diff options
Diffstat (limited to 'InOsEmuPkg/EmuSimpleFileSystemDxe/EmuSimpleFileSystem.c')
| -rw-r--r-- | InOsEmuPkg/EmuSimpleFileSystemDxe/EmuSimpleFileSystem.c | 914 |
1 files changed, 914 insertions, 0 deletions
diff --git a/InOsEmuPkg/EmuSimpleFileSystemDxe/EmuSimpleFileSystem.c b/InOsEmuPkg/EmuSimpleFileSystemDxe/EmuSimpleFileSystem.c new file mode 100644 index 0000000000..b7181fd255 --- /dev/null +++ b/InOsEmuPkg/EmuSimpleFileSystemDxe/EmuSimpleFileSystem.c @@ -0,0 +1,914 @@ +/*++ @file
+ Produce Simple File System abstractions for directories on your PC using Posix APIs.
+ The configuration of what devices to mount or emulate comes from UNIX
+ environment variables. The variables must be visible to the Microsoft*
+ Developer Studio for them to work.
+
+Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+Portions copyright (c) 2011, Apple Inc. 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 "EmuSimpleFileSystem.h"
+
+
+
+
+/**
+ Opens a new file relative to the source file's location.
+
+ @param This The protocol instance pointer.
+ @param NewHandle Returns File Handle for FileName.
+ @param FileName Null terminated string. "\", ".", and ".." are supported.
+ @param OpenMode Open mode for file.
+ @param Attributes Only used for EFI_FILE_MODE_CREATE.
+
+ @retval EFI_SUCCESS The device was opened.
+ @retval EFI_NOT_FOUND The specified file could not be found on the device.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_MEDIA_CHANGED The media has changed.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_ACCESS_DENIED The service denied access to the file.
+ @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources.
+ @retval EFI_VOLUME_FULL The volume is full.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemOpen (
+ IN EFI_FILE_PROTOCOL *This,
+ OUT EFI_FILE_PROTOCOL **NewHandle,
+ IN CHAR16 *FileName,
+ IN UINT64 OpenMode,
+ IN UINT64 Attributes
+ )
+{
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+
+ //
+ // Check for obvious invalid parameters.
+ //
+ if (This == NULL || NewHandle == NULL || FileName == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ switch (OpenMode) {
+ case EFI_FILE_MODE_CREATE | EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:
+ if (Attributes &~EFI_FILE_VALID_ATTR) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Attributes & EFI_FILE_READ_ONLY) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // fall through
+ //
+ case EFI_FILE_MODE_READ:
+ case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:
+ break;
+
+ default:
+ return EFI_INVALID_PARAMETER;
+ }
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ return PrivateFile->Io->Open (PrivateFile->Io, NewHandle, FileName, OpenMode, Attributes);
+}
+
+
+
+/**
+ Close the file handle
+
+ @param This Protocol instance pointer.
+
+ @retval EFI_SUCCESS The file was closed.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemClose (
+ IN EFI_FILE_PROTOCOL *This
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Status = PrivateFile->Io->Close (PrivateFile->Io);
+ if (!EFI_ERROR (Status)) {
+ gBS->FreePool (PrivateFile);
+ }
+
+ gBS->RestoreTPL (OldTpl);
+
+ return Status;
+}
+
+
+/**
+ Close and delete the file handle.
+
+ @param This Protocol instance pointer.
+
+ @retval EFI_SUCCESS The file was closed and deleted.
+ @retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not deleted.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemDelete (
+ IN EFI_FILE_PROTOCOL *This
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->Delete (PrivateFile->Io);
+ if (!EFI_ERROR (Status)) {
+ gBS->FreePool (PrivateFile);
+ }
+
+ gBS->RestoreTPL (OldTpl);
+
+ return Status;
+}
+
+
+/**
+ Read data from the file.
+
+ @param This Protocol instance pointer.
+ @param BufferSize On input size of buffer, on output amount of data in buffer.
+ @param Buffer The buffer in which data is read.
+
+ @retval EFI_SUCCESS Data was read.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_BUFFER_TO_SMALL BufferSize is too small. BufferSize contains required size.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemRead (
+ IN EFI_FILE_PROTOCOL *This,
+ IN OUT UINTN *BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL || BufferSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((*BufferSize != 0) && (Buffer == NULL)) {
+ // Buffer can be NULL if *BufferSize is zero
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->Read (PrivateFile->Io, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Write data to a file.
+
+ @param This Protocol instance pointer.
+ @param BufferSize On input size of buffer, on output amount of data in buffer.
+ @param Buffer The buffer in which data to write.
+
+ @retval EFI_SUCCESS Data was written.
+ @retval EFI_UNSUPPORTED Writes to Open directory are not supported.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_WRITE_PROTECTED The device is write protected.
+ @retval EFI_ACCESS_DENIED The file was open for read only.
+ @retval EFI_VOLUME_FULL The volume is full.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemWrite (
+ IN EFI_FILE_PROTOCOL *This,
+ IN OUT UINTN *BufferSize,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL || BufferSize == NULL || Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->Write (PrivateFile->Io, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Set a files current position
+
+ @param This Protocol instance pointer.
+ @param Position Byte position from the start of the file.
+
+ @retval EFI_SUCCESS Position was updated.
+ @retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemGetPosition (
+ IN EFI_FILE_PROTOCOL *This,
+ OUT UINT64 *Position
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL || Position == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->GetPosition (PrivateFile->Io, Position);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+
+/**
+ Get a file's current position
+
+ @param This Protocol instance pointer.
+ @param Position Byte position from the start of the file.
+
+ @retval EFI_SUCCESS Position was updated.
+ @retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open..
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemSetPosition (
+ IN EFI_FILE_PROTOCOL *This,
+ IN UINT64 Position
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->SetPosition (PrivateFile->Io, Position);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Get information about a file.
+
+ @param This Protocol instance pointer.
+ @param InformationType Type of information to return in Buffer.
+ @param BufferSize On input size of buffer, on output amount of data in buffer.
+ @param Buffer The buffer to return data.
+
+ @retval EFI_SUCCESS Data was returned.
+ @retval EFI_UNSUPPORTED InformationType is not supported.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_WRITE_PROTECTED The device is write protected.
+ @retval EFI_ACCESS_DENIED The file was open for read only.
+ @retval EFI_BUFFER_TOO_SMALL Buffer was too small; required size returned in BufferSize.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemGetInfo (
+ IN EFI_FILE_PROTOCOL *This,
+ IN EFI_GUID *InformationType,
+ IN OUT UINTN *BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL || InformationType == NULL || BufferSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->GetInfo (PrivateFile->Io, InformationType, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Set information about a file
+
+ @param File Protocol instance pointer.
+ @param InformationType Type of information in Buffer.
+ @param BufferSize Size of buffer.
+ @param Buffer The data to write.
+
+ @retval EFI_SUCCESS Data was set.
+ @retval EFI_UNSUPPORTED InformationType is not supported.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_WRITE_PROTECTED The device is write protected.
+ @retval EFI_ACCESS_DENIED The file was open for read only.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemSetInfo (
+ IN EFI_FILE_PROTOCOL*This,
+ IN EFI_GUID *InformationType,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ //
+ // Check for invalid parameters.
+ //
+ if (This == NULL || InformationType == NULL || BufferSize == 0 || Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->SetInfo (PrivateFile->Io, InformationType, BufferSize, Buffer);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+/**
+ Flush data back for the file handle.
+
+ @param This Protocol instance pointer.
+
+ @retval EFI_SUCCESS Data was flushed.
+ @retval EFI_UNSUPPORTED Writes to Open directory are not supported.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_WRITE_PROTECTED The device is write protected.
+ @retval EFI_ACCESS_DENIED The file was open for read only.
+ @retval EFI_VOLUME_FULL The volume is full.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemFlush (
+ IN EFI_FILE_PROTOCOL *This
+ )
+{
+ EFI_STATUS Status;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
+
+ Status = PrivateFile->Io->Flush (PrivateFile->Io);
+
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
+
+
+
+/**
+ Open the root directory on a volume.
+
+ @param This Protocol instance pointer.
+ @param Root Returns an Open file handle for the root directory
+
+ @retval EFI_SUCCESS The device was opened.
+ @retval EFI_UNSUPPORTED This volume does not support the file system.
+ @retval EFI_NO_MEDIA The device has no media.
+ @retval EFI_DEVICE_ERROR The device reported an error.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+ @retval EFI_ACCESS_DENIED The service denied access to the file.
+ @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemOpenVolume (
+ IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
+ OUT EFI_FILE_PROTOCOL **Root
+ )
+{
+ EFI_STATUS Status;
+ EMU_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
+ EMU_EFI_FILE_PRIVATE *PrivateFile;
+ EFI_TPL OldTpl;
+
+ if (This == NULL || Root == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ Private = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (This);
+
+ PrivateFile = AllocatePool (sizeof (EMU_EFI_FILE_PRIVATE));
+ if (PrivateFile == NULL) {
+ goto Done;
+ }
+
+ PrivateFile->Signature = EMU_EFI_FILE_PRIVATE_SIGNATURE;
+ PrivateFile->IoThunk = Private->IoThunk;
+ PrivateFile->SimpleFileSystem = This;
+ PrivateFile->EfiFile.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
+ PrivateFile->EfiFile.Open = EmuSimpleFileSystemOpen;
+ PrivateFile->EfiFile.Close = EmuSimpleFileSystemClose;
+ PrivateFile->EfiFile.Delete = EmuSimpleFileSystemDelete;
+ PrivateFile->EfiFile.Read = EmuSimpleFileSystemRead;
+ PrivateFile->EfiFile.Write = EmuSimpleFileSystemWrite;
+ PrivateFile->EfiFile.GetPosition = EmuSimpleFileSystemGetPosition;
+ PrivateFile->EfiFile.SetPosition = EmuSimpleFileSystemSetPosition;
+ PrivateFile->EfiFile.GetInfo = EmuSimpleFileSystemGetInfo;
+ PrivateFile->EfiFile.SetInfo = EmuSimpleFileSystemSetInfo;
+ PrivateFile->EfiFile.Flush = EmuSimpleFileSystemFlush;
+
+ *Root = &PrivateFile->EfiFile;
+
+ Status = Private->Io->OpenVolume (Private->Io, &PrivateFile->Io);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ AddUnicodeString2 (
+ "eng",
+ gEmuSimpleFileSystemComponentName.SupportedLanguages,
+ &Private->ControllerNameTable,
+ Private->IoThunk->ConfigString,
+ TRUE
+ );
+
+ AddUnicodeString2 (
+ "en",
+ gEmuSimpleFileSystemComponentName.SupportedLanguages,
+ &Private->ControllerNameTable,
+ Private->IoThunk->ConfigString,
+ FALSE
+ );
+
+
+Done:
+ if (EFI_ERROR (Status)) {
+ if (PrivateFile) {
+ gBS->FreePool (PrivateFile);
+ }
+
+ *Root = NULL;
+ }
+
+ gBS->RestoreTPL (OldTpl);
+
+ return Status;
+}
+
+/**
+ Tests to see if this driver supports a given controller. If a child device is provided,
+ it further tests to see if this driver supports creating a handle for the specified child device.
+
+ This function checks to see if the driver specified by This supports the device specified by
+ ControllerHandle. Drivers will typically use the device path attached to
+ ControllerHandle and/or the services from the bus I/O abstraction attached to
+ ControllerHandle to determine if the driver supports ControllerHandle. This function
+ may be called many times during platform initialization. In order to reduce boot times, the tests
+ performed by this function must be very small, and take as little time as possible to execute. This
+ function must not change the state of any hardware devices, and this function must be aware that the
+ device specified by ControllerHandle may already be managed by the same driver or a
+ different driver. This function must match its calls to AllocatePages() with FreePages(),
+ AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+ Because ControllerHandle may have been previously started by the same driver, if a protocol is
+ already in the opened state, then it must not be closed with CloseProtocol(). This is required
+ to guarantee the state of ControllerHandle is not modified by this function.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to test. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For bus drivers, if this parameter is not NULL, then
+ the bus driver must determine if the bus controller specified
+ by ControllerHandle and the child controller specified
+ by RemainingDevicePath are both supported by this
+ bus driver.
+
+ @retval EFI_SUCCESS The device specified by ControllerHandle and
+ RemainingDevicePath is supported by the driver specified by This.
+ @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by the driver
+ specified by This.
+ @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
+ RemainingDevicePath is already being managed by a different
+ driver or an application that requires exclusive access.
+ Currently not implemented.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
+ RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ EFI_STATUS Status;
+ EMU_IO_THUNK_PROTOCOL *EmuIoThunk;
+
+ //
+ // Open the IO Abstraction(s) needed to perform the supported test
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEmuIoThunkProtocolGuid,
+ (VOID **)&EmuIoThunk,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Make sure GUID is for a File System handle.
+ //
+ Status = EFI_UNSUPPORTED;
+ if (CompareGuid (EmuIoThunk->Protocol, &gEfiSimpleFileSystemProtocolGuid)) {
+ Status = EFI_SUCCESS;
+ }
+
+ //
+ // Close the I/O Abstraction(s) used to perform the supported test
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEmuIoThunkProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+
+ return Status;
+}
+
+
+
+/**
+ Starts a device controller or a bus controller.
+
+ The Start() function is designed to be invoked from the EFI boot service ConnectController().
+ As a result, much of the error checking on the parameters to Start() has been moved into this
+ common boot service. It is legal to call Start() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE.
+ 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+ EFI_DEVICE_PATH_PROTOCOL.
+ 3. Prior to calling Start(), the Supported() function for the driver specified by This must
+ have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle The handle of the controller to start. This handle
+ must support a protocol interface that supplies
+ an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
+ parameter is ignored by device drivers, and is optional for bus
+ drivers. For a bus driver, if this parameter is NULL, then handles
+ for all the children of Controller are created by this driver.
+ If this parameter is not NULL and the first Device Path Node is
+ not the End of Device Path Node, then only the handle for the
+ child device specified by the first Device Path Node of
+ RemainingDevicePath is created by this driver.
+ If the first Device Path Node of RemainingDevicePath is
+ the End of Device Path Node, no child handle is created by this
+ driver.
+
+ @retval EFI_SUCCESS The device was started.
+ @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+ @retval Others The driver failded to start the device.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ EFI_STATUS Status;
+ EMU_IO_THUNK_PROTOCOL *EmuIoThunk;
+ EMU_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
+ INTN i;
+
+ Private = NULL;
+
+ //
+ // Open the IO Abstraction(s) needed
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEmuIoThunkProtocolGuid,
+ (VOID **)&EmuIoThunk,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Validate GUID
+ //
+ if (!CompareGuid (EmuIoThunk->Protocol, &gEfiSimpleFileSystemProtocolGuid)) {
+ Status = EFI_UNSUPPORTED;
+ goto Done;
+ }
+
+ Private = AllocatePool (sizeof (EMU_SIMPLE_FILE_SYSTEM_PRIVATE));
+ if (Private == NULL) {
+ goto Done;
+ }
+
+ Status = EmuIoThunk->Open (EmuIoThunk);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ Private->Signature = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_SIGNATURE;
+ Private->IoThunk = EmuIoThunk;
+ Private->Io = EmuIoThunk->Interface;
+
+ Private->SimpleFileSystem.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
+ Private->SimpleFileSystem.OpenVolume = EmuSimpleFileSystemOpenVolume;
+
+ Private->ControllerNameTable = NULL;
+
+ AddUnicodeString2 (
+ "eng",
+ gEmuSimpleFileSystemComponentName.SupportedLanguages,
+ &Private->ControllerNameTable,
+ EmuIoThunk->ConfigString,
+ TRUE
+ );
+
+ AddUnicodeString2 (
+ "en",
+ gEmuSimpleFileSystemComponentName2.SupportedLanguages,
+ &Private->ControllerNameTable,
+ EmuIoThunk->ConfigString,
+ FALSE
+ );
+
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid, &Private->SimpleFileSystem,
+ NULL
+ );
+
+Done:
+ if (EFI_ERROR (Status)) {
+ if (Private != NULL) {
+ if (Private->ControllerNameTable != NULL) {
+ FreeUnicodeStringTable (Private->ControllerNameTable);
+ }
+
+ gBS->FreePool (Private);
+
+ }
+
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEmuIoThunkProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+
+ return Status;
+}
+
+
+/**
+ Stops a device controller or a bus controller.
+
+ The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+ As a result, much of the error checking on the parameters to Stop() has been moved
+ into this common boot service. It is legal to call Stop() from other locations,
+ but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+ 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+ same driver's Start() function.
+ 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+ EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+ Start() function, and the Start() function must have called OpenProtocol() on
+ ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+ @param[in] ControllerHandle A handle to the device being stopped. The handle must
+ support a bus specific I/O protocol for the driver
+ to use to stop the device.
+ @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
+ @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
+ if NumberOfChildren is 0.
+
+ @retval EFI_SUCCESS The device was stopped.
+ @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+EmuSimpleFileSystemDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ )
+{
+ EFI_STATUS Status;
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFileSystem;
+ EMU_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
+
+ //
+ // Get our context back
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ (VOID **)&SimpleFileSystem,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Private = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (SimpleFileSystem);
+ Status = Private->IoThunk->Close (Private->IoThunk);
+
+ //
+ // Uninstall the Simple File System Protocol from ControllerHandle
+ //
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid, &Private->SimpleFileSystem,
+ NULL
+ );
+ if (!EFI_ERROR (Status)) {
+ Status = gBS->CloseProtocol (
+ ControllerHandle,
+ &gEmuIoThunkProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // Free our instance data
+ //
+ FreeUnicodeStringTable (Private->ControllerNameTable);
+ gBS->FreePool (Private);
+ }
+
+ return Status;
+}
+
+
+EFI_DRIVER_BINDING_PROTOCOL gEmuSimpleFileSystemDriverBinding = {
+ EmuSimpleFileSystemDriverBindingSupported,
+ EmuSimpleFileSystemDriverBindingStart,
+ EmuSimpleFileSystemDriverBindingStop,
+ 0xa,
+ NULL,
+ NULL
+};
+
+
+
+
+/**
+ The user Entry Point for module EmuSimpleFileSystem. The user code starts with this function.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+ @retval other Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeEmuSimpleFileSystem(
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle,
+ SystemTable,
+ &gEmuSimpleFileSystemDriverBinding,
+ ImageHandle,
+ &gEmuSimpleFileSystemComponentName,
+ &gEmuSimpleFileSystemComponentName2
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
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