Add support for NoC based interconnect with Constellation

.github/scripts/defaults.sh

@@ -28,8 +28,9 @@ declare -A grouping
 grouping["group-cores"]="chipyard-cva6 chipyard-ibex chipyard-rocket chipyard-hetero chipyard-boom chipyard-sodor chipyard-digitaltop chipyard-multiclock-rocket chipyard-nomem-scratchpad"
 grouping["group-peripherals"]="chipyard-dmirocket chipyard-blkdev chipyard-spiflashread chipyard-spiflashwrite chipyard-mmios chipyard-lbwif"
 grouping["group-accels"]="chipyard-fftgenerator chipyard-nvdla chipyard-sha3 chipyard-hwacha chipyard-gemmini chipyard-streaming-fir chipyard-streaming-passthrough"
+grouping["group-constellation"]="chipyard-constellation"
 grouping["group-tracegen"]="tracegen tracegen-boom"
-grouping["group-other"]="icenet testchipip"
+grouping["group-other"]="icenet testchipip constellation"
 grouping["group-fpga"]="arty vcu118"
 
 # key value store to get the build strings
@@ -58,7 +59,9 @@ mapping["chipyard-sodor"]=" CONFIG=Sodor5StageConfig"
 mapping["chipyard-multiclock-rocket"]=" CONFIG=MulticlockRocketConfig"
 mapping["chipyard-nomem-scratchpad"]=" CONFIG=MMIOScratchpadOnlyRocketConfig"
 mapping["chipyard-fftgenerator"]=" CONFIG=FFTRocketConfig"
+mapping["chipyard-constellation"]=" CONFIG=SharedNoCConfig"
 
+mapping["constellation"]=" SUB_PROJECT=constellation"
 mapping["firesim"]="SCALA_TEST=firesim.firesim.RocketNICF1Tests"
 mapping["firesim-multiclock"]="SCALA_TEST=firesim.firesim.RocketMulticlockF1Tests"
 mapping["fireboom"]="SCALA_TEST=firesim.firesim.BoomF1Tests"

.github/scripts/remote-do-rtl-build.sh

@@ -18,6 +18,13 @@ cd $REMOTE_CHIPYARD_DIR
 ./scripts/init-submodules-no-riscv-tools.sh --skip-validate
 ./scripts/init-fpga.sh
 
+
+# Constellation can run without espresso, but this improves
+# elaboration time drastically
+pushd $REMOTE_CHIPYARD_DIR/generators/constellation
+scripts/install-espresso.sh $RISCV
+popd
+
 if [ $1 = "group-accels" ]; then
     pushd $REMOTE_CHIPYARD_DIR/generators/gemmini/software
     git submodule update --init --recursive gemmini-rocc-tests

.github/scripts/run-tests.sh

@@ -102,12 +102,18 @@ case $1 in
         make -C $LOCAL_CHIPYARD_DIR/tests
         make -C $LOCAL_SIM_DIR $DISABLE_SIM_PREREQ ${mapping[$1]} BINARY=$LOCAL_CHIPYARD_DIR/tests/fft.riscv run-binary-fast
         ;;
+    chipyard-constellation)
+        run_bmark ${mapping[$1]}
+        ;;
     icenet)
         make run-binary-fast BINARY=none -C $LOCAL_SIM_DIR $DISABLE_SIM_PREREQ ${mapping[$1]}
         ;;
     testchipip)
         make run-binary-fast BINARY=none -C $LOCAL_SIM_DIR $DISABLE_SIM_PREREQ ${mapping[$1]}
         ;;
+    constellation)
+        make run-binary-fast BINARY=none -C $LOCAL_SIM_DIR $DISABLE_SIM_PREREQ ${mapping[$1]}
+        ;;
     *)
         echo "No set of tests for $1. Did you spell it right?"
         exit 1

.github/workflows/chipyard-run-tests.yml

@@ -261,6 +261,28 @@ jobs:
         with:
           group-key: "group-cores"
 
+  prepare-chipyard-constellation:
+    name: prepare-chipyard-constellation
+    needs: setup-complete
+    runs-on: self-hosted
+    steps:
+      - name: Delete old checkout
+        run: |
+            ls -alh .
+            rm -rf ${{ github.workspace }}/* || true
+            rm -rf ${{ github.workspace }}/.* || true
+            ls -alh .
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Git workaround
+        uses: ./.github/actions/git-workaround
+      - name: Create conda env
+        uses: ./.github/actions/create-conda-env
+      - name: Build RTL on self-hosted
+        uses: ./.github/actions/prepare-rtl
+        with:
+          group-key: "group-constellation"
+
   prepare-chipyard-peripherals:
     name: prepare-chipyard-peripherals
     needs: setup-complete
@@ -861,6 +883,53 @@ jobs:
           group-key: "group-other"
           project-key: "testchipip"
 
+  constellation-run-tests:
+    name: constellation-run-tests
+    needs: prepare-chipyard-other
+    runs-on: self-hosted
+    steps:
+      - name: Delete old checkout
+        run: |
+            ls -alh .
+            rm -rf ${{ github.workspace }}/* || true
+            rm -rf ${{ github.workspace }}/.* || true
+            ls -alh .
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Git workaround
+        uses: ./.github/actions/git-workaround
+      - name: Create conda env
+        uses: ./.github/actions/create-conda-env
+      - name: Run tests
+        uses: ./.github/actions/run-tests
+        with:
+          group-key: "group-other"
+          project-key: "constellation"
+
+  chipyard-constellation-run-tests:
+    name: chipyard-constellation-run-tests
+    needs: prepare-chipyard-constellation
+    runs-on: self-hosted
+    steps:
+      - name: Delete old checkout
+        run: |
+            ls -alh .
+            rm -rf ${{ github.workspace }}/* || true
+            rm -rf ${{ github.workspace }}/.* || true
+            ls -alh .
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Git workaround
+        uses: ./.github/actions/git-workaround
+      - name: Create conda env
+        uses: ./.github/actions/create-conda-env
+      - name: Run tests
+        uses: ./.github/actions/run-tests
+        with:
+          group-key: "group-constellation"
+          project-key: "chipyard-constellation"
+
+
   firesim-run-tests:
     name: firesim-run-tests
     needs: setup-complete
@@ -939,16 +1008,35 @@ jobs:
   # When adding new top level jobs, please add them to `needs` below
   all_tests_passed:
     name: "all tests passed"
-    needs: [commit-on-master-check, tutorial-setup-check, documentation-check,
-            chipyard-rocket-run-tests, chipyard-hetero-run-tests, chipyard-boom-run-tests, chipyard-cva6-run-tests, chipyard-ibex-run-tests,
-            chipyard-sodor-run-tests, chipyard-dmirocket-run-tests, chipyard-spiflashwrite-run-tests, chipyard-fftgenerator-run-tests,
-            chipyard-spiflashread-run-tests, chipyard-lbwif-run-tests, chipyard-sha3-run-tests,
-            chipyard-streaming-fir-run-tests, chipyard-streaming-passthrough-run-tests, chipyard-hwacha-run-tests,
-            chipyard-gemmini-run-tests, chipyard-nvdla-run-tests,
-            tracegen-boom-run-tests, tracegen-run-tests,
-            icenet-run-tests, testchipip-run-tests,
+    needs: [commit-on-master-check,
+            tutorial-setup-check,
+            documentation-check,
+            chipyard-rocket-run-tests,
+            chipyard-hetero-run-tests,
+            chipyard-boom-run-tests,
+            chipyard-cva6-run-tests,
+            chipyard-ibex-run-tests,
+            chipyard-sodor-run-tests,
+            chipyard-dmirocket-run-tests,
+            chipyard-spiflashwrite-run-tests,
+            chipyard-fftgenerator-run-tests,
+            chipyard-spiflashread-run-tests,
+            chipyard-lbwif-run-tests,
+            chipyard-sha3-run-tests,
+            chipyard-streaming-fir-run-tests,
+            chipyard-streaming-passthrough-run-tests,
+            chipyard-hwacha-run-tests,
+            chipyard-gemmini-run-tests,
+            chipyard-nvdla-run-tests,
+            chipyard-constellation-run-tests,
+            tracegen-boom-run-tests,
+            tracegen-run-tests,
+            icenet-run-tests,
+            testchipip-run-tests,
+            constellation-run-tests,
             prepare-chipyard-fpga, # firesim-run-tests,
-            fireboom-run-tests, firesim-multiclock-run-tests]
+            fireboom-run-tests,
+            firesim-multiclock-run-tests]
     runs-on: ubuntu-latest
     steps:
       - run: echo Success!

.gitignore

@@ -21,3 +21,4 @@ env-riscv-tools.sh
 env-esp-tools.sh
 .bsp/
 .conda-env/
+.#*

.gitmodules

@@ -127,3 +127,6 @@
 [submodule "toolchains/libgloss"]
 	path = toolchains/libgloss
 	url = https://github.com/ucb-bar/libgloss-htif.git
+[submodule "generators/constellation"]
+	path = generators/constellation
+	url = https://github.com/ucb-bar/constellation.git

build.sbt

@@ -148,7 +148,13 @@ lazy val chipyard = (project in file("generators/chipyard"))
   .dependsOn(testchipip, rocketchip, boom, hwacha, sifive_blocks, sifive_cache, iocell,
     sha3, // On separate line to allow for cleaner tutorial-setup patches
     dsptools, `rocket-dsp-utils`,
-    gemmini, icenet, tracegen, cva6, nvdla, sodor, ibex, fft_generator)
+    gemmini, icenet, tracegen, cva6, nvdla, sodor, ibex, fft_generator,
+    constellation)
+  .settings(libraryDependencies ++= rocketLibDeps.value)
+  .settings(commonSettings)
+
+lazy val constellation = (project in file("generators/constellation"))
+  .dependsOn(rocketchip)
   .settings(libraryDependencies ++= rocketLibDeps.value)
   .settings(commonSettings)
 

docs/Advanced-Concepts/Top-Testharness.rst

@@ -38,7 +38,7 @@ We also see this class define several ``ElaborationArtefacts``, files emitted af
 Subsystem
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Looking in `generators/chipyard/src/main/scala/Subsystem.scala <https://github.com/ucb-bar/chipyard/blob/master/generators/chipyard/src/main/scala/Subsystem.scala>`__, we can see how Chipyard's ``Subsystem``
+Looking in `generators/chipyard/src/main/scala/Subsystem.scala <https://github.com/ucb-bar/chipyard/blob/main/generators/chipyard/src/main/scala/Subsystem.scala>`__, we can see how Chipyard's ``Subsystem``
 extends the ``BaseSubsystem`` abstract class. ``Subsystem`` mixes in the ``HasBoomAndRocketTiles`` trait that
 defines and instantiates BOOM or Rocket tiles, depending on the parameters specified.
 We also connect some basic IOs for each tile here, specifically the hartids and the reset vector.

docs/Chipyard-Basics/Chipyard-Components.rst

@@ -47,6 +47,9 @@ Accelerators
 System Components:
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+**constellation**
+  A generator for network-on-chip (NoC) interconnects.
+
 **icenet**
   A Network Interface Controller (NIC) designed to achieve up to 200 Gbps.
 

docs/Customization/NoC-SoCs.rst

@@ -0,0 +1,34 @@
+SoCs with NoC-based Interconnects
+==================================
+
+The primary way to integrate a network-on-chip into a Chipyard SoC is to map one of the standard TileLink crossbar-based buses (System Bus, Memory Bus, Control Bus, etc.) to a Constellation-generated NoC.
+
+The interconnect can be mapped as a "private" interconnect for the TileLink bus, in which case a dedicated interconnect to carry the bus traffic will be generated.
+Alternatively, the interconnect can be mapped to a shared global interconnect, in which case multiple TileLink buses can be transported over a single shared interconnect.
+
+Private Interconnects
+---------------------
+An example of integrating dedicated private interconnects for the System Bus, Memory Bus, and Control Bus can be seen in the ``MultiNoCConfig`` of `generators/chipyard/src/main/scala/config/NoCConfigs.scala <https://github.com/ucb-bar/chipyard/blob/main/generators/chipyard/src/main/scala/config/NoCConfigs.scala>`__.
+
+.. literalinclude:: ../../generators/chipyard/src/main/scala/config/NoCConfigs.scala
+    :language: scala
+    :start-after: DOC include start: MultiNoCConfig
+    :end-before: DOC include end: MultiNoCConfig
+
+Note that for each bus (``Sbus`` / ``Mbus`` / ``Cbus``), the configuration fragment provides both a parameterization of the private NoC, as well as a mapping between TileLink agents and physical NoC nodes.
+
+For more information on how to construct the NoC parameters, see the `Constellation documentation <http://constellation.readthedocs.io>`__.
+
+
+Shared Global Interconnect
+---------------------------
+An example of integrating a single global interconnect that supports transporting multiple TileLink buses can be seen in the ``SharedNoCConfig`` of `generators/chipyard/src/main/scala/config/NoCConfigs.scala <https://github.com/ucb-bar/chipyard/blob/main/generators/chipyard/src/main/scala/config/NoCConfigs.scala>`__.
+
+.. literalinclude:: ../../generators/chipyard/src/main/scala/config/NoCConfigs.scala
+    :language: scala
+    :start-after: DOC include start: SharedNoCConfig
+    :end-before: DOC include end: SharedNoCConfig
+
+Note that for each bus, the configuration fragment provides only the mapping between TileLink agents and physical NoC nodes, while a separate fragement provides the configuration for the global interconnect.
+
+For more information on how to construct the NoC parameters, see the `Constellation documentation <http://constellation.readthedocs.io>`__.

docs/Customization/index.rst

@@ -3,7 +3,9 @@ Customization
 
 These guides will walk you through customization of your system-on-chip:
 
-- Contructing heterogenous systems-on-chip using the existing Chipyard generators and configuration system.
+- Constructing heterogenous systems-on-chip using the existing Chipyard generators and configuration system.
+
+- Constructing SoCs with a NoC (network-on-chip) based interconnect using Constellation
 
 - How to include your custom Chisel sources in the Chipyard build system
 
@@ -36,6 +38,7 @@ We recommend reading all these pages in order. Hit next to get started!
    :caption: Customization:
 
    Heterogeneous-SoCs
+   NoC-SoCs
    Custom-Chisel
    Custom-Core
    RoCC-or-MMIO

docs/Generators/Constellation.rst

@@ -0,0 +1,17 @@
+Constellation
+========================
+
+.. image:: ../_static/images/bigsoc.svg
+
+`Constellation <https://github.com/ucb-bar/constellation>`__ is a Chisel NoC RTL generator framework designed from the ground up to support integration in a heterogeneous SoC and evaluation of highly irregular NoC architectures.
+
+ - Constellation generates **packet-switched wormhole-routed networks with virtual networks and credit-based flow control**
+ - Constellation supports **arbitrary directed graph network topologies**, including **irregular** and **hierarchical** network topologies
+ - Constellation includes a **routing algorithm verifier and routing-table compiler**, which can verify and generate deadlock-free routing tables for arbitrary topologies
+ - Constellation is a **protocol-independent transport layer**, yet is capable of compliant deadlock-free transport of protocols like **AXI-4** and **TileLink**
+ - Constellation supports drop-in **integration in Chipyard/Rocketchip SoCs**
+ - Constellation is **rigorously tested**, with almost 100 different tests across as many network configurations
+
+Constellation is fully integrated into Chipyard, and can be used to generate almost any interconnect in a Chipyard/Rocketchip-based SoC.
+
+For documentation on Constellation, see its `documentation pages <http://constellation.readthedocs.io>`__.

docs/Generators/index.rst

@@ -21,6 +21,7 @@ so changes to the generators themselves will automatically be used when building
    Rocket-Chip
    Rocket
    BOOM
+   Constellation
    Hwacha
    Gemmini
    IceNet