IntelFrameworkModulePkg/Universal/BdsDxe/BdsEntry.c

   1 /** @file
   2   This module produce main entry for BDS phase - BdsEntry.
   3   When this module was dispatched by DxeCore, gEfiBdsArchProtocolGuid will be installed
   4   which contains interface of BdsEntry.
   5   After DxeCore finish DXE phase, gEfiBdsArchProtocolGuid->BdsEntry will be invoked
   6   to enter BDS phase.
   7
   8 Copyright (c) 2004 - 2012, Intel Corporation. All rights reserved.<BR>
   9 This program and the accompanying materials
  10 are licensed and made available under the terms and conditions of the BSD License
  11 which accompanies this distribution.  The full text of the license may be found at
  12 http://opensource.org/licenses/bsd-license.php
  13
  14 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16
  17 **/
  18
  19 #include "Bds.h"
  20 #include "Language.h"
  21 #include "FrontPage.h"
  22 #include "Hotkey.h"
  23 #include "HwErrRecSupport.h"
  24
  25 ///
  26 /// BDS arch protocol instance initial value.
  27 ///
  28 /// Note: Current BDS not directly get the BootMode, DefaultBoot,
  29 /// TimeoutDefault, MemoryTestLevel value from the BDS arch protocol.
  30 /// Please refer to the library useage of BdsLibGetBootMode, BdsLibGetTimeout
  31 /// and PlatformBdsDiagnostics in BdsPlatform.c
  32 ///
  33 EFI_HANDLE  gBdsHandle = NULL;
  34
  35 EFI_BDS_ARCH_PROTOCOL  gBds = {
  36   BdsEntry
  37 };
  38
  39 UINT16                          *mBootNext = NULL;
  40
  41 /**
  42
  43   Install Boot Device Selection Protocol
  44
  45   @param ImageHandle     The image handle.
  46   @param SystemTable     The system table.
  47
  48   @retval  EFI_SUCEESS  BDS has finished initializing.
  49                         Return the dispatcher and recall BDS.Entry
  50   @retval  Other        Return status from AllocatePool() or gBS->InstallProtocolInterface
  51
  52 **/
  53 EFI_STATUS
  54 EFIAPI
  55 BdsInitialize (
  56   IN EFI_HANDLE                            ImageHandle,
  57   IN EFI_SYSTEM_TABLE                      *SystemTable
  58   )
  59 {
  60   EFI_STATUS  Status;
  61
  62   //
  63   // Install protocol interface
  64   //
  65   Status = gBS->InstallMultipleProtocolInterfaces (
  66                   &gBdsHandle,
  67                   &gEfiBdsArchProtocolGuid, &gBds,
  68                   NULL
  69                   );
  70   ASSERT_EFI_ERROR (Status);
  71
  72   return Status;
  73 }
  74
  75 /**
  76
  77   This function attempts to boot for the boot order specified
  78   by platform policy.
  79
  80 **/
  81 VOID
  82 BdsBootDeviceSelect (
  83   VOID
  84   )
  85 {
  86   EFI_STATUS        Status;
  87   LIST_ENTRY        *Link;
  88   BDS_COMMON_OPTION *BootOption;
  89   UINTN             ExitDataSize;
  90   CHAR16            *ExitData;
  91   UINT16            Timeout;
  92   LIST_ENTRY        BootLists;
  93   CHAR16            Buffer[20];
  94   BOOLEAN           BootNextExist;
  95   LIST_ENTRY        *LinkBootNext;
  96
  97   //
  98   // Got the latest boot option
  99   //
 100   BootNextExist = FALSE;
 101   LinkBootNext  = NULL;
 102   InitializeListHead (&BootLists);
 103
 104   //
 105   // First check the boot next option
 106   //
 107   ZeroMem (Buffer, sizeof (Buffer));
 108
 109   if (mBootNext != NULL) {
 110     //
 111     // Indicate we have the boot next variable, so this time
 112     // boot will always have this boot option
 113     //
 114     BootNextExist = TRUE;
 115
 116     //
 117     // Clear the this variable so it's only exist in this time boot
 118     //
 119     gRT->SetVariable (
 120           L"BootNext",
 121           &gEfiGlobalVariableGuid,
 122           EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
 123           0,
 124           mBootNext
 125           );
 126
 127     //
 128     // Add the boot next boot option
 129     //
 130     UnicodeSPrint (Buffer, sizeof (Buffer), L"Boot%04x", *mBootNext);
 131     BootOption = BdsLibVariableToOption (&BootLists, Buffer);
 132
 133     //
 134     // If fail to get boot option from variable, just return and do nothing.
 135     //
 136     if (BootOption == NULL) {
 137       return;
 138     }
 139
 140     BootOption->BootCurrent = *mBootNext;
 141   }
 142   //
 143   // Parse the boot order to get boot option
 144   //
 145   BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
 146
 147   //
 148   // When we didn't have chance to build boot option variables in the first
 149   // full configuration boot (e.g.: Reset in the first page or in Device Manager),
 150   // we have no boot options in the following mini configuration boot.
 151   // Give the last chance to enumerate the boot options.
 152   //
 153   if (IsListEmpty (&BootLists)) {
 154     BdsLibEnumerateAllBootOption (&BootLists);
 155   }
 156
 157   Link = BootLists.ForwardLink;
 158
 159   //
 160   // Parameter check, make sure the loop will be valid
 161   //
 162   if (Link == NULL) {
 163     return ;
 164   }
 165   //
 166   // Here we make the boot in a loop, every boot success will
 167   // return to the front page
 168   //
 169   for (;;) {
 170     //
 171     // Check the boot option list first
 172     //
 173     if (Link == &BootLists) {
 174       //
 175       // There are two ways to enter here:
 176       // 1. There is no active boot option, give user chance to
 177       //    add new boot option
 178       // 2. All the active boot option processed, and there is no
 179       //    one is success to boot, then we back here to allow user
 180       //    add new active boot option
 181       //
 182       Timeout = 0xffff;
 183       PlatformBdsEnterFrontPage (Timeout, FALSE);
 184       InitializeListHead (&BootLists);
 185       BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
 186       Link = BootLists.ForwardLink;
 187       continue;
 188     }
 189     //
 190     // Get the boot option from the link list
 191     //
 192     BootOption = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
 193
 194     //
 195     // According to EFI Specification, if a load option is not marked
 196     // as LOAD_OPTION_ACTIVE, the boot manager will not automatically
 197     // load the option.
 198     //
 199     if (!IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE)) {
 200       //
 201       // skip the header of the link list, because it has no boot option
 202       //
 203       Link = Link->ForwardLink;
 204       continue;
 205     }
 206     //
 207     // Make sure the boot option device path connected,
 208     // but ignore the BBS device path
 209     //
 210     if (DevicePathType (BootOption->DevicePath) != BBS_DEVICE_PATH) {
 211       //
 212       // Notes: the internal shell can not been connected with device path
 213       // so we do not check the status here
 214       //
 215       BdsLibConnectDevicePath (BootOption->DevicePath);
 216     }
 217
 218     //
 219     // Restore to original mode before launching boot option.
 220     //
 221     BdsSetConsoleMode (FALSE);
 222
 223     //
 224     // All the driver options should have been processed since
 225     // now boot will be performed.
 226     //
 227     Status = BdsLibBootViaBootOption (BootOption, BootOption->DevicePath, &ExitDataSize, &ExitData);
 228     if (Status != EFI_SUCCESS) {
 229       //
 230       // Call platform action to indicate the boot fail
 231       //
 232       BootOption->StatusString = GetStringById (STRING_TOKEN (STR_BOOT_FAILED));
 233       PlatformBdsBootFail (BootOption, Status, ExitData, ExitDataSize);
 234
 235       //
 236       // Check the next boot option
 237       //
 238       Link = Link->ForwardLink;
 239
 240     } else {
 241       //
 242       // Call platform action to indicate the boot success
 243       //
 244       BootOption->StatusString = GetStringById (STRING_TOKEN (STR_BOOT_SUCCEEDED));
 245       PlatformBdsBootSuccess (BootOption);
 246
 247       //
 248       // Boot success, then stop process the boot order, and
 249       // present the boot manager menu, front page
 250       //
 251       Timeout = 0xffff;
 252       PlatformBdsEnterFrontPage (Timeout, FALSE);
 253
 254       //
 255       // Rescan the boot option list, avoid potential risk of the boot
 256       // option change in front page
 257       //
 258       if (BootNextExist) {
 259         LinkBootNext = BootLists.ForwardLink;
 260       }
 261
 262       InitializeListHead (&BootLists);
 263       if (LinkBootNext != NULL) {
 264         //
 265         // Reserve the boot next option
 266         //
 267         InsertTailList (&BootLists, LinkBootNext);
 268       }
 269
 270       BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
 271       Link = BootLists.ForwardLink;
 272     }
 273   }
 274
 275 }
 276
 277 /**
 278   Validate the device path instance.
 279
 280   Only base on the length filed in the device path node to validate the device path.
 281
 282   @param  DevicePath         A pointer to a device path data structure.
 283   @param  MaxSize            Max valid device path size. If big than this size,
 284                              return error.
 285
 286   @retval TRUE               An valid device path.
 287   @retval FALSE              An invalid device path.
 288
 289 **/
 290 BOOLEAN
 291 IsValidDevicePath (
 292   IN EFI_DEVICE_PATH_PROTOCOL  *DevicePath,
 293   IN UINTN                     MaxSize
 294   )
 295 {
 296   UINTN  Size;
 297   UINTN  NodeSize;
 298
 299   if (DevicePath == NULL) {
 300     return TRUE;
 301   }
 302
 303   Size = 0;
 304
 305   while (!IsDevicePathEnd (DevicePath)) {
 306     NodeSize = DevicePathNodeLength (DevicePath);
 307     if (NodeSize < END_DEVICE_PATH_LENGTH) {
 308       return FALSE;
 309     }
 310
 311     Size += NodeSize;
 312     if (Size > MaxSize) {
 313       return FALSE;
 314     }
 315
 316     DevicePath = NextDevicePathNode (DevicePath);
 317   }
 318
 319   Size += DevicePathNodeLength (DevicePath);
 320   if (Size > MaxSize) {
 321     return FALSE;
 322   }
 323
 324   return TRUE;
 325 }
 326
 327 /**
 328
 329   Validate input console variable data.
 330
 331   If found the device path is not a valid device path, remove the variable.
 332
 333   @param VariableName             Input console variable name.
 334
 335 **/
 336
 337 VOID
 338 BdsFormalizeConsoleVariable (
 339   IN  CHAR16          *VariableName
 340   )
 341 {
 342   EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
 343   UINTN                     VariableSize;
 344   EFI_STATUS                Status;
 345
 346   DevicePath = BdsLibGetVariableAndSize (
 347                       VariableName,
 348                       &gEfiGlobalVariableGuid,
 349                       &VariableSize
 350                       );
 351   if (!IsValidDevicePath (DevicePath, VariableSize)) {
 352     Status = gRT->SetVariable (
 353                     VariableName,
 354                     &gEfiGlobalVariableGuid,
 355                     EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
 356                     0,
 357                     NULL
 358                     );
 359     ASSERT_EFI_ERROR (Status);
 360   }
 361 }
 362
 363 /**
 364
 365   Validate variables.
 366
 367   If found the device path is not a valid device path, remove the variable.
 368
 369 **/
 370 VOID
 371 BdsFormalizeEfiGlobalVariable (
 372   VOID
 373   )
 374 {
 375   //
 376   // Validate Console variable.
 377   //
 378   BdsFormalizeConsoleVariable (L"ConIn");
 379   BdsFormalizeConsoleVariable (L"ConOut");
 380   BdsFormalizeConsoleVariable (L"ErrOut");
 381 }
 382
 383 /**
 384
 385   Service routine for BdsInstance->Entry(). Devices are connected, the
 386   consoles are initialized, and the boot options are tried.
 387
 388   @param This             Protocol Instance structure.
 389
 390 **/
 391 VOID
 392 EFIAPI
 393 BdsEntry (
 394   IN EFI_BDS_ARCH_PROTOCOL  *This
 395   )
 396 {
 397   LIST_ENTRY                      DriverOptionList;
 398   LIST_ENTRY                      BootOptionList;
 399   UINTN                           BootNextSize;
 400   CHAR16                          *FirmwareVendor;
 401
 402   //
 403   // Insert the performance probe
 404   //
 405   PERF_END (NULL, "DXE", NULL, 0);
 406   PERF_START (NULL, "BDS", NULL, 0);
 407
 408   //
 409   // Initialize the global system boot option and driver option
 410   //
 411   InitializeListHead (&DriverOptionList);
 412   InitializeListHead (&BootOptionList);
 413
 414   //
 415   // Initialize hotkey service
 416   //
 417   InitializeHotkeyService ();
 418
 419   //
 420   // Fill in FirmwareVendor and FirmwareRevision from PCDs
 421   //
 422   FirmwareVendor = (CHAR16 *)PcdGetPtr (PcdFirmwareVendor);
 423   gST->FirmwareVendor = AllocateRuntimeCopyPool (StrSize (FirmwareVendor), FirmwareVendor);
 424   ASSERT (gST->FirmwareVendor != NULL);
 425   gST->FirmwareRevision = PcdGet32 (PcdFirmwareRevision);
 426
 427   //
 428   // Fixup Tasble CRC after we updated Firmware Vendor and Revision
 429   //
 430   gBS->CalculateCrc32 ((VOID *)gST, sizeof(EFI_SYSTEM_TABLE), &gST->Hdr.CRC32);
 431
 432   //
 433   // Validate Variable.
 434   //
 435   BdsFormalizeEfiGlobalVariable();
 436
 437   //
 438   // Do the platform init, can be customized by OEM/IBV
 439   //
 440   PERF_START (NULL, "PlatformBds", "BDS", 0);
 441   PlatformBdsInit ();
 442
 443   InitializeHwErrRecSupport();
 444
 445   //
 446   // bugbug: platform specific code
 447   // Initialize the platform specific string and language
 448   //
 449   InitializeStringSupport ();
 450   InitializeLanguage (TRUE);
 451   InitializeFrontPage (TRUE);
 452
 453   //
 454   // Set up the device list based on EFI 1.1 variables
 455   // process Driver#### and Load the driver's in the
 456   // driver option list
 457   //
 458   BdsLibBuildOptionFromVar (&DriverOptionList, L"DriverOrder");
 459   if (!IsListEmpty (&DriverOptionList)) {
 460     BdsLibLoadDrivers (&DriverOptionList);
 461   }
 462   //
 463   // Check if we have the boot next option
 464   //
 465   mBootNext = BdsLibGetVariableAndSize (
 466                 L"BootNext",
 467                 &gEfiGlobalVariableGuid,
 468                 &BootNextSize
 469                 );
 470
 471   //
 472   // Setup some platform policy here
 473   //
 474   PlatformBdsPolicyBehavior (&DriverOptionList, &BootOptionList, BdsProcessCapsules, BdsMemoryTest);
 475   PERF_END (NULL, "PlatformBds", "BDS", 0);
 476
 477   //
 478   // BDS select the boot device to load OS
 479   //
 480   BdsBootDeviceSelect ();
 481
 482   //
 483   // Only assert here since this is the right behavior, we should never
 484   // return back to DxeCore.
 485   //
 486   ASSERT (FALSE);
 487
 488   return ;
 489 }