UsbOcUpdateDxeNeonCityEPECB

Function Table

Address	Name	Description
	DebugPrintWorker
	AssertWorker
	EfiGetConfigTable
	ReadUnaligned64
	CompareGuid
	MmioRead16
	PchGetLpcDid
	PchGetStepping
	UsbOcGetSteppingMapping
	ProcessLibraryConstructor
	ProcessDxeServicesTableConstructor
	ProcessMmPciBaseConstructor
	ProcessHobLibConstructor
	ProcessPcdLibConstructor
	UsbOcUpdateInit
Global	variable declarations
MM	PCI Base Protocol interface (used for PCH register access)
typedef	struct {
Function	0: Called to perform MM PCI read/write operations.
Uses	an INPUT/OUTPUT parameter block with:
UINT64	*(MmPciBaseOp)(UINT32 Param[6]);**
UBA	Protocol Entry Point structure
Function	pointer table for platform-specific UBA operations.
Typically	indexed by offset to dispatch board-specific actions.
UINT64	*(Dispatch[4])(VOID);**
Global	data	mapped from .data segment
Driver	global binding handles
gImageHandle	- stored copy of the EFI image handle (at 0x14B8)
STATIC	EFI_HANDLE mImageHandle;
gST	- stored copy of the EFI System Table pointer (at 0x14A8)
STATIC	*EFI_SYSTEM_TABLE mSystemTable;**
gBS	- stored copy of the Boot Services table pointer (at 0x14B0)
STATIC	*EFI_BOOT_SERVICES mBootServices;**
gRT	- stored copy of the Runtime Services table pointer (at 0x14C0)
STATIC	*EFI_RUNTIME_SERVICES mRuntimeServices;**
gDS	- Dxe Services Table pointer (at 0x14D0)
STATIC	*VOID mDxeServicesTable;**
mPciUsra	- MM PCI Base Protocol pointer (at 0x14D8)
STATIC	*MM_PCI_BASE_PROTOCOL mMmPciBase;**
Protocol	cache: UEFI Debug Protocol (at 0x14C8)
STATIC	*VOID mDebugProtocol;**
mHobList	- HOB list pointer (at 0x14E0)
STATIC	*VOID mHobList;**
mPcd	- PCD Protocol pointer (at 0x14F0)
STATIC	*VOID mPcd;**
PCH	stepping cache (at 0x14A0)
STATIC	UINTN mPchStepping = PCH_STEP_UNSUPPORTED;
PCH	stepping override / board type (from CMOS or SMBIOS) (at 0x14F8)
STATIC	UINT8 mPchSteppingBoardType;
UBA	Protocol function table (queried during entry point)
Stored	at 0x14E8
STATIC	*UBA_PROTOCOL mUbaProtocol;**
Forward	declarations
Debug	Protocol GUID
EFI_GUID	gEfiDebugPortProtocolGuid = { 0xEBA4E8D2, 0x3858, 0x41EC, { 0xA2, 0x81, 0x26, 0x47, 0xBA, 0x96, 0x60, 0xD0 } };
USB	OC configuration data structures (referenced via UBA protocol)
USB	Overcurrent pin mapping table for NeonCity EPECB (A-step variant).
Maps	each USB port to its OC pin number. Index 0..47.
USB_OC_UPDATE_CONFIG	mUsbOcUpdateA = {
Port	0 -> OC Pin 0
Port	1 -> OC Pin 0
Port	2 -> OC Pin 1
Port	3 -> OC Pin 1
Port	4 -> OC Pin 2
Port	5 -> OC Pin 2
Port	6 -> OC Pin 3
Port	7 -> OC Pin 3
Port	8 -> OC Pin 4
Port	9 -> OC Pin 4
Port	10 -> OC Pin 5
Port	11 -> OC Pin 5
Port	12 -> OC Pin 6
Port	13 -> OC Pin 6
Port	14 -> OC Pin 7
Port	15 -> OC Pin 7
USB	Overcurrent pin mapping table for NeonCity EPECB (B-step variant).
USB_OC_UPDATE_CONFIG	mUsbOcUpdateB = {
USB	OC update protocol dispatch table.
UINT64	mUsbOcUpdateDispatch[] = {
Dispatch	function 0: UsbOcGetSteppingMapping
Returns	the appropriate USB OC config table for the detected PCH stepping.
Based	on sub_5C8's logic.
Dispatch	function 1: (reserved)
Dispatch	function 2: (reserved)
Dispatch	function 3: (reserved)
UBA	protocol instance for USB OC update.
UBA_PROTOCOL	mUbaUsbOcInstance = {
Helper	function implementations
Read	the GUID data in a single comparison-friendly way.
GUID	layout: Data1 (4 bytes) + Data2 (2 bytes) + Data3 (2 bytes) + Data4 (8 bytes)
We	compare the first 8 bytes and the remaining bytes.
Data1	= ReadUnaligned64 (Guid1);
Probe	the UEFI memory map size as a sanity check.
GetMemoryMap	will return the required buffer size.
MemoryMapSize	= 0;
Only	attempt to locate the protocol if the memory map is small
if	(MemoryMapSize / DescriptorSize <= 0x10) {
Locate	the DebugPort protocol
if	(EFI_ERROR (mBootServices->LocateProtocol (
Read	board type / debug level from CMOS RTC register 0x4B.
Bit	7 is the NMI disable bit, bits 6:0 indicate board type.
BoardType	= IoRead8 (0x70);
If	board type > 3, and it is zero, fall back to MMIO read.
if	(BoardType > 3) {
Map	BoardType to an EFI debug mask:
BoardType	1 -> EFI_DAGENT_ERROR (bit 30 = 0x40000004)
BoardType	2+ -> EFI_DAGENT_WARN (bit 31 = 0x80000006)
BoardType	0 -> reserved
if	(BoardType >= 1 && BoardType <= 0xFE) {
Determine	the log level mask for this board type
if	(mPchSteppingBoardType & 2) {
Use	a mask based on actual board type:
Type	1 boards: 0x40000004, others: 0x80000006
if	((mPchSteppingBoardType == 1) ? (ErrorLevel & 0x40000004) : (ErrorLevel & 0x80000006)) {
Debug	macro expansion wrappers
PCH	Stepping Detection
PCIEXBAR	base region
Config	space offset 0x00
Read	the PCH info from board-specific data
PchInfo	= PchGetLpcDid (); // Actually gets the PCH info struct
Stepping	byte from PCH info
Determine	stepping based on Device ID
LpcDid	*= ((UINT16* )PchInfo + 1); // Device ID from LPC DID register**
Lewisburg	PCH A0 stepping
switch	(PchRevision) {
0	break;
2	(default)
CDF	PCH family (DID <= 0xA13F)
Further	classified by PCH stepping revision:
rev	== 0 -> 48 (CDF A0)
rev	== 2 -> 49 (CDF A1)
rev	== 3 -> 50 (CDF B0)
rev	== 4 -> 51 (CDF B1)
rev	== 8 -> 52 (CDF B2)
rev	== 9 -> 53 (CDF B3)
if	(PchRevision <= 48 && (LpcDid + 24128) & 0xFF80) {
Check	board type and PCH rev to determine exact stepping
if	(PchRevision == 4) {
48	} else {
49	}
50	} else if (PchRevision == 9) {
51	} else if (PchRevision == 16) {
52	} else if (PchRevision == 17) {
DID	>= 0xA151 -> Unsupported
Stepping	= PCH_STEP_UNSUPPORTED;
Library	constructor-style initializers
Save	global image handle
mImageHandle	= ImageHandle;
Save	system table
mSystemTable	= SystemTable;
Save	boot services pointer
mBootServices	= SystemTable->BootServices;
Save	runtime services pointer
mRuntimeServices	= SystemTable->RuntimeServices;
Entry	Point
Initialize	library constructors (sets up global service pointers)
ProcessLibraryConstructor	(ImageHandle, SystemTable);
Log	the board type trace
DEBUG_PRINT	(DEBUG_INFO, "UBA:UsbOcUpdate-TypeNeonCityEPECB\n");
Locate	the UBA protocol
Status	= mBootServices->LocateProtocol (
Install	the USB OC configuration by calling the UBA protocol's
The	entry point receives the USB OC config data tables.
return	*((EFI_STATUS (EFIAPI )(VOID* , VOID , UINTN))(*

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