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ArmPlatformPkg/Bds: Early Console Initialization
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1/** @file\r
2*\r
3* Copyright (c) 2011-2015, ARM Limited. All rights reserved.\r
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
15#include "BdsInternal.h"\r
16\r
17#include <Library/PcdLib.h>\r
18#include <Library/PerformanceLib.h>\r
19\r
20#include <Protocol/Bds.h>\r
21\r
22#include <Guid/EventGroup.h>\r
23\r
24#define EFI_SET_TIMER_TO_SECOND 10000000\r
25\r
26STATIC\r
27EFI_STATUS\r
28GetConsoleDevicePathFromVariable (\r
29 IN CHAR16* ConsoleVarName,\r
30 IN CHAR16* DefaultConsolePaths,\r
31 OUT EFI_DEVICE_PATH** DevicePaths\r
32 )\r
33{\r
34 EFI_STATUS Status;\r
35 UINTN Size;\r
36 EFI_DEVICE_PATH_PROTOCOL* DevicePathInstances;\r
37 EFI_DEVICE_PATH_PROTOCOL* DevicePathInstance;\r
38 CHAR16* DevicePathStr;\r
39 CHAR16* NextDevicePathStr;\r
40 EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *EfiDevicePathFromTextProtocol;\r
41\r
42 Status = GetGlobalEnvironmentVariable (ConsoleVarName, NULL, NULL, (VOID**)&DevicePathInstances);\r
43 if (EFI_ERROR(Status)) {\r
44 // In case no default console device path has been defined we assume a driver handles the console (eg: SimpleTextInOutSerial)\r
45 if ((DefaultConsolePaths == NULL) || (DefaultConsolePaths[0] == L'\0')) {\r
46 *DevicePaths = NULL;\r
47 return EFI_SUCCESS;\r
48 }\r
49\r
50 Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);\r
51 ASSERT_EFI_ERROR(Status);\r
52\r
53 DevicePathInstances = NULL;\r
54\r
55 // Extract the Device Path instances from the multi-device path string\r
56 while ((DefaultConsolePaths != NULL) && (DefaultConsolePaths[0] != L'\0')) {\r
57 NextDevicePathStr = StrStr (DefaultConsolePaths, L";");\r
58 if (NextDevicePathStr == NULL) {\r
59 DevicePathStr = DefaultConsolePaths;\r
60 DefaultConsolePaths = NULL;\r
61 } else {\r
62 DevicePathStr = (CHAR16*)AllocateCopyPool ((NextDevicePathStr - DefaultConsolePaths + 1) * sizeof(CHAR16), DefaultConsolePaths);\r
63 *(DevicePathStr + (NextDevicePathStr - DefaultConsolePaths)) = L'\0';\r
64 DefaultConsolePaths = NextDevicePathStr;\r
65 if (DefaultConsolePaths[0] == L';') {\r
66 DefaultConsolePaths++;\r
67 }\r
68 }\r
69\r
70 DevicePathInstance = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath (DevicePathStr);\r
71 ASSERT(DevicePathInstance != NULL);\r
72 DevicePathInstances = AppendDevicePathInstance (DevicePathInstances, DevicePathInstance);\r
73\r
74 if (NextDevicePathStr != NULL) {\r
75 FreePool (DevicePathStr);\r
76 }\r
77 FreePool (DevicePathInstance);\r
78 }\r
79\r
80 // Set the environment variable with this device path multi-instances\r
81 Size = GetDevicePathSize (DevicePathInstances);\r
82 if (Size > 0) {\r
83 gRT->SetVariable (\r
84 ConsoleVarName,\r
85 &gEfiGlobalVariableGuid,\r
86 EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
87 Size,\r
88 DevicePathInstances\r
89 );\r
90 } else {\r
91 Status = EFI_INVALID_PARAMETER;\r
92 }\r
93 }\r
94\r
95 if (!EFI_ERROR(Status)) {\r
96 *DevicePaths = DevicePathInstances;\r
97 }\r
98 return Status;\r
99}\r
100\r
101STATIC\r
102EFI_STATUS\r
103InitializeConsolePipe (\r
104 IN EFI_DEVICE_PATH *ConsoleDevicePaths,\r
105 IN EFI_GUID *Protocol,\r
106 OUT EFI_HANDLE *Handle,\r
107 OUT VOID* *Interface\r
108 )\r
109{\r
110 EFI_STATUS Status;\r
111 UINTN Size;\r
112 UINTN NoHandles;\r
113 EFI_HANDLE *Buffer;\r
114 EFI_DEVICE_PATH_PROTOCOL* DevicePath;\r
115\r
116 // Connect all the Device Path Consoles\r
117 while (ConsoleDevicePaths != NULL) {\r
118 DevicePath = GetNextDevicePathInstance (&ConsoleDevicePaths, &Size);\r
119\r
120 Status = BdsConnectDevicePath (DevicePath, Handle, NULL);\r
121 DEBUG_CODE_BEGIN();\r
122 if (EFI_ERROR(Status)) {\r
123 // We convert back to the text representation of the device Path\r
124 EFI_DEVICE_PATH_TO_TEXT_PROTOCOL* DevicePathToTextProtocol;\r
125 CHAR16* DevicePathTxt;\r
126 EFI_STATUS Status;\r
127\r
128 Status = gBS->LocateProtocol(&gEfiDevicePathToTextProtocolGuid, NULL, (VOID **)&DevicePathToTextProtocol);\r
129 if (!EFI_ERROR(Status)) {\r
130 DevicePathTxt = DevicePathToTextProtocol->ConvertDevicePathToText (DevicePath, TRUE, TRUE);\r
131\r
132 DEBUG((EFI_D_ERROR,"Fail to start the console with the Device Path '%s'. (Error '%r')\n", DevicePathTxt, Status));\r
133\r
134 FreePool (DevicePathTxt);\r
135 }\r
136 }\r
137 DEBUG_CODE_END();\r
138\r
139 // If the console splitter driver is not supported by the platform then use the first Device Path\r
140 // instance for the console interface.\r
141 if (!EFI_ERROR(Status) && (*Interface == NULL)) {\r
142 Status = gBS->HandleProtocol (*Handle, Protocol, Interface);\r
143 }\r
144 }\r
145\r
146 // No Device Path has been defined for this console interface. We take the first protocol implementation\r
147 if (*Interface == NULL) {\r
148 Status = gBS->LocateHandleBuffer (ByProtocol, Protocol, NULL, &NoHandles, &Buffer);\r
149 if (EFI_ERROR (Status)) {\r
150 BdsConnectAllDrivers();\r
151 Status = gBS->LocateHandleBuffer (ByProtocol, Protocol, NULL, &NoHandles, &Buffer);\r
152 }\r
153\r
154 if (!EFI_ERROR(Status)) {\r
155 *Handle = Buffer[0];\r
156 Status = gBS->HandleProtocol (*Handle, Protocol, Interface);\r
157 ASSERT_EFI_ERROR(Status);\r
158 FreePool (Buffer);\r
159 }\r
160 } else {\r
161 Status = EFI_SUCCESS;\r
162 }\r
163\r
164 return Status;\r
165}\r
166\r
167EFI_STATUS\r
168InitializeConsole (\r
169 VOID\r
170 )\r
171{\r
172 EFI_STATUS Status;\r
173 EFI_DEVICE_PATH* ConOutDevicePaths;\r
174 EFI_DEVICE_PATH* ConInDevicePaths;\r
175 EFI_DEVICE_PATH* ConErrDevicePaths;\r
176\r
177 // By getting the Console Device Paths from the environment variables before initializing the console pipe, we\r
178 // create the 3 environment variables (ConIn, ConOut, ConErr) that allows to initialize all the console interface\r
179 // of newly installed console drivers\r
180 Status = GetConsoleDevicePathFromVariable (L"ConOut", (CHAR16*)PcdGetPtr(PcdDefaultConOutPaths), &ConOutDevicePaths);\r
181 ASSERT_EFI_ERROR (Status);\r
182 Status = GetConsoleDevicePathFromVariable (L"ConIn", (CHAR16*)PcdGetPtr(PcdDefaultConInPaths), &ConInDevicePaths);\r
183 ASSERT_EFI_ERROR (Status);\r
184 Status = GetConsoleDevicePathFromVariable (L"ErrOut", (CHAR16*)PcdGetPtr(PcdDefaultConOutPaths), &ConErrDevicePaths);\r
185 ASSERT_EFI_ERROR (Status);\r
186\r
187 // Initialize the Consoles\r
188 Status = InitializeConsolePipe (ConOutDevicePaths, &gEfiSimpleTextOutProtocolGuid, &gST->ConsoleOutHandle, (VOID **)&gST->ConOut);\r
189 ASSERT_EFI_ERROR (Status);\r
190 Status = InitializeConsolePipe (ConInDevicePaths, &gEfiSimpleTextInProtocolGuid, &gST->ConsoleInHandle, (VOID **)&gST->ConIn);\r
191 ASSERT_EFI_ERROR (Status);\r
192 Status = InitializeConsolePipe (ConErrDevicePaths, &gEfiSimpleTextOutProtocolGuid, &gST->StandardErrorHandle, (VOID **)&gST->StdErr);\r
193 if (EFI_ERROR(Status)) {\r
194 // In case of error, we reuse the console output for the error output\r
195 gST->StandardErrorHandle = gST->ConsoleOutHandle;\r
196 gST->StdErr = gST->ConOut;\r
197 }\r
198\r
199 // Free Memory allocated for reading the UEFI Variables\r
200 if (ConOutDevicePaths) {\r
201 FreePool (ConOutDevicePaths);\r
202 }\r
203 if (ConInDevicePaths) {\r
204 FreePool (ConInDevicePaths);\r
205 }\r
206 if (ConErrDevicePaths) {\r
207 FreePool (ConErrDevicePaths);\r
208 }\r
209\r
210 return EFI_SUCCESS;\r
211}\r
212\r
213EFI_STATUS\r
214DefineDefaultBootEntries (\r
215 VOID\r
216 )\r
217{\r
218 BDS_LOAD_OPTION* BdsLoadOption;\r
219 UINTN Size;\r
220 EFI_STATUS Status;\r
221 EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL* EfiDevicePathFromTextProtocol;\r
222 EFI_DEVICE_PATH* BootDevicePath;\r
223 UINTN CmdLineSize;\r
224 UINTN CmdLineAsciiSize;\r
225 CHAR16* DefaultBootArgument;\r
226 CHAR8* AsciiDefaultBootArgument;\r
227\r
228 //\r
229 // If Boot Order does not exist then create a default entry\r
230 //\r
231 Size = 0;\r
232 Status = gRT->GetVariable (L"BootOrder", &gEfiGlobalVariableGuid, NULL, &Size, NULL);\r
233 if (Status == EFI_NOT_FOUND) {\r
234 if ((PcdGetPtr(PcdDefaultBootDevicePath) == NULL) || (StrLen ((CHAR16*)PcdGetPtr(PcdDefaultBootDevicePath)) == 0)) {\r
235 return EFI_UNSUPPORTED;\r
236 }\r
237\r
238 Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);\r
239 if (EFI_ERROR(Status)) {\r
240 // You must provide an implementation of DevicePathFromTextProtocol in your firmware (eg: DevicePathDxe)\r
241 DEBUG((EFI_D_ERROR,"Error: Bds requires DevicePathFromTextProtocol\n"));\r
242 return Status;\r
243 }\r
244 BootDevicePath = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath ((CHAR16*)PcdGetPtr(PcdDefaultBootDevicePath));\r
245\r
246 DEBUG_CODE_BEGIN();\r
247 // We convert back to the text representation of the device Path to see if the initial text is correct\r
248 EFI_DEVICE_PATH_TO_TEXT_PROTOCOL* DevicePathToTextProtocol;\r
249 CHAR16* DevicePathTxt;\r
250\r
251 Status = gBS->LocateProtocol(&gEfiDevicePathToTextProtocolGuid, NULL, (VOID **)&DevicePathToTextProtocol);\r
252 ASSERT_EFI_ERROR(Status);\r
253 DevicePathTxt = DevicePathToTextProtocol->ConvertDevicePathToText (BootDevicePath, TRUE, TRUE);\r
254\r
255 if (StrCmp ((CHAR16*)PcdGetPtr (PcdDefaultBootDevicePath), DevicePathTxt) != 0) {\r
256 DEBUG ((EFI_D_ERROR, "Device Path given: '%s' Device Path expected: '%s'\n",\r
257 (CHAR16*)PcdGetPtr (PcdDefaultBootDevicePath), DevicePathTxt));\r
258 ASSERT_EFI_ERROR (EFI_INVALID_PARAMETER);\r
259 }\r
260\r
261 FreePool (DevicePathTxt);\r
262 DEBUG_CODE_END();\r
263\r
264 // Create the entry is the Default values are correct\r
265 if (BootDevicePath != NULL) {\r
266 // We do not support NULL pointer\r
267 ASSERT (PcdGetPtr (PcdDefaultBootArgument) != NULL);\r
268\r
269 //\r
270 // Logic to handle ASCII or Unicode default parameters\r
271 //\r
272 if (*(CHAR8*)PcdGetPtr (PcdDefaultBootArgument) == '\0') {\r
273 CmdLineSize = 0;\r
274 CmdLineAsciiSize = 0;\r
275 DefaultBootArgument = NULL;\r
276 AsciiDefaultBootArgument = NULL;\r
277 } else if (IsUnicodeString ((CHAR16*)PcdGetPtr (PcdDefaultBootArgument))) {\r
278 // The command line is a Unicode string\r
279 DefaultBootArgument = (CHAR16*)PcdGetPtr (PcdDefaultBootArgument);\r
280 CmdLineSize = StrSize (DefaultBootArgument);\r
281\r
282 // Initialize ASCII variables\r
283 CmdLineAsciiSize = CmdLineSize / 2;\r
284 AsciiDefaultBootArgument = AllocatePool (CmdLineAsciiSize);\r
285 if (AsciiDefaultBootArgument == NULL) {\r
286 return EFI_OUT_OF_RESOURCES;\r
287 }\r
288 UnicodeStrToAsciiStr ((CHAR16*)PcdGetPtr (PcdDefaultBootArgument), AsciiDefaultBootArgument);\r
289 } else {\r
290 // The command line is a ASCII string\r
291 AsciiDefaultBootArgument = (CHAR8*)PcdGetPtr (PcdDefaultBootArgument);\r
292 CmdLineAsciiSize = AsciiStrSize (AsciiDefaultBootArgument);\r
293\r
294 // Initialize ASCII variables\r
295 CmdLineSize = CmdLineAsciiSize * 2;\r
296 DefaultBootArgument = AllocatePool (CmdLineSize);\r
297 if (DefaultBootArgument == NULL) {\r
298 return EFI_OUT_OF_RESOURCES;\r
299 }\r
300 AsciiStrToUnicodeStr (AsciiDefaultBootArgument, DefaultBootArgument);\r
301 }\r
302\r
303 BootOptionCreate (LOAD_OPTION_ACTIVE | LOAD_OPTION_CATEGORY_BOOT,\r
304 (CHAR16*)PcdGetPtr (PcdDefaultBootDescription),\r
305 BootDevicePath,\r
306 (UINT8 *)DefaultBootArgument, // OptionalData\r
307 CmdLineSize, // OptionalDataSize\r
308 &BdsLoadOption\r
309 );\r
310 FreePool (BdsLoadOption);\r
311\r
312 if (DefaultBootArgument == (CHAR16*)PcdGetPtr (PcdDefaultBootArgument)) {\r
313 FreePool (AsciiDefaultBootArgument);\r
314 } else if (DefaultBootArgument != NULL) {\r
315 FreePool (DefaultBootArgument);\r
316 }\r
317 } else {\r
318 Status = EFI_UNSUPPORTED;\r
319 }\r
320 }\r
321\r
322 return Status;\r
323}\r
324\r
325EFI_STATUS\r
326StartDefaultBootOnTimeout (\r
327 VOID\r
328 )\r
329{\r
330 UINTN Size;\r
331 UINT16 Timeout;\r
332 UINT16 *TimeoutPtr;\r
333 EFI_EVENT WaitList[2];\r
334 UINTN WaitIndex;\r
335 UINT16 *BootOrder;\r
336 UINTN BootOrderSize;\r
337 UINTN Index;\r
338 CHAR16 BootVariableName[9];\r
339 EFI_STATUS Status;\r
340 EFI_INPUT_KEY Key;\r
341\r
342 Size = sizeof(UINT16);\r
343 Timeout = (UINT16)PcdGet16 (PcdPlatformBootTimeOut);\r
344 Status = GetGlobalEnvironmentVariable (L"Timeout", &Timeout, &Size, (VOID**)&TimeoutPtr);\r
345 if (!EFI_ERROR (Status)) {\r
346 Timeout = *TimeoutPtr;\r
347 FreePool (TimeoutPtr);\r
348 }\r
349\r
350 if (Timeout != 0xFFFF) {\r
351 if (Timeout > 0) {\r
352 // Create the waiting events (keystroke and 1sec timer)\r
353 gBS->CreateEvent (EVT_TIMER, 0, NULL, NULL, &WaitList[0]);\r
354 gBS->SetTimer (WaitList[0], TimerPeriodic, EFI_SET_TIMER_TO_SECOND);\r
355 WaitList[1] = gST->ConIn->WaitForKey;\r
356\r
357 // Start the timer\r
358 WaitIndex = 0;\r
359 Print(L"The default boot selection will start in ");\r
360 while ((Timeout > 0) && (WaitIndex == 0)) {\r
361 Print(L"%3d seconds",Timeout);\r
362 gBS->WaitForEvent (2, WaitList, &WaitIndex);\r
363 if (WaitIndex == 0) {\r
364 Print(L"\b\b\b\b\b\b\b\b\b\b\b");\r
365 Timeout--;\r
366 }\r
367 }\r
368 // Discard key in the buffer\r
369 do {\r
370 Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);\r
371 } while(!EFI_ERROR(Status));\r
372 gBS->CloseEvent (WaitList[0]);\r
373 Print(L"\n\r");\r
374 }\r
375\r
376 // In case of Timeout we start the default boot selection\r
377 if (Timeout == 0) {\r
378 // Get the Boot Option Order from the environment variable (a default value should have been created)\r
379 GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);\r
380\r
381 for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {\r
382 UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BootOrder[Index]);\r
383 Status = BdsStartBootOption (BootVariableName);\r
384 if(!EFI_ERROR(Status)){\r
385 // Boot option returned successfully, hence don't need to start next boot option\r
386 break;\r
387 }\r
388 // In case of success, we should not return from this call.\r
389 }\r
390 FreePool (BootOrder);\r
391 }\r
392 }\r
393 return EFI_SUCCESS;\r
394}\r
395\r
396/**\r
397 An empty function to pass error checking of CreateEventEx ().\r
398\r
399 @param Event Event whose notification function is being invoked.\r
400 @param Context Pointer to the notification function's context,\r
401 which is implementation-dependent.\r
402\r
403**/\r
404VOID\r
405EFIAPI\r
406EmptyCallbackFunction (\r
407 IN EFI_EVENT Event,\r
408 IN VOID *Context\r
409 )\r
410{\r
411 return;\r
412}\r
413\r
414/**\r
415 This function uses policy data from the platform to determine what operating\r
416 system or system utility should be loaded and invoked. This function call\r
417 also optionally make the use of user input to determine the operating system\r
418 or system utility to be loaded and invoked. When the DXE Core has dispatched\r
419 all the drivers on the dispatch queue, this function is called. This\r
420 function will attempt to connect the boot devices required to load and invoke\r
421 the selected operating system or system utility. During this process,\r
422 additional firmware volumes may be discovered that may contain addition DXE\r
423 drivers that can be dispatched by the DXE Core. If a boot device cannot be\r
424 fully connected, this function calls the DXE Service Dispatch() to allow the\r
425 DXE drivers from any newly discovered firmware volumes to be dispatched.\r
426 Then the boot device connection can be attempted again. If the same boot\r
427 device connection operation fails twice in a row, then that boot device has\r
428 failed, and should be skipped. This function should never return.\r
429\r
430 @param This The EFI_BDS_ARCH_PROTOCOL instance.\r
431\r
432 @return None.\r
433\r
434**/\r
435VOID\r
436EFIAPI\r
437BdsEntry (\r
438 IN EFI_BDS_ARCH_PROTOCOL *This\r
439 )\r
440{\r
441 UINTN Size;\r
442 EFI_STATUS Status;\r
443 UINT16 *BootNext;\r
444 UINTN BootNextSize;\r
445 CHAR16 BootVariableName[9];\r
446 EFI_EVENT EndOfDxeEvent;\r
447\r
448 //\r
449 // Signal EndOfDxe PI Event\r
450 //\r
451 Status = gBS->CreateEventEx (\r
452 EVT_NOTIFY_SIGNAL,\r
453 TPL_NOTIFY,\r
454 EmptyCallbackFunction,\r
455 NULL,\r
456 &gEfiEndOfDxeEventGroupGuid,\r
457 &EndOfDxeEvent\r
458 );\r
459 if (!EFI_ERROR (Status)) {\r
460 gBS->SignalEvent (EndOfDxeEvent);\r
461 }\r
462\r
463 PERF_END (NULL, "DXE", NULL, 0);\r
464\r
465 //\r
466 // Declare the Firmware Vendor\r
467 //\r
468 if (FixedPcdGetPtr(PcdFirmwareVendor) != NULL) {\r
469 Size = 0x100;\r
470 gST->FirmwareVendor = AllocateRuntimePool (Size);\r
471 ASSERT (gST->FirmwareVendor != NULL);\r
472 UnicodeSPrint (gST->FirmwareVendor, Size, L"%a EFI %a %a", PcdGetPtr(PcdFirmwareVendor), __DATE__, __TIME__);\r
473 }\r
474\r
475 //\r
476 // Fixup Table CRC after we updated Firmware Vendor\r
477 //\r
478 gST->Hdr.CRC32 = 0;\r
479 Status = gBS->CalculateCrc32 ((VOID*)gST, gST->Hdr.HeaderSize, &gST->Hdr.CRC32);\r
480 ASSERT_EFI_ERROR (Status);\r
481\r
482 // Now we need to setup the EFI System Table with information about the console devices.\r
483 InitializeConsole ();\r
484\r
485 // If BootNext environment variable is defined then we just load it !\r
486 BootNextSize = sizeof(UINT16);\r
487 Status = GetGlobalEnvironmentVariable (L"BootNext", NULL, &BootNextSize, (VOID**)&BootNext);\r
488 if (!EFI_ERROR(Status)) {\r
489 ASSERT(BootNextSize == sizeof(UINT16));\r
490\r
491 // Generate the requested Boot Entry variable name\r
492 UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", *BootNext);\r
493\r
494 // Set BootCurrent variable\r
495 gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,\r
496 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
497 BootNextSize, BootNext);\r
498\r
499 FreePool (BootNext);\r
500\r
501 // Start the requested Boot Entry\r
502 Status = BdsStartBootOption (BootVariableName);\r
503 if (Status != EFI_NOT_FOUND) {\r
504 // BootNext has not been succeeded launched\r
505 if (EFI_ERROR(Status)) {\r
506 Print(L"Fail to start BootNext.\n");\r
507 }\r
508\r
509 // Delete the BootNext environment variable\r
510 gRT->SetVariable (L"BootNext", &gEfiGlobalVariableGuid,\r
511 EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
512 0, NULL);\r
513 }\r
514\r
515 // Clear BootCurrent variable\r
516 gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,\r
517 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r
518 0, NULL);\r
519 }\r
520\r
521 // If Boot Order does not exist then create a default entry\r
522 DefineDefaultBootEntries ();\r
523\r
524 //\r
525 // Update the CRC32 in the EFI System Table header\r
526 //\r
527 gST->Hdr.CRC32 = 0;\r
528 Status = gBS->CalculateCrc32 ((VOID*)gST, gST->Hdr.HeaderSize, &gST->Hdr.CRC32);\r
529 ASSERT_EFI_ERROR (Status);\r
530\r
531 // Timer before initiating the default boot selection\r
532 StartDefaultBootOnTimeout ();\r
533\r
534 // Start the Boot Menu\r
535 Status = BootMenuMain ();\r
536 ASSERT_EFI_ERROR (Status);\r
537\r
538}\r
539\r
540EFI_BDS_ARCH_PROTOCOL gBdsProtocol = {\r
541 BdsEntry,\r
542};\r
543\r
544EFI_STATUS\r
545EFIAPI\r
546BdsInitialize (\r
547 IN EFI_HANDLE ImageHandle,\r
548 IN EFI_SYSTEM_TABLE *SystemTable\r
549 )\r
550{\r
551 EFI_STATUS Status;\r
552\r
553 Status = gBS->InstallMultipleProtocolInterfaces (\r
554 &ImageHandle,\r
555 &gEfiBdsArchProtocolGuid, &gBdsProtocol,\r
556 NULL\r
557 );\r
558 ASSERT_EFI_ERROR (Status);\r
559\r
560 return Status;\r
561}\r
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