pulp-platform · fischeti · Mar 30, 2026 · Feb 24, 2026 · Feb 24, 2026 · Feb 24, 2026
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
@@ -17,6 +17,10 @@ stages:
 # Sources the environment variables for the IIS environment
 .init-env:
   before_script:
+    # Hard link cached python packages since the UV cache directory
+    # is configured to be on the same filesystem as the build directory in the CI.
+    - export UV_CACHE_DIR=$CI_BUILDS_DIR/../cache/uv
+    - export UV_LINK_MODE=hardlink
     - source iis-env.sh
 
 ##################
@@ -26,6 +30,7 @@ stages:
 init-deps:
   stage: init
   extends:
+    - .init-env
     - .init-deps-tpl
   artifacts:
     paths:
@@ -65,8 +70,8 @@ vsim-compile:
     - .init-env
   needs:
     - generate-rtl
-  variables:
-    FLOO_GEN_ARGS: --no-format
+  extends:
+    - .init-env
   script:
     - make vsim-compile | tee compile.log 2>&1
     - '! grep "\*\* Error" compile.log'
@@ -136,6 +141,7 @@ sim-exps:
 
 subpipe:
   stage: build
+  interruptible: true
   needs:
     - init-deps
   trigger:

diff --git a/.gitlab/common.yml b/.gitlab/common.yml
@@ -4,7 +4,7 @@
 
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
-  PD_COMMIT: "65800b0f2d1c7d331feaffbd83bfe2d8086453e0"
+  PD_COMMIT: "4828594842a7955a8d3a3077ac6454443565da27"
   SPU_COMMIT: "c2e8815487bd713624d74ef3e3e0465196b6d67f"
 
 # Check the cache for bender and python dependencies
@@ -13,31 +13,17 @@ variables:
     key:
       files:
         - Bender.lock
-        - requirements.txt
     paths:
       - .bender
-      - .cache/pip
     policy: pull
 
 # Update the cache with bender and python dependencies
 .init-deps-tpl:
   script:
-    # Check out the biggest bender dependencies serially
-    # to avoid rate limiting issues
-    # TODO(fischeti): Remove once bender supports rate limiting
-    - bender path cheshire
-    - bender path cva6
-    - bender path ibex
-    - bender path floo_noc
-    - bender path idma
-    - bender path cluster_interconnect
-    - bender path snitch_cluster
-    # Collect bender sourcess
-    - bender checkout
-    # Install the python venv
-    - source iis-env.sh
     # Initialize the PD repository
     - make init-pd
+    # Collect bender sources
+    - bender checkout
   cache:
     # inherit all global cache settings
     <<: *global_cache

diff --git a/.python-version b/.python-version
@@ -0,0 +1 @@
+3.11
diff --git a/Bender.lock b/Bender.lock
@@ -88,7 +88,7 @@ packages:
     - common_cells
     - register_interface
   cheshire:
-    revision: 4a3932e1bfb8ab72b2d934d65667caefbe2884fc
+    revision: da7babeeb96aa4778a37d0131b28b3b004222ab1
     version: null
     source:
       Git: https://github.com/pulp-platform/cheshire.git
@@ -154,7 +154,7 @@ packages:
     - common_verification
     - tech_cells_generic
   common_verification:
-    revision: 5fd30c18a6be6f664d1ef9e44d04956fb4e3364e
+    revision: fb1885f48ea46164a10568aeff51884389f67ae3
     version: 0.2.5
     source:
       Git: https://github.com/pulp-platform/common_verification.git
@@ -207,8 +207,8 @@ packages:
       Path: .deps/fhg_spu_cluster
     dependencies: []
   floo_noc:
-    revision: 4c98673d3761dd8909a742012b799039331826a4
-    version: null
+    revision: 959fb172670a7910fcee94c2d82e460c07c0a24c
+    version: 0.8.0
     source:
       Git: https://github.com/pulp-platform/FlooNoC.git
     dependencies:

diff --git a/Bender.yml b/Bender.yml
@@ -7,18 +7,21 @@ package:
   authors:
     - "Tim Fischer <fischeti@iis.ee.ethz.ch>"
 
+remotes:
+  pulp: "https://github.com/pulp-platform"
+
 dependencies:
-  register_interface: { git: "https://github.com/pulp-platform/register_interface.git", version: "0.4.5"                                }
-  axi:                { git: "https://github.com/colluca/axi.git",                      rev: "multicast"                                }
-  common_cells:       { git: "https://github.com/pulp-platform/common_cells.git",       rev: "snitch"                                   }
-  cheshire:           { git: "https://github.com/pulp-platform/cheshire.git",           rev: "main"                                }
-  snitch_cluster:     { git: "https://github.com/pulp-platform/snitch_cluster.git",     rev: "main"                         }
-  floo_noc:           { git: "https://github.com/pulp-platform/FlooNoC.git",            rev: "reduction-vc-rebase"                        }
+  register_interface: "0.4.5"
+  axi: "0.39.9"
+  floo_noc: { version: "0.8.0", upstream_name: "FlooNoC" }
+  apb: "0.2.4"
+  common_cells: "1.39.0"
+  snitch_cluster:     { git: "https://github.com/pulp-platform/snitch_cluster.git",     rev: "main"                                     }
+  cheshire:           { git: "https://github.com/pulp-platform/cheshire.git",           rev: "main"                                     }
   obi:                { git: "https://github.com/pulp-platform/obi.git",                rev: "acfcd0f80c7539aa8da7821a66d9acf2074a5b4e" }
   redmule:            { git: "https://github.com/pulp-platform/redmule.git",            rev: "picobello"                                }
   hci:                { git: "https://github.com/pulp-platform/hci.git",                rev: "06fcba671e060f2e1b03b7ebe2d3e719f1557099" }
   datamover:          { git: "https://github.com/pulp-platform/datamover.git",          rev: "5df9c9bd9e10ad020763c4291c571adf35ef4ae2" } # branch: transpose
-  apb:                { git: "https://github.com/pulp-platform/apb.git",                version: "0.2.4"                                }
   apb_fll_if:         { git: "https://github.com/pulp-platform/apb_fll_if.git",         rev: "structs"                                  }
   axi_obi:            { path: "hw/axi_obi"                                                                                              }
   picobello-pd:       { path: "./pd"                                                                                                    }
@@ -27,6 +30,7 @@ dependencies:
 workspace:
   package_links:
     .deps/snitch_cluster: snitch_cluster
+    .deps/cheshire: cheshire
 
 sources:
   # Source files grouped in levels. Files in level 0 have no dependencies on files in this

diff --git a/Makefile b/Makefile
@@ -34,16 +34,16 @@ L2_TILES = $(shell $(FLOO_GEN) query -c $(FLOO_CFG) endpoints.l2_spm.num 2>/dev/
 BENDER_YML = $(PB_ROOT)/Bender.yml
 BENDER_LOCK = $(PB_ROOT)/Bender.lock
 
-$(PB_GEN_DIR):
-	mkdir -p $@
-
 ################
 # Bender flags #
 ################
 
 COMMON_TARGS += -t rtl -t cva6 -t cv64a6_imafdchsclic_sv39_wb -t snitch_cluster -t pb_gen_rtl
 SIM_TARGS += -t simulation -t test -t idma_test
 
+# Get rid of non-existing PD path dependency warnings
+BENDER += --suppress W22
+
 #############
 # systemRDL #
 #############
@@ -72,7 +72,7 @@ $(PB_GEN_DIR)/pb_addrmap.h: $(PB_GEN_DIR)/picobello_addrmap.rdl $(PB_RDL_ALL)
 	$(PEAKRDL) c-header $< $(PEAKRDL_INCLUDES) $(PEAKRDL_DEFINES) -o $@ -i -b ltoh
 
 $(PB_GEN_DIR)/pb_addrmap.svh: $(PB_RDL_ALL)
-	$(PEAKRDL) raw-header $< -o $@ $(PEAKRDL_INCLUDES) $(PEAKRDL_DEFINES) --format svh
+	$(PEAKRDL) raw-header $< -o $@ $(PEAKRDL_INCLUDES) $(PEAKRDL_DEFINES) --format svh --no-prefix
 
 PB_RDL_HW_ALL += $(PB_GEN_DIR)/pb_soc_regs.sv
 PB_RDL_HW_ALL += $(PB_GEN_DIR)/pb_soc_regs_pkg.sv
@@ -111,7 +111,7 @@ include $(SN_ROOT)/make/common.mk
 include $(SN_ROOT)/make/rtl.mk
 
 $(SN_CFG): $(FLOO_CFG)
-	@sed -i 's/nr_clusters: .*/nr_clusters: $(SN_CLUSTERS),/' $<
+	@sed -i 's/nr_clusters: .*/nr_clusters: $(SN_CLUSTERS),/' $@
 
 .PHONY: sn-hw-clean sn-hw-all
 
@@ -132,7 +132,7 @@ ifeq ($(shell $(VERIBLE_FMT) --version >/dev/null 2>&1 && echo OK),OK)
 endif
 
 floo-hw-all: $(PB_GEN_DIR)/floo_picobello_noc_pkg.sv
-$(PB_GEN_DIR)/floo_picobello_noc_pkg.sv: $(FLOO_CFG) | $(PB_GEN_DIR)
+$(PB_GEN_DIR)/floo_picobello_noc_pkg.sv: $(FLOO_CFG)
 	$(FLOO_GEN) pkg -c $(FLOO_CFG) -o $(PB_GEN_DIR) $(FLOO_GEN_FLAGS)
 
 
@@ -213,27 +213,12 @@ $(call sn_include_deps)
 # Misc #
 ########
 
-BASE_PYTHON ?= python
-PIP_CACHE_DIR ?= $(PB_ROOT)/.cache/pip
 
-.PHONY: dvt-flist python-venv python-venv-clean verible-fmt
+.PHONY: dvt-flist verible-fmt
 
 dvt-flist:
 	$(BENDER) script flist-plus $(COMMON_TARGS) $(SIM_TARGS) > .dvt/default.build
 
-python-venv: .venv
-.venv:
-	$(BASE_PYTHON) -m venv $@
-	. $@/bin/activate && \
-	python -m pip install --upgrade pip "setuptools<81" && \
-	python -m pip install --no-build-isolation --cache-dir $(PIP_CACHE_DIR) -r requirements.txt && \
-	python -m pip install --cache-dir $(PIP_CACHE_DIR) $(shell $(BENDER) path floo_noc) --no-deps && \
-	python -m pip install --cache-dir $(PIP_CACHE_DIR) -e "$(shell $(BENDER) path snitch_cluster)[kernels]"
-
-python-venv-clean:
-	rm -rf .venv
-	rm -rf $(PIP_CACHE_DIR)
-
 verible-fmt:
 	$(VERIBLE_FMT) $(VERIBLE_FMT_ARGS) $(shell $(BENDER) script flist $(SIM_TARGS) --no-deps)
 

diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@
 
 *picobello* is developed as part of the [PULP (Parallel Ultra-Low Power) project](https://pulp-platform.org/), a joint effort between ETH Zurich and the University of Bologna. *picobello* is also supported by the [EUPilot project](https://eupilot.eu), under the name MLS.
 
-## 🚧 Getting started (currently in early development)
+## ⚡ Getting started
 
 ### Environment setup for IIS-members
 
@@ -24,17 +24,15 @@ For non-IIS members, there is some additional setup required to get the environm
 
 The first requirement you need to install is `bender`. Check the [installation page](https://github.com/pulp-platform/bender/tree/master?tab=readme-ov-file#installation) on how to set it up.
 
-#### Virtual Python environment
+#### Python environment
 
-You need to have a python>=3.11 installed, in order to create the virtual python environment:
+To generate certain source files with python you need to have [uv](https://docs.astral.sh/uv/) installed, which will create the virtual environment and install the required dependencies. To set up the environment, run:
 
 ```bash
-make python-venv
+uv sync --locked
 source .venv/bin/activate
 ```
 
-By default, it will use the `python` in your `$PATH`. If you want to use a specific python version, you can set the `BASE_PYTHON` environment variable accordingly.
-
 #### Toolchains
 
 Picobello requires two different toolchains at the moment:

diff --git a/REUSE.toml b/REUSE.toml
@@ -4,14 +4,23 @@
 
 version = 1
 
-# Project documentation and tool configuration files that cannot carry SPDX headers
+# READMEs and other documentation files that are ugly to carry SPDX headers
 [[annotations]]
 path = [
   "README.md",
   "MLSYS.md",
-  "Bender.lock",
   "experiments/multicast/README.md",
   "hw/axi_obi/Readme.md",
 ]
 SPDX-FileCopyrightText = "2025 ETH Zurich and University of Bologna"
 SPDX-License-Identifier = "SHL-0.51"
+
+# Project tool version configuration files that cannot carry SPDX headers
+[[annotations]]
+path = [
+  "Bender.lock",
+  ".python-version",
+  "uv.lock",
+]
+SPDX-FileCopyrightText = "2025 ETH Zurich and University of Bologna"
+SPDX-License-Identifier = "SHL-0.51"
diff --git a/experiments/__init__.py b/experiments/__init__.py
diff --git a/experiments/picobello/__init__.py b/experiments/picobello/__init__.py
@@ -0,0 +1,5 @@
+# Copyright 2025 ETH Zurich and University of Bologna.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+from .picobello import *
diff --git a/experiments/picobello.py → experiments/picobello/picobello.py b/experiments/picobello.py → experiments/picobello/picobello.py
@@ -9,7 +9,7 @@
 import snitch.util.experiments.experiment_utils as eu
 from snitch.util.experiments import common
 
-root = Path(__file__).resolve().parents[1]
+root = Path(__file__).resolve().parents[2]
 default_work_dir = root / 'target/sim/vsim'
 hw_cfg = root / 'cfg/snitch_cluster.json'
 

diff --git a/iis-env.sh b/iis-env.sh
@@ -6,19 +6,11 @@
 export VSIM="questa-2023.4 vsim"
 export VOPT="questa-2023.4 vopt"
 export VLIB="questa-2023.4 vlib"
-export BASE_PYTHON=/usr/local/anaconda3/bin/python3.11
 export CHS_SW_GCC_BINROOT=/usr/pack/riscv-1.0-kgf/riscv64-gcc-12.2.0/bin
 export VERIBLE_FMT="oseda -2025.03 verible-verilog-format"
 export SN_LLVM_BINROOT=/usr/scratch2/vulcano/colluca/tools/riscv32-snitch-llvm-almalinux8-15.0.0-snitch-0.5.0/bin
 
-# Create the python venv
-if [ ! -d ".venv" ]; then
-  make python-venv
-fi
+bender checkout
 
-# Activate the python venv only if not already active
-if [ -z "$VIRTUAL_ENV" ] || [ "$VIRTUAL_ENV" != "$(realpath .venv)" ]; then
-  source .venv/bin/activate
-fi
-
-export PYTHONPATH=$PWD/experiments/:$PYTHONPATH
+/usr/local/uv/uv sync --locked
+source .venv/bin/activate
diff --git a/pyproject.toml b/pyproject.toml
@@ -0,0 +1,52 @@
+# Copyright 2025 ETH Zurich and University of Bologna.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+[project]
+name = "picobello"
+version = "0.1.0"
+description = "whatever it means"
+readme = "README.md"
+requires-python = ">=3.11"
+
+dependencies = [
+    "floogen>=0.8.0",
+    "peakrdl>=1.5.0",
+    "peakrdl-rawheader>=0.2.4",
+    "snitch[kernels]",
+    "cheshire"
+]
+
+[dependency-groups]
+dev = [
+    "reuse>=6.2.0",
+]
+
+[tool.uv.workspace]
+members = [
+    # To locally edit floogen, run `bender clone floo_noc` and add:
+    #   "working_dir/floo_noc",
+    # Note: .deps/floo_noc cannot be used here because uv_build does not
+    # support symlinks as workspace members (https://github.com/astral-sh/uv/issues/15243).
+    ".deps/snitch_cluster",
+    ".deps/cheshire",
+]
+
+[tool.uv.sources]
+# To locally edit floogen, also uncomment:
+#   floogen = { workspace = true, editable = true }
+snitch = { workspace = true, editable = true }
+cheshire = { workspace = true }
+torch = [{ index = "pytorch-cpu" }]
+
+[[tool.uv.index]]
+name = "pytorch-cpu"
+url = "https://download.pytorch.org/whl/cpu"
+explicit = true
+
+[build-system]
+requires = ["uv_build>=0.6,<1"]
+build-backend = "uv_build"
+
+[tool.uv.build-backend]
+module-root = "experiments"