stage0-pi3-bringup

Project Overview

This repository contains a comprehensive implementation of System-on-Chip (SoC) bring-up, specifically targeting the BCM2837 of the Raspberry Pi 3. The project demonstrates how to perform SoC bring-up from scratch, implementing all necessary components for system initialization and peripheral management.

Project Objectives

The project aims to illustrate:

• SoC Bring-up Process: Step-by-step implementation of the BCM2837 SoC initialization process
• MISRA C:2012 Best Practices: All C modules strictly adhere to MISRA C:2012 guidelines to ensure code safety and reliability
• Low-Level Assembly Programming: Assembly modules for boot and critical peripheral initialization
• ARM Cortex-A53 Architecture: Exploitation of ARM Cortex-A53 core-specific features

System Architecture

Target Hardware

• SoC: Broadcom BCM2837 (Raspberry Pi 3)
• CPU: Quad-core ARM Cortex-A53 64-bit
• Architecture: ARMv8-A

Core Components

1. Boot Sequence: Implementation of the boot process from system reset
2. Peripheral Initialization: Configuration and setup of primary peripherals
3. Memory Management: MMU setup and memory space management
4. Interrupt Handling: Interrupt management system

Code Structure

• Assembly Modules: Boot sequence handling and low-level hardware initialization
• MISRA-compliant C Modules: System functionality implementation following MISRA C:2012
• Header Files: Hardware register definitions and data structures
• Linker Scripts: Memory configuration and code layout

Technical Features

MISRA C:2012 Compliance

• Adherence to mandatory and advisory rules
• Safe and maintainable code
• Comprehensive documentation of deviations (if present)

Assembly Implementation

• Custom boot vector
• Stack pointer initialization
• System register configuration
• Critical peripheral setup

Usage

This project serves as an educational reference and template for:

• Embedded developers working with ARM SoCs
• Engineers interested in bare-metal system bring-up
• Students of embedded systems and ARM architectures
• Professionals requiring MISRA C:2012 compliant code

Development Notes

The project is structured to be easily comprehensible and modifiable, with particular emphasis on code documentation and explanation of fundamental SoC bring-up concepts.