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retroSoC/ATTRIBUTIONS.md
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maksyuki 0e36b6a82f feat: introduce RV64 support and related tooling for HP workloads
- Added build_hp_rtthread.py for building the RT-Thread kernel with RV64 support.
- Updated build_hp_smoke.py to target RV64 architecture and modified output filenames.
- Modified generate_vexiiriscv.py to reflect RV64 configuration and memory management.
- Created hp_tools.py for shared utilities related to RV64 builds.
- Enhanced package_hp_boot.py to package RV64 workloads and updated versioning.
- Implemented run_hp_sim.py for executing and validating HP workloads with specific markers.
- Developed setup_hp_rtthread.py for installing RT-Thread source and environment setup.
- Updated GenerateRetroSocHp.scala to generate RV64 application cores.
- Enhanced tests for HP boot bundles, platform specifications, and tool utilities to accommodate RV64 changes.
- Adjusted test cases to validate new workload types and ensure compatibility with RV64 architecture.
2026-09-26 15:47:26 +08:00

4.7 KiB

Third-party attribution

The optional HP RT-Thread kernel is official RT-Thread v5.3.0, commit 99428a1e7f7447955aa860f7c969273a12095b8f, from RT-Thread/rt-thread. It is licensed under Apache-2.0. Its original copyright/license files remain in the locked managed checkout; only the retroSoC BSP is repository-owned. Redistribution of built RT-Thread images must retain the applicable upstream notices.

This repository contains RTL source files that retain copyright and attribution information from third-party open-source projects in their original file headers. The following projects are explicitly referenced in the RTL sources currently present in this repository.

1. ETH Zurich and University of Bologna

Several RTL files retain the original copyright notice from ETH Zurich and University of Bologna, including files under the following paths:

  • rtl/managed/clusterip/**
  • rtl/managed/mpw/core/username7/ibex/**
  • rtl/tech/tc_clk.sv
  • rtl/ip/memory/opipsram_phy.sv
  • rtl/ip/memory/opipsram_trx.sv
  • rtl/tech/tc_opipsram_delay.sv

The tc_clk.sv header and the adapted OPI PSRAM PHY files state the Solderpad Hardware License, Version 0.51 (SHL-0.51). The OPI PSRAM PHY files are adapted from PULP Platform HyperBus v0.0.4 at commit 80de8df600edc5d7956a94c9d42f911d6e61efd7; each preserves the source-file authors and records retroSoC's modifications. The exact license text is in licenses/PULP_Platform-SHL-0.51.

2. Ravenna / PicoRV32 in ASIC

The following RTL files retain the original header from the Ravenna example SoC project, which refers to a design using PicoRV32 in ASIC:

  • rtl/ip/peripheral/gpio.sv
  • rtl/ip/peripheral/timer.sv
  • rtl/ip/serial/uart.sv

The preserved notice attributes the work to Clifford Wolf and Tim Edwards.

3. Hirosh Dabui

The SDRAM controller implementation in rtl/ip/memory/sdram_core.sv retains the original copyright notice attributed to Hirosh Dabui.

4. EmbedFire

Several SPI SD card related RTL files retain the original attribution to EmbedFire and refer to source files such as sd_init.v, sd_write.v, sd_read.v, and data_rw_ctrl.v:

  • rtl/ip/storage/spisd_core.sv
  • rtl/ip/storage/spisd_data.sv
  • rtl/ip/storage/spisd_init.sv
  • rtl/ip/storage/spisd_read.sv
  • rtl/ip/storage/spisd_write.sv

These headers state that the original code was published on GitHub by EmbedFire, but that the original license was not specified in the retained header.

5. Device simulation models

The simulation-only models under rtl/model/ retain their upstream notices and source formatting. The AT24 model is imported from the retroSoC I2C repository, the microphone model from the retroSoC I2S repository, and the W25Q128JVxIM model from the retroSoC SPI repository. The Winbond model retains its original Winbond Electronics Corporation copyright and "All Rights Reserved" notice; its inclusion does not relicense it under Mulan PSL v2.

6. Notes on redistribution

The optional checksum-locked SKY130 SRAM artifact is generated with OpenRAM at the revision recorded in its manifest. OpenRAM is distributed under the BSD 3-Clause License; the SkyWater-provided SRAM build-space used by the generator is distributed under Apache License 2.0. The artifact retains both exact license texts and is materialized only below the ignored .cache/ tree.

The preserved third-party notices are included to maintain attribution for code that was adapted or reused in this repository. They do not replace the repository's main license declaration. The retroSoC project itself is distributed under the Mulan PSL v2 license.

7. Typst publication diagram packages

The manual publication builder uses these checksum-locked third-party packages. Their original sources and notices remain in the verified package caches.

Package Authors License Original text
bytefield 0.0.8 Jomaway https://github.com/jomaway MIT Exact license
rivet 0.3.1 Louis Heredero https://git.kb28.ch/HEL Apache-2.0 Exact license
blockcell 0.1.0 @daleione MIT Exact license
circuiteria 0.2.1 Louis Heredero https://git.kb28.ch/HEL Apache-2.0 Exact license
cetz 0.3.4 Johannes Wolf https://github.com/johannes-wolf; fenjalien https://github.com/fenjalien LGPL-3.0-or-later Exact license
tidy 0.3.0 Mc-Zen https://github.com/Mc-Zen MIT Exact license
oxifmt 0.2.1 PgBiel https://github.com/PgBiel MIT-0 Exact license