| commit | 171540d41cc1054980ab4317b93f2ef81a868273 | [log] [tgz] |
|---|---|---|
| author | Michael Schaffner <msf@opentitan.org> | Tue Jan 21 18:58:25 2020 -0800 |
| committer | Michael Schaffner <msf@google.com> | Fri Jan 24 18:12:32 2020 -0800 |
| tree | e45de1ae0e890b5b5b4eb862a09ce348f7bc92bc | |
| parent | 8067f46ae90cedc7a57ff5a77d56fef960282758 [diff] |
[prim_arbiter] Add binary tree implementation for RR arbiter This adds a second RR arbiter implementation that is based on a binary tree. The prim_arbiter module has thus been split into two modules named prim_arbiter_ppc (original implementation) and prim_arbiter_tree. The original implementation uses parallel prefix computing to determine the next grant signal, and is better suited for ASIC implementations with low timing pressure, since it can result in a slightly more compact circuit. The binary tree implementation maps better on FPGAs and in situations where timing pressure is high (both in ASIC and FPGA logic). Signed-off-by: Michael Schaffner <msf@opentitan.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 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 either access it online or build it locally by following the steps below.
$ sudo apt install curl python3 python3-pip $ pip3 install --user -r python-requirements.txt
$ ./util/build_docs.py --preview
This compiles the documentation into ./build/docs and starts a local server, which allows you to access the documentation at http://127.0.0.1:1313.
Have a look at CONTRIBUTING 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).