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audk/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c

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/** @file
Library functions which relates with booting.
Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
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 "InternalBm.h"
EFI_RAM_DISK_PROTOCOL *mRamDisk = NULL;
EFI_BOOT_MANAGER_REFRESH_LEGACY_BOOT_OPTION mBmRefreshLegacyBootOption = NULL;
EFI_BOOT_MANAGER_LEGACY_BOOT mBmLegacyBoot = NULL;
///
/// This GUID is used for an EFI Variable that stores the front device pathes
/// for a partial device path that starts with the HD node.
///
EFI_GUID mBmHardDriveBootVariableGuid = { 0xfab7e9e1, 0x39dd, 0x4f2b, { 0x84, 0x08, 0xe2, 0x0e, 0x90, 0x6c, 0xb6, 0xde } };
EFI_GUID mBmAutoCreateBootOptionGuid = { 0x8108ac4e, 0x9f11, 0x4d59, { 0x85, 0x0e, 0xe2, 0x1a, 0x52, 0x2c, 0x59, 0xb2 } };
/**
The function registers the legacy boot support capabilities.
@param RefreshLegacyBootOption The function pointer to create all the legacy boot options.
@param LegacyBoot The function pointer to boot the legacy boot option.
**/
VOID
EFIAPI
EfiBootManagerRegisterLegacyBootSupport (
EFI_BOOT_MANAGER_REFRESH_LEGACY_BOOT_OPTION RefreshLegacyBootOption,
EFI_BOOT_MANAGER_LEGACY_BOOT LegacyBoot
)
{
mBmRefreshLegacyBootOption = RefreshLegacyBootOption;
mBmLegacyBoot = LegacyBoot;
}
/**
Return TRUE when the boot option is auto-created instead of manually added.
@param BootOption Pointer to the boot option to check.
@retval TRUE The boot option is auto-created.
@retval FALSE The boot option is manually added.
**/
BOOLEAN
BmIsAutoCreateBootOption (
EFI_BOOT_MANAGER_LOAD_OPTION *BootOption
)
{
if ((BootOption->OptionalDataSize == sizeof (EFI_GUID)) &&
CompareGuid ((EFI_GUID *) BootOption->OptionalData, &mBmAutoCreateBootOptionGuid)
) {
return TRUE;
} else {
return FALSE;
}
}
/**
Find the boot option in the NV storage and return the option number.
@param OptionToFind Boot option to be checked.
@return The option number of the found boot option.
**/
UINTN
BmFindBootOptionInVariable (
IN EFI_BOOT_MANAGER_LOAD_OPTION *OptionToFind
)
{
EFI_STATUS Status;
EFI_BOOT_MANAGER_LOAD_OPTION BootOption;
UINTN OptionNumber;
CHAR16 OptionName[BM_OPTION_NAME_LEN];
EFI_BOOT_MANAGER_LOAD_OPTION *BootOptions;
UINTN BootOptionCount;
UINTN Index;
OptionNumber = LoadOptionNumberUnassigned;
//
// Try to match the variable exactly if the option number is assigned
//
if (OptionToFind->OptionNumber != LoadOptionNumberUnassigned) {
UnicodeSPrint (
OptionName, sizeof (OptionName), L"%s%04x",
mBmLoadOptionName[OptionToFind->OptionType], OptionToFind->OptionNumber
);
Status = EfiBootManagerVariableToLoadOption (OptionName, &BootOption);
if (!EFI_ERROR (Status)) {
ASSERT (OptionToFind->OptionNumber == BootOption.OptionNumber);
if ((OptionToFind->Attributes == BootOption.Attributes) &&
(StrCmp (OptionToFind->Description, BootOption.Description) == 0) &&
(CompareMem (OptionToFind->FilePath, BootOption.FilePath, GetDevicePathSize (OptionToFind->FilePath)) == 0) &&
(OptionToFind->OptionalDataSize == BootOption.OptionalDataSize) &&
(CompareMem (OptionToFind->OptionalData, BootOption.OptionalData, OptionToFind->OptionalDataSize) == 0)
) {
OptionNumber = OptionToFind->OptionNumber;
}
EfiBootManagerFreeLoadOption (&BootOption);
}
}
//
// The option number assigned is either incorrect or unassigned.
//
if (OptionNumber == LoadOptionNumberUnassigned) {
BootOptions = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
Index = EfiBootManagerFindLoadOption (OptionToFind, BootOptions, BootOptionCount);
if (Index != -1) {
OptionNumber = BootOptions[Index].OptionNumber;
}
EfiBootManagerFreeLoadOptions (BootOptions, BootOptionCount);
}
return OptionNumber;
}
/**
Get the file buffer using a Memory Mapped Device Path.
FV address may change across reboot. This routine promises the FV file device path is right.
@param FilePath The Memory Mapped Device Path to get the file buffer.
@param FullPath Receive the updated FV Device Path pointint to the file.
@param FileSize Receive the file buffer size.
@return The file buffer.
**/
VOID *
BmGetFileBufferByFvFilePath (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
UINTN Index;
EFI_DEVICE_PATH_PROTOCOL *FvFileNode;
EFI_HANDLE FvHandle;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
UINT32 AuthenticationStatus;
UINTN FvHandleCount;
EFI_HANDLE *FvHandles;
EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
VOID *FileBuffer;
//
// Get the file buffer by using the exactly FilePath.
//
FvFileNode = FilePath;
Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &FvFileNode, &FvHandle);
if (!EFI_ERROR (Status)) {
FileBuffer = GetFileBufferByFilePath (TRUE, FilePath, FileSize, &AuthenticationStatus);
if (FileBuffer != NULL) {
*FullPath = DuplicateDevicePath (FilePath);
}
return FileBuffer;
}
//
// Only wide match other FVs if it's a memory mapped FV file path.
//
if ((DevicePathType (FilePath) != HARDWARE_DEVICE_PATH) || (DevicePathSubType (FilePath) != HW_MEMMAP_DP)) {
return NULL;
}
FvFileNode = NextDevicePathNode (FilePath);
//
// Firstly find the FV file in current FV
//
gBS->HandleProtocol (
gImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **) &LoadedImage
);
NewDevicePath = AppendDevicePathNode (DevicePathFromHandle (LoadedImage->DeviceHandle), FvFileNode);
FileBuffer = BmGetFileBufferByFvFilePath (NewDevicePath, FullPath, FileSize);
FreePool (NewDevicePath);
if (FileBuffer != NULL) {
return FileBuffer;
}
//
// Secondly find the FV file in all other FVs
//
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&FvHandleCount,
&FvHandles
);
for (Index = 0; (Index < FvHandleCount) && (FileBuffer == NULL); Index++) {
if (FvHandles[Index] == LoadedImage->DeviceHandle) {
//
// Skip current FV
//
continue;
}
NewDevicePath = AppendDevicePathNode (DevicePathFromHandle (FvHandles[Index]), FvFileNode);
FileBuffer = BmGetFileBufferByFvFilePath (NewDevicePath, FullPath, FileSize);
FreePool (NewDevicePath);
}
if (FvHandles != NULL) {
FreePool (FvHandles);
}
return FileBuffer;
}
/**
Check if it's a Device Path pointing to FV file.
The function doesn't garentee the device path points to existing FV file.
@param DevicePath Input device path.
@retval TRUE The device path is a FV File Device Path.
@retval FALSE The device path is NOT a FV File Device Path.
**/
BOOLEAN
BmIsFvFilePath (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
EFI_DEVICE_PATH_PROTOCOL *Node;
Node = DevicePath;
Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &Node, &Handle);
if (!EFI_ERROR (Status)) {
return TRUE;
}
if ((DevicePathType (DevicePath) == HARDWARE_DEVICE_PATH) && (DevicePathSubType (DevicePath) == HW_MEMMAP_DP)) {
DevicePath = NextDevicePathNode (DevicePath);
if ((DevicePathType (DevicePath) == MEDIA_DEVICE_PATH) && (DevicePathSubType (DevicePath) == MEDIA_PIWG_FW_FILE_DP)) {
return IsDevicePathEnd (NextDevicePathNode (DevicePath));
}
}
return FALSE;
}
/**
Check whether a USB device match the specified USB Class device path. This
function follows "Load Option Processing" behavior in UEFI specification.
@param UsbIo USB I/O protocol associated with the USB device.
@param UsbClass The USB Class device path to match.
@retval TRUE The USB device match the USB Class device path.
@retval FALSE The USB device does not match the USB Class device path.
**/
BOOLEAN
BmMatchUsbClass (
IN EFI_USB_IO_PROTOCOL *UsbIo,
IN USB_CLASS_DEVICE_PATH *UsbClass
)
{
EFI_STATUS Status;
EFI_USB_DEVICE_DESCRIPTOR DevDesc;
EFI_USB_INTERFACE_DESCRIPTOR IfDesc;
UINT8 DeviceClass;
UINT8 DeviceSubClass;
UINT8 DeviceProtocol;
if ((DevicePathType (UsbClass) != MESSAGING_DEVICE_PATH) ||
(DevicePathSubType (UsbClass) != MSG_USB_CLASS_DP)){
return FALSE;
}
//
// Check Vendor Id and Product Id.
//
Status = UsbIo->UsbGetDeviceDescriptor (UsbIo, &DevDesc);
if (EFI_ERROR (Status)) {
return FALSE;
}
if ((UsbClass->VendorId != 0xffff) &&
(UsbClass->VendorId != DevDesc.IdVendor)) {
return FALSE;
}
if ((UsbClass->ProductId != 0xffff) &&
(UsbClass->ProductId != DevDesc.IdProduct)) {
return FALSE;
}
DeviceClass = DevDesc.DeviceClass;
DeviceSubClass = DevDesc.DeviceSubClass;
DeviceProtocol = DevDesc.DeviceProtocol;
if (DeviceClass == 0) {
//
// If Class in Device Descriptor is set to 0, use the Class, SubClass and
// Protocol in Interface Descriptor instead.
//
Status = UsbIo->UsbGetInterfaceDescriptor (UsbIo, &IfDesc);
if (EFI_ERROR (Status)) {
return FALSE;
}
DeviceClass = IfDesc.InterfaceClass;
DeviceSubClass = IfDesc.InterfaceSubClass;
DeviceProtocol = IfDesc.InterfaceProtocol;
}
//
// Check Class, SubClass and Protocol.
//
if ((UsbClass->DeviceClass != 0xff) &&
(UsbClass->DeviceClass != DeviceClass)) {
return FALSE;
}
if ((UsbClass->DeviceSubClass != 0xff) &&
(UsbClass->DeviceSubClass != DeviceSubClass)) {
return FALSE;
}
if ((UsbClass->DeviceProtocol != 0xff) &&
(UsbClass->DeviceProtocol != DeviceProtocol)) {
return FALSE;
}
return TRUE;
}
/**
Check whether a USB device match the specified USB WWID device path. This
function follows "Load Option Processing" behavior in UEFI specification.
@param UsbIo USB I/O protocol associated with the USB device.
@param UsbWwid The USB WWID device path to match.
@retval TRUE The USB device match the USB WWID device path.
@retval FALSE The USB device does not match the USB WWID device path.
**/
BOOLEAN
BmMatchUsbWwid (
IN EFI_USB_IO_PROTOCOL *UsbIo,
IN USB_WWID_DEVICE_PATH *UsbWwid
)
{
EFI_STATUS Status;
EFI_USB_DEVICE_DESCRIPTOR DevDesc;
EFI_USB_INTERFACE_DESCRIPTOR IfDesc;
UINT16 *LangIdTable;
UINT16 TableSize;
UINT16 Index;
CHAR16 *CompareStr;
UINTN CompareLen;
CHAR16 *SerialNumberStr;
UINTN Length;
if ((DevicePathType (UsbWwid) != MESSAGING_DEVICE_PATH) ||
(DevicePathSubType (UsbWwid) != MSG_USB_WWID_DP)) {
return FALSE;
}
//
// Check Vendor Id and Product Id.
//
Status = UsbIo->UsbGetDeviceDescriptor (UsbIo, &DevDesc);
if (EFI_ERROR (Status)) {
return FALSE;
}
if ((DevDesc.IdVendor != UsbWwid->VendorId) ||
(DevDesc.IdProduct != UsbWwid->ProductId)) {
return FALSE;
}
//
// Check Interface Number.
//
Status = UsbIo->UsbGetInterfaceDescriptor (UsbIo, &IfDesc);
if (EFI_ERROR (Status)) {
return FALSE;
}
if (IfDesc.InterfaceNumber != UsbWwid->InterfaceNumber) {
return FALSE;
}
//
// Check Serial Number.
//
if (DevDesc.StrSerialNumber == 0) {
return FALSE;
}
//
// Get all supported languages.
//
TableSize = 0;
LangIdTable = NULL;
Status = UsbIo->UsbGetSupportedLanguages (UsbIo, &LangIdTable, &TableSize);
if (EFI_ERROR (Status) || (TableSize == 0) || (LangIdTable == NULL)) {
return FALSE;
}
//
// Serial number in USB WWID device path is the last 64-or-less UTF-16 characters.
//
CompareStr = (CHAR16 *) (UINTN) (UsbWwid + 1);
CompareLen = (DevicePathNodeLength (UsbWwid) - sizeof (USB_WWID_DEVICE_PATH)) / sizeof (CHAR16);
if (CompareStr[CompareLen - 1] == L'\0') {
CompareLen--;
}
//
// Compare serial number in each supported language.
//
for (Index = 0; Index < TableSize / sizeof (UINT16); Index++) {
SerialNumberStr = NULL;
Status = UsbIo->UsbGetStringDescriptor (
UsbIo,
LangIdTable[Index],
DevDesc.StrSerialNumber,
&SerialNumberStr
);
if (EFI_ERROR (Status) || (SerialNumberStr == NULL)) {
continue;
}
Length = StrLen (SerialNumberStr);
if ((Length >= CompareLen) &&
(CompareMem (SerialNumberStr + Length - CompareLen, CompareStr, CompareLen * sizeof (CHAR16)) == 0)) {
FreePool (SerialNumberStr);
return TRUE;
}
FreePool (SerialNumberStr);
}
return FALSE;
}
/**
Find a USB device which match the specified short-form device path start with
USB Class or USB WWID device path. If ParentDevicePath is NULL, this function
will search in all USB devices of the platform. If ParentDevicePath is not NULL,
this function will only search in its child devices.
@param DevicePath The device path that contains USB Class or USB WWID device path.
@param ParentDevicePathSize The length of the device path before the USB Class or
USB WWID device path.
@param UsbIoHandleCount A pointer to the count of the returned USB IO handles.
@retval NULL The matched USB IO handles cannot be found.
@retval other The matched USB IO handles.
**/
EFI_HANDLE *
BmFindUsbDevice (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN UINTN ParentDevicePathSize,
OUT UINTN *UsbIoHandleCount
)
{
EFI_STATUS Status;
EFI_HANDLE *UsbIoHandles;
EFI_DEVICE_PATH_PROTOCOL *UsbIoDevicePath;
EFI_USB_IO_PROTOCOL *UsbIo;
UINTN Index;
BOOLEAN Matched;
ASSERT (UsbIoHandleCount != NULL);
//
// Get all UsbIo Handles.
//
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiUsbIoProtocolGuid,
NULL,
UsbIoHandleCount,
&UsbIoHandles
);
if (EFI_ERROR (Status)) {
*UsbIoHandleCount = 0;
UsbIoHandles = NULL;
}
for (Index = 0; Index < *UsbIoHandleCount; ) {
//
// Get the Usb IO interface.
//
Status = gBS->HandleProtocol(
UsbIoHandles[Index],
&gEfiUsbIoProtocolGuid,
(VOID **) &UsbIo
);
UsbIoDevicePath = DevicePathFromHandle (UsbIoHandles[Index]);
Matched = FALSE;
if (!EFI_ERROR (Status) && (UsbIoDevicePath != NULL)) {
//
// Compare starting part of UsbIoHandle's device path with ParentDevicePath.
//
if (CompareMem (UsbIoDevicePath, DevicePath, ParentDevicePathSize) == 0) {
if (BmMatchUsbClass (UsbIo, (USB_CLASS_DEVICE_PATH *) ((UINTN) DevicePath + ParentDevicePathSize)) ||
BmMatchUsbWwid (UsbIo, (USB_WWID_DEVICE_PATH *) ((UINTN) DevicePath + ParentDevicePathSize))) {
Matched = TRUE;
}
}
}
if (!Matched) {
(*UsbIoHandleCount) --;
CopyMem (&UsbIoHandles[Index], &UsbIoHandles[Index + 1], (*UsbIoHandleCount - Index) * sizeof (EFI_HANDLE));
} else {
Index++;
}
}
return UsbIoHandles;
}
/**
Expand USB Class or USB WWID device path node to be full device path of a USB
device in platform.
This function support following 4 cases:
1) Boot Option device path starts with a USB Class or USB WWID device path,
and there is no Media FilePath device path in the end.
In this case, it will follow Removable Media Boot Behavior.
2) Boot Option device path starts with a USB Class or USB WWID device path,
and ended with Media FilePath device path.
3) Boot Option device path starts with a full device path to a USB Host Controller,
contains a USB Class or USB WWID device path node, while not ended with Media
FilePath device path. In this case, it will follow Removable Media Boot Behavior.
4) Boot Option device path starts with a full device path to a USB Host Controller,
contains a USB Class or USB WWID device path node, and ended with Media
FilePath device path.
@param FilePath The device path pointing to a load option.
It could be a short-form device path.
@param FullPath Return the full device path of the load option after
short-form device path expanding.
Caller is responsible to free it.
@param FileSize Return the load option size.
@param ShortformNode Pointer to the USB short-form device path node in the FilePath buffer.
@return The load option buffer. Caller is responsible to free the memory.
**/
VOID *
BmExpandUsbDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize,
IN EFI_DEVICE_PATH_PROTOCOL *ShortformNode
)
{
UINTN ParentDevicePathSize;
EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
EFI_DEVICE_PATH_PROTOCOL *FullDevicePath;
EFI_HANDLE *Handles;
UINTN HandleCount;
UINTN Index;
VOID *FileBuffer;
ParentDevicePathSize = (UINTN) ShortformNode - (UINTN) FilePath;
RemainingDevicePath = NextDevicePathNode (ShortformNode);
FileBuffer = NULL;
Handles = BmFindUsbDevice (FilePath, ParentDevicePathSize, &HandleCount);
for (Index = 0; (Index < HandleCount) && (FileBuffer == NULL); Index++) {
FullDevicePath = AppendDevicePath (DevicePathFromHandle (Handles[Index]), RemainingDevicePath);
FileBuffer = EfiBootManagerGetLoadOptionBuffer (FullDevicePath, FullPath, FileSize);
FreePool (FullDevicePath);
}
if (Handles != NULL) {
FreePool (Handles);
}
return FileBuffer;
}
/**
Expand File-path device path node to be full device path in platform.
@param FilePath The device path pointing to a load option.
It could be a short-form device path.
@param FullPath Return the full device path of the load option after
short-form device path expanding.
Caller is responsible to free it.
@param FileSize Return the load option size.
@return The load option buffer. Caller is responsible to free the memory.
**/
VOID *
BmExpandFileDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
UINTN Index;
UINTN HandleCount;
EFI_HANDLE *Handles;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
UINTN MediaType;
EFI_DEVICE_PATH_PROTOCOL *FullDevicePath;
VOID *FileBuffer;
UINT32 AuthenticationStatus;
EfiBootManagerConnectAll ();
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleFileSystemProtocolGuid, NULL, &HandleCount, &Handles);
if (EFI_ERROR (Status)) {
HandleCount = 0;
Handles = NULL;
}
//
// Enumerate all removable media devices followed by all fixed media devices,
// followed by media devices which don't layer on block io.
//
for (MediaType = 0; MediaType < 3; MediaType++) {
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (Handles[Index], &gEfiBlockIoProtocolGuid, (VOID *) &BlockIo);
if (EFI_ERROR (Status)) {
BlockIo = NULL;
}
if ((MediaType == 0 && BlockIo != NULL && BlockIo->Media->RemovableMedia) ||
(MediaType == 1 && BlockIo != NULL && !BlockIo->Media->RemovableMedia) ||
(MediaType == 2 && BlockIo == NULL)
) {
FullDevicePath = AppendDevicePath (DevicePathFromHandle (Handles[Index]), FilePath);
FileBuffer = GetFileBufferByFilePath (TRUE, FullDevicePath, FileSize, &AuthenticationStatus);
if (FileBuffer != NULL) {
*FullPath = FullDevicePath;
FreePool (Handles);
return FileBuffer;
}
FreePool (FullDevicePath);
}
}
}
if (Handles != NULL) {
FreePool (Handles);
}
*FullPath = NULL;
return NULL;
}
/**
Expand URI device path node to be full device path in platform.
@param FilePath The device path pointing to a load option.
It could be a short-form device path.
@param FullPath Return the full device path of the load option after
short-form device path expanding.
Caller is responsible to free it.
@param FileSize Return the load option size.
@return The load option buffer. Caller is responsible to free the memory.
**/
VOID *
BmExpandUriDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
UINTN Index;
UINTN HandleCount;
EFI_HANDLE *Handles;
VOID *FileBuffer;
EfiBootManagerConnectAll ();
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiLoadFileProtocolGuid, NULL, &HandleCount, &Handles);
if (EFI_ERROR (Status)) {
HandleCount = 0;
Handles = NULL;
}
FileBuffer = NULL;
for (Index = 0; Index < HandleCount; Index++) {
FileBuffer = BmGetFileBufferFromLoadFile (Handles[Index], FilePath, FullPath, FileSize);
if (FileBuffer != NULL) {
break;
}
}
if (Handles != NULL) {
FreePool (Handles);
}
return FileBuffer;
}
/**
Save the partition DevicePath to the CachedDevicePath as the first instance.
@param CachedDevicePath The device path cache.
@param DevicePath The partition device path to be cached.
**/
VOID
BmCachePartitionDevicePath (
IN OUT EFI_DEVICE_PATH_PROTOCOL **CachedDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;
UINTN Count;
if (BmMatchDevicePaths (*CachedDevicePath, DevicePath)) {
TempDevicePath = *CachedDevicePath;
*CachedDevicePath = BmDelPartMatchInstance (*CachedDevicePath, DevicePath);
FreePool (TempDevicePath);
}
if (*CachedDevicePath == NULL) {
*CachedDevicePath = DuplicateDevicePath (DevicePath);
return;
}
TempDevicePath = *CachedDevicePath;
*CachedDevicePath = AppendDevicePathInstance (DevicePath, *CachedDevicePath);
if (TempDevicePath != NULL) {
FreePool (TempDevicePath);
}
//
// Here limit the device path instance number to 12, which is max number for a system support 3 IDE controller
// If the user try to boot many OS in different HDs or partitions, in theory, the 'HDDP' variable maybe become larger and larger.
//
Count = 0;
TempDevicePath = *CachedDevicePath;
while (!IsDevicePathEnd (TempDevicePath)) {
TempDevicePath = NextDevicePathNode (TempDevicePath);
//
// Parse one instance
//
while (!IsDevicePathEndType (TempDevicePath)) {
TempDevicePath = NextDevicePathNode (TempDevicePath);
}
Count++;
//
// If the CachedDevicePath variable contain too much instance, only remain 12 instances.
//
if (Count == 12) {
SetDevicePathEndNode (TempDevicePath);
break;
}
}
}
/**
Expand a device path that starts with a hard drive media device path node to be a
full device path that includes the full hardware path to the device. We need
to do this so it can be booted. As an optimization the front match (the part point
to the partition node. E.g. ACPI() /PCI()/ATA()/Partition() ) is saved in a variable
so a connect all is not required on every boot. All successful history device path
which point to partition node (the front part) will be saved.
@param FilePath The device path pointing to a load option.
It could be a short-form device path.
@param FullPath Return the full device path of the load option after
short-form device path expanding.
Caller is responsible to free it.
@param FileSize Return the load option size.
@return The load option buffer. Caller is responsible to free the memory.
**/
VOID *
BmExpandPartitionDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
UINTN BlockIoHandleCount;
EFI_HANDLE *BlockIoBuffer;
VOID *FileBuffer;
EFI_DEVICE_PATH_PROTOCOL *BlockIoDevicePath;
UINTN Index;
EFI_DEVICE_PATH_PROTOCOL *CachedDevicePath;
EFI_DEVICE_PATH_PROTOCOL *TempNewDevicePath;
EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;
UINTN CachedDevicePathSize;
BOOLEAN NeedAdjust;
EFI_DEVICE_PATH_PROTOCOL *Instance;
UINTN Size;
FileBuffer = NULL;
//
// Check if there is prestore 'HDDP' variable.
// If exist, search the front path which point to partition node in the variable instants.
// If fail to find or 'HDDP' not exist, reconnect all and search in all system
//
GetVariable2 (L"HDDP", &mBmHardDriveBootVariableGuid, (VOID **) &CachedDevicePath, &CachedDevicePathSize);
//
// Delete the invalid 'HDDP' variable.
//
if ((CachedDevicePath != NULL) && !IsDevicePathValid (CachedDevicePath, CachedDevicePathSize)) {
FreePool (CachedDevicePath);
CachedDevicePath = NULL;
Status = gRT->SetVariable (
L"HDDP",
&mBmHardDriveBootVariableGuid,
0,
0,
NULL
);
ASSERT_EFI_ERROR (Status);
}
if (CachedDevicePath != NULL) {
TempNewDevicePath = CachedDevicePath;
NeedAdjust = FALSE;
do {
//
// Check every instance of the variable
// First, check whether the instance contain the partition node, which is needed for distinguishing multi
// partial partition boot option. Second, check whether the instance could be connected.
//
Instance = GetNextDevicePathInstance (&TempNewDevicePath, &Size);
if (BmMatchPartitionDevicePathNode (Instance, (HARDDRIVE_DEVICE_PATH *) FilePath)) {
//
// Connect the device path instance, the device path point to hard drive media device path node
// e.g. ACPI() /PCI()/ATA()/Partition()
//
Status = EfiBootManagerConnectDevicePath (Instance, NULL);
if (!EFI_ERROR (Status)) {
TempDevicePath = AppendDevicePath (Instance, NextDevicePathNode (FilePath));
FileBuffer = EfiBootManagerGetLoadOptionBuffer (TempDevicePath, FullPath, FileSize);
FreePool (TempDevicePath);
if (FileBuffer != NULL) {
//
// Adjust the 'HDDP' instances sequence if the matched one is not first one.
//
if (NeedAdjust) {
BmCachePartitionDevicePath (&CachedDevicePath, Instance);
//
// Save the matching Device Path so we don't need to do a connect all next time
// Failing to save only impacts performance next time expanding the short-form device path
//
Status = gRT->SetVariable (
L"HDDP",
&mBmHardDriveBootVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
GetDevicePathSize (CachedDevicePath),
CachedDevicePath
);
}
FreePool (Instance);
FreePool (CachedDevicePath);
return FileBuffer;
}
}
}
//
// Come here means the first instance is not matched
//
NeedAdjust = TRUE;
FreePool(Instance);
} while (TempNewDevicePath != NULL);
}
//
// If we get here we fail to find or 'HDDP' not exist, and now we need
// to search all devices in the system for a matched partition
//
EfiBootManagerConnectAll ();
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &BlockIoHandleCount, &BlockIoBuffer);
if (EFI_ERROR (Status)) {
BlockIoHandleCount = 0;
BlockIoBuffer = NULL;
}
//
// Loop through all the device handles that support the BLOCK_IO Protocol
//
for (Index = 0; Index < BlockIoHandleCount; Index++) {
BlockIoDevicePath = DevicePathFromHandle (BlockIoBuffer[Index]);
if (BlockIoDevicePath == NULL) {
continue;
}
if (BmMatchPartitionDevicePathNode (BlockIoDevicePath, (HARDDRIVE_DEVICE_PATH *) FilePath)) {
//
// Find the matched partition device path
//
TempDevicePath = AppendDevicePath (BlockIoDevicePath, NextDevicePathNode (FilePath));
FileBuffer = EfiBootManagerGetLoadOptionBuffer (TempDevicePath, FullPath, FileSize);
FreePool (TempDevicePath);
if (FileBuffer != NULL) {
BmCachePartitionDevicePath (&CachedDevicePath, BlockIoDevicePath);
//
// Save the matching Device Path so we don't need to do a connect all next time
// Failing to save only impacts performance next time expanding the short-form device path
//
Status = gRT->SetVariable (
L"HDDP",
&mBmHardDriveBootVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
GetDevicePathSize (CachedDevicePath),
CachedDevicePath
);
break;
}
}
}
if (CachedDevicePath != NULL) {
FreePool (CachedDevicePath);
}
if (BlockIoBuffer != NULL) {
FreePool (BlockIoBuffer);
}
return FileBuffer;
}
/**
Expand the media device path which points to a BlockIo or SimpleFileSystem instance
by appending EFI_REMOVABLE_MEDIA_FILE_NAME.
@param DevicePath The media device path pointing to a BlockIo or SimpleFileSystem instance.
@param FullPath Return the full device path pointing to the load option.
@param FileSize Return the size of the load option.
@return The load option buffer.
**/
VOID *
BmExpandMediaDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
VOID *Buffer;
EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;
UINTN Size;
UINTN TempSize;
EFI_HANDLE *SimpleFileSystemHandles;
UINTN NumberSimpleFileSystemHandles;
UINTN Index;
VOID *FileBuffer;
UINT32 AuthenticationStatus;
//
// Check whether the device is connected
//
TempDevicePath = DevicePath;
Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid, &TempDevicePath, &Handle);
if (!EFI_ERROR (Status)) {
ASSERT (IsDevicePathEnd (TempDevicePath));
TempDevicePath = FileDevicePath (Handle, EFI_REMOVABLE_MEDIA_FILE_NAME);
FileBuffer = GetFileBufferByFilePath (TRUE, TempDevicePath, FileSize, &AuthenticationStatus);
if (FileBuffer == NULL) {
FreePool (TempDevicePath);
TempDevicePath = NULL;
}
*FullPath = TempDevicePath;
return FileBuffer;
}
//
// For device boot option only pointing to the removable device handle,
// should make sure all its children handles (its child partion or media handles) are created and connected.
//
gBS->ConnectController (Handle, NULL, NULL, TRUE);
//
// Issue a dummy read to the device to check for media change.
// When the removable media is changed, any Block IO read/write will
// cause the BlockIo protocol be reinstalled and EFI_MEDIA_CHANGED is
// returned. After the Block IO protocol is reinstalled, subsequent
// Block IO read/write will success.
//
Status = gBS->LocateDevicePath (&gEfiBlockIoProtocolGuid, &TempDevicePath, &Handle);
ASSERT_EFI_ERROR (Status);
Status = gBS->HandleProtocol (Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);
ASSERT_EFI_ERROR (Status);
Buffer = AllocatePool (BlockIo->Media->BlockSize);
if (Buffer != NULL) {
BlockIo->ReadBlocks (
BlockIo,
BlockIo->Media->MediaId,
0,
BlockIo->Media->BlockSize,
Buffer
);
FreePool (Buffer);
}
//
// Detect the the default boot file from removable Media
//
FileBuffer = NULL;
*FullPath = NULL;
Size = GetDevicePathSize (DevicePath) - END_DEVICE_PATH_LENGTH;
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiSimpleFileSystemProtocolGuid,
NULL,
&NumberSimpleFileSystemHandles,
&SimpleFileSystemHandles
);
for (Index = 0; Index < NumberSimpleFileSystemHandles; Index++) {
//
// Get the device path size of SimpleFileSystem handle
//
TempDevicePath = DevicePathFromHandle (SimpleFileSystemHandles[Index]);
TempSize = GetDevicePathSize (TempDevicePath) - END_DEVICE_PATH_LENGTH;
//
// Check whether the device path of boot option is part of the SimpleFileSystem handle's device path
//
if ((Size <= TempSize) && (CompareMem (TempDevicePath, DevicePath, Size) == 0)) {
TempDevicePath = FileDevicePath (SimpleFileSystemHandles[Index], EFI_REMOVABLE_MEDIA_FILE_NAME);
FileBuffer = GetFileBufferByFilePath (TRUE, TempDevicePath, FileSize, &AuthenticationStatus);
if (FileBuffer != NULL) {
*FullPath = TempDevicePath;
break;
}
FreePool (TempDevicePath);
}
}
if (SimpleFileSystemHandles != NULL) {
FreePool (SimpleFileSystemHandles);
}
return FileBuffer;
}
/**
Check whether Left and Right are the same without matching the specific
device path data in IP device path and URI device path node.
@retval TRUE Left and Right are the same.
@retval FALSE Left and Right are the different.
**/
BOOLEAN
BmMatchHttpBootDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *Left,
IN EFI_DEVICE_PATH_PROTOCOL *Right
)
{
for (; !IsDevicePathEnd (Left) && !IsDevicePathEnd (Right)
; Left = NextDevicePathNode (Left), Right = NextDevicePathNode (Right)
) {
if (CompareMem (Left, Right, DevicePathNodeLength (Left)) != 0) {
if ((DevicePathType (Left) != MESSAGING_DEVICE_PATH) || (DevicePathType (Right) != MESSAGING_DEVICE_PATH)) {
return FALSE;
}
if (((DevicePathSubType (Left) != MSG_IPv4_DP) || (DevicePathSubType (Right) != MSG_IPv4_DP)) &&
((DevicePathSubType (Left) != MSG_IPv6_DP) || (DevicePathSubType (Right) != MSG_IPv6_DP)) &&
((DevicePathSubType (Left) != MSG_URI_DP) || (DevicePathSubType (Right) != MSG_URI_DP))
) {
return FALSE;
}
}
}
return (BOOLEAN) (IsDevicePathEnd (Left) && IsDevicePathEnd (Right));
}
/**
Get the file buffer from the file system produced by Load File instance.
@param LoadFileHandle The handle of LoadFile instance.
@param FullPath Return the full device path pointing to the load option.
@param FileSize Return the size of the load option.
@param RamDiskHandle Return the RAM Disk handle.
@return The load option buffer.
**/
VOID *
BmGetFileBufferFromLoadFileSystem (
IN EFI_HANDLE LoadFileHandle,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize,
OUT EFI_HANDLE *RamDiskHandle
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
EFI_HANDLE *Handles;
UINTN HandleCount;
UINTN Index;
EFI_DEVICE_PATH_PROTOCOL *Node;
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiBlockIoProtocolGuid,
NULL,
&HandleCount,
&Handles
);
if (EFI_ERROR (Status)) {
Handles = NULL;
HandleCount = 0;
}
Handle = NULL;
for (Index = 0; Index < HandleCount; Index++) {
Node = DevicePathFromHandle (Handles[Index]);
Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
if (!EFI_ERROR (Status) &&
(Handle == LoadFileHandle) &&
(DevicePathType (Node) == MEDIA_DEVICE_PATH) && (DevicePathSubType (Node) == MEDIA_RAM_DISK_DP)) {
Handle = Handles[Index];
break;
}
}
if (Handles != NULL) {
FreePool (Handles);
}
if (Index == HandleCount) {
Handle = NULL;
}
*RamDiskHandle = Handle;
if (Handle != NULL) {
return BmExpandMediaDevicePath (DevicePathFromHandle (Handle), FullPath, FileSize);
} else {
return NULL;
}
}
/**
Return the RAM Disk device path created by LoadFile.
@param FilePath The source file path.
@return Callee-to-free RAM Disk device path
**/
EFI_DEVICE_PATH_PROTOCOL *
BmGetRamDiskDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath
)
{
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath;
EFI_DEVICE_PATH_PROTOCOL *Node;
EFI_HANDLE Handle;
Node = FilePath;
Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
if (!EFI_ERROR (Status) &&
(DevicePathType (Node) == MEDIA_DEVICE_PATH) &&
(DevicePathSubType (Node) == MEDIA_RAM_DISK_DP)
) {
//
// Construct the device path pointing to RAM Disk
//
Node = NextDevicePathNode (Node);
RamDiskDevicePath = DuplicateDevicePath (FilePath);
ASSERT (RamDiskDevicePath != NULL);
SetDevicePathEndNode ((VOID *) ((UINTN) RamDiskDevicePath + ((UINTN) Node - (UINTN) FilePath)));
return RamDiskDevicePath;
}
return NULL;
}
/**
Return the buffer and buffer size occupied by the RAM Disk.
@param RamDiskDevicePath RAM Disk device path.
@param RamDiskSizeInPages Return RAM Disk size in pages.
@retval RAM Disk buffer.
**/
VOID *
BmGetRamDiskMemoryInfo (
IN EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath,
OUT UINTN *RamDiskSizeInPages
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
UINT64 StartingAddr;
UINT64 EndingAddr;
ASSERT (RamDiskDevicePath != NULL);
*RamDiskSizeInPages = 0;
//
// Get the buffer occupied by RAM Disk.
//
Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &RamDiskDevicePath, &Handle);
ASSERT_EFI_ERROR (Status);
ASSERT ((DevicePathType (RamDiskDevicePath) == MEDIA_DEVICE_PATH) &&
(DevicePathSubType (RamDiskDevicePath) == MEDIA_RAM_DISK_DP));
StartingAddr = ReadUnaligned64 ((UINT64 *) ((MEDIA_RAM_DISK_DEVICE_PATH *) RamDiskDevicePath)->StartingAddr);
EndingAddr = ReadUnaligned64 ((UINT64 *) ((MEDIA_RAM_DISK_DEVICE_PATH *) RamDiskDevicePath)->EndingAddr);
*RamDiskSizeInPages = EFI_SIZE_TO_PAGES ((UINTN) (EndingAddr - StartingAddr + 1));
return (VOID *) (UINTN) StartingAddr;
}
/**
Destroy the RAM Disk.
The destroy operation includes to call RamDisk.Unregister to
unregister the RAM DISK from RAM DISK driver, free the memory
allocated for the RAM Disk.
@param RamDiskDevicePath RAM Disk device path.
**/
VOID
BmDestroyRamDisk (
IN EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath
)
{
EFI_STATUS Status;
VOID *RamDiskBuffer;
UINTN RamDiskSizeInPages;
ASSERT (RamDiskDevicePath != NULL);
RamDiskBuffer = BmGetRamDiskMemoryInfo (RamDiskDevicePath, &RamDiskSizeInPages);
//
// Destroy RAM Disk.
//
if (mRamDisk == NULL) {
Status = gBS->LocateProtocol (&gEfiRamDiskProtocolGuid, NULL, (VOID *) &mRamDisk);
ASSERT_EFI_ERROR (Status);
}
Status = mRamDisk->Unregister (RamDiskDevicePath);
ASSERT_EFI_ERROR (Status);
FreePages (RamDiskBuffer, RamDiskSizeInPages);
}
/**
Get the file buffer from the specified Load File instance.
@param LoadFileHandle The specified Load File instance.
@param FilePath The file path which will pass to LoadFile().
@param FullPath Return the full device path pointing to the load option.
@param FileSize Return the size of the load option.
@return The load option buffer or NULL if fails.
**/
VOID *
BmGetFileBufferFromLoadFile (
IN EFI_HANDLE LoadFileHandle,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
EFI_LOAD_FILE_PROTOCOL *LoadFile;
VOID *FileBuffer;
BOOLEAN LoadFileSystem;
EFI_HANDLE RamDiskHandle;
UINTN BufferSize;
*FileSize = 0;
Status = gBS->OpenProtocol (
LoadFileHandle,
&gEfiLoadFileProtocolGuid,
(VOID **) &LoadFile,
gImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
ASSERT_EFI_ERROR (Status);
FileBuffer = NULL;
BufferSize = 0;
Status = LoadFile->LoadFile (LoadFile, FilePath, TRUE, &BufferSize, FileBuffer);
if ((Status != EFI_WARN_FILE_SYSTEM) && (Status != EFI_BUFFER_TOO_SMALL)) {
return NULL;
}
LoadFileSystem = (BOOLEAN) (Status == EFI_WARN_FILE_SYSTEM);
FileBuffer = LoadFileSystem ? AllocateReservedPages (EFI_SIZE_TO_PAGES (BufferSize)) : AllocatePool (BufferSize);
if (FileBuffer == NULL) {
return NULL;
}
Status = LoadFile->LoadFile (LoadFile, FilePath, TRUE, &BufferSize, FileBuffer);
if (EFI_ERROR (Status)) {
if (LoadFileSystem) {
FreePages (FileBuffer, EFI_SIZE_TO_PAGES (BufferSize));
} else {
FreePool (FileBuffer);
}
return NULL;
}
if (LoadFileSystem) {
FileBuffer = BmGetFileBufferFromLoadFileSystem (LoadFileHandle, FullPath, FileSize, &RamDiskHandle);
if (FileBuffer == NULL) {
//
// If there is no bootable executable in the populated
//
BmDestroyRamDisk (DevicePathFromHandle (RamDiskHandle));
}
} else {
*FileSize = BufferSize;
*FullPath = DuplicateDevicePath (DevicePathFromHandle (LoadFileHandle));
}
return FileBuffer;
}
/**
Get the file buffer from all the Load File instances.
@param FilePath The media device path pointing to a LoadFile instance.
@param FullPath Return the full device path pointing to the load option.
@param FileSize Return the size of the load option.
@return The load option buffer.
**/
VOID *
BmGetFileBufferFromLoadFiles (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
EFI_HANDLE *Handles;
UINTN HandleCount;
UINTN Index;
EFI_DEVICE_PATH_PROTOCOL *Node;
//
// Get file buffer from load file instance.
//
Node = FilePath;
Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
if (!EFI_ERROR (Status) && IsDevicePathEnd (Node)) {
//
// When wide match happens, pass full device path to LoadFile (),
// otherwise, pass remaining device path to LoadFile ().
//
FilePath = Node;
} else {
Handle = NULL;
//
// Use wide match algorithm to find one when
// cannot find a LoadFile instance to exactly match the FilePath
//
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiLoadFileProtocolGuid,
NULL,
&HandleCount,
&Handles
);
if (EFI_ERROR (Status)) {
Handles = NULL;
HandleCount = 0;
}
for (Index = 0; Index < HandleCount; Index++) {
if (BmMatchHttpBootDevicePath (DevicePathFromHandle (Handles[Index]), FilePath)) {
Handle = Handles[Index];
break;
}
}
if (Handles != NULL) {
FreePool (Handles);
}
}
if (Handle == NULL) {
return NULL;
}
return BmGetFileBufferFromLoadFile (Handle, FilePath, FullPath, FileSize);
}
/**
Get the load option by its device path.
@param FilePath The device path pointing to a load option.
It could be a short-form device path.
@param FullPath Return the full device path of the load option after
short-form device path expanding.
Caller is responsible to free it.
@param FileSize Return the load option size.
@return The load option buffer. Caller is responsible to free the memory.
**/
VOID *
EFIAPI
EfiBootManagerGetLoadOptionBuffer (
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT EFI_DEVICE_PATH_PROTOCOL **FullPath,
OUT UINTN *FileSize
)
{
EFI_HANDLE Handle;
VOID *FileBuffer;
UINT32 AuthenticationStatus;
EFI_DEVICE_PATH_PROTOCOL *Node;
EFI_STATUS Status;
ASSERT ((FilePath != NULL) && (FullPath != NULL) && (FileSize != NULL));
EfiBootManagerConnectDevicePath (FilePath, NULL);
*FullPath = NULL;
*FileSize = 0;
FileBuffer = NULL;
//
// Boot from media device by adding a default file name \EFI\BOOT\BOOT{machine type short-name}.EFI
//
Node = FilePath;
Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid, &Node, &Handle);
if (EFI_ERROR (Status)) {
Status = gBS->LocateDevicePath (&gEfiBlockIoProtocolGuid, &Node, &Handle);
}
if (!EFI_ERROR (Status) && IsDevicePathEnd (Node)) {
return BmExpandMediaDevicePath (FilePath, FullPath, FileSize);
}
//
// Expand the short-form device path to full device path
//
if ((DevicePathType (FilePath) == MEDIA_DEVICE_PATH) &&
(DevicePathSubType (FilePath) == MEDIA_HARDDRIVE_DP)) {
//
// Expand the Harddrive device path
//
return BmExpandPartitionDevicePath (FilePath, FullPath, FileSize);
} else if ((DevicePathType (FilePath) == MEDIA_DEVICE_PATH) &&
(DevicePathSubType (FilePath) == MEDIA_FILEPATH_DP)) {
//
// Expand the File-path device path
//
return BmExpandFileDevicePath (FilePath, FullPath, FileSize);
} else if ((DevicePathType (FilePath) == MESSAGING_DEVICE_PATH) &&
(DevicePathSubType (FilePath) == MSG_URI_DP)) {
//
// Expand the URI device path
//
return BmExpandUriDevicePath (FilePath, FullPath, FileSize);
} else {
for (Node = FilePath; !IsDevicePathEnd (Node); Node = NextDevicePathNode (Node)) {
if ((DevicePathType (Node) == MESSAGING_DEVICE_PATH) &&
((DevicePathSubType (Node) == MSG_USB_CLASS_DP) || (DevicePathSubType (Node) == MSG_USB_WWID_DP))) {
break;
}
}
if (!IsDevicePathEnd (Node)) {
//
// Expand the USB WWID/Class device path
//
FileBuffer = BmExpandUsbDevicePath (FilePath, FullPath, FileSize, Node);
if ((FileBuffer == NULL) && (FilePath == Node)) {
//
// Boot Option device path starts with USB Class or USB WWID device path.
// For Boot Option device path which doesn't begin with the USB Class or
// USB WWID device path, it's not needed to connect again here.
//
BmConnectUsbShortFormDevicePath (FilePath);
FileBuffer = BmExpandUsbDevicePath (FilePath, FullPath, FileSize, Node);
}
return FileBuffer;
}
}
//
// Get file buffer from FV file path.
//
if (BmIsFvFilePath (FilePath)) {
return BmGetFileBufferByFvFilePath (FilePath, FullPath, FileSize);
}
//
// Get file buffer from simple file system.
//
Node = FilePath;
Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid, &Node, &Handle);
if (!EFI_ERROR (Status)) {
FileBuffer = GetFileBufferByFilePath (TRUE, FilePath, FileSize, &AuthenticationStatus);
if (FileBuffer != NULL) {
*FullPath = DuplicateDevicePath (FilePath);
}
return FileBuffer;
}
return BmGetFileBufferFromLoadFiles (FilePath, FullPath, FileSize);
}
/**
Attempt to boot the EFI boot option. This routine sets L"BootCurent" and
also signals the EFI ready to boot event. If the device path for the option
starts with a BBS device path a legacy boot is attempted via the registered
gLegacyBoot function. Short form device paths are also supported via this
rountine. A device path starting with MEDIA_HARDDRIVE_DP, MSG_USB_WWID_DP,
MSG_USB_CLASS_DP gets expaned out to find the first device that matches.
If the BootOption Device Path fails the removable media boot algorithm
is attempted (\EFI\BOOTIA32.EFI, \EFI\BOOTX64.EFI,... only one file type
is tried per processor type)
@param BootOption Boot Option to try and boot.
On return, BootOption->Status contains the boot status.
EFI_SUCCESS BootOption was booted
EFI_UNSUPPORTED A BBS device path was found with no valid callback
registered via EfiBootManagerInitialize().
EFI_NOT_FOUND The BootOption was not found on the system
!EFI_SUCCESS BootOption failed with this error status
**/
VOID
EFIAPI
EfiBootManagerBoot (
IN EFI_BOOT_MANAGER_LOAD_OPTION *BootOption
)
{
EFI_STATUS Status;
EFI_HANDLE ImageHandle;
EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;
UINT16 Uint16;
UINTN OptionNumber;
UINTN OriginalOptionNumber;
EFI_DEVICE_PATH_PROTOCOL *FilePath;
EFI_DEVICE_PATH_PROTOCOL *Node;
EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath;
EFI_HANDLE FvHandle;
VOID *FileBuffer;
UINTN FileSize;
EFI_BOOT_LOGO_PROTOCOL *BootLogo;
EFI_EVENT LegacyBootEvent;
UINTN RamDiskSizeInPages;
if (BootOption == NULL) {
return;
}
if (BootOption->FilePath == NULL || BootOption->OptionType != LoadOptionTypeBoot) {
BootOption->Status = EFI_INVALID_PARAMETER;
return;
}
//
// 1. Create Boot#### for a temporary boot if there is no match Boot#### (i.e. a boot by selected a EFI Shell using "Boot From File")
//
OptionNumber = BmFindBootOptionInVariable (BootOption);
if (OptionNumber == LoadOptionNumberUnassigned) {
Status = BmGetFreeOptionNumber (LoadOptionTypeBoot, &Uint16);
if (!EFI_ERROR (Status)) {
//
// Save the BootOption->OptionNumber to restore later
//
OptionNumber = Uint16;
OriginalOptionNumber = BootOption->OptionNumber;
BootOption->OptionNumber = OptionNumber;
Status = EfiBootManagerLoadOptionToVariable (BootOption);
BootOption->OptionNumber = OriginalOptionNumber;
}
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[Bds] Failed to create Boot#### for a temporary boot - %r!\n", Status));
BootOption->Status = Status;
return ;
}
}
//
// 2. Set BootCurrent
//
Uint16 = (UINT16) OptionNumber;
BmSetVariableAndReportStatusCodeOnError (
L"BootCurrent",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof (UINT16),
&Uint16
);
//
// 3. Signal the EVT_SIGNAL_READY_TO_BOOT event when we are about to load and execute
// the boot option.
//
Node = BootOption->FilePath;
Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &Node, &FvHandle);
if (!EFI_ERROR (Status) && CompareGuid (
EfiGetNameGuidFromFwVolDevicePathNode ((CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) Node),
PcdGetPtr (PcdBootManagerMenuFile)
)) {
DEBUG ((EFI_D_INFO, "[Bds] Booting Boot Manager Menu.\n"));
BmStopHotkeyService (NULL, NULL);
} else {
EfiSignalEventReadyToBoot();
//
// Report Status Code to indicate ReadyToBoot was signalled
//
REPORT_STATUS_CODE (EFI_PROGRESS_CODE, (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_PC_READY_TO_BOOT_EVENT));
//
// 4. Repair system through DriverHealth protocol
//
BmRepairAllControllers ();
}
PERF_START_EX (gImageHandle, "BdsAttempt", NULL, 0, (UINT32) OptionNumber);
//
// 5. Load EFI boot option to ImageHandle
//
ImageHandle = NULL;
RamDiskDevicePath = NULL;
if (DevicePathType (BootOption->FilePath) != BBS_DEVICE_PATH) {
Status = EFI_NOT_FOUND;
FileBuffer = EfiBootManagerGetLoadOptionBuffer (BootOption->FilePath, &FilePath, &FileSize);
if (FileBuffer != NULL) {
RamDiskDevicePath = BmGetRamDiskDevicePath (FilePath);
}
DEBUG_CODE (
if (FileBuffer != NULL && CompareMem (BootOption->FilePath, FilePath, GetDevicePathSize (FilePath)) != 0) {
DEBUG ((EFI_D_INFO, "[Bds] DevicePath expand: "));
BmPrintDp (BootOption->FilePath);
DEBUG ((EFI_D_INFO, " -> "));
BmPrintDp (FilePath);
DEBUG ((EFI_D_INFO, "\n"));
}
);
if (BmIsLoadOptionPeHeaderValid (BootOption->OptionType, FileBuffer, FileSize)) {
REPORT_STATUS_CODE (EFI_PROGRESS_CODE, PcdGet32 (PcdProgressCodeOsLoaderLoad));
Status = gBS->LoadImage (
TRUE,
gImageHandle,
FilePath,
FileBuffer,
FileSize,
&ImageHandle
);
}
if (FileBuffer != NULL) {
FreePool (FileBuffer);
}
if (FilePath != NULL) {
FreePool (FilePath);
}
if (EFI_ERROR (Status)) {
//
// Report Status Code to indicate that the failure to load boot option
//
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_EC_BOOT_OPTION_LOAD_ERROR)
);
BootOption->Status = Status;
//
// Destroy the RAM disk
//
if (RamDiskDevicePath != NULL) {
BmDestroyRamDisk (RamDiskDevicePath);
FreePool (RamDiskDevicePath);
}
return;
}
}
//
// 6. Adjust the different type memory page number just before booting
// and save the updated info into the variable for next boot to use
//
if (RamDiskDevicePath == NULL) {
RamDiskSizeInPages = 0;
} else {
BmGetRamDiskMemoryInfo (RamDiskDevicePath, &RamDiskSizeInPages);
}
BmSetMemoryTypeInformationVariable (
(BOOLEAN) ((BootOption->Attributes & LOAD_OPTION_CATEGORY) == LOAD_OPTION_CATEGORY_BOOT),
RamDiskSizeInPages
);
DEBUG_CODE_BEGIN();
if (BootOption->Description == NULL) {
DEBUG ((DEBUG_INFO | DEBUG_LOAD, "[Bds]Booting from unknown device path\n"));
} else {
DEBUG ((DEBUG_INFO | DEBUG_LOAD, "[Bds]Booting %s\n", BootOption->Description));
}
DEBUG_CODE_END();
//
// Check to see if we should legacy BOOT. If yes then do the legacy boot
// Write boot to OS performance data for Legacy boot
//
if ((DevicePathType (BootOption->FilePath) == BBS_DEVICE_PATH) && (DevicePathSubType (BootOption->FilePath) == BBS_BBS_DP)) {
if (mBmLegacyBoot != NULL) {
//
// Write boot to OS performance data for legacy boot.
//
PERF_CODE (
//
// Create an event to be signalled when Legacy Boot occurs to write performance data.
//
Status = EfiCreateEventLegacyBootEx(
TPL_NOTIFY,
BmWriteBootToOsPerformanceData,
NULL,
&LegacyBootEvent
);
ASSERT_EFI_ERROR (Status);
);
mBmLegacyBoot (BootOption);
} else {
BootOption->Status = EFI_UNSUPPORTED;
}
PERF_END_EX (gImageHandle, "BdsAttempt", NULL, 0, (UINT32) OptionNumber);
return;
}
//
// Provide the image with its load options
//
Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &ImageInfo);
ASSERT_EFI_ERROR (Status);
if (!BmIsAutoCreateBootOption (BootOption)) {
ImageInfo->LoadOptionsSize = BootOption->OptionalDataSize;
ImageInfo->LoadOptions = BootOption->OptionalData;
}
//
// Clean to NULL because the image is loaded directly from the firmwares boot manager.
//
ImageInfo->ParentHandle = NULL;
//
// Before calling the image, enable the Watchdog Timer for 5 minutes period
//
gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);
//
// Write boot to OS performance data for UEFI boot
//
PERF_CODE (
BmWriteBootToOsPerformanceData (NULL, NULL);
);
REPORT_STATUS_CODE (EFI_PROGRESS_CODE, PcdGet32 (PcdProgressCodeOsLoaderStart));
Status = gBS->StartImage (ImageHandle, &BootOption->ExitDataSize, &BootOption->ExitData);
DEBUG ((DEBUG_INFO | DEBUG_LOAD, "Image Return Status = %r\n", Status));
BootOption->Status = Status;
if (EFI_ERROR (Status)) {
//
// Report Status Code to indicate that boot failure
//
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_EC_BOOT_OPTION_FAILED)
);
}
PERF_END_EX (gImageHandle, "BdsAttempt", NULL, 0, (UINT32) OptionNumber);
//
// Destroy the RAM disk
//
if (RamDiskDevicePath != NULL) {
BmDestroyRamDisk (RamDiskDevicePath);
FreePool (RamDiskDevicePath);
}
//
// Clear the Watchdog Timer after the image returns
//
gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);
//
// Set Logo status invalid after trying one boot option
//
BootLogo = NULL;
Status = gBS->LocateProtocol (&gEfiBootLogoProtocolGuid, NULL, (VOID **) &BootLogo);
if (!EFI_ERROR (Status) && (BootLogo != NULL)) {
Status = BootLogo->SetBootLogo (BootLogo, NULL, 0, 0, 0, 0);
ASSERT_EFI_ERROR (Status);
}
//
// Clear Boot Current
//
Status = gRT->SetVariable (
L"BootCurrent",
&gEfiGlobalVariableGuid,
0,
0,
NULL
);
//
// Deleting variable with current variable implementation shouldn't fail.
// When BootXXXX (e.g.: BootManagerMenu) boots BootYYYY, exiting BootYYYY causes BootCurrent deleted,
// exiting BootXXXX causes deleting BootCurrent returns EFI_NOT_FOUND.
//
ASSERT (Status == EFI_SUCCESS || Status == EFI_NOT_FOUND);
}
/**
Check whether there is a instance in BlockIoDevicePath, which contain multi device path
instances, has the same partition node with HardDriveDevicePath device path
@param BlockIoDevicePath Multi device path instances which need to check
@param HardDriveDevicePath A device path which starts with a hard drive media
device path.
@retval TRUE There is a matched device path instance.
@retval FALSE There is no matched device path instance.
**/
BOOLEAN
BmMatchPartitionDevicePathNode (
IN EFI_DEVICE_PATH_PROTOCOL *BlockIoDevicePath,
IN HARDDRIVE_DEVICE_PATH *HardDriveDevicePath
)
{
HARDDRIVE_DEVICE_PATH *Node;
if ((BlockIoDevicePath == NULL) || (HardDriveDevicePath == NULL)) {
return FALSE;
}
//
// find the partition device path node
//
while (!IsDevicePathEnd (BlockIoDevicePath)) {
if ((DevicePathType (BlockIoDevicePath) == MEDIA_DEVICE_PATH) &&
(DevicePathSubType (BlockIoDevicePath) == MEDIA_HARDDRIVE_DP)
) {
break;
}
BlockIoDevicePath = NextDevicePathNode (BlockIoDevicePath);
}
if (IsDevicePathEnd (BlockIoDevicePath)) {
return FALSE;
}
//
// See if the harddrive device path in blockio matches the orig Hard Drive Node
//
Node = (HARDDRIVE_DEVICE_PATH *) BlockIoDevicePath;
//
// Match Signature and PartitionNumber.
// Unused bytes in Signature are initiaized with zeros.
//
return (BOOLEAN) (
(Node->PartitionNumber == HardDriveDevicePath->PartitionNumber) &&
(Node->MBRType == HardDriveDevicePath->MBRType) &&
(Node->SignatureType == HardDriveDevicePath->SignatureType) &&
(CompareMem (Node->Signature, HardDriveDevicePath->Signature, sizeof (Node->Signature)) == 0)
);
}
/**
Emuerate all possible bootable medias in the following order:
1. Removable BlockIo - The boot option only points to the removable media
device, like USB key, DVD, Floppy etc.
2. Fixed BlockIo - The boot option only points to a Fixed blockIo device,
like HardDisk.
3. Non-BlockIo SimpleFileSystem - The boot option points to a device supporting
SimpleFileSystem Protocol, but not supporting BlockIo
protocol.
4. LoadFile - The boot option points to the media supporting
LoadFile protocol.
Reference: UEFI Spec chapter 3.3 Boot Option Variables Default Boot Behavior
@param BootOptionCount Return the boot option count which has been found.
@retval Pointer to the boot option array.
**/
EFI_BOOT_MANAGER_LOAD_OPTION *
BmEnumerateBootOptions (
UINTN *BootOptionCount
)
{
EFI_STATUS Status;
EFI_BOOT_MANAGER_LOAD_OPTION *BootOptions;
UINTN HandleCount;
EFI_HANDLE *Handles;
EFI_BLOCK_IO_PROTOCOL *BlkIo;
UINTN Removable;
UINTN Index;
CHAR16 *Description;
ASSERT (BootOptionCount != NULL);
*BootOptionCount = 0;
BootOptions = NULL;
//
// Parse removable block io followed by fixed block io
//
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiBlockIoProtocolGuid,
NULL,
&HandleCount,
&Handles
);
for (Removable = 0; Removable < 2; Removable++) {
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (
Handles[Index],
&gEfiBlockIoProtocolGuid,
(VOID **) &BlkIo
);
if (EFI_ERROR (Status)) {
continue;
}
//
// Skip the logical partitions
//
if (BlkIo->Media->LogicalPartition) {
continue;
}
//
// Skip the fixed block io then the removable block io
//
if (BlkIo->Media->RemovableMedia == ((Removable == 0) ? FALSE : TRUE)) {
continue;
}
Description = BmGetBootDescription (Handles[Index]);
BootOptions = ReallocatePool (
sizeof (EFI_BOOT_MANAGER_LOAD_OPTION) * (*BootOptionCount),
sizeof (EFI_BOOT_MANAGER_LOAD_OPTION) * (*BootOptionCount + 1),
BootOptions
);
ASSERT (BootOptions != NULL);
Status = EfiBootManagerInitializeLoadOption (
&BootOptions[(*BootOptionCount)++],
LoadOptionNumberUnassigned,
LoadOptionTypeBoot,
LOAD_OPTION_ACTIVE,
Description,
DevicePathFromHandle (Handles[Index]),
NULL,
0
);
ASSERT_EFI_ERROR (Status);
FreePool (Description);
}
}
if (HandleCount != 0) {
FreePool (Handles);
}
//
// Parse simple file system not based on block io
//
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiSimpleFileSystemProtocolGuid,
NULL,
&HandleCount,
&Handles
);
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (
Handles[Index],
&gEfiBlockIoProtocolGuid,
(VOID **) &BlkIo
);
if (!EFI_ERROR (Status)) {
//
// Skip if the file system handle supports a BlkIo protocol, which we've handled in above
//
continue;
}
Description = BmGetBootDescription (Handles[Index]);
BootOptions = ReallocatePool (
sizeof (EFI_BOOT_MANAGER_LOAD_OPTION) * (*BootOptionCount),
sizeof (EFI_BOOT_MANAGER_LOAD_OPTION) * (*BootOptionCount + 1),
BootOptions
);
ASSERT (BootOptions != NULL);
Status = EfiBootManagerInitializeLoadOption (
&BootOptions[(*BootOptionCount)++],
LoadOptionNumberUnassigned,
LoadOptionTypeBoot,
LOAD_OPTION_ACTIVE,
Description,
DevicePathFromHandle (Handles[Index]),
NULL,
0
);
ASSERT_EFI_ERROR (Status);
FreePool (Description);
}
if (HandleCount != 0) {
FreePool (Handles);
}
//
// Parse load file, assuming UEFI Network boot option
//
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiLoadFileProtocolGuid,
NULL,
&HandleCount,
&Handles
);
for (Index = 0; Index < HandleCount; Index++) {
Description = BmGetBootDescription (Handles[Index]);
BootOptions = ReallocatePool (
sizeof (EFI_BOOT_MANAGER_LOAD_OPTION) * (*BootOptionCount),
sizeof (EFI_BOOT_MANAGER_LOAD_OPTION) * (*BootOptionCount + 1),
BootOptions
);
ASSERT (BootOptions != NULL);
Status = EfiBootManagerInitializeLoadOption (
&BootOptions[(*BootOptionCount)++],
LoadOptionNumberUnassigned,
LoadOptionTypeBoot,
LOAD_OPTION_ACTIVE,
Description,
DevicePathFromHandle (Handles[Index]),
NULL,
0
);
ASSERT_EFI_ERROR (Status);
FreePool (Description);
}
if (HandleCount != 0) {
FreePool (Handles);
}
BmMakeBootOptionDescriptionUnique (BootOptions, *BootOptionCount);
return BootOptions;
}
/**
The function enumerates all boot options, creates them and registers them in the BootOrder variable.
**/
VOID
EFIAPI
EfiBootManagerRefreshAllBootOption (
VOID
)
{
EFI_STATUS Status;
EFI_BOOT_MANAGER_LOAD_OPTION *NvBootOptions;
UINTN NvBootOptionCount;
EFI_BOOT_MANAGER_LOAD_OPTION *BootOptions;
UINTN BootOptionCount;
UINTN Index;
//
// Optionally refresh the legacy boot option
//
if (mBmRefreshLegacyBootOption != NULL) {
mBmRefreshLegacyBootOption ();
}
BootOptions = BmEnumerateBootOptions (&BootOptionCount);
NvBootOptions = EfiBootManagerGetLoadOptions (&NvBootOptionCount, LoadOptionTypeBoot);
//
// Mark the boot option as added by BDS by setting OptionalData to a special GUID
//
for (Index = 0; Index < BootOptionCount; Index++) {
BootOptions[Index].OptionalData = AllocateCopyPool (sizeof (EFI_GUID), &mBmAutoCreateBootOptionGuid);
BootOptions[Index].OptionalDataSize = sizeof (EFI_GUID);
}
//
// Remove invalid EFI boot options from NV
//
for (Index = 0; Index < NvBootOptionCount; Index++) {
if (((DevicePathType (NvBootOptions[Index].FilePath) != BBS_DEVICE_PATH) ||
(DevicePathSubType (NvBootOptions[Index].FilePath) != BBS_BBS_DP)
) && BmIsAutoCreateBootOption (&NvBootOptions[Index])
) {
//
// Only check those added by BDS
// so that the boot options added by end-user or OS installer won't be deleted
//
if (EfiBootManagerFindLoadOption (&NvBootOptions[Index], BootOptions, BootOptionCount) == (UINTN) -1) {
Status = EfiBootManagerDeleteLoadOptionVariable (NvBootOptions[Index].OptionNumber, LoadOptionTypeBoot);
//
// Deleting variable with current variable implementation shouldn't fail.
//
ASSERT_EFI_ERROR (Status);
}
}
}
//
// Add new EFI boot options to NV
//
for (Index = 0; Index < BootOptionCount; Index++) {
if (EfiBootManagerFindLoadOption (&BootOptions[Index], NvBootOptions, NvBootOptionCount) == (UINTN) -1) {
EfiBootManagerAddLoadOptionVariable (&BootOptions[Index], (UINTN) -1);
//
// Try best to add the boot options so continue upon failure.
//
}
}
EfiBootManagerFreeLoadOptions (BootOptions, BootOptionCount);
EfiBootManagerFreeLoadOptions (NvBootOptions, NvBootOptionCount);
}
/**
This function is called to create the boot option for the Boot Manager Menu.
The Boot Manager Menu is shown after successfully booting a boot option.
Assume the BootManagerMenuFile is in the same FV as the module links to this library.
@param BootOption Return the boot option of the Boot Manager Menu
@retval EFI_SUCCESS Successfully register the Boot Manager Menu.
@retval Status Return status of gRT->SetVariable (). BootOption still points
to the Boot Manager Menu even the Status is not EFI_SUCCESS.
**/
EFI_STATUS
BmRegisterBootManagerMenu (
OUT EFI_BOOT_MANAGER_LOAD_OPTION *BootOption
)
{
EFI_STATUS Status;
CHAR16 *Description;
UINTN DescriptionLength;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FileNode;
Status = GetSectionFromFv (
PcdGetPtr (PcdBootManagerMenuFile),
EFI_SECTION_USER_INTERFACE,
0,
(VOID **) &Description,
&DescriptionLength
);
if (EFI_ERROR (Status)) {
Description = NULL;
}
EfiInitializeFwVolDevicepathNode (&FileNode, PcdGetPtr (PcdBootManagerMenuFile));
Status = gBS->HandleProtocol (
gImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **) &LoadedImage
);
ASSERT_EFI_ERROR (Status);
DevicePath = AppendDevicePathNode (
DevicePathFromHandle (LoadedImage->DeviceHandle),
(EFI_DEVICE_PATH_PROTOCOL *) &FileNode
);
ASSERT (DevicePath != NULL);
Status = EfiBootManagerInitializeLoadOption (
BootOption,
LoadOptionNumberUnassigned,
LoadOptionTypeBoot,
LOAD_OPTION_CATEGORY_APP | LOAD_OPTION_ACTIVE | LOAD_OPTION_HIDDEN,
(Description != NULL) ? Description : L"Boot Manager Menu",
DevicePath,
NULL,
0
);
ASSERT_EFI_ERROR (Status);
FreePool (DevicePath);
if (Description != NULL) {
FreePool (Description);
}
DEBUG_CODE (
EFI_BOOT_MANAGER_LOAD_OPTION *BootOptions;
UINTN BootOptionCount;
BootOptions = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
ASSERT (EfiBootManagerFindLoadOption (BootOption, BootOptions, BootOptionCount) == -1);
EfiBootManagerFreeLoadOptions (BootOptions, BootOptionCount);
);
return EfiBootManagerAddLoadOptionVariable (BootOption, 0);
}
/**
Return the boot option corresponding to the Boot Manager Menu.
It may automatically create one if the boot option hasn't been created yet.
@param BootOption Return the Boot Manager Menu.
@retval EFI_SUCCESS The Boot Manager Menu is successfully returned.
@retval Status Return status of gRT->SetVariable (). BootOption still points
to the Boot Manager Menu even the Status is not EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
EfiBootManagerGetBootManagerMenu (
EFI_BOOT_MANAGER_LOAD_OPTION *BootOption
)
{
EFI_STATUS Status;
UINTN BootOptionCount;
EFI_BOOT_MANAGER_LOAD_OPTION *BootOptions;
UINTN Index;
EFI_DEVICE_PATH_PROTOCOL *Node;
EFI_HANDLE FvHandle;
BootOptions = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
for (Index = 0; Index < BootOptionCount; Index++) {
Node = BootOptions[Index].FilePath;
Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &Node, &FvHandle);
if (!EFI_ERROR (Status)) {
if (CompareGuid (
EfiGetNameGuidFromFwVolDevicePathNode ((CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) Node),
PcdGetPtr (PcdBootManagerMenuFile)
)
) {
Status = EfiBootManagerInitializeLoadOption (
BootOption,
BootOptions[Index].OptionNumber,
BootOptions[Index].OptionType,
BootOptions[Index].Attributes,
BootOptions[Index].Description,
BootOptions[Index].FilePath,
BootOptions[Index].OptionalData,
BootOptions[Index].OptionalDataSize
);
ASSERT_EFI_ERROR (Status);
break;
}
}
}
EfiBootManagerFreeLoadOptions (BootOptions, BootOptionCount);
//
// Automatically create the Boot#### for Boot Manager Menu when not found.
//
if (Index == BootOptionCount) {
return BmRegisterBootManagerMenu (BootOption);
} else {
return EFI_SUCCESS;
}
}
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