CrystalRidge

Overview

CrystalRidge is a PEI module that manages nonce restoration for the Intel CrystalRidge security co-processor on Purley platforms. It registers an EndOfPei notification callback that generates a Software SMI (via IO port 0xB2/0xFB) to trigger nonce restoration in the CrystalRidge firmware. The module also provides low-level memory utility functions (memset, memmove, strided memory set) for the PEI environment.

Key Functions

• CrystalRidgePeimEntry — PEIM entry point; registers EndOfPei notify for nonce restoration
• GenerateSwSmiForNonceRestore — EndOfPei callback; triggers SW SMI 0xFB via IO port 0xB2
• LocateCrystalRidgePpi — locate the CrystalRidge PPI interface
• CrystalRidgeDebugPrint — debug output via CrystalRidge PPI
• Memset, Memmove, Memset32, SetMem32Strided — memory manipulation utilities

Dependencies

• CrystalRidge PPI (gCrystalRidgeGuid)
• PEI Services Table
• PEI Boot Mode detection

Platform

Lenovo HR650X (Intel Purley), X64, UEFI PEI module (13 functions)