Add missing module for duet package.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5088 6f19259b-4bc3-4df7-8a09-765794883524

DuetPkg/FvbRuntimeService/FileIo.c

@@ -0,0 +1,210 @@
+/**@file
+Copyright (c) 2007, Intel Corporation
+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.
+
+Module Name:
+
+    FileIo.c
+
+Abstract:
+
+  File operation for Firmware volume block driver
+
+**/
+#include "FileIo.h"
+
+//
+// Variable storage hot plug is supported but there are still some restrictions:
+// After plugging the storage back,
+// 1. Still use memory as NV if newly plugged storage is not same as the original one
+// 2. Still use memory as NV if there are some update operation during storage is unplugged.
+//
+
+
+EFI_STATUS
+FileWrite (
+  IN EFI_FILE  *File,
+  IN UINTN     Offset,
+  IN UINTN     Buffer,
+  IN UINTN     Size
+  )
+{
+  EFI_STATUS Status;
+
+  Status = File->SetPosition (File, Offset);
+  ASSERT_EFI_ERROR (Status);
+  if (!EFI_ERROR (Status)) {
+    Status = File->Write (File, &Size, (VOID *) Buffer);
+    ASSERT_EFI_ERROR (Status);
+  }
+  return Status;
+}
+
+EFI_STATUS
+CheckStore (
+  IN  EFI_HANDLE                 SimpleFileSystemHandle,
+  IN  UINT32                     VolumeId,
+  OUT EFI_DEVICE_PATH_PROTOCOL   **Device
+  )
+{
+#define BLOCK_SIZE              0x200
+#define FAT16_VOLUME_ID_OFFSET  39
+#define FAT32_VOLUME_ID_OFFSET  67
+  EFI_STATUS                      Status;
+  EFI_BLOCK_IO_PROTOCOL           *BlkIo;
+  UINT8                           BootSector[BLOCK_SIZE];
+
+  *Device = NULL;
+  Status  = gBS->HandleProtocol (
+                   SimpleFileSystemHandle,
+                   &gEfiBlockIoProtocolGuid, // BlockIo should be supported if it supports SimpleFileSystem
+                   (VOID*)&BlkIo
+                   );
+
+  if (EFI_ERROR (Status)) {
+    goto ErrHandle;
+  }
+  if (!BlkIo->Media->MediaPresent) {
+    DEBUG ((EFI_D_ERROR, "FwhMappedFile: Media not present!\n"));
+    Status = EFI_NO_MEDIA;
+    goto ErrHandle;
+  }
+  if (BlkIo->Media->ReadOnly) {
+    DEBUG ((EFI_D_ERROR, "FwhMappedFile: Media is read-only!\n"));
+    Status = EFI_ACCESS_DENIED;
+    goto ErrHandle;
+  }
+
+  Status = BlkIo->ReadBlocks(
+                    BlkIo,
+                    BlkIo->Media->MediaId,
+                    0,
+                    BLOCK_SIZE,
+                    BootSector
+                    );
+  ASSERT_EFI_ERROR (Status);
+  if ((*(UINT32 *) &BootSector[FAT16_VOLUME_ID_OFFSET] != VolumeId) &&
+      (*(UINT32 *) &BootSector[FAT32_VOLUME_ID_OFFSET] != VolumeId)
+      ) {
+    Status = EFI_NOT_FOUND;
+    goto ErrHandle;
+  }
+
+  *Device = DuplicateDevicePath (DevicePathFromHandle (SimpleFileSystemHandle));
+  ASSERT (*Device != NULL);
+
+ErrHandle:
+  return Status;
+}
+
+EFI_STATUS
+CheckStoreExists (
+  IN  EFI_DEVICE_PATH_PROTOCOL   *Device
+  )
+{
+  EFI_HANDLE                        Handle;
+  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Volume;
+  EFI_STATUS                        Status;
+
+  Status = gBS->LocateDevicePath (
+                  &gEfiSimpleFileSystemProtocolGuid,
+                  &Device, 
+                  &Handle
+                  );
+
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = gBS->HandleProtocol (
+                  Handle,
+                  &gEfiSimpleFileSystemProtocolGuid,
+                  &Volume
+                  );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  return EFI_SUCCESS;
+}
+
+VOID
+FileClose (
+  IN  EFI_FILE                   *File
+  )
+{
+  File->Flush (File);
+  File->Close (File);
+}
+EFI_STATUS
+FileOpen (
+  IN  EFI_DEVICE_PATH_PROTOCOL   *Device,
+  IN  CHAR16                     *MappedFile,
+  OUT EFI_FILE                   **File,
+  IN  UINT64                     OpenMode
+  )
+{  
+  EFI_HANDLE                        Handle;
+  EFI_FILE_HANDLE                   Root;
+  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Volume;
+  EFI_STATUS                        Status;
+
+  *File = NULL;
+
+  Status = gBS->LocateDevicePath (
+                  &gEfiSimpleFileSystemProtocolGuid,
+                  &Device, 
+                  &Handle
+                  );
+
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = gBS->HandleProtocol (
+                  Handle,
+                  &gEfiSimpleFileSystemProtocolGuid,
+                  &Volume
+                  );
+  ASSERT_EFI_ERROR (Status);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  
+  //
+  // Open the root directory of the volume
+  //
+  Root = NULL;
+  Status = Volume->OpenVolume (
+                     Volume,
+                     &Root
+                     );
+  ASSERT_EFI_ERROR (Status);
+  ASSERT (Root != NULL);
+
+  //
+  // Open file
+  //
+  Status = Root->Open (
+                   Root,
+                   File,
+                   MappedFile,
+                   OpenMode,
+                   0
+                   );
+  if (EFI_ERROR (Status)) {
+    *File = NULL;
+  }
+
+  //
+  // Close the Root directory
+  //
+  Root->Close (Root);
+  return Status;
+}