gEfiSmmSwapAddressRangeProtocolGuid

This protocol is used to abstract the swap operation of boot block and backup block of boot FV in SMM environment.
Include/Protocol/SmmSwapAddressRange.h

PROTOCOL Information

PROTOCOL's Guid Name	PROTOCOL's Guid
gEfiSmmSwapAddressRangeProtocolGuid	{ 0x67c4f112, 0x3385, 0x4e55, { 0x9c, 0x5b, 0xc0, 0x5b, 0x71, 0x7c, 0x42, 0x28 }}

Refer to Header File

MdeModulePkg/Include/Protocol/SmmSwapAddressRange.h