The ACPI Component Architecture Project

The ACPI Component Architecture (ACPICA) project provides an operating system (OS)-independent reference implementation of the Advanced Configuration and Power Interface Specification (ACPI). It can be easily adapted to any host OS. The ACPICA code is meant to be directly integrated into the host OS, as a kernel-resident subsystem. Hosting the ACPICA requires no changes to the core ACPICA code. However, it does require a small OS-specific interface layer, which must be written specifically for each host OS.

The complexity of the ACPI specification leads to a lengthy and difficult implementation in OS software. The purpose of the ACPI Component Architecture is to simplify ACPI implementations for operating system vendors (OSVs) by providing major portions of an ACPI implementation in OS-independent ACPI modules that can be easily integrated into any OS.

News

The implementation of ACPI 4.0 support within ACPICA is underway, and will be released in stages over the next few months.