How to generate Microcode FMP from Microcode TXT file

Copy directory UefiCpuPkg/Feature/Capsule/MicrocodeUpdateTxt to <Your Platform Package>/MicrocodeUpdateTxt
Copy microcode TXT file to<Your Platform Package>/MicrocodeUpdateTxt/Microcode
Uncomment and update statement in [Sources] section of <Your Platform Package>/MicrocodeUpdateTxt/Microcode/Microcode.inf with name of Microcode TXT file copied in previous step.
[Sources]

Uncomment and update FILE DATA statement in <Your Platform Package>/MicrocodeUpdateTxt/MicrocodeCapsuleTxt.fdf with path to a Microcode MCB file. The MCB file is placed in $(WORKSPACE)/$(OUTPUT_DIRECTORY)/$(TARGET)_$(TOOL_CHAIN_TAG)/IA32/<Your Platform Package>/MicrocodeUpdateTxt/Microcode/Microcode/OUTPUT/.

FILE DATA = <your Microcode MCB file path>

Uncomment and update PLATFORM_NAME, FLASH_DEFINITION, OUTPUT_DIRECTORY section in <Your Platform Package>/MicrocodeUpdateTxt/MicrocodeCapsuleTxt.dsc with .

PLATFORM_NAME                  = <Your Platform Package>
FLASH_DEFINITION               = <Your Platform Package>/MicrocodeCapsuleTxt/MicrocodeCapsuleTxt.fdf
OUTPUT_DIRECTORY               = Build/<Your Platform Package>

Uncomment and update statement in Components section of <Your Platform Package>/MicrocodeUpdateTxt/MicrocodeCapsuleTxt.dsc with path to a Microcode INF file.

[Components]
<Your Microcode INF file>

Use EDK II build tools to generate the Microcode FMP Capsule

build -p <Your Platform Package>/MicrocodeCapsuleTxt/MicrocodeCapsuleTxt.dsc

The generated Microcode FMP Capsule is found at $(WORKSPACE)/$(OUTPUT_DIRECTORY)/$(TARGET)_$(TOOL_CHAIN_TAG)/FV/MicrocodeCapsule.Cap