ArmPlatformPkg/Bds/BootOption.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2014, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #include <Guid/ArmGlobalVariableHob.h>
  16 #include "BdsInternal.h"
  17
  18 EFI_STATUS
  19 BootOptionStart (
  20   IN BDS_LOAD_OPTION *BootOption
  21   )
  22 {
  23   EFI_STATUS                            Status;
  24   EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL*   EfiDevicePathFromTextProtocol;
  25   UINT32                                LoaderType;
  26   ARM_BDS_LOADER_OPTIONAL_DATA*         OptionalData;
  27   ARM_BDS_LINUX_ARGUMENTS*              LinuxArguments;
  28   EFI_DEVICE_PATH_PROTOCOL*             FdtDevicePath;
  29   EFI_DEVICE_PATH_PROTOCOL*             DefaultFdtDevicePath;
  30   UINTN                                 FdtDevicePathSize;
  31   UINTN                                 CmdLineSize;
  32   UINTN                                 InitrdSize;
  33   EFI_DEVICE_PATH*                      Initrd;
  34   UINT16                                LoadOptionIndexSize;
  35
  36   if (IS_ARM_BDS_BOOTENTRY (BootOption)) {
  37     Status = EFI_UNSUPPORTED;
  38     OptionalData = BootOption->OptionalData;
  39     LoaderType = ReadUnaligned32 ((CONST UINT32*)&OptionalData->Header.LoaderType);
  40
  41     if (LoaderType == BDS_LOADER_EFI_APPLICATION) {
  42       if ((BootOption->Attributes & LOAD_OPTION_CATEGORY_BOOT) == 0) {
  43         // Need to connect every drivers to ensure no dependencies are missing for the application
  44         BdsConnectAllDrivers ();
  45       }
  46
  47       Status = BdsStartEfiApplication (gImageHandle, BootOption->FilePathList, 0, NULL);
  48     } else if (LoaderType == BDS_LOADER_KERNEL_LINUX_ATAG) {
  49       LinuxArguments = &(OptionalData->Arguments.LinuxArguments);
  50       CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);
  51       InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);
  52
  53       if (InitrdSize > 0) {
  54         Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));
  55       } else {
  56         Initrd = NULL;
  57       }
  58
  59       Status = BdsBootLinuxAtag (BootOption->FilePathList,
  60                                  Initrd, // Initrd
  61                                  (CHAR8*)(LinuxArguments + 1)); // CmdLine
  62     } else if (LoaderType == BDS_LOADER_KERNEL_LINUX_FDT) {
  63       LinuxArguments = &(OptionalData->Arguments.LinuxArguments);
  64       CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);
  65       InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);
  66
  67       if (InitrdSize > 0) {
  68         Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));
  69       } else {
  70         Initrd = NULL;
  71       }
  72
  73       // Get the default FDT device path
  74       Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);
  75       ASSERT_EFI_ERROR(Status);
  76       DefaultFdtDevicePath = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath ((CHAR16*)PcdGetPtr(PcdFdtDevicePath));
  77
  78       // Get the FDT device path
  79       FdtDevicePathSize = GetDevicePathSize (DefaultFdtDevicePath);
  80       Status = GetEnvironmentVariable ((CHAR16 *)L"Fdt", &gArmGlobalVariableGuid,
  81                  DefaultFdtDevicePath, &FdtDevicePathSize, (VOID **)&FdtDevicePath);
  82       ASSERT_EFI_ERROR(Status);
  83
  84       Status = BdsBootLinuxFdt (BootOption->FilePathList,
  85                                 Initrd, // Initrd
  86                                 (CHAR8*)(LinuxArguments + 1),
  87                                 FdtDevicePath);
  88
  89       FreePool (DefaultFdtDevicePath);
  90       FreePool (FdtDevicePath);
  91     }
  92   } else {
  93     // Connect all the drivers if the EFI Application is not a EFI OS Loader
  94     if ((BootOption->Attributes & LOAD_OPTION_CATEGORY_BOOT) == 0) {
  95       BdsConnectAllDrivers ();
  96     }
  97
  98     // Set BootCurrent variable
  99     LoadOptionIndexSize = sizeof(UINT16);
 100     gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,
 101               EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 102               LoadOptionIndexSize, &(BootOption->LoadOptionIndex));
 103
 104     Status = BdsStartEfiApplication (gImageHandle, BootOption->FilePathList, BootOption->OptionalDataSize, BootOption->OptionalData);
 105
 106     // Clear BootCurrent variable
 107     LoadOptionIndexSize = sizeof(UINT16);
 108     gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,
 109               EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 110               0, NULL);
 111   }
 112
 113   return Status;
 114 }
 115
 116 EFI_STATUS
 117 BootOptionList (
 118   IN OUT LIST_ENTRY *BootOptionList
 119   )
 120 {
 121   EFI_STATUS                    Status;
 122   UINTN                         Index;
 123   UINT16*                       BootOrder;
 124   UINTN                         BootOrderSize;
 125   BDS_LOAD_OPTION*              BdsLoadOption;
 126   BDS_LOAD_OPTION_ENTRY*        BdsLoadOptionEntry;
 127
 128   InitializeListHead (BootOptionList);
 129
 130   // Get the Boot Option Order from the environment variable
 131   Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);
 132   if (EFI_ERROR(Status)) {
 133     return Status;
 134   }
 135
 136   for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {
 137     Status = BootOptionFromLoadOptionIndex (BootOrder[Index], &BdsLoadOption);
 138     if (!EFI_ERROR(Status)) {
 139       BdsLoadOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool(sizeof(BDS_LOAD_OPTION_ENTRY));
 140       BdsLoadOptionEntry->BdsLoadOption = BdsLoadOption;
 141       InsertTailList (BootOptionList,&BdsLoadOptionEntry->Link);
 142     }
 143   }
 144
 145   FreePool (BootOrder);
 146
 147   return EFI_SUCCESS;
 148 }
 149
 150 STATIC
 151 EFI_STATUS
 152 BootOptionSetFields (
 153   IN BDS_LOAD_OPTION*           BootOption,
 154   IN UINT32                     Attributes,
 155   IN CHAR16*                    BootDescription,
 156   IN EFI_DEVICE_PATH_PROTOCOL*  DevicePath,
 157   IN ARM_BDS_LOADER_TYPE        BootType,
 158   IN UINT8*                     OptionalData,
 159   IN UINTN                      OptionalDataSize
 160   )
 161 {
 162   EFI_LOAD_OPTION               EfiLoadOption;
 163   UINTN                         EfiLoadOptionSize;
 164   UINTN                         BootDescriptionSize;
 165   UINT16                        FilePathListLength;
 166   UINT8*                        EfiLoadOptionPtr;
 167   UINT8*                        InitrdPathListPtr;
 168   ARM_BDS_LINUX_ARGUMENTS*      DestLinuxArguments;
 169   ARM_BDS_LINUX_ARGUMENTS*      SrcLinuxArguments;
 170   ARM_BDS_LOADER_ARGUMENTS*     BootArguments;
 171
 172   // If we are overwriting an existent Boot Option then we have to free previously allocated memory
 173   if (BootOption->LoadOption) {
 174     FreePool (BootOption->LoadOption);
 175   }
 176
 177   BootDescriptionSize = StrSize (BootDescription);
 178
 179   // Fixup the size in case of entry specific to ArmPlatformPkg/Bds
 180   if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) || (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {
 181     OptionalDataSize += sizeof(ARM_BDS_LOADER_OPTIONAL_DATA_HEADER);
 182   }
 183
 184   // Compute the size of the FilePath list
 185   FilePathListLength = GetUnalignedDevicePathSize (DevicePath);
 186
 187   // Allocate the memory for the EFI Load Option
 188   EfiLoadOptionSize = sizeof(UINT32) + sizeof(UINT16) + BootDescriptionSize + FilePathListLength + OptionalDataSize;
 189   EfiLoadOption = (EFI_LOAD_OPTION)AllocatePool(EfiLoadOptionSize);
 190   EfiLoadOptionPtr = EfiLoadOption;
 191
 192   //
 193   // Populate the EFI Load Option and BDS Boot Option structures
 194   //
 195
 196   // Attributes fields
 197   BootOption->Attributes = Attributes;
 198   *(UINT32*)EfiLoadOptionPtr = Attributes;
 199   EfiLoadOptionPtr += sizeof(UINT32);
 200
 201   // FilePath List fields
 202   BootOption->FilePathListLength = FilePathListLength;
 203   *(UINT16*)EfiLoadOptionPtr = FilePathListLength;
 204   EfiLoadOptionPtr += sizeof(UINT16);
 205
 206   // Boot description fields
 207   BootOption->Description = (CHAR16*)EfiLoadOptionPtr;
 208   CopyMem (EfiLoadOptionPtr, BootDescription, BootDescriptionSize);
 209   EfiLoadOptionPtr += BootDescriptionSize;
 210
 211   // File path fields
 212   BootOption->FilePathList = (EFI_DEVICE_PATH_PROTOCOL*)EfiLoadOptionPtr;
 213   CopyMem (EfiLoadOptionPtr, DevicePath, FilePathListLength);
 214   EfiLoadOptionPtr += FilePathListLength;
 215
 216   // Optional Data fields, Do unaligned writes
 217   BootOption->OptionalData = EfiLoadOptionPtr;
 218
 219   if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) || (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {
 220     // Write the header
 221     WriteUnaligned32 ((UINT32 *)EfiLoadOptionPtr, ARM_BDS_OPTIONAL_DATA_SIGNATURE);
 222     WriteUnaligned32 ((UINT32 *)(EfiLoadOptionPtr + 4), BootType);
 223
 224     BootArguments = (ARM_BDS_LOADER_ARGUMENTS*)OptionalData;
 225     SrcLinuxArguments = &(BootArguments->LinuxArguments);
 226     DestLinuxArguments = &((ARM_BDS_LOADER_OPTIONAL_DATA*)EfiLoadOptionPtr)->Arguments.LinuxArguments;
 227
 228     WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->CmdLineSize), SrcLinuxArguments->CmdLineSize);
 229     WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->InitrdSize), SrcLinuxArguments->InitrdSize);
 230
 231     if (SrcLinuxArguments->CmdLineSize > 0) {
 232       CopyMem ((VOID*)(DestLinuxArguments + 1), (VOID*)(SrcLinuxArguments + 1), SrcLinuxArguments->CmdLineSize);
 233     }
 234
 235     if (SrcLinuxArguments->InitrdSize > 0) {
 236       InitrdPathListPtr = (UINT8*)((UINTN)(DestLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize);
 237       CopyMem (InitrdPathListPtr, (VOID*)((UINTN)(SrcLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize), SrcLinuxArguments->InitrdSize);
 238     }
 239   } else {
 240     CopyMem (BootOption->OptionalData, OptionalData, OptionalDataSize);
 241   }
 242   BootOption->OptionalDataSize = OptionalDataSize;
 243
 244   // If this function is called at the creation of the Boot Device entry (not at the update) the
 245   // BootOption->LoadOptionSize must be zero then we get a new BootIndex for this entry
 246   if (BootOption->LoadOptionSize == 0) {
 247     BootOption->LoadOptionIndex = BootOptionAllocateBootIndex ();
 248   }
 249
 250   // Fill the EFI Load option fields
 251   BootOption->LoadOption = EfiLoadOption;
 252   BootOption->LoadOptionSize = EfiLoadOptionSize;
 253
 254   return EFI_SUCCESS;
 255 }
 256
 257 EFI_STATUS
 258 BootOptionCreate (
 259   IN  UINT32                    Attributes,
 260   IN  CHAR16*                   BootDescription,
 261   IN  EFI_DEVICE_PATH_PROTOCOL* DevicePath,
 262   IN  ARM_BDS_LOADER_TYPE       BootType,
 263   IN  UINT8*                    OptionalData,
 264   IN  UINTN                     OptionalDataSize,
 265   OUT BDS_LOAD_OPTION**         BdsLoadOption
 266   )
 267 {
 268   EFI_STATUS                    Status;
 269   BDS_LOAD_OPTION_ENTRY*        BootOptionEntry;
 270   BDS_LOAD_OPTION*              BootOption;
 271   CHAR16                        BootVariableName[9];
 272   UINT16*                       BootOrder;
 273   UINTN                         BootOrderSize;
 274
 275   //
 276   // Allocate and fill the memory for the BDS Load Option structure
 277   //
 278   BootOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool (sizeof (BDS_LOAD_OPTION_ENTRY));
 279   InitializeListHead (&BootOptionEntry->Link);
 280   BootOptionEntry->BdsLoadOption = (BDS_LOAD_OPTION*)AllocateZeroPool (sizeof(BDS_LOAD_OPTION));
 281
 282   BootOption = BootOptionEntry->BdsLoadOption;
 283   BootOptionSetFields (BootOption, Attributes, BootDescription, DevicePath, BootType, OptionalData, OptionalDataSize);
 284
 285   //
 286   // Set the related environment variables
 287   //
 288
 289   // Create Boot#### environment variable
 290   UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BootOption->LoadOptionIndex);
 291   Status = gRT->SetVariable (
 292       BootVariableName,
 293       &gEfiGlobalVariableGuid,
 294       EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 295       BootOption->LoadOptionSize,
 296       BootOption->LoadOption
 297       );
 298
 299   // Add the new Boot Index to the list
 300   Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);
 301   if (!EFI_ERROR(Status)) {
 302     BootOrder = ReallocatePool (BootOrderSize, BootOrderSize + sizeof(UINT16), BootOrder);
 303     // Add the new index at the end
 304     BootOrder[BootOrderSize / sizeof(UINT16)] = BootOption->LoadOptionIndex;
 305     BootOrderSize += sizeof(UINT16);
 306   } else {
 307     // BootOrder does not exist. Create it
 308     BootOrderSize = sizeof(UINT16);
 309     BootOrder = &(BootOption->LoadOptionIndex);
 310   }
 311
 312   // Update (or Create) the BootOrder environment variable
 313   Status = gRT->SetVariable (
 314       L"BootOrder",
 315       &gEfiGlobalVariableGuid,
 316       EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 317       BootOrderSize,
 318       BootOrder
 319       );
 320
 321   // We only free it if the UEFI Variable 'BootOrder' was already existing
 322   if (BootOrderSize > sizeof(UINT16)) {
 323     FreePool (BootOrder);
 324   }
 325
 326   *BdsLoadOption = BootOption;
 327   return Status;
 328 }
 329
 330 EFI_STATUS
 331 BootOptionUpdate (
 332   IN  BDS_LOAD_OPTION*          BdsLoadOption,
 333   IN  UINT32                    Attributes,
 334   IN  CHAR16*                   BootDescription,
 335   IN  EFI_DEVICE_PATH_PROTOCOL* DevicePath,
 336   IN  ARM_BDS_LOADER_TYPE       BootType,
 337   IN UINT8*                     OptionalData,
 338   IN UINTN                      OptionalDataSize
 339   )
 340 {
 341   EFI_STATUS      Status;
 342   CHAR16          BootVariableName[9];
 343
 344   // Update the BDS Load Option structure
 345   BootOptionSetFields (BdsLoadOption, Attributes, BootDescription, DevicePath, BootType, OptionalData, OptionalDataSize);
 346
 347   // Update the related environment variables
 348   UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BdsLoadOption->LoadOptionIndex);
 349
 350   Status = gRT->SetVariable (
 351       BootVariableName,
 352       &gEfiGlobalVariableGuid,
 353       EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 354       BdsLoadOption->LoadOptionSize,
 355       BdsLoadOption->LoadOption
 356       );
 357
 358   return Status;
 359 }
 360
 361 EFI_STATUS
 362 BootOptionDelete (
 363   IN  BDS_LOAD_OPTION *BootOption
 364   )
 365 {
 366   UINTN         Index;
 367   UINTN         BootOrderSize;
 368   UINT16*       BootOrder;
 369   UINTN         BootOrderCount;
 370   EFI_STATUS    Status;
 371
 372   // Remove the entry from the BootOrder environment variable
 373   Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);
 374   if (!EFI_ERROR(Status)) {
 375     BootOrderCount = BootOrderSize / sizeof(UINT16);
 376
 377     // Find the index of the removed entry
 378     for (Index = 0; Index < BootOrderCount; Index++) {
 379       if (BootOrder[Index] == BootOption->LoadOptionIndex) {
 380         // If it the last entry we do not need to rearrange the BootOrder list
 381         if (Index + 1 != BootOrderCount) {
 382           CopyMem (
 383             &BootOrder[Index],
 384             &BootOrder[Index + 1],
 385             (BootOrderCount - (Index + 1)) * sizeof(UINT16)
 386             );
 387         }
 388         break;
 389       }
 390     }
 391
 392     // Update the BootOrder environment variable
 393     Status = gRT->SetVariable (
 394         L"BootOrder",
 395         &gEfiGlobalVariableGuid,
 396         EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 397         BootOrderSize - sizeof(UINT16),
 398         BootOrder
 399         );
 400   }
 401
 402   FreePool (BootOrder);
 403
 404   return EFI_SUCCESS;
 405 }