SlotDataUpdateDxeLightningRidgeEXRP

Function Table

Address	Name	Description
	GetSlotCount
	GetSlotData
	UbaDebugPrint
	UbaDebugAssert
	ReadUnaligned64
	IsHobGuidMatch
	InstallSlotData
	SlotDataUpdateDxeEntryPoint
GUID	Definitions (stored in .rdata section)
EFI_GUID	gUbaProtocolGuid = UBA_PROTOCOL_GUID;
Global	Variables
EFI_HANDLE	gImageHandle = NULL; ///< 0xBF8: Image handle from entry point
Platform	Slot Data (embedded in .data section)
Two	PSLT entries are defined statically and registered with the UBA protocol
during	initialization.
PSLT	Entry 1 (at 0xBB0, 40 bytes):
PSLT	Entry 2 (at 0xBD8, 32 bytes):
The	function pointers at offsets 16 and 32 within Entry 1, and offset 16
within	Entry 2, are IMAGE_REL_BASED_DIR64 fixups applied by the PE loader
at	runtime to relocate from RVA to absolute address.
PSLT	Entry 1 (at 0xBB0, size 40): Primary PSLT with GetSlotCount + GetSlotData
PSLT	Entry 2 (at 0xBD8, size 32): Secondary PSLT with GetSlotCount only
Function	Implementations
LightningRidge	EXRP platform has exactly 2 slots.
return	2;
Pass	through the default slot data unchanged.
No	platform-specific slot data remapping is needed.
return	DefaultData;
Return	cached protocol if already located.
if	(gUbaProtocol != NULL) {
Check	current TPL level by raising to TPL_HIGH_LEVEL and restoring.
If	the old TPL was above TPL_NOTIFY (0x10), we cannot safely call
LocateProtocol	(which may block/allocate memory).
TPL	too high for LocateProtocol - skip and return NULL.
return	NULL;
Locate	the UBA protocol using its GUID.
No	registration key
Read	platform type from RTC CMOS register 0x4B.
PlatformType	= IoRead8 (RTC_CMOS_ADDRESS_PORT);
Determine	debug routing based on platform type.
if	(N3 > 3) {
N3	is in the valid platform type range (4-255), use as-is.
No	routing change needed.
Platform	type 0: read hardware strap from fixed memory address.
Bit	1 of the strap byte indicates debug capability.
N3	= ((volatile UINT8 )PLATFORM_STRAP_ADDRESS & 0x02)	0x01;**
N3	values 1, 2, 3: use directly (valid)
Map	the platform type to a debug route value.
N3	of 0 would have been remapped above, so 1+ is expected.
if	((N3 - 1) <= 0xFD) {
Valid	range: N3 is 1 to 255 (effectively all non-zero values).
if	(N3 == 1) {
0x80000004	} else {
0x80000006	}
If	the debug level matches the computed route mask, forward the message.
if	((DebugRoute & DebugLevel) != 0) {
UBA	protocol function index 1 (offset 0x08): DebugPrint
The	function is called with (Severity, FormatString, VaList).
UbaDebugFunc	*= (UINT64 ()(UINT64, CHAR8* , UINT64 ))*
Get	the UBA protocol and call its assert handler.
The	assert handler is at the same function index as DebugPrint
if	(UbaGetProtocolInterface () != NULL) {
Read	each GUID as two unaligned 64-bit values and compare.
Guid1Low	= ReadUnaligned64 (Guid1);
SystemTable	+ 0x68 (104) = NumberOfTableEntries
SystemTable	+ 0x70 (112) = ConfigurationTable pointer
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 sizeof(EFI_CONFIGURATION_TABLE) + sizeof(EFI_GUID));*
DXE	Services HOB not found - report error.
UbaDebugPrint	(0x80000000LL, "\nASSERT_EFI_ERROR (Status = %r)\n");
Print	debug banner identifying this module.
UbaDebugPrint	(0x80000000LL, "UBA:SlotDataUpdate-TypeLightningRidgeEXRP\n");
Locate	the UBA protocol interface.
Status	= gBootServices->LocateProtocol (
UBA	protocol GUID
Retrieve	the UBA SetData function at protocol index 2 (offset 0x10).
VOID	*Data, UINTN DataSize)
UbaSetData	*= (UINT64 ()(VOID* , EFI_GUID , VOID , UINT64))**
Register	PSLT Entry 1: Primary slot table with GetSlotCount + GetSlotData.
Status	*= UbaSetData (UbaProtocol, &gUbaSlotDataPsl1Guid, (VOID )mPslEntry1, 40);**
Register	PSLT Entry 2: Secondary slot table with GetSlotCount only.
Status	*= UbaSetData (UbaProtocol, &gUbaSlotDataPsl2Guid, (VOID )mPslEntry2, 32);**
Cache	UEFI global variables.
gImageHandle	= ImageHandle;
Retrieve	the HOB list (cached globally in gHobList).
GetHobList	();
Install	platform-specific slot data via UBA protocol.
Status	= InstallSlotData ();

Generated by HR650X BIOS Decompilation Project