/**
Create an array of ACTIVE_OPTION elements for a boot option list.
@param[in] BootOptionList A boot option list, created with
BdsLibEnumerateAllBootOption().
@param[out] ActiveOption Pointer to the first element in the new array.
The caller is responsible for freeing the array
with FreePool() after use.
@param[out] Count Number of elements in the new array.
@retval RETURN_SUCCESS The ActiveOption array has been created.
@retval RETURN_NOT_FOUND No active entry has been found in
BootOptionList.
@retval RETURN_OUT_OF_RESOURCES Memory allocation failed.
**/
STATIC
RETURN_STATUS
CollectActiveOptions (
IN CONST LIST_ENTRY *BootOptionList,
OUT ACTIVE_OPTION **ActiveOption,
OUT UINTN *Count
)
{
UINTN ScanMode;
*ActiveOption = NULL;
//
// Scan the list twice:
// - count active entries,
// - store links to active entries.
//
for (ScanMode = 0; ScanMode < 2; ++ScanMode) {
CONST LIST_ENTRY *Link;
Link = BootOptionList->ForwardLink;
*Count = 0;
while (Link != BootOptionList) {
CONST BDS_COMMON_OPTION *Current;
Current = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
if (IS_LOAD_OPTION_TYPE (Current->Attribute, LOAD_OPTION_ACTIVE)) {
if (ScanMode == 1) {
(*ActiveOption)[*Count].BootOption = Current;
(*ActiveOption)[*Count].Appended = FALSE;
}
++*Count;
}
Link = Link->ForwardLink;
}
if (ScanMode == 0) {
if (*Count == 0) {
return RETURN_NOT_FOUND;
}
*ActiveOption = AllocatePool (*Count * sizeof **ActiveOption);
if (*ActiveOption == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
}
}
return RETURN_SUCCESS;
}
/**
The function will go through the driver option link list, load and start
every driver the driver option device path point to.
@param BdsDriverLists The header of the current driver option link list
**/
VOID
EFIAPI
BdsLibLoadDrivers (
IN LIST_ENTRY *BdsDriverLists
)
{
EFI_STATUS Status;
LIST_ENTRY *Link;
BDS_COMMON_OPTION *Option;
EFI_HANDLE ImageHandle;
EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;
UINTN ExitDataSize;
CHAR16 *ExitData;
BOOLEAN ReconnectAll;
ReconnectAll = FALSE;
//
// Process the driver option
//
for (Link = BdsDriverLists->ForwardLink; Link != BdsDriverLists; Link = Link->ForwardLink) {
Option = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
//
// If a load option is not marked as LOAD_OPTION_ACTIVE,
// the boot manager will not automatically load the option.
//
if (!IS_LOAD_OPTION_TYPE (Option->Attribute, LOAD_OPTION_ACTIVE)) {
continue;
}
//
// If a driver load option is marked as LOAD_OPTION_FORCE_RECONNECT,
// then all of the EFI drivers in the system will be disconnected and
// reconnected after the last driver load option is processed.
//
if (IS_LOAD_OPTION_TYPE (Option->Attribute, LOAD_OPTION_FORCE_RECONNECT)) {
ReconnectAll = TRUE;
}
//
// Make sure the driver path is connected.
//
BdsLibConnectDevicePath (Option->DevicePath);
//
// Load and start the image that Driver#### describes
//
Status = gBS->LoadImage (
FALSE,
gImageHandle,
Option->DevicePath,
NULL,
0,
&ImageHandle
);
if (!EFI_ERROR (Status)) {
gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &ImageInfo);
//
// Verify whether this image is a driver, if not,
// exit it and continue to parse next load option
//
if (ImageInfo->ImageCodeType != EfiBootServicesCode && ImageInfo->ImageCodeType != EfiRuntimeServicesCode) {
gBS->Exit (ImageHandle, EFI_INVALID_PARAMETER, 0, NULL);
continue;
}
if (Option->LoadOptionsSize != 0) {
ImageInfo->LoadOptionsSize = Option->LoadOptionsSize;
ImageInfo->LoadOptions = Option->LoadOptions;
}
//
// Before calling the image, enable the Watchdog Timer for
// the 5 Minute period
//
gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);
Status = gBS->StartImage (ImageHandle, &ExitDataSize, &ExitData);
DEBUG ((DEBUG_INFO | DEBUG_LOAD, "Driver Return Status = %r\n", Status));
//
// Clear the Watchdog Timer after the image returns
//
gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);
}
}
//
// Process the LOAD_OPTION_FORCE_RECONNECT driver option
//
if (ReconnectAll) {
BdsLibDisconnectAllEfi ();
BdsLibConnectAll ();
}
}
/**
The function will execute with as the platform policy, current policy
is driven by boot mode. IBV/OEM can customize this code for their specific
policy action.
@param DriverOptionList The header of the driver option link list
@param BootOptionList The header of the boot option link list
@param ProcessCapsules A pointer to ProcessCapsules()
@param BaseMemoryTest A pointer to BaseMemoryTest()
**/
VOID
EFIAPI
PlatformBdsPolicyBehavior (
IN LIST_ENTRY *DriverOptionList,
IN LIST_ENTRY *BootOptionList,
IN PROCESS_CAPSULES ProcessCapsules,
IN BASEM_MEMORY_TEST BaseMemoryTest
)
{
EFI_STATUS Status;
UINT16 Timeout;
EFI_EVENT UserInputDurationTime;
LIST_ENTRY *Link;
BDS_COMMON_OPTION *BootOption;
UINTN Index;
EFI_INPUT_KEY Key;
EFI_TPL OldTpl;
EFI_BOOT_MODE BootMode;
DEBUG ((EFI_D_INFO, "PlatformBdsPolicyBehavior\n"));
ConnectRootBridge ();
//
// Init the time out value
//
Timeout = PcdGet16 (PcdPlatformBootTimeOut);
//
// Load the driver option as the driver option list
//
PlatformBdsGetDriverOption (DriverOptionList);
//
// Get current Boot Mode
//
Status = BdsLibGetBootMode (&BootMode);
DEBUG ((EFI_D_ERROR, "Boot Mode:%x\n", BootMode));
//
// Go the different platform policy with different boot mode
// Notes: this part code can be change with the table policy
//
ASSERT (BootMode == BOOT_WITH_FULL_CONFIGURATION);
//
// Connect platform console
//
Status = PlatformBdsConnectConsole (gPlatformConsole);
if (EFI_ERROR (Status)) {
//
// Here OEM/IBV can customize with defined action
//
PlatformBdsNoConsoleAction ();
}
//
// Create a 300ms duration event to ensure user has enough input time to enter Setup
//
Status = gBS->CreateEvent (
EVT_TIMER,
0,
NULL,
NULL,
&UserInputDurationTime
);
ASSERT (Status == EFI_SUCCESS);
Status = gBS->SetTimer (UserInputDurationTime, TimerRelative, 3000000);
ASSERT (Status == EFI_SUCCESS);
//
// Memory test and Logo show
//
PlatformBdsDiagnostics (IGNORE, TRUE, BaseMemoryTest);
//
// Perform some platform specific connect sequence
//
PlatformBdsConnectSequence ();
//
// In BOOT_WITH_FULL_CONFIGURATION boot mode, should always connect every device
// and do enumerate all the default boot options. But in development system board, the boot mode
// cannot be BOOT_ASSUMING_NO_CONFIGURATION_CHANGES because the machine box
// is always open. So the following code only do the ConnectAll and EnumerateAll at first boot.
//
Status = BdsLibBuildOptionFromVar (BootOptionList, L"BootOrder");
if (EFI_ERROR(Status)) {
//
// If cannot find "BootOrder" variable, it may be first boot.
// Try to connect all devices and enumerate all boot options here.
//
BdsLibConnectAll ();
BdsLibEnumerateAllBootOption (BootOptionList);
}
//
// To give the User a chance to enter Setup here, if user set TimeOut is 0.
// BDS should still give user a chance to enter Setup
//
// Connect first boot option, and then check user input before exit
//
for (Link = BootOptionList->ForwardLink; Link != BootOptionList;Link = Link->ForwardLink) {
BootOption = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
if (!IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE)) {
//
// skip the header of the link list, becuase it has no boot option
//
continue;
} else {
//
// Make sure the boot option device path connected, but ignore the BBS device path
//
if (DevicePathType (BootOption->DevicePath) != BBS_DEVICE_PATH) {
BdsLibConnectDevicePath (BootOption->DevicePath);
}
break;
}
}
//
// Check whether the user input after the duration time has expired
//
OldTpl = EfiGetCurrentTpl();
gBS->RestoreTPL (TPL_APPLICATION);
gBS->WaitForEvent (1, &UserInputDurationTime, &Index);
gBS->CloseEvent (UserInputDurationTime);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
gBS->RaiseTPL (OldTpl);
if (!EFI_ERROR (Status)) {
//
// Enter Setup if user input
//
Timeout = 0xffff;
PlatformBdsEnterFrontPage (Timeout, FALSE);
}
}
VOID
EFIAPI
PlatformBdsPolicyBehavior (
IN OUT LIST_ENTRY *DriverOptionList,
IN OUT LIST_ENTRY *BootOptionList,
IN PROCESS_CAPSULES ProcessCapsules,
IN BASEM_MEMORY_TEST BaseMemoryTest
)
/*++
Routine Description:
The function will excute with as the platform policy, current policy
is driven by boot mode. IBV/OEM can customize this code for their specific
policy action.
Arguments:
DriverOptionList - The header of the driver option link list
BootOptionList - The header of the boot option link list
ProcessCapsules - A pointer to ProcessCapsules()
BaseMemoryTest - A pointer to BaseMemoryTest()
Returns:
None.
--*/
{
EFI_STATUS Status;
UINT16 Timeout;
EFI_EVENT UserInputDurationTime;
LIST_ENTRY *Link;
BDS_COMMON_OPTION *BootOption;
UINTN Index;
EFI_INPUT_KEY Key;
EFI_TPL OldTpl;
EFI_BOOT_MODE BootMode;
VBoxLogFlowFuncEnter();
ConnectRootBridge ();
if (PcdGetBool (PcdOvmfFlashVariablesEnable)) {
DEBUG ((EFI_D_INFO, "PlatformBdsPolicyBehavior: not restoring NvVars "
"from disk since flash variables appear to be supported.\n"));
} else {
//
// Try to restore variables from the hard disk early so
// they can be used for the other BDS connect operations.
//
PlatformBdsRestoreNvVarsFromHardDisk ();
}
//
// Init the time out value
//
Timeout = PcdGet16 (PcdPlatformBootTimeOut);
//
// Load the driver option as the driver option list
//
PlatformBdsGetDriverOption (DriverOptionList);
//
// Get current Boot Mode
//
Status = BdsLibGetBootMode (&BootMode);
DEBUG ((EFI_D_ERROR, "Boot Mode:%x\n", BootMode));
//
// Go the different platform policy with different boot mode
// Notes: this part code can be change with the table policy
//
ASSERT (BootMode == BOOT_WITH_FULL_CONFIGURATION);
//
// Connect platform console
//
Status = PlatformBdsConnectConsole (gPlatformConsole);
if (EFI_ERROR (Status)) {
//
// Here OEM/IBV can customize with defined action
//
PlatformBdsNoConsoleAction ();
}
//
// Create a 300ms duration event to ensure user has enough input time to enter Setup
//
Status = gBS->CreateEvent (
EVT_TIMER,
0,
NULL,
NULL,
&UserInputDurationTime
);
ASSERT (Status == EFI_SUCCESS);
Status = gBS->SetTimer (UserInputDurationTime, TimerRelative, 3000000);
ASSERT (Status == EFI_SUCCESS);
//
// Memory test and Logo show
//
PlatformBdsDiagnostics (IGNORE, TRUE, BaseMemoryTest);
//
// Perform some platform specific connect sequence
//
PlatformBdsConnectSequence ();
//
// Process QEMU's -kernel command line option
//
TryRunningQemuKernel ();
//
// Give one chance to enter the setup if we
// have the time out
//
if (Timeout != 0) {
//PlatformBdsEnterFrontPage (Timeout, FALSE);
}
DEBUG ((EFI_D_INFO, "BdsLibConnectAll\n"));
BdsLibConnectAll ();
#ifdef VBOX
{
UINTN cFileSystem = 0;
EFI_HANDLE *phFileSystem = NULL;
BDS_COMMON_OPTION *BootOption0080 = NULL;
EFI_STATUS rc = EFI_SUCCESS;
DEBUG ((EFI_D_INFO, "------------------ VBox Platform Specific Initialization Start -----------------------\n"));
BootOption0080 = BdsLibVariableToOption(BootOptionList, L"Boot0080");
if (!BootOption0080)
{
rc = gBS->LocateHandleBuffer (ByProtocol,
&gEfiSimpleFileSystemProtocolGuid,
NULL,
&cFileSystem,
&phFileSystem);
VBoxLogFlowFuncMarkRC(rc);
VBoxLogFlowFuncMarkVar(cFileSystem, "%d");
if ( rc == EFI_SUCCESS
&& cFileSystem > 0)
{
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *pFSVolume;
EFI_FILE_HANDLE hFSRoot;
EFI_FILE_HANDLE hBootEfiFile;
UINTN iFileSystem = 0;
/* Ok, we've found several simple file system handles
* 1. we should find if '\\System\\Library\\CoreServices\\boot.efi' present
* 2. Alter 'BootOrder' to include this file in boot sequence.
*/
for (iFileSystem = 0; iFileSystem < cFileSystem; ++iFileSystem)
{
EFI_DEVICE_PATH_PROTOCOL *pDevicePath = NULL;
/* mount and look up the boot.efi */
rc = gBS->HandleProtocol (phFileSystem[iFileSystem],
&gEfiSimpleFileSystemProtocolGuid,
(VOID *) &pFSVolume);
VBoxLogFlowFuncMarkVar(iFileSystem, "%d");
VBoxLogFlowFuncMarkRC(rc);
if (EFI_ERROR(rc))
continue;
rc = pFSVolume->OpenVolume(pFSVolume, &hFSRoot);
VBoxLogFlowFuncMarkRC(rc);
if (EFI_ERROR(rc))
continue;
rc = hFSRoot->Open(hFSRoot, &hBootEfiFile, L"\\System\\Library\\CoreServices\\boot.efi", EFI_FILE_MODE_READ, 0);
VBoxLogFlowFuncMarkRC(rc);
if (EFI_ERROR(rc))
continue;
/* nice file is found and we have to register it */
pDevicePath = FileDevicePath(phFileSystem[iFileSystem], L"\\System\\Library\\CoreServices\\boot.efi");
VBoxLogFlowFuncMarkVar(pDevicePath,"%p");
if (!pDevicePath)
continue;
rc = BdsLibRegisterNewOption (BootOptionList, pDevicePath, L"Mac Boot", L"BootOrder");
VBoxLogFlowFuncMarkRC(rc);
}
}
}
else
{
VBoxLogFlowFuncMarkVar(BootOption0080->LoadOptionsSize, "%d");
if (BootOption0080->LoadOptionsSize)
VBoxLogFlowFuncMarkVar(BootOption0080->LoadOptions, "%s");
#if 0
/* Boot0080 option is found */
UINT16 *BootOrder;
UINTN BootOrderSize;
UINTN Index = 0;
CHAR16 *BootOptionName;
ASSERT(BootOption0080->Signature == BDS_LOAD_OPTION_SIGNATURE);
BootOrder = BdsLibGetVariableAndSize (
L"BootOrder",
&gEfiGlobalVariableGuid,
&BootOrderSize);
ASSERT(BootOrder);
BootOptionName = AllocateRuntimePool(256 * sizeof(UINT16));
UnicodeSPrint(BootOptionName, 256 * sizeof(UINT16), L"Boot%04x", BootOrder[Index]);
BootOption0080->OptionName = BootOptionName;
rc = gRT->SetVariable(BootOptionName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(BDS_COMMON_OPTION),
BootOption0080);
LogFlowFuncMarkRC(rc);
#if 0
rc = BdsLibRegisterNewOption (BootOptionList, BootOption0080->DevicePath, L"Mac Boot Temp", L"BootOrder");
#endif
LogFlowFuncMarkRC(rc);
#endif
}
DEBUG ((EFI_D_INFO, "------------------ VBox Platform Specific Initialization End -----------------------\n"));
}
#endif
BdsLibEnumerateAllBootOption (BootOptionList);
SetBootOrderFromQemu (BootOptionList);
//
// The BootOrder variable may have changed, reload the in-memory list with
// it.
//
BdsLibBuildOptionFromVar (BootOptionList, L"BootOrder");
//
// To give the User a chance to enter Setup here, if user set TimeOut is 0.
// BDS should still give user a chance to enter Setup
//
// Connect first boot option, and then check user input before exit
//
for (Link = BootOptionList->ForwardLink; Link != BootOptionList;Link = Link->ForwardLink) {
BootOption = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
if (!IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE)) {
//
// skip the header of the link list, becuase it has no boot option
//
continue;
} else {
//
// Make sure the boot option device path connected, but ignore the BBS device path
//
if (DevicePathType (BootOption->DevicePath) != BBS_DEVICE_PATH) {
BdsLibConnectDevicePath (BootOption->DevicePath);
}
break;
}
}
//
// Check whether the user input after the duration time has expired
//
OldTpl = EfiGetCurrentTpl();
gBS->RestoreTPL (TPL_APPLICATION);
gBS->WaitForEvent (1, &UserInputDurationTime, &Index);
gBS->CloseEvent (UserInputDurationTime);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
gBS->RaiseTPL (OldTpl);
if (!EFI_ERROR (Status)) {
//
// Enter Setup if user input
//
Timeout = 0xffff;
PlatformBdsEnterFrontPage (Timeout, FALSE);
}
VBoxLogFlowFuncLeave();
return ;
}
/**
This function attempts to boot for the boot order specified
by platform policy.
**/
VOID
BdsBootDeviceSelect (
VOID
)
{
EFI_STATUS Status;
LIST_ENTRY *Link;
BDS_COMMON_OPTION *BootOption;
UINTN ExitDataSize;
CHAR16 *ExitData;
UINT16 Timeout;
LIST_ENTRY BootLists;
CHAR16 Buffer[20];
BOOLEAN BootNextExist;
LIST_ENTRY *LinkBootNext;
EFI_EVENT ConnectConInEvent;
//
// Got the latest boot option
//
BootNextExist = FALSE;
LinkBootNext = NULL;
ConnectConInEvent = NULL;
InitializeListHead (&BootLists);
//
// First check the boot next option
//
ZeroMem (Buffer, sizeof (Buffer));
//
// Create Event to signal ConIn connection request
//
if (PcdGetBool (PcdConInConnectOnDemand)) {
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
BdsEmptyCallbackFunction,
NULL,
&gConnectConInEventGuid,
&ConnectConInEvent
);
if (EFI_ERROR(Status)) {
ConnectConInEvent = NULL;
}
}
if (mBootNext != NULL) {
//
// Indicate we have the boot next variable, so this time
// boot will always have this boot option
//
BootNextExist = TRUE;
//
// Clear the this variable so it's only exist in this time boot
//
Status = gRT->SetVariable (
L"BootNext",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
0,
NULL
);
//
// Deleting variable with current variable implementation shouldn't fail.
//
ASSERT_EFI_ERROR (Status);
//
// Add the boot next boot option
//
UnicodeSPrint (Buffer, sizeof (Buffer), L"Boot%04x", *mBootNext);
BootOption = BdsLibVariableToOption (&BootLists, Buffer);
//
// If fail to get boot option from variable, just return and do nothing.
//
if (BootOption == NULL) {
return;
}
BootOption->BootCurrent = *mBootNext;
}
//
// Parse the boot order to get boot option
//
BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
//
// When we didn't have chance to build boot option variables in the first
// full configuration boot (e.g.: Reset in the first page or in Device Manager),
// we have no boot options in the following mini configuration boot.
// Give the last chance to enumerate the boot options.
//
if (IsListEmpty (&BootLists)) {
BdsLibEnumerateAllBootOption (&BootLists);
}
Link = BootLists.ForwardLink;
//
// Parameter check, make sure the loop will be valid
//
if (Link == NULL) {
return ;
}
//
// Here we make the boot in a loop, every boot success will
// return to the front page
//
for (;;) {
//
// Check the boot option list first
//
if (Link == &BootLists) {
//
// When LazyConIn enabled, signal connect ConIn event before enter UI
//
if (PcdGetBool (PcdConInConnectOnDemand) && ConnectConInEvent != NULL) {
gBS->SignalEvent (ConnectConInEvent);
}
//
// There are two ways to enter here:
// 1. There is no active boot option, give user chance to
// add new boot option
// 2. All the active boot option processed, and there is no
// one is success to boot, then we back here to allow user
// add new active boot option
//
Timeout = 0xffff;
PlatformBdsEnterFrontPage (Timeout, FALSE);
InitializeListHead (&BootLists);
BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
Link = BootLists.ForwardLink;
continue;
}
//
// Get the boot option from the link list
//
BootOption = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
//
// According to EFI Specification, if a load option is not marked
// as LOAD_OPTION_ACTIVE, the boot manager will not automatically
// load the option.
//
if (!IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE)) {
//
// skip the header of the link list, because it has no boot option
//
Link = Link->ForwardLink;
continue;
}
//
// Make sure the boot option device path connected,
// but ignore the BBS device path
//
if (DevicePathType (BootOption->DevicePath) != BBS_DEVICE_PATH) {
//
// Notes: the internal shell can not been connected with device path
// so we do not check the status here
//
BdsLibConnectDevicePath (BootOption->DevicePath);
}
//
// Restore to original mode before launching boot option.
//
BdsSetConsoleMode (FALSE);
//
// All the driver options should have been processed since
// now boot will be performed.
//
Status = BdsLibBootViaBootOption (BootOption, BootOption->DevicePath, &ExitDataSize, &ExitData);
if (Status != EFI_SUCCESS) {
//
// Call platform action to indicate the boot fail
//
BootOption->StatusString = GetStringById (STRING_TOKEN (STR_BOOT_FAILED));
PlatformBdsBootFail (BootOption, Status, ExitData, ExitDataSize);
//
// Check the next boot option
//
Link = Link->ForwardLink;
} else {
//
// Call platform action to indicate the boot success
//
BootOption->StatusString = GetStringById (STRING_TOKEN (STR_BOOT_SUCCEEDED));
PlatformBdsBootSuccess (BootOption);
//
// Boot success, then stop process the boot order, and
// present the boot manager menu, front page
//
//
// When LazyConIn enabled, signal connect ConIn Event before enter UI
//
if (PcdGetBool (PcdConInConnectOnDemand) && ConnectConInEvent != NULL) {
gBS->SignalEvent (ConnectConInEvent);
}
Timeout = 0xffff;
PlatformBdsEnterFrontPage (Timeout, FALSE);
//
// Rescan the boot option list, avoid potential risk of the boot
// option change in front page
//
if (BootNextExist) {
LinkBootNext = BootLists.ForwardLink;
}
InitializeListHead (&BootLists);
if (LinkBootNext != NULL) {
//
// Reserve the boot next option
//
InsertTailList (&BootLists, LinkBootNext);
}
BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
Link = BootLists.ForwardLink;
}
}
}
