volare 0.0.1

A sky130 PDK builder/version manager

[WIP] Volare

Volare is a work-in-progress builder and version manager for the builds of the sky130 pdk.

It only works with portable versions of the sky130 open_pdk builds.

Requirements

• Python 3.6+ with PIP

Installation

python3 -m pip install git+https://github.com/efabless/volare

We're looking to make it available in the primary PIP repositories as soon as CI is finished.

Usage

Volare requires a so-called PDK Root. This PDK root can be anywhere on your computer, but by default it's the folder pdks in your home directory. If you have the variable PDK_ROOT set, volare will use that instead. You can also manually override both values by supplying the --pdk-root commandline argument.

Downloading and Enabling PDKs

In its current inception, volare supports builds of the sky130 PDK using Open_PDKs, including the following libraries:

• sky130_fd_io
• sky130_fd_pr
• sky130_fd_sc_hd
• sky130_fd_sc_hvl
• sky130 sram modules

You can enable a particular sky130 PDK by invoking volare enable <open_pdks version>. This will automatically download that particular version of the PDK, if found, and set it as your currently used PDK.

For example, to enable open_pdks 4040b7ca03d03bbbefbc8b1d0f7016cc04275c24, you invoke volare enable 4040b7ca03d03bbbefbc8b1d0f7016cc04275c24.

Of course, this isn't 100% ideal. If you're using a repository with a tool_metadata.yml file, such as OpenLane or DFFRAM, you can just invoke volare enable and Volare will automatically infer the version you're looking folder.

Listing PDKs

Invoking Volare in a terminal will look something like this:

/usr/local/pdk/volare/versions
├── 4040b7ca03d03bbbefbc8b1d0f7016cc04275c24 (enabled)    
└── 34eeb2743e99d44a21c2cedd467675a2e0f3bb91

Where the first path has all the versions installed.

Building PDKs

For special cases, i.e. you require other libraries, you'll have to build the PDK yourself, which Volare does support.

It does require Docker 19.04 or higher, however.

You can invoke volare build --help for more options. Be aware, the built PDK won't automatically be enabled and you'll have to volare enable the appropriate version.

License

The Apache License, version 2.0. See 'License'.