IioCfgUpdateDxeCLX64L

Function Table

Address	Name	Description
	ReadIioSocketConfig
	UbaDebugPrint
	CompareGuid
	RegisterIioPlatformConfig
	IioCfgUpdateDxeEntry
Global	caches for UEFI Boot/Runtime services and protocol pointers.
These	are populated by the entry point and used by helper functions.
EFI_BOOT_SERVICES	*gBS;
Cached	protocol pointers for UBA debug and UBA IIO configuration.
Initialized	on first use, then reused for subsequent calls.
UBA_DEBUG_PROTOCOL	*mUbaDebugProtocol = NULL; ///< Located by GetUbaDebugProtocol()
CMOS	register 0x4B stores the socket configuration type.
volatile	UINT8 mSocketConfig;
IIO	Platform Configuration Block for CLX64L (Cascade Lake)
This	data block is registered under each of the four sub-system GUIDs.
The	values represent platform-specific IIO configuration parameters.
Structure	layout:
IIO_PLATFORM_CONFIG_BLOCK	mIioPlatformConfig = {
Return	cached protocol if already located.
if	(mUbaDebugProtocol != NULL) {
Check	the HOB list size as a platform sanity check.
The	number of HOB entries should be <= 0x10 for this platform.
HobList	= (EFI_HANDLE)gBS->GetHobList ();
HOB	list exceeds expected size; protocol lookup is skipped.
return	NULL;
Locate	the UBA debug protocol.
Status	= gBS->LocateProtocol (
Protocol	not available; cache NULL to avoid repeated lookups.
mUbaDebugProtocol	= NULL;
Cache	the protocol pointer for subsequent calls.
mUbaDebugProtocol	= Protocol;
GUID	definitions for the UBA debug protocol.
EFI_GUID	gUbaDebugProtocolGuid = UBA_DEBUG_PROTOCOL_GUID;
Read	CMOS register 0x4B with NMI mask preserved.
CmosValue	= IoRead8 (RTC_ADDRESS_REGISTER);
Decode	the socket configuration.
if	(SocketType > 3) {
If	CMOS value is out of expected range, check hardware register.
If	SocketType is 0, fall through to hardware register check.
if	(SocketType == 0) {
Read	chipset configuration at fixed MMIO address 0xFDAF0490.
Bit	1 indicates socket topology (0 = dual-socket, 1 = single-socket).
SocketType	**= (MmioRead8 (0xFDAF0490) & 0x02)	0x01;**
Get	the cached UBA debug protocol.
Protocol	= GetUbaDebugProtocol ();
Read	the socket configuration to select the appropriate debug mask.
SocketType	= ReadIioSocketConfig ();
Valid	socket type: set default multi-socket mask.
DebugMask	**= 0x80000006; // DEBUG_ERROR	0x6 (platform-specific mask)**
Only	print if the requested debug level matches the current mask.
if	((DebugMask & DebugLevel) != 0) {
Read	both QWORD halves of each GUID for comparison.
Use	unaligned reads since GUID pointers in HOB entries may not be aligned.
return	*(ReadUnaligned64 ((UINT64 )Guid1) == ReadUnaligned64 ((UINT64* )Guid2)) &&**
GUID	for the HOB Memory Allocation Module entry.
EFI_GUID	gHobMemoryAllocModuleGuid = MEMORY_ALLOC_MODULE_HOB_GUID;
Return	cached HOB entry if already located.
if	(mHobEntry != NULL) {
Initialize	cache to NULL to detect lookup failures.
Get	HOB list information from the System Table.
SystemTable	+ 104 = HobListSize (UINTN)
SystemTable	*+ 112 = HobListStart (EFI_PHYSICAL_ADDRESS )**
HobListSize	*= (UINTN* )((UINT8 )gST + 104);*
HOB	list is empty. This indicates a system configuration error.
DEBUG	((DEBUG_ERROR, "\nASSERT_EFI_ERROR (Status = %r)\n", EFI_INVALID_PARAMETER));
Walk	the HOB list to find a matching GUID entry.
HobListStart	*= (EFI_PHYSICAL_ADDRESS* )((UINT8 )gST + 112);*
Found	the matching HOB entry; cache and return it.
The	entry data starts at Hob + 16 (after GUID and header).
mHobEntry	*= (VOID )((UINT8* )Hob + 16);**
No	matching HOB entry found.
ASSERT	(mHobEntry != NULL);
GUIDs	for the UBA IIO Configuration Database protocol and sub-system blocks.
UBA	IIO Config Protocol: {E03E0D46-5263-4845-B0A4-58D57B3177E2}
EFI_GUID	gUbaIioConfigProtocolGuid = UBA_IIO_CONFIG_PROTOCOL_GUID;
IIO	sub-system configuration GUIDs
EFI_GUID	gIioConfigSubGuid1 = IIO_CONFIG_SUBGUID_1; // {6FE6C559-4F35-4111-98E1-332A251512F3}
Print	trace message indicating IIO config update for CLX64L.
UbaDebugPrint	(DEBUG_VERBOSE, "UBA:IioCfgUpdate-TypeClx64L\n");
Locate	the UBA IIO Configuration Database protocol.
Protocol	not available on this platform.
return	Status;
Register	the IIO platform configuration block under each sub-system GUID.
The	same configuration block is registered four times, once per sub-system.
Each	call uses the protocol's SetData function with size 48 bytes.
Status	= UbaIioConfigDb->SetData (&gIioConfigSubGuid1, &mIioPlatformConfig, sizeof (mIioPlatformConfig));
The	UefiBootServicesTableLib constructor sets:
gImageHandle	= ImageHandle
gST	= SystemTable
gBS	= SystemTable->BootServices
The	UefiRuntimeServicesTableLib constructor sets:
gRT	= SystemTable->RuntimeServices
Each	pointer is validated against NULL with ASSERT.
Walk	the System Table's HOB database to locate the memory allocation
module	HOB entry (gEfiHobMemoryAllocModuleGuid).
HobList	= GetHobList (ImageHandle);
HOB	list not found - system configuration error.
An	ASSERT will have already been triggered inside GetHobList().
return	EFI_NOT_FOUND;
Locate	the UBA IIO Configuration Database protocol and register the
Status	= RegisterIioPlatformConfig ();

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