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

PROTOCOL Information

PROTOCOL's Guid Name	PROTOCOL's Guid
gEfiSwapAddressRangeProtocolGuid	{ 0x1259F60D, 0xB754, 0x468E, { 0xA7, 0x89, 0x4D, 0xB8, 0x5D, 0x55, 0xE8, 0x7E }}

Refer to Header File