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1 | /** @file\r | |
2 | ACPI Sdt Protocol Driver\r | |
3 | \r | |
4 | Copyright (c) 2010, Intel Corporation. All rights reserved. <BR>\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 "AcpiTable.h"\r | |
16 | \r | |
17 | /**\r | |
18 | Check if it is AML Root name\r | |
19 | \r | |
20 | @param[in] Buffer AML path.\r | |
21 | \r | |
22 | @retval TRUE AML path is root.\r | |
23 | @retval FALSE AML path is not root.\r | |
24 | **/\r | |
25 | BOOLEAN\r | |
26 | AmlIsRootPath (\r | |
27 | IN UINT8 *Buffer\r | |
28 | )\r | |
29 | {\r | |
30 | if ((Buffer[0] == AML_ROOT_CHAR) && (Buffer[1] == 0)) {\r | |
31 | return TRUE;\r | |
32 | } else {\r | |
33 | return FALSE;\r | |
34 | }\r | |
35 | }\r | |
36 | \r | |
37 | /**\r | |
38 | Check if it is AML LeadName.\r | |
39 | \r | |
40 | @param[in] Ch Char.\r | |
41 | \r | |
42 | @retval TRUE Char is AML LeadName.\r | |
43 | @retval FALSE Char is not AML LeadName.\r | |
44 | **/\r | |
45 | BOOLEAN\r | |
46 | AmlIsLeadName (\r | |
47 | IN CHAR8 Ch\r | |
48 | )\r | |
49 | {\r | |
50 | if ((Ch == '_') || (Ch >= 'A' && Ch <= 'Z')) {\r | |
51 | return TRUE;\r | |
52 | } else {\r | |
53 | return FALSE;\r | |
54 | }\r | |
55 | }\r | |
56 | \r | |
57 | /**\r | |
58 | Check if it is AML Name.\r | |
59 | \r | |
60 | @param[in] Ch Char.\r | |
61 | \r | |
62 | @retval TRUE Char is AML Name.\r | |
63 | @retval FALSE Char is not AML Name.\r | |
64 | **/\r | |
65 | BOOLEAN\r | |
66 | AmlIsName (\r | |
67 | IN CHAR8 Ch\r | |
68 | )\r | |
69 | {\r | |
70 | if (AmlIsLeadName (Ch) || (Ch >= '0' && Ch <= '9')) {\r | |
71 | return TRUE;\r | |
72 | } else {\r | |
73 | return FALSE;\r | |
74 | }\r | |
75 | }\r | |
76 | \r | |
77 | /**\r | |
78 | Return is buffer is AML NameSeg.\r | |
79 | \r | |
80 | @param[in] Buffer AML NameSement.\r | |
81 | \r | |
82 | @retval TRUE It is AML NameSegment.\r | |
83 | @retval FALSE It is not AML NameSegment.\r | |
84 | **/\r | |
85 | BOOLEAN\r | |
86 | AmlIsNameSeg (\r | |
87 | IN UINT8 *Buffer\r | |
88 | )\r | |
89 | {\r | |
90 | UINTN Index;\r | |
91 | if (!AmlIsLeadName (Buffer[0])) {\r | |
92 | return FALSE;\r | |
93 | }\r | |
94 | for (Index = 1; Index < AML_NAME_SEG_SIZE; Index++) {\r | |
95 | if (!AmlIsName (Buffer[Index])) {\r | |
96 | return FALSE;\r | |
97 | }\r | |
98 | }\r | |
99 | return TRUE;\r | |
100 | }\r | |
101 | \r | |
102 | /**\r | |
103 | Get AML NameString size.\r | |
104 | \r | |
105 | @param[in] Buffer AML NameString.\r | |
106 | @param[out] BufferSize AML NameString size \r | |
107 | \r | |
108 | @retval EFI_SUCCESS Success.\r | |
109 | @retval EFI_INVALID_PARAMETER Buffer does not refer to a valid AML NameString.\r | |
110 | **/\r | |
111 | EFI_STATUS\r | |
112 | AmlGetNameStringSize (\r | |
113 | IN UINT8 *Buffer,\r | |
114 | OUT UINTN *BufferSize\r | |
115 | )\r | |
116 | {\r | |
117 | UINTN SegCount;\r | |
118 | UINTN Length;\r | |
119 | UINTN Index;\r | |
120 | UINT8 *Name;\r | |
121 | \r | |
122 | Name = Buffer;\r | |
123 | Length = 0;\r | |
124 | \r | |
125 | //\r | |
126 | // Parse root or parent prefix\r | |
127 | //\r | |
128 | if (*Buffer == AML_ROOT_CHAR) {\r | |
129 | Buffer ++;\r | |
130 | Length ++;\r | |
131 | } else if (*Buffer == AML_PARENT_PREFIX_CHAR) {\r | |
132 | do {\r | |
133 | Buffer ++;\r | |
134 | Length ++;\r | |
135 | } while (*Buffer == AML_PARENT_PREFIX_CHAR);\r | |
136 | }\r | |
137 | \r | |
138 | //\r | |
139 | // Parse name segment\r | |
140 | //\r | |
141 | if (*Buffer == AML_DUAL_NAME_PREFIX) {\r | |
142 | Buffer ++;\r | |
143 | Length ++;\r | |
144 | SegCount = 2;\r | |
145 | } else if (*Buffer == AML_MULTI_NAME_PREFIX) {\r | |
146 | Buffer ++;\r | |
147 | Length ++;\r | |
148 | SegCount = *Buffer;\r | |
149 | Buffer ++;\r | |
150 | Length ++;\r | |
151 | } else if (*Buffer == 0) {\r | |
152 | //\r | |
153 | // NULL Name, only for Root\r | |
154 | //\r | |
155 | SegCount = 0;\r | |
156 | Buffer --;\r | |
157 | if ((Length == 1) && (*Buffer == AML_ROOT_CHAR)) {\r | |
158 | *BufferSize = 2;\r | |
159 | return EFI_SUCCESS;\r | |
160 | } else {\r | |
161 | return EFI_INVALID_PARAMETER;\r | |
162 | }\r | |
163 | } else {\r | |
164 | //\r | |
165 | // NameSeg\r | |
166 | //\r | |
167 | SegCount = 1;\r | |
168 | }\r | |
169 | \r | |
170 | Index = 0;\r | |
171 | do {\r | |
172 | if (!AmlIsNameSeg (Buffer)) {\r | |
173 | return EFI_INVALID_PARAMETER;\r | |
174 | }\r | |
175 | Buffer += AML_NAME_SEG_SIZE;\r | |
176 | Length += AML_NAME_SEG_SIZE;\r | |
177 | Index ++;\r | |
178 | } while (Index < SegCount);\r | |
179 | \r | |
180 | *BufferSize = Length;\r | |
181 | return EFI_SUCCESS;\r | |
182 | }\r | |
183 | \r | |
184 | /**\r | |
185 | Check if it is ASL LeadName.\r | |
186 | \r | |
187 | @param[in] Ch Char.\r | |
188 | \r | |
189 | @retval TRUE Char is ASL LeadName.\r | |
190 | @retval FALSE Char is not ASL LeadName.\r | |
191 | **/\r | |
192 | BOOLEAN\r | |
193 | AmlIsAslLeadName (\r | |
194 | IN CHAR8 Ch\r | |
195 | )\r | |
196 | {\r | |
197 | if (AmlIsLeadName (Ch) || (Ch >= 'a' && Ch <= 'z')) {\r | |
198 | return TRUE;\r | |
199 | } else {\r | |
200 | return FALSE;\r | |
201 | }\r | |
202 | }\r | |
203 | \r | |
204 | /**\r | |
205 | Check if it is ASL Name.\r | |
206 | \r | |
207 | @param[in] Ch Char.\r | |
208 | \r | |
209 | @retval TRUE Char is ASL Name.\r | |
210 | @retval FALSE Char is not ASL Name.\r | |
211 | **/\r | |
212 | BOOLEAN\r | |
213 | AmlIsAslName (\r | |
214 | IN CHAR8 Ch\r | |
215 | )\r | |
216 | {\r | |
217 | if (AmlIsAslLeadName (Ch) || (Ch >= '0' && Ch <= '9')) {\r | |
218 | return TRUE;\r | |
219 | } else {\r | |
220 | return FALSE;\r | |
221 | }\r | |
222 | }\r | |
223 | \r | |
224 | /**\r | |
225 | Get ASL NameString size.\r | |
226 | \r | |
227 | @param[in] Buffer ASL NameString.\r | |
228 | \r | |
229 | @return ASL NameString size.\r | |
230 | **/\r | |
231 | UINTN\r | |
232 | AmlGetAslNameSegLength (\r | |
233 | IN UINT8 *Buffer\r | |
234 | )\r | |
235 | {\r | |
236 | UINTN Length;\r | |
237 | UINTN Index;\r | |
238 | \r | |
239 | if (*Buffer == 0) {\r | |
240 | return 0;\r | |
241 | }\r | |
242 | \r | |
243 | Length = 0;\r | |
244 | //\r | |
245 | // 1st\r | |
246 | //\r | |
247 | if (AmlIsAslLeadName (*Buffer)) {\r | |
248 | Length ++;\r | |
249 | Buffer ++;\r | |
250 | }\r | |
251 | if ((*Buffer == 0) || (*Buffer == '.')) {\r | |
252 | return Length;\r | |
253 | }\r | |
254 | //\r | |
255 | // 2, 3, 4 name char\r | |
256 | //\r | |
257 | for (Index = 0; Index < 3; Index++) {\r | |
258 | if (AmlIsAslName (*Buffer)) {\r | |
259 | Length ++;\r | |
260 | Buffer ++;\r | |
261 | }\r | |
262 | if ((*Buffer == 0) || (*Buffer == '.')) {\r | |
263 | return Length;\r | |
264 | }\r | |
265 | }\r | |
266 | \r | |
267 | //\r | |
268 | // Invalid ASL name\r | |
269 | //\r | |
270 | return 0;\r | |
271 | }\r | |
272 | \r | |
273 | /**\r | |
274 | Get ASL NameString size.\r | |
275 | \r | |
276 | @param[in] Buffer ASL NameString.\r | |
277 | @param[out] Root On return, points to Root char number.\r | |
278 | @param[out] Parent On return, points to Parent char number.\r | |
279 | @param[out] SegCount On return, points to Segment count.\r | |
280 | \r | |
281 | @return ASL NameString size.\r | |
282 | **/\r | |
283 | UINTN\r | |
284 | AmlGetAslNameStringSize (\r | |
285 | IN UINT8 *Buffer,\r | |
286 | OUT UINTN *Root,\r | |
287 | OUT UINTN *Parent,\r | |
288 | OUT UINTN *SegCount\r | |
289 | )\r | |
290 | {\r | |
291 | UINTN NameLength;\r | |
292 | UINTN TotalLength;\r | |
293 | \r | |
294 | *Root = 0;\r | |
295 | *Parent = 0;\r | |
296 | *SegCount = 0;\r | |
297 | TotalLength = 0;\r | |
298 | NameLength = 0;\r | |
299 | if (*Buffer == AML_ROOT_CHAR) {\r | |
300 | *Root = 1;\r | |
301 | Buffer ++;\r | |
302 | } else if (*Buffer == AML_PARENT_PREFIX_CHAR) {\r | |
303 | do {\r | |
304 | Buffer ++;\r | |
305 | (*Parent) ++;\r | |
306 | } while (*Buffer == AML_PARENT_PREFIX_CHAR);\r | |
307 | }\r | |
308 | \r | |
309 | //\r | |
310 | // Now parse name\r | |
311 | //\r | |
312 | while (*Buffer != 0) {\r | |
313 | NameLength = AmlGetAslNameSegLength (Buffer);\r | |
314 | if ((NameLength == 0) || (NameLength > AML_NAME_SEG_SIZE)) {\r | |
315 | return 0;\r | |
316 | }\r | |
317 | (*SegCount) ++;\r | |
318 | Buffer += NameLength;\r | |
319 | if (*Buffer == 0) {\r | |
320 | break;\r | |
321 | }\r | |
322 | Buffer ++;\r | |
323 | }\r | |
324 | \r | |
325 | //\r | |
326 | // Check SegCoount\r | |
327 | //\r | |
328 | if (*SegCount > 0xFF) {\r | |
329 | return 0;\r | |
330 | }\r | |
331 | \r | |
332 | //\r | |
333 | // Calculate total length\r | |
334 | //\r | |
335 | TotalLength = *Root + *Parent + (*SegCount) * AML_NAME_SEG_SIZE;\r | |
336 | if (*SegCount > 2) {\r | |
337 | TotalLength += 2;\r | |
338 | } else if (*SegCount == 2) {\r | |
339 | TotalLength += 1;\r | |
340 | }\r | |
341 | \r | |
342 | //\r | |
343 | // Add NULL char\r | |
344 | //\r | |
345 | TotalLength ++;\r | |
346 | \r | |
347 | return TotalLength;\r | |
348 | }\r | |
349 | \r | |
350 | /**\r | |
351 | Copy mem, and cast all the char in dest to be upper case.\r | |
352 | \r | |
353 | @param[in] DstBuffer Destination buffer.\r | |
354 | @param[in] SrcBuffer Source buffer.\r | |
355 | @param[in] Length Buffer length.\r | |
356 | **/\r | |
357 | VOID\r | |
358 | AmlUpperCaseCopyMem (\r | |
359 | IN UINT8 *DstBuffer,\r | |
360 | IN UINT8 *SrcBuffer,\r | |
361 | IN UINTN Length\r | |
362 | )\r | |
363 | {\r | |
364 | UINTN Index;\r | |
365 | \r | |
366 | for (Index = 0; Index < Length; Index++) {\r | |
367 | if (SrcBuffer[Index] >= 'a' && SrcBuffer[Index] <= 'z') {\r | |
368 | DstBuffer[Index] = (UINT8)(SrcBuffer[Index] - 'a' + 'A');\r | |
369 | } else {\r | |
370 | DstBuffer[Index] = SrcBuffer[Index];\r | |
371 | }\r | |
372 | }\r | |
373 | }\r | |
374 | \r | |
375 | /**\r | |
376 | Return AML name according to ASL name.\r | |
377 | The caller need free the AmlName returned.\r | |
378 | \r | |
379 | @param[in] AslPath ASL name.\r | |
380 | \r | |
381 | @return AmlName\r | |
382 | **/\r | |
383 | UINT8 *\r | |
384 | AmlNameFromAslName (\r | |
385 | IN UINT8 *AslPath\r | |
386 | )\r | |
387 | {\r | |
388 | UINTN Root;\r | |
389 | UINTN Parent;\r | |
390 | UINTN SegCount;\r | |
391 | UINTN TotalLength;\r | |
392 | UINTN NameLength;\r | |
393 | UINT8 *Buffer;\r | |
394 | UINT8 *AmlPath;\r | |
395 | UINT8 *AmlBuffer;\r | |
396 | \r | |
397 | TotalLength = AmlGetAslNameStringSize (AslPath, &Root, &Parent, &SegCount);\r | |
398 | if (TotalLength == 0) {\r | |
399 | return NULL;\r | |
400 | }\r | |
401 | \r | |
402 | AmlPath = AllocatePool (TotalLength);\r | |
403 | ASSERT (AmlPath != NULL);\r | |
404 | \r | |
405 | AmlBuffer = AmlPath;\r | |
406 | Buffer = AslPath;\r | |
407 | \r | |
408 | //\r | |
409 | // Handle Root and Parent\r | |
410 | //\r | |
411 | if (Root == 1) {\r | |
412 | *AmlBuffer = AML_ROOT_CHAR;\r | |
413 | AmlBuffer ++;\r | |
414 | Buffer ++;\r | |
415 | } else if (Parent > 0) {\r | |
416 | SetMem (AmlBuffer, Parent, AML_PARENT_PREFIX_CHAR);\r | |
417 | AmlBuffer += Parent;\r | |
418 | Buffer += Parent;\r | |
419 | }\r | |
420 | \r | |
421 | //\r | |
422 | // Handle SegCount\r | |
423 | //\r | |
424 | if (SegCount > 2) {\r | |
425 | *AmlBuffer = AML_MULTI_NAME_PREFIX;\r | |
426 | AmlBuffer ++;\r | |
427 | *AmlBuffer = (UINT8)SegCount;\r | |
428 | AmlBuffer ++;\r | |
429 | } else if (SegCount == 2) {\r | |
430 | *AmlBuffer = AML_DUAL_NAME_PREFIX;\r | |
431 | AmlBuffer ++;\r | |
432 | }\r | |
433 | \r | |
434 | //\r | |
435 | // Now to name\r | |
436 | //\r | |
437 | while (*Buffer != 0) {\r | |
438 | NameLength = AmlGetAslNameSegLength (Buffer);\r | |
439 | ASSERT ((NameLength != 0) && (NameLength <= AML_NAME_SEG_SIZE));\r | |
440 | AmlUpperCaseCopyMem (AmlBuffer, Buffer, NameLength);\r | |
441 | SetMem (AmlBuffer + NameLength, AML_NAME_SEG_SIZE - NameLength, AML_NAME_CHAR__);\r | |
442 | Buffer += NameLength;\r | |
443 | AmlBuffer += AML_NAME_SEG_SIZE;\r | |
444 | if (*Buffer == 0) {\r | |
445 | break;\r | |
446 | }\r | |
447 | Buffer ++;\r | |
448 | }\r | |
449 | \r | |
450 | //\r | |
451 | // Add NULL\r | |
452 | //\r | |
453 | AmlPath[TotalLength - 1] = 0;\r | |
454 | \r | |
455 | return AmlPath;\r | |
456 | }\r | |
457 | \r | |
458 | /**\r | |
459 | Print AML NameSeg.\r | |
460 | \r | |
461 | @param[in] Buffer AML NameSeg.\r | |
462 | **/\r | |
463 | VOID\r | |
464 | AmlPrintNameSeg (\r | |
465 | IN UINT8 *Buffer\r | |
466 | )\r | |
467 | {\r | |
468 | DEBUG ((EFI_D_ERROR, "%c", Buffer[0]));\r | |
469 | if ((Buffer[1] == '_') && (Buffer[2] == '_') && (Buffer[3] == '_')) {\r | |
470 | return ;\r | |
471 | }\r | |
472 | DEBUG ((EFI_D_ERROR, "%c", Buffer[1]));\r | |
473 | if ((Buffer[2] == '_') && (Buffer[3] == '_')) {\r | |
474 | return ;\r | |
475 | }\r | |
476 | DEBUG ((EFI_D_ERROR, "%c", Buffer[2]));\r | |
477 | if (Buffer[3] == '_') {\r | |
478 | return ;\r | |
479 | }\r | |
480 | DEBUG ((EFI_D_ERROR, "%c", Buffer[3]));\r | |
481 | return ;\r | |
482 | }\r | |
483 | \r | |
484 | /**\r | |
485 | Print AML NameString.\r | |
486 | \r | |
487 | @param[in] Buffer AML NameString.\r | |
488 | **/\r | |
489 | VOID\r | |
490 | AmlPrintNameString (\r | |
491 | IN UINT8 *Buffer\r | |
492 | )\r | |
493 | {\r | |
494 | UINT8 SegCount;\r | |
495 | UINT8 Index;\r | |
496 | UINT8 *Name;\r | |
497 | \r | |
498 | Name = Buffer;\r | |
499 | if (*Buffer == AML_ROOT_CHAR) {\r | |
500 | //\r | |
501 | // RootChar\r | |
502 | //\r | |
503 | Buffer ++;\r | |
504 | DEBUG ((EFI_D_ERROR, "\\"));\r | |
505 | } else if (*Buffer == AML_PARENT_PREFIX_CHAR) {\r | |
506 | //\r | |
507 | // ParentPrefixChar\r | |
508 | //\r | |
509 | do {\r | |
510 | Buffer ++;\r | |
511 | DEBUG ((EFI_D_ERROR, "^"));\r | |
512 | } while (*Buffer == AML_PARENT_PREFIX_CHAR);\r | |
513 | }\r | |
514 | \r | |
515 | if (*Buffer == AML_DUAL_NAME_PREFIX) {\r | |
516 | //\r | |
517 | // DualName\r | |
518 | //\r | |
519 | Buffer ++;\r | |
520 | SegCount = 2;\r | |
521 | } else if (*Buffer == AML_MULTI_NAME_PREFIX) {\r | |
522 | //\r | |
523 | // MultiName\r | |
524 | //\r | |
525 | Buffer ++;\r | |
526 | SegCount = *Buffer;\r | |
527 | Buffer ++;\r | |
528 | } else if (*Buffer == 0) {\r | |
529 | //\r | |
530 | // NULL Name\r | |
531 | //\r | |
532 | return ;\r | |
533 | } else {\r | |
534 | //\r | |
535 | // NameSeg\r | |
536 | //\r | |
537 | SegCount = 1;\r | |
538 | }\r | |
539 | \r | |
540 | AmlPrintNameSeg (Buffer);\r | |
541 | Buffer += AML_NAME_SEG_SIZE;\r | |
542 | for (Index = 0; Index < SegCount - 1; Index++) {\r | |
543 | DEBUG ((EFI_D_ERROR, "."));\r | |
544 | AmlPrintNameSeg (Buffer);\r | |
545 | Buffer += AML_NAME_SEG_SIZE;\r | |
546 | }\r | |
547 | \r | |
548 | return ;\r | |
549 | }\r |