Add a GitHub workflow to autogenerate the register docs.

.github/workflows/doc-gen.yml

@@ -0,0 +1,61 @@
+# docs: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+
+name: Build Register Documentation
+
+on:
+  workflow_dispatch:
+  pull_request:
+
+jobs:
+  build:
+    name: Build reigster documentation and upload artifact
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install peakrd-uvm
+        run: |
+          python3 -m pip install \
+              peakrdl-uvm==2.2.0 \
+              peakrdl-regblock==0.10.0 \
+              peakrdl-html==2.9.0 \
+              peakrdl-ipxact==3.3.0
+
+      - name: Generate docs
+        run: |
+          echo Running script
+          tools/scripts/reg_doc_gen.sh
+
+      - name: Stage documents
+        run: |
+          mkdir -p /tmp/pages-docs/0.8
+          cp -R src/integration/docs/caliptra_reg_html /tmp/pages-docs/0.8/internal-regs
+          cp -R src/soc_ifc/docs/caliptra_top_reg_html /tmp/pages-docs/0.8/external-regs
+          find /tmp/pages-docs
+
+      - name: Generate GitHub Pages artifacts
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: /tmp/pages-docs
+
+# Uncomment once this workflow is on a branch that is allowed to run under the github-pages environment
+#
+#  deploy:
+#    name: Deploy artifacts to GitHub Pages
+#      needs: build
+#
+#      permissions:
+#        pages: write
+#        id-token: write
+#
+#      environment:
+#        - name: github-pages
+#          url: {{ steps.deployment.outputs.page_url }}
+#
+#      runs-on: ubuntu-22.04
+#      steps:
+#        - name: Deploy to GitHub Pages
+#          id: deployment
+#          uses: actions/deploy-pages@v1