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3dc8585e JY |
1 | /** @file\r |
2 | ACPI Sdt Protocol Driver\r | |
3 | \r | |
d1102dba | 4 | Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved. <BR>\r |
9d510e61 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
3dc8585e JY |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | //\r | |
10 | // Includes\r | |
11 | //\r | |
12 | #include "AcpiTable.h"\r | |
13 | \r | |
14 | GLOBAL_REMOVE_IF_UNREFERENCED\r | |
15 | EFI_ACPI_SDT_PROTOCOL mAcpiSdtProtocolTemplate = {\r | |
f9bbb8d9 | 16 | EFI_ACPI_TABLE_VERSION_NONE,\r |
3dc8585e JY |
17 | GetAcpiTable2,\r |
18 | RegisterNotify,\r | |
19 | Open,\r | |
20 | OpenSdt,\r | |
21 | Close,\r | |
22 | GetChild,\r | |
23 | GetOption,\r | |
24 | SetOption,\r | |
25 | FindPath\r | |
26 | };\r | |
27 | \r | |
28 | /**\r | |
29 | This function returns ACPI Table instance.\r | |
30 | \r | |
31 | @return AcpiTableInstance\r | |
32 | **/\r | |
33 | EFI_ACPI_TABLE_INSTANCE *\r | |
34 | SdtGetAcpiTableInstance (\r | |
35 | VOID\r | |
36 | )\r | |
37 | {\r | |
38 | return mPrivateData;\r | |
39 | }\r | |
40 | \r | |
41 | /**\r | |
42 | This function finds the table specified by the buffer.\r | |
43 | \r | |
44 | @param[in] Buffer Table buffer to find.\r | |
45 | \r | |
46 | @return ACPI table list.\r | |
47 | **/\r | |
48 | EFI_ACPI_TABLE_LIST *\r | |
49 | FindTableByBuffer (\r | |
50 | IN VOID *Buffer\r | |
51 | )\r | |
52 | {\r | |
53 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
54 | LIST_ENTRY *CurrentLink;\r | |
55 | EFI_ACPI_TABLE_LIST *CurrentTableList;\r | |
56 | LIST_ENTRY *StartLink;\r | |
57 | \r | |
58 | //\r | |
59 | // Get the instance of the ACPI Table\r | |
60 | //\r | |
61 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
62 | \r | |
63 | //\r | |
64 | // Find the notify\r | |
65 | //\r | |
66 | StartLink = &AcpiTableInstance->TableList;\r | |
67 | CurrentLink = StartLink->ForwardLink;\r | |
68 | \r | |
69 | while (CurrentLink != StartLink) {\r | |
70 | CurrentTableList = EFI_ACPI_TABLE_LIST_FROM_LINK (CurrentLink);\r | |
71 | if (((UINTN)CurrentTableList->PageAddress <= (UINTN)Buffer) &&\r | |
72 | ((UINTN)CurrentTableList->PageAddress + EFI_PAGES_TO_SIZE(CurrentTableList->NumberOfPages) > (UINTN)Buffer)) {\r | |
73 | //\r | |
74 | // Good! Found Table.\r | |
75 | //\r | |
76 | return CurrentTableList;\r | |
77 | }\r | |
78 | \r | |
79 | CurrentLink = CurrentLink->ForwardLink;\r | |
80 | }\r | |
81 | \r | |
82 | return NULL;\r | |
83 | }\r | |
84 | \r | |
85 | /**\r | |
86 | This function updates AML table checksum.\r | |
87 | It will search the ACPI table installed by ACPI_TABLE protocol.\r | |
88 | \r | |
89 | @param[in] Buffer A piece of AML code buffer pointer.\r | |
90 | \r | |
91 | @retval EFI_SUCCESS The table holds the AML buffer is found, and checksum is updated.\r | |
92 | @retval EFI_NOT_FOUND The table holds the AML buffer is not found.\r | |
93 | **/\r | |
94 | EFI_STATUS\r | |
95 | SdtUpdateAmlChecksum (\r | |
96 | IN VOID *Buffer\r | |
97 | )\r | |
98 | {\r | |
99 | EFI_ACPI_TABLE_LIST *CurrentTableList;\r | |
100 | \r | |
101 | CurrentTableList = FindTableByBuffer (Buffer);\r | |
102 | if (CurrentTableList == NULL) {\r | |
103 | return EFI_NOT_FOUND;\r | |
104 | }\r | |
105 | \r | |
106 | AcpiPlatformChecksum (\r | |
107 | (VOID *)CurrentTableList->Table,\r | |
108 | CurrentTableList->Table->Length,\r | |
109 | OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER, Checksum)\r | |
110 | );\r | |
111 | return EFI_SUCCESS;\r | |
112 | }\r | |
113 | \r | |
114 | /**\r | |
115 | This function finds MAX AML buffer size.\r | |
116 | It will search the ACPI table installed by ACPI_TABLE protocol.\r | |
117 | \r | |
118 | @param[in] Buffer A piece of AML code buffer pointer.\r | |
119 | @param[out] MaxSize On return it holds the MAX size of buffer.\r | |
120 | \r | |
121 | @retval EFI_SUCCESS The table holds the AML buffer is found, and MAX size if returned.\r | |
122 | @retval EFI_NOT_FOUND The table holds the AML buffer is not found.\r | |
123 | **/\r | |
124 | EFI_STATUS\r | |
125 | SdtGetMaxAmlBufferSize (\r | |
126 | IN VOID *Buffer,\r | |
127 | OUT UINTN *MaxSize\r | |
128 | )\r | |
129 | {\r | |
130 | EFI_ACPI_TABLE_LIST *CurrentTableList;\r | |
131 | \r | |
132 | CurrentTableList = FindTableByBuffer (Buffer);\r | |
133 | if (CurrentTableList == NULL) {\r | |
134 | return EFI_NOT_FOUND;\r | |
135 | }\r | |
136 | \r | |
137 | *MaxSize = (UINTN)CurrentTableList->Table + CurrentTableList->Table->Length - (UINTN)Buffer;\r | |
138 | return EFI_SUCCESS;\r | |
139 | }\r | |
140 | \r | |
141 | /**\r | |
142 | This function invokes ACPI notification.\r | |
143 | \r | |
144 | @param[in] AcpiTableInstance Instance to AcpiTable\r | |
145 | @param[in] Version Version(s) to set.\r | |
146 | @param[in] Handle Handle of the table.\r | |
147 | **/\r | |
148 | VOID\r | |
149 | SdtNotifyAcpiList (\r | |
150 | IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,\r | |
151 | IN EFI_ACPI_TABLE_VERSION Version,\r | |
152 | IN UINTN Handle\r | |
153 | )\r | |
154 | {\r | |
155 | EFI_ACPI_NOTIFY_LIST *CurrentNotifyList;\r | |
156 | LIST_ENTRY *CurrentLink;\r | |
157 | LIST_ENTRY *StartLink;\r | |
158 | EFI_ACPI_TABLE_LIST *Table;\r | |
159 | EFI_STATUS Status;\r | |
160 | \r | |
161 | //\r | |
162 | // We should not use Table buffer, because it is user input buffer.\r | |
163 | //\r | |
164 | Status = FindTableByHandle (\r | |
165 | Handle,\r | |
166 | &AcpiTableInstance->TableList,\r | |
167 | &Table\r | |
168 | );\r | |
169 | ASSERT_EFI_ERROR (Status);\r | |
170 | \r | |
171 | //\r | |
172 | // Find the notify\r | |
173 | //\r | |
174 | StartLink = &AcpiTableInstance->NotifyList;\r | |
175 | CurrentLink = StartLink->ForwardLink;\r | |
176 | \r | |
177 | while (CurrentLink != StartLink) {\r | |
178 | CurrentNotifyList = EFI_ACPI_NOTIFY_LIST_FROM_LINK (CurrentLink);\r | |
179 | \r | |
180 | //\r | |
181 | // Inovke notification\r | |
182 | //\r | |
183 | CurrentNotifyList->Notification ((EFI_ACPI_SDT_HEADER *)Table->Table, Version, Handle);\r | |
184 | \r | |
185 | CurrentLink = CurrentLink->ForwardLink;\r | |
186 | }\r | |
187 | \r | |
188 | return ;\r | |
189 | }\r | |
190 | \r | |
191 | /**\r | |
192 | Returns a requested ACPI table.\r | |
d1102dba | 193 | \r |
3dc8585e JY |
194 | The GetAcpiTable() function returns a pointer to a buffer containing the ACPI table associated\r |
195 | with the Index that was input. The following structures are not considered elements in the list of\r | |
196 | ACPI tables:\r | |
197 | - Root System Description Pointer (RSD_PTR)\r | |
198 | - Root System Description Table (RSDT)\r | |
199 | - Extended System Description Table (XSDT)\r | |
200 | Version is updated with a bit map containing all the versions of ACPI of which the table is a\r | |
f0071740 SZ |
201 | member. For tables installed via the EFI_ACPI_TABLE_PROTOCOL.InstallAcpiTable() interface,\r |
202 | the function returns the value of EFI_ACPI_STD_PROTOCOL.AcpiVersion.\r | |
d1102dba | 203 | \r |
3dc8585e JY |
204 | @param[in] Index The zero-based index of the table to retrieve.\r |
205 | @param[out] Table Pointer for returning the table buffer.\r | |
206 | @param[out] Version On return, updated with the ACPI versions to which this table belongs. Type\r | |
207 | EFI_ACPI_TABLE_VERSION is defined in "Related Definitions" in the\r | |
d1102dba | 208 | EFI_ACPI_SDT_PROTOCOL.\r |
f0071740 SZ |
209 | @param[out] TableKey On return, points to the table key for the specified ACPI system definition table.\r |
210 | This is identical to the table key used in the EFI_ACPI_TABLE_PROTOCOL.\r | |
211 | The TableKey can be passed to EFI_ACPI_TABLE_PROTOCOL.UninstallAcpiTable()\r | |
212 | to uninstall the table.\r | |
3dc8585e | 213 | @retval EFI_SUCCESS The function completed successfully.\r |
d1102dba LG |
214 | @retval EFI_NOT_FOUND The requested index is too large and a table was not found.\r |
215 | **/\r | |
3dc8585e JY |
216 | EFI_STATUS\r |
217 | EFIAPI\r | |
218 | GetAcpiTable2 (\r | |
219 | IN UINTN Index,\r | |
220 | OUT EFI_ACPI_SDT_HEADER **Table,\r | |
221 | OUT EFI_ACPI_TABLE_VERSION *Version,\r | |
222 | OUT UINTN *TableKey\r | |
223 | )\r | |
224 | {\r | |
225 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
226 | UINTN TableIndex;\r | |
227 | LIST_ENTRY *CurrentLink;\r | |
228 | LIST_ENTRY *StartLink;\r | |
229 | EFI_ACPI_TABLE_LIST *CurrentTable;\r | |
230 | \r | |
231 | ASSERT (Table != NULL);\r | |
232 | ASSERT (Version != NULL);\r | |
233 | ASSERT (TableKey != NULL);\r | |
234 | \r | |
235 | //\r | |
236 | // Get the instance of the ACPI Table\r | |
237 | //\r | |
238 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
239 | \r | |
240 | //\r | |
241 | // Find the table\r | |
242 | //\r | |
243 | StartLink = &AcpiTableInstance->TableList;\r | |
244 | CurrentLink = StartLink->ForwardLink;\r | |
245 | TableIndex = 0;\r | |
246 | \r | |
247 | while (CurrentLink != StartLink) {\r | |
248 | if (TableIndex == Index) {\r | |
249 | break;\r | |
250 | }\r | |
251 | //\r | |
252 | // Next one\r | |
253 | //\r | |
254 | CurrentLink = CurrentLink->ForwardLink;\r | |
255 | TableIndex ++;\r | |
256 | }\r | |
257 | \r | |
258 | if ((TableIndex != Index) || (CurrentLink == StartLink)) {\r | |
259 | return EFI_NOT_FOUND;\r | |
260 | }\r | |
261 | \r | |
262 | //\r | |
263 | // Get handle and version\r | |
264 | //\r | |
265 | CurrentTable = EFI_ACPI_TABLE_LIST_FROM_LINK (CurrentLink);\r | |
266 | *TableKey = CurrentTable->Handle;\r | |
267 | *Version = CurrentTable->Version;\r | |
268 | *Table = (EFI_ACPI_SDT_HEADER *)CurrentTable->Table;\r | |
269 | \r | |
270 | return EFI_SUCCESS;\r | |
271 | }\r | |
272 | \r | |
273 | /**\r | |
274 | Register a callback when an ACPI table is installed.\r | |
d1102dba | 275 | \r |
3dc8585e | 276 | This function registers a function which will be called whenever a new ACPI table is installed.\r |
d1102dba | 277 | \r |
3dc8585e JY |
278 | @param[in] Notification Points to the callback function to be registered\r |
279 | **/\r | |
280 | VOID\r | |
281 | SdtRegisterNotify (\r | |
282 | IN EFI_ACPI_NOTIFICATION_FN Notification\r | |
283 | )\r | |
284 | {\r | |
285 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
286 | EFI_ACPI_NOTIFY_LIST *CurrentNotifyList;\r | |
287 | \r | |
288 | //\r | |
289 | // Get the instance of the ACPI Table\r | |
290 | //\r | |
291 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
292 | \r | |
293 | //\r | |
294 | // Create a new list entry\r | |
295 | //\r | |
296 | CurrentNotifyList = AllocatePool (sizeof (EFI_ACPI_NOTIFY_LIST));\r | |
297 | ASSERT (CurrentNotifyList != NULL);\r | |
298 | \r | |
299 | //\r | |
300 | // Initialize the table contents\r | |
301 | //\r | |
302 | CurrentNotifyList->Signature = EFI_ACPI_NOTIFY_LIST_SIGNATURE;\r | |
303 | CurrentNotifyList->Notification = Notification;\r | |
304 | \r | |
305 | //\r | |
306 | // Add the table to the current list of tables\r | |
307 | //\r | |
308 | InsertTailList (&AcpiTableInstance->NotifyList, &CurrentNotifyList->Link);\r | |
309 | \r | |
310 | return ;\r | |
311 | }\r | |
312 | \r | |
313 | /**\r | |
314 | Unregister a callback when an ACPI table is installed.\r | |
d1102dba | 315 | \r |
3dc8585e | 316 | This function unregisters a function which will be called whenever a new ACPI table is installed.\r |
d1102dba | 317 | \r |
3dc8585e | 318 | @param[in] Notification Points to the callback function to be unregistered.\r |
d1102dba | 319 | \r |
3dc8585e | 320 | @retval EFI_SUCCESS Callback successfully unregistered.\r |
d1102dba | 321 | @retval EFI_INVALID_PARAMETER Notification does not match a known registration function.\r |
3dc8585e JY |
322 | **/\r |
323 | EFI_STATUS\r | |
324 | SdtUnregisterNotify (\r | |
325 | IN EFI_ACPI_NOTIFICATION_FN Notification\r | |
326 | )\r | |
327 | {\r | |
328 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
329 | EFI_ACPI_NOTIFY_LIST *CurrentNotifyList;\r | |
330 | LIST_ENTRY *CurrentLink;\r | |
331 | LIST_ENTRY *StartLink;\r | |
332 | \r | |
333 | //\r | |
334 | // Get the instance of the ACPI Table\r | |
335 | //\r | |
336 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
337 | \r | |
338 | //\r | |
339 | // Find the notify\r | |
340 | //\r | |
341 | StartLink = &AcpiTableInstance->NotifyList;\r | |
342 | CurrentLink = StartLink->ForwardLink;\r | |
343 | \r | |
344 | while (CurrentLink != StartLink) {\r | |
345 | CurrentNotifyList = EFI_ACPI_NOTIFY_LIST_FROM_LINK (CurrentLink);\r | |
346 | if (CurrentNotifyList->Notification == Notification) {\r | |
347 | //\r | |
348 | // Good! Found notification.\r | |
349 | //\r | |
350 | // Remove it from list and free the node.\r | |
351 | //\r | |
352 | RemoveEntryList (&(CurrentNotifyList->Link));\r | |
353 | FreePool (CurrentNotifyList);\r | |
354 | return EFI_SUCCESS;\r | |
355 | }\r | |
356 | \r | |
357 | CurrentLink = CurrentLink->ForwardLink;\r | |
358 | }\r | |
359 | \r | |
360 | //\r | |
361 | // Not found!\r | |
362 | //\r | |
363 | return EFI_INVALID_PARAMETER;\r | |
364 | }\r | |
365 | \r | |
366 | /**\r | |
367 | Register or unregister a callback when an ACPI table is installed.\r | |
d1102dba | 368 | \r |
3dc8585e JY |
369 | This function registers or unregisters a function which will be called whenever a new ACPI table is\r |
370 | installed.\r | |
d1102dba | 371 | \r |
3dc8585e JY |
372 | @param[in] Register If TRUE, then the specified function will be registered. If FALSE, then the specified\r |
373 | function will be unregistered.\r | |
374 | @param[in] Notification Points to the callback function to be registered or unregistered.\r | |
d1102dba | 375 | \r |
3dc8585e JY |
376 | @retval EFI_SUCCESS Callback successfully registered or unregistered.\r |
377 | @retval EFI_INVALID_PARAMETER Notification is NULL\r | |
d1102dba | 378 | @retval EFI_INVALID_PARAMETER Register is FALSE and Notification does not match a known registration function.\r |
3dc8585e JY |
379 | **/\r |
380 | EFI_STATUS\r | |
381 | EFIAPI\r | |
382 | RegisterNotify (\r | |
383 | IN BOOLEAN Register,\r | |
384 | IN EFI_ACPI_NOTIFICATION_FN Notification\r | |
385 | )\r | |
386 | {\r | |
387 | //\r | |
388 | // Check for invalid input parameters\r | |
389 | //\r | |
390 | if (Notification == NULL) {\r | |
391 | return EFI_INVALID_PARAMETER;\r | |
392 | }\r | |
393 | \r | |
394 | if (Register) {\r | |
395 | //\r | |
396 | // Register a new notify\r | |
397 | //\r | |
398 | SdtRegisterNotify (Notification);\r | |
399 | return EFI_SUCCESS;\r | |
400 | } else {\r | |
401 | //\r | |
402 | // Unregister an old notify\r | |
403 | //\r | |
404 | return SdtUnregisterNotify (Notification);\r | |
405 | }\r | |
406 | }\r | |
407 | \r | |
408 | /**\r | |
409 | Create a handle for the first ACPI opcode in an ACPI system description table.\r | |
d1102dba | 410 | \r |
3dc8585e JY |
411 | @param[in] TableKey The table key for the ACPI table, as returned by GetTable().\r |
412 | @param[out] Handle On return, points to the newly created ACPI handle.\r | |
413 | \r | |
414 | @retval EFI_SUCCESS Handle created successfully.\r | |
d1102dba | 415 | @retval EFI_NOT_FOUND TableKey does not refer to a valid ACPI table.\r |
3dc8585e JY |
416 | **/\r |
417 | EFI_STATUS\r | |
418 | SdtOpenSdtTable (\r | |
419 | IN UINTN TableKey,\r | |
420 | OUT EFI_ACPI_HANDLE *Handle\r | |
421 | )\r | |
422 | {\r | |
423 | EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;\r | |
424 | EFI_STATUS Status;\r | |
425 | EFI_ACPI_TABLE_LIST *Table;\r | |
426 | EFI_AML_HANDLE *AmlHandle;\r | |
427 | \r | |
428 | //\r | |
429 | // Get the instance of the ACPI Table\r | |
430 | //\r | |
431 | AcpiTableInstance = SdtGetAcpiTableInstance ();\r | |
432 | \r | |
433 | //\r | |
434 | // Find the table\r | |
435 | //\r | |
436 | Status = FindTableByHandle (\r | |
437 | TableKey,\r | |
438 | &AcpiTableInstance->TableList,\r | |
439 | &Table\r | |
440 | );\r | |
441 | if (EFI_ERROR (Status)) {\r | |
442 | return EFI_NOT_FOUND;\r | |
443 | }\r | |
444 | \r | |
445 | AmlHandle = AllocatePool (sizeof(*AmlHandle));\r | |
446 | ASSERT (AmlHandle != NULL);\r | |
447 | AmlHandle->Signature = EFI_AML_ROOT_HANDLE_SIGNATURE;\r | |
448 | AmlHandle->Buffer = (VOID *)((UINTN)Table->Table + sizeof(EFI_ACPI_SDT_HEADER));\r | |
449 | AmlHandle->Size = Table->Table->Length - sizeof(EFI_ACPI_SDT_HEADER);\r | |
450 | AmlHandle->AmlByteEncoding = NULL;\r | |
451 | AmlHandle->Modified = FALSE;\r | |
452 | \r | |
453 | //\r | |
454 | // return the ACPI handle\r | |
455 | //\r | |
456 | *Handle = (EFI_ACPI_HANDLE)AmlHandle;\r | |
457 | \r | |
458 | return EFI_SUCCESS;\r | |
459 | }\r | |
460 | \r | |
461 | /**\r | |
462 | Create a handle for the first ACPI opcode in an ACPI system description table.\r | |
d1102dba | 463 | \r |
3dc8585e JY |
464 | @param[in] TableKey The table key for the ACPI table, as returned by GetTable().\r |
465 | @param[out] Handle On return, points to the newly created ACPI handle.\r | |
466 | \r | |
467 | @retval EFI_SUCCESS Handle created successfully.\r | |
d1102dba | 468 | @retval EFI_NOT_FOUND TableKey does not refer to a valid ACPI table.\r |
3dc8585e JY |
469 | **/\r |
470 | EFI_STATUS\r | |
471 | EFIAPI\r | |
472 | OpenSdt (\r | |
473 | IN UINTN TableKey,\r | |
474 | OUT EFI_ACPI_HANDLE *Handle\r | |
475 | )\r | |
476 | {\r | |
477 | if (Handle == NULL) {\r | |
478 | return EFI_INVALID_PARAMETER;\r | |
479 | }\r | |
480 | \r | |
481 | return SdtOpenSdtTable (TableKey, Handle);\r | |
482 | }\r | |
483 | \r | |
484 | /**\r | |
485 | Create a handle from an ACPI opcode\r | |
d1102dba | 486 | \r |
3dc8585e JY |
487 | @param[in] Buffer Points to the ACPI opcode.\r |
488 | @param[in] BufferSize Max buffer size.\r | |
489 | @param[out] Handle Upon return, holds the handle.\r | |
d1102dba | 490 | \r |
3dc8585e JY |
491 | @retval EFI_SUCCESS Success\r |
492 | @retval EFI_INVALID_PARAMETER Buffer is NULL or Handle is NULL or Buffer points to an\r | |
493 | invalid opcode.\r | |
d1102dba | 494 | \r |
3dc8585e JY |
495 | **/\r |
496 | EFI_STATUS\r | |
497 | SdtOpenEx (\r | |
498 | IN VOID *Buffer,\r | |
499 | IN UINTN BufferSize,\r | |
d1102dba | 500 | OUT EFI_ACPI_HANDLE *Handle\r |
3dc8585e JY |
501 | )\r |
502 | {\r | |
503 | AML_BYTE_ENCODING *AmlByteEncoding;\r | |
504 | EFI_AML_HANDLE *AmlHandle;\r | |
505 | \r | |
506 | AmlByteEncoding = AmlSearchByOpByte (Buffer);\r | |
507 | if (AmlByteEncoding == NULL) {\r | |
508 | return EFI_INVALID_PARAMETER;\r | |
509 | }\r | |
510 | \r | |
511 | //\r | |
512 | // Do not open NameString as handle\r | |
513 | //\r | |
514 | if ((AmlByteEncoding->Attribute & AML_IS_NAME_CHAR) != 0) {\r | |
515 | return EFI_INVALID_PARAMETER;\r | |
516 | }\r | |
517 | \r | |
518 | //\r | |
519 | // Good, find it\r | |
520 | //\r | |
521 | AmlHandle = AllocatePool (sizeof(*AmlHandle));\r | |
522 | ASSERT (AmlHandle != NULL);\r | |
d1102dba | 523 | \r |
3dc8585e JY |
524 | AmlHandle->Signature = EFI_AML_HANDLE_SIGNATURE;\r |
525 | AmlHandle->Buffer = Buffer;\r | |
526 | AmlHandle->AmlByteEncoding = AmlByteEncoding;\r | |
527 | AmlHandle->Modified = FALSE;\r | |
528 | \r | |
529 | AmlHandle->Size = AmlGetObjectSize (AmlByteEncoding, Buffer, BufferSize);\r | |
530 | if (AmlHandle->Size == 0) {\r | |
531 | FreePool (AmlHandle);\r | |
532 | return EFI_INVALID_PARAMETER;\r | |
533 | }\r | |
534 | \r | |
535 | *Handle = (EFI_ACPI_HANDLE)AmlHandle;\r | |
536 | \r | |
537 | return EFI_SUCCESS;\r | |
538 | }\r | |
539 | \r | |
540 | /**\r | |
541 | Create a handle from an ACPI opcode\r | |
d1102dba | 542 | \r |
3dc8585e JY |
543 | @param[in] Buffer Points to the ACPI opcode.\r |
544 | @param[out] Handle Upon return, holds the handle.\r | |
d1102dba | 545 | \r |
3dc8585e JY |
546 | @retval EFI_SUCCESS Success\r |
547 | @retval EFI_INVALID_PARAMETER Buffer is NULL or Handle is NULL or Buffer points to an\r | |
548 | invalid opcode.\r | |
d1102dba | 549 | \r |
3dc8585e JY |
550 | **/\r |
551 | EFI_STATUS\r | |
552 | EFIAPI\r | |
553 | Open (\r | |
554 | IN VOID *Buffer,\r | |
d1102dba | 555 | OUT EFI_ACPI_HANDLE *Handle\r |
3dc8585e JY |
556 | )\r |
557 | {\r | |
558 | EFI_STATUS Status;\r | |
559 | UINTN MaxSize;\r | |
560 | \r | |
a6bb62e4 | 561 | MaxSize = 0;\r |
562 | \r | |
3dc8585e JY |
563 | //\r |
564 | // Check for invalid input parameters\r | |
565 | //\r | |
566 | if (Buffer == NULL || Handle == NULL) {\r | |
567 | return EFI_INVALID_PARAMETER;\r | |
568 | }\r | |
569 | \r | |
570 | Status = SdtGetMaxAmlBufferSize (Buffer, &MaxSize);\r | |
571 | if (EFI_ERROR (Status)) {\r | |
572 | return EFI_INVALID_PARAMETER;\r | |
573 | }\r | |
574 | \r | |
575 | return SdtOpenEx (Buffer, MaxSize, Handle);\r | |
576 | }\r | |
577 | \r | |
578 | /**\r | |
579 | Close an ACPI handle.\r | |
d1102dba | 580 | \r |
3dc8585e | 581 | @param[in] Handle Returns the handle.\r |
d1102dba | 582 | \r |
3dc8585e | 583 | @retval EFI_SUCCESS Success\r |
d1102dba | 584 | @retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.\r |
3dc8585e JY |
585 | **/\r |
586 | EFI_STATUS\r | |
587 | EFIAPI\r | |
588 | Close (\r | |
589 | IN EFI_ACPI_HANDLE Handle\r | |
590 | )\r | |
591 | {\r | |
592 | EFI_AML_HANDLE *AmlHandle;\r | |
593 | EFI_STATUS Status;\r | |
594 | \r | |
595 | //\r | |
596 | // Check for invalid input parameters\r | |
597 | //\r | |
598 | if (Handle == NULL) {\r | |
599 | return EFI_INVALID_PARAMETER;\r | |
600 | }\r | |
601 | \r | |
602 | AmlHandle = (EFI_AML_HANDLE *)Handle;\r | |
603 | if ((AmlHandle->Signature != EFI_AML_ROOT_HANDLE_SIGNATURE) &&\r | |
604 | (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE)) {\r | |
605 | return EFI_INVALID_PARAMETER;\r | |
606 | }\r | |
607 | \r | |
608 | //\r | |
609 | // Update Checksum only if modified\r | |
610 | //\r | |
611 | if (AmlHandle->Modified) {\r | |
612 | Status = SdtUpdateAmlChecksum (AmlHandle->Buffer);\r | |
613 | if (EFI_ERROR (Status)) {\r | |
614 | return EFI_INVALID_PARAMETER;\r | |
615 | }\r | |
616 | }\r | |
617 | \r | |
618 | FreePool (AmlHandle);\r | |
619 | \r | |
620 | return EFI_SUCCESS;\r | |
621 | }\r | |
622 | \r | |
623 | /**\r | |
624 | Retrieve information about an ACPI object.\r | |
d1102dba | 625 | \r |
3dc8585e JY |
626 | @param[in] Handle ACPI object handle.\r |
627 | @param[in] Index Index of the data to retrieve from the object. In general, indexes read from left-to-right\r | |
628 | in the ACPI encoding, with index 0 always being the ACPI opcode.\r | |
629 | @param[out] DataType Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists\r | |
630 | for the specified index.\r | |
631 | @param[out] Data Upon return, points to the pointer to the data.\r | |
632 | @param[out] DataSize Upon return, points to the size of Data.\r | |
d1102dba | 633 | \r |
3dc8585e JY |
634 | @retval EFI_SUCCESS Success.\r |
635 | @retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.\r | |
636 | **/\r | |
637 | EFI_STATUS\r | |
638 | EFIAPI\r | |
639 | GetOption (\r | |
640 | IN EFI_ACPI_HANDLE Handle,\r | |
641 | IN UINTN Index,\r | |
642 | OUT EFI_ACPI_DATA_TYPE *DataType,\r | |
643 | OUT CONST VOID **Data,\r | |
644 | OUT UINTN *DataSize\r | |
645 | )\r | |
646 | {\r | |
647 | EFI_AML_HANDLE *AmlHandle;\r | |
648 | AML_BYTE_ENCODING *AmlByteEncoding;\r | |
649 | EFI_STATUS Status;\r | |
650 | \r | |
651 | ASSERT (DataType != NULL);\r | |
652 | ASSERT (Data != NULL);\r | |
653 | ASSERT (DataSize != NULL);\r | |
654 | \r | |
655 | //\r | |
656 | // Check for invalid input parameters\r | |
657 | //\r | |
658 | if (Handle == NULL) {\r | |
659 | return EFI_INVALID_PARAMETER;\r | |
660 | }\r | |
661 | \r | |
662 | AmlHandle = (EFI_AML_HANDLE *)Handle;\r | |
663 | //\r | |
664 | // Do not check EFI_AML_ROOT_HANDLE_SIGNATURE because there is no option for Root handle\r | |
665 | //\r | |
666 | if (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE) {\r | |
667 | return EFI_INVALID_PARAMETER;\r | |
668 | }\r | |
669 | \r | |
670 | AmlByteEncoding = AmlHandle->AmlByteEncoding;\r | |
671 | if (Index > AmlByteEncoding->MaxIndex) {\r | |
672 | *DataType = EFI_ACPI_DATA_TYPE_NONE;\r | |
673 | return EFI_SUCCESS;\r | |
674 | }\r | |
675 | \r | |
676 | //\r | |
677 | // Parse option\r | |
678 | //\r | |
679 | Status = AmlParseOptionHandleCommon (AmlHandle, (AML_OP_PARSE_INDEX)Index, DataType, (VOID **)Data, DataSize);\r | |
680 | if (EFI_ERROR (Status)) {\r | |
681 | return EFI_INVALID_PARAMETER;\r | |
682 | }\r | |
683 | \r | |
684 | return EFI_SUCCESS;\r | |
685 | }\r | |
686 | \r | |
687 | /**\r | |
688 | Change information about an ACPI object.\r | |
d1102dba | 689 | \r |
3dc8585e JY |
690 | @param[in] Handle ACPI object handle.\r |
691 | @param[in] Index Index of the data to retrieve from the object. In general, indexes read from left-to-right\r | |
692 | in the ACPI encoding, with index 0 always being the ACPI opcode.\r | |
693 | @param[in] Data Points to the data.\r | |
694 | @param[in] DataSize The size of the Data.\r | |
695 | \r | |
696 | @retval EFI_SUCCESS Success\r | |
697 | @retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.\r | |
698 | @retval EFI_BAD_BUFFER_SIZE Data cannot be accommodated in the space occupied by\r | |
699 | the option.\r | |
700 | \r | |
701 | **/\r | |
702 | EFI_STATUS\r | |
703 | EFIAPI\r | |
704 | SetOption (\r | |
705 | IN EFI_ACPI_HANDLE Handle,\r | |
706 | IN UINTN Index,\r | |
707 | IN CONST VOID *Data,\r | |
708 | IN UINTN DataSize\r | |
709 | )\r | |
710 | {\r | |
711 | EFI_AML_HANDLE *AmlHandle;\r | |
712 | AML_BYTE_ENCODING *AmlByteEncoding;\r | |
713 | EFI_STATUS Status;\r | |
714 | EFI_ACPI_DATA_TYPE DataType;\r | |
715 | VOID *OrgData;\r | |
716 | UINTN OrgDataSize;\r | |
717 | \r | |
718 | ASSERT (Data != NULL);\r | |
719 | \r | |
720 | //\r | |
721 | // Check for invalid input parameters\r | |
722 | //\r | |
723 | if (Handle == NULL) {\r | |
724 | return EFI_INVALID_PARAMETER;\r | |
725 | }\r | |
726 | \r | |
727 | AmlHandle = (EFI_AML_HANDLE *)Handle;\r | |
728 | //\r | |
729 | // Do not check EFI_AML_ROOT_HANDLE_SIGNATURE because there is no option for Root handle\r | |
730 | //\r | |
731 | if (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE) {\r | |
732 | return EFI_INVALID_PARAMETER;\r | |
733 | }\r | |
734 | AmlByteEncoding = AmlHandle->AmlByteEncoding;\r | |
735 | \r | |
736 | if (Index > AmlByteEncoding->MaxIndex) {\r | |
737 | return EFI_INVALID_PARAMETER;\r | |
738 | }\r | |
739 | \r | |
740 | //\r | |
741 | // Parse option\r | |
742 | //\r | |
743 | Status = AmlParseOptionHandleCommon (AmlHandle, (AML_OP_PARSE_INDEX)Index, &DataType, &OrgData, &OrgDataSize);\r | |
744 | if (EFI_ERROR (Status)) {\r | |
745 | return EFI_INVALID_PARAMETER;\r | |
746 | }\r | |
747 | if (DataType == EFI_ACPI_DATA_TYPE_NONE) {\r | |
748 | return EFI_INVALID_PARAMETER;\r | |
749 | }\r | |
750 | \r | |
751 | if (DataSize > OrgDataSize) {\r | |
752 | return EFI_BAD_BUFFER_SIZE;\r | |
753 | }\r | |
754 | \r | |
755 | //\r | |
756 | // Update\r | |
757 | //\r | |
758 | CopyMem (OrgData, Data, DataSize);\r | |
759 | AmlHandle->Modified = TRUE;\r | |
760 | \r | |
761 | return EFI_SUCCESS;\r | |
762 | }\r | |
763 | \r | |
764 | /**\r | |
765 | Return the child ACPI objects.\r | |
d1102dba | 766 | \r |
3dc8585e JY |
767 | @param[in] ParentHandle Parent handle.\r |
768 | @param[in, out] Handle On entry, points to the previously returned handle or NULL to start with the first\r | |
769 | handle. On return, points to the next returned ACPI handle or NULL if there are no\r | |
770 | child objects.\r | |
771 | \r | |
772 | @retval EFI_SUCCESS Success\r | |
d1102dba | 773 | @retval EFI_INVALID_PARAMETER ParentHandle is NULL or does not refer to a valid ACPI object.\r |
3dc8585e JY |
774 | **/\r |
775 | EFI_STATUS\r | |
776 | EFIAPI\r | |
777 | GetChild (\r | |
778 | IN EFI_ACPI_HANDLE ParentHandle,\r | |
779 | IN OUT EFI_ACPI_HANDLE *Handle\r | |
780 | )\r | |
781 | {\r | |
782 | EFI_AML_HANDLE *AmlParentHandle;\r | |
783 | EFI_AML_HANDLE *AmlHandle;\r | |
784 | VOID *Buffer;\r | |
785 | EFI_STATUS Status;\r | |
786 | \r | |
787 | ASSERT (Handle != NULL);\r | |
788 | \r | |
789 | //\r | |
790 | // Check for invalid input parameters\r | |
791 | //\r | |
792 | if (ParentHandle == NULL) {\r | |
793 | return EFI_INVALID_PARAMETER;\r | |
794 | }\r | |
795 | \r | |
796 | AmlHandle = *Handle;\r | |
797 | if ((AmlHandle != NULL) && (AmlHandle->Signature != EFI_AML_HANDLE_SIGNATURE)) {\r | |
798 | return EFI_INVALID_PARAMETER;\r | |
799 | }\r | |
800 | \r | |
801 | AmlParentHandle = (EFI_AML_HANDLE *)ParentHandle;\r | |
802 | if (AmlParentHandle->Signature == EFI_AML_ROOT_HANDLE_SIGNATURE) {\r | |
803 | //\r | |
804 | // Root handle\r | |
805 | //\r | |
806 | Status = AmlGetChildFromRoot (AmlParentHandle, AmlHandle, &Buffer);\r | |
807 | } else if (AmlParentHandle->Signature == EFI_AML_HANDLE_SIGNATURE) {\r | |
808 | //\r | |
809 | // Non-root handle\r | |
810 | //\r | |
811 | Status = AmlGetChildFromNonRoot (AmlParentHandle, AmlHandle, &Buffer);\r | |
812 | } else {\r | |
813 | //\r | |
814 | // Invalid\r | |
815 | //\r | |
816 | return EFI_INVALID_PARAMETER;\r | |
817 | }\r | |
818 | \r | |
819 | if (EFI_ERROR (Status)) {\r | |
820 | return EFI_INVALID_PARAMETER;\r | |
821 | }\r | |
822 | if (Buffer == NULL) {\r | |
823 | *Handle = NULL;\r | |
824 | return EFI_SUCCESS;\r | |
825 | }\r | |
826 | return SdtOpenEx (Buffer, (UINTN)AmlParentHandle->Buffer + AmlParentHandle->Size - (UINTN)Buffer, Handle);\r | |
827 | }\r | |
828 | \r | |
829 | /**\r | |
830 | Returns the handle of the ACPI object representing the specified ACPI path\r | |
d1102dba | 831 | \r |
3dc8585e JY |
832 | @param[in] HandleIn Points to the handle of the object representing the starting point for the path search.\r |
833 | @param[in] AmlPath Points to the AML path.\r | |
834 | @param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to\r | |
835 | HandleIn.\r | |
d1102dba | 836 | \r |
3dc8585e | 837 | @retval EFI_SUCCESS Success\r |
d1102dba | 838 | @retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object.\r |
3dc8585e JY |
839 | **/\r |
840 | EFI_STATUS\r | |
841 | SdtFindPathFromNonRoot (\r | |
842 | IN EFI_ACPI_HANDLE HandleIn,\r | |
843 | IN UINT8 *AmlPath,\r | |
844 | OUT EFI_ACPI_HANDLE *HandleOut\r | |
845 | )\r | |
846 | {\r | |
847 | EFI_AML_HANDLE *AmlHandle;\r | |
848 | VOID *Buffer;\r | |
849 | EFI_STATUS Status;\r | |
850 | \r | |
4e1005ec | 851 | Buffer = NULL;\r |
3dc8585e JY |
852 | AmlHandle = (EFI_AML_HANDLE *)HandleIn;\r |
853 | \r | |
854 | //\r | |
855 | // For non-root handle, we need search from THIS node instead of ROOT.\r | |
856 | //\r | |
857 | Status = AmlFindPath (AmlHandle, AmlPath, &Buffer, FALSE);\r | |
858 | if (EFI_ERROR (Status)) {\r | |
859 | return EFI_INVALID_PARAMETER;\r | |
860 | }\r | |
861 | if (Buffer == NULL) {\r | |
862 | *HandleOut = NULL;\r | |
863 | return EFI_SUCCESS;\r | |
864 | }\r | |
865 | return SdtOpenEx (Buffer, (UINTN)AmlHandle->Buffer + AmlHandle->Size - (UINTN)Buffer, HandleOut);\r | |
866 | }\r | |
867 | \r | |
868 | /**\r | |
869 | Duplicate AML handle.\r | |
d1102dba | 870 | \r |
3dc8585e | 871 | @param[in] AmlHandle Handle to be duplicated.\r |
d1102dba | 872 | \r |
3dc8585e JY |
873 | @return Duplicated AML handle.\r |
874 | **/\r | |
875 | EFI_AML_HANDLE *\r | |
876 | SdtDuplicateHandle (\r | |
877 | IN EFI_AML_HANDLE *AmlHandle\r | |
878 | )\r | |
879 | {\r | |
880 | EFI_AML_HANDLE *DstAmlHandle;\r | |
881 | \r | |
882 | DstAmlHandle = AllocatePool (sizeof(*DstAmlHandle));\r | |
883 | ASSERT (DstAmlHandle != NULL);\r | |
884 | CopyMem (DstAmlHandle, (VOID *)AmlHandle, sizeof(*DstAmlHandle));\r | |
885 | \r | |
886 | return DstAmlHandle;\r | |
887 | }\r | |
888 | \r | |
889 | /**\r | |
890 | Returns the handle of the ACPI object representing the specified ACPI path\r | |
d1102dba | 891 | \r |
3dc8585e JY |
892 | @param[in] HandleIn Points to the handle of the object representing the starting point for the path search.\r |
893 | @param[in] AmlPath Points to the AML path.\r | |
894 | @param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to\r | |
895 | HandleIn.\r | |
d1102dba | 896 | \r |
3dc8585e | 897 | @retval EFI_SUCCESS Success\r |
d1102dba | 898 | @retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object.\r |
3dc8585e JY |
899 | **/\r |
900 | EFI_STATUS\r | |
901 | SdtFindPathFromRoot (\r | |
902 | IN EFI_ACPI_HANDLE HandleIn,\r | |
903 | IN UINT8 *AmlPath,\r | |
904 | OUT EFI_ACPI_HANDLE *HandleOut\r | |
905 | )\r | |
906 | {\r | |
907 | EFI_ACPI_HANDLE ChildHandle;\r | |
908 | EFI_AML_HANDLE *AmlHandle;\r | |
909 | EFI_STATUS Status;\r | |
910 | VOID *Buffer;\r | |
911 | \r | |
4e1005ec | 912 | Buffer = NULL;\r |
3dc8585e JY |
913 | AmlHandle = (EFI_AML_HANDLE *)HandleIn;\r |
914 | \r | |
915 | //\r | |
916 | // Handle case that AcpiPath is Root\r | |
917 | //\r | |
918 | if (AmlIsRootPath (AmlPath)) {\r | |
919 | //\r | |
920 | // Duplicate RootHandle\r | |
921 | //\r | |
922 | *HandleOut = (EFI_ACPI_HANDLE)SdtDuplicateHandle (AmlHandle);\r | |
923 | return EFI_SUCCESS;\r | |
924 | }\r | |
925 | \r | |
926 | //\r | |
927 | // Let children find it.\r | |
928 | //\r | |
929 | ChildHandle = NULL;\r | |
930 | while (TRUE) {\r | |
931 | Status = GetChild (HandleIn, &ChildHandle);\r | |
932 | if (EFI_ERROR (Status)) {\r | |
933 | return EFI_INVALID_PARAMETER;\r | |
934 | }\r | |
935 | \r | |
936 | if (ChildHandle == NULL) {\r | |
937 | //\r | |
938 | // Not found\r | |
939 | //\r | |
940 | *HandleOut = NULL;\r | |
941 | return EFI_SUCCESS;\r | |
942 | }\r | |
943 | \r | |
944 | //\r | |
945 | // More child\r | |
946 | //\r | |
947 | AmlHandle = (EFI_AML_HANDLE *)ChildHandle;\r | |
948 | Status = AmlFindPath (AmlHandle, AmlPath, &Buffer, TRUE);\r | |
949 | if (EFI_ERROR (Status)) {\r | |
950 | return EFI_INVALID_PARAMETER;\r | |
951 | }\r | |
952 | \r | |
953 | if (Buffer != NULL) {\r | |
954 | //\r | |
955 | // Great! Find it, open\r | |
956 | //\r | |
957 | Status = SdtOpenEx (Buffer, (UINTN)AmlHandle->Buffer + AmlHandle->Size - (UINTN)Buffer, HandleOut);\r | |
958 | if (!EFI_ERROR (Status)) {\r | |
959 | return EFI_SUCCESS;\r | |
960 | }\r | |
961 | //\r | |
962 | // Not success, try next one\r | |
963 | //\r | |
964 | }\r | |
965 | }\r | |
966 | \r | |
967 | //\r | |
968 | // Should not run here\r | |
969 | //\r | |
970 | }\r | |
971 | \r | |
972 | /**\r | |
973 | Returns the handle of the ACPI object representing the specified ACPI path\r | |
d1102dba | 974 | \r |
3dc8585e JY |
975 | @param[in] HandleIn Points to the handle of the object representing the starting point for the path search.\r |
976 | @param[in] AcpiPath Points to the ACPI path, which conforms to the ACPI encoded path format.\r | |
977 | @param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to\r | |
978 | HandleIn.\r | |
d1102dba | 979 | \r |
3dc8585e | 980 | @retval EFI_SUCCESS Success\r |
d1102dba | 981 | @retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object.\r |
3dc8585e JY |
982 | **/\r |
983 | EFI_STATUS\r | |
984 | EFIAPI\r | |
985 | FindPath (\r | |
986 | IN EFI_ACPI_HANDLE HandleIn,\r | |
987 | IN VOID *AcpiPath,\r | |
988 | OUT EFI_ACPI_HANDLE *HandleOut\r | |
989 | )\r | |
990 | {\r | |
991 | EFI_AML_HANDLE *AmlHandle;\r | |
992 | EFI_STATUS Status;\r | |
993 | UINT8 *AmlPath;\r | |
994 | \r | |
995 | //\r | |
996 | // Check for invalid input parameters\r | |
997 | //\r | |
998 | if (HandleIn == NULL) {\r | |
999 | return EFI_INVALID_PARAMETER;\r | |
1000 | }\r | |
1001 | \r | |
1002 | AmlHandle = (EFI_AML_HANDLE *)HandleIn;\r | |
d1102dba | 1003 | \r |
3dc8585e JY |
1004 | //\r |
1005 | // Convert ASL path to AML path\r | |
1006 | //\r | |
1007 | AmlPath = AmlNameFromAslName (AcpiPath);\r | |
1008 | if (AmlPath == NULL) {\r | |
1009 | return EFI_INVALID_PARAMETER;\r | |
1010 | }\r | |
1011 | \r | |
1012 | DEBUG_CODE_BEGIN ();\r | |
1013 | DEBUG ((EFI_D_ERROR, "AcpiSdt: FindPath - "));\r | |
1014 | AmlPrintNameString (AmlPath);\r | |
1015 | DEBUG ((EFI_D_ERROR, "\n"));\r | |
1016 | DEBUG_CODE_END ();\r | |
1017 | \r | |
1018 | if (AmlHandle->Signature == EFI_AML_ROOT_HANDLE_SIGNATURE) {\r | |
1019 | //\r | |
1020 | // Root Handle\r | |
1021 | //\r | |
1022 | Status = SdtFindPathFromRoot (HandleIn, AmlPath, HandleOut);\r | |
1023 | } else if (AmlHandle->Signature == EFI_AML_HANDLE_SIGNATURE) {\r | |
1024 | //\r | |
1025 | // Non-Root handle\r | |
1026 | //\r | |
1027 | Status = SdtFindPathFromNonRoot (HandleIn, AmlPath, HandleOut);\r | |
1028 | } else {\r | |
1029 | Status = EFI_INVALID_PARAMETER;\r | |
1030 | }\r | |
1031 | \r | |
1032 | FreePool (AmlPath);\r | |
1033 | \r | |
1034 | return Status;\r | |
1035 | }\r | |
1036 | \r | |
3dc8585e JY |
1037 | /**\r |
1038 | This function initializes AcpiSdt protocol in ACPI table instance.\r | |
1039 | \r | |
1040 | @param[in] AcpiTableInstance Instance to construct\r | |
1041 | **/\r | |
1042 | VOID\r | |
1043 | SdtAcpiTableAcpiSdtConstructor (\r | |
1044 | IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance\r | |
1045 | )\r | |
1046 | {\r | |
3dc8585e JY |
1047 | \r |
1048 | InitializeListHead (&AcpiTableInstance->NotifyList);\r | |
1049 | CopyMem (&AcpiTableInstance->AcpiSdtProtocol, &mAcpiSdtProtocolTemplate, sizeof(mAcpiSdtProtocolTemplate));\r | |
f9bbb8d9 | 1050 | AcpiTableInstance->AcpiSdtProtocol.AcpiVersion = (EFI_ACPI_TABLE_VERSION)PcdGet32 (PcdAcpiExposedTableVersions);\r |
3dc8585e | 1051 | \r |
3dc8585e JY |
1052 | return ;\r |
1053 | }\r |