ucb-bar/chipyard

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An Agile RISC-V SoC Design Framework with in-order cores, out-of-order cores, accelerators, and more

Stars: 2.4k
Forks: 920
Open beginner issues: 0
Indexed issues: 157
Avg merge: 3d 1h
Merged PRs (30d): 5

Dominant language: Scala
License: BSD-3-Clause
Last GitHub push: Sep 13, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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157 open issues indexed

build-setup.sh pins sysroot_linux-64 to the host glibc without checking it exists Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

ucb-bar/chipyard#2373 · 2 comments · Opened Aug 26, 2026
Verilator simulator warning text incorrect Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

ucb-bar/chipyard#2354 · 2 comments · Opened Jun 26, 2026
Cannot get verbose commit log output from Dromajo+BOOM cosimulation Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2332 · Opened Apr 24, 2026
CHIPYARD - LargeBOOMV3 - LINUX image Boot - Verilator Open

enhancement

ucb-bar/chipyard#2328 · 1 comment · 2 assignees · Opened Mar 6, 2026
Documentation still references the firrtl tool which is depricated Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ucb-bar/chipyard#2324 · Opened Feb 20, 2026
Incorrect CSR State Override Logic Causes Spike State Rollback on RMW Instructions Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2320 · Opened Jan 9, 2026
[Sky130 + OpenROAD Tutorial make buildfile error] Open

bug

ucb-bar/chipyard#2311 · 1 comment · 1 assignee · Opened Nov 2, 2025
TSI/FESVR memory loading failure - PutPartial Assertaion failed Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2308 · 1 comment · Opened Oct 23, 2025
[Sky130 + OpenROAD Tutorial error ], Open

bug

Difficulty 5/5 Over a week Newbie friendliness 20/100

ucb-bar/chipyard#2306 · Opened Oct 19, 2025
TestchipIP's bootrom.S documentation and code mismatch - _hang never execute due to linker placement. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ucb-bar/chipyard#2305 · Opened Oct 13, 2025
Building riscv-pk fails to get environment Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ucb-bar/chipyard#2300 · Opened Sep 18, 2025
Read-Write Conflict in Dual-Port BTB SRAM Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2277 · Opened Aug 20, 2025
Memory Access Deadlock Induced by Prefetcher in D-Cache Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#2276 · 1 comment · Opened Aug 20, 2025
The system starts up particularly slowly,Copying data from the SD card is particularly slow. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2274 · Opened Aug 7, 2025
Failure booting linux and running JTAG on VCU118 using OpenOCD + GDB Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ucb-bar/chipyard#2269 · 1 comment · Opened Jul 15, 2025
nvdla simulate nvdla.c on verilator failed Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#2265 · Opened Jun 26, 2025
[Shuttle][FireSim][VCU118] Dual-core Shuttle FireSim br-base Workload Hangs on Boot Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#2264 · Opened Jun 19, 2025
Documentation refers to deprecated TLManagerParameters Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 45/100

ucb-bar/chipyard#2252 · Opened May 9, 2025
Cospike reference model behavior differs with BOOM in MISA register Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2251 · Opened May 6, 2025
Assertion failed: *** FAILED *** (exit code = 5)when run-binary-debug file.riscv Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ucb-bar/chipyard#2244 · Opened Apr 22, 2025
Mismatch in CoSpike co-simulation about WLRL CSR registers Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2243 · Opened Apr 22, 2025
Encoutered kernel bug when running spec2017 Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#2239 · Opened Apr 17, 2025
The `segmentation fault` is encountered when running the RTL simulation Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ucb-bar/chipyard#2238 · 2 comments · Opened Apr 17, 2025
encountering soft lockup when boot linux on 32+ cores FPGA design Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2236 · 1 comment · Opened Apr 14, 2025
Caliptra AES Arbiter Open

bug

Difficulty 5/5 Over a week Newbie friendliness 10/100

ucb-bar/chipyard#2208 · Opened Mar 10, 2025
Chisel 7 Support Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#2205 · 3 comments · Opened Mar 6, 2025
hartid in chipletConfig Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

ucb-bar/chipyard#2204 · 1 comment · Opened Mar 4, 2025
Question about Transmitting an executable binary to FPGA via Serial port Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 15/100

ucb-bar/chipyard#2151 · 1 comment · Opened Dec 12, 2024
basic design fail to meet timing and a really slow booting linux on VCU118 Open

bug

Difficulty 5/5 Over a week Newbie friendliness 20/100

ucb-bar/chipyard#2119 · 8 comments · Opened Nov 8, 2024
Error: Failed to make rmapats.so Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2091 · 2 comments · Opened Oct 21, 2024
Numpy-1.26.4-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl is not a supported wheel on this platform Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ucb-bar/chipyard#2080 · 1 comment · Opened Oct 12, 2024
FireSim doesn't work with cloned configs + CloneLazyModule caveats Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ucb-bar/chipyard#2076 · 1 comment · Opened Oct 8, 2024
firesim debug：using config (Rocket chip+custom Axi4 Peripheral) on fpga, segmentation faullt occurs when accessing Specific peripheral address Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2062 · Opened Sep 26, 2024
Sky130 + openroad documentation doesn't work Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 20/100

ucb-bar/chipyard#2059 · Opened Sep 23, 2024
The current default IOBinder for Debug Module does not punch out the ndreset (and hartResetReq)? Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2048 · 5 comments · Opened Sep 15, 2024
How to export my custom IO signals at RocketTile module to DigitalTop's IO? Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2046 · 2 comments · Opened Sep 14, 2024
Error while executing "make buildfile CONFIG=GemminiRocketConfig tutorial=sky130-openroad" Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2035 · 2 comments · Opened Sep 7, 2024
How to Add a prefix at every module name when generating system verilog? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 15/100

ucb-bar/chipyard#2033 · 1 comment · Opened Sep 6, 2024
VLSI Flow broken for OpenRoad+Sky130 on chipyard 1.11.0 or above? Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#2017 · Opened Aug 26, 2024
Verilator simulations can be made an order of magnitude faster Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

ucb-bar/chipyard#2000 · 3 comments · Opened Aug 13, 2024
Program runs extremely slow on VCU118 for larger testcases Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#1992 · Opened Aug 11, 2024
Error while running the coremark on largeBoomcore in chipyard Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#1989 · 1 comment · Opened Aug 9, 2024
RoCC Punch Trough Signal Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

ucb-bar/chipyard#1987 · 6 comments · Opened Aug 9, 2024
ASAP7 + OpenRoad. ERROR: Can't open ABC output file. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#1936 · 3 comments · Opened Aug 1, 2024
Tutorial for sky130+openroad vlsi fails due to unbounded memory usage Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#1934 · 2 comments · Opened Jul 30, 2024
Bare Metal VCU118 capability (similar to Arty100T) and Update to VCU118 documentation Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#1889 · 4 comments · Opened May 29, 2024
Verilator simulation (RocketConfig default example) crashes on MacOS Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

ucb-bar/chipyard#1886 · 4 comments · Opened May 28, 2024
Segfault running SimNetwork under verilator Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ucb-bar/chipyard#1885 · 11 comments · Opened May 24, 2024
SD Card interfaces times-out on the VCU118 (3 April 2024 commit) Open

bug

ucb-bar/chipyard#1875 · 6 comments · 1 assignee · Opened May 9, 2024
IBex on VCU118 is not working (Probably bootrom issue) Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

ucb-bar/chipyard#1867 · Opened Apr 30, 2024

ucb-bar/chipyard

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