SlotDataUpdateDxeNeonCityFPGA

Function Table

Address	Name
	GetSlotCount
	GetSlotData
	UbaDebugPrint
	UbaDebugAssert
	ReadUnaligned64
	IsHobGuidMatch
	InstallSlotData
	SlotDataUpdateDxeEntryPoint
GUID	Definitions
EFI_GUID	gUbaProtocolGuid = UBA_PROTOCOL_GUID;
Global	Variables
EFI_HANDLE	gImageHandle = NULL; ///< 0xC80: Image handle from entry point
Platform	Slot Data (embedded in .data section)
Three	PSLT entries are defined statically and registered with the UBA
protocol	during initialization. The PSLT format:
Offset	Size Field
0	4 Signature ("PSLT")
4	4 Version (1)
8	4 Length (total size of this entry)
12	4 SlotCount (function pointer offset to GetSlotCount)
16	4 Reserved1
20	4 SlotDataOffset (function pointer offset to GetSlotData)
24	16 ConfigData (OEM-specific bitfield configuration)
PSLT	Entry 1 (at 0xC50, size 32): Primary PSLT with full length 0xC40
Signature	0x01, 0x00, 0x00, 0x00, // Version = 1
Length	= 0xC40 (3136 bytes)
SlotCount	= 0x4E8 (GetSlotCount function)
Reserved1	= 0
SlotDataOffset	= 0x4EC (GetSlotData function)
PSLT	Entry 2 (at 0xBE0, size 40): Secondary PSLT with length 0xC40
Length	= 0xC40
SlotCount	= 0x4E8
SlotDataOffset	= 0x4EC
PSLT	Entry 3 (at 0xC18, size 40): Tertiary PSLT with alternate length 0xC08
Length	= 0xC08 (3080 bytes)
Function	Implementations
Check	if the platform type (N3) is 0 or 3, which maps to
a	"standard/other" slot classification (value 15 = 0x0F).
if	**((SlotNumber == 0)	(SlotNumber == 3)) {**
Return	cached protocol if already located.
if	(gUbaProtocol != NULL) {
Allocate	a small test buffer to verify pool availability.
Size	31 with EfiBootServicesData type via gBS->AllocatePool.
The	allocation of 31 bytes is a probe to verify the UEFI memory
system	is operational. If the allocation returns > 0x10 bytes
we	proceed. If the allocation fails or returns <= 0x10 bytes
we	bail out (return NULL).
Locate	the UBA protocol using its GUID.
No	registration key
Get	the UBA protocol interface (lazy init through cached result).
Uba	*= (UBA_PROTOCOL )UbaGetProtocolInterface ();**
Read	platform type from RTC CMOS register 0x4B.
We	preserve bit 7 (NMI mask) of the address register.
PlatformType	= IoRead8 (0x70);
Select	CMOS reg 0x4B
Read	platform type byte
Determine	debug routing based on platform type.
if	(N3 > 3) {
N3	is in valid range > 3, use as-is
Platform	type 0: read hardware strap from F000:0490 bit 1, OR with 1
else	N3 is 1, 2, or 3: use directly
Map	platform type to debug route value.
if	((N3 - 1) <= 0xFD) {
N3	is 1..3 (valid range check passed)
UBA_DEBUG_ROUTE_A	} else {
UBA_DEBUG_ROUTE_B	}
If	the debug level matches the routing mask, call UBA debug output.
if	((DebugRoute & DebugLevel) != 0) {
UBA	protocol function index 1 (offset 0x08): DebugPrint
UbaDebugFunc	*= (UBA_DEBUG_PRINT)((UINT64* )((UINT8 )Uba + 8));*
Get	the UBA protocol and call its assertion handler.
UBA	protocol function index 1 (offset 0x08) is the assert handler
which	takes (FileName, LineNumber, AssertString).
Read	each GUID as two unaligned 64-bit values and compare.
Guid1Low	= ReadUnaligned64 (Guid1);
SystemTable	+ 104 (0x68) = NumberOfTableEntries (UINTN)
SystemTable	*+ 112 (0x70) = ConfigurationTable (EFI_CONFIGURATION_TABLE )**
HobCount	*= (UINTN* )((UINT8 )gSystemTable + 104);*
Walk	the configuration table to find the DXE Services HOB entry.
Each	entry is sizeof(EFI_CONFIGURATION_TABLE) = 24 bytes:
for	(Index = 0; Index < HobCount; Index++) {
Found	the DXE Services HOB - cache its data pointer.
gHobList	*= (VOID** )(HobEntries + Index 24 + 16);*
DXE	Services HOB not found - report error.
UbaDebugPrint	(0x80000000LL, "\nASSERT_EFI_ERROR (Status = %r)\n", 0x800000000000000EULL);
Print	debug banner identifying this module.
UbaDebugPrint	(0x80000000, "UBA:SlotDataUpdate-TypeNeonCityFPGA\n");
Locate	the UBA protocol interface.
Status	= gBootServices->LocateProtocol (
UBA	protocol GUID
UBA	protocol function index 2 (offset 0x10): SetData
VOID	*Data, UINTN DataSize)
UbaSetData	*= (UBA_SET_DATA)((UINT64* )((UINT8 )Uba + 16));*
Register	PSLT Entry 1: Primary slot table with length 0xC40
Status	*= UbaSetData (Uba, &gUbaSlotDataPsl1Guid, (VOID )mPslEntry1, 32);**
Register	PSLT Entry 2: Secondary slot table with length 0xC40
Status	*= UbaSetData (Uba, &gUbaSlotDataPsl2Guid, (VOID )mPslEntry2, 40);**
Register	PSLT Entry 3: Tertiary slot table with alternate length 0xC08
Status	*= UbaSetData (Uba, &gUbaSlotDataPsl3Guid, (VOID )mPslEntry3, 40);**
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