LnvDxeStatusCode

Index: 0274 | Size: 6.0 KB | Phase: DXE | Arch: X64

Overview

Lenovo-specific DXE status code driver that bridges UEFI status code reports to a custom Lenovo Status Code Protocol. Reports status codes filtered by a CMOS-controlled severity mask, forwards ASSERT failures via the Lenovo protocol, and handles virtual address change and ExitBootServices transitions for runtime operation. Registers protocol notifications and manages runtime/boot-time conversion of protocol pointers.

Key Functions

• LnvDxeStatusCodeEntryPoint (0x10D0): Entry point -- saves gImageHandle, locates HOB list, registers protocol notify events for ExitBootServices and VirtualAddressChange
• ReportStatusCodeFiltered (0x14A8): Reads CMOS debug level from index 0x4B, builds a severity filter mask, and forwards matching status codes to the Lenovo protocol
• LocateRuntimeStatusCodeProtocol (0x168C): Locates the protocol via gBS->LocateProtocol with pool allocation
• OnExitBootServicesClearBs / OnExitBootServicesConvertLenovo / OnVirtualAddressChange: Event callbacks that manage protocol pointer conversion for runtime phase

Protocols/Dependencies

• Lenovo Status Code Protocol (custom GUID 0x3000)
• gEfiStatusCodeRuntimeProtocolGuid (0x3010, from MdeModulePkg)
• gEfiHobListGuid, gEfiEventExitBootServicesGuid, gEfiEventVirtualAddressChangeGuid
• CMOS RTC (I/O ports 0x70/0x71) for debug level read at index 0x4B

Platform

Lenovo HR650X. Lenovo-specific status code forwarding with CMOS-controlled debug severity filtering.