yasnakateb / pipelinedarm

💎 A 32-bit ARM Processor Implementation in Verilog HDL

PipelinedARM

The Arm architecture is a family of reduced instruction set computing (RISC) architectures for computer processors. In this project, a 32-bit pipelined ARM processor is implemented in Verilog HDL.

The overall architecture

Implementation

Stages

ARM pipeline has five stages, with one step per stage:

• IF: Instruction fetch from memory.

• ID: Instruction decode & register read.

• EX: Execute operation or calculate address.

• MEM: Access memory operand.

• WB: Write result back to register.

Each stage takes in data from that buffer, processes it and write into the next buffer. Also note that as an instruction moves down the pipeline from one buffer to the next, its relevant information also moves along with it.

Instructions

Instruction Mnemonic	Definition
MOV	Move
MVN	Move NOT
ADD	Add
ADC	Add with Carry
SUB	Subtract
SBC	Subtract with Carry
AND	Logical AND
ORR	Logical OR
EOR	Exclusive OR
CMP	Compare
TST	Test
LDR	Load Register
STR	Store Register
B	Branch

Dependencies

macOS

This project needs Icarus-Verilog and a VCD viewer.

Building on macOS

1. Icarus-Verilog can be installed via Homebrew : $ brew install icarus-verilog

2. Download Scansion from here.

3. Clone the repository.

4. Run $ make and type MIPS code to see it in binary form in rams_init_file.hex file.

5. $ make simulate will:

• compile design+TB
• simulate the verilog design

6. $ make display will:

• display waveforms.

Links

1. ARM Instruction Set
2. Introduction to ARM Instructions (azeria labs)

TODO

• ⭕ Add more instructions