Overview
Advanced Configuration and Power Interface (ACPI) is an standard that OS can use to discover and configure computer hardware, to perform power management, and status monitoring. ACPI defines hardware abstractions between the device’s firmware (e.g. BIOS, UEFI), the hardware, and the OS
Multiple APIC Description Table (MADT)
The Multiple APIC Description Table (MADT) is an ACPI table which contains information about APICs and their configuration