Just another attempt at OS development

I need refactoring, huh.

What works

• SMP:
  • APs are started up using InitIPI/SIPIs
  • LAPIC config
  • LAPIC timer for each processor
  • Per-CPU scheduling queues
• Multitasking
• Userspace stuff with a simple libc
• Readonly (yet) AHCI and IDE ATA controller drivers
• I/O APIC configuration:
  • 8259 PIC -> I/O APIC mapping
  • Trigger/polarity config from MADT table (for 8259 IRQs)
• PCI:
  • Device enumeration
  • PCI-to-PCI bridge support
  • Resolve INTA#/INTB#/INTC#/INTD# pin routing
• ACPI:
  • Integrated ACPICA into the kernel. Only singlethreaded access, synchronization not implemented yet
  • PCI Interrupt Link Devices (_SB_.LNKx/GSIx) for dynamic PCI IRQ mapping
  • Hard IRQ routes (for chipsets where there's no IRQ router and PCI traces are hardwired)
  • Shutdown works (Sleep state 5)