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/** @file
*
* Copyright (c) 2011-2015, 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"
/**
Locate an EFI application in a the Firmware Volumes by its Name
@param EfiAppGuid Guid of the EFI Application into the Firmware Volume
@param DevicePath EFI Device Path of the EFI application
@return EFI_SUCCESS The function completed successfully.
@return EFI_NOT_FOUND The protocol could not be located.
@return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
**/
EFI_STATUS
LocateEfiApplicationInFvByName (
IN CONST CHAR16* EfiAppName,
OUT EFI_DEVICE_PATH **DevicePath
)
{
VOID *Key;
EFI_STATUS Status, FileStatus;
EFI_GUID NameGuid;
EFI_FV_FILETYPE FileType;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINTN Size;
UINTN UiStringLen;
CHAR16 *UiSection;
UINT32 Authentication;
EFI_DEVICE_PATH *FvDevicePath;
MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FileDevicePath;
EFI_HANDLE *HandleBuffer;
UINTN NumberOfHandles;
UINTN Index;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
ASSERT (DevicePath != NULL);
// Length of FilePath
UiStringLen = StrLen (EfiAppName);
// Locate all the Firmware Volume protocols.
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&NumberOfHandles,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
return Status;
}
*DevicePath = NULL;
// Looking for FV with ACPI storage file
for (Index = 0; Index < NumberOfHandles; Index++) {
//
// Get the protocol on this handle
// This should not fail because of LocateHandleBuffer
//
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiFirmwareVolume2ProtocolGuid,
(VOID**) &FvInstance
);
if (EFI_ERROR (Status)) {
goto FREE_HANDLE_BUFFER;
}
// Allocate Key
Key = AllocatePool (FvInstance->KeySize);
ASSERT (Key != NULL);
ZeroMem (Key, FvInstance->KeySize);
do {
// Search in all files
FileType = EFI_FV_FILETYPE_ALL;
Status = FvInstance->GetNextFile (FvInstance, Key, &FileType, &NameGuid, &Attributes, &Size);
if (!EFI_ERROR (Status)) {
UiSection = NULL;
FileStatus = FvInstance->ReadSection (
FvInstance,
&NameGuid,
EFI_SECTION_USER_INTERFACE,
0,
(VOID **)&UiSection,
&Size,
&Authentication
);
if (!EFI_ERROR (FileStatus)) {
if (StrnCmp (EfiAppName, UiSection, UiStringLen) == 0) {
//
// We found a UiString match.
//
Status = gBS->HandleProtocol (HandleBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);
// Generate the Device Path for the file
EfiInitializeFwVolDevicepathNode (&FileDevicePath, &NameGuid);
*DevicePath = AppendDevicePathNode (FvDevicePath, (EFI_DEVICE_PATH_PROTOCOL *)&FileDevicePath);
ASSERT (*DevicePath != NULL);
FreePool (Key);
FreePool (UiSection);
FreePool (HandleBuffer);
return FileStatus;
}
FreePool (UiSection);
}
}
} while (!EFI_ERROR (Status));
FreePool (Key);
}
FREE_HANDLE_BUFFER:
FreePool (HandleBuffer);
return EFI_NOT_FOUND;
}
/**
Locate an EFI application in a the Firmware Volumes by its GUID
@param EfiAppGuid Guid of the EFI Application into the Firmware Volume
@param DevicePath EFI Device Path of the EFI application
@return EFI_SUCCESS The function completed successfully.
@return EFI_NOT_FOUND The protocol could not be located.
@return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
**/
EFI_STATUS
LocateEfiApplicationInFvByGuid (
IN CONST EFI_GUID *EfiAppGuid,
OUT EFI_DEVICE_PATH **DevicePath
)
{
EFI_STATUS Status;
EFI_DEVICE_PATH *FvDevicePath;
EFI_HANDLE *HandleBuffer;
UINTN NumberOfHandles;
UINTN Index;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINT32 AuthenticationStatus;
EFI_FV_FILETYPE Type;
UINTN Size;
CHAR16 *UiSection;
MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FvFileDevicePath;
ASSERT (DevicePath != NULL);
// Locate all the Firmware Volume protocols.
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&NumberOfHandles,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
return Status;
}
*DevicePath = NULL;
// Looking for FV with ACPI storage file
for (Index = 0; Index < NumberOfHandles; Index++) {
//
// Get the protocol on this handle
// This should not fail because of LocateHandleBuffer
//
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiFirmwareVolume2ProtocolGuid,
(VOID**) &FvInstance
);
if (EFI_ERROR (Status)) {
goto FREE_HANDLE_BUFFER;
}
Status = FvInstance->ReadFile (
FvInstance,
EfiAppGuid,
NULL,
&Size,
&Type,
&Attributes,
&AuthenticationStatus
);
if (EFI_ERROR (Status)) {
//
// Skip if no EFI application file in the FV
//
continue;
} else {
UiSection = NULL;
Status = FvInstance->ReadSection (
FvInstance,
EfiAppGuid,
EFI_SECTION_USER_INTERFACE,
0,
(VOID **)&UiSection,
&Size,
&AuthenticationStatus
);
if (!EFI_ERROR (Status)) {
//
// Create the EFI Device Path for the application using the Filename of the application
//
*DevicePath = FileDevicePath (HandleBuffer[Index], UiSection);
} else {
Status = gBS->HandleProtocol (HandleBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID**)&FvDevicePath);
ASSERT_EFI_ERROR (Status);
//
// Create the EFI Device Path for the application using the EFI GUID of the application
//
EfiInitializeFwVolDevicepathNode (&FvFileDevicePath, EfiAppGuid);
*DevicePath = AppendDevicePathNode (FvDevicePath, (EFI_DEVICE_PATH_PROTOCOL *)&FvFileDevicePath);
ASSERT (*DevicePath != NULL);
}
break;
}
}
FREE_HANDLE_BUFFER:
//
// Free any allocated buffers
//
FreePool (HandleBuffer);
if (*DevicePath == NULL) {
return EFI_NOT_FOUND;
} else {
return EFI_SUCCESS;
}
}
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