Specifications

Code Definitions

3.1 Introduction

This section contains definitions of the following protocols, functions, or data types.

Table 10 EFICompatability Code and Compatabiloity16 code

EfiCompatibility Code:

EFI_LEGACY_BIOS_PROTOCOL

Used to abstract the traditional BIOS for EFI.

EFI_LEGACY_BIOS_PLATFORM_PROTOCOL

Used to abstract the platform-specific traditional

hardware and or policy decisions from the

generic EfiCompatibility code.

EFI_LEGACY_REGION_PROTOCOL

Used to abstract the hardware control of the

OpROM and Compatibility16 region shadowing.

EFI_LEGACY_8259_PROTOCOL

Used to abstract the 8259 PIC.

EFI_LEGACY_INTERRUPT_PROTOCOL

Used to abstract the PIRQ programming from the

generic code.

EFI_COMPATIBILITY16_TABLE

A new table introduced to the traditional legacy

runtime BIOS for CSM support. Provides the

physical address of the entry point for the

Compatibility16 functions.

EFI_COMPATIBILITY_FUNCTIONS

and the

Compatibility16 functions

Allows the EfiCompatibility code to communicate

with the Compatibility16 code and are an

addition to the traditional BIOS runtime code.