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docs: update usage/custom_pdk_builds

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Mohamed Gaber
2024-12-22 12:38:04 +02:00
parent 3876562d27
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docs/source/usage/custom_pdk_builds.md
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@@ -1,14 +1,14 @@
# Custom-Building PDKs
The pre-built version of the sky130 PDK variants included with OpenLane includes the following standard cell libraries:
# Custom PDK Installations
The sky130 PDK variants pulled using `make pdk` include the following standard cell libraries:
* sky130_fd_io
* sky130_fd_pr
* sky130_fd_sc_hd
* sky130_fd_sc_hvl
* sky130 sram modules
If you need other libraries, you will have to resort to manual builds using [Volare](https://github.com/efabless/volare) as shown below. You will need Git 2.35+ and Docker.
Note that this will take a while, from 20 minutes to an hour depending on your internet speed and compute power.
If you need other libraries (including the ReRAM library for `sky130B`), you will have to download them using [Volare](https://github.com/efabless/volare) as shown below.
Start a venv shell using `make start-build-env`. You should see a prompt looking kind of like this:
@@ -16,30 +16,16 @@ Start a venv shell using `make start-build-env`. You should see a prompt looking
(venv) [user@host openlane]$
```
First of all, install volare:
Then, download the libraries as follows: The `-l` options are the libraries you want to include. For example, to download `sky130_fd_sc_hs`, you can add `-l sky130_fd_sc_hs` to your current set of libraries using the following command:
```bash
pip3 install --upgrade --no-cache-dir volare
```
Then, build the PDK as follows: The `-l` options are the libraries you want to include. For example, to also include `sky130_fd_sc_hs`, you can add `-l sky130_fd_sc_hs` to the default set of libraries using the following command:
```bash
volare build -j$(nproc) --pdk sky130 --clear-build-artifacts --sram -l sky130_fd_io -l sky130_fd_pr -l sky130_fd_sc_hvl -l sky130_fd_sc_hd -l sky130_fd_sc_hs
volare enable --pdk sky130 -l sky130_fd_sc_hs
```
You can also add `-l all` to just include all of them:
```bash
volare build -j$(nproc) --pdk sky130 --clear-build-artifacts --sram -l all
volare enable --pdk sky130 -l all
```
Either way, go grab a smoothie. This will take a while.
After it is done, you can then enable the resulting PDK as such:
```bash
volare enable
```
Et voila, your custom-built PDK is ready.
After it is done, your new SCLs are ready to use.