/**
Measure main BIOS.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
MeasureMainBios (
VOID
)
{
EFI_STATUS Status;
UINT32 FvInstances;
EFI_PEI_FV_HANDLE VolumeHandle;
EFI_FV_INFO VolumeInfo;
EFI_PEI_FIRMWARE_VOLUME_PPI *FvPpi;
PERF_START_EX (mFileHandle, "EventRec", "TrEEPei", 0, PERF_ID_TREE_PEI);
FvInstances = 0;
while (TRUE) {
//
// Traverse all firmware volume instances of Static Core Root of Trust for Measurement
// (S-CRTM), this firmware volume measure policy can be modified/enhanced by special
// platform for special CRTM TPM measuring.
//
Status = PeiServicesFfsFindNextVolume (FvInstances, &VolumeHandle);
if (EFI_ERROR (Status)) {
break;
}
//
// Measure and record the firmware volume that is dispatched by PeiCore
//
Status = PeiServicesFfsGetVolumeInfo (VolumeHandle, &VolumeInfo);
ASSERT_EFI_ERROR (Status);
//
// Locate the corresponding FV_PPI according to founded FV's format guid
//
Status = PeiServicesLocatePpi (
&VolumeInfo.FvFormat,
0,
NULL,
(VOID**)&FvPpi
);
if (!EFI_ERROR (Status)) {
MeasureFvImage ((EFI_PHYSICAL_ADDRESS) (UINTN) VolumeInfo.FvStart, VolumeInfo.FvSize);
}
FvInstances++;
}
PERF_END_EX (mFileHandle, "EventRec", "TrEEPei", 0, PERF_ID_TREE_PEI + 1);
return EFI_SUCCESS;
}
/**
Searches DxeCore in all firmware Volumes and loads the first
instance that contains DxeCore.
@return FileHandle of DxeCore to load DxeCore.
**/
EFI_PEI_FILE_HANDLE
DxeIplFindDxeCore (
VOID
)
{
EFI_STATUS Status;
UINTN Instance;
EFI_PEI_FV_HANDLE VolumeHandle;
EFI_PEI_FILE_HANDLE FileHandle;
Instance = 0;
while (TRUE) {
//
// Traverse all firmware volume instances
//
Status = PeiServicesFfsFindNextVolume (Instance, &VolumeHandle);
//
// If some error occurs here, then we cannot find any firmware
// volume that may contain DxeCore.
//
if (EFI_ERROR (Status)) {
REPORT_STATUS_CODE (EFI_PROGRESS_CODE, (EFI_SOFTWARE_PEI_MODULE | EFI_SW_PEI_CORE_EC_DXE_CORRUPT));
}
ASSERT_EFI_ERROR (Status);
//
// Find the DxeCore file type from the beginning in this firmware volume.
//
FileHandle = NULL;
Status = PeiServicesFfsFindNextFile (EFI_FV_FILETYPE_DXE_CORE, VolumeHandle, &FileHandle);
if (!EFI_ERROR (Status)) {
//
// Find DxeCore FileHandle in this volume, then we skip other firmware volume and
// return the FileHandle.
//
return FileHandle;
}
//
// We cannot find DxeCore in this firmware volume, then search the next volume.
//
Instance++;
}
}
