NvdimmSmbusCommon

Function Table

Address	Name	Description
	sub_167C
	sub_1584
	sub_1590
	sub_143C
	ModuleEntryPoint
Global	Data
EFI_HANDLE	ImageHandle; // 0x3058
0x3048	*EFI_BOOT_SERVICES BootServices; // 0x3050**
0x3060	UINT64 RuntimeServices_0; // 0x3068 - copy of RT
0x3080	- copy of BS
0x3070	UINT64 qword_3078; // 0x3078 - TPL notify event
0x3088	- debug port protocol ptr
0x3090	- HOB list ptr
0x3098	- gDS ptr
0x30A0	- debug level state
0x30B0	- SMM buffer struct
0x30B8	- SMM buffer address
GUID	definitions (in .rdata section)
EFI_GUID	gEfiDebugPortProtocolGuid = { 0xEBA4E8D2L, 0x3858, 0x41EC, { 0xA2, 0x81, 0x26, 0x47, 0xBA, 0x96, 0x60, 0xD0 } };
Validates	parameters and calls sub_1000 to zero memory.
Reads	a QWORD from an unaligned pointer with NULL validation.
Compares	two GUIDs by reading them as two 64-bit values.
Searches	SystemTable->ConfigurationTable for a matching GUID.
Check	NumberOfTableEntries (SystemTable + 104 = 0x68, offset of
NumberOfTableEntries	in EFI_SYSTEM_TABLE)
if	*((UINT64* )(SystemTablePtr + 104) == 0) {**
Walk	ConfigurationTable array at SystemTable + 112 (= 0x70)
entries	are 24 bytes each (GUID + pointer)
for	(i = 0;
Table	pointer is at offset 16 within each 24-byte entry
Locates	and caches the HOB list pointer via the UEFI configuration table.
Sets	BootServices_0 to 0. Registered via CreateEvent to track
boot	services availability.
Runtime	services cleanup for debug port protocol pointer.
Registered	via CreateEventEx with EVT_NOTIFY_SIGNAL.
Locates	and caches the EFI_DEBUGPORT_PROTOCOL for debug print output.
Uses	BootServices->LocateProtocol if available; checks TPL first.
RaiseTPL	to TPL_HIGH_LEVEL (31) via BootServices_0 + 24
Tpl	*= ((UINT64 (__fastcall )(UINT64))(BootServices_0 + 24))(31);
BootServices_0	+ 320 = LocateProtocol
Status	*= ((INT64 (__fastcall** )(void , UINT64, UINT64 ))(**
Conditionally	outputs debug messages based on the current debug level
stored	in CMOS ports 0x70/0x71 (index 0x4B). If a debug port protocol
is	available and the message's error level passes the platform filter
the	message is forwarded to the protocol's output function.
Read	current debug level from CMOS index 0x4B
__outbyte	**(0x70, (__inbyte (0x70) & 0x80)	0x4B);**
Clamp	to max level 3
N113	= CmosDebugLevel;
Convert	to filter mask (level 1 = EFI_D_ERROR, level 2+ = EFI_D_WARN)
DebugLevel	= (UINT8)(N113 - 1);
EFI_D_WARN	equivalent
EFI_D_WARN	**	EFI_D_ERROR**
EFI_D_WARN	only
If	the message level passes the filter, call debug output
if	((FilterLevel & ErrorLevel) != 0) {
Calls	debug output with file, line, and assertion condition.
Primary	driver initialization that:
Source	references:
NotifyFunction	= sub_1584
EVT_NOTIFY_SIGNAL	**	EVT_TIMER**
Cache	HOB list
sub_167C	();
Locate	DXE Services Table by GUID
Result	= sub_15B8 ((UINT64)&gEfiDxeServicesTableGuid, &qword_3098);
Allocates	SMM communication buffer, zeros it, and installs the
gEfiSmbusHcProtocolGuid	protocol for NONSMM<->SMM interface.
AllocateRuntimePages	(type 1 = EfiRuntimeServicesData, 10 pages)
Status	*= ((INT64 (__fastcall** )(UINT64, UINT64, UINT64, UINT64 ))(*
AllocateAnyPages	10, // Pages
EfiRuntimeServicesData	&Buffer
Log	the SMM communication buffer address
sub_14C4	(
Zero	the communication buffer (15 bytes for the SMBUS interface)
sub_13D8	*((char )Buffer, 0x0F);**
Zero	the local buffer structure
sub_13D8	*((char )&buf_, 0x10);**
Initialize	the SMM communication structure
buf_0	= Buffer; // SMM buffer pointer
Protocol	revision or initialized flag
Status	*= ((INT64 (__fastcall** )(EFI_HANDLE , void , UINT64, char ))(*
DXE	driver entry point.
Initializes	services, allocates SMM communication buffer, installs
the	SMBUS NONSMM<->SMM interface protocol.
Clean	up: close protocol notify events

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