diff options
author | Guo Mang <mang.guo@intel.com> | 2017-08-02 09:54:47 +0800 |
---|---|---|
committer | Guo Mang <mang.guo@intel.com> | 2017-09-05 19:45:08 +0800 |
commit | 6c128c65b5ec0e5b8b5a0ccb165f3afd29e485f8 (patch) | |
tree | 444372d92a0ae8991fe4d15eb3937df43690dfda /MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c | |
parent | b207c6434d7a5a4502975d322312e07017e8a8cb (diff) | |
download | edk2-platforms-6c128c65b5ec0e5b8b5a0ccb165f3afd29e485f8.tar.xz |
Remove core packages since we can get them from edk2 repository
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c')
-rw-r--r-- | MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c | 846 |
1 files changed, 0 insertions, 846 deletions
diff --git a/MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c b/MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c deleted file mode 100644 index 5cc4b35fe4..0000000000 --- a/MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c +++ /dev/null @@ -1,846 +0,0 @@ -/** @file
- Library instance that implement UEFI Device Path Library class based on protocol
- gEfiDevicePathUtilitiesProtocolGuid.
-
- Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<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 <Uefi.h>
-
-#include <Protocol/DevicePathUtilities.h>
-#include <Protocol/DevicePathToText.h>
-#include <Protocol/DevicePathFromText.h>
-
-#include <Library/DevicePathLib.h>
-#include <Library/DebugLib.h>
-#include <Library/BaseLib.h>
-#include <Library/MemoryAllocationLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/PcdLib.h>
-
-GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_UTILITIES_PROTOCOL *mDevicePathLibDevicePathUtilities = NULL;
-GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLibDevicePathToText = NULL;
-GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *mDevicePathLibDevicePathFromText = NULL;
-
-//
-// Template for an end-of-device path node.
-//
-GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_PROTOCOL mUefiDevicePathLibEndDevicePath = {
- END_DEVICE_PATH_TYPE,
- END_ENTIRE_DEVICE_PATH_SUBTYPE,
- {
- END_DEVICE_PATH_LENGTH,
- 0
- }
-};
-
-/**
- The constructor function caches the pointer to DevicePathUtilites protocol.
-
- The constructor function locates DevicePathUtilities protocol from protocol database.
- It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
-
- @param ImageHandle The firmware allocated handle for the EFI image.
- @param SystemTable A pointer to the EFI System Table.
-
- @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
-
-**/
-EFI_STATUS
-EFIAPI
-DevicePathLibConstructor (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- EFI_STATUS Status;
-
- Status = gBS->LocateProtocol (
- &gEfiDevicePathUtilitiesProtocolGuid,
- NULL,
- (VOID**) &mDevicePathLibDevicePathUtilities
- );
- ASSERT_EFI_ERROR (Status);
- ASSERT (mDevicePathLibDevicePathUtilities != NULL);
- return Status;
-}
-
-/**
- Determine whether a given device path is valid.
- If DevicePath is NULL, then ASSERT().
-
- @param DevicePath A pointer to a device path data structure.
- @param MaxSize The maximum size of the device path data structure.
-
- @retval TRUE DevicePath is valid.
- @retval FALSE The length of any node node in the DevicePath is less
- than sizeof (EFI_DEVICE_PATH_PROTOCOL).
- @retval FALSE If MaxSize is not zero, the size of the DevicePath
- exceeds MaxSize.
- @retval FALSE If PcdMaximumDevicePathNodeCount is not zero, the node
- count of the DevicePath exceeds PcdMaximumDevicePathNodeCount.
-**/
-BOOLEAN
-EFIAPI
-IsDevicePathValid (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
- IN UINTN MaxSize
- )
-{
- UINTN Count;
- UINTN Size;
- UINTN NodeLength;
-
- ASSERT (DevicePath != NULL);
-
- for (Count = 0, Size = 0; !IsDevicePathEnd (DevicePath); DevicePath = NextDevicePathNode (DevicePath)) {
- NodeLength = DevicePathNodeLength (DevicePath);
- if (NodeLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) {
- return FALSE;
- }
-
- if (MaxSize > 0) {
- Size += NodeLength;
- if (Size + END_DEVICE_PATH_LENGTH > MaxSize) {
- return FALSE;
- }
- }
-
- if (PcdGet32 (PcdMaximumDevicePathNodeCount) > 0) {
- Count++;
- if (Count >= PcdGet32 (PcdMaximumDevicePathNodeCount)) {
- return FALSE;
- }
- }
- }
-
- //
- // Only return TRUE when the End Device Path node is valid.
- //
- return (BOOLEAN) (DevicePathNodeLength (DevicePath) == END_DEVICE_PATH_LENGTH);
-}
-
-/**
- Returns the Type field of a device path node.
-
- Returns the Type field of the device path node specified by Node.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @return The Type field of the device path node specified by Node.
-
-**/
-UINT8
-EFIAPI
-DevicePathType (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type;
-}
-
-/**
- Returns the SubType field of a device path node.
-
- Returns the SubType field of the device path node specified by Node.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @return The SubType field of the device path node specified by Node.
-
-**/
-UINT8
-EFIAPI
-DevicePathSubType (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType;
-}
-
-/**
- Returns the 16-bit Length field of a device path node.
-
- Returns the 16-bit Length field of the device path node specified by Node.
- Node is not required to be aligned on a 16-bit boundary, so it is recommended
- that a function such as ReadUnaligned16() be used to extract the contents of
- the Length field.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @return The 16-bit Length field of the device path node specified by Node.
-
-**/
-UINTN
-EFIAPI
-DevicePathNodeLength (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0]);
-}
-
-/**
- Returns a pointer to the next node in a device path.
-
- Returns a pointer to the device path node that follows the device path node
- specified by Node.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @return a pointer to the device path node that follows the device path node
- specified by Node.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-NextDevicePathNode (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node));
-}
-
-/**
- Determines if a device path node is an end node of a device path.
- This includes nodes that are the end of a device path instance and nodes that
- are the end of an entire device path.
-
- Determines if the device path node specified by Node is an end node of a device path.
- This includes nodes that are the end of a device path instance and nodes that are the
- end of an entire device path. If Node represents an end node of a device path,
- then TRUE is returned. Otherwise, FALSE is returned.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @retval TRUE The device path node specified by Node is an end node of a device path.
- @retval FALSE The device path node specified by Node is not an end node of
- a device path.
-
-**/
-BOOLEAN
-EFIAPI
-IsDevicePathEndType (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return (BOOLEAN) (DevicePathType (Node) == END_DEVICE_PATH_TYPE);
-}
-
-/**
- Determines if a device path node is an end node of an entire device path.
-
- Determines if a device path node specified by Node is an end node of an entire
- device path.
- If Node represents the end of an entire device path, then TRUE is returned.
- Otherwise, FALSE is returned.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @retval TRUE The device path node specified by Node is the end of an entire device path.
- @retval FALSE The device path node specified by Node is not the end of an entire device path.
-
-**/
-BOOLEAN
-EFIAPI
-IsDevicePathEnd (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE);
-}
-
-/**
- Determines if a device path node is an end node of a device path instance.
-
- Determines if a device path node specified by Node is an end node of a device
- path instance.
- If Node represents the end of a device path instance, then TRUE is returned.
- Otherwise, FALSE is returned.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
- @retval TRUE The device path node specified by Node is the end of a device
- path instance.
- @retval FALSE The device path node specified by Node is not the end of a
- device path instance.
-
-**/
-BOOLEAN
-EFIAPI
-IsDevicePathEndInstance (
- IN CONST VOID *Node
- )
-{
- ASSERT (Node != NULL);
- return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE);
-}
-
-/**
- Sets the length, in bytes, of a device path node.
-
- Sets the length of the device path node specified by Node to the value specified
- by NodeLength. NodeLength is returned. Node is not required to be aligned on
- a 16-bit boundary, so it is recommended that a function such as WriteUnaligned16()
- be used to set the contents of the Length field.
-
- If Node is NULL, then ASSERT().
- If NodeLength >= SIZE_64KB, then ASSERT().
- If NodeLength < sizeof (EFI_DEVICE_PATH_PROTOCOL), then ASSERT().
-
- @param Node A pointer to a device path node data structure.
- @param Length The length, in bytes, of the device path node.
-
- @return Length
-
-**/
-UINT16
-EFIAPI
-SetDevicePathNodeLength (
- IN OUT VOID *Node,
- IN UINTN Length
- )
-{
- ASSERT (Node != NULL);
- ASSERT ((Length >= sizeof (EFI_DEVICE_PATH_PROTOCOL)) && (Length < SIZE_64KB));
- return WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(Length));
-}
-
-/**
- Fills in all the fields of a device path node that is the end of an entire device path.
-
- Fills in all the fields of a device path node specified by Node so Node represents
- the end of an entire device path. The Type field of Node is set to
- END_DEVICE_PATH_TYPE, the SubType field of Node is set to
- END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to
- END_DEVICE_PATH_LENGTH. Node is not required to be aligned on a 16-bit boundary,
- so it is recommended that a function such as WriteUnaligned16() be used to set
- the contents of the Length field.
-
- If Node is NULL, then ASSERT().
-
- @param Node A pointer to a device path node data structure.
-
-**/
-VOID
-EFIAPI
-SetDevicePathEndNode (
- OUT VOID *Node
- )
-{
- ASSERT (Node != NULL);
- CopyMem (Node, &mUefiDevicePathLibEndDevicePath, sizeof (mUefiDevicePathLibEndDevicePath));
-}
-
-/**
- Returns the size of a device path in bytes.
-
- This function returns the size, in bytes, of the device path data structure
- specified by DevicePath including the end of device path node.
- If DevicePath is NULL or invalid, then 0 is returned.
-
- @param DevicePath A pointer to a device path data structure.
-
- @retval 0 If DevicePath is NULL or invalid.
- @retval Others The size of a device path in bytes.
-
-**/
-UINTN
-EFIAPI
-GetDevicePathSize (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-{
- return mDevicePathLibDevicePathUtilities->GetDevicePathSize (DevicePath);
-}
-
-/**
- Creates a new copy of an existing device path.
-
- This function allocates space for a new copy of the device path specified by
- DevicePath. If DevicePath is NULL, then NULL is returned.
- If the memory is successfully allocated, then the
- contents of DevicePath are copied to the newly allocated buffer, and a pointer to that buffer
- is returned. Otherwise, NULL is returned.
- The memory for the new device path is allocated from EFI boot services memory.
- It is the responsibility of the caller to free the memory allocated.
-
- @param DevicePath A pointer to a device path data structure.
-
- @retval NULL If DevicePath is NULL or invalid.
- @retval Others A pointer to the duplicated device path.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-DuplicateDevicePath (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-{
- return mDevicePathLibDevicePathUtilities->DuplicateDevicePath (DevicePath);
-}
-
-/**
- Creates a new device path by appending a second device path to a first device path.
-
- This function creates a new device path by appending a copy of SecondDevicePath to a copy of
- FirstDevicePath in a newly allocated buffer. Only the end-of-device-path device node from
- SecondDevicePath is retained. The newly created device path is returned.
- If FirstDevicePath is NULL, then it is ignored, and a duplicate of SecondDevicePath is returned.
- If SecondDevicePath is NULL, then it is ignored, and a duplicate of FirstDevicePath is returned.
- If both FirstDevicePath and SecondDevicePath are NULL, then a copy of an end-of-device-path is
- returned.
- If there is not enough memory for the newly allocated buffer, then NULL is returned.
- The memory for the new device path is allocated from EFI boot services memory. It is the
- responsibility of the caller to free the memory allocated.
-
- @param FirstDevicePath A pointer to a device path data structure.
- @param SecondDevicePath A pointer to a device path data structure.
-
- @retval NULL If there is not enough memory for the newly allocated buffer.
- @retval NULL If FirstDevicePath or SecondDevicePath is invalid.
- @retval Others A pointer to the new device path if success.
- Or a copy an end-of-device-path if both FirstDevicePath and
- SecondDevicePath are NULL.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-AppendDevicePath (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath, OPTIONAL
- IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath OPTIONAL
- )
-{
- return mDevicePathLibDevicePathUtilities->AppendDevicePath (FirstDevicePath, SecondDevicePath);
-}
-
-/**
- Creates a new path by appending the device node to the device path.
-
- This function creates a new device path by appending a copy of the device node
- specified by DevicePathNode to a copy of the device path specified by DevicePath
- in an allocated buffer.
- The end-of-device-path device node is moved after the end of the appended device node.
- If DevicePathNode is NULL then a copy of DevicePath is returned.
- If DevicePath is NULL then a copy of DevicePathNode, followed by an end-of-device
- path device node is returned.
- If both DevicePathNode and DevicePath are NULL then a copy of an end-of-device-path
- device node is returned.
- If there is not enough memory to allocate space for the new device path, then
- NULL is returned.
- The memory is allocated from EFI boot services memory. It is the responsibility
- of the caller to free the memory allocated.
-
- @param DevicePath A pointer to a device path data structure.
- @param DevicePathNode A pointer to a single device path node.
-
- @retval NULL If there is not enough memory for the new device path.
- @retval Others A pointer to the new device path if success.
- A copy of DevicePathNode followed by an end-of-device-path node
- if both FirstDevicePath and SecondDevicePath are NULL.
- A copy of an end-of-device-path node if both FirstDevicePath
- and SecondDevicePath are NULL.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-AppendDevicePathNode (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode OPTIONAL
- )
-{
- return mDevicePathLibDevicePathUtilities->AppendDeviceNode (DevicePath, DevicePathNode);
-}
-
-/**
- Creates a new device path by appending the specified device path instance to
- the specified device path.
-
- This function creates a new device path by appending a copy of the device path
- instance specified by DevicePathInstance to a copy of the device path specified
- by DevicePath in a allocated buffer.
- The end-of-device-path device node is moved after the end of the appended device
- path instance and a new end-of-device-path-instance node is inserted between.
- If DevicePath is NULL, then a copy if DevicePathInstance is returned.
- If DevicePathInstance is NULL, then NULL is returned.
- If DevicePath or DevicePathInstance is invalid, then NULL is returned.
- If there is not enough memory to allocate space for the new device path, then
- NULL is returned.
- The memory is allocated from EFI boot services memory. It is the responsibility
- of the caller to free the memory allocated.
-
- @param DevicePath A pointer to a device path data structure.
- @param DevicePathInstance A pointer to a device path instance.
-
- @return A pointer to the new device path.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-AppendDevicePathInstance (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance OPTIONAL
- )
-{
- return mDevicePathLibDevicePathUtilities->AppendDevicePathInstance (DevicePath, DevicePathInstance);
-}
-
-/**
- Creates a copy of the current device path instance and returns a pointer to the
- next device path instance.
-
- This function creates a copy of the current device path instance. It also updates
- DevicePath to point to the next device path instance in the device path (or NULL
- if no more) and updates Size to hold the size of the device path instance copy.
- If DevicePath is NULL, then NULL is returned.
- If there is not enough memory to allocate space for the new device path, then
- NULL is returned.
- The memory is allocated from EFI boot services memory. It is the responsibility
- of the caller to free the memory allocated.
- If Size is NULL, then ASSERT().
-
- @param DevicePath On input, this holds the pointer to the current
- device path instance. On output, this holds
- the pointer to the next device path instance
- or NULL if there are no more device path
- instances in the device path pointer to a
- device path data structure.
- @param Size On output, this holds the size of the device
- path instance, in bytes or zero, if DevicePath
- is NULL.
-
- @return A pointer to the current device path instance.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-GetNextDevicePathInstance (
- IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,
- OUT UINTN *Size
- )
-{
- ASSERT (Size != NULL);
- return mDevicePathLibDevicePathUtilities->GetNextDevicePathInstance (DevicePath, Size);
-}
-
-/**
- Creates a device node.
-
- This function creates a new device node in a newly allocated buffer of size
- NodeLength and initializes the device path node header with NodeType and NodeSubType.
- The new device path node is returned.
- If NodeLength is smaller than a device path header, then NULL is returned.
- If there is not enough memory to allocate space for the new device path, then
- NULL is returned.
- The memory is allocated from EFI boot services memory. It is the responsibility
- of the caller to free the memory allocated.
-
- @param NodeType The device node type for the new device node.
- @param NodeSubType The device node sub-type for the new device node.
- @param NodeLength The length of the new device node.
-
- @return The new device path.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-CreateDeviceNode (
- IN UINT8 NodeType,
- IN UINT8 NodeSubType,
- IN UINT16 NodeLength
- )
-{
- return mDevicePathLibDevicePathUtilities->CreateDeviceNode (NodeType, NodeSubType, NodeLength);
-}
-
-/**
- Determines if a device path is single or multi-instance.
-
- This function returns TRUE if the device path specified by DevicePath is
- multi-instance.
- Otherwise, FALSE is returned.
- If DevicePath is NULL or invalid, then FALSE is returned.
-
- @param DevicePath A pointer to a device path data structure.
-
- @retval TRUE DevicePath is multi-instance.
- @retval FALSE DevicePath is not multi-instance, or DevicePath
- is NULL or invalid.
-
-**/
-BOOLEAN
-EFIAPI
-IsDevicePathMultiInstance (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-{
- return mDevicePathLibDevicePathUtilities->IsDevicePathMultiInstance (DevicePath);
-}
-
-/**
- Retrieves the device path protocol from a handle.
-
- This function returns the device path protocol from the handle specified by Handle.
- If Handle is NULL or Handle does not contain a device path protocol, then NULL
- is returned.
-
- @param Handle The handle from which to retrieve the device
- path protocol.
-
- @return The device path protocol from the handle specified by Handle.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-DevicePathFromHandle (
- IN EFI_HANDLE Handle
- )
-{
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;
- EFI_STATUS Status;
-
- Status = gBS->HandleProtocol (
- Handle,
- &gEfiDevicePathProtocolGuid,
- (VOID *) &DevicePath
- );
- if (EFI_ERROR (Status)) {
- DevicePath = NULL;
- }
- return DevicePath;
-}
-
-/**
- Allocates a device path for a file and appends it to an existing device path.
-
- If Device is a valid device handle that contains a device path protocol, then
- a device path for the file specified by FileName is allocated and appended to
- the device path associated with the handle Device. The allocated device path
- is returned. If Device is NULL or Device is a handle that does not support the
- device path protocol, then a device path containing a single device path node
- for the file specified by FileName is allocated and returned.
- The memory for the new device path is allocated from EFI boot services memory.
- It is the responsibility of the caller to free the memory allocated.
-
- If FileName is NULL, then ASSERT().
- If FileName is not aligned on a 16-bit boundary, then ASSERT().
-
- @param Device A pointer to a device handle. This parameter
- is optional and may be NULL.
- @param FileName A pointer to a Null-terminated Unicode string.
-
- @return The allocated device path.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-FileDevicePath (
- IN EFI_HANDLE Device, OPTIONAL
- IN CONST CHAR16 *FileName
- )
-{
- UINTN Size;
- FILEPATH_DEVICE_PATH *FilePath;
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;
- EFI_DEVICE_PATH_PROTOCOL *FileDevicePath;
-
- DevicePath = NULL;
-
- Size = StrSize (FileName);
- FileDevicePath = AllocatePool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + END_DEVICE_PATH_LENGTH);
- if (FileDevicePath != NULL) {
- FilePath = (FILEPATH_DEVICE_PATH *) FileDevicePath;
- FilePath->Header.Type = MEDIA_DEVICE_PATH;
- FilePath->Header.SubType = MEDIA_FILEPATH_DP;
- CopyMem (&FilePath->PathName, FileName, Size);
- SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH);
- SetDevicePathEndNode (NextDevicePathNode (&FilePath->Header));
-
- if (Device != NULL) {
- DevicePath = DevicePathFromHandle (Device);
- }
-
- DevicePath = AppendDevicePath (DevicePath, FileDevicePath);
- FreePool (FileDevicePath);
- }
-
- return DevicePath;
-}
-
-/**
- Locate and return the protocol instance identified by the ProtocolGuid.
-
- @param ProtocolGuid The GUID of the protocol.
-
- @return A pointer to the protocol instance or NULL when absent.
-**/
-VOID *
-UefiDevicePathLibLocateProtocol (
- EFI_GUID *ProtocolGuid
- )
-{
- EFI_STATUS Status;
- VOID *Protocol;
- Status = gBS->LocateProtocol (
- ProtocolGuid,
- NULL,
- (VOID**) &Protocol
- );
- if (EFI_ERROR (Status)) {
- return NULL;
- } else {
- return Protocol;
- }
-}
-
-/**
- Converts a device node to its string representation.
-
- @param DeviceNode A Pointer to the device node to be converted.
- @param DisplayOnly If DisplayOnly is TRUE, then the shorter text representation
- of the display node is used, where applicable. If DisplayOnly
- is FALSE, then the longer text representation of the display node
- is used.
- @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms of text
- representation for a device node can be used, where applicable.
-
- @return A pointer to the allocated text representation of the device node or NULL if DeviceNode
- is NULL or there was insufficient memory.
-
-**/
-CHAR16 *
-EFIAPI
-ConvertDeviceNodeToText (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode,
- IN BOOLEAN DisplayOnly,
- IN BOOLEAN AllowShortcuts
- )
-{
- if (mDevicePathLibDevicePathToText == NULL) {
- mDevicePathLibDevicePathToText = UefiDevicePathLibLocateProtocol (&gEfiDevicePathToTextProtocolGuid);
- }
- if (mDevicePathLibDevicePathToText != NULL) {
- return mDevicePathLibDevicePathToText->ConvertDeviceNodeToText (DeviceNode, DisplayOnly, AllowShortcuts);
- } else {
- return NULL;
- }
-}
-
-/**
- Converts a device path to its text representation.
-
- @param DevicePath A Pointer to the device to be converted.
- @param DisplayOnly If DisplayOnly is TRUE, then the shorter text representation
- of the display node is used, where applicable. If DisplayOnly
- is FALSE, then the longer text representation of the display node
- is used.
- @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms of text
- representation for a device node can be used, where applicable.
-
- @return A pointer to the allocated text representation of the device path or
- NULL if DeviceNode is NULL or there was insufficient memory.
-
-**/
-CHAR16 *
-EFIAPI
-ConvertDevicePathToText (
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
- IN BOOLEAN DisplayOnly,
- IN BOOLEAN AllowShortcuts
- )
-{
- if (mDevicePathLibDevicePathToText == NULL) {
- mDevicePathLibDevicePathToText = UefiDevicePathLibLocateProtocol (&gEfiDevicePathToTextProtocolGuid);
- }
- if (mDevicePathLibDevicePathToText != NULL) {
- return mDevicePathLibDevicePathToText->ConvertDevicePathToText (DevicePath, DisplayOnly, AllowShortcuts);
- } else {
- return NULL;
- }
-}
-
-/**
- Convert text to the binary representation of a device node.
-
- @param TextDeviceNode TextDeviceNode points to the text representation of a device
- node. Conversion starts with the first character and continues
- until the first non-device node character.
-
- @return A pointer to the EFI device node or NULL if TextDeviceNode is NULL or there was
- insufficient memory or text unsupported.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-ConvertTextToDeviceNode (
- IN CONST CHAR16 *TextDeviceNode
- )
-{
- if (mDevicePathLibDevicePathFromText == NULL) {
- mDevicePathLibDevicePathFromText = UefiDevicePathLibLocateProtocol (&gEfiDevicePathFromTextProtocolGuid);
- }
- if (mDevicePathLibDevicePathFromText != NULL) {
- return mDevicePathLibDevicePathFromText->ConvertTextToDeviceNode (TextDeviceNode);
- } else {
- return NULL;
- }
-}
-
-/**
- Convert text to the binary representation of a device path.
-
-
- @param TextDevicePath TextDevicePath points to the text representation of a device
- path. Conversion starts with the first character and continues
- until the first non-device node character.
-
- @return A pointer to the allocated device path or NULL if TextDeviceNode is NULL or
- there was insufficient memory.
-
-**/
-EFI_DEVICE_PATH_PROTOCOL *
-EFIAPI
-ConvertTextToDevicePath (
- IN CONST CHAR16 *TextDevicePath
- )
-{
- if (mDevicePathLibDevicePathFromText == NULL) {
- mDevicePathLibDevicePathFromText = UefiDevicePathLibLocateProtocol (&gEfiDevicePathFromTextProtocolGuid);
- }
- if (mDevicePathLibDevicePathFromText != NULL) {
- return mDevicePathLibDevicePathFromText->ConvertTextToDevicePath (TextDevicePath);
- } else {
- return NULL;
- }
-}
-
|