EFI_STATUS
EFIAPI
_ModuleEntryPoint (
UINT32 BiosMemoryMapBaseAddress
)
{
SerialPortInitialize ();
EfiLoader(BiosMemoryMapBaseAddress);
return EFI_SUCCESS;
}
/**
Platform initialization.
@param[in] FspHobList HobList produced by FSP.
@param[in] StartOfRange Start of temporary RAM.
@param[in] EndOfRange End of temporary RAM.
**/
VOID
EFIAPI
PlatformInit (
IN VOID *FspHobList,
IN VOID *StartOfRange,
IN VOID *EndOfRange
)
{
//
// Platform initialization
// Enable Serial port here
//
SerialPortInitialize ();
DEBUG ((DEBUG_INFO, "PrintPeiCoreEntryPointParam in PlatformInit\n"));
DEBUG ((DEBUG_INFO, "FspHobList - 0x%x\n", FspHobList));
DEBUG ((DEBUG_INFO, "StartOfRange - 0x%x\n", StartOfRange));
DEBUG ((DEBUG_INFO, "EndOfRange - 0x%x\n", EndOfRange));
}
/**
Initialize the debug port.
This function will initialize debug port to get it ready for data transmition. If
certain Debug Communication Library instance has to save some private data in the
stack, this function must work on the mode that doesn't return to the caller, then
the caller needs to wrap up all rest of logic after DebugPortInitialize() into one
function and pass it into DebugPortInitialize(). DebugPortInitialize() is
responsible to invoke the passing-in function at the end of DebugPortInitialize().
If the parameter Function is not NULL, Debug Communication Library instance will
invoke it by passing in the Context to be the first parameter. Debug Communication
Library instance could create one debug port handle to be the second parameter
passing into the Function. Debug Communication Library instance also could pass
NULL to be the second parameter if it doesn't create the debug port handle.
If the parameter Function is NULL, and Context is not NULL. At this time, Context
is the debug port handle created by the previous Debug Communication Library
instance.
a) If the instance can understand and continue use the private data of the previous
instance, it could return the same handle as passed in (as Context parameter).
b) If the instance does not understand, or does not want to continue use the
private data of the previous instance, it could ignore the input Context parameter
and create the new handle to be returned.
If Function() is NULL and Context is NULL, Debug Communication Library could create a
new handle and return it. NULL is also a valid handle to be returned.
@param[in] Context Context needed by callback function; it was optional.
@param[in] Function Continue function called by Debug Communication library;
it was optional.
@return The debug port handle created by Debug Communication Library if Function
is not NULL.
**/
DEBUG_PORT_HANDLE
EFIAPI
DebugPortInitialize (
IN VOID *Context,
IN DEBUG_PORT_CONTINUE Function
)
{
RETURN_STATUS Status;
Status = SerialPortInitialize ();
if (RETURN_ERROR(Status)) {
DEBUG ((EFI_D_ERROR, "Debug Serial Port: Initialization failed!\n"));
}
if (Function != NULL) {
Function (Context, NULL);
}
return NULL;
}
VOID
EFIAPI
PlatformInit (
IN VOID *FspHobList,
IN VOID *StartOfRange,
IN VOID *EndOfRange
)
{
//
// Platform initialization
// Enable Serial port here
//
EnableInternalUart ();
SerialPortInitialize ();
DEBUG ((DEBUG_INFO, "PlatformInit\n"));
DEBUG ((DEBUG_INFO, "FspHobList - 0x%x\n", FspHobList));
DEBUG ((DEBUG_INFO, "StartOfRange - 0x%x\n", StartOfRange));
DEBUG ((DEBUG_INFO, "EndOfRange - 0x%x\n", EndOfRange));
}
/**
Dispatch initialization request to sub status code devices based on
customized feature flags.
**/
VOID
InitializationDispatcherWorker (
VOID
)
{
EFI_STATUS Status;
//
// If enable UseSerial, then initialize serial port.
// if enable UseRuntimeMemory, then initialize runtime memory status code worker.
//
if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
//
// Call Serial Port Lib API to initialize serial port.
//
Status = SerialPortInitialize ();
ASSERT_EFI_ERROR (Status);
}
if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
Status = MemoryStatusCodeInitializeWorker ();
ASSERT_EFI_ERROR (Status);
}
}
/**
Reset the serial device.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The serial device could not be reset.
**/
EFI_STATUS
EFIAPI
SerialReset (
IN EFI_SERIAL_IO_PROTOCOL *This
)
{
EFI_STATUS Status;
Status = SerialPortInitialize ();
if (EFI_ERROR (Status)) {
return Status;
}
//
// Go set the current attributes
//
Status = This->SetAttributes (
This,
This->Mode->BaudRate,
This->Mode->ReceiveFifoDepth,
This->Mode->Timeout,
(EFI_PARITY_TYPE) This->Mode->Parity,
(UINT8) This->Mode->DataBits,
(EFI_STOP_BITS_TYPE) This->Mode->StopBits
);
//
// The serial device may not support some of the attributes. To prevent
// later failure, always return EFI_SUCCESS when SetAttributes is returning
// EFI_INVALID_PARAMETER.
//
if (Status == EFI_INVALID_PARAMETER) {
return EFI_SUCCESS;
}
return Status;
}
/**
Dispatch initialization request to sub status code devices based on
customized feature flags.
**/
VOID
InitializationDispatcherWorker (
VOID
)
{
EFI_PEI_HOB_POINTERS Hob;
EFI_STATUS Status;
MEMORY_STATUSCODE_PACKET_HEADER *PacketHeader;
MEMORY_STATUSCODE_RECORD *Record;
UINTN Index;
UINTN MaxRecordNumber;
//
// If enable UseSerial, then initialize serial port.
// if enable UseRuntimeMemory, then initialize runtime memory status code worker.
//
if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
//
// Call Serial Port Lib API to initialize serial port.
//
Status = SerialPortInitialize ();
ASSERT_EFI_ERROR (Status);
}
if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
Status = RtMemoryStatusCodeInitializeWorker ();
ASSERT_EFI_ERROR (Status);
}
//
// Replay Status code which saved in GUID'ed HOB to all supported devices.
//
if (FeaturePcdGet (PcdStatusCodeReplayIn)) {
//
// Journal GUID'ed HOBs to find all record entry, if found,
// then output record to support replay device.
//
Hob.Raw = GetFirstGuidHob (&gMemoryStatusCodeRecordGuid);
if (Hob.Raw != NULL) {
PacketHeader = (MEMORY_STATUSCODE_PACKET_HEADER *) GET_GUID_HOB_DATA (Hob.Guid);
Record = (MEMORY_STATUSCODE_RECORD *) (PacketHeader + 1);
MaxRecordNumber = (UINTN) PacketHeader->RecordIndex;
if (PacketHeader->PacketIndex > 0) {
//
// Record has been wrapped around. So, record number has arrived at max number.
//
MaxRecordNumber = (UINTN) PacketHeader->MaxRecordsNumber;
}
for (Index = 0; Index < MaxRecordNumber; Index++) {
//
// Dispatch records to devices based on feature flag.
//
if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
SerialStatusCodeReportWorker (
Record[Index].CodeType,
Record[Index].Value,
Record[Index].Instance,
NULL,
NULL
);
}
if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
RtMemoryStatusCodeReportWorker (
Record[Index].CodeType,
Record[Index].Value,
Record[Index].Instance,
NULL,
NULL
);
}
}
}
}
}
VOID
CEntryPoint (
IN UINTN MpId,
IN UINTN SecBootMode
)
{
CHAR8 Buffer[100];
UINTN CharCount;
UINTN JumpAddress;
// Invalidate the data cache. Doesn't have to do the Data cache clean.
ArmInvalidateDataCache ();
// Invalidate Instruction Cache
ArmInvalidateInstructionCache ();
// Invalidate I & D TLBs
ArmInvalidateInstructionAndDataTlb ();
// CPU specific settings
ArmCpuSetup (MpId);
// Enable Floating Point Coprocessor if supported by the platform
if (FixedPcdGet32 (PcdVFPEnabled)) {
ArmEnableVFP ();
}
// Initialize peripherals that must be done at the early stage
// Example: Some L2 controller, interconnect, clock, DMC, etc
ArmPlatformSecInitialize (MpId);
// Primary CPU clears out the SCU tag RAMs, secondaries wait
if (ArmPlatformIsPrimaryCore (MpId) && (SecBootMode == ARM_SEC_COLD_BOOT)) {
if (ArmIsMpCore()) {
// Signal for the initial memory is configured (event: BOOT_MEM_INIT)
ArmCallSEV ();
}
// SEC phase needs to run library constructors by hand. This assumes we are linked against the SerialLib
// In non SEC modules the init call is in autogenerated code.
SerialPortInitialize ();
// Start talking
if (FixedPcdGetBool (PcdTrustzoneSupport)) {
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Secure firmware (version %s built at %a on %a)\n\r",
(CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__);
} else {
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Boot firmware (version %s built at %a on %a)\n\r",
(CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__);
}
SerialPortWrite ((UINT8 *) Buffer, CharCount);
// Initialize the Debug Agent for Source Level Debugging
InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, NULL, NULL);
SaveAndSetDebugTimerInterrupt (TRUE);
// Enable the GIC distributor and CPU Interface
// - no other Interrupts are enabled, doesn't have to worry about the priority.
// - all the cores are in secure state, use secure SGI's
ArmGicEnableDistributor (PcdGet32(PcdGicDistributorBase));
ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
} else {
// Enable the GIC CPU Interface
ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
}
// Enable Full Access to CoProcessors
ArmWriteCpacr (CPACR_CP_FULL_ACCESS);
// Test if Trustzone is supported on this platform
if (FixedPcdGetBool (PcdTrustzoneSupport)) {
if (ArmIsMpCore ()) {
// Setup SMP in Non Secure world
ArmCpuSetupSmpNonSecure (GET_CORE_ID(MpId));
}
// Either we use the Secure Stacks for Secure Monitor (in this case (Base == 0) && (Size == 0))
// Or we use separate Secure Monitor stacks (but (Base != 0) && (Size != 0))
ASSERT (((PcdGet32(PcdCPUCoresSecMonStackBase) == 0) && (PcdGet32(PcdCPUCoreSecMonStackSize) == 0)) ||
((PcdGet32(PcdCPUCoresSecMonStackBase) != 0) && (PcdGet32(PcdCPUCoreSecMonStackSize) != 0)));
// Enter Monitor Mode
enter_monitor_mode (
(UINTN)TrustedWorldInitialization, MpId, SecBootMode,
(VOID*) (PcdGet32 (PcdCPUCoresSecMonStackBase) +
(PcdGet32 (PcdCPUCoreSecMonStackSize) * (ArmPlatformGetCorePosition (MpId) + 1)))
);
} else {
if (ArmPlatformIsPrimaryCore (MpId)) {
SerialPrint ("Trust Zone Configuration is disabled\n\r");
}
// With Trustzone support the transition from Sec to Normal world is done by return_from_exception().
// If we want to keep this function call we need to ensure the SVC's SPSR point to the same Program
// Status Register as the the current one (CPSR).
copy_cpsr_into_spsr ();
// Call the Platform specific function to execute additional actions if required
JumpAddress = PcdGet32 (PcdFvBaseAddress);
ArmPlatformSecExtraAction (MpId, &JumpAddress);
NonTrustedWorldTransition (MpId, JumpAddress);
}
ASSERT (0); // We must never return from the above function
}
VOID
PrePiMain (
IN UINTN UefiMemoryBase,
IN UINTN StacksBase,
IN UINT64 StartTimeStamp
)
{
EFI_HOB_HANDOFF_INFO_TABLE* HobList;
EFI_STATUS Status;
CHAR8 Buffer[100];
UINTN CharCount;
UINTN StacksSize;
// Initialize the architecture specific bits
ArchInitialize ();
// Declare the PI/UEFI memory region
HobList = HobConstructor (
(VOID*)UefiMemoryBase,
FixedPcdGet32 (PcdSystemMemoryUefiRegionSize),
(VOID*)UefiMemoryBase,
(VOID*)StacksBase // The top of the UEFI Memory is reserved for the stacks
);
PrePeiSetHobList (HobList);
//
// Ensure that the loaded image is invalidated in the caches, so that any
// modifications we made with the caches and MMU off (such as the applied
// relocations) don't become invisible once we turn them on.
//
InvalidateDataCacheRange((VOID *)(UINTN)PcdGet64 (PcdFdBaseAddress), PcdGet32 (PcdFdSize));
// Initialize MMU and Memory HOBs (Resource Descriptor HOBs)
Status = MemoryPeim (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
ASSERT_EFI_ERROR (Status);
// Initialize the Serial Port
SerialPortInitialize ();
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"UEFI firmware (version %s built at %a on %a)\n\r",
(CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__);
SerialPortWrite ((UINT8 *) Buffer, CharCount);
// Create the Stacks HOB (reserve the memory for all stacks)
StacksSize = PcdGet32 (PcdCPUCorePrimaryStackSize);
BuildStackHob (StacksBase, StacksSize);
//TODO: Call CpuPei as a library
BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
// Set the Boot Mode
SetBootMode (ArmPlatformGetBootMode ());
// Initialize Platform HOBs (CpuHob and FvHob)
Status = PlatformPeim ();
ASSERT_EFI_ERROR (Status);
// Now, the HOB List has been initialized, we can register performance information
PERF_START (NULL, "PEI", NULL, StartTimeStamp);
// SEC phase needs to run library constructors by hand.
ExtractGuidedSectionLibConstructor ();
LzmaDecompressLibConstructor ();
// Build HOBs to pass up our version of stuff the DXE Core needs to save space
BuildPeCoffLoaderHob ();
BuildExtractSectionHob (
&gLzmaCustomDecompressGuid,
LzmaGuidedSectionGetInfo,
LzmaGuidedSectionExtraction
);
// Assume the FV that contains the SEC (our code) also contains a compressed FV.
Status = DecompressFirstFv ();
ASSERT_EFI_ERROR (Status);
// Load the DXE Core and transfer control to it
Status = LoadDxeCoreFromFv (NULL, 0);
ASSERT_EFI_ERROR (Status);
}
/**
Reset the serial device.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The serial device could not be reset.
**/
EFI_STATUS
EFIAPI
SerialReset (
IN EFI_SERIAL_IO_PROTOCOL *This
)
{
EFI_STATUS Status;
EFI_TPL Tpl;
Status = SerialPortInitialize ();
if (EFI_ERROR(Status)) {
return Status;
}
//
// Set the Serial I/O mode and update the device path
//
Tpl = gBS->RaiseTPL (TPL_NOTIFY);
//
// Set the Serial I/O mode
//
This->Mode->ReceiveFifoDepth = 0;
This->Mode->Timeout = 1000000;
This->Mode->BaudRate = PcdGet64 (PcdUartDefaultBaudRate);
This->Mode->DataBits = (UINT32)PcdGet8 (PcdUartDefaultDataBits);
This->Mode->Parity = (UINT32)PcdGet8 (PcdUartDefaultParity);
This->Mode->StopBits = (UINT32)PcdGet8 (PcdUartDefaultStopBits);
//
// Check if the device path has actually changed
//
if (mDevicePath.Uart.BaudRate == This->Mode->BaudRate &&
mDevicePath.Uart.DataBits == (UINT8)This->Mode->DataBits &&
mDevicePath.Uart.Parity == (UINT8)This->Mode->Parity &&
mDevicePath.Uart.StopBits == (UINT8)This->Mode->StopBits
) {
gBS->RestoreTPL (Tpl);
return EFI_SUCCESS;
}
//
// Update the device path
//
mDevicePath.Uart.BaudRate = This->Mode->BaudRate;
mDevicePath.Uart.DataBits = (UINT8)This->Mode->DataBits;
mDevicePath.Uart.Parity = (UINT8)This->Mode->Parity;
mDevicePath.Uart.StopBits = (UINT8)This->Mode->StopBits;
Status = gBS->ReinstallProtocolInterface (
gHandle,
&gEfiDevicePathProtocolGuid,
&mDevicePath,
&mDevicePath
);
gBS->RestoreTPL (Tpl);
return Status;
}
VOID
PrePiMain (
IN UINTN UefiMemoryBase,
IN UINTN StacksBase,
IN UINT64 StartTimeStamp
)
{
EFI_HOB_HANDOFF_INFO_TABLE* HobList;
ARM_MP_CORE_INFO_PPI* ArmMpCoreInfoPpi;
UINTN ArmCoreCount;
ARM_CORE_INFO* ArmCoreInfoTable;
EFI_STATUS Status;
CHAR8 Buffer[100];
UINTN CharCount;
UINTN StacksSize;
// If ensure the FD is either part of the System Memory or totally outside of the System Memory (XIP)
ASSERT (IS_XIP() ||
((FixedPcdGet64 (PcdFdBaseAddress) >= FixedPcdGet64 (PcdSystemMemoryBase)) &&
((UINT64)(FixedPcdGet64 (PcdFdBaseAddress) + FixedPcdGet32 (PcdFdSize)) <= (UINT64)mSystemMemoryEnd)));
// Initialize the architecture specific bits
ArchInitialize ();
// Initialize the Serial Port
SerialPortInitialize ();
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"UEFI firmware (version %s built at %a on %a)\n\r",
(CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__);
SerialPortWrite ((UINT8 *) Buffer, CharCount);
// Initialize the Debug Agent for Source Level Debugging
InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
SaveAndSetDebugTimerInterrupt (TRUE);
// Declare the PI/UEFI memory region
HobList = HobConstructor (
(VOID*)UefiMemoryBase,
FixedPcdGet32 (PcdSystemMemoryUefiRegionSize),
(VOID*)UefiMemoryBase,
(VOID*)StacksBase // The top of the UEFI Memory is reserved for the stacks
);
PrePeiSetHobList (HobList);
// Initialize MMU and Memory HOBs (Resource Descriptor HOBs)
Status = MemoryPeim (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
ASSERT_EFI_ERROR (Status);
// Create the Stacks HOB (reserve the memory for all stacks)
if (ArmIsMpCore ()) {
StacksSize = PcdGet32 (PcdCPUCorePrimaryStackSize) +
((FixedPcdGet32 (PcdCoreCount) - 1) * FixedPcdGet32 (PcdCPUCoreSecondaryStackSize));
} else {
StacksSize = PcdGet32 (PcdCPUCorePrimaryStackSize);
}
BuildStackHob (StacksBase, StacksSize);
//TODO: Call CpuPei as a library
BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
if (ArmIsMpCore ()) {
// Only MP Core platform need to produce gArmMpCoreInfoPpiGuid
Status = GetPlatformPpi (&gArmMpCoreInfoPpiGuid, (VOID**)&ArmMpCoreInfoPpi);
// On MP Core Platform we must implement the ARM MP Core Info PPI (gArmMpCoreInfoPpiGuid)
ASSERT_EFI_ERROR (Status);
// Build the MP Core Info Table
ArmCoreCount = 0;
Status = ArmMpCoreInfoPpi->GetMpCoreInfo (&ArmCoreCount, &ArmCoreInfoTable);
if (!EFI_ERROR(Status) && (ArmCoreCount > 0)) {
// Build MPCore Info HOB
BuildGuidDataHob (&gArmMpCoreInfoGuid, ArmCoreInfoTable, sizeof (ARM_CORE_INFO) * ArmCoreCount);
}
}
// Set the Boot Mode
SetBootMode (ArmPlatformGetBootMode ());
// Initialize Platform HOBs (CpuHob and FvHob)
Status = PlatformPeim ();
ASSERT_EFI_ERROR (Status);
// Now, the HOB List has been initialized, we can register performance information
PERF_START (NULL, "PEI", NULL, StartTimeStamp);
// SEC phase needs to run library constructors by hand.
ExtractGuidedSectionLibConstructor ();
LzmaDecompressLibConstructor ();
// Build HOBs to pass up our version of stuff the DXE Core needs to save space
BuildPeCoffLoaderHob ();
BuildExtractSectionHob (
&gLzmaCustomDecompressGuid,
LzmaGuidedSectionGetInfo,
LzmaGuidedSectionExtraction
);
// Assume the FV that contains the SEC (our code) also contains a compressed FV.
Status = DecompressFirstFv ();
ASSERT_EFI_ERROR (Status);
// Load the DXE Core and transfer control to it
Status = LoadDxeCoreFromFv (NULL, 0);
ASSERT_EFI_ERROR (Status);
}
/**
Dispatch initialization request to sub status code devices based on
customized feature flags.
**/
VOID
InitializationDispatcherWorker (
VOID
)
{
EFI_PEI_HOB_POINTERS Hob;
EFI_STATUS Status;
MEMORY_STATUSCODE_PACKET_HEADER *PacketHeader;
MEMORY_STATUSCODE_RECORD *Record;
UINTN ExpectedPacketIndex;
UINTN Index;
VOID *HobStart;
//
// If enable UseSerial, then initialize serial port.
// if enable UseRuntimeMemory, then initialize runtime memory status code worker.
//
if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
//
// Call Serial Port Lib API to initialize serial port.
//
Status = SerialPortInitialize ();
ASSERT_EFI_ERROR (Status);
}
if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
Status = RtMemoryStatusCodeInitializeWorker ();
ASSERT_EFI_ERROR (Status);
}
//
// Replay Status code which saved in GUID'ed HOB to all supported devices.
//
if (FeaturePcdGet (PcdStatusCodeReplayIn)) {
//
// Journal GUID'ed HOBs to find all record entry, if found,
// then output record to support replay device.
//
ExpectedPacketIndex = 0;
Hob.Raw = GetFirstGuidHob (&gMemoryStatusCodeRecordGuid);
HobStart = Hob.Raw;
while (Hob.Raw != NULL) {
PacketHeader = (MEMORY_STATUSCODE_PACKET_HEADER *) GET_GUID_HOB_DATA (Hob.Guid);
if (PacketHeader->PacketIndex == ExpectedPacketIndex) {
Record = (MEMORY_STATUSCODE_RECORD *) (PacketHeader + 1);
for (Index = 0; Index < PacketHeader->RecordIndex; Index++) {
//
// Dispatch records to devices based on feature flag.
//
if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
SerialStatusCodeReportWorker (
Record[Index].CodeType,
Record[Index].Value,
Record[Index].Instance,
NULL,
NULL
);
}
if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
RtMemoryStatusCodeReportWorker (
Record[Index].CodeType,
Record[Index].Value,
Record[Index].Instance,
NULL,
NULL
);
}
}
ExpectedPacketIndex++;
//
// See whether there is gap of packet or not
//
if (HobStart != NULL) {
HobStart = NULL;
Hob.Raw = HobStart;
continue;
}
} else if (HobStart != NULL) {
//
// Cache the found packet for improve the performance
//
HobStart = Hob.Raw;
}
Hob.Raw = GetNextGuidHob (&gMemoryStatusCodeRecordGuid, Hob.Raw);
}
}
}