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3eb9473e | 1 | /*++\r |
2 | \r | |
3e99020d | 3 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
4ea9375a | 4 | This program and the accompanying materials \r |
3eb9473e | 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 | RtDevicePath.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Device Path services. The thing to remember is device paths are built out of\r | |
19 | nodes. The device path is terminated by an end node that is length\r | |
20 | sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is sizeof(EFI_DEVICE_PATH_PROTOCOL)\r | |
21 | all over this file.\r | |
22 | \r | |
23 | The only place where multi-instance device paths are supported is in\r | |
24 | environment varibles. Multi-instance device paths should never be placed\r | |
25 | on a Handle.\r | |
26 | \r | |
27 | --*/\r | |
28 | \r | |
29 | #include "Tiano.h"\r | |
30 | #include "EfiRuntimeLib.h"\r | |
31 | #include "RtDevicePath.h"\r | |
32 | #include EFI_GUID_DEFINITION (FrameworkDevicePath)\r | |
33 | #include EFI_PROTOCOL_DEFINITION (DevicePath)\r | |
34 | \r | |
35 | STATIC\r | |
36 | VOID *\r | |
37 | InternalAllocatePool (\r | |
38 | IN UINTN AllocationSize\r | |
39 | )\r | |
40 | /*++\r | |
41 | \r | |
42 | Routine Description:\r | |
43 | \r | |
44 | Allocate BootServicesData pool.\r | |
45 | \r | |
46 | Arguments:\r | |
47 | \r | |
48 | AllocationSize - The size to allocate\r | |
49 | \r | |
50 | Returns:\r | |
51 | \r | |
52 | Pointer of the buffer allocated.\r | |
53 | \r | |
54 | --*/\r | |
55 | {\r | |
56 | VOID *Memory;\r | |
57 | \r | |
58 | Memory = NULL;\r | |
59 | gBS->AllocatePool (EfiBootServicesData, AllocationSize, &Memory);\r | |
60 | return Memory;\r | |
61 | }\r | |
62 | \r | |
63 | STATIC\r | |
64 | VOID *\r | |
65 | InternalAllocateCopyPool (\r | |
66 | IN UINTN AllocationSize,\r | |
67 | IN VOID *Buffer\r | |
68 | )\r | |
69 | /*++\r | |
70 | \r | |
71 | Routine Description:\r | |
72 | \r | |
73 | Allocate BootServicesData pool and use a buffer provided by \r | |
74 | caller to fill it.\r | |
75 | \r | |
76 | Arguments:\r | |
77 | \r | |
78 | AllocationSize - The size to allocate\r | |
79 | \r | |
80 | Buffer - Buffer that will be filled into the buffer allocated\r | |
81 | \r | |
82 | Returns:\r | |
83 | \r | |
84 | Pointer of the buffer allocated.\r | |
85 | \r | |
86 | --*/\r | |
87 | {\r | |
88 | VOID *Memory;\r | |
89 | \r | |
90 | Memory = NULL;\r | |
91 | gBS->AllocatePool (EfiBootServicesData, AllocationSize, &Memory);\r | |
92 | if (Memory != NULL) {\r | |
93 | gBS->CopyMem (Memory, Buffer, AllocationSize);\r | |
94 | }\r | |
95 | \r | |
96 | return Memory;\r | |
97 | }\r | |
98 | \r | |
99 | STATIC\r | |
100 | VOID *\r | |
101 | InternalAllocateZeroPool (\r | |
102 | IN UINTN AllocationSize\r | |
103 | )\r | |
104 | /*++\r | |
105 | \r | |
106 | Routine Description:\r | |
107 | \r | |
108 | Allocate BootServicesData pool and zero it.\r | |
109 | \r | |
110 | Arguments:\r | |
111 | \r | |
112 | AllocationSize - The size to allocate\r | |
113 | \r | |
114 | Returns:\r | |
115 | \r | |
116 | Pointer of the buffer allocated.\r | |
117 | \r | |
118 | --*/\r | |
119 | {\r | |
120 | VOID *Memory;\r | |
121 | \r | |
122 | Memory = InternalAllocatePool (AllocationSize);\r | |
123 | if (Memory != NULL) {\r | |
124 | gBS->SetMem (Memory, AllocationSize, 0);\r | |
125 | }\r | |
126 | \r | |
127 | return Memory;\r | |
128 | }\r | |
129 | \r | |
130 | EFI_DEVICE_PATH_PROTOCOL *\r | |
131 | RtEfiDevicePathInstance (\r | |
132 | IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,\r | |
133 | OUT UINTN *Size\r | |
134 | )\r | |
135 | /*++\r | |
136 | \r | |
137 | Routine Description:\r | |
138 | Function retrieves the next device path instance from a device path data structure.\r | |
139 | \r | |
140 | Arguments:\r | |
141 | DevicePath - A pointer to a device path data structure.\r | |
142 | \r | |
143 | Size - A pointer to the size of a device path instance in bytes.\r | |
144 | \r | |
145 | Returns:\r | |
146 | \r | |
147 | This function returns a pointer to the current device path instance.\r | |
148 | In addition, it returns the size in bytes of the current device path instance in Size,\r | |
149 | and a pointer to the next device path instance in DevicePath.\r | |
150 | If there are no more device path instances in DevicePath, then DevicePath will be set to NULL.\r | |
151 | \r | |
152 | --*/\r | |
153 | {\r | |
154 | EFI_DEVICE_PATH_PROTOCOL *DevPath;\r | |
155 | EFI_DEVICE_PATH_PROTOCOL *ReturnValue;\r | |
156 | UINT8 Temp;\r | |
157 | \r | |
158 | if (*DevicePath == NULL) {\r | |
159 | if (Size != NULL) {\r | |
160 | *Size = 0;\r | |
161 | }\r | |
162 | \r | |
163 | return NULL;\r | |
164 | }\r | |
165 | \r | |
166 | //\r | |
167 | // Find the end of the device path instance\r | |
168 | //\r | |
169 | DevPath = *DevicePath;\r | |
170 | while (!IsDevicePathEndType (DevPath)) {\r | |
171 | DevPath = NextDevicePathNode (DevPath);\r | |
172 | }\r | |
173 | \r | |
174 | //\r | |
175 | // Compute the size of the device path instance\r | |
176 | //\r | |
177 | if (Size != NULL) {\r | |
178 | *Size = ((UINTN) DevPath - (UINTN) (*DevicePath)) + sizeof (EFI_DEVICE_PATH_PROTOCOL);\r | |
179 | }\r | |
180 | \r | |
181 | //\r | |
182 | // Make a copy and return the device path instance\r | |
183 | //\r | |
184 | Temp = DevPath->SubType;\r | |
185 | DevPath->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r | |
186 | ReturnValue = RtEfiDuplicateDevicePath (*DevicePath);\r | |
187 | DevPath->SubType = Temp;\r | |
188 | \r | |
189 | //\r | |
190 | // If DevPath is the end of an entire device path, then another instance\r | |
191 | // does not follow, so *DevicePath is set to NULL.\r | |
192 | //\r | |
193 | if (DevicePathSubType (DevPath) == END_ENTIRE_DEVICE_PATH_SUBTYPE) {\r | |
194 | *DevicePath = NULL;\r | |
195 | } else {\r | |
196 | *DevicePath = NextDevicePathNode (DevPath);\r | |
197 | }\r | |
198 | \r | |
199 | return ReturnValue;\r | |
200 | }\r | |
201 | \r | |
202 | BOOLEAN\r | |
203 | RtEfiIsDevicePathMultiInstance (\r | |
204 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
205 | )\r | |
206 | /*++\r | |
207 | \r | |
208 | Routine Description:\r | |
209 | Return TRUE is this is a multi instance device path.\r | |
210 | \r | |
211 | Arguments:\r | |
212 | DevicePath - A pointer to a device path data structure.\r | |
213 | \r | |
214 | \r | |
215 | Returns:\r | |
216 | TRUE - If DevicePath is multi instance. FALSE - If DevicePath is not multi\r | |
217 | instance.\r | |
218 | \r | |
219 | --*/\r | |
220 | {\r | |
221 | EFI_DEVICE_PATH_PROTOCOL *Node;\r | |
222 | \r | |
223 | if (DevicePath == NULL) {\r | |
224 | return FALSE;\r | |
225 | }\r | |
226 | \r | |
227 | Node = DevicePath;\r | |
228 | while (!EfiIsDevicePathEnd (Node)) {\r | |
229 | if (EfiIsDevicePathEndInstance (Node)) {\r | |
230 | return TRUE;\r | |
231 | }\r | |
232 | \r | |
233 | Node = EfiNextDevicePathNode (Node);\r | |
234 | }\r | |
235 | \r | |
236 | return FALSE;\r | |
237 | }\r | |
238 | \r | |
239 | UINTN\r | |
240 | RtEfiDevicePathSize (\r | |
241 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
242 | )\r | |
243 | /*++\r | |
244 | \r | |
245 | Routine Description:\r | |
246 | \r | |
247 | Calculate the space size of a device path.\r | |
248 | \r | |
249 | Arguments:\r | |
250 | \r | |
251 | DevicePath - A specified device path\r | |
252 | \r | |
253 | Returns:\r | |
254 | \r | |
255 | The size.\r | |
256 | \r | |
257 | --*/\r | |
258 | {\r | |
259 | EFI_DEVICE_PATH_PROTOCOL *Start;\r | |
260 | \r | |
261 | if (DevicePath == NULL) {\r | |
262 | return 0;\r | |
263 | }\r | |
264 | \r | |
265 | //\r | |
266 | // Search for the end of the device path structure\r | |
267 | //\r | |
268 | Start = DevicePath;\r | |
269 | while (!EfiIsDevicePathEnd (DevicePath)) {\r | |
270 | DevicePath = EfiNextDevicePathNode (DevicePath);\r | |
271 | }\r | |
272 | \r | |
273 | //\r | |
274 | // Compute the size and add back in the size of the end device path structure\r | |
275 | //\r | |
276 | return ((UINTN) DevicePath - (UINTN) Start) + sizeof (EFI_DEVICE_PATH_PROTOCOL);\r | |
277 | }\r | |
278 | \r | |
279 | EFI_DEVICE_PATH_PROTOCOL *\r | |
280 | RtEfiDevicePathFromHandle (\r | |
281 | IN EFI_HANDLE Handle\r | |
282 | )\r | |
283 | /*++\r | |
284 | \r | |
285 | Routine Description:\r | |
286 | \r | |
287 | Get the device path protocol interface installed on a specified handle.\r | |
288 | \r | |
289 | Arguments:\r | |
290 | \r | |
291 | Handle - a specified handle\r | |
292 | \r | |
293 | Returns:\r | |
294 | \r | |
295 | The device path protocol interface installed on that handle.\r | |
296 | \r | |
297 | --*/\r | |
298 | {\r | |
299 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
300 | \r | |
301 | DevicePath = NULL;\r | |
302 | gBS->HandleProtocol (\r | |
303 | Handle,\r | |
304 | &gEfiDevicePathProtocolGuid,\r | |
305 | (VOID *) &DevicePath\r | |
306 | );\r | |
307 | return DevicePath;\r | |
308 | }\r | |
309 | \r | |
310 | EFI_DEVICE_PATH_PROTOCOL *\r | |
311 | RtEfiDuplicateDevicePath (\r | |
312 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
313 | )\r | |
314 | /*++\r | |
315 | \r | |
316 | Routine Description:\r | |
317 | \r | |
318 | Duplicate a device path structure.\r | |
319 | \r | |
320 | Arguments:\r | |
321 | \r | |
322 | DevicePath - The device path to duplicated.\r | |
323 | \r | |
324 | Returns:\r | |
325 | \r | |
326 | The duplicated device path.\r | |
327 | \r | |
328 | --*/\r | |
329 | {\r | |
330 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r | |
331 | UINTN Size;\r | |
332 | \r | |
333 | if (DevicePath == NULL) {\r | |
334 | return NULL;\r | |
335 | }\r | |
336 | \r | |
337 | //\r | |
338 | // Compute the size\r | |
339 | //\r | |
340 | Size = RtEfiDevicePathSize (DevicePath);\r | |
341 | if (Size == 0) {\r | |
342 | return NULL;\r | |
343 | }\r | |
344 | \r | |
345 | //\r | |
346 | // Allocate space for duplicate device path\r | |
347 | //\r | |
348 | NewDevicePath = InternalAllocateCopyPool (Size, DevicePath);\r | |
349 | \r | |
350 | return NewDevicePath;\r | |
351 | }\r | |
352 | \r | |
353 | EFI_DEVICE_PATH_PROTOCOL *\r | |
354 | RtEfiAppendDevicePath (\r | |
355 | IN EFI_DEVICE_PATH_PROTOCOL *Src1,\r | |
356 | IN EFI_DEVICE_PATH_PROTOCOL *Src2\r | |
357 | )\r | |
358 | /*++\r | |
359 | \r | |
360 | Routine Description:\r | |
361 | Function is used to append a Src1 and Src2 together.\r | |
362 | \r | |
363 | Arguments:\r | |
364 | Src1 - A pointer to a device path data structure.\r | |
365 | \r | |
366 | Src2 - A pointer to a device path data structure.\r | |
367 | \r | |
368 | Returns:\r | |
369 | \r | |
370 | A pointer to the new device path is returned.\r | |
371 | NULL is returned if space for the new device path could not be allocated from pool.\r | |
372 | It is up to the caller to free the memory used by Src1 and Src2 if they are no longer needed.\r | |
373 | \r | |
374 | --*/\r | |
375 | {\r | |
376 | UINTN Size;\r | |
377 | UINTN Size1;\r | |
378 | UINTN Size2;\r | |
379 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r | |
380 | EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath;\r | |
381 | \r | |
382 | //\r | |
383 | // If there's only 1 path, just duplicate it\r | |
384 | //\r | |
385 | if (!Src1) {\r | |
386 | ASSERT (!IsDevicePathUnpacked (Src2));\r | |
387 | return RtEfiDuplicateDevicePath (Src2);\r | |
388 | }\r | |
389 | \r | |
390 | if (!Src2) {\r | |
391 | ASSERT (!IsDevicePathUnpacked (Src1));\r | |
392 | return RtEfiDuplicateDevicePath (Src1);\r | |
393 | }\r | |
394 | \r | |
395 | //\r | |
396 | // Allocate space for the combined device path. It only has one end node of\r | |
397 | // length EFI_DEVICE_PATH_PROTOCOL\r | |
398 | //\r | |
399 | Size1 = RtEfiDevicePathSize (Src1);\r | |
400 | Size2 = RtEfiDevicePathSize (Src2);\r | |
401 | Size = Size1 + Size2 - sizeof (EFI_DEVICE_PATH_PROTOCOL);\r | |
402 | \r | |
403 | NewDevicePath = InternalAllocateCopyPool (Size, Src1);\r | |
404 | \r | |
405 | if (NewDevicePath != NULL) {\r | |
406 | \r | |
407 | //\r | |
408 | // Over write Src1 EndNode and do the copy\r | |
409 | //\r | |
410 | SecondDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) ((CHAR8 *) NewDevicePath + (Size1 - sizeof (EFI_DEVICE_PATH_PROTOCOL)));\r | |
411 | EfiCopyMem (SecondDevicePath, Src2, Size2);\r | |
412 | }\r | |
413 | \r | |
414 | return NewDevicePath;\r | |
415 | }\r | |
416 | \r | |
417 | EFI_DEVICE_PATH_PROTOCOL *\r | |
418 | RtEfiAppendDevicePathNode (\r | |
419 | IN EFI_DEVICE_PATH_PROTOCOL *Src1,\r | |
420 | IN EFI_DEVICE_PATH_PROTOCOL *Node\r | |
421 | )\r | |
422 | /*++\r | |
423 | \r | |
424 | Routine Description:\r | |
425 | Function is used to append a device path node to the end of another device path.\r | |
426 | \r | |
427 | Arguments:\r | |
428 | Src1 - A pointer to a device path data structure.\r | |
429 | \r | |
430 | Node - A pointer to a device path data structure.\r | |
431 | \r | |
432 | Returns:\r | |
433 | This function returns a pointer to the new device path.\r | |
434 | If there is not enough temporary pool memory available to complete this function,\r | |
435 | then NULL is returned.\r | |
436 | \r | |
437 | \r | |
438 | --*/\r | |
439 | {\r | |
440 | EFI_DEVICE_PATH_PROTOCOL *Temp;\r | |
441 | EFI_DEVICE_PATH_PROTOCOL *NextNode;\r | |
442 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r | |
443 | UINTN NodeLength;\r | |
444 | \r | |
445 | //\r | |
446 | // Build a Node that has a terminator on it\r | |
447 | //\r | |
448 | NodeLength = DevicePathNodeLength (Node);\r | |
449 | \r | |
450 | Temp = InternalAllocateCopyPool (NodeLength + sizeof (EFI_DEVICE_PATH_PROTOCOL), Node);\r | |
451 | if (Temp == NULL) {\r | |
452 | return NULL;\r | |
453 | }\r | |
454 | \r | |
455 | //\r | |
456 | // Add and end device path node to convert Node to device path\r | |
457 | //\r | |
458 | NextNode = NextDevicePathNode (Temp);\r | |
459 | SetDevicePathEndNode (NextNode);\r | |
460 | \r | |
461 | //\r | |
462 | // Append device paths\r | |
463 | //\r | |
464 | NewDevicePath = RtEfiAppendDevicePath (Src1, Temp);\r | |
465 | gBS->FreePool (Temp);\r | |
466 | return NewDevicePath;\r | |
467 | }\r | |
468 | \r | |
469 | EFI_DEVICE_PATH_PROTOCOL *\r | |
470 | RtEfiFileDevicePath (\r | |
471 | IN EFI_HANDLE Device OPTIONAL,\r | |
472 | IN CHAR16 *FileName\r | |
473 | )\r | |
474 | /*++\r | |
475 | \r | |
476 | Routine Description:\r | |
477 | \r | |
478 | This function allocates a device path for a file and appends it to an existiong\r | |
479 | device path.\r | |
480 | \r | |
481 | Arguments:\r | |
482 | Device - A pointer to a device handle.\r | |
483 | \r | |
484 | FileName - A pointer to a Null-terminated Unicodestring.\r | |
485 | \r | |
486 | Returns:\r | |
487 | A device path contain the file name.\r | |
488 | \r | |
489 | --*/\r | |
490 | {\r | |
491 | UINTN Size;\r | |
492 | FILEPATH_DEVICE_PATH *FilePath;\r | |
493 | EFI_DEVICE_PATH_PROTOCOL *Eop;\r | |
494 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
495 | \r | |
496 | for (Size = 0; FileName[Size] != 0; Size++)\r | |
497 | ;\r | |
498 | Size = (Size + 1) * 2;\r | |
499 | \r | |
500 | FilePath = InternalAllocateZeroPool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + sizeof (EFI_DEVICE_PATH_PROTOCOL));\r | |
501 | \r | |
502 | DevicePath = NULL;\r | |
503 | \r | |
504 | if (FilePath != NULL) {\r | |
505 | \r | |
506 | //\r | |
507 | // Build a file path\r | |
508 | //\r | |
509 | FilePath->Header.Type = MEDIA_DEVICE_PATH;\r | |
510 | FilePath->Header.SubType = MEDIA_FILEPATH_DP;\r | |
511 | SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH);\r | |
512 | EfiCopyMem (FilePath->PathName, FileName, Size);\r | |
513 | Eop = NextDevicePathNode (&FilePath->Header);\r | |
514 | SetDevicePathEndNode (Eop);\r | |
515 | \r | |
516 | //\r | |
517 | // Append file path to device's device path\r | |
518 | //\r | |
519 | \r | |
520 | DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) FilePath;\r | |
521 | if (Device != NULL) {\r | |
522 | DevicePath = RtEfiAppendDevicePath (\r | |
523 | RtEfiDevicePathFromHandle (Device),\r | |
524 | DevicePath\r | |
525 | );\r | |
526 | \r | |
527 | gBS->FreePool (FilePath);\r | |
528 | }\r | |
529 | }\r | |
530 | \r | |
531 | return DevicePath;\r | |
532 | }\r | |
533 | \r | |
534 | EFI_DEVICE_PATH_PROTOCOL *\r | |
535 | RtEfiAppendDevicePathInstance (\r | |
536 | IN EFI_DEVICE_PATH_PROTOCOL *Src,\r | |
537 | IN EFI_DEVICE_PATH_PROTOCOL *Instance\r | |
538 | )\r | |
539 | /*++\r | |
540 | \r | |
541 | Routine Description:\r | |
542 | \r | |
543 | Append a device path instance to another.\r | |
544 | \r | |
545 | Arguments:\r | |
546 | \r | |
547 | Src - The device path instance to be appended with.\r | |
548 | Instance - The device path instance appending the other.\r | |
549 | \r | |
550 | Returns:\r | |
551 | \r | |
552 | The contaction of these two.\r | |
553 | \r | |
554 | --*/\r | |
555 | {\r | |
556 | UINT8 *Ptr;\r | |
557 | EFI_DEVICE_PATH_PROTOCOL *DevPath;\r | |
558 | UINTN SrcSize;\r | |
559 | UINTN InstanceSize;\r | |
560 | \r | |
561 | if (Src == NULL) {\r | |
562 | return RtEfiDuplicateDevicePath (Instance);\r | |
563 | }\r | |
564 | \r | |
565 | SrcSize = RtEfiDevicePathSize (Src);\r | |
566 | InstanceSize = RtEfiDevicePathSize (Instance);\r | |
567 | \r | |
568 | Ptr = InternalAllocateCopyPool (SrcSize + InstanceSize, Src);\r | |
569 | if (Ptr != NULL) {\r | |
570 | \r | |
571 | DevPath = (EFI_DEVICE_PATH_PROTOCOL *) Ptr;\r | |
572 | \r | |
573 | while (!IsDevicePathEnd (DevPath)) {\r | |
574 | DevPath = NextDevicePathNode (DevPath);\r | |
575 | }\r | |
576 | //\r | |
577 | // Convert the End to an End Instance, since we are\r | |
578 | // appending another instacne after this one its a good\r | |
579 | // idea.\r | |
580 | //\r | |
581 | DevPath->SubType = END_INSTANCE_DEVICE_PATH_SUBTYPE;\r | |
582 | \r | |
583 | DevPath = NextDevicePathNode (DevPath);\r | |
584 | EfiCopyMem (DevPath, Instance, InstanceSize);\r | |
585 | }\r | |
586 | \r | |
587 | return (EFI_DEVICE_PATH_PROTOCOL *) Ptr;\r | |
588 | }\r | |
589 | \r | |
590 | VOID\r | |
591 | EFIAPI\r | |
592 | RtEfiInitializeFwVolDevicepathNode (\r | |
593 | IN MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvDevicePathNode,\r | |
594 | IN EFI_GUID *NameGuid\r | |
595 | )\r | |
596 | /*++\r | |
597 | \r | |
598 | Routine Description:\r | |
599 | \r | |
600 | Initialize a Firmware Volume (FV) Media Device Path node.\r | |
601 | \r | |
3eb9473e | 602 | Arguments:\r |
603 | \r | |
604 | FvDevicePathNode - Pointer to a FV device path node to initialize\r | |
605 | NameGuid - FV file name to use in FvDevicePathNode\r | |
606 | \r | |
607 | Returns:\r | |
608 | \r | |
609 | None\r | |
610 | \r | |
611 | --*/\r | |
612 | {\r | |
3eb9473e | 613 | FvDevicePathNode->Header.Type = MEDIA_DEVICE_PATH;\r |
614 | FvDevicePathNode->Header.SubType = MEDIA_FV_FILEPATH_DP;\r | |
615 | SetDevicePathNodeLength (&FvDevicePathNode->Header, sizeof (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH));\r | |
616 | \r | |
3eb9473e | 617 | EfiCopyMem (&FvDevicePathNode->NameGuid, NameGuid, sizeof(EFI_GUID));\r |
618 | }\r | |
619 | \r | |
620 | EFI_GUID *\r | |
621 | EFIAPI\r | |
622 | RtEfiGetNameGuidFromFwVolDevicePathNode (\r | |
623 | IN MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvDevicePathNode\r | |
624 | )\r | |
625 | /*++\r | |
626 | \r | |
627 | Routine Description:\r | |
628 | \r | |
629 | Check to see if the Firmware Volume (FV) Media Device Path is valid.\r | |
630 | \r | |
3eb9473e | 631 | Arguments:\r |
632 | \r | |
633 | FvDevicePathNode - Pointer to FV device path to check\r | |
634 | \r | |
635 | Returns:\r | |
636 | \r | |
637 | NULL - FvDevicePathNode is not valid.\r | |
638 | Other - FvDevicePathNode is valid and pointer to NameGuid was returned.\r | |
639 | \r | |
640 | --*/\r | |
641 | {\r | |
3eb9473e | 642 | if (DevicePathType (&FvDevicePathNode->Header) == MEDIA_DEVICE_PATH &&\r |
643 | DevicePathSubType (&FvDevicePathNode->Header) == MEDIA_FV_FILEPATH_DP) {\r | |
644 | return &FvDevicePathNode->NameGuid;\r | |
645 | }\r | |
646 | \r | |
3e99020d | 647 | return NULL;\r |
3eb9473e | 648 | }\r |
649 | \r |