/**
Validate variables.
If found the device path is not a valid device path, remove the variable.
**/
VOID
BdsFormalizeEfiGlobalVariable (
VOID
)
{
//
// Validate Console variable.
//
BdsFormalizeConsoleVariable (L"ConIn");
BdsFormalizeConsoleVariable (L"ConOut");
BdsFormalizeConsoleVariable (L"ErrOut");
}
/**
Validate variables.
**/
VOID
BdsFormalizeEfiGlobalVariable (
VOID
)
{
//
// Validate Console variable.
//
BdsFormalizeConsoleVariable (L"ConIn");
BdsFormalizeConsoleVariable (L"ConOut");
BdsFormalizeConsoleVariable (L"ErrOut");
//
// Validate OSIndication related variable.
//
BdsFormalizeOSIndicationVariable ();
}
/**
Formalize Bds global variables.
1. For ConIn/ConOut/ConErr, if found the device path is not a valid device path, remove the variable.
2. For OsIndicationsSupported, Create a BS/RT/UINT64 variable to report caps
3. Delete OsIndications variable if it is not NV/BS/RT UINT64
Item 3 is used to solve case when OS corrupts OsIndications. Here simply delete this NV variable.
**/
VOID
BdsFormalizeEfiGlobalVariable (
VOID
)
{
EFI_STATUS Status;
UINT64 OsIndicationSupport;
UINT64 OsIndication;
UINTN DataSize;
UINT32 Attributes;
//
// Validate Console variable.
//
BdsFormalizeConsoleVariable (L"ConIn");
BdsFormalizeConsoleVariable (L"ConOut");
BdsFormalizeConsoleVariable (L"ErrOut");
//
// OS indicater support variable
//
OsIndicationSupport = EFI_OS_INDICATIONS_BOOT_TO_FW_UI \
| EFI_OS_INDICATIONS_FMP_CAPSULE_SUPPORTED;
BdsDxeSetVariableAndReportStatusCodeOnError (
L"OsIndicationsSupported",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(UINT64),
&OsIndicationSupport
);
//
// If OsIndications is invalid, remove it.
// Invalid case
// 1. Data size != UINT64
// 2. OsIndication value inconsistence
// 3. OsIndication attribute inconsistence
//
OsIndication = 0;
Attributes = 0;
DataSize = sizeof(UINT64);
Status = gRT->GetVariable (
L"OsIndications",
&gEfiGlobalVariableGuid,
&Attributes,
&DataSize,
&OsIndication
);
if (!EFI_ERROR(Status)) {
if (DataSize != sizeof(UINT64) ||
(OsIndication & ~OsIndicationSupport) != 0 ||
Attributes != (EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE)){
DEBUG ((EFI_D_ERROR, "Unformalized OsIndications variable exists. Delete it\n"));
Status = gRT->SetVariable (
L"OsIndications",
&gEfiGlobalVariableGuid,
0,
0,
NULL
);
//
// Deleting variable with current variable implementation shouldn't fail.
//
ASSERT_EFI_ERROR (Status);
}
}
}
