diff --git a/docs/STATUS.md b/docs/STATUS.md new file mode 100644 index 0000000..92fb2af --- /dev/null +++ b/docs/STATUS.md @@ -0,0 +1,223 @@ +# MetalOS - Implementation Summary + +## Project Overview + +MetalOS is a minimal, from-scratch operating system designed to boot directly into a single QT6 Hello World application on AMD64 hardware with a Radeon RX 6600 GPU via UEFI. + +**Key Philosophy**: +- Minimal implementation - only what's needed for QT6 +- No command line or shell - boots directly to the app +- Creative freedom for OS components, precision for hardware drivers +- Single application focus + +## Current Status: Phase 1 Complete ✅ + +### What's Been Implemented + +#### 1. Project Structure +``` +MetalOS/ +├── bootloader/ # UEFI bootloader (skeleton) +├── kernel/ # Minimal kernel (skeleton) +├── userspace/apps/ # QT6 Hello World application +├── docs/ # Comprehensive documentation +└── scripts/ # Build and utility scripts +``` + +#### 2. Documentation (7 files, ~1400 lines) +- **README.md**: Project introduction and quick start +- **ARCHITECTURE.md**: System design and component overview +- **BUILD.md**: Build instructions and prerequisites +- **DEVELOPMENT.md**: Development workflow and coding standards +- **ROADMAP.md**: Detailed phase-by-phase implementation plan +- **COMPONENTS.md**: Component checklist and TODO tracking +- **CONTRIBUTING.md**: Contribution guidelines + +#### 3. Bootloader Skeleton +- **Files**: 3 source files, 2 headers +- **Features**: + - UEFI type definitions + - Boot information structure + - Entry point stub (efi_main) + - Linker script for UEFI + - Makefile for building + +**TODO**: Implement actual UEFI protocol calls, graphics init, kernel loading + +#### 4. Kernel Skeleton +- **Files**: 2 source files, 2 headers +- **Features**: + - Kernel entry point (kernel_main) + - Basic framebuffer console with text output + - Boot info structure + - Linker script for kernel + - Makefile for building + +**TODO**: Memory management, interrupts, drivers, scheduler + +#### 5. QT6 Application Template +- **Files**: hello_world.cpp, hello_world.pro +- **Features**: + - Full-screen QT6 Hello World app + - Simple label-based UI + - Ready for porting to MetalOS + +**TODO**: Port QT6 to MetalOS, create QPA plugin + +#### 6. Build System +- **Files**: 4 Makefiles, 1 shell script +- **Features**: + - Separate builds for bootloader and kernel + - Main Makefile orchestrates everything + - Image creation script (requires xorriso) + - QEMU testing targets + +**TODO**: Create actual bootable image when components are ready + +## Statistics + +- **Total Lines**: ~2187 +- **Source Files**: 8 (C/C++/headers) +- **Documentation**: 7 markdown files +- **Build Files**: 5 +- **Directories**: 19 + +## Design Highlights + +### 1. Single Application Boot +The system boots directly into the QT6 Hello World app with no shell or init process: + +``` +UEFI → Bootloader → Kernel → QT6 App (full screen) +``` + +No command line interface is provided or needed. + +### 2. Minimal Everything +- No file system (app embedded in boot image) +- No networking +- No multi-user support +- No POSIX compatibility +- Single core, single process +- Static linking only + +### 3. Hardware Specific +Optimized for: +- **CPU**: AMD64 (x86-64) +- **GPU**: Radeon RX 6600 (Navi 23) +- **Boot**: UEFI only (no legacy BIOS) + +### 4. Clear Separation +- **Creative OS Design**: Memory management, scheduling, etc. - custom implementations +- **Precise Hardware Drivers**: GPU, PCI, USB - must follow actual hardware specs + +## Next Steps (Phase 2) + +### Immediate Priorities: +1. **UEFI Bootloader Implementation** + - Console I/O for debugging + - Graphics Output Protocol + - File system access + - Kernel loading + - Memory map retrieval + +2. **Kernel Improvements** + - GDT/IDT setup + - Basic interrupt handling + - Physical memory allocator + - Improved console output + +3. **Testing Infrastructure** + - Ensure code compiles with cross-compiler + - Test in QEMU with OVMF + - Add debug logging + +### Long-term Goals: +- Phase 3-4: Complete kernel and HAL (especially GPU driver) +- Phase 5-6: System calls and user space support +- Phase 7: QT6 port (biggest challenge) +- Phase 8: Integration and testing on real hardware + +## Technical Challenges Ahead + +### Major Challenges: +1. **GPU Driver**: Radeon RX 6600 initialization is complex + - Need to study Linux amdgpu driver + - Register programming must be precise + - Display pipeline configuration + +2. **QT6 Port**: Significant work required + - QT Platform Abstraction (QPA) plugin + - Dependencies (zlib, freetype, libpng, etc.) + - Event loop integration + - Input handling + +3. **Memory Management**: Need working virtual memory + - Page table setup + - Kernel/user space separation + - Memory allocators + +4. **USB Stack**: For keyboard/mouse input + - XHCI controller (modern USB) + - HID class drivers + - Or fallback to PS/2 + +### Mitigation: +- Incremental development and testing +- Use QEMU extensively before hardware +- Reference (but don't copy) Linux kernel +- Keep scope minimal at each phase + +## Resources Required + +### Development Tools: +- GCC cross-compiler (x86_64-elf-gcc) +- NASM assembler +- GNU Make +- QEMU with UEFI support (OVMF) +- GDB for debugging + +### Hardware (for final testing): +- AMD64 system +- Radeon RX 6600 GPU +- USB keyboard/mouse +- USB drive for booting + +### Knowledge Areas: +- UEFI specification +- x86-64 architecture (GDT, IDT, paging) +- PCI/PCIe bus +- AMD GPU architecture +- USB protocol (XHCI/HID) +- QT6 internals and QPA + +## Success Criteria + +### Minimal Success: +- ✅ Boots from UEFI +- ✅ Displays text via GPU +- ✅ Loads and runs QT6 app +- ✅ Responds to keyboard input + +### Full Success: +- ✅ Reliable boot on target hardware +- ✅ Full HD (1920x1080) rendering +- ✅ Smooth QT6 widget rendering +- ✅ Responsive mouse/keyboard input +- ✅ Boot time under 10 seconds +- ✅ Clean, professional appearance + +## Conclusion + +Phase 1 is complete with a solid foundation: +- ✅ Clear architecture and design +- ✅ Project structure in place +- ✅ Comprehensive documentation +- ✅ Skeleton code for all major components +- ✅ Build system framework + +The project is ready for Phase 2 (UEFI Bootloader implementation) and beyond. + +--- + +**MetalOS** - Proving that a minimal, purpose-built OS can run modern GUI applications.