PcdDxe

Field	Value
Index	258
Module	PcdDxe
File	PcdDxe.efi
PE format	PE32+
Size (hex)	4EA4h
Size (bytes)	20,132
Subsystem	EFI Boot Service (000Bh)
Sections	6 (.text, .rdata, .data, section_3, .xdata, .reloc)
Phase	DXE
Source	MdeModulePkg/Universal/PCD/Dxe
Build	HR6N0XMLK, DEBUG_VS2015, X64

Overview

This module implements the DXE-phase PCD (Platform Configuration Database) infrastructure, derived from the edk2 MdeModulePkg. It provides get/set operations for PCD values, NV storage backing for non-volatile PCDs, dynamic SKU variant support, and notification callbacks for PCD value changes. The driver maintains separate PEI-phase and DXE-phase PCD databases and handles token lookup via GUID tables and size tables.

Key Functions

PcdDxeInitDatabase -- initializes the PCD database from PEI HOB and DXE FV sections
PcdGet32 / PcdSet32 -- get and set 32-bit PCD values by token number
PcdGetEx64 / PcdSetEx64 -- get and set 64-bit extended PCD values by GUID + token
PcdSetNvStoreDefault -- writes default NV storage data for non-volatile PCDs
Callback table management for PCD value change notifications
SKU variant support for platform-specific PCD values

Dependencies

PEI-phase PCD database (GUID HOB)
DXE-phase PCD database (from Firmware Volume)
UEFI Boot Services
DebugLib

Platform

Intel/AMD64 UEFI, Lenovo HR650X BIOS