/** @file * * Copyright (c) 2011-2014, ARM Limited. All rights reserved. * * This program and the accompanying materials * are licensed and made available under the terms and conditions of the BSD License * which accompanies this distribution. The full text of the license may be found at * http://opensource.org/licenses/bsd-license.php * * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. * **/ #include "BdsInternal.h" #include #include #include #include #include #include #include #include #define IS_DEVICE_PATH_NODE(node,type,subtype) (((node)->Type == (type)) && ((node)->SubType == (subtype))) /* Type and defines to set up the DHCP4 options */ typedef struct { EFI_DHCP4_PACKET_OPTION Head; UINT8 Route; } DHCP4_OPTION; #define DHCP_TAG_PARA_LIST 55 #define DHCP_TAG_NETMASK 1 #define DHCP_TAG_ROUTER 3 /* Constant strings and define related to the message indicating the amount of progress in the dowloading of a TFTP file. */ // Frame for the progression slider STATIC CONST CHAR16 mTftpProgressFrame[] = L"[ ]"; // Number of steps in the progression slider #define TFTP_PROGRESS_SLIDER_STEPS ((sizeof (mTftpProgressFrame) / sizeof (CHAR16)) - 3) // Size in number of characters plus one (final zero) of the message to // indicate the progress of a tftp download. The format is "[(progress slider: // 40 characters)] (nb of KBytes downloaded so far: 7 characters) Kb". There // are thus the number of characters in mTftpProgressFrame[] plus 11 characters // (2 // spaces, "Kb" and seven characters for the number of KBytes). #define TFTP_PROGRESS_MESSAGE_SIZE ((sizeof (mTftpProgressFrame) / sizeof (CHAR16)) + 12) // String to delete the tftp progress message to be able to update it : // (TFTP_PROGRESS_MESSAGE_SIZE-1) '\b' STATIC CONST CHAR16 mTftpProgressDelete[] = L"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"; // Extract the FilePath from the Device Path CHAR16* BdsExtractFilePathFromDevicePath ( IN CONST CHAR16 *StrDevicePath, IN UINTN NumberDevicePathNode ) { UINTN Node; CHAR16 *Str; Str = (CHAR16*)StrDevicePath; Node = 0; while ((Str != NULL) && (*Str != L'\0') && (Node < NumberDevicePathNode)) { if ((*Str == L'/') || (*Str == L'\\')) { Node++; } Str++; } if (*Str == L'\0') { return NULL; } else { return Str; } } BOOLEAN BdsIsRemovableUsb ( IN EFI_DEVICE_PATH* DevicePath ) { return ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) && ((DevicePathSubType (DevicePath) == MSG_USB_CLASS_DP) || (DevicePathSubType (DevicePath) == MSG_USB_WWID_DP))); } EFI_STATUS BdsGetDeviceUsb ( IN EFI_DEVICE_PATH* RemovableDevicePath, OUT EFI_HANDLE* DeviceHandle, OUT EFI_DEVICE_PATH** NewDevicePath ) { EFI_STATUS Status; UINTN Index; UINTN UsbIoHandleCount; EFI_HANDLE *UsbIoBuffer; EFI_DEVICE_PATH* UsbIoDevicePath; EFI_DEVICE_PATH* TmpDevicePath; USB_WWID_DEVICE_PATH* WwidDevicePath1; USB_WWID_DEVICE_PATH* WwidDevicePath2; USB_CLASS_DEVICE_PATH* UsbClassDevicePath1; USB_CLASS_DEVICE_PATH* UsbClassDevicePath2; // Get all the UsbIo handles UsbIoHandleCount = 0; Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiUsbIoProtocolGuid, NULL, &UsbIoHandleCount, &UsbIoBuffer); if (EFI_ERROR (Status) || (UsbIoHandleCount == 0)) { return Status; } // Check if one of the handles matches the USB description for (Index = 0; Index < UsbIoHandleCount; Index++) { Status = gBS->HandleProtocol (UsbIoBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID **) &UsbIoDevicePath); if (!EFI_ERROR (Status)) { TmpDevicePath = UsbIoDevicePath; while (!IsDevicePathEnd (TmpDevicePath)) { // Check if the Device Path node is a USB Removable device Path node if (BdsIsRemovableUsb (TmpDevicePath)) { if (TmpDevicePath->SubType == MSG_USB_WWID_DP) { WwidDevicePath1 = (USB_WWID_DEVICE_PATH*)RemovableDevicePath; WwidDevicePath2 = (USB_WWID_DEVICE_PATH*)TmpDevicePath; if ((WwidDevicePath1->VendorId == WwidDevicePath2->VendorId) && (WwidDevicePath1->ProductId == WwidDevicePath2->ProductId) && (CompareMem (WwidDevicePath1+1, WwidDevicePath2+1, DevicePathNodeLength(WwidDevicePath1)-sizeof (USB_WWID_DEVICE_PATH)) == 0)) { *DeviceHandle = UsbIoBuffer[Index]; // Add the additional original Device Path Nodes (eg: FilePath Device Path Node) to the new Device Path *NewDevicePath = AppendDevicePath (UsbIoDevicePath, NextDevicePathNode (RemovableDevicePath)); return EFI_SUCCESS; } } else { UsbClassDevicePath1 = (USB_CLASS_DEVICE_PATH*)RemovableDevicePath; UsbClassDevicePath2 = (USB_CLASS_DEVICE_PATH*)TmpDevicePath; if ((UsbClassDevicePath1->VendorId != 0xFFFF) && (UsbClassDevicePath1->VendorId == UsbClassDevicePath2->VendorId) && (UsbClassDevicePath1->ProductId != 0xFFFF) && (UsbClassDevicePath1->ProductId == UsbClassDevicePath2->ProductId) && (UsbClassDevicePath1->DeviceClass != 0xFF) && (UsbClassDevicePath1->DeviceClass == UsbClassDevicePath2->DeviceClass) && (UsbClassDevicePath1->DeviceSubClass != 0xFF) && (UsbClassDevicePath1->DeviceSubClass == UsbClassDevicePath2->DeviceSubClass) && (UsbClassDevicePath1->DeviceProtocol != 0xFF) && (UsbClassDevicePath1->DeviceProtocol == UsbClassDevicePath2->DeviceProtocol)) { *DeviceHandle = UsbIoBuffer[Index]; // Add the additional original Device Path Nodes (eg: FilePath Device Path Node) to the new Device Path *NewDevicePath = AppendDevicePath (UsbIoDevicePath, NextDevicePathNode (RemovableDevicePath)); return EFI_SUCCESS; } } } TmpDevicePath = NextDevicePathNode (TmpDevicePath); } } } return EFI_NOT_FOUND; } BOOLEAN BdsIsRemovableHd ( IN EFI_DEVICE_PATH* DevicePath ) { return IS_DEVICE_PATH_NODE (DevicePath, MEDIA_DEVICE_PATH, MEDIA_HARDDRIVE_DP); } EFI_STATUS BdsGetDeviceHd ( IN EFI_DEVICE_PATH* RemovableDevicePath, OUT EFI_HANDLE* DeviceHandle, OUT EFI_DEVICE_PATH** NewDevicePath ) { EFI_STATUS Status; UINTN Index; UINTN PartitionHandleCount; EFI_HANDLE *PartitionBuffer; EFI_DEVICE_PATH* PartitionDevicePath; EFI_DEVICE_PATH* TmpDevicePath; HARDDRIVE_DEVICE_PATH* HardDriveDevicePath1; HARDDRIVE_DEVICE_PATH* HardDriveDevicePath2; // Get all the DiskIo handles PartitionHandleCount = 0; Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiDiskIoProtocolGuid, NULL, &PartitionHandleCount, &PartitionBuffer); if (EFI_ERROR (Status) || (PartitionHandleCount == 0)) { return Status; } // Check if one of the handles matches the Hard Disk Description for (Index = 0; Index < PartitionHandleCount; Index++) { Status = gBS->HandleProtocol (PartitionBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID **) &PartitionDevicePath); if (!EFI_ERROR (Status)) { TmpDevicePath = PartitionDevicePath; while (!IsDevicePathEnd (TmpDevicePath)) { // Check if the Device Path node is a HD Removable device Path node if (BdsIsRemovableHd (TmpDevicePath)) { HardDriveDevicePath1 = (HARDDRIVE_DEVICE_PATH*)RemovableDevicePath; HardDriveDevicePath2 = (HARDDRIVE_DEVICE_PATH*)TmpDevicePath; if ((HardDriveDevicePath1->SignatureType == HardDriveDevicePath2->SignatureType) && (CompareGuid ((EFI_GUID *)HardDriveDevicePath1->Signature, (EFI_GUID *)HardDriveDevicePath2->Signature) == TRUE) && (HardDriveDevicePath1->PartitionNumber == HardDriveDevicePath2->PartitionNumber)) { *DeviceHandle = PartitionBuffer[Index]; // Add the additional original Device Path Nodes (eg: FilePath Device Path Node) to the new Device Path *NewDevicePath = AppendDevicePath (PartitionDevicePath, NextDevicePathNode (RemovableDevicePath)); return EFI_SUCCESS; } } TmpDevicePath = NextDevicePathNode (TmpDevicePath); } } } return EFI_NOT_FOUND; } /*BOOLEAN BdsIsRemovableCdrom ( IN EFI_DEVICE_PATH* DevicePath ) { return IS_DEVICE_PATH_NODE (DevicePath, MEDIA_DEVICE_PATH, MEDIA_CDROM_DP); } EFI_STATUS BdsGetDeviceCdrom ( IN EFI_DEVICE_PATH* RemovableDevicePath, OUT EFI_HANDLE* DeviceHandle, OUT EFI_DEVICE_PATH** DevicePath ) { ASSERT(0); return EFI_UNSUPPORTED; }*/ typedef BOOLEAN (*BDS_IS_REMOVABLE) ( IN EFI_DEVICE_PATH* DevicePath ); typedef EFI_STATUS (*BDS_GET_DEVICE) ( IN EFI_DEVICE_PATH* RemovableDevicePath, OUT EFI_HANDLE* DeviceHandle, OUT EFI_DEVICE_PATH** DevicePath ); typedef struct { BDS_IS_REMOVABLE IsRemovable; BDS_GET_DEVICE GetDevice; } BDS_REMOVABLE_DEVICE_SUPPORT; BDS_REMOVABLE_DEVICE_SUPPORT RemovableDeviceSupport[] = { { BdsIsRemovableUsb, BdsGetDeviceUsb }, { BdsIsRemovableHd, BdsGetDeviceHd }, //{ BdsIsRemovableCdrom, BdsGetDeviceCdrom } }; STATIC BOOLEAN IsRemovableDevice ( IN EFI_DEVICE_PATH* DevicePath ) { UINTN Index; EFI_DEVICE_PATH* TmpDevicePath; TmpDevicePath = DevicePath; while (!IsDevicePathEnd (TmpDevicePath)) { for (Index = 0; Index < sizeof (RemovableDeviceSupport) / sizeof (BDS_REMOVABLE_DEVICE_SUPPORT); Index++) { if (RemovableDeviceSupport[Index].IsRemovable (TmpDevicePath)) { return TRUE; } } TmpDevicePath = NextDevicePathNode (TmpDevicePath); } return FALSE; } STATIC EFI_STATUS TryRemovableDevice ( IN EFI_DEVICE_PATH* DevicePath, OUT EFI_HANDLE* DeviceHandle, OUT EFI_DEVICE_PATH** NewDevicePath ) { EFI_STATUS Status; UINTN Index; EFI_DEVICE_PATH* TmpDevicePath; BDS_REMOVABLE_DEVICE_SUPPORT* RemovableDevice; EFI_DEVICE_PATH* RemovableDevicePath; BOOLEAN RemovableFound; RemovableDevice = NULL; RemovableDevicePath = NULL; RemovableFound = FALSE; TmpDevicePath = DevicePath; while (!IsDevicePathEnd (TmpDevicePath) && !RemovableFound) { for (Index = 0; Index < sizeof (RemovableDeviceSupport) / sizeof (BDS_REMOVABLE_DEVICE_SUPPORT); Index++) { RemovableDevice = &RemovableDeviceSupport[Index]; if (RemovableDevice->IsRemovable (TmpDevicePath)) { RemovableDevicePath = TmpDevicePath; RemovableFound = TRUE; break; } } TmpDevicePath = NextDevicePathNode (TmpDevicePath); } if (!RemovableFound) { return EFI_NOT_FOUND; } // Search into the current started drivers Status = RemovableDevice->GetDevice (RemovableDevicePath, DeviceHandle, NewDevicePath); if (Status == EFI_NOT_FOUND) { // Connect all the drivers BdsConnectAllDrivers (); // Search again into all the drivers Status = RemovableDevice->GetDevice (RemovableDevicePath, DeviceHandle, NewDevicePath); } return Status; } STATIC EFI_STATUS BdsConnectAndUpdateDevicePath ( IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath, OUT EFI_HANDLE *Handle, OUT EFI_DEVICE_PATH_PROTOCOL **RemainingDevicePath ) { EFI_DEVICE_PATH* Remaining; EFI_DEVICE_PATH* NewDevicePath; EFI_STATUS Status; EFI_HANDLE PreviousHandle; if ((DevicePath == NULL) || (*DevicePath == NULL) || (Handle == NULL)) { return EFI_INVALID_PARAMETER; } PreviousHandle = NULL; do { Remaining = *DevicePath; // The LocateDevicePath() function locates all devices on DevicePath that support Protocol and returns // the handle to the device that is closest to DevicePath. On output, the device path pointer is modified // to point to the remaining part of the device path Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &Remaining, Handle); if (!EFI_ERROR (Status)) { if (*Handle == PreviousHandle) { // // If no forward progress is made try invoking the Dispatcher. // A new FV may have been added to the system and new drivers // may now be found. // Status == EFI_SUCCESS means a driver was dispatched // Status == EFI_NOT_FOUND means no new drivers were dispatched // Status = gDS->Dispatch (); } if (!EFI_ERROR (Status)) { PreviousHandle = *Handle; // Recursive = FALSE: We do not want to start the whole device tree Status = gBS->ConnectController (*Handle, NULL, Remaining, FALSE); } } } while (!EFI_ERROR (Status) && !IsDevicePathEnd (Remaining)); if (!EFI_ERROR (Status)) { // Now, we have got the whole Device Path connected, call again ConnectController to ensure all the supported Driver // Binding Protocol are connected (such as DiskIo and SimpleFileSystem) Remaining = *DevicePath; Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &Remaining, Handle); if (!EFI_ERROR (Status)) { Status = gBS->ConnectController (*Handle, NULL, Remaining, FALSE); if (EFI_ERROR (Status)) { // If the last node is a Memory Map Device Path just return EFI_SUCCESS. if ((Remaining->Type == HARDWARE_DEVICE_PATH) && (Remaining->SubType == HW_MEMMAP_DP)) { Status = EFI_SUCCESS; } } } } else if (!IsDevicePathEnd (Remaining) && !IsRemovableDevice (Remaining)) { /*// If the remaining Device Path is a FilePath or MemoryMap then we consider the Device Path has been loaded correctly if ((Remaining->Type == MEDIA_DEVICE_PATH) && (Remaining->SubType == MEDIA_FILEPATH_DP)) { Status = EFI_SUCCESS; } else if ((Remaining->Type == HARDWARE_DEVICE_PATH) && (Remaining->SubType == HW_MEMMAP_DP)) { Status = EFI_SUCCESS; }*/ //TODO: Should we just return success and leave the caller decide if it is the expected RemainingPath Status = EFI_SUCCESS; } else { Status = TryRemovableDevice (*DevicePath, Handle, &NewDevicePath); if (!EFI_ERROR (Status)) { Status = BdsConnectAndUpdateDevicePath (&NewDevicePath, Handle, RemainingDevicePath); *DevicePath = NewDevicePath; return Status; } } if (RemainingDevicePath) { *RemainingDevicePath = Remaining; } return Status; } /** Connect a Device Path and return the handle of the driver that support this DevicePath @param DevicePath Device Path of the File to connect @param Handle Handle of the driver that support this DevicePath @param RemainingDevicePath Remaining DevicePath nodes that do not match the driver DevicePath @retval EFI_SUCCESS A driver that matches the Device Path has been found @retval EFI_NOT_FOUND No handles match the search. @retval EFI_INVALID_PARAMETER DevicePath or Handle is NULL **/ EFI_STATUS BdsConnectDevicePath ( IN EFI_DEVICE_PATH_PROTOCOL* DevicePath, OUT EFI_HANDLE *Handle, OUT EFI_DEVICE_PATH_PROTOCOL **RemainingDevicePath ) { return BdsConnectAndUpdateDevicePath (&DevicePath, Handle, RemainingDevicePath); } BOOLEAN BdsFileSystemSupport ( IN EFI_DEVICE_PATH *DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath ) { EFI_STATUS Status; EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FsProtocol; Status = gBS->HandleProtocol (Handle, &gEfiSimpleFileSystemProtocolGuid, (VOID **)&FsProtocol); return (!EFI_ERROR (Status) && IS_DEVICE_PATH_NODE (RemainingDevicePath, MEDIA_DEVICE_PATH, MEDIA_FILEPATH_DP)); } EFI_STATUS BdsFileSystemLoadImage ( IN OUT EFI_DEVICE_PATH **DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS *Image, OUT UINTN *ImageSize ) { EFI_STATUS Status; FILEPATH_DEVICE_PATH *FilePathDevicePath; EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FsProtocol; EFI_FILE_PROTOCOL *Fs; EFI_FILE_INFO *FileInfo; EFI_FILE_PROTOCOL *File; UINTN Size; ASSERT (IS_DEVICE_PATH_NODE (RemainingDevicePath, MEDIA_DEVICE_PATH, MEDIA_FILEPATH_DP)); FilePathDevicePath = (FILEPATH_DEVICE_PATH*)RemainingDevicePath; Status = gBS->OpenProtocol ( Handle, &gEfiSimpleFileSystemProtocolGuid, (VOID**)&FsProtocol, gImageHandle, Handle, EFI_OPEN_PROTOCOL_BY_DRIVER ); if (EFI_ERROR (Status)) { return Status; } // Try to Open the volume and get root directory Status = FsProtocol->OpenVolume (FsProtocol, &Fs); if (EFI_ERROR (Status)) { goto CLOSE_PROTOCOL; } Status = Fs->Open (Fs, &File, FilePathDevicePath->PathName, EFI_FILE_MODE_READ, 0); if (EFI_ERROR (Status)) { goto CLOSE_PROTOCOL; } Size = 0; File->GetInfo (File, &gEfiFileInfoGuid, &Size, NULL); FileInfo = AllocatePool (Size); Status = File->GetInfo (File, &gEfiFileInfoGuid, &Size, FileInfo); if (EFI_ERROR (Status)) { goto CLOSE_FILE; } // Get the file size Size = FileInfo->FileSize; if (ImageSize) { *ImageSize = Size; } FreePool (FileInfo); Status = gBS->AllocatePages (Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES(Size), Image); // Try to allocate in any pages if failed to allocate memory at the defined location if ((Status == EFI_OUT_OF_RESOURCES) && (Type != AllocateAnyPages)) { Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesCode, EFI_SIZE_TO_PAGES(Size), Image); } if (!EFI_ERROR (Status)) { Status = File->Read (File, &Size, (VOID*)(UINTN)(*Image)); } CLOSE_FILE: File->Close (File); CLOSE_PROTOCOL: gBS->CloseProtocol ( Handle, &gEfiSimpleFileSystemProtocolGuid, gImageHandle, Handle); return Status; } BOOLEAN BdsMemoryMapSupport ( IN EFI_DEVICE_PATH *DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath ) { return IS_DEVICE_PATH_NODE (DevicePath, HARDWARE_DEVICE_PATH, HW_MEMMAP_DP) || IS_DEVICE_PATH_NODE (RemainingDevicePath, HARDWARE_DEVICE_PATH, HW_MEMMAP_DP); } EFI_STATUS BdsMemoryMapLoadImage ( IN OUT EFI_DEVICE_PATH **DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS* Image, OUT UINTN *ImageSize ) { EFI_STATUS Status; MEMMAP_DEVICE_PATH* MemMapPathDevicePath; UINTN Size; if (IS_DEVICE_PATH_NODE (RemainingDevicePath, HARDWARE_DEVICE_PATH, HW_MEMMAP_DP)) { MemMapPathDevicePath = (MEMMAP_DEVICE_PATH*)RemainingDevicePath; } else { ASSERT (IS_DEVICE_PATH_NODE (*DevicePath, HARDWARE_DEVICE_PATH, HW_MEMMAP_DP)); MemMapPathDevicePath = (MEMMAP_DEVICE_PATH*)*DevicePath; } Size = MemMapPathDevicePath->EndingAddress - MemMapPathDevicePath->StartingAddress; if (Size == 0) { return EFI_INVALID_PARAMETER; } Status = gBS->AllocatePages (Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES(Size), Image); // Try to allocate in any pages if failed to allocate memory at the defined location if ((Status == EFI_OUT_OF_RESOURCES) && (Type != AllocateAnyPages)) { Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesCode, EFI_SIZE_TO_PAGES(Size), Image); } if (!EFI_ERROR (Status)) { CopyMem ((VOID*)(UINTN)(*Image), (CONST VOID*)(UINTN)MemMapPathDevicePath->StartingAddress, Size); if (ImageSize != NULL) { *ImageSize = Size; } } return Status; } BOOLEAN BdsFirmwareVolumeSupport ( IN EFI_DEVICE_PATH *DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath ) { return IS_DEVICE_PATH_NODE (RemainingDevicePath, MEDIA_DEVICE_PATH, MEDIA_PIWG_FW_FILE_DP); } EFI_STATUS BdsFirmwareVolumeLoadImage ( IN OUT EFI_DEVICE_PATH **DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS* Image, OUT UINTN *ImageSize ) { EFI_STATUS Status; EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol; EFI_GUID *FvNameGuid; EFI_SECTION_TYPE SectionType; EFI_FV_FILETYPE FvType; EFI_FV_FILE_ATTRIBUTES Attrib; UINT32 AuthenticationStatus; VOID* ImageBuffer; ASSERT (IS_DEVICE_PATH_NODE (RemainingDevicePath, MEDIA_DEVICE_PATH, MEDIA_PIWG_FW_FILE_DP)); Status = gBS->HandleProtocol (Handle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&FwVol); if (EFI_ERROR (Status)) { return Status; } FvNameGuid = EfiGetNameGuidFromFwVolDevicePathNode ((CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *)RemainingDevicePath); if (FvNameGuid == NULL) { Status = EFI_INVALID_PARAMETER; } SectionType = EFI_SECTION_PE32; AuthenticationStatus = 0; //Note: ReadSection at the opposite of ReadFile does not allow to pass ImageBuffer == NULL to get the size of the file. ImageBuffer = NULL; Status = FwVol->ReadSection ( FwVol, FvNameGuid, SectionType, 0, &ImageBuffer, ImageSize, &AuthenticationStatus ); if (!EFI_ERROR (Status)) { #if 0 // In case the buffer has some address requirements, we must copy the buffer to a buffer following the requirements if (Type != AllocateAnyPages) { Status = gBS->AllocatePages (Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES(*ImageSize),Image); if (!EFI_ERROR (Status)) { CopyMem ((VOID*)(UINTN)(*Image), ImageBuffer, *ImageSize); FreePool (ImageBuffer); } } #else // We must copy the buffer into a page allocations. Otherwise, the caller could call gBS->FreePages() on the pool allocation Status = gBS->AllocatePages (Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES(*ImageSize), Image); // Try to allocate in any pages if failed to allocate memory at the defined location if ((Status == EFI_OUT_OF_RESOURCES) && (Type != AllocateAnyPages)) { Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesCode, EFI_SIZE_TO_PAGES(*ImageSize), Image); } if (!EFI_ERROR (Status)) { CopyMem ((VOID*)(UINTN)(*Image), ImageBuffer, *ImageSize); FreePool (ImageBuffer); } #endif } else { // Try a raw file, since a PE32 SECTION does not exist Status = FwVol->ReadFile ( FwVol, FvNameGuid, NULL, ImageSize, &FvType, &Attrib, &AuthenticationStatus ); if (!EFI_ERROR (Status)) { Status = gBS->AllocatePages (Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES(*ImageSize), Image); // Try to allocate in any pages if failed to allocate memory at the defined location if ((Status == EFI_OUT_OF_RESOURCES) && (Type != AllocateAnyPages)) { Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesCode, EFI_SIZE_TO_PAGES(*ImageSize), Image); } if (!EFI_ERROR (Status)) { Status = FwVol->ReadFile ( FwVol, FvNameGuid, (VOID**)Image, ImageSize, &FvType, &Attrib, &AuthenticationStatus ); } } } return Status; } BOOLEAN BdsPxeSupport ( IN EFI_DEVICE_PATH* DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH* RemainingDevicePath ) { EFI_STATUS Status; EFI_PXE_BASE_CODE_PROTOCOL* PxeBcProtocol; if (!IsDevicePathEnd (RemainingDevicePath)) { return FALSE; } Status = gBS->HandleProtocol (Handle, &gEfiPxeBaseCodeProtocolGuid, (VOID **)&PxeBcProtocol); if (EFI_ERROR (Status)) { return FALSE; } else { return TRUE; } } EFI_STATUS BdsPxeLoadImage ( IN OUT EFI_DEVICE_PATH **DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS* Image, OUT UINTN *ImageSize ) { EFI_STATUS Status; EFI_LOAD_FILE_PROTOCOL *LoadFileProtocol; UINTN BufferSize; EFI_PXE_BASE_CODE_PROTOCOL *Pxe; // Get Load File Protocol attached to the PXE protocol Status = gBS->HandleProtocol (Handle, &gEfiLoadFileProtocolGuid, (VOID **)&LoadFileProtocol); if (EFI_ERROR (Status)) { return Status; } Status = LoadFileProtocol->LoadFile (LoadFileProtocol, RemainingDevicePath, TRUE, &BufferSize, NULL); if (Status == EFI_BUFFER_TOO_SMALL) { Status = gBS->AllocatePages (Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES(BufferSize), Image); if (EFI_ERROR (Status)) { return Status; } Status = LoadFileProtocol->LoadFile (LoadFileProtocol, RemainingDevicePath, TRUE, &BufferSize, (VOID*)(UINTN)(*Image)); if (!EFI_ERROR (Status) && (ImageSize != NULL)) { *ImageSize = BufferSize; } } if (Status == EFI_ALREADY_STARTED) { Status = gBS->LocateProtocol (&gEfiPxeBaseCodeProtocolGuid, NULL, (VOID **)&Pxe); if (!EFI_ERROR(Status)) { // If PXE is already started, we stop it Pxe->Stop (Pxe); // And we try again return BdsPxeLoadImage (DevicePath, Handle, RemainingDevicePath, Type, Image, ImageSize); } } return Status; } BOOLEAN BdsTftpSupport ( IN EFI_DEVICE_PATH *DevicePath, IN EFI_HANDLE Handle, IN EFI_DEVICE_PATH *RemainingDevicePath ) { EFI_STATUS Status; EFI_DEVICE_PATH *NextDevicePath; VOID *Interface; // Validate the Remaining Device Path if (IsDevicePathEnd (RemainingDevicePath)) { return FALSE; } if (!IS_DEVICE_PATH_NODE (RemainingDevicePath, MESSAGING_DEVICE_PATH, MSG_IPv4_DP) && !IS_DEVICE_PATH_NODE (RemainingDevicePath, MESSAGING_DEVICE_PATH, MSG_IPv6_DP)) { return FALSE; } NextDevicePath = NextDevicePathNode (RemainingDevicePath); if (IsDevicePathEnd (NextDevicePath)) { return FALSE; } if (!IS_DEVICE_PATH_NODE (NextDevicePath, MEDIA_DEVICE_PATH, MEDIA_FILEPATH_DP)) { return FALSE; } Status = gBS->HandleProtocol ( Handle, &gEfiDevicePathProtocolGuid, &Interface ); if (EFI_ERROR (Status)) { return FALSE; } // // Check that the controller (identified by its handle "Handle") supports the // MTFTPv4 Service Binding Protocol. If it does, it means that it supports the // EFI MTFTPv4 Protocol needed to download the image through TFTP. // Status = gBS->HandleProtocol ( Handle, &gEfiMtftp4ServiceBindingProtocolGuid, &Interface ); if (EFI_ERROR (Status)) { return FALSE; } return TRUE; } /** Worker function that get the size in numbers of bytes of a file from a TFTP server before to download the file. @param[in] Mtftp4 MTFTP4 protocol interface @param[in] FilePath Path of the file, Ascii encoded @param[out] FileSize Address where to store the file size in number of bytes. @retval EFI_SUCCESS The size of the file was returned. @retval !EFI_SUCCESS The size of the file was not returned. **/ STATIC EFI_STATUS Mtftp4GetFileSize ( IN EFI_MTFTP4_PROTOCOL *Mtftp4, IN CHAR8 *FilePath, OUT UINT64 *FileSize ) { EFI_STATUS Status; EFI_MTFTP4_OPTION ReqOpt[1]; EFI_MTFTP4_PACKET *Packet; UINT32 PktLen; EFI_MTFTP4_OPTION *TableOfOptions; EFI_MTFTP4_OPTION *Option; UINT32 OptCnt; UINT8 OptBuf[128]; ReqOpt[0].OptionStr = (UINT8*)"tsize"; OptBuf[0] = '0'; OptBuf[1] = 0; ReqOpt[0].ValueStr = OptBuf; Status = Mtftp4->GetInfo ( Mtftp4, NULL, (UINT8*)FilePath, NULL, 1, ReqOpt, &PktLen, &Packet ); if (EFI_ERROR (Status)) { goto Error; } Status = Mtftp4->ParseOptions ( Mtftp4, PktLen, Packet, (UINT32 *) &OptCnt, &TableOfOptions ); if (EFI_ERROR (Status)) { goto Error; } Option = TableOfOptions; while (OptCnt != 0) { if (AsciiStrnCmp ((CHAR8 *)Option->OptionStr, "tsize", 5) == 0) { *FileSize = AsciiStrDecimalToUint64 ((CHAR8 *)Option->ValueStr); break; } OptCnt--; Option++; } FreePool (TableOfOptions); if (OptCnt == 0) { Status = EFI_UNSUPPORTED; } Error : return Status; } /** Update the progress of a file download This procedure is called each time a new TFTP packet is received. @param[in] This MTFTP4 protocol interface @param[in] Token Parameters for the download of the file @param[in] PacketLen Length of the packet @param[in] Packet Address of the packet @retval EFI_SUCCESS All packets are accepted. **/ STATIC EFI_STATUS Mtftp4CheckPacket ( IN EFI_MTFTP4_PROTOCOL *This, IN EFI_MTFTP4_TOKEN *Token, IN UINT16 PacketLen, IN EFI_MTFTP4_PACKET *Packet ) { BDS_TFTP_CONTEXT *Context; CHAR16 Progress[TFTP_PROGRESS_MESSAGE_SIZE]; UINT64 NbOfKb; UINTN Index; UINTN LastStep; UINTN Step; UINT64 LastNbOf50Kb; UINT64 NbOf50Kb; if ((NTOHS (Packet->OpCode)) == EFI_MTFTP4_OPCODE_DATA) { Context = (BDS_TFTP_CONTEXT*)Token->Context; if (Context->DownloadedNbOfBytes == 0) { if (Context->FileSize > 0) { Print (L"%s 0 Kb", mTftpProgressFrame); } else { Print (L" 0 Kb"); } } // // The data is the packet are prepended with two UINT16 : // . OpCode = EFI_MTFTP4_OPCODE_DATA // . Block = the number of this block of data // Context->DownloadedNbOfBytes += PacketLen - sizeof (Packet->OpCode) - sizeof (Packet->Data.Block); NbOfKb = Context->DownloadedNbOfBytes / 1024; Progress[0] = L'\0'; if (Context->FileSize > 0) { LastStep = (Context->LastReportedNbOfBytes * TFTP_PROGRESS_SLIDER_STEPS) / Context->FileSize; Step = (Context->DownloadedNbOfBytes * TFTP_PROGRESS_SLIDER_STEPS) / Context->FileSize; if (Step > LastStep) { Print (mTftpProgressDelete); CopyMem (Progress, mTftpProgressFrame, sizeof mTftpProgressFrame); for (Index = 1; Index < Step; Index++) { Progress[Index] = L'='; } Progress[Step] = L'>'; UnicodeSPrint ( Progress + (sizeof (mTftpProgressFrame) / sizeof (CHAR16)) - 1, sizeof (Progress) - sizeof (mTftpProgressFrame), L" %7d Kb", NbOfKb ); Context->LastReportedNbOfBytes = Context->DownloadedNbOfBytes; } } else { // // Case when we do not know the size of the final file. // We print the updated size every 50KB of downloaded data // LastNbOf50Kb = Context->LastReportedNbOfBytes / (50*1024); NbOf50Kb = Context->DownloadedNbOfBytes / (50*1024); if (NbOf50Kb > LastNbOf50Kb) { Print (L"\b\b\b\b\b\b\b\b\b\b"); UnicodeSPrint (Progress, sizeof (Progress), L"%7d Kb", NbOfKb); Context->LastReportedNbOfBytes = Context->DownloadedNbOfBytes; } } if (Progress[0] != L'\0') { Print (L"%s", Progress); } } return EFI_SUCCESS; } /** Download an image from a TFTP server @param[in] DevicePath Device path of the TFTP boot option @param[in] ControllerHandle Handle of the network controller @param[in] RemainingDevicePath Device path of the TFTP boot option but the first node that identifies the network controller @param[in] Type Type to allocate memory pages @param[out] Image Address of the bufer where the image is stored in case of success @param[out] ImageSize Size in number of bytes of the i;age in case of success @retval EFI_SUCCESS The image was returned. @retval !EFI_SUCCESS Something went wrong. **/ EFI_STATUS BdsTftpLoadImage ( IN OUT EFI_DEVICE_PATH **DevicePath, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH *RemainingDevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS *Image, OUT UINTN *ImageSize ) { EFI_STATUS Status; EFI_HANDLE Dhcp4ChildHandle; EFI_DHCP4_PROTOCOL *Dhcp4; BOOLEAN Dhcp4ToStop; EFI_HANDLE Mtftp4ChildHandle; EFI_MTFTP4_PROTOCOL *Mtftp4; DHCP4_OPTION ParaList; EFI_DHCP4_PACKET_OPTION *OptionList[2]; EFI_DHCP4_CONFIG_DATA Dhcp4CfgData; EFI_DHCP4_MODE_DATA Dhcp4Mode; EFI_MTFTP4_CONFIG_DATA Mtftp4CfgData; IPv4_DEVICE_PATH *IPv4DevicePathNode; CHAR16 *PathName; CHAR8 *AsciiFilePath; EFI_MTFTP4_TOKEN Mtftp4Token; UINT64 FileSize; UINT64 TftpBufferSize; BDS_TFTP_CONTEXT *TftpContext; UINTN PathNameLen; ASSERT(IS_DEVICE_PATH_NODE (RemainingDevicePath, MESSAGING_DEVICE_PATH, MSG_IPv4_DP)); IPv4DevicePathNode = (IPv4_DEVICE_PATH*)RemainingDevicePath; Dhcp4ChildHandle = NULL; Dhcp4 = NULL; Dhcp4ToStop = FALSE; Mtftp4ChildHandle = NULL; Mtftp4 = NULL; AsciiFilePath = NULL; TftpContext = NULL; if (!IPv4DevicePathNode->StaticIpAddress) { // // Using the DHCP4 Service Binding Protocol, create a child handle of the DHCP4 service and // install the DHCP4 protocol on it. Then, open the DHCP protocol. // Status = NetLibCreateServiceChild ( ControllerHandle, gImageHandle, &gEfiDhcp4ServiceBindingProtocolGuid, &Dhcp4ChildHandle ); if (!EFI_ERROR (Status)) { Status = gBS->OpenProtocol ( Dhcp4ChildHandle, &gEfiDhcp4ProtocolGuid, (VOID **) &Dhcp4, gImageHandle, ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER ); } if (EFI_ERROR (Status)) { Print (L"Unable to open DHCP4 protocol\n"); goto Error; } } // // Using the MTFTP4 Service Binding Protocol, create a child handle of the MTFTP4 service and // install the MTFTP4 protocol on it. Then, open the MTFTP4 protocol. // Status = NetLibCreateServiceChild ( ControllerHandle, gImageHandle, &gEfiMtftp4ServiceBindingProtocolGuid, &Mtftp4ChildHandle ); if (!EFI_ERROR (Status)) { Status = gBS->OpenProtocol ( Mtftp4ChildHandle, &gEfiMtftp4ProtocolGuid, (VOID **) &Mtftp4, gImageHandle, ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER ); } if (EFI_ERROR (Status)) { Print (L"Unable to open MTFTP4 protocol\n"); goto Error; } if (!IPv4DevicePathNode->StaticIpAddress) { // // Configure the DHCP4, all default settings. It is acceptable for the configuration to // fail if the return code is equal to EFI_ACCESS_DENIED which means that the configuration // has been done by another instance of the DHCP4 protocol or that the DHCP configuration // process has been started but is not completed yet. // ZeroMem (&Dhcp4CfgData, sizeof (EFI_DHCP4_CONFIG_DATA)); ParaList.Head.OpCode = DHCP_TAG_PARA_LIST; ParaList.Head.Length = 2; ParaList.Head.Data[0] = DHCP_TAG_NETMASK; ParaList.Route = DHCP_TAG_ROUTER; OptionList[0] = &ParaList.Head; Dhcp4CfgData.OptionCount = 1; Dhcp4CfgData.OptionList = OptionList; Status = Dhcp4->Configure (Dhcp4, &Dhcp4CfgData); if (EFI_ERROR (Status)) { if (Status != EFI_ACCESS_DENIED) { Print (L"Error while configuring the DHCP4 protocol\n"); goto Error; } } // // Start the DHCP configuration. This may have already been done thus do not leave in error // if the return code is EFI_ALREADY_STARTED. // Status = Dhcp4->Start (Dhcp4, NULL); if (EFI_ERROR (Status)) { if (Status != EFI_ALREADY_STARTED) { Print (L"DHCP configuration failed\n"); goto Error; } } else { Dhcp4ToStop = TRUE; } Status = Dhcp4->GetModeData (Dhcp4, &Dhcp4Mode); if (EFI_ERROR (Status)) { goto Error; } if (Dhcp4Mode.State != Dhcp4Bound) { Status = EFI_TIMEOUT; Print (L"DHCP configuration failed\n"); goto Error; } } // // Configure the TFTP4 protocol // ZeroMem (&Mtftp4CfgData, sizeof (EFI_MTFTP4_CONFIG_DATA)); Mtftp4CfgData.UseDefaultSetting = FALSE; Mtftp4CfgData.TimeoutValue = 4; Mtftp4CfgData.TryCount = 6; if (IPv4DevicePathNode->StaticIpAddress) { CopyMem (&Mtftp4CfgData.StationIp , &IPv4DevicePathNode->LocalIpAddress, sizeof (EFI_IPv4_ADDRESS)); CopyMem (&Mtftp4CfgData.SubnetMask, &IPv4DevicePathNode->SubnetMask, sizeof (EFI_IPv4_ADDRESS)); CopyMem (&Mtftp4CfgData.GatewayIp , &IPv4DevicePathNode->GatewayIpAddress, sizeof (EFI_IPv4_ADDRESS)); } else { CopyMem (&Mtftp4CfgData.StationIp , &Dhcp4Mode.ClientAddress, sizeof (EFI_IPv4_ADDRESS)); CopyMem (&Mtftp4CfgData.SubnetMask, &Dhcp4Mode.SubnetMask , sizeof (EFI_IPv4_ADDRESS)); CopyMem (&Mtftp4CfgData.GatewayIp , &Dhcp4Mode.RouterAddress, sizeof (EFI_IPv4_ADDRESS)); } CopyMem (&Mtftp4CfgData.ServerIp , &IPv4DevicePathNode->RemoteIpAddress, sizeof (EFI_IPv4_ADDRESS)); Status = Mtftp4->Configure (Mtftp4, &Mtftp4CfgData); if (EFI_ERROR (Status)) { Print (L"Error while configuring the MTFTP4 protocol\n"); goto Error; } // The Device Path might contain multiple FilePath nodes PathName = ConvertDevicePathToText ((EFI_DEVICE_PATH_PROTOCOL*)(IPv4DevicePathNode + 1), FALSE, FALSE); PathNameLen = StrLen (PathName) + 1; AsciiFilePath = AllocatePool (PathNameLen); UnicodeStrToAsciiStrS (PathName, AsciiFilePath, PathNameLen); // // Try to get the size of the file in bytes from the server. If it fails, // start with a 8MB buffer to download the file. // FileSize = 0; if (Mtftp4GetFileSize (Mtftp4, AsciiFilePath, &FileSize) == EFI_SUCCESS) { TftpBufferSize = FileSize; } else { TftpBufferSize = SIZE_16MB; } TftpContext = AllocatePool (sizeof (BDS_TFTP_CONTEXT)); if (TftpContext == NULL) { Status = EFI_OUT_OF_RESOURCES; goto Error; } TftpContext->FileSize = FileSize; for (; TftpBufferSize <= FixedPcdGet32 (PcdMaxTftpFileSize); TftpBufferSize = (TftpBufferSize + SIZE_16MB) & (~(SIZE_16MB-1))) { // // Allocate a buffer to hold the whole file. // Status = gBS->AllocatePages ( Type, EfiBootServicesCode, EFI_SIZE_TO_PAGES (TftpBufferSize), Image ); if (EFI_ERROR (Status)) { Print (L"Failed to allocate space for image\n"); goto Error; } TftpContext->DownloadedNbOfBytes = 0; TftpContext->LastReportedNbOfBytes = 0; ZeroMem (&Mtftp4Token, sizeof (EFI_MTFTP4_TOKEN)); Mtftp4Token.Filename = (UINT8*)AsciiFilePath; Mtftp4Token.BufferSize = TftpBufferSize; Mtftp4Token.Buffer = (VOID *)(UINTN)*Image; Mtftp4Token.CheckPacket = Mtftp4CheckPacket; Mtftp4Token.Context = (VOID*)TftpContext; Print (L"Downloading the file <%a> from the TFTP server\n", AsciiFilePath); Status = Mtftp4->ReadFile (Mtftp4, &Mtftp4Token); Print (L"\n"); if (EFI_ERROR (Status)) { gBS->FreePages (*Image, EFI_SIZE_TO_PAGES (TftpBufferSize)); if (Status == EFI_BUFFER_TOO_SMALL) { Print (L"Downloading failed, file larger than expected.\n"); continue; } else { goto Error; } } *ImageSize = Mtftp4Token.BufferSize; break; } Error: if (Dhcp4ChildHandle != NULL) { if (Dhcp4 != NULL) { if (Dhcp4ToStop) { Dhcp4->Stop (Dhcp4); } gBS->CloseProtocol ( Dhcp4ChildHandle, &gEfiDhcp4ProtocolGuid, gImageHandle, ControllerHandle ); } NetLibDestroyServiceChild ( ControllerHandle, gImageHandle, &gEfiDhcp4ServiceBindingProtocolGuid, Dhcp4ChildHandle ); } if (Mtftp4ChildHandle != NULL) { if (Mtftp4 != NULL) { if (AsciiFilePath != NULL) { FreePool (AsciiFilePath); } if (TftpContext != NULL) { FreePool (TftpContext); } gBS->CloseProtocol ( Mtftp4ChildHandle, &gEfiMtftp4ProtocolGuid, gImageHandle, ControllerHandle ); } NetLibDestroyServiceChild ( ControllerHandle, gImageHandle, &gEfiMtftp4ServiceBindingProtocolGuid, Mtftp4ChildHandle ); } if (EFI_ERROR (Status)) { *Image = 0; Print (L"Failed to download the file - Error=%r\n", Status); } return Status; } BDS_FILE_LOADER FileLoaders[] = { { BdsFileSystemSupport, BdsFileSystemLoadImage }, { BdsFirmwareVolumeSupport, BdsFirmwareVolumeLoadImage }, //{ BdsLoadFileSupport, BdsLoadFileLoadImage }, { BdsMemoryMapSupport, BdsMemoryMapLoadImage }, { BdsPxeSupport, BdsPxeLoadImage }, { BdsTftpSupport, BdsTftpLoadImage }, { NULL, NULL } }; EFI_STATUS BdsLoadImageAndUpdateDevicePath ( IN OUT EFI_DEVICE_PATH **DevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS* Image, OUT UINTN *FileSize ) { EFI_STATUS Status; EFI_HANDLE Handle; EFI_DEVICE_PATH *RemainingDevicePath; BDS_FILE_LOADER* FileLoader; Status = BdsConnectAndUpdateDevicePath (DevicePath, &Handle, &RemainingDevicePath); if (EFI_ERROR (Status)) { return Status; } FileLoader = FileLoaders; while (FileLoader->Support != NULL) { if (FileLoader->Support (*DevicePath, Handle, RemainingDevicePath)) { return FileLoader->LoadImage (DevicePath, Handle, RemainingDevicePath, Type, Image, FileSize); } FileLoader++; } return EFI_UNSUPPORTED; } EFI_STATUS BdsLoadImage ( IN EFI_DEVICE_PATH *DevicePath, IN EFI_ALLOCATE_TYPE Type, IN OUT EFI_PHYSICAL_ADDRESS* Image, OUT UINTN *FileSize ) { return BdsLoadImageAndUpdateDevicePath (&DevicePath, Type, Image, FileSize); } /** Start an EFI Application from a Device Path @param ParentImageHandle Handle of the calling image @param DevicePath Location of the EFI Application @retval EFI_SUCCESS All drivers have been connected @retval EFI_NOT_FOUND The Linux kernel Device Path has not been found @retval EFI_OUT_OF_RESOURCES There is not enough resource memory to store the matching results. **/ EFI_STATUS BdsStartEfiApplication ( IN EFI_HANDLE ParentImageHandle, IN EFI_DEVICE_PATH_PROTOCOL *DevicePath, IN UINTN LoadOptionsSize, IN VOID* LoadOptions ) { EFI_STATUS Status; EFI_HANDLE ImageHandle; EFI_PHYSICAL_ADDRESS BinaryBuffer; UINTN BinarySize; EFI_LOADED_IMAGE_PROTOCOL* LoadedImage; // Find the nearest supported file loader Status = BdsLoadImageAndUpdateDevicePath (&DevicePath, AllocateAnyPages, &BinaryBuffer, &BinarySize); if (EFI_ERROR (Status)) { return Status; } // Load the image from the Buffer with Boot Services function Status = gBS->LoadImage (TRUE, ParentImageHandle, DevicePath, (VOID*)(UINTN)BinaryBuffer, BinarySize, &ImageHandle); if (EFI_ERROR (Status)) { return Status; } // Passed LoadOptions to the EFI Application if (LoadOptionsSize != 0) { Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &LoadedImage); if (EFI_ERROR (Status)) { return Status; } LoadedImage->LoadOptionsSize = LoadOptionsSize; LoadedImage->LoadOptions = LoadOptions; } // Before calling the image, enable the Watchdog Timer for the 5 Minute period gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL); // Start the image Status = gBS->StartImage (ImageHandle, NULL, NULL); // Clear the Watchdog Timer after the image returns gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL); return Status; }