UefiPayloadPkg: Get and enter DxeCore for Universal Payload

From gUniversalPayloadExtraDataGuid Guid Hob, get the Dxe FV information,
and get the Dxe Core from the FV.
Also, make sure if there are muliple FV hob, the FV hob pointing to this FV
will be the first in the hob list.

Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>

UefiPayloadPkg/UefiPayloadEntry/LoadDxeCore.c

@@ -305,3 +305,50 @@ LoadDxeCore (
 
   return EFI_SUCCESS;
 }
+
+/**
+  Find DXE core from FV and build DXE core HOBs.
+
+  @param[in]   DxeFv                 The FV where to find the DXE core.
+  @param[out]  DxeCoreEntryPoint     DXE core entry point
+
+  @retval EFI_SUCCESS        If it completed successfully.
+  @retval EFI_NOT_FOUND      If it failed to load DXE FV.
+**/
+EFI_STATUS
+UniversalLoadDxeCore (
+  IN  EFI_FIRMWARE_VOLUME_HEADER *DxeFv,
+  OUT PHYSICAL_ADDRESS           *DxeCoreEntryPoint
+  )
+{
+  EFI_STATUS                  Status;
+  EFI_FFS_FILE_HEADER         *FileHeader;
+  VOID                        *PeCoffImage;
+  EFI_PHYSICAL_ADDRESS        ImageAddress;
+  UINT64                      ImageSize;
+
+  //
+  // Find DXE core file from DXE FV
+  //
+  Status = FvFindFile (DxeFv, EFI_FV_FILETYPE_DXE_CORE, &FileHeader);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = FileFindSection (FileHeader, EFI_SECTION_PE32, (VOID **)&PeCoffImage);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Get DXE core info
+  //
+  Status = LoadPeCoffImage (PeCoffImage, &ImageAddress, &ImageSize, DxeCoreEntryPoint);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  BuildModuleHob (&FileHeader->Name, ImageAddress, EFI_SIZE_TO_PAGES ((UINT32) ImageSize) * EFI_PAGE_SIZE, *DxeCoreEntryPoint);
+
+  return EFI_SUCCESS;
+}