SmbiosType39

Function Table

Address	Name	Description
	InternalReadUnaligned64
	AsciiStrLen
	StrLen
	EfiGetSystemConfigurationTable
	SendHeciPowerSupplyCommand
	GetHobList
	FreePoolOrBuffer
	DebugPrint
	InstallSmbiosType39Structure
	SmbiosType39EntryPoint
Global	data
EFI_HANDLE	gImageHandle = NULL;
GUID	definitions (referenced from global data section)
extern	EFI_GUID gEfiSmbiosProtocolGuid;
HECI	command message for power supply queries
0x8A0A	**= HECI_GROUP_ID << 8	0x0A**
HECI	command byte
Parameter	data (varies per command)
HECI	command template: GroupId = 0x8A0A
ME	FWS (Firmware Status) register bits
Zero	out 8 bytes at a time, then remaining bytes
ZeroMem	(Buffer, Length);
PcdMaximumAsciiStringLength	exceeded
Ensure	buffers do not overlap in a way that would cause corruption
ASSERT	*((UINTN)((CHAR8 )Destination - Source) > AsciiStrLen (Source));**
Build	the HECI request header
0x8A0A	Request.Command = Command;
supply	bay index in low byte
Send	the command via HECI with the default buffer size
ResponseLength	= sizeof (Response);
Check	response: if HeciMsg[1] is non-zero but not 0xA3, no data available
if	(Response[1] != 0) {
Copy	the returned data to the caller's buffer
DataPtr	= &Response[3];
Allocate	31 pages for PCD protocol usage
Pages	= EFI_SIZE_TO_PAGES (31);
Not	enough pages - return NULL
return	NULL;
Locate	the PCD protocol
Status	= gBS->LocateProtocol (
Read	CMOS to determine current debug level
CmosByte	= IoRead8 (0x70);
Determine	the error mask based on the debug level
if	(DebugLevel > 3) {
Initialize	the INVALID string length for fallback
V2	= AsciiStrLen ("INVALID");
Locate	the SMBIOS protocol
SmbiosRecord	*= (SMBIOS_TABLE_TYPE39 )(UINTN)GetSmbiosProtocol ();**
Close	the notification event
Status	= gBS->CloseEvent (Event);
Locate	the HECI protocol
HeciProtocol	= GetHeciProtocol ();
Check	ME firmware status to determine if ME is in normal mode
NvRamVariable	= 512;
ME	is not in S0/M0 normal operation state
DEBUG	((DEBUG_INFO, "MeFs1.Bits.CurrentState == %d\n", CurrentMeState));
Enumerate	power supply bays (0 and 1)
SupplyBay	= 0;
Step	1: Get Device Name (command = 0x9A, -102 signed)
AsciiStrCpyS	(DeviceName, "INVALID");
Step	2: Get Manufacturer (command = 0x99, -103 signed)
Step	3: Get Serial Number (command = 0x62, -98 signed as 0x9E)
Step	4: Get Asset Tag (command = 0xF1, -15 signed)
Asset	tag command
Step	5: Get Model Part Number (command = 0x9B, -101 signed)
Step	6: Get Revision Level (command = 0xA7, -89 signed)
Step	7: Get Max Power Capacity
Capacity	request parameter
Step	8: Get Power Supply Present / Status
Same	as capacity command
Status	= Unknown
Determine	power supply status based on response byte
If	bit 1 of response[2] is clear -> status = 1 (Present, Unknown)
If	bit 1 of response[2] is set -> status = 3 (Present, Good)
PowerSupplyStatus	= ((PsuResponse[2] & 0x02) != 0) ? 1 : 3;
Step	9: Allocate and build SMBIOS Type 39 record
TotalStringLength	= AsciiStrLen (DeviceName)
Fill	in the SMBIOS Type 39 record fields
Set	power unit group (2 = "From the Mapping to the Power Unit Group")
Build	the power supply status flags
Bit	0 = Power Supply Present
Bits	6-7 = Power Supply Status (00=Unknown, 01=OK, 10=Non-critical, 11=Critical)
PowerSupplyFlags	**= (PowerSupplyPresent & 1)	((PowerSupplyStatus & 7) << 6);**
Now	fill the string area.
Strings	are packed as null-terminated ASCII after the fixed structure.
CurrentStringPtr	*= (CHAR8 )(SmbiosRecord + 1);**
Step	10: Add the Type 39 record via SMBIOS protocol
Cleanup	allocated buffers
FreePool	(StringBuffer);
Move	to the next supply bay
SupplyBayIncrement	+= 2;
Initialize	global variables
gImageHandle	= ImageHandle;
Initialize	HOB list and PCD protocol
GetHobList	();
Look	up the DXE Services Table via system configuration
Status	= EfiGetSystemConfigurationTable (
Look	up the MM PCI base protocol (for MMIO PCI config access)
Register	a callback on the SMBIOS protocol installation
When	SMBIOS protocol becomes available, InstallSmbiosType39Structure
will	be called.
Status	= gBS->CreateEvent (

Generated by HR650X BIOS Decompilation Project