SpsPei

Overview

Server Platform Services (SPS) PEI module. Initializes and manages the Management Engine (ME) during the PEI phase by determining the boot path (S3 vs non-S3), waiting for ME firmware initialization, and negotiating the ME-BIOS interface version. Handles Node Manager (NM) power policies, sends END_OF_POST during S3 resume, configures ICC clocks, and performs pre-DID resets.

Key Functions

• SpsPeiEntryPoint: Main dispatch (detects SPS firmware, reads boot mode)
• SpsS3Path: S3 resume path (waits for ME, END_OF_POST, clock config)
• PpiNotifyHeciReady: Non-S3 path (HECI ready notification)
• GetMeSpsPolicy: SPS policy PPI retrieval
• Ppi registration for gHeci1PpiGuid and gSpsPolicyPpiGuid

Dependencies

• ME Firmware HOB (gMeFwHobGuid)
• SPS Info / Policy HOBs (gSpsInfoHobGuid, gSpsPolicyHobGuid)
• HECI1 PPI (gHeci1PpiGuid)
• DebugLib, HobLib, BaseMemoryLib, IoLib, TimerLib, PcdLib

Platform

• Arch: IA32 (PE32)
• Image Base: 0xFFDA3630
• Source: e:\hs\PurleySktPkg\Me\Sps\Pei\SpsPei.c
• SHA256: 7d55998a6e8977b296c0fa58200f4e02d0c947e7e8b5f752c08bacb7e39bd48b
• Toolchain: VS2015 DEBUG