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README.md	Restructure the repo	2 days ago
TxtDxe.c	Recovering names (well, look still has huge cleanups)	2 days ago
TxtDxe.h	Recovering names (well, look still has huge cleanups)	2 days ago
TxtDxe.md	Restructure the repo	2 days ago

TxtDxe

Index: 0064 | Size: 31168 bytes | Arch: x64 | Phase: DXE

Overview

Intel Trusted Execution Technology (TXT / LaGrande Technology) DXE driver for Purley/CoffeeLake Xeon platforms. Manages measured launch by locating the BIOS Authenticated Code Module (ACM) address from platform HOBs, setting up MTRRs and machine check banks, launching the ACM in a special environment, and handling ACM errors. Installs the TXT DXE Protocol for SMM and boot script coordination.

Key Functions

TxtDxeLaunchBiosAcm -- Disables MC banks, sends SIPI to APs, calls assembly ACM launch, restores state
PlatformLaunchBiosAcm -- Assembly-level ACM launch wrapper configuring GDT/IDT/MTRRs/MCG
HandleAcmError -- Decision tree for ACM errors: ignore, clear LT/TPM CMOS state, or trigger reset
ConfigureMachineCheckBanks -- Saves/restores IA32_MC9-MC11 CTL and MCG_CONTAIN for ACM launch
InstallTxtDxeProtocol -- Installs TXT DXE protocol into UEFI protocol database

Protocols / Dependencies

TXT Device Memory Policy HOB, TXT Platform Policy HOB
MP Services Protocol (AP management and APIC ID table)
SMM Communication Protocol, SMM Base2 Protocol, SMM LockBox Protocol
MM PCI User Access Protocol, PCD Protocol

Platform

HR650X, Intel TXT (Server TXT), BIOS ACM launch, LCP policy data, SINIT memory region management