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Another RISC-V ISA simulator.

This code is suitable to hard refactor at any time

This is another RISC-V ISA simulator, this is coded in SystemC + TLM-2. It partially supports RV32I Instruction set by now.

Brief description of the modules:

CPU: Top entity that includes all other modules.
Memory: Memory highly based on TLM-2 example with read file capability
Registers: Implements the register file, PC register & CSR registers
RISC_V_execute: Executes ISA instructions
Instruction: Decodes instruction and acces to any instruction field
Simulation: Top-level entity that builds & starts the simulation

Current performance is about 284500 instructions / sec in a Core-i5@2.2Ghz

Helper classes:

Performance: Performance indicators stores here (singleton class)
Log: Log class to log them all (singleton class)

Structure

TODO

This is a preliminar and incomplete version.

Task to do:

Implement all missing instructions (RISC_V_execute)
Implement CSRs (where?)
Add full support to .elf ~~and .hex~~ filetypes to memory.h (only partial .hex support)
Connect some TLM peripherals
- ~~Debug module similiar to ARM's ITM~~
- Some standard UART model
- ...
Test, test, test & test. I'm sure there are a lot of bugs in the code
Improve structure and modules hierarchy
Add 64 & 128 bits architecture (RV64I, RV128I)

compile

In order to compile the project you need SystemC-2.3.2 installed in your system. Just change SYSTEMC path in Makefile.

$ make

Then, you need to modifiy your LD_LIBRARY_PATH environtment variable to add path systemc library. In my case:

$ export LD_LIBRARY_PATH=/home/marius/Work/RiscV/code/systemc-2.3.2/lib-linux64

And then you can execute the simulator:

$ ./RISCV_TLM asm/BasicLoop.hex

Test

In the asm directory there are some basic assembly examples.

I "compile" one file with the follwing command:

$ cd asm
$ riscv32-unknown-linux-gnu-as  EternalLoop.asm -o EternalLoop.o
$ riscv32-unknown-linux-gnu-ld -T ../my_linker_script.ld EternalLoop.o -o EternalLoop.elf
$ objcopy -O ihex EternalLoop.elf EternalLoop.hex
$ cd ..
$ ./RISCV_SCTLM asm/EternalLoop.hex

This example needs that you hit Ctr+C to stop execution.

Documentation

The code is documented using doxygen. In the doc folder there is a Doxygen.cfg file ready to be used.

Contribute

There are several ways to contribute to this project:

Test
Pull request are welcome (see TODO list)
Good documentation

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

3.1 KiB Raw Blame History