Milestones

This sections collects all completed milestones with their tasks and descriptions.

🚀 Milestone 0 – Bootloader

• Boson UEFI loader and ELF loading
• Setup kernel page tables (identity + higher-half mapping)
• Setup kernel stack and call C entry point

🏗️ Milestone 0.1 – Foundations

• UART serial logging driver (output)
• Global Descriptor Table
• Interrupt Descriptor Table
• Exception handlers (page fault, GPF, etc.)

📗 Milestone 0.2 – Memory Management

• Physical frame allocator (bitmap allocator)
• Virtual memory mapping (paging interface)
• Kernel heap allocator (buddy allocator)
• Page Fault verbose handler

🕹️ Milestone 0.3 – Interrupts and Timing

• Interrupt Routing (PIC disable, local APIC configuration)
• IOAPIC configuration (VMM mapping and MMIO setup)
• UART serial interrupt-based driver (input)
• HPET timer for LAPIC timer calibration
• Local APIC timer for event scheduling

🐎 Milestone 0.4 – Kernel mode scheduler (cooperative round-robin)

• Task/Thread structure with context and stack
• Preemptive context switch via timer interrupt
• FPU context save and restore
• Process functions create(), start() and terminate()/exit()
• Cooperative task yield() function
• sleep_ms() and suspend()/resume() functions
• wait() and detach() functions
• Synchronization primitives via Semaphore object
• Basic shell to launch programs