AddressTranslationDsmMemRas

Field	Value
Index	266
Module	AddressTranslationDsmMemRas
File	AddressTranslationDsmMemRas.efi
PE format	PE32+
Size (hex)	20A4h
Size (bytes)	8,356
Subsystem	EFI Boot Service (000Bh)
Sections	5 (.text, .rdata, .data, section_3, .xdata)
Phase	DXE (SMM driver)
Source	PurleyPlatPkg/Ras
Build	HR6N0XMLK, DEBUG_VS2015, X64

Overview

This driver is a UEFI SMM (System Management Mode) driver for the Purley platform that provides Address Translation DSM (Direct Memory Store) error reporting functionality. It registers an SMI handler to handle memory error log queries from the OS, and installs a patched SSDT to expose the ACPI interface for Address Translation DSM. The driver manages SMRAM communication buffers, locates SMM protocols (SMM Base2, SMM Access2), and interfaces with the MemRas protocol for memory RAS event handling.

Key Functions

UefiBootServicesTableLibConstructor -- entry point; locates SMM Base2 and SMM Access2 protocols, enumerates SMRAM
SMI handler registration for Address Translation DSM error log queries
SSDT patching and installation for ACPI DSM interface
SMRAM communication buffer management (0x100-byte buffer)
MemRas protocol interface for memory RAS event handling
SMRAM range discovery via SmmAccess2->GetCapabilities

Dependencies

EFI_SMM_BASE2_PROTOCOL
EFI_SMM_ACCESS2_PROTOCOL
EFI_SMM_CPU_PROTOCOL
MemRas Protocol (platform-specific)
SMRAM (System Management RAM)
ACPI Table Protocol (SSDT installation)
UEFI Boot Services

Platform

Intel/AMD64 UEFI, Lenovo HR650X BIOS (Purley platform)