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

/** @file\r
*\r
*  Copyright (c) 2011-2013, 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 <Guid/ArmGlobalVariableHob.h>\r
#include "BdsInternal.h"\r
\r
extern EFI_HANDLE mImageHandle;\r
\r
EFI_STATUS\r
BootOptionStart (\r
  IN BDS_LOAD_OPTION *BootOption\r
  )\r
{\r
  EFI_STATUS                            Status;\r
  EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL*   EfiDevicePathFromTextProtocol;\r
  UINT32                                LoaderType;\r
  ARM_BDS_LOADER_OPTIONAL_DATA*         OptionalData;\r
  ARM_BDS_LINUX_ARGUMENTS*              LinuxArguments;\r
  EFI_DEVICE_PATH_PROTOCOL*             FdtDevicePath;\r
  EFI_DEVICE_PATH_PROTOCOL*             DefaultFdtDevicePath;\r
  UINTN                                 FdtDevicePathSize;\r
  UINTN                                 CmdLineSize;\r
  UINTN                                 InitrdSize;\r
  EFI_DEVICE_PATH*                      Initrd;\r
  UINT16                                LoadOptionIndexSize;\r
\r
  if (IS_ARM_BDS_BOOTENTRY (BootOption)) {\r
    Status = EFI_UNSUPPORTED;\r
    OptionalData = BootOption->OptionalData;\r
    LoaderType = ReadUnaligned32 ((CONST UINT32*)&OptionalData->Header.LoaderType);\r
\r
    if (LoaderType == BDS_LOADER_EFI_APPLICATION) {\r
      // Need to connect every drivers to ensure no dependencies are missing for the application\r
      BdsConnectAllDrivers();\r
\r
      Status = BdsStartEfiApplication (mImageHandle, BootOption->FilePathList, 0, NULL);\r
    } else if (LoaderType == BDS_LOADER_KERNEL_LINUX_ATAG) {\r
      LinuxArguments = &(OptionalData->Arguments.LinuxArguments);\r
      CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);\r
      InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);\r
\r
      if (InitrdSize > 0) {\r
        Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));\r
      } else {\r
        Initrd = NULL;\r
      }\r
\r
      Status = BdsBootLinuxAtag (BootOption->FilePathList,\r
                                 Initrd, // Initrd\r
                                 (CHAR8*)(LinuxArguments + 1)); // CmdLine\r
    } else if (LoaderType == BDS_LOADER_KERNEL_LINUX_FDT) {\r
      LinuxArguments = &(OptionalData->Arguments.LinuxArguments);\r
      CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);\r
      InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);\r
\r
      if (InitrdSize > 0) {\r
        Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));\r
      } else {\r
        Initrd = NULL;\r
      }\r
\r
      // Get the default FDT device path\r
      Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);\r
      ASSERT_EFI_ERROR(Status);\r
      DefaultFdtDevicePath = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath ((CHAR16*)PcdGetPtr(PcdFdtDevicePath));\r
\r
      // Get the FDT device path\r
      FdtDevicePathSize = GetDevicePathSize (DefaultFdtDevicePath);\r
      Status = GetEnvironmentVariable ((CHAR16 *)L"Fdt", &gArmGlobalVariableGuid,\r
                 DefaultFdtDevicePath, &FdtDevicePathSize, (VOID **)&FdtDevicePath);\r
      ASSERT_EFI_ERROR(Status);\r
\r
      Status = BdsBootLinuxFdt (BootOption->FilePathList,\r
                                Initrd, // Initrd\r
                                (CHAR8*)(LinuxArguments + 1),\r
                                FdtDevicePath);\r
\r
      FreePool (FdtDevicePath);\r
    }\r
  } else {\r
    // Set BootCurrent variable\r
    LoadOptionIndexSize = sizeof(UINT16);\r
    gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,\r
              EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
              LoadOptionIndexSize, &(BootOption->LoadOptionIndex));\r
\r
    Status = BdsStartEfiApplication (mImageHandle, BootOption->FilePathList, BootOption->OptionalDataSize, BootOption->OptionalData);\r
\r
    // Clear BootCurrent variable\r
    LoadOptionIndexSize = sizeof(UINT16);\r
    gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,\r
              EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
              0, NULL);\r
  }\r
\r
  return Status;\r
}\r
\r
EFI_STATUS\r
BootOptionList (\r
  IN OUT LIST_ENTRY *BootOptionList\r
  )\r
{\r
  EFI_STATUS                    Status;\r
  UINTN                         Index;\r
  UINT16*                       BootOrder;\r
  UINTN                         BootOrderSize;\r
  BDS_LOAD_OPTION*              BdsLoadOption;\r
  BDS_LOAD_OPTION_ENTRY*        BdsLoadOptionEntry;\r
\r
  InitializeListHead (BootOptionList);\r
\r
  // Get the Boot Option Order from the environment variable\r
  Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
  if (EFI_ERROR(Status)) {\r
    return Status;\r
  }\r
\r
  for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {\r
    Status = BootOptionFromLoadOptionIndex (BootOrder[Index], &BdsLoadOption);\r
    if (!EFI_ERROR(Status)) {\r
      BdsLoadOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool(sizeof(BDS_LOAD_OPTION_ENTRY));\r
      BdsLoadOptionEntry->BdsLoadOption = BdsLoadOption;\r
      InsertTailList (BootOptionList,&BdsLoadOptionEntry->Link);\r
    }\r
  }\r
\r
  FreePool (BootOrder);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
EFI_STATUS\r
BootOptionSetFields (\r
  IN BDS_LOAD_OPTION*           BootOption,\r
  IN UINT32                     Attributes,\r
  IN CHAR16*                    BootDescription,\r
  IN EFI_DEVICE_PATH_PROTOCOL*  DevicePath,\r
  IN ARM_BDS_LOADER_TYPE        BootType,\r
  IN ARM_BDS_LOADER_ARGUMENTS*  BootArguments\r
  )\r
{\r
  EFI_LOAD_OPTION               EfiLoadOption;\r
  UINTN                         EfiLoadOptionSize;\r
  UINTN                         BootDescriptionSize;\r
  UINTN                         BootOptionalDataSize;\r
  UINT16                        FilePathListLength;\r
  UINT8*                        EfiLoadOptionPtr;\r
  UINT8*                        InitrdPathListPtr;\r
  UINTN                         OptionalDataSize;\r
  ARM_BDS_LINUX_ARGUMENTS*      DestLinuxArguments;\r
  ARM_BDS_LINUX_ARGUMENTS*      SrcLinuxArguments;\r
\r
  // If we are overwriting an existent Boot Option then we have to free previously allocated memory\r
  if (BootOption->LoadOption) {\r
    FreePool(BootOption->LoadOption);\r
  }\r
\r
  BootDescriptionSize = StrSize (BootDescription);\r
  BootOptionalDataSize = sizeof(ARM_BDS_LOADER_OPTIONAL_DATA_HEADER);\r
  if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) || (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {\r
    BootOptionalDataSize += sizeof(ARM_BDS_LINUX_ARGUMENTS) + BootArguments->LinuxArguments.CmdLineSize + BootArguments->LinuxArguments.InitrdSize;\r
  }\r
\r
  // Compute the size of the FilePath list\r
  FilePathListLength = GetUnalignedDevicePathSize (DevicePath);\r
\r
  // Allocate the memory for the EFI Load Option\r
  EfiLoadOptionSize = sizeof(UINT32) + sizeof(UINT16) + BootDescriptionSize + FilePathListLength + BootOptionalDataSize;\r
  EfiLoadOption = (EFI_LOAD_OPTION)AllocatePool(EfiLoadOptionSize);\r
  EfiLoadOptionPtr = EfiLoadOption;\r
\r
  //\r
  // Populate the EFI Load Option and BDS Boot Option structures\r
  //\r
\r
  // Attributes fields\r
  BootOption->Attributes = Attributes;\r
  *(UINT32*)EfiLoadOptionPtr = Attributes;\r
  EfiLoadOptionPtr += sizeof(UINT32);\r
\r
  // FilePath List fields\r
  BootOption->FilePathListLength = FilePathListLength;\r
  *(UINT16*)EfiLoadOptionPtr = FilePathListLength;\r
  EfiLoadOptionPtr += sizeof(UINT16);\r
\r
  // Boot description fields\r
  BootOption->Description = (CHAR16*)EfiLoadOptionPtr;\r
  CopyMem (EfiLoadOptionPtr, BootDescription, BootDescriptionSize);\r
  EfiLoadOptionPtr += BootDescriptionSize;\r
\r
  // File path fields\r
  BootOption->FilePathList = (EFI_DEVICE_PATH_PROTOCOL*)EfiLoadOptionPtr;\r
  CopyMem (EfiLoadOptionPtr, DevicePath, FilePathListLength);\r
  EfiLoadOptionPtr += FilePathListLength;\r
\r
  // Optional Data fields, Do unaligned writes\r
  BootOption->OptionalData = EfiLoadOptionPtr;\r
  WriteUnaligned32 ((UINT32 *)EfiLoadOptionPtr, ARM_BDS_OPTIONAL_DATA_SIGNATURE);\r
  WriteUnaligned32 ((UINT32 *)(EfiLoadOptionPtr + 4), BootType);\r
\r
  OptionalDataSize = sizeof(ARM_BDS_LOADER_OPTIONAL_DATA_HEADER);\r
\r
  if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) || (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {\r
    SrcLinuxArguments = &(BootArguments->LinuxArguments);\r
    DestLinuxArguments = &((ARM_BDS_LOADER_OPTIONAL_DATA*)EfiLoadOptionPtr)->Arguments.LinuxArguments;\r
\r
    WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->CmdLineSize), SrcLinuxArguments->CmdLineSize);\r
    WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->InitrdSize), SrcLinuxArguments->InitrdSize);\r
    OptionalDataSize += sizeof (ARM_BDS_LINUX_ARGUMENTS);\r
\r
    if (SrcLinuxArguments->CmdLineSize > 0) {\r
      CopyMem ((VOID*)(DestLinuxArguments + 1), (VOID*)(SrcLinuxArguments + 1), SrcLinuxArguments->CmdLineSize);\r
      OptionalDataSize += SrcLinuxArguments->CmdLineSize;\r
    }\r
\r
    if (SrcLinuxArguments->InitrdSize > 0) {\r
      InitrdPathListPtr = (UINT8*)((UINTN)(DestLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize);\r
      CopyMem (InitrdPathListPtr, (VOID*)((UINTN)(SrcLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize), SrcLinuxArguments->InitrdSize);\r
    }\r
  }\r
  BootOption->OptionalDataSize = OptionalDataSize;\r
\r
  // If this function is called at the creation of the Boot Device entry (not at the update) the\r
  // BootOption->LoadOptionSize must be zero then we get a new BootIndex for this entry\r
  if (BootOption->LoadOptionSize == 0) {\r
    BootOption->LoadOptionIndex = BootOptionAllocateBootIndex ();\r
  }\r
\r
  // Fill the EFI Load option fields\r
  BootOption->LoadOption = EfiLoadOption;\r
  BootOption->LoadOptionSize = EfiLoadOptionSize;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
BootOptionCreate (\r
  IN  UINT32                    Attributes,\r
  IN  CHAR16*                   BootDescription,\r
  IN  EFI_DEVICE_PATH_PROTOCOL* DevicePath,\r
  IN  ARM_BDS_LOADER_TYPE       BootType,\r
  IN  ARM_BDS_LOADER_ARGUMENTS* BootArguments,\r
  OUT BDS_LOAD_OPTION**         BdsLoadOption\r
  )\r
{\r
  EFI_STATUS                    Status;\r
  BDS_LOAD_OPTION_ENTRY*        BootOptionEntry;\r
  BDS_LOAD_OPTION*              BootOption;\r
  CHAR16                        BootVariableName[9];\r
  UINT16*                       BootOrder;\r
  UINTN                         BootOrderSize;\r
\r
  //\r
  // Allocate and fill the memory for the BDS Load Option structure\r
  //\r
  BootOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool (sizeof (BDS_LOAD_OPTION_ENTRY));\r
  InitializeListHead (&BootOptionEntry->Link);\r
  BootOptionEntry->BdsLoadOption = (BDS_LOAD_OPTION*)AllocateZeroPool (sizeof(BDS_LOAD_OPTION));\r
\r
  BootOption = BootOptionEntry->BdsLoadOption;\r
  BootOptionSetFields (BootOption, Attributes, BootDescription, DevicePath, BootType, BootArguments);\r
\r
  //\r
  // Set the related environment variables\r
  //\r
\r
  // Create Boot#### environment variable\r
  UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BootOption->LoadOptionIndex);\r
  Status = gRT->SetVariable (\r
      BootVariableName,\r
      &gEfiGlobalVariableGuid,\r
      EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
      BootOption->LoadOptionSize,\r
      BootOption->LoadOption\r
      );\r
\r
  // Add the new Boot Index to the list\r
  Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
  if (!EFI_ERROR(Status)) {\r
    BootOrder = ReallocatePool (BootOrderSize, BootOrderSize + sizeof(UINT16), BootOrder);\r
    // Add the new index at the end\r
    BootOrder[BootOrderSize / sizeof(UINT16)] = BootOption->LoadOptionIndex;\r
    BootOrderSize += sizeof(UINT16);\r
  } else {\r
    // BootOrder does not exist. Create it\r
    BootOrderSize = sizeof(UINT16);\r
    BootOrder = &(BootOption->LoadOptionIndex);\r
  }\r
\r
  // Update (or Create) the BootOrder environment variable\r
  Status = gRT->SetVariable (\r
      L"BootOrder",\r
      &gEfiGlobalVariableGuid,\r
      EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
      BootOrderSize,\r
      BootOrder\r
      );\r
\r
  // We only free it if the UEFI Variable 'BootOrder' was already existing\r
  if (BootOrderSize > sizeof(UINT16)) {\r
    FreePool (BootOrder);\r
  }\r
\r
  *BdsLoadOption = BootOption;\r
  return Status;\r
}\r
\r
EFI_STATUS\r
BootOptionUpdate (\r
  IN  BDS_LOAD_OPTION*          BdsLoadOption,\r
  IN  UINT32                    Attributes,\r
  IN  CHAR16*                   BootDescription,\r
  IN  EFI_DEVICE_PATH_PROTOCOL* DevicePath,\r
  IN  ARM_BDS_LOADER_TYPE       BootType,\r
  IN  ARM_BDS_LOADER_ARGUMENTS* BootArguments\r
  )\r
{\r
  EFI_STATUS      Status;\r
  CHAR16          BootVariableName[9];\r
\r
  // Update the BDS Load Option structure\r
  BootOptionSetFields (BdsLoadOption, Attributes, BootDescription, DevicePath, BootType, BootArguments);\r
\r
  // Update the related environment variables\r
  UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BdsLoadOption->LoadOptionIndex);\r
\r
  Status = gRT->SetVariable (\r
      BootVariableName,\r
      &gEfiGlobalVariableGuid,\r
      EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
      BdsLoadOption->LoadOptionSize,\r
      BdsLoadOption->LoadOption\r
      );\r
\r
  return Status;\r
}\r
\r
EFI_STATUS\r
BootOptionDelete (\r
  IN  BDS_LOAD_OPTION *BootOption\r
  )\r
{\r
  UINTN         Index;\r
  UINTN         BootOrderSize;\r
  UINT16*       BootOrder;\r
  UINTN         BootOrderCount;\r
  EFI_STATUS    Status;\r
\r
  // Remove the entry from the BootOrder environment variable\r
  Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
  if (!EFI_ERROR(Status)) {\r
    BootOrderCount = BootOrderSize / sizeof(UINT16);\r
\r
    // Find the index of the removed entry\r
    for (Index = 0; Index < BootOrderCount; Index++) {\r
      if (BootOrder[Index] == BootOption->LoadOptionIndex) {\r
        // If it the last entry we do not need to rearrange the BootOrder list\r
        if (Index + 1 != BootOrderCount) {\r
          CopyMem (\r
            &BootOrder[Index],\r
            &BootOrder[Index + 1],\r
            (BootOrderCount - (Index + 1)) * sizeof(UINT16)\r
            );\r
        }\r
        break;\r
      }\r
    }\r
\r
    // Update the BootOrder environment variable\r
    Status = gRT->SetVariable (\r
        L"BootOrder",\r
        &gEfiGlobalVariableGuid,\r
        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
        BootOrderSize - sizeof(UINT16),\r
        BootOrder\r
        );\r
  }\r
\r
  FreePool (BootOrder);\r
\r
  return EFI_SUCCESS;\r
}\r
Commit	Line	Data
ea46ebbe	1	/** @file\r
ea46ebbe	2	*\r
9127a094	3	* Copyright (c) 2011-2013, ARM Limited. All rights reserved.\r
ea46ebbe	4	*\r
	5	* This program and the accompanying materials\r
	6	* are licensed and made available under the terms and conditions of the BSD License\r
	7	* which accompanies this distribution. The full text of the license may be found at\r
	8	* http://opensource.org/licenses/bsd-license.php\r
	9	*\r
	10	* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	*\r
	13	**/\r
	14	\r
c0b2e477	15	#include <Guid/ArmGlobalVariableHob.h>\r
ea46ebbe	16	#include "BdsInternal.h"\r
	17	\r
	18	extern EFI_HANDLE mImageHandle;\r
	19	\r
	20	EFI_STATUS\r
	21	BootOptionStart (\r
	22	IN BDS_LOAD_OPTION *BootOption\r
	23	)\r
	24	{\r
c60ea9a8	25	EFI_STATUS Status;\r
c60ea9a8	26	EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL* EfiDevicePathFromTextProtocol;\r
c60ea9a8	27	UINT32 LoaderType;\r
2ccfb71e	28	ARM_BDS_LOADER_OPTIONAL_DATA* OptionalData;\r
	29	ARM_BDS_LINUX_ARGUMENTS* LinuxArguments;\r
	30	EFI_DEVICE_PATH_PROTOCOL* FdtDevicePath;\r
	31	EFI_DEVICE_PATH_PROTOCOL* DefaultFdtDevicePath;\r
	32	UINTN FdtDevicePathSize;\r
	33	UINTN CmdLineSize;\r
	34	UINTN InitrdSize;\r
	35	EFI_DEVICE_PATH* Initrd;\r
91213ad3	36	UINT16 LoadOptionIndexSize;\r
2ccfb71e	37	\r
a6e97d28	38	if (IS_ARM_BDS_BOOTENTRY (BootOption)) {\r
2ccfb71e	39	Status = EFI_UNSUPPORTED;\r
	40	OptionalData = BootOption->OptionalData;\r
	41	LoaderType = ReadUnaligned32 ((CONST UINT32*)&OptionalData->Header.LoaderType);\r
	42	\r
	43	if (LoaderType == BDS_LOADER_EFI_APPLICATION) {\r
	44	// Need to connect every drivers to ensure no dependencies are missing for the application\r
	45	BdsConnectAllDrivers();\r
	46	\r
	47	Status = BdsStartEfiApplication (mImageHandle, BootOption->FilePathList, 0, NULL);\r
	48	} else if (LoaderType == BDS_LOADER_KERNEL_LINUX_ATAG) {\r
	49	LinuxArguments = &(OptionalData->Arguments.LinuxArguments);\r
	50	CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);\r
	51	InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);\r
	52	\r
	53	if (InitrdSize > 0) {\r
	54	Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));\r
	55	} else {\r
	56	Initrd = NULL;\r
	57	}\r
ea46ebbe	58	\r
76d17c31	59	Status = BdsBootLinuxAtag (BootOption->FilePathList,\r
2ccfb71e	60	Initrd, // Initrd\r
76d17c31	61	(CHAR8*)(LinuxArguments + 1)); // CmdLine\r
2ccfb71e	62	} else if (LoaderType == BDS_LOADER_KERNEL_LINUX_FDT) {\r
	63	LinuxArguments = &(OptionalData->Arguments.LinuxArguments);\r
	64	CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);\r
	65	InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);\r
	66	\r
	67	if (InitrdSize > 0) {\r
	68	Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));\r
	69	} else {\r
	70	Initrd = NULL;\r
	71	}\r
	72	\r
	73	// Get the default FDT device path\r
	74	Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);\r
	75	ASSERT_EFI_ERROR(Status);\r
	76	DefaultFdtDevicePath = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath ((CHAR16*)PcdGetPtr(PcdFdtDevicePath));\r
	77	\r
	78	// Get the FDT device path\r
	79	FdtDevicePathSize = GetDevicePathSize (DefaultFdtDevicePath);\r
c0b2e477	80	Status = GetEnvironmentVariable ((CHAR16 *)L"Fdt", &gArmGlobalVariableGuid,\r
c0b2e477	81	DefaultFdtDevicePath, &FdtDevicePathSize, (VOID **)&FdtDevicePath);\r
2ccfb71e	82	ASSERT_EFI_ERROR(Status);\r
2ccfb71e	83	\r
76d17c31	84	Status = BdsBootLinuxFdt (BootOption->FilePathList,\r
2ccfb71e	85	Initrd, // Initrd\r
	86	(CHAR8*)(LinuxArguments + 1),\r
	87	FdtDevicePath);\r
b148591a	88	\r
b148591a	89	FreePool (FdtDevicePath);\r
a6e97d28	90	}\r
a6e97d28	91	} else {\r
91213ad3	92	// Set BootCurrent variable\r
	93	LoadOptionIndexSize = sizeof(UINT16);\r
	94	gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,\r
	95	EFI_VARIABLE_BOOTSERVICE_ACCESS \| EFI_VARIABLE_RUNTIME_ACCESS,\r
	96	LoadOptionIndexSize, &(BootOption->LoadOptionIndex));\r
	97	\r
2755d844	98	Status = BdsStartEfiApplication (mImageHandle, BootOption->FilePathList, BootOption->OptionalDataSize, BootOption->OptionalData);\r
91213ad3	99	\r
	100	// Clear BootCurrent variable\r
	101	LoadOptionIndexSize = sizeof(UINT16);\r
	102	gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,\r
	103	EFI_VARIABLE_BOOTSERVICE_ACCESS \| EFI_VARIABLE_RUNTIME_ACCESS,\r
	104	0, NULL);\r
a6e97d28	105	}\r
ea46ebbe	106	\r
	107	return Status;\r
	108	}\r
	109	\r
ea46ebbe	110	EFI_STATUS\r
	111	BootOptionList (\r
	112	IN OUT LIST_ENTRY *BootOptionList\r
	113	)\r
	114	{\r
a6e97d28	115	EFI_STATUS Status;\r
	116	UINTN Index;\r
	117	UINT16* BootOrder;\r
	118	UINTN BootOrderSize;\r
	119	BDS_LOAD_OPTION* BdsLoadOption;\r
	120	BDS_LOAD_OPTION_ENTRY* BdsLoadOptionEntry;\r
ea46ebbe	121	\r
	122	InitializeListHead (BootOptionList);\r
	123	\r
	124	// Get the Boot Option Order from the environment variable\r
c0b2e477	125	Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
ea46ebbe	126	if (EFI_ERROR(Status)) {\r
	127	return Status;\r
	128	}\r
	129	\r
	130	for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {\r
4aa24170	131	Status = BootOptionFromLoadOptionIndex (BootOrder[Index], &BdsLoadOption);\r
ea46ebbe	132	if (!EFI_ERROR(Status)) {\r
a6e97d28	133	BdsLoadOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool(sizeof(BDS_LOAD_OPTION_ENTRY));\r
	134	BdsLoadOptionEntry->BdsLoadOption = BdsLoadOption;\r
	135	InsertTailList (BootOptionList,&BdsLoadOptionEntry->Link);\r
ea46ebbe	136	}\r
	137	}\r
	138	\r
b148591a	139	FreePool (BootOrder);\r
b148591a	140	\r
ea46ebbe	141	return EFI_SUCCESS;\r
	142	}\r
	143	\r
ea46ebbe	144	STATIC\r
	145	EFI_STATUS\r
	146	BootOptionSetFields (\r
c60ea9a8	147	IN BDS_LOAD_OPTION* BootOption,\r
	148	IN UINT32 Attributes,\r
	149	IN CHAR16* BootDescription,\r
	150	IN EFI_DEVICE_PATH_PROTOCOL* DevicePath,\r
2ccfb71e	151	IN ARM_BDS_LOADER_TYPE BootType,\r
2ccfb71e	152	IN ARM_BDS_LOADER_ARGUMENTS* BootArguments\r
ea46ebbe	153	)\r
ea46ebbe	154	{\r
2ccfb71e	155	EFI_LOAD_OPTION EfiLoadOption;\r
	156	UINTN EfiLoadOptionSize;\r
	157	UINTN BootDescriptionSize;\r
	158	UINTN BootOptionalDataSize;\r
	159	UINT16 FilePathListLength;\r
	160	UINT8* EfiLoadOptionPtr;\r
	161	UINT8* InitrdPathListPtr;\r
	162	UINTN OptionalDataSize;\r
	163	ARM_BDS_LINUX_ARGUMENTS* DestLinuxArguments;\r
	164	ARM_BDS_LINUX_ARGUMENTS* SrcLinuxArguments;\r
ea46ebbe	165	\r
	166	// If we are overwriting an existent Boot Option then we have to free previously allocated memory\r
	167	if (BootOption->LoadOption) {\r
	168	FreePool(BootOption->LoadOption);\r
	169	}\r
	170	\r
2ccfb71e	171	BootDescriptionSize = StrSize (BootDescription);\r
	172	BootOptionalDataSize = sizeof(ARM_BDS_LOADER_OPTIONAL_DATA_HEADER);\r
	173	if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) \|\| (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {\r
	174	BootOptionalDataSize += sizeof(ARM_BDS_LINUX_ARGUMENTS) + BootArguments->LinuxArguments.CmdLineSize + BootArguments->LinuxArguments.InitrdSize;\r
	175	}\r
ea46ebbe	176	\r
ea46ebbe	177	// Compute the size of the FilePath list\r
2ccfb71e	178	FilePathListLength = GetUnalignedDevicePathSize (DevicePath);\r
656416bc	179	\r
ea46ebbe	180	// Allocate the memory for the EFI Load Option\r
	181	EfiLoadOptionSize = sizeof(UINT32) + sizeof(UINT16) + BootDescriptionSize + FilePathListLength + BootOptionalDataSize;\r
	182	EfiLoadOption = (EFI_LOAD_OPTION)AllocatePool(EfiLoadOptionSize);\r
	183	EfiLoadOptionPtr = EfiLoadOption;\r
	184	\r
	185	//\r
	186	// Populate the EFI Load Option and BDS Boot Option structures\r
	187	//\r
	188	\r
	189	// Attributes fields\r
	190	BootOption->Attributes = Attributes;\r
	191	(UINT32)EfiLoadOptionPtr = Attributes;\r
	192	EfiLoadOptionPtr += sizeof(UINT32);\r
	193	\r
	194	// FilePath List fields\r
	195	BootOption->FilePathListLength = FilePathListLength;\r
	196	(UINT16)EfiLoadOptionPtr = FilePathListLength;\r
	197	EfiLoadOptionPtr += sizeof(UINT16);\r
	198	\r
	199	// Boot description fields\r
	200	BootOption->Description = (CHAR16*)EfiLoadOptionPtr;\r
	201	CopyMem (EfiLoadOptionPtr, BootDescription, BootDescriptionSize);\r
	202	EfiLoadOptionPtr += BootDescriptionSize;\r
	203	\r
	204	// File path fields\r
	205	BootOption->FilePathList = (EFI_DEVICE_PATH_PROTOCOL*)EfiLoadOptionPtr;\r
2ccfb71e	206	CopyMem (EfiLoadOptionPtr, DevicePath, FilePathListLength);\r
2ccfb71e	207	EfiLoadOptionPtr += FilePathListLength;\r
ea46ebbe	208	\r
ea46ebbe	209	// Optional Data fields, Do unaligned writes\r
2ccfb71e	210	BootOption->OptionalData = EfiLoadOptionPtr;\r
	211	WriteUnaligned32 ((UINT32 *)EfiLoadOptionPtr, ARM_BDS_OPTIONAL_DATA_SIGNATURE);\r
	212	WriteUnaligned32 ((UINT32 *)(EfiLoadOptionPtr + 4), BootType);\r
ea46ebbe	213	\r
2ccfb71e	214	OptionalDataSize = sizeof(ARM_BDS_LOADER_OPTIONAL_DATA_HEADER);\r
ea46ebbe	215	\r
2ccfb71e	216	if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) \|\| (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {\r
	217	SrcLinuxArguments = &(BootArguments->LinuxArguments);\r
	218	DestLinuxArguments = &((ARM_BDS_LOADER_OPTIONAL_DATA*)EfiLoadOptionPtr)->Arguments.LinuxArguments;\r
656416bc	219	\r
2ccfb71e	220	WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->CmdLineSize), SrcLinuxArguments->CmdLineSize);\r
	221	WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->InitrdSize), SrcLinuxArguments->InitrdSize);\r
	222	OptionalDataSize += sizeof (ARM_BDS_LINUX_ARGUMENTS);\r
656416bc	223	\r
2ccfb71e	224	if (SrcLinuxArguments->CmdLineSize > 0) {\r
	225	CopyMem ((VOID)(DestLinuxArguments + 1), (VOID)(SrcLinuxArguments + 1), SrcLinuxArguments->CmdLineSize);\r
	226	OptionalDataSize += SrcLinuxArguments->CmdLineSize;\r
	227	}\r
656416bc	228	\r
2ccfb71e	229	if (SrcLinuxArguments->InitrdSize > 0) {\r
	230	InitrdPathListPtr = (UINT8*)((UINTN)(DestLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize);\r
	231	CopyMem (InitrdPathListPtr, (VOID*)((UINTN)(SrcLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize), SrcLinuxArguments->InitrdSize);\r
656416bc	232	}\r
656416bc	233	}\r
2ccfb71e	234	BootOption->OptionalDataSize = OptionalDataSize;\r
2ccfb71e	235	\r
6bab33c7	236	// If this function is called at the creation of the Boot Device entry (not at the update) the\r
	237	// BootOption->LoadOptionSize must be zero then we get a new BootIndex for this entry\r
	238	if (BootOption->LoadOptionSize == 0) {\r
2ccfb71e	239	BootOption->LoadOptionIndex = BootOptionAllocateBootIndex ();\r
6bab33c7	240	}\r
6bab33c7	241	\r
ea46ebbe	242	// Fill the EFI Load option fields\r
ea46ebbe	243	BootOption->LoadOption = EfiLoadOption;\r
	244	BootOption->LoadOptionSize = EfiLoadOptionSize;\r
	245	\r
	246	return EFI_SUCCESS;\r
	247	}\r
	248	\r
	249	EFI_STATUS\r
	250	BootOptionCreate (\r
c60ea9a8	251	IN UINT32 Attributes,\r
c60ea9a8	252	IN CHAR16* BootDescription,\r
ea46ebbe	253	IN EFI_DEVICE_PATH_PROTOCOL* DevicePath,\r
2ccfb71e	254	IN ARM_BDS_LOADER_TYPE BootType,\r
2ccfb71e	255	IN ARM_BDS_LOADER_ARGUMENTS* BootArguments,\r
a6e97d28	256	OUT BDS_LOAD_OPTION** BdsLoadOption\r
ea46ebbe	257	)\r
ea46ebbe	258	{\r
a6e97d28	259	EFI_STATUS Status;\r
	260	BDS_LOAD_OPTION_ENTRY* BootOptionEntry;\r
	261	BDS_LOAD_OPTION* BootOption;\r
	262	CHAR16 BootVariableName[9];\r
	263	UINT16* BootOrder;\r
	264	UINTN BootOrderSize;\r
ea46ebbe	265	\r
	266	//\r
	267	// Allocate and fill the memory for the BDS Load Option structure\r
	268	//\r
a6e97d28	269	BootOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool (sizeof (BDS_LOAD_OPTION_ENTRY));\r
	270	InitializeListHead (&BootOptionEntry->Link);\r
	271	BootOptionEntry->BdsLoadOption = (BDS_LOAD_OPTION*)AllocateZeroPool (sizeof(BDS_LOAD_OPTION));\r
ea46ebbe	272	\r
a6e97d28	273	BootOption = BootOptionEntry->BdsLoadOption;\r
ea46ebbe	274	BootOptionSetFields (BootOption, Attributes, BootDescription, DevicePath, BootType, BootArguments);\r
	275	\r
	276	//\r
	277	// Set the related environment variables\r
	278	//\r
	279	\r
	280	// Create Boot#### environment variable\r
	281	UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BootOption->LoadOptionIndex);\r
	282	Status = gRT->SetVariable (\r
	283	BootVariableName,\r
	284	&gEfiGlobalVariableGuid,\r
	285	EFI_VARIABLE_NON_VOLATILE \| EFI_VARIABLE_BOOTSERVICE_ACCESS \| EFI_VARIABLE_RUNTIME_ACCESS,\r
	286	BootOption->LoadOptionSize,\r
	287	BootOption->LoadOption\r
	288	);\r
	289	\r
	290	// Add the new Boot Index to the list\r
c0b2e477	291	Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
ea46ebbe	292	if (!EFI_ERROR(Status)) {\r
	293	BootOrder = ReallocatePool (BootOrderSize, BootOrderSize + sizeof(UINT16), BootOrder);\r
	294	// Add the new index at the end\r
	295	BootOrder[BootOrderSize / sizeof(UINT16)] = BootOption->LoadOptionIndex;\r
	296	BootOrderSize += sizeof(UINT16);\r
	297	} else {\r
	298	// BootOrder does not exist. Create it\r
	299	BootOrderSize = sizeof(UINT16);\r
	300	BootOrder = &(BootOption->LoadOptionIndex);\r
	301	}\r
	302	\r
	303	// Update (or Create) the BootOrder environment variable\r
	304	Status = gRT->SetVariable (\r
	305	L"BootOrder",\r
	306	&gEfiGlobalVariableGuid,\r
	307	EFI_VARIABLE_NON_VOLATILE \| EFI_VARIABLE_BOOTSERVICE_ACCESS \| EFI_VARIABLE_RUNTIME_ACCESS,\r
	308	BootOrderSize,\r
	309	BootOrder\r
	310	);\r
	311	\r
b148591a	312	// We only free it if the UEFI Variable 'BootOrder' was already existing\r
	313	if (BootOrderSize > sizeof(UINT16)) {\r
	314	FreePool (BootOrder);\r
	315	}\r
	316	\r
ea46ebbe	317	*BdsLoadOption = BootOption;\r
	318	return Status;\r
	319	}\r
	320	\r
	321	EFI_STATUS\r
	322	BootOptionUpdate (\r
2ccfb71e	323	IN BDS_LOAD_OPTION* BdsLoadOption,\r
	324	IN UINT32 Attributes,\r
	325	IN CHAR16* BootDescription,\r
ea46ebbe	326	IN EFI_DEVICE_PATH_PROTOCOL* DevicePath,\r
2ccfb71e	327	IN ARM_BDS_LOADER_TYPE BootType,\r
2ccfb71e	328	IN ARM_BDS_LOADER_ARGUMENTS* BootArguments\r
ea46ebbe	329	)\r
	330	{\r
	331	EFI_STATUS Status;\r
ea46ebbe	332	CHAR16 BootVariableName[9];\r
	333	\r
	334	// Update the BDS Load Option structure\r
	335	BootOptionSetFields (BdsLoadOption, Attributes, BootDescription, DevicePath, BootType, BootArguments);\r
	336	\r
	337	// Update the related environment variables\r
6bab33c7	338	UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BdsLoadOption->LoadOptionIndex);\r
6bab33c7	339	\r
ea46ebbe	340	Status = gRT->SetVariable (\r
	341	BootVariableName,\r
	342	&gEfiGlobalVariableGuid,\r
	343	EFI_VARIABLE_NON_VOLATILE \| EFI_VARIABLE_BOOTSERVICE_ACCESS \| EFI_VARIABLE_RUNTIME_ACCESS,\r
6bab33c7	344	BdsLoadOption->LoadOptionSize,\r
6bab33c7	345	BdsLoadOption->LoadOption\r
ea46ebbe	346	);\r
	347	\r
	348	return Status;\r
	349	}\r
	350	\r
	351	EFI_STATUS\r
	352	BootOptionDelete (\r
	353	IN BDS_LOAD_OPTION *BootOption\r
	354	)\r
	355	{\r
a6e97d28	356	UINTN Index;\r
	357	UINTN BootOrderSize;\r
	358	UINT16* BootOrder;\r
	359	UINTN BootOrderCount;\r
	360	EFI_STATUS Status;\r
ea46ebbe	361	\r
ea46ebbe	362	// Remove the entry from the BootOrder environment variable\r
c0b2e477	363	Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
ea46ebbe	364	if (!EFI_ERROR(Status)) {\r
	365	BootOrderCount = BootOrderSize / sizeof(UINT16);\r
	366	\r
	367	// Find the index of the removed entry\r
	368	for (Index = 0; Index < BootOrderCount; Index++) {\r
	369	if (BootOrder[Index] == BootOption->LoadOptionIndex) {\r
	370	// If it the last entry we do not need to rearrange the BootOrder list\r
	371	if (Index + 1 != BootOrderCount) {\r
9127a094	372	CopyMem (\r
	373	&BootOrder[Index],\r
	374	&BootOrder[Index + 1],\r
	375	(BootOrderCount - (Index + 1)) * sizeof(UINT16)\r
	376	);\r
ea46ebbe	377	}\r
	378	break;\r
	379	}\r
	380	}\r
	381	\r
	382	// Update the BootOrder environment variable\r
	383	Status = gRT->SetVariable (\r
	384	L"BootOrder",\r
	385	&gEfiGlobalVariableGuid,\r
	386	EFI_VARIABLE_NON_VOLATILE \| EFI_VARIABLE_BOOTSERVICE_ACCESS \| EFI_VARIABLE_RUNTIME_ACCESS,\r
	387	BootOrderSize - sizeof(UINT16),\r
	388	BootOrder\r
	389	);\r
	390	}\r
	391	\r
b148591a	392	FreePool (BootOrder);\r
b148591a	393	\r
ea46ebbe	394	return EFI_SUCCESS;\r
ea46ebbe	395	}\r