ARM LEGv8 CPU

This repository contains the source code for an ARM LEGv8 CPU written in Verilog.

Supported instructions include: LDUR, STUR, ADD, SUB, ORR, AND, CBZ, B, and NOP.

This CPU is based on the ARM architecture from the textbook: Computer Organization and Design: The Hardware/Software Interface ARM Edition by D. Patterson and J. Hennessy, Morgan Kaufmann, 2016 ISBN: 978-012-8017333

Versions

• Single-Cycle: Simulates an ARM LEGv8 single-cycle CPU

• Pipelined-Only: Simulates an ARM LEGv8 multi-cycle/pipelined CPU

• Pipelined with Hazard Detection and Forwarding Unit: Simulates an ARM LEGv8 multi-cycle/pipelined CPU with hazard detection and forwarding capabilities

Assembler

legv8_asm.py is an assembler that converts ARM LEGv8 assembly into machine code (binary and hex).

Example

Enter an ARM LEGv8 Instruction: LDUR x10 [x1, #10]

------- C Interpretation -------
Register[10] = RAM[ Register[1] + 10 ]

------- Machine Code (32-bits) -------
BINARY : 11111000010000001010000000101010
HEX    : f840a02a

To Simulate

There are two ways to run and simulate the projects below. Either use the Xilinx Vivado or an online tool called EDA Playground.

Option 1. Xilinx Vivado

• Run the Xilinx Vivado Suite with the module and testbench files for each project. More instructions can be found here.

Option 2. EDA Playground

• Login with a Google or Facebook account to save and run modules and testbenches
• Testbench + Design: SystemVerilog/Verilog
• Tools & Simulators: Icarus Verilog 0.9.7

Credits

• Ralph Quinto
• Nikita Eisenhauer

License

All source code in ARM-LEGv8 are released under the MIT license. See LICENSE for details.