Fábio Coutada bafa872415 refactor(kernel): rewrite Stage 1 kernel in C++

- Rename kernel.c -> kernel.cpp and uart.c -> uart.cpp
- Add universalisos::uart namespace with constexpr register definitions
- Use extern "C" linkage for kernel_main() called from boot.S
- Compile with arm-none-eabi-g++ using C++17 freestanding flags
  (-fno-exceptions, -fno-rtti, -fno-threadsafe-statics, -fno-use-cxa-atexit)
- Update Makefile to use g++ and .cpp build rules

2026-07-06 22:53:50 +01:00

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Universalisos - Type-1 Hypervisor Foundation

Universalisos is our safety-critical type-1 hypervisor foundation for cyber-physical systems, created from zero based on PikeOS architecture. This project imports the complete PikeOS ecosystem to serve as the reference architecture and codebase for Aurelio cyber-physical brain development.

Strategic Objectives

Type-1 Hypervisor: Safety-critical embedded systems foundation
AUTOSAR C++ Compliance: MISRA C++, MISRA C, DAL-B, DAL-A (avionics), ISO26262
Aurelio Integration: PikeOS codegen workflow → Aurelio implementation patterns
IP-XACT Architecture: Agent components as IP Cores with standard interfaces
Airship Control Foundation: Type-1 hypervisor for cyber-physical simulation control

Repository Structure

universalisos/
├── kernel/       # Universalisos type-1 hypervisor implementation (C)
├── src/          # PikeOS source code import
├── test/         # PikeOS test framework source code
├── docs/         # Complete PDF documentation
├── ide/          # Eclipse-based IDE source code (XSD → C generation)
├── xsd/          # XSD schema files for C/C++ code generation
└── README.md     # This file

Project Status

Current Phase: Stage 1 — Bare-Metal Hypervisor Skeleton

The PikeOS 5.0 ecosystem import is complete. Active work now focuses on the Universalisos type-1 hypervisor itself, starting with a bootable bare-metal skeleton for QEMU ARM virt.

Development Environment Setup

See BUILD_ENVIRONMENT.md for detailed setup instructions.

Required Toolchains:

GCC cross-compilers (ARM, target architectures)
CMake and Ninja build systems
AUTOSAR build tools and code generation utilities
XSD processing tools and validators
Eclipse IDE for XSD workflow analysis

Documentation

BUILD_ENVIRONMENT.md - Development environment setup and build process
kernel/README.md - Stage 1 bare-metal kernel build/run guide
AURELIO_INTEGRATION.md - PikeOS → Aurelio integration plan
XSD_WORKFLOW_ANALYSIS.md - XSD → C code generation workflow
AUTOSAR_CPP.md - Safety-critical compliance analysis
COMPONENTS.md - Component categorization and architecture
HYPERVISOR.md - Type-1 hypervisor design documentation

Hypervisor Kernel (C)

The kernel/ directory contains the actual Universalisos type-1 hypervisor implementation, written in C++. Stage 1 is a bootable bare-metal skeleton for QEMU ARM virt:

cd kernel
make
make run

See kernel/README.md for details.

Source Material

Source Location: Nextcloud cloud.portugalfuturista.org/s/devmm-arch

Contents:

PikeOS source code
Test frameworks
PDF documentation
Eclipse IDE source code (XSD → C generation)
XSD schema files

Safety-Critical Standards

Universalisos follows strict safety-critical coding standards:

AUTOSAR C++: Automotive software architecture compliance
MISRA C++: Motor Industry Software Reliability Association guidelines
MISRA C: C programming compliance
DAL-B: Design Assurance Level B (avionics systems)
DAL-A: Design Assurance Level A (critical avionics systems)
ISO26262: Functional safety for road vehicles

License

MIT License - See LICENSE file for details

Integration with Ecosystem

Universalisos integrates with:

nervura-electrica: Infrastructure platform and hosting
replica-omnisciente: Agent orchestration and mega-brain foundation
Aurelio: Compiler, gateway, and cyber-physical brain platform

Note: This repository is actively being populated with PikeOS ecosystem content. Documentation and implementation details are being added incrementally during the import process.

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