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878ddf1f | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | ConPlatform.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | --*/\r | |
19 | \r | |
20 | #include "ConPlatform.h"\r | |
21 | \r | |
22 | EFI_DRIVER_BINDING_PROTOCOL gConPlatformTextInDriverBinding = {\r | |
23 | ConPlatformTextInDriverBindingSupported,\r | |
24 | ConPlatformTextInDriverBindingStart,\r | |
25 | ConPlatformDriverBindingStop,\r | |
26 | 0x10,\r | |
27 | NULL,\r | |
28 | NULL\r | |
29 | };\r | |
30 | \r | |
31 | EFI_DRIVER_BINDING_PROTOCOL gConPlatformTextOutDriverBinding = {\r | |
32 | ConPlatformTextOutDriverBindingSupported,\r | |
33 | ConPlatformTextOutDriverBindingStart,\r | |
34 | ConPlatformDriverBindingStop,\r | |
35 | 0x10,\r | |
36 | NULL,\r | |
37 | NULL\r | |
38 | };\r | |
39 | \r | |
40 | STATIC\r | |
41 | EFI_STATUS\r | |
42 | EFIAPI\r | |
43 | ConPlatformTextInDriverBindingSupported (\r | |
44 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
45 | IN EFI_HANDLE ControllerHandle,\r | |
46 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
47 | )\r | |
48 | /*++\r | |
49 | \r | |
50 | Routine Description:\r | |
51 | Supported \r | |
52 | \r | |
53 | Arguments:\r | |
54 | (Standard DriverBinding Protocol Supported() function)\r | |
55 | \r | |
56 | Returns:\r | |
57 | \r | |
58 | None\r | |
59 | \r | |
60 | --*/\r | |
61 | {\r | |
62 | return ConPlatformDriverBindingSupported (\r | |
63 | This,\r | |
64 | ControllerHandle,\r | |
65 | RemainingDevicePath,\r | |
66 | &gEfiSimpleTextInProtocolGuid\r | |
67 | );\r | |
68 | }\r | |
69 | \r | |
70 | STATIC\r | |
71 | EFI_STATUS\r | |
72 | EFIAPI\r | |
73 | ConPlatformTextOutDriverBindingSupported (\r | |
74 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
75 | IN EFI_HANDLE ControllerHandle,\r | |
76 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
77 | )\r | |
78 | /*++\r | |
79 | \r | |
80 | Routine Description:\r | |
81 | Supported \r | |
82 | \r | |
83 | Arguments:\r | |
84 | (Standard DriverBinding Protocol Supported() function)\r | |
85 | \r | |
86 | Returns:\r | |
87 | \r | |
88 | None\r | |
89 | \r | |
90 | --*/\r | |
91 | {\r | |
92 | return ConPlatformDriverBindingSupported (\r | |
93 | This,\r | |
94 | ControllerHandle,\r | |
95 | RemainingDevicePath,\r | |
96 | &gEfiSimpleTextOutProtocolGuid\r | |
97 | );\r | |
98 | }\r | |
99 | \r | |
100 | EFI_STATUS\r | |
101 | ConPlatformDriverBindingSupported (\r | |
102 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
103 | IN EFI_HANDLE ControllerHandle,\r | |
104 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath,\r | |
105 | IN EFI_GUID *ProtocolGuid\r | |
106 | )\r | |
107 | /*++\r | |
108 | \r | |
109 | Routine Description:\r | |
110 | Supported \r | |
111 | \r | |
112 | Arguments:\r | |
113 | (Standard DriverBinding Protocol Supported() function)\r | |
114 | \r | |
115 | Returns:\r | |
116 | \r | |
117 | None\r | |
118 | \r | |
119 | --*/\r | |
120 | {\r | |
121 | EFI_STATUS Status;\r | |
122 | VOID *Interface;\r | |
123 | \r | |
124 | //\r | |
125 | // Test to see if this is a physical device by checking to see if\r | |
126 | // it has a Device Path Protocol\r | |
127 | //\r | |
128 | Status = gBS->OpenProtocol (\r | |
129 | ControllerHandle,\r | |
130 | &gEfiDevicePathProtocolGuid,\r | |
131 | NULL,\r | |
132 | This->DriverBindingHandle,\r | |
133 | ControllerHandle,\r | |
134 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
135 | );\r | |
136 | if (EFI_ERROR (Status)) {\r | |
137 | return Status;\r | |
138 | }\r | |
139 | //\r | |
140 | // Test to see if this device supports the Simple Text Output Protocol\r | |
141 | //\r | |
142 | Status = gBS->OpenProtocol (\r | |
143 | ControllerHandle,\r | |
144 | ProtocolGuid,\r | |
145 | (VOID **) &Interface,\r | |
146 | This->DriverBindingHandle,\r | |
147 | ControllerHandle,\r | |
148 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
149 | );\r | |
150 | if (EFI_ERROR (Status)) {\r | |
151 | return Status;\r | |
152 | }\r | |
153 | \r | |
154 | gBS->CloseProtocol (\r | |
155 | ControllerHandle,\r | |
156 | ProtocolGuid,\r | |
157 | This->DriverBindingHandle,\r | |
158 | ControllerHandle\r | |
159 | );\r | |
160 | \r | |
161 | return EFI_SUCCESS;\r | |
162 | }\r | |
163 | \r | |
164 | STATIC\r | |
165 | EFI_STATUS\r | |
166 | EFIAPI\r | |
167 | ConPlatformTextInDriverBindingStart (\r | |
168 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
169 | IN EFI_HANDLE ControllerHandle,\r | |
170 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
171 | )\r | |
172 | /*++\r | |
173 | \r | |
174 | Routine Description:\r | |
175 | \r | |
176 | \r | |
177 | Arguments:\r | |
178 | (Standard DriverBinding Protocol Start() function)\r | |
179 | \r | |
180 | Returns:\r | |
181 | \r | |
182 | \r | |
183 | --*/\r | |
184 | {\r | |
185 | EFI_STATUS Status;\r | |
186 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
187 | EFI_SIMPLE_TEXT_IN_PROTOCOL *TextIn;\r | |
188 | \r | |
189 | //\r | |
190 | // Get the Device Path Protocol so the environment variables can be updated\r | |
191 | //\r | |
192 | Status = gBS->OpenProtocol (\r | |
193 | ControllerHandle,\r | |
194 | &gEfiDevicePathProtocolGuid,\r | |
195 | (VOID **) &DevicePath,\r | |
196 | This->DriverBindingHandle,\r | |
197 | ControllerHandle,\r | |
198 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
199 | );\r | |
200 | if (EFI_ERROR (Status)) {\r | |
201 | return Status;\r | |
202 | }\r | |
203 | //\r | |
204 | // Open the Simple Input Protocol BY_DRIVER\r | |
205 | //\r | |
206 | Status = gBS->OpenProtocol (\r | |
207 | ControllerHandle,\r | |
208 | &gEfiSimpleTextInProtocolGuid,\r | |
209 | (VOID **) &TextIn,\r | |
210 | This->DriverBindingHandle,\r | |
211 | ControllerHandle,\r | |
212 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
213 | );\r | |
214 | if (EFI_ERROR (Status)) {\r | |
215 | return Status;\r | |
216 | }\r | |
217 | //\r | |
218 | // Check the device handle, if it is a hot plug device,\r | |
219 | // do not put the device path into ConInDev, and install\r | |
220 | // gEfiConsoleInDeviceGuid to the device handle directly.\r | |
221 | // The policy is, make hot plug device plug in and play immediately.\r | |
222 | //\r | |
223 | if (IsHotPlugDevice (This->DriverBindingHandle, ControllerHandle)) {\r | |
224 | gBS->InstallMultipleProtocolInterfaces (\r | |
225 | &ControllerHandle,\r | |
226 | &gEfiConsoleInDeviceGuid,\r | |
227 | NULL,\r | |
228 | NULL\r | |
229 | );\r | |
230 | } else {\r | |
231 | //\r | |
232 | // Append the device path to the ConInDev environment variable\r | |
233 | //\r | |
234 | ConPlatformUpdateDeviceVariable (\r | |
235 | VarConsoleInpDev,\r | |
236 | DevicePath,\r | |
237 | APPEND\r | |
238 | );\r | |
239 | \r | |
240 | //\r | |
241 | // If the device path is an instance in the ConIn environment variable,\r | |
242 | // then install EfiConsoleInDeviceGuid onto ControllerHandle\r | |
243 | //\r | |
244 | Status = ConPlatformUpdateDeviceVariable (\r | |
245 | VarConsoleInp,\r | |
246 | DevicePath,\r | |
247 | CHECK\r | |
248 | );\r | |
249 | \r | |
250 | if (!EFI_ERROR (Status)) {\r | |
251 | gBS->InstallMultipleProtocolInterfaces (\r | |
252 | &ControllerHandle,\r | |
253 | &gEfiConsoleInDeviceGuid,\r | |
254 | NULL,\r | |
255 | NULL\r | |
256 | );\r | |
257 | } else {\r | |
258 | gBS->CloseProtocol (\r | |
259 | ControllerHandle,\r | |
260 | &gEfiSimpleTextInProtocolGuid,\r | |
261 | This->DriverBindingHandle,\r | |
262 | ControllerHandle\r | |
263 | );\r | |
264 | }\r | |
265 | }\r | |
266 | \r | |
267 | return EFI_SUCCESS;\r | |
268 | }\r | |
269 | \r | |
270 | STATIC\r | |
271 | EFI_STATUS\r | |
272 | EFIAPI\r | |
273 | ConPlatformTextOutDriverBindingStart (\r | |
274 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
275 | IN EFI_HANDLE ControllerHandle,\r | |
276 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
277 | )\r | |
278 | /*++\r | |
279 | \r | |
280 | Routine Description:\r | |
281 | \r | |
282 | \r | |
283 | Arguments:\r | |
284 | (Standard DriverBinding Protocol Start() function)\r | |
285 | \r | |
286 | Returns:\r | |
287 | \r | |
288 | \r | |
289 | --*/\r | |
290 | {\r | |
291 | EFI_STATUS Status;\r | |
292 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
293 | EFI_SIMPLE_TEXT_OUT_PROTOCOL *TextOut;\r | |
294 | \r | |
295 | BOOLEAN NeedClose;\r | |
296 | \r | |
297 | NeedClose = TRUE;\r | |
298 | \r | |
299 | //\r | |
300 | // Get the Device Path Protocol so the environment variables can be updated\r | |
301 | //\r | |
302 | Status = gBS->OpenProtocol (\r | |
303 | ControllerHandle,\r | |
304 | &gEfiDevicePathProtocolGuid,\r | |
305 | (VOID **) &DevicePath,\r | |
306 | This->DriverBindingHandle,\r | |
307 | ControllerHandle,\r | |
308 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
309 | );\r | |
310 | if (EFI_ERROR (Status)) {\r | |
311 | return Status;\r | |
312 | }\r | |
313 | //\r | |
314 | // Open the Simple Text Output Protocol BY_DRIVER\r | |
315 | //\r | |
316 | Status = gBS->OpenProtocol (\r | |
317 | ControllerHandle,\r | |
318 | &gEfiSimpleTextOutProtocolGuid,\r | |
319 | (VOID **) &TextOut,\r | |
320 | This->DriverBindingHandle,\r | |
321 | ControllerHandle,\r | |
322 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
323 | );\r | |
324 | if (EFI_ERROR (Status)) {\r | |
325 | return Status;\r | |
326 | }\r | |
327 | //\r | |
328 | // Check the device handle, if it is a hot plug device,\r | |
329 | // do not put the device path into ConOutDev and StdErrDev,\r | |
330 | // and install gEfiConsoleOutDeviceGuid to the device handle directly.\r | |
331 | // The policy is, make hot plug device plug in and play immediately.\r | |
332 | //\r | |
333 | if (IsHotPlugDevice (This->DriverBindingHandle, ControllerHandle)) {\r | |
334 | gBS->InstallMultipleProtocolInterfaces (\r | |
335 | &ControllerHandle,\r | |
336 | &gEfiConsoleOutDeviceGuid,\r | |
337 | NULL,\r | |
338 | NULL\r | |
339 | );\r | |
340 | } else {\r | |
341 | //\r | |
342 | // Append the device path to the ConOutDev environment variable\r | |
343 | //\r | |
344 | ConPlatformUpdateDeviceVariable (\r | |
345 | VarConsoleOutDev,\r | |
346 | DevicePath,\r | |
347 | APPEND\r | |
348 | );\r | |
349 | //\r | |
350 | // Append the device path to the StdErrDev environment variable\r | |
351 | //\r | |
352 | ConPlatformUpdateDeviceVariable (\r | |
353 | VarErrorOutDev,\r | |
354 | DevicePath,\r | |
355 | APPEND\r | |
356 | );\r | |
357 | \r | |
358 | //\r | |
359 | // If the device path is an instance in the ConOut environment variable,\r | |
360 | // then install EfiConsoleOutDeviceGuid onto ControllerHandle\r | |
361 | //\r | |
362 | Status = ConPlatformUpdateDeviceVariable (\r | |
363 | VarConsoleOut,\r | |
364 | DevicePath,\r | |
365 | CHECK\r | |
366 | );\r | |
367 | if (!EFI_ERROR (Status)) {\r | |
368 | NeedClose = FALSE;\r | |
369 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
370 | &ControllerHandle,\r | |
371 | &gEfiConsoleOutDeviceGuid,\r | |
372 | NULL,\r | |
373 | NULL\r | |
374 | );\r | |
375 | }\r | |
376 | //\r | |
377 | // If the device path is an instance in the StdErr environment variable,\r | |
378 | // then install EfiStandardErrorDeviceGuid onto ControllerHandle\r | |
379 | //\r | |
380 | Status = ConPlatformUpdateDeviceVariable (\r | |
381 | VarErrorOut,\r | |
382 | DevicePath,\r | |
383 | CHECK\r | |
384 | );\r | |
385 | if (!EFI_ERROR (Status)) {\r | |
386 | NeedClose = FALSE;\r | |
387 | gBS->InstallMultipleProtocolInterfaces (\r | |
388 | &ControllerHandle,\r | |
389 | &gEfiStandardErrorDeviceGuid,\r | |
390 | NULL,\r | |
391 | NULL\r | |
392 | );\r | |
393 | }\r | |
394 | \r | |
395 | if (NeedClose) {\r | |
396 | gBS->CloseProtocol (\r | |
397 | ControllerHandle,\r | |
398 | &gEfiSimpleTextOutProtocolGuid,\r | |
399 | This->DriverBindingHandle,\r | |
400 | ControllerHandle\r | |
401 | );\r | |
402 | }\r | |
403 | }\r | |
404 | \r | |
405 | return EFI_SUCCESS;\r | |
406 | }\r | |
407 | \r | |
408 | STATIC\r | |
409 | EFI_STATUS\r | |
410 | EFIAPI\r | |
411 | ConPlatformDriverBindingStop (\r | |
412 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
413 | IN EFI_HANDLE ControllerHandle,\r | |
414 | IN UINTN NumberOfChildren,\r | |
415 | IN EFI_HANDLE *ChildHandleBuffer\r | |
416 | )\r | |
417 | /*++\r | |
418 | \r | |
419 | Routine Description:\r | |
420 | \r | |
421 | Arguments:\r | |
422 | (Standard DriverBinding Protocol Stop() function)\r | |
423 | \r | |
424 | Returns:\r | |
425 | \r | |
426 | None\r | |
427 | \r | |
428 | --*/\r | |
429 | {\r | |
430 | EFI_STATUS Status;\r | |
431 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
432 | \r | |
433 | //\r | |
434 | // hot plug device is not included into the console associated variables,\r | |
435 | // so no need to check variable for those hot plug devices.\r | |
436 | //\r | |
437 | if (!IsHotPlugDevice (This->DriverBindingHandle, ControllerHandle)) {\r | |
438 | //\r | |
439 | // Get the Device Path Protocol so the environment variables can be updated\r | |
440 | //\r | |
441 | Status = gBS->OpenProtocol (\r | |
442 | ControllerHandle,\r | |
443 | &gEfiDevicePathProtocolGuid,\r | |
444 | (VOID **) &DevicePath,\r | |
445 | This->DriverBindingHandle,\r | |
446 | ControllerHandle,\r | |
447 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
448 | );\r | |
449 | if (!EFI_ERROR (Status)) {\r | |
450 | //\r | |
451 | // Remove DevicePath from ConInDev, ConOutDev, and StdErrDev\r | |
452 | //\r | |
453 | ConPlatformUpdateDeviceVariable (\r | |
454 | VarConsoleInpDev,\r | |
455 | DevicePath,\r | |
456 | DELETE\r | |
457 | );\r | |
458 | ConPlatformUpdateDeviceVariable (\r | |
459 | VarConsoleOutDev,\r | |
460 | DevicePath,\r | |
461 | DELETE\r | |
462 | );\r | |
463 | ConPlatformUpdateDeviceVariable (\r | |
464 | VarErrorOutDev,\r | |
465 | DevicePath,\r | |
466 | DELETE\r | |
467 | );\r | |
468 | }\r | |
469 | }\r | |
470 | //\r | |
471 | // Uninstall the Console Device GUIDs from Controller Handle\r | |
472 | //\r | |
473 | ConPlatformUnInstallProtocol (\r | |
474 | This,\r | |
475 | ControllerHandle,\r | |
476 | &gEfiConsoleInDeviceGuid\r | |
477 | );\r | |
478 | \r | |
479 | ConPlatformUnInstallProtocol (\r | |
480 | This,\r | |
481 | ControllerHandle,\r | |
482 | &gEfiConsoleOutDeviceGuid\r | |
483 | );\r | |
484 | \r | |
485 | ConPlatformUnInstallProtocol (\r | |
486 | This,\r | |
487 | ControllerHandle,\r | |
488 | &gEfiStandardErrorDeviceGuid\r | |
489 | );\r | |
490 | \r | |
491 | //\r | |
492 | // Close the Simple Input and Simple Text Output Protocols\r | |
493 | //\r | |
494 | gBS->CloseProtocol (\r | |
495 | ControllerHandle,\r | |
496 | &gEfiSimpleTextInProtocolGuid,\r | |
497 | This->DriverBindingHandle,\r | |
498 | ControllerHandle\r | |
499 | );\r | |
500 | \r | |
501 | gBS->CloseProtocol (\r | |
502 | ControllerHandle,\r | |
503 | &gEfiSimpleTextOutProtocolGuid,\r | |
504 | This->DriverBindingHandle,\r | |
505 | ControllerHandle\r | |
506 | );\r | |
507 | \r | |
508 | return EFI_SUCCESS;\r | |
509 | }\r | |
510 | \r | |
511 | VOID\r | |
512 | ConPlatformUnInstallProtocol (\r | |
513 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
514 | IN EFI_HANDLE Handle,\r | |
515 | IN EFI_GUID *ProtocolGuid\r | |
516 | )\r | |
517 | {\r | |
518 | EFI_STATUS Status;\r | |
519 | \r | |
520 | Status = gBS->OpenProtocol (\r | |
521 | Handle,\r | |
522 | ProtocolGuid,\r | |
523 | NULL,\r | |
524 | This->DriverBindingHandle,\r | |
525 | Handle,\r | |
526 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
527 | );\r | |
528 | \r | |
529 | if (!EFI_ERROR (Status)) {\r | |
530 | gBS->UninstallMultipleProtocolInterfaces (\r | |
531 | Handle,\r | |
532 | ProtocolGuid,\r | |
533 | NULL,\r | |
534 | NULL\r | |
535 | );\r | |
536 | }\r | |
537 | \r | |
538 | return ;\r | |
539 | }\r | |
540 | \r | |
541 | VOID *\r | |
542 | ConPlatformGetVariable (\r | |
543 | IN CHAR16 *Name\r | |
544 | )\r | |
545 | /*++\r | |
546 | \r | |
547 | Routine Description:\r | |
548 | Read the EFI variable (Name) and return a dynamically allocated\r | |
549 | buffer, and the size of the buffer. On failure return NULL.\r | |
550 | \r | |
551 | Arguments:\r | |
552 | Name - String part of EFI variable name\r | |
553 | \r | |
554 | Returns:\r | |
555 | Dynamically allocated memory that contains a copy of the EFI variable.\r | |
556 | Caller is repsoncible freeing the buffer.\r | |
557 | \r | |
558 | NULL - Variable was not read\r | |
559 | \r | |
560 | --*/\r | |
561 | {\r | |
562 | EFI_STATUS Status;\r | |
563 | VOID *Buffer;\r | |
564 | UINTN BufferSize;\r | |
565 | \r | |
566 | BufferSize = 0;\r | |
567 | Buffer = NULL;\r | |
568 | \r | |
569 | //\r | |
570 | // Test to see if the variable exists. If it doesn't reuturn NULL\r | |
571 | //\r | |
572 | Status = gRT->GetVariable (\r | |
573 | Name,\r | |
574 | &gEfiGlobalVariableGuid,\r | |
575 | NULL,\r | |
576 | &BufferSize,\r | |
577 | Buffer\r | |
578 | );\r | |
579 | \r | |
580 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
581 | //\r | |
582 | // Allocate the buffer to return\r | |
583 | //\r | |
584 | Status = gBS->AllocatePool (EfiBootServicesData, BufferSize, &Buffer);\r | |
585 | if (EFI_ERROR (Status)) {\r | |
586 | return NULL;\r | |
587 | }\r | |
588 | //\r | |
589 | // Read variable into the allocated buffer.\r | |
590 | //\r | |
591 | Status = gRT->GetVariable (\r | |
592 | Name,\r | |
593 | &gEfiGlobalVariableGuid,\r | |
594 | NULL,\r | |
595 | &BufferSize,\r | |
596 | Buffer\r | |
597 | );\r | |
598 | if (EFI_ERROR (Status)) {\r | |
599 | gBS->FreePool (Buffer);\r | |
600 | Buffer = NULL;\r | |
601 | }\r | |
602 | }\r | |
603 | \r | |
604 | return Buffer;\r | |
605 | }\r | |
606 | \r | |
607 | EFI_STATUS\r | |
608 | ConPlatformMatchDevicePaths (\r | |
609 | IN EFI_DEVICE_PATH_PROTOCOL * Multi,\r | |
610 | IN EFI_DEVICE_PATH_PROTOCOL * Single,\r | |
611 | IN EFI_DEVICE_PATH_PROTOCOL **NewDevicePath OPTIONAL,\r | |
612 | IN BOOLEAN Delete\r | |
613 | )\r | |
614 | /*++\r | |
615 | \r | |
616 | Routine Description:\r | |
617 | Function compares a device path data structure to that of all the nodes of a\r | |
618 | second device path instance.\r | |
619 | \r | |
620 | Arguments:\r | |
621 | Multi - A pointer to a multi-instance device path data structure.\r | |
622 | \r | |
623 | Single - A pointer to a single-instance device path data structure.\r | |
624 | \r | |
625 | NewDevicePath - If Delete is TRUE, this parameter must not be null, and it\r | |
626 | points to the remaining device path data structure. \r | |
627 | (remaining device path = Multi - Single.)\r | |
628 | \r | |
629 | Delete - If TRUE, means removing Single from Multi.\r | |
630 | If FALSE, the routine just check whether Single matches \r | |
631 | with any instance in Multi.\r | |
632 | \r | |
633 | Returns:\r | |
634 | \r | |
635 | The function returns EFI_SUCCESS if the Single is contained within Multi. \r | |
636 | Otherwise, EFI_NOT_FOUND is returned.\r | |
637 | \r | |
638 | --*/\r | |
639 | {\r | |
640 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
641 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePath1;\r | |
642 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePath2;\r | |
643 | EFI_DEVICE_PATH_PROTOCOL *DevicePathInst;\r | |
644 | UINTN Size;\r | |
645 | \r | |
646 | //\r | |
647 | // The passed in DevicePath should not be NULL\r | |
648 | //\r | |
649 | if ((!Multi) || (!Single)) {\r | |
650 | return EFI_NOT_FOUND;\r | |
651 | }\r | |
652 | //\r | |
653 | // if performing Delete operation, the NewDevicePath must not be NULL.\r | |
654 | //\r | |
655 | TempDevicePath1 = NULL;\r | |
656 | \r | |
657 | DevicePath = Multi;\r | |
658 | DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);\r | |
659 | \r | |
660 | //\r | |
661 | // search for the match of 'Single' in 'Multi'\r | |
662 | //\r | |
663 | while (DevicePathInst) {\r | |
664 | if (CompareMem (Single, DevicePathInst, Size) == 0) {\r | |
665 | if (!Delete) {\r | |
666 | gBS->FreePool (DevicePathInst);\r | |
667 | return EFI_SUCCESS;\r | |
668 | }\r | |
669 | } else {\r | |
670 | if (Delete) {\r | |
671 | TempDevicePath2 = AppendDevicePathInstance (\r | |
672 | TempDevicePath1,\r | |
673 | DevicePathInst\r | |
674 | );\r | |
675 | gBS->FreePool (TempDevicePath1);\r | |
676 | TempDevicePath1 = TempDevicePath2;\r | |
677 | }\r | |
678 | }\r | |
679 | \r | |
680 | gBS->FreePool (DevicePathInst);\r | |
681 | DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);\r | |
682 | }\r | |
683 | \r | |
684 | if (Delete) {\r | |
685 | *NewDevicePath = TempDevicePath1;\r | |
686 | return EFI_SUCCESS;\r | |
687 | }\r | |
688 | \r | |
689 | return EFI_NOT_FOUND;\r | |
690 | }\r | |
691 | \r | |
692 | EFI_STATUS\r | |
693 | ConPlatformUpdateDeviceVariable (\r | |
694 | IN CHAR16 *VariableName,\r | |
695 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r | |
696 | IN CONPLATFORM_VAR_OPERATION Operation\r | |
697 | )\r | |
698 | /*++\r | |
699 | \r | |
700 | Routine Description:\r | |
701 | \r | |
702 | \r | |
703 | Arguments:\r | |
704 | \r | |
705 | Returns:\r | |
706 | \r | |
707 | None\r | |
708 | \r | |
709 | --*/\r | |
710 | {\r | |
711 | EFI_STATUS Status;\r | |
712 | EFI_DEVICE_PATH_PROTOCOL *VariableDevicePath;\r | |
713 | EFI_DEVICE_PATH_PROTOCOL *NewVariableDevicePath;\r | |
714 | \r | |
715 | VariableDevicePath = NULL;\r | |
716 | NewVariableDevicePath = NULL;\r | |
717 | \r | |
718 | //\r | |
719 | // Get Variable according to variable name.\r | |
720 | // The memory for Variable is allocated within ConPlatformGetVarible(),\r | |
721 | // it is the caller's responsibility to free the memory before return.\r | |
722 | //\r | |
723 | VariableDevicePath = ConPlatformGetVariable (VariableName);\r | |
724 | \r | |
725 | if (Operation != DELETE) {\r | |
726 | \r | |
727 | Status = ConPlatformMatchDevicePaths (\r | |
728 | VariableDevicePath,\r | |
729 | DevicePath,\r | |
730 | NULL,\r | |
731 | FALSE\r | |
732 | );\r | |
733 | \r | |
734 | if ((Operation == CHECK) || (!EFI_ERROR (Status))) {\r | |
735 | //\r | |
736 | // The device path is already in the variable\r | |
737 | //\r | |
738 | gBS->FreePool (VariableDevicePath);\r | |
739 | \r | |
740 | return Status;\r | |
741 | }\r | |
742 | //\r | |
743 | // The device path is not in variable. Append DevicePath to the\r | |
744 | // environment variable that is a multi-instance device path.\r | |
745 | //\r | |
746 | Status = EFI_SUCCESS;\r | |
747 | NewVariableDevicePath = AppendDevicePathInstance (\r | |
748 | VariableDevicePath,\r | |
749 | DevicePath\r | |
750 | );\r | |
751 | if (NewVariableDevicePath == NULL) {\r | |
752 | Status = EFI_OUT_OF_RESOURCES;\r | |
753 | }\r | |
754 | \r | |
755 | } else {\r | |
756 | //\r | |
757 | // Remove DevicePath from the environment variable that\r | |
758 | // is a multi-instance device path.\r | |
759 | //\r | |
760 | Status = ConPlatformMatchDevicePaths (\r | |
761 | VariableDevicePath,\r | |
762 | DevicePath,\r | |
763 | &NewVariableDevicePath,\r | |
764 | TRUE\r | |
765 | );\r | |
766 | }\r | |
767 | \r | |
768 | gBS->FreePool (VariableDevicePath);\r | |
769 | \r | |
770 | if (EFI_ERROR (Status)) {\r | |
771 | return Status;\r | |
772 | }\r | |
773 | \r | |
774 | Status = gRT->SetVariable (\r | |
775 | VariableName,\r | |
776 | &gEfiGlobalVariableGuid,\r | |
777 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r | |
778 | GetDevicePathSize (NewVariableDevicePath),\r | |
779 | NewVariableDevicePath\r | |
780 | );\r | |
781 | \r | |
782 | gBS->FreePool (NewVariableDevicePath);\r | |
783 | \r | |
784 | return Status;\r | |
785 | }\r | |
786 | \r | |
787 | BOOLEAN\r | |
788 | IsHotPlugDevice (\r | |
789 | EFI_HANDLE DriverBindingHandle,\r | |
790 | EFI_HANDLE ControllerHandle\r | |
791 | )\r | |
792 | {\r | |
793 | EFI_STATUS Status;\r | |
794 | \r | |
795 | //\r | |
796 | // HotPlugDeviceGuid indicates ControllerHandle stands for a hot plug device.\r | |
797 | //\r | |
798 | Status = gBS->OpenProtocol (\r | |
799 | ControllerHandle,\r | |
800 | &gEfiHotPlugDeviceGuid,\r | |
801 | NULL,\r | |
802 | DriverBindingHandle,\r | |
803 | ControllerHandle,\r | |
804 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
805 | );\r | |
806 | if (EFI_ERROR (Status)) {\r | |
807 | return FALSE;\r | |
808 | }\r | |
809 | \r | |
810 | return TRUE;\r | |
811 | }\r |