterministic value after read should be avoided. For example, if the packer FIFO is used to feed pseudo-random data into an LFSR, having the packer output such a deterministic value most of the time is bad as it may simplify an attack trying to load the LFSR with deterministic instead of random values. For this reason, this commit adds a new parameter to the packer FIFO primitive to control this behavior on a per-case basis and disables the clearing when used to feed LFSRs or inside prim_edn_req. Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>
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.
This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or “monorepo”, where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.
The project contains comprehensive documentation of all IPs and tools. You can access it online at docs.opentitan.org.
Have a look at CONTRIBUTING and our documentation on project organization and processes for guidelines on how to contribute code to this repository.
Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).