TpmSmbiosDxe

Function Table

Address	Name	Description
	TpmDxeTcgCallback
	TpmDxeTrEECallback
	CpuPause
	ReadTsc
	EnableInterrupts
	DisableInterrupts
	ReadEflags
	ReadUnaligned64
	AsciiStrLen
	IoWrite16
	IoRead32
	PciExpressBaseAddress
	CompareGuid
	IsTpm20
	Tpm2GetCapability
	TpmSmbiosPopulate
	GetTpmSupportHobData
	InternalFreePool
	DebugPrint
	DebugAssert
	InitializeTpmSmbios
	ModuleEntryPoint
	TpmSmbiosDxeEntry
GUID	Definitions
EFI_GUID	gEfiSmbiosProtocolGuid = { 0x0B30D3F9, 0xD8F0, 0x432A, { 0x90, 0x1C, 0x29, 0xC7, 0x41, 0x06, 0xA6, 0xE8 } };
Globals	from UEFI Boot/Runtime Services Table Library
EFI_HANDLE	gImageHandle = NULL;
Module	Global Variables (mapped from .data section)
and	should be renamed as understanding of their purpose improves.
The	ImageHandle passed to the driver entry point (saved for later use).
The	SystemTable pointer (saved for module-internal use).
The	BootServices pointer (extracted from SystemTable).
The	RuntimeServices pointer (extracted from SystemTable).
TPM	Vendor ID (from TPM capabilities).
TPM	Specification Version: Major (LO byte), Minor (HI byte).
TPM	Firmware Version 1.
TPM	Firmware Version 2.
TPM	Characteristics flags (bitfield).
OemDefined	value.
TPM	2.0 vendor string length.
TPM	Vendor ID to Name Lookup Table
Indexed	*by 12-byte entries: VendorId (UINT32), NamePointer (CHAR8)**
TPM_VENDOR_ID_MAP	VendorIdMap[17] = {
0x2C8C	{ 0x49465820, "Infineon" }, // 0x2C98: 0x49465820 (IFX\0)
0x2CB0	{ 0x534C4230, "SLB0" }, // 0x2CBC
0x2CC8	{ 0x53545320, "STM" }, // 0x2CD4: 0x53545320 (STS\0)
0x2CE0	{ 0x57454320, "WEC" }, // 0x2CEC: 0x57454320 (WEC\0)
0x2CF8	(duplicate)
0x2D10	{ 0x4D534654, "MSFT" }, // 0x2D1C
0x2D28	{ 0x4E544300, "NTC" }, // 0x2D34 (duplicate)
TPM	Device ID comparison table (address 0x2D50).
Used	by IsTpm20() to compare device IDs at FED40000.
UINT64	qword_2D50[3];
SMBIOS	protocol pointer (queried via gBS->LocateProtocol).
UINTN	qword_2D60 = 0;
TrEE	protocol pointer.
UINTN	qword_2D68 = 0;
UINTN	qword_2D70 = 0;
TPM	support HOB data pointer (retrieved from HOB list).
UINTN	qword_2D78 = 0;
Debug	library output protocol (for DebugPrint/DebugAssert).
UINTN	qword_2DA0 = 0;
UINTN	qword_2DA8 = 0;
HOB	list pointer.
UINTN	qword_2DB0 = 0;
PCI	Express memory-mapped base address.
UINTN	qword_2DB8 = 0;
TPM	2.0 GET_CAPABILITY response buffer at 0x2DD0.
UINT64	qword_2DD0[2];
TPM2	GET_CAPABILITY response buffer at 0x2EF0.
UINT64	qword_2EF0[2];
TCG	notification callback context.
UINT64	qword_2FF0[2];
TPM	1.2 GET_CAPABILITY response buffer at 0x3000.
UINT8	unk_3000[26];
Protocol	registration keys (for gBS->RegisterProtocolNotify).
UINT64	unk_3100[2]; // TrEE registration
SMBIOS	registration
UINT64	n25 = 25;
n513	used as TPM2 firmware version indicator
UINT16	n513 = 513;
Forward	declaration of local helpers
Memory	operation wrappers
Src	= &Source[Length - 1];
Count	= Length;
Zero	the buffer in aligned 8-byte chunks, then the remainder
memset	*(Buffer, 0, 8 (Length >> 3));**
Unaligned	read / string length helpers
PciExpressLib	wrapper
HOB	list and TPM support HOB retrieval
TPM	HOB retrieval (raw HOB walk)
Walk	the HOB list from the end
Count	= (UINTN)HobStart;
Found	matching GUID	walk the HOB data entries
Entry	*= (INT16 )(HobPtr + 16);
TPM	1.2 / 2.0 detection
TPM	capability retrieval
Build	the TPM2_GET_CAPABILITY command buffer
tag	(big-endian TPM_ST_NO_SESSIONS needs byte swap)
commandSize	MSW
commandSize	LSW
property	count = 1
Submit	the command via the TCG protocol's HashLogExtendEvent
or	similar submit-to-tpm interface
Status	*= ((EFI_TCG_PROTOCOL )TpmProtocol)->SubmitCommand (**
qword_3010	= ((UINT32)((UINT16)ROL2**((UINT16)(qword_3010 >> 16), 8)	**
Copy	TPM info to output structure
CopyMem	(TpmInfo, &unk_3000, sizeof (unk_3000));
qword_2DE0	= ((UINT32)((UINT16)ROL2**((UINT16)(qword_2DE0 >> 16), 8)	**
CopyMem	(TpmInfo, &qword_2DD0, sizeof (unk_3000));
TCG	callback processing
Locate	the TCG protocol if not already found
if	(qword_2D70 == 0) {
Collect	TPM capability info (route to TPM 1.2 or 2.0 path)
if	(IsTpm20 ()) {
Extract	vendor ID and firmware version from capability response
VendorId	*= (UINT64* )&TpmInfoBuf;**
If	vendor ID is nonzero, populate TPM data
if	(!(VendorId >> 48)) {
Override	with raw
Determine	configuration type based on PCD settings
Check	PCD for platform-specific configuration flags
TcgProtocol	*= (void )GetPcdProtocol ();**
ConfigFirmware	*} else if (((EFI_PCD_PROTOCOL )TcgProtocol)->Get8 (215)) {**
ConfigOem	} else {
ConfigSoftware	}
Install	TCG protocol structure
n25	= 25;
Locate	TrEE protocol
if	(qword_2D68 == 0) {
Locate	another protocol (SMBIOS?)
Status	*= ((EFI_BOOT_SERVICES )qword_2D88)->LocateProtocol (**
Get	TPM support HOB data
HobStatus	= GetTpmSupportHobData ();
Query	TPM capability (capability size = 28 bytes at offset 0)
Populate	global TPM variables
dword_2EE2	*= (UINT32* )(TpmInfoBuf.Tpm12Data + 22);**
Determine	configuration type from PCD
PcdProtocol	*= (VOID )GetPcdProtocol ();**
ConfigFirmware	*} else if (((EFI_PCD_PROTOCOL )PcdProtocol)->Get8 (215)) {**
Set	TPM 1.2/2.0 flag
Install	TrEE protocol structure
TPM	SMBIOS table population
Notify	caller of progress
if	(SmbiosHandle != 0) {
Locate	SMBIOS protocol
SmbiosProtocol	*= (EFI_SMBIOS_PROTOCOL )qword_2D60;**
Only	proceed for SMBIOS 3.x and later
if	*(((EFI_SMBIOS_PROTOCOL )SmbiosProtocol)->MajorVersion <= 3 &&**
Scan	existing SMBIOS records for an existing TPM record (type 43)
SmbiosHandle2	= (EFI_SMBIOS_HANDLE)(-2);
Remove	existing TPM record
Status	= SmbiosProtocol->Remove (SmbiosProtocol, SmbiosHandle2);
Read	PCD settings for TPM characteristics
Determine	TPM version string
VendorIdStr	= "HON HAI";
vendor	string length from capability
Calculate	string lengths
VendorStringLen	= AsciiStrLen (TpmVersionStr);
Look	up vendor name from vendor ID
VendorIdStr	= VendorIdStr;
Allocate	and zero the table buffer
FinalTable	= InternalAllocatePool (EfiBootServicesData, FinalSize + 2);
Copy	TPM device info into the buffer
InternalCopyMem	(FinalTable, "TPM 2.0", byte_2C61);
Add	the SMBIOS record
Free	the allocated buffer
InternalFreePool	(FinalTable);
TPM	support HOB data retrieval
Walk	GUID HOB entries from SystemTable
HobData	*= (UINT8 )GetTpmSupportHob (**
PCD	protocol access
Memory	allocation helpers
Debug	output helpers
Read	debug level from CMOS
__outbyte	**(0x70, (__inbyte (0x70) & 0x80)	0x4B);**
Map	error level
if	(DebugLevel == 1) {
UEFI	boot/runtime services initialization
Save	globals
gImageHandle	= ImageHandle;
Initialize	HOB list
GetHobList	();
Read	PCI Express base address from PCD
qword_2DB8	*= (UINTN)((EFI_PCD_PROTOCOL )GetPcdProtocol ())->Get32 (5);**
If	PCI express is enabled, enable memory-mapped I/O
if	((INT8)PciExpressBaseAddress (1024068) >= 0) {
Save	interrupt state, disable interrupts, and perform TSC delay
InterruptsWereEnabled	= (ReadEflags () & 0x200) != 0;
Wait	for approximately 357 TSC ticks (short delay loop)
TimeoutTsc	= (StartTsc + 357) & 0x800000;
Restore	interrupt state
if	(InterruptsWereEnabled) {
Module	entry point
Save	ImageHandle for callback use
ImageHandle	= (UINTN)ImageHandle;
if	(gBS->LocateProtocol (&gEfiTrEEProtocolGuid, NULL, &qword_2D68) != EFI_SUCCESS) {
if	(gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, &qword_2D70) != EFI_SUCCESS) {

Generated by HR650X BIOS Decompilation Project