IioCfgUpdateDxeNeonCityEPECB

Function Table

Address	Name	Description
	ReadUnaligned64
	IsMatchingHobGuidPair
	DebugAssert
	DebugPrint
	SetIioConfiguration
	NoOpStub
	ModuleEntryPoint
UEFI	Protocol GUID definitions
These	GUIDs identify the IIO configuration tables and protocols
used	by this driver for the NeonCity EP EC B platform.
EFI_GUID	gIioConfigTable0Guid = IIO_CONFIG_TABLE_0_GUID;
HOB	discovery GUID pair.
The	system table contains a firmware resource array. Each entry is a 24-byte
for	a pair where the first QWORD of descriptor[N] matches gHobListGuid1 and
the	first QWORD of descriptor[N] matches gHobListGuid2. The third QWORD of
the	matching descriptor contains the HOB list pointer.
gHobListGuid1	= gEfiDxeServicesTableGuid
EFI_GUID	gHobListGuid1 = { 0x7739F24C, 0x93D7, 0x11D4, { 0x9A, 0x3A, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D } };
Module	globals
VOID	*mHobList = NULL; ///< Cached HOB list pointer
IIO	Configuration Table (platform data for NeonCity EP EC B)
The	configuration data is stored in PIIO format (signature "PIIO", version 1
length	0xD48). It contains IIO port configuration entries including PCIe port
IIO	stack on the NeonCity EP EC B platform.
IIO	port configuration entries follow
Internal	function prototypes
UINT64	ReadUnaligned64 (
The	system table at offset 0x68 (104) contains the number of firmware
resource	descriptors, and at offset 0x70 (112) contains the array pointer.
FwResourceCount	*= (UINTN* )((UINTN)gST + 104);**
The	third QWORD of the matching descriptor is the HOB list pointer.
mHobList	*= (VOID** )((UINTN)FwResourceArray + (Index 24) + 16);*
HOB	list not found: report error via debug and assert.
DEBUG	((EFI_D_ERROR, "\nASSERT_EFI_ERROR (Status = %r)\n", EFI_NOT_FOUND));
Probe	page allocator: try to allocate 0x10 pages (64 KB).
The	pointer value is checked against 0x10 to determine if the
allocator	function is available (low addresses are typical for
early	DXE phase allocations, and a return value <= 0x10 suggests
the	allocation backend is functional).
Pages	= (UINT64)(UINTN)gBS->AllocatePages (AllocateAnyPages, EfiBootServicesData, 0x10);
The	assertion handler is at offset 8 in the protocol vtable.
AssertFunc	*= (UINT64 ()(CONST CHAR8 , UINTN, CONST CHAR8* ))((UINTN)DebugProtocol + 8);**
Read	the current CMOS index register (I/O port 0x70)
then	select CMOS offset 0x4B (BIOS debug level).
CmosIndex	= __inbyte (0x70);
Determine	effective debug level.
If	DebugLevel > 3 (e.g., uninitialized CMOS), fall back to
hardware	strap: read from I/O port 0xFDAF0490 bit 1, then OR with 1.
if	(DebugLevel > 3) {
Compute	the filter mask based on debug level.
Level	1 (errors only): 0x80000004
Level	2+ (errors+warn): 0x80000006
ShouldPrint	= FALSE;
The	print function is at offset 0 in the protocol vtable.
PrintFunc	*= (UINT64 ()(UINTN, CONST CHAR8 , ...))((UINTN)DebugProtocol);**
Report	the platform type for debug purposes.
DEBUG	((EFI_D_INFO, "UBA:IioCfgUpdate-TypeNeonCityEPECB\n"));
Locate	the UBA IIO configuration protocol.
The	protocol GUID is IIO_CONFIG_PROTOCOL_GUID.
Status	= gBS->LocateProtocol (&gIioConfigProtocolGuid, NULL, &UbaProtocol);
Call	the protocol's SetIioConfig function at offset 16 in the vtable
Register	configuration table 0.
Status	*= ((EFI_STATUS ()(VOID* , EFI_GUID , VOID , UINTN))((UINTN)UbaProtocol + 16))(**
Register	configuration table 1.
Register	configuration table 2.
Register	configuration table 3.
Save	the global image handle.
ASSERT	(ImageHandle != NULL);
Save	the UEFI system table pointer.
ASSERT	(SystemTable != NULL);
Save	the boot services table pointer.
ASSERT	(SystemTable->BootServices != NULL);
Save	the runtime services table pointer.
ASSERT	(SystemTable->RuntimeServices != NULL);
Retrieve	the HOB list (needed by platform configuration code).
GetHobList	();
Register	the IIO configuration data via the UBA protocol.
Status	= SetIioConfiguration ();

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