ArmPlatformPkg: PL061 - rewrite the hardware interaction

[mirror_edk2.git] / ArmPlatformPkg / Bds / BootLinux.c

/** @file\r
*\r
*  Copyright (c) 2011 - 2015, 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 "BdsInternal.h"\r
\r
// This GUID is defined in the INGF file of ArmPkg/Application/LinuxLoader\r
CONST EFI_GUID mLinuxLoaderAppGuid = { 0x701f54f2, 0x0d70, 0x4b89, { 0xbc, 0x0a, 0xd9, 0xca, 0x25, 0x37, 0x90, 0x59 }};\r
\r
// Device path of the EFI Linux Loader in the Firmware Volume\r
EFI_DEVICE_PATH* mLinuxLoaderDevicePath = NULL;\r
\r
STATIC\r
BOOLEAN\r
HasFilePathEfiExtension (\r
  IN CHAR16* FilePath\r
  )\r
{\r
  return (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".EFI") == 0) ||\r
         (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".efi") == 0);\r
}\r
\r
/**\r
 * This function check if the DevicePath defines an EFI binary\r
 *\r
 * This function is used when the BDS support Linux loader to\r
 * detect if the binary is an EFI application or potentially a\r
 * Linux kernel.\r
 */\r
EFI_STATUS\r
IsEfiBinary (\r
  IN  EFI_DEVICE_PATH* DevicePath,\r
  OUT BOOLEAN          *EfiBinary\r
  )\r
{\r
  EFI_STATUS              Status;\r
  CHAR16*                 FileName;\r
  EFI_DEVICE_PATH*        PrevDevicePathNode;\r
  EFI_DEVICE_PATH*        DevicePathNode;\r
  EFI_PHYSICAL_ADDRESS    Image;\r
  UINTN                   FileSize;\r
  EFI_IMAGE_DOS_HEADER*   DosHeader;\r
  UINTN                   PeCoffHeaderOffset;\r
  EFI_IMAGE_NT_HEADERS32* NtHeader;\r
\r
  ASSERT (EfiBinary != NULL);\r
\r
  //\r
  // Check if the last node of the device path is a FilePath node\r
  //\r
  PrevDevicePathNode = NULL;\r
  DevicePathNode = DevicePath;\r
  while ((DevicePathNode != NULL) && !IsDevicePathEnd (DevicePathNode)) {\r
    PrevDevicePathNode = DevicePathNode;\r
    DevicePathNode     = NextDevicePathNode (DevicePathNode);\r
  }\r
\r
  if ((PrevDevicePathNode != NULL) &&\r
      (PrevDevicePathNode->Type == MEDIA_DEVICE_PATH) &&\r
      (PrevDevicePathNode->SubType == MEDIA_FILEPATH_DP))\r
  {\r
    FileName = ((FILEPATH_DEVICE_PATH*)PrevDevicePathNode)->PathName;\r
  } else {\r
    FileName = NULL;\r
  }\r
\r
  if (FileName == NULL) {\r
    Print (L"Is an EFI Application? ");\r
    Status = GetHIInputBoolean (EfiBinary);\r
    if (EFI_ERROR (Status)) {\r
      return EFI_ABORTED;\r
    }\r
  } else if (HasFilePathEfiExtension (FileName)) {\r
    *EfiBinary = TRUE;\r
  } else {\r
    // Check if the file exist\r
    Status = BdsLoadImage (DevicePath, AllocateAnyPages, &Image, &FileSize);\r
    if (!EFI_ERROR (Status)) {\r
\r
      DosHeader = (EFI_IMAGE_DOS_HEADER *)(UINTN) Image;\r
      if (DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r
        //\r
        // DOS image header is present,\r
        // so read the PE header after the DOS image header.\r
        //\r
        PeCoffHeaderOffset = DosHeader->e_lfanew;\r
      } else {\r
        PeCoffHeaderOffset = 0;\r
      }\r
\r
      //\r
      // Check PE/COFF image.\r
      //\r
      NtHeader = (EFI_IMAGE_NT_HEADERS32 *)(UINTN) (Image + PeCoffHeaderOffset);\r
      if (NtHeader->Signature != EFI_IMAGE_NT_SIGNATURE) {\r
        *EfiBinary = FALSE;\r
      } else {\r
        *EfiBinary = TRUE;\r
      }\r
\r
      // Free memory\r
      gBS->FreePages (Image, EFI_SIZE_TO_PAGES (FileSize));\r
    } else {\r
      // If we did not manage to open it then ask for the type\r
      Print (L"Is an EFI Application? ");\r
      Status = GetHIInputBoolean (EfiBinary);\r
      if (EFI_ERROR (Status)) {\r
        return EFI_ABORTED;\r
      }\r
    }\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r