refactor(bus): Clean up AXI/TL-UL bridges and tests

This commit refactors the AXI-to-TileLink and TileLink-to-AXI bridge
logic and cleans up the associated test infrastructure.

Key changes:
- Simplified the ready signal logic in `Axi2TLUL.scala` for better
  clarity and correctness.
- Moved the cocotb test files for the AXI/TL-UL bridges from
  `hdl/chisel/src/bus` to a dedicated `tests/cocotb/tlul` directory.
- Reorganized the Bazel BUILD files to reflect the new test locations
  and improve dependency management.
- Added minor delays at the end of the `tlul2axi` tests to facilitate
  easier waveform debugging.

Change-Id: I9a2a3c6510d34b010e0ecc2ba1da1db3e1462f2b
5 files changed
tree: 126e67a850338811ada1742451acf848e9af47e0
  1. doc/
  2. examples/
  3. external/
  4. fpga/
  5. hdl/
  6. hw_sim/
  7. kelvin_test_utils/
  8. lib/
  9. platforms/
  10. rules/
  11. tests/
  12. third_party/
  13. toolchain/
  14. utils/
  15. .bazelrc
  16. .bazelversion
  17. .gitignore
  18. CONTRIBUTING.md
  19. LICENSE
  20. PREUPLOAD.cfg
  21. README.md
  22. WORKSPACE
README.md

Kelvin

Kelvin is a RISC-V32IM core with a custom instruction set.

Kelvin block diagram

More information on the design can be found in the overview.

Getting Started

  • If you are hardware engineer looking to integrate Kelvin into your design, check out our integration guide.
  • If you are a software engineer looking to write code for Kelvin, start with this tutorial.

Building

Kelvin uses bazel as it's build system. The Verilated simulator for Kelvin can be generated using:

bazel build //tests/verilator_sim:core_sim

The verilog source for the Kelvin core can be generated using:

bazel build //hdl/chisel/src/kelvin:core_cc_library_emit_verilog

Verilog source for the Matcha SoC can be generated using:

bazel clean --expunge  # To generate the ToT sha
bazel build //hdl/chisel:matcha_kelvin_verilog