NetworkStackSetupScreen

Function Table

Address	Name	Description
	ReadUnalignedQword
	CompareGuidQword
	CmosReadNvStorage
	AmiBoardInfoAssert
	AmiBoardInfoConditionalSend
	AmiBoardInfoInit
	AmiBoardInfoEntryPoint
Global	variable storage (mapped from .data section)
EFI_HANDLE	gImageHandle_ = NULL; // 0xD00 (.data)
0xCF0	(.data)
Cached	protocol pointer (located by sub_4F8)
EFI_AMI_BOARD_INFO_PROTOCOL	*gAmiBoardInfoProtocol = NULL; // 0xD10 (.data)
Cached	HOB list pointer (located by sub_600 -> GetHobList)
EFI_PHYSICAL_ADDRESS	gHobListRva = 0; // 0xD18 (.data)
Second	copies of service pointers (aliased .data at 0xD20/0xD28/0xD30)
UINT64	gBS_1 = 0; // 0xD20
0xD28	UINT64 gST_1 = 0; // 0xD30
NetworkStackVar	data buffer (10 bytes at 0xD40)
NETWORK_STACK_VAR	gNvData; // 0xD40..0xD49
UINT8	gNvBootFlag = 0; // byte_D45 (offset 5)
word_D46	(offset 6)
GUID	definitions
GUID	for the AMI Board Info Protocol.
The	protocol interface is located via gBS->LocateProtocol.
Stored	at .data 0xCC0.
EFI_GUID	gAmiBoardInfoProtocolGuid = {
PiHobList	GUID (standard UEFI PiHobList GUID).
Used	to locate the HOB list from the system table configuration table.
Stored	as two halves at .data 0xCD0 (first 8 bytes) and 0xCD8 (second 8).
EFI_GUID	gPiHobListGuid = {
Vendor	GUID for the NetworkStackVar variable.
Stored	at .data 0xCE0.
EFI_GUID	gAmiBoardInfoVarGuid = {
Forward	declarations
UINT64	EFIAPI
Save	current index, select CMOS diagnostic register (0x4B).
Mask	bit 7 (power good flag) to access the register number.
IoWrite8	(
Read	the diagnostic status value.
DiagnosticValue	= IoRead8 (CMOS_REG_DATA_PORT);
Value	appears accessible.
if	(NvStorage == 0) {
and	use bit 1 combined with bit 0 as override indicator.
NvStorage	= ((volatile UINT8 )0xFDAF0490 & 2)	1;**
if	((UINT8)(NvStorage - 1) > 0xFD) {
NvStorage	is not 1 or 2 (or is 0xFF) -> undetermined.
return	0;
0x80000004	}
Allocate	a small pool (EfiBootServicesData) as scratch.
Pool	= AllocatePool (31); // 31 = EfiBootServicesData
FreePool	(Pool);
Locate	the protocol.
Status	= gBS_->LocateProtocol (
Registration	(VOID )&gAmiBoardInfoProtocol**
Offset	0x00: AssertCallback.
CMOS	NV storage status does not match Mask.
return	EFI_UNSUPPORTED;
Status	matches; invoke StatusSend callback at offset 0x08.
VA_START	(Args, Arg2);
Initialize	to NULL.
gHobListRva	= 0;
Walk	the configuration table array.
Each	entry is sizeof(EFI_CONFIGURATION_TABLE) bytes = 24 bytes:
16	bytes VendorGuid + 8 bytes VendorTable pointer.
for	(Index = 0; Index < TableCount; Index++) {
Found	the HOB list entry.
gHobListRva	= (EFI_PHYSICAL_ADDRESS)ConfigEntry->VendorTable;
ASSERT	failure on debug builds. The original binary called
sub_578	(conditional send) with:
mask	= 0x80000000LL
arg2	= "\nASSERT_EFI_ERROR (Status = %r)\n" string ref
arg3	= 0x800000000000000EuLL (EFI_NOT_FOUND)
Cache	services if not already set (by entry point).
if	(gST_ == NULL) {
Try	to read the existing variable.
VarSize	= sizeof (gNvData); // = NETWORK_STACK_VAR_DATA_SIZE = 10
Attributes	(returned)
Variable	does not exist: zero the buffer and set defaults.
word_D46	gNvBootFlag = 1; // byte_D45
default	flag value
Write	the variable as non-volatile + boot + runtime.
Status	= gRT_->SetVariable (
Original	driver does not check SetVariable status.
_ModuleEntryPoint	(0x370) -> AmiBoardInfoEntryPoint
Save	global handles (standard UEFI boot services library pattern).
gImageHandle_	= ImageHandle;
Locate	and cache the HOB list pointer.
GetHobList	(SystemTable);
Initialize	the board info variable ("NetworkStackVar").
return	AmiBoardInfoInit (10, SystemTable);

Generated by HR650X BIOS Decompilation Project