5038F34E-0774-47A0-A5EF-4B94AF1A43DA

Overview

This GUID-named DXE driver manages Intel Optane DC Persistent Memory Modules (DCPMM/NVDIMM) on the Lenovo HR650X platform. It provides protocols for NVDIMM firmware communication via SMBUS passthrough, namespace management (BTT block translation, PFN page mapping), AppDirect interleave set configuration, health monitoring, and CSV-formatted DIMM inventory export.

The module contains a comprehensive DCPMM management stack covering ACPI NFIT table parsing, NVDIMM label operations, firmware command dispatch, and DIMM configuration data read/write through the SMBUS interface (COM port I/O 0x3F8-0x3FD).

Key Functions

• DcpmmDriverSupported / DcpmmDriverStart / DcpmmDriverStop -- UEFI driver binding
• DcpmmFirmwareCommandDispatch -- NVDIMM firmware command execution
• NvdimmDeviceManagement -- NVDIMM device initialization and monitoring
• SmbusCommunication -- SMBUS protocol communication (I/O 0x3F8-0x3FD)
• DimmLabelOperations -- NVDIMM namespace label management
• DimmFwCmdPassthrough -- NVDIMM firmware command passthrough
• DimmConfigRead/Write -- NVDIMM configuration data access
• DimmHealthMonitoring -- DIMM health/status reporting
• NfitTableParsing -- ACPI NFIT table parsing for NVDIMM topology
• BttBlockTranslation -- Block Translation Table management
• PfnPageMapping -- Page Frame Number mapping
• UtilAlloc/Mem/Print -- Utility functions (memory, allocation, debug)

Dependencies

• UEFI Driver Binding Protocol
• ACPI NFIT (NVDIMM Firmware Interface Table)
• SMBUS protocol
• Intel DCPMM hardware specification
• NVDIMM Namespace specification (BTT, PFN)

Platform

Lenovo HR650X (x86_64, PE32+)