Firmware Interface
ACPI defines a large number of tables that provide the interface between an ACPI-compliant operating system, and system firmware. For example:
- DSDT – Differentiated System Description Table
- SSDT – Secondary System Description Table
- SRAT – System Resource Affinity Table
The tables allow description of system hardware in a platform-independent manner, and are presented as either fixed-formatted data structures or in AML. The main AML table is the DSDT (differentiated system description table).
The Root System Description Pointer is located in a platform-dependent manner, and describes the rest of the tables.
Read more about this topic: Advanced Configuration And Power Interface