Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/diohabara/chisel_riscv
RISC-V CPU Core
https://github.com/diohabara/chisel_riscv
chisel3 cpu riscv
Last synced: 21 days ago
JSON representation
RISC-V CPU Core
- Host: GitHub
- URL: https://github.com/diohabara/chisel_riscv
- Owner: diohabara
- License: unlicense
- Created: 2021-09-06T12:01:22.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2023-09-01T03:08:36.000Z (over 1 year ago)
- Last Synced: 2023-09-03T03:05:57.823Z (over 1 year ago)
- Topics: chisel3, cpu, riscv
- Language: Scala
- Homepage:
- Size: 165 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# chisel_riscv
## Setup
```bash
direnv allow .
```
## Build
Develop inside [Devcontainer](https://code.visualstudio.com/docs/devcontainers/containers)
or
use Dockerfile
```bash
docker build . -t riscv/mycpu
docker run -it -v $PWD/mycpu:/mycpu riscv/mycpu
```
or
use existing image
```bash
docker pull yutaronishiyama/riscv-chisel-book
docker run -it -v $PWD/mycpu:/mycpu yutaronishiyama/riscv-chisel-book
```
## Format
```bash
scalafmt
```
## Test
In Docker
### Basic test
Change file path of Memory.scala
```bash
cd /mycpu
sbt "testOnly fetch.HexTest"
sbt "testOnly decode.HexTest"
sbt "testOnly lw.HexTest"
sbt "testOnly sw.HexTest"
```
### `riscv-tests`
change the starting address in `/opt/riscv/riscv-tests/env/p/link.ld`:
```bash
SECTIONS
{
. = 0x00000000; // from 0x80000000
...
}
```
Run the following commands:
```bash
cd /opt/riscv/riscv-tests
autoconf
./configure --prefix=/src/target
make
make install
```
ELF and dump files will be generated in `/src/target/share/riscv-tests/isa/`. We will be using
- `rv32ui-p-` (for user-level instructions)
- `rv32um-p-` (for machine-level instructions)
Convert ELF file into BIN files:
```bash
mkdir /mycpu/src/riscv
cd /mycpu/src/riscv
riscv64-unknown-elf-objcopy -O binary /src/target/share/riscv-tests/isa/rv32ui-p-add rv32ui-p-add.bin
od -An -tx1 -w1 -v rv32ui-p-add.bin >> rv32ui-p-add.hex
```
Run
```bash
sbt "testOnly riscvtests.RiscvTest"
```
Automate making `hex` files
```bash
cd /mycpu/src/shell
./tohex.sh
./riscv_tests.sh
```
The results will be in `mycpu/results`
### test with C
compile C code
```bash
cd /mycpu/src/c
riscv64-unknown-elf-gcc \
-march=rv32i \ # specify ISA
-mabi=ilp32 \ # specify ABI
-c \ # compile only, not link
-o ctest.o ctest.c
```
link it
```bash
riscv64-unknown-elf-ld -b elf32-littleriscv ctest.o -T link.ld -o ctest
riscv64-unknown-elf-objcopy -O binary ctest ctest.bin
od -An -tx1 -w1 -v ctest.bin > ../hex/ctest.hex
riscv64-unknown-elf-objdump -b elf32-littleriscv -D ctest > ../dump/ctest.elf.dmp
```
test it
```bash
cd /mycpu
sbt "testOnly ctest.HexTest"
```
### Branch hazard
compile `br_hazard`
```bash
cd /mycpu/src/c
make br_hazard
```
```bash
cd /mycpu
sbt "testOnly pipeline.HexTest"
sbt "testOnly pipeline_brhazard.HexTest"
```
### Data hazard
compile `hazard_wb`
```bash
cd /mycpu/src/c
make hazard_wb
```
```bash
cd /mycpu
sbt "testOnly pipeline_datahazard.HexTest"
```
### RISC-V tests
```bash
cd /mycpu/src/shell
./riscv_tests.sh pipeline_datahazard 09_pipeline_datahazard
```
## References
-
-