ArmPlatformPkg/Bds: Remove any use of the "Fdt" UEFI variable

[mirror_edk2.git] / ArmPkg / Application / LinuxLoader / LinuxFdtLoader.c

/** @file\r
*\r
*  Copyright (c) 2011, ARM Limited. All rights reserved.\r
*\r
*  This program and the accompanying materials\r
*  are licensed and made available under the terms and conditions of the BSD License\r
*  which accompanies this distribution.  The full text of the license may be found at\r
*  http://opensource.org/licenses/bsd-license.php\r
*\r
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
*\r
**/\r
\r
#include "LinuxInternal.h"\r
\r
#include <Library/PrintLib.h>\r
#include <Library/UefiApplicationEntryPoint.h>\r
\r
/**\r
  The user Entry Point for Application. The user code starts with this function\r
  as the real entry point for the application.\r
\r
  @param[in] ImageHandle    The firmware allocated handle for the EFI image.\r
  @param[in] SystemTable    A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS       The entry point is executed successfully.\r
  @retval other             Some error occurs when executing this entry point.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
UefiMain (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS                   Status;\r
  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;\r
  LINUX_LOADER_OPTIONAL_DATA*  LinuxOptionalData;\r
  EFI_DEVICE_PATH*             DevicePathKernel;\r
  EFI_DEVICE_PATH*             InitrdDevicePath;\r
  CHAR16*                      OptionalDataInitrd;\r
  CHAR8*                       OptionalDataArguments;\r
  CHAR16*                      Initrd;\r
\r
  Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **)&LoadedImage);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  if (LoadedImage->LoadOptionsSize == 0) {\r
    Status = LinuxLoaderConfig (LoadedImage);\r
  } else {\r
    // Ensure the signature is correct\r
    LinuxOptionalData = (LINUX_LOADER_OPTIONAL_DATA*)LoadedImage->LoadOptions;\r
    if (LinuxOptionalData->Signature != LINUX_LOADER_SIGNATURE) {\r
      return EFI_UNSUPPORTED;\r
    }\r
\r
    // Generate the File Path Node for the Linux Kernel\r
    DevicePathKernel = FileDevicePath (LoadedImage->DeviceHandle, LINUX_KERNEL_NAME);\r
\r
    if (LinuxOptionalData->CmdLineLength > 0) {\r
      OptionalDataArguments = (CHAR8*)LinuxOptionalData + sizeof(LINUX_LOADER_OPTIONAL_DATA);\r
    } else {\r
      OptionalDataArguments = NULL;\r
    }\r
\r
    if (LinuxOptionalData->InitrdPathListLength > 0) {\r
      if (OptionalDataArguments != NULL) {\r
        OptionalDataInitrd = (CHAR16*)(OptionalDataArguments + LinuxOptionalData->CmdLineLength);\r
      } else {\r
        OptionalDataInitrd = (CHAR16*)LinuxOptionalData + sizeof(LINUX_LOADER_OPTIONAL_DATA);\r
      }\r
\r
      // If pointer not aligned\r
      if ((UINTN)OptionalDataInitrd & 0x1) {\r
        Initrd = (CHAR16*)AllocateCopyPool (LinuxOptionalData->InitrdPathListLength, OptionalDataInitrd);\r
      } else {\r
        Initrd = OptionalDataInitrd;\r
      }\r
\r
      InitrdDevicePath = FileDevicePath (LoadedImage->DeviceHandle, Initrd);\r
    } else {\r
      OptionalDataInitrd = NULL;\r
      InitrdDevicePath   = NULL;\r
      Initrd             = NULL;\r
    }\r
\r
    // Load and Start the Linux Kernel (we should never return)\r
    Status = BdsBootLinuxFdt (DevicePathKernel, InitrdDevicePath, OptionalDataArguments);\r
\r
    if ((UINTN)OptionalDataInitrd & 0x1) {\r
      FreePool (Initrd);\r
    }\r
\r
    FreePool (DevicePathKernel);\r
    if (InitrdDevicePath) {\r
      FreePool (InitrdDevicePath);\r
    }\r
  }\r
\r
  return Status;\r
}\r