Fix Github actions

Repair the lint and CI actions. Add formal verification.

.github/workflows/formal.yml

@@ -0,0 +1,66 @@
+name: run-formal
+on: [push]
+jobs:
+  formal:
+    name: Run RISCV-formal verification suite
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout riscv-formal
+        uses: actions/checkout@v3
+        with:
+          repository: YosysHQ/riscv-formal
+      - name: Checkout SERV
+        uses: actions/checkout@v3
+        with:
+          path: cores/serv/serv-src
+      - uses: YosysHQ/setup-oss-cad-suite@v2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Prepare formal tests
+        run: |
+          cd cores/serv
+          python3 ../../checks/genchecks.py
+# Skip non-instruction tests for now
+#      - run: make -C cores/serv/checks causal_ch0
+#      - run: make -C cores/serv/checks liveness_ch0
+#      - run: make -C cores/serv/checks pc_bwd_ch0
+#      - run: make -C cores/serv/checks pc_fwd_ch0
+#      - run: make -C cores/serv/checks reg_ch0
+#      - run: make -C cores/serv/checks unique_ch0
+      - run: make -C cores/serv/checks insn_add_ch0
+      - run: make -C cores/serv/checks insn_addi_ch0
+      - run: make -C cores/serv/checks insn_and_ch0
+      - run: make -C cores/serv/checks insn_andi_ch0
+      - run: make -C cores/serv/checks insn_auipc_ch0
+      - run: make -C cores/serv/checks insn_beq_ch0
+      - run: make -C cores/serv/checks insn_bge_ch0
+      - run: make -C cores/serv/checks insn_bgeu_ch0
+      - run: make -C cores/serv/checks insn_blt_ch0
+      - run: make -C cores/serv/checks insn_bltu_ch0
+      - run: make -C cores/serv/checks insn_bne_ch0
+      - run: make -C cores/serv/checks insn_jal_ch0
+      - run: make -C cores/serv/checks insn_jalr_ch0
+      - run: make -C cores/serv/checks insn_lb_ch0
+      - run: make -C cores/serv/checks insn_lbu_ch0
+      - run: make -C cores/serv/checks insn_lh_ch0
+      - run: make -C cores/serv/checks insn_lhu_ch0
+      - run: make -C cores/serv/checks insn_lui_ch0
+      - run: make -C cores/serv/checks insn_lw_ch0
+      - run: make -C cores/serv/checks insn_or_ch0
+      - run: make -C cores/serv/checks insn_ori_ch0
+      - run: make -C cores/serv/checks insn_sb_ch0
+      - run: make -C cores/serv/checks insn_sh_ch0
+      - run: make -C cores/serv/checks insn_sll_ch0
+      - run: make -C cores/serv/checks insn_slli_ch0
+      - run: make -C cores/serv/checks insn_slt_ch0
+      - run: make -C cores/serv/checks insn_slti_ch0
+      - run: make -C cores/serv/checks insn_sltiu_ch0
+      - run: make -C cores/serv/checks insn_sltu_ch0
+      - run: make -C cores/serv/checks insn_sra_ch0
+      - run: make -C cores/serv/checks insn_srai_ch0
+      - run: make -C cores/serv/checks insn_srl_ch0
+      - run: make -C cores/serv/checks insn_srli_ch0
+      - run: make -C cores/serv/checks insn_sub_ch0
+      - run: make -C cores/serv/checks insn_sw_ch0
+      - run: make -C cores/serv/checks insn_xor_ch0
+      - run: make -C cores/serv/checks insn_xori_ch0

.github/workflows/lint.yml

@@ -4,13 +4,15 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     name: Linter
+    env:
+      REPO : serv
+      VLNV : serv
     steps:
-      - name: Checkout
-        uses: actions/checkout@v1
-      - name: Lint Verilog source files with Verilator
-        uses: librecores/ci-fusesoc-action@main
+      - name: Checkout repo
+        uses: actions/checkout@v3
         with:
-          command: 'run'
-          core: 'serv'
-          target: 'lint'
-          tool: 'verilator'
+          path: serv
+      - run: sudo apt install verilator
+      - run: pip3 install fusesoc
+      - run: fusesoc library add $REPO $GITHUB_WORKSPACE/$REPO
+      - run: fusesoc run --target=lint $VLNV