SlotDataUpdateDxeLightningRidgeEXECB2

Function Table

Address	Name	Description
	GetSlotCount
	UbaDebugPrint
	UbaDebugAssert
	ReadUnaligned64
	IsHobGuidMatch
	InstallSlotData
	_ModuleEntryPoint
GUID	Definitions
Global	Variables
Platform	Slot Data (PSLT entries embedded in .data section)
The	PSLT entries are stored statically in the .data section and registered
with	the UBA protocol during initialization. They define the PCIe slot layout
for	the LightningRidge EXEC B2 platform.
PSLT_HEADER	layout:
Offset	Size Field
0	4 Signature ("PSLT" = 0x544C5350)
4	4 Version (1)
8	4 TotalDataSize (total PSLT data size in bytes)
12	4 SlotCountFunc (RVA of GetSlotCount function)
16	4 Reserved (pad)
20	4 SlotDataFunc (RVA of GetSlotData function)
24	8 ConfigData (platform slot config flags)
Function	Implementations
Return	cached protocol if already located (lazy init check).
if	(gUbaProtocol != NULL) {
Allocate	a small test buffer to verify pool availability.
Size	31 = 0x1F bytes via gBS->AllocatePool (BootServices + 24).
This	is a probe to verify the UEFI memory system is operational.
Check	if AllocatePool succeeded by verifying it returned > 0x10.
if	(TestBufferSize <= 0x10) {
Locate	the UBA protocol using LocateProtocol (BootServices + 320 = 0x140).
Get	the UBA protocol interface (lazy init through cached result).
Uba	= UbaGetProtocolInterface ();
Read	platform type from RTC CMOS register 0x4B.
We	preserve bit 7 (NMI mask) of the address register.
PlatformType	= IoRead8 (0x70); // Read current CMOS address
Select	reg 0x4B, keep NMI mask
Read	platform type byte
Determine	debug routing based on platform type (N3).
if	(N3 > 3) {
N3	is in valid range > 3, use as-is (no remapping needed)
Platform	type 0: read hardware strap from memory-mapped IO.
0xFDAF0490	is the LPC/strap register. Bit 1 indicates the
platform	type. OR with 1 to ensure N3 is at least 1.
N3	= ((volatile UINT8 )0xFDAF0490 & 0x02)	0x01;**
else	N3 is 1, 2, or 3: use directly without remapping
Map	platform type to debug route value.
Valid	range: N3 - 1 <= 0xFD (check that N3 is not 0 after remap)
if	((UINT8)(N3 - 1) <= 0xFD) {
EFI_D_INFO	route
EFI_D_VERBOSE	route (N3 >= 2)
If	the debug level matches the routing mask, call UBA debug output.
if	((DebugRoute & Severity) != 0) {
UBA	protocol function index 0 (offset 0x00): DebugPrint
UbaDebugFunc	= (UBA_DEBUG_PRINT)(Uba->DebugPrint);
Get	the UBA protocol and call its assertion handler.
UBA	protocol function index 1 (offset 0x08) is the assert handler:
VOID	*()(UINT64 FileName, UINTN LineNumber, UINT64 Description)**
Read	each GUID as two 64-bit values (low and high halves)
and	compare. The ReadUnaligned64 wrapper includes NULL checking.
Guid1Low	*= ReadUnaligned64 ((CONST UINT64 )Guid1);**
Return	cached HOB list if already located.
if	(gHobList != NULL) {
SystemTable	+ 104 (0x68) = NumberOfTableEntries (UINTN)
SystemTable	*+ 112 (0x70) = ConfigurationTable (EFI_CONFIGURATION_TABLE )**
Total	entry size: 24 bytes
HobCount	*= (UINTN* )((UINT8 )gSystemTable + 104);*
Walk	the configuration table to find the DXE Services HOB entry.
for	(Index = 0; Index < HobCount; Index++) {
Found	the DXE Services HOB - cache its VendorTable pointer.
gHobList	*= (VOID** )(HobEntries + Index 24 + 16);*
DXE	Services HOB not found in config table - report error.
UbaDebugPrint	(0x80000000LL, "\nASSERT_EFI_ERROR (Status = %r)\n");
HobList	is still NULL after scanning all config entries.
This	triggers a CpuDeadLoop (via the UBA assert).
UbaDebugAssert	(
Print	debug banner identifying this module.
UbaDebugPrint	(0x80000000, "UBA:SlotDataUpdate-TypeLightningRidgeEXECB2\n");
Locate	the UBA protocol interface via LocateProtocol.
BootServices	+ 320 (0x140) = LocateProtocol
Registration	key: NULL
Status	= gBootServices->LocateProtocol (
UBA	protocol function at offset +0x10 (Register): SetData.
VOID	*Data, UINTN DataSize)
UbaRegister	= (UBA_REGISTER)(Uba->RegisterFunc);
Register	PSLT Entry 1: Primary slot table with GUID B93613E1-...
Status	= UbaRegister (
Register	PSLT Entry 2: Extended slot config with GUID 226763AE-...
Phase	1: Cache and validate global UEFI pointers
Save	ImageHandle globally and ASSERT if NULL.
gImageHandle	= ImageHandle;
Save	SystemTable globally and ASSERT if NULL.
gSystemTable	= SystemTable;
Save	BootServices pointer from SystemTable and ASSERT if NULL.
gBootServices	= SystemTable->BootServices;
Save	RuntimeServices pointer from SystemTable and ASSERT if NULL.
gRuntimeServices	= SystemTable->RuntimeServices;
Phase	2: Initialize HOB list from system table configuration
gEfiDxeServicesTableGuid	({7739F24C-93D7-11D4-...}) and caches
the	associated VendorTable pointer in gHobList.
GetHobList	();
Phase	3: Register platform slot data with UBA protocol
Status	= InstallSlotData ();

Generated by HR650X BIOS Decompilation Project