KbcEmul

Index: 0209
Size: 14,532 bytes (38C4h)
Phase: SMM (DXE_SMM_DRIVER)
Source Package: AmiModulePkg\KbcEmulation\KbcEmul

Overview

SMM-based Keyboard Controller (KBC) emulation driver. Emulates legacy PS/2 keyboard controller functionality (ports 0x60/0x64) from within SMM context on platforms that lack a physical KBC (e.g., Intel Purley server platforms). Traps IO accesses to the legacy KBC IO ports via SMI and provides emulated responses for keyboard, mouse, and AUX device commands. Includes a DXE counterpart (KbcEmulDxe) for boot-time initialization. Has a .reloc section for runtime relocation.

Key Functions

• ModuleEntryPoint -- Main entry: calls sub_4E8 init, then sub_628 for KBC emulation setup
• sub_4E8 -- UEFI driver init: caches ImageHandle, SystemTable, BootServices, RuntimeServices
• sub_628 -- Core KBC emulation: registers SMI IO trap handlers for ports 0x60/0x64
• sub_1F94 / sub_360 -- KBC emulation notification cleanup/teardown callbacks
• sub_2074 -- Debug ASSERT handler referencing AutoGen.c

Protocols

• EFI_SMM_SYSTEM_TABLE2 for SMM services
• EFI_SMM_CPU_IO2 protocol for IO trap registration
• EFI_SMM_BASE2_PROTOCOL
• Legacy 8042/Keyboard controller emulation interfaces

Platform

HR650X (Purley), built from AmiModulePkg\KbcEmulation, DEBUG VS2015 X64