Revision: 18655
http://sourceforge.net/p/edk2/code/18655
Author: erictian
Date: 2015-10-23 05:53:08 +0000 (Fri, 23 Oct 2015)
Log Message:
-----------
MdePkg: Add a new DxeServicesLib GetFileDevicePathFromAnyFv () function
Contributed-under: TianoCore Contribution Agreement 1.0
From: Shia Cinnamon <[email protected]>
Signed-off-by: Wang Nickle <[email protected]>
Reviewed-by: Feng Tian <[email protected]>
Modified Paths:
--------------
trunk/edk2/MdePkg/Include/Library/DxeServicesLib.h
trunk/edk2/MdePkg/Library/DxeServicesLib/DxeServicesLib.c
Modified: trunk/edk2/MdePkg/Include/Library/DxeServicesLib.h
===================================================================
--- trunk/edk2/MdePkg/Include/Library/DxeServicesLib.h 2015-10-23 05:28:38 UTC
(rev 18654)
+++ trunk/edk2/MdePkg/Include/Library/DxeServicesLib.h 2015-10-23 05:53:08 UTC
(rev 18655)
@@ -3,6 +3,7 @@
These functions help access data from sections of FFS files or from file
path.
Copyright (c) 2006 - 2012, 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 that accompanies this
distribution.
The full text of the license may be found at
@@ -262,5 +263,47 @@
OUT UINT32 *AuthenticationStatus
);
+/**
+ Searches all the available firmware volumes and returns the file device path
of first matching
+ FFS section.
+
+ This function searches all the firmware volumes for FFS files with an FFS
filename specified by NameGuid.
+ The order that the firmware volumes is searched is not deterministic. For
each FFS file found a search
+ is made for FFS sections of type SectionType.
+
+ If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
+ the search will be retried with a section type of EFI_SECTION_PE32.
+ This function must be called with a TPL <= TPL_NOTIFY.
+
+ If NameGuid is NULL, then ASSERT().
+
+ @param NameGuid A pointer to to the FFS filename GUID to
search for
+ within any of the firmware volumes in the
platform.
+ @param SectionType Indicates the FFS section type to search for
within
+ the FFS file specified by NameGuid.
+ @param SectionInstance Indicates which section instance within the
FFS file
+ specified by NameGuid to retrieve.
+ @param FvFileDevicePath Device path for the target FFS
+ file.
+
+ @retval EFI_SUCCESS The specified file device path of FFS
section was returned.
+ @retval EFI_NOT_FOUND The specified file device path of FFS
section could not be found.
+ @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due
to a
+ device error.
+ @retval EFI_ACCESS_DENIED The FFS section could not be retrieves
because the
+ firmware volume that contains the matching
FFS section does not
+ allow reads.
+ @retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+GetFileDevicePathFromAnyFv (
+ IN CONST EFI_GUID *NameGuid,
+ IN EFI_SECTION_TYPE SectionType,
+ IN UINTN SectionInstance,
+ OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath
+ );
+
#endif
Modified: trunk/edk2/MdePkg/Library/DxeServicesLib/DxeServicesLib.c
===================================================================
--- trunk/edk2/MdePkg/Library/DxeServicesLib/DxeServicesLib.c 2015-10-23
05:28:38 UTC (rev 18654)
+++ trunk/edk2/MdePkg/Library/DxeServicesLib/DxeServicesLib.c 2015-10-23
05:53:08 UTC (rev 18655)
@@ -3,6 +3,7 @@
These functions help access data from sections of FFS files or from file
path.
Copyright (c) 2007 - 2015, 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
@@ -927,3 +928,158 @@
return ImageBuffer;
}
+
+/**
+ Searches all the available firmware volumes and returns the file device path
of first matching
+ FFS section.
+
+ This function searches all the firmware volumes for FFS files with an FFS
filename specified by NameGuid.
+ The order that the firmware volumes is searched is not deterministic. For
each FFS file found a search
+ is made for FFS sections of type SectionType.
+
+ If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
+ the search will be retried with a section type of EFI_SECTION_PE32.
+ This function must be called with a TPL <= TPL_NOTIFY.
+
+ If NameGuid is NULL, then ASSERT().
+
+ @param NameGuid A pointer to to the FFS filename GUID to
search for
+ within any of the firmware volumes in the
platform.
+ @param SectionType Indicates the FFS section type to search for
within
+ the FFS file specified by NameGuid.
+ @param SectionInstance Indicates which section instance within the
FFS file
+ specified by NameGuid to retrieve.
+ @param FvFileDevicePath Device path for the target FFS
+ file.
+
+ @retval EFI_SUCCESS The specified file device path of FFS
section was returned.
+ @retval EFI_NOT_FOUND The specified file device path of FFS
section could not be found.
+ @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due
to a
+ device error.
+ @retval EFI_ACCESS_DENIED The FFS section could not be retrieves
because the
+ firmware volume that contains the matching
FFS section does not
+ allow reads.
+ @retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+GetFileDevicePathFromAnyFv (
+ IN CONST EFI_GUID *NameGuid,
+ IN EFI_SECTION_TYPE SectionType,
+ IN UINTN SectionInstance,
+ OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE *HandleBuffer;
+ UINTN HandleCount;
+ UINTN Index;
+ EFI_HANDLE FvHandle;
+ EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;
+ MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *TempFvFileDevicePath;
+ VOID *Buffer;
+ UINTN Size;
+
+ if (FvFileDevicePath == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ HandleBuffer = NULL;
+ FvDevicePath = NULL;
+ TempFvFileDevicePath = NULL;
+ Buffer = NULL;
+ Size = 0;
+
+ //
+ // Search the FV that contain the caller's FFS first.
+ // FV builder can choose to build FFS into the this FV
+ // so that this implementation of GetSectionFromAnyFv
+ // will locate the FFS faster.
+ //
+ FvHandle = InternalImageHandleToFvHandle (gImageHandle);
+ Status = InternalGetSectionFromFv (
+ FvHandle,
+ NameGuid,
+ SectionType,
+ SectionInstance,
+ &Buffer,
+ &Size
+ );
+ if (!EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiFirmwareVolume2ProtocolGuid,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ for (Index = 0; Index < HandleCount; Index++) {
+ //
+ // Skip the FV that contain the caller's FFS
+ //
+ if (HandleBuffer[Index] != FvHandle) {
+ Status = InternalGetSectionFromFv (
+ HandleBuffer[Index],
+ NameGuid,
+ SectionType,
+ SectionInstance,
+ &Buffer,
+ &Size
+ );
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // Update FvHandle to the current handle.
+ //
+ FvHandle = HandleBuffer[Index];
+ goto Done;
+ }
+ }
+ }
+
+ if (Index == HandleCount) {
+ Status = EFI_NOT_FOUND;
+ }
+
+Done:
+ if (Status == EFI_SUCCESS) {
+ //
+ // Build a device path to the file in the FV to pass into gBS->LoadImage
+ //
+ Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID
**)&FvDevicePath);
+ if (EFI_ERROR (Status)) {
+ *FvFileDevicePath = NULL;
+ } else {
+ TempFvFileDevicePath = AllocateZeroPool (sizeof
(MEDIA_FW_VOL_FILEPATH_DEVICE_PATH) + END_DEVICE_PATH_LENGTH);
+ if (TempFvFileDevicePath == NULL) {
+ *FvFileDevicePath = NULL;
+ return EFI_OUT_OF_RESOURCES;
+ }
+ EfiInitializeFwVolDevicepathNode
((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH*)TempFvFileDevicePath, NameGuid);
+ SetDevicePathEndNode (NextDevicePathNode (TempFvFileDevicePath));
+ *FvFileDevicePath = AppendDevicePath (
+ FvDevicePath,
+ (EFI_DEVICE_PATH_PROTOCOL *)TempFvFileDevicePath
+ );
+ FreePool (TempFvFileDevicePath);
+ }
+ }
+
+ if (Buffer != NULL) {
+ FreePool (Buffer);
+ }
+
+ if (HandleBuffer != NULL) {
+ FreePool (HandleBuffer);
+ }
+
+ return Status;
+}
------------------------------------------------------------------------------
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