SlotDataUpdateDxeLightningRidgeEXECB3

Function Table

Address	Name	Description
	GetPlatformType
	PlatformPassthrough
	UbaDebugPrint
	UbaAssert
	CompareGuidQwords
	ReadUnaligned64
	SlotDataUpdateEntryPoint
Global	Variables (EFI System Table globals, matched to BootServicesTableLib)
The	EFI image handle for this driver.
Stored	from ImageHandle parameter of ModuleEntryPoint.
The	EFI System Table pointer for this driver.
Stored	from SystemTable parameter of ModuleEntryPoint.
The	EFI Boot Services Table pointer, cached from SystemTable->BootServices.
The	EFI Runtime Services Table pointer, cached from SystemTable->RuntimeServices.
Cached	HOB list pointer from the EFI Configuration Table.
Found	by scanning ConfigurationTable for EFI_HOB_LIST_GUID.
Cached	UBA HOB Database Protocol interface pointer.
Retrieved	via gBS->LocateProtocol() on first access.
Global	Data: PSLT Structure Templates and HOB Output Buffers
EFI_HOB_LIST_GUID	value stored for Configuration Table comparison.
Used	by GetHobListFromConfigTable() to find the HOB list in the
System	Table's ConfigurationTable array.
GUID	for the UBA HOB Database Protocol.
Used	with gBS->LocateProtocol() to find the HOB database interface.
GUID	for the PSLT (Platform Slot Table) HOB entry (40-byte output).
GUID	for the variant HOB entry (32-byte output).
Output	buffer for the variant HOB query (32 bytes).
Receives	slot table data from the first HOB GUID query.
Contains	PSLT header data with platform-specific slot configuration.
Output	buffer for the extended PSLT HOB query (40 bytes).
Contains	PSLT header plus additional slot data.
Same	PSLT header as gSlotTableData (32 bytes)
Extended	data at offset +0x20
Function	Implementations
Platform	type 2 = Lightning Ridge EX EC B3
return	2;
Simple	identity function - return the input value
return	Value;
Return	cached protocol if already found
if	(gUbaHobProtocol != NULL) {
TPL	guard: only locate protocol if current TPL <= TPL_NOTIFY (16)
Raise	to TPL_HIGH_LEVEL (31) to check, then restore
OldTpl	= gBootServices->RaiseTPL (TPL_HIGH_LEVEL);
Locate	the UBA HOB Database Protocol
The	debug print function at offset +0x08 in the protocol has signature:
UINTN	*()(UINTN DebugLevel, CONST CHAR8* Format, VA_LIST Args)**
It	uses a debug flags mask: if (DebugFlags & DebugLevel) is non-zero
the	message is printed. Otherwise it is supressed.
DebugFlags	= 0x80000004; ///< Default mask: allow INFO and ERROR levels
Call	protocol debug function (UINT64 function pointer at offset +0x08
to	match x64 calling convention padding)
Result	*= ((UINT64 ()(VOID* , UINTN, CONST CHAR8 , VA_LIST))*
Log	assert with UBA debug protocol
UbaDebugPrint	(
Deadloop	- CPU will spin here forever
This	matches the original decompiled behavior
while	(TRUE) {
Return	cached HOB list if already found
if	(gHobList != NULL) {
Get	Configuration Table info from SystemTable
SystemTable	+ 0x68 = NumberOfTableEntries
SystemTable	+ 0x70 = ConfigurationTable pointer
gHobList	= NULL;
No	configuration table entries - this is an error
Log	assert and enter deadloop
Walk	the Configuration Table entries looking for EFI_HOB_LIST_GUID
Each	entry is 24 bytes: GUID(16) + Interface pointer(8)
for	(Index = 0; Index < TableEntryCount; Index++) {
Calculate	current entry address (24 bytes per entry)
VOID	Entry = (UINT8 )ConfigTable + (Index * 24);
Check	if this entry's GUID matches EFI_HOB_LIST_GUID
Compare	by splitting both GUIDs into two 8-byte halves
if	*(CompareGuidQwords (Entry, &gEfiHobListGuid, (UINT8 )&gEfiHobListGuid + 8)) {**
Found	the HOB list - cache the interface pointer at offset +0x10
gHobList	*= (VOID** )((UINT8 )Entry + 16);*
If	HOB list was not found, ASSERT
if	(gHobList == NULL) {
Read	unaligned QWORDs from both entries
EntryQword0	= ReadUnaligned64 (EntryAddr);
Both	halves must match
return	(BOOLEAN)(EntryQword0 == TemplateQword0 && EntryQword1 == TemplateQword1);
NULL	pointer check (asserts and deadloops if NULL)
if	(Buffer == NULL) {
Read	8 bytes unaligned
return	(volatile UINT64 )Buffer;
PHASE	1: Initialize EFI Service Pointers
Save	ImageHandle - required for UEFI driver registration
NULL	check via ASSERT (from UefiBootServicesTableLib)
gImageHandle	= ImageHandle;
Save	SystemTable pointer
NULL	check via ASSERT
gSystemTable	= SystemTable;
Cache	Boot Services table pointer
gBootServices	= SystemTable->BootServices;
Cache	Runtime Services table pointer
gRuntimeServices	= SystemTable->RuntimeServices;
PHASE	2: Initialize HOB List Access
Locate	the HOB list from the System Table Configuration Table
This	is needed for subsequent HOB queries
GetHobListFromConfigTable	();
PHASE	3: Platform Identification
Print	platform identifier string for UBA framework debugging
PHASE	4: Query UBA HOB Protocol for Slot Data
This	protocol provides access to platform-specific HOBs
Status	= gBootServices->LocateProtocol (
Query	variant HOB (32-byte output buffer)
This	retrieves platform slot table variant data that defines
the	PCIe slot configuration for this specific board revision.
Status	= UbaHobProtocol->GetNextGuidHob (
Query	PSLT HOB (40-byte output buffer)
This	retrieves extended slot table data with additional

Generated by HR650X BIOS Decompilation Project