1 /******************************************************************************
2 *
3 * Module Name: oslinuxtbl - Linux OSL for obtaining ACPI tables
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpidump.h"
153
154
155 #define _COMPONENT ACPI_OS_SERVICES
156 ACPI_MODULE_NAME ("oslinuxtbl")
157
158
159 #ifndef PATH_MAX
160 #define PATH_MAX 256
161 #endif
162
163
164 /* List of information about obtained ACPI tables */
165
166 typedef struct osl_table_info
167 {
168 struct osl_table_info *Next;
169 UINT32 Instance;
170 char Signature[ACPI_NAMESEG_SIZE];
171
172 } OSL_TABLE_INFO;
173
174 /* Local prototypes */
175
176 static ACPI_STATUS
177 OslTableInitialize (
178 void);
179
180 static ACPI_STATUS
181 OslTableNameFromFile (
182 char *Filename,
183 char *Signature,
184 UINT32 *Instance);
185
186 static ACPI_STATUS
187 OslAddTableToList (
188 char *Signature,
189 UINT32 Instance);
190
191 static ACPI_STATUS
192 OslReadTableFromFile (
193 char *Filename,
194 ACPI_SIZE FileOffset,
195 ACPI_TABLE_HEADER **Table);
196
197 static ACPI_STATUS
198 OslMapTable (
199 ACPI_SIZE Address,
200 char *Signature,
201 ACPI_TABLE_HEADER **Table);
202
203 static void
204 OslUnmapTable (
205 ACPI_TABLE_HEADER *Table);
206
207 static ACPI_PHYSICAL_ADDRESS
208 OslFindRsdpViaEfiByKeyword (
209 FILE *File,
210 const char *Keyword);
211
212 static ACPI_PHYSICAL_ADDRESS
213 OslFindRsdpViaEfi (
214 void);
215
216 static ACPI_STATUS
217 OslLoadRsdp (
218 void);
219
220 static ACPI_STATUS
221 OslListCustomizedTables (
222 char *Directory);
223
224 static ACPI_STATUS
225 OslGetCustomizedTable (
226 char *Pathname,
227 char *Signature,
228 UINT32 Instance,
229 ACPI_TABLE_HEADER **Table,
230 ACPI_PHYSICAL_ADDRESS *Address);
231
232 static ACPI_STATUS
233 OslListBiosTables (
234 void);
235
236 static ACPI_STATUS
237 OslGetBiosTable (
238 char *Signature,
239 UINT32 Instance,
240 ACPI_TABLE_HEADER **Table,
241 ACPI_PHYSICAL_ADDRESS *Address);
242
243 static ACPI_STATUS
244 OslGetLastStatus (
245 ACPI_STATUS DefaultStatus);
246
247
248 /* File locations */
249
250 #define DYNAMIC_TABLE_DIR "/sys/firmware/acpi/tables/dynamic"
251 #define STATIC_TABLE_DIR "/sys/firmware/acpi/tables"
252 #define EFI_SYSTAB "/sys/firmware/efi/systab"
253
254 /* Should we get dynamically loaded SSDTs from DYNAMIC_TABLE_DIR? */
255
256 UINT8 Gbl_DumpDynamicTables = TRUE;
257
258 /* Initialization flags */
259
260 UINT8 Gbl_TableListInitialized = FALSE;
261
262 /* Local copies of main ACPI tables */
263
264 ACPI_TABLE_RSDP Gbl_Rsdp;
265 ACPI_TABLE_FADT *Gbl_Fadt = NULL;
266 ACPI_TABLE_RSDT *Gbl_Rsdt = NULL;
267 ACPI_TABLE_XSDT *Gbl_Xsdt = NULL;
268
269 /* Table addresses */
270
271 ACPI_PHYSICAL_ADDRESS Gbl_FadtAddress = 0;
272 ACPI_PHYSICAL_ADDRESS Gbl_RsdpAddress = 0;
273
274 /* Revision of RSD PTR */
275
276 UINT8 Gbl_Revision = 0;
277
278 OSL_TABLE_INFO *Gbl_TableListHead = NULL;
279 UINT32 Gbl_TableCount = 0;
280
281
282 /******************************************************************************
283 *
284 * FUNCTION: OslGetLastStatus
285 *
286 * PARAMETERS: DefaultStatus - Default error status to return
287 *
288 * RETURN: Status; Converted from errno.
289 *
290 * DESCRIPTION: Get last errno and convert it to ACPI_STATUS.
291 *
292 *****************************************************************************/
293
294 static ACPI_STATUS
OslGetLastStatus(ACPI_STATUS DefaultStatus)295 OslGetLastStatus (
296 ACPI_STATUS DefaultStatus)
297 {
298
299 switch (errno)
300 {
301 case EACCES:
302 case EPERM:
303
304 return (AE_ACCESS);
305
306 case ENOENT:
307
308 return (AE_NOT_FOUND);
309
310 case ENOMEM:
311
312 return (AE_NO_MEMORY);
313
314 default:
315
316 return (DefaultStatus);
317 }
318 }
319
320
321 /******************************************************************************
322 *
323 * FUNCTION: AcpiOsGetTableByAddress
324 *
325 * PARAMETERS: Address - Physical address of the ACPI table
326 * Table - Where a pointer to the table is returned
327 *
328 * RETURN: Status; Table buffer is returned if AE_OK.
329 * AE_NOT_FOUND: A valid table was not found at the address
330 *
331 * DESCRIPTION: Get an ACPI table via a physical memory address.
332 *
333 *****************************************************************************/
334
335 ACPI_STATUS
AcpiOsGetTableByAddress(ACPI_PHYSICAL_ADDRESS Address,ACPI_TABLE_HEADER ** Table)336 AcpiOsGetTableByAddress (
337 ACPI_PHYSICAL_ADDRESS Address,
338 ACPI_TABLE_HEADER **Table)
339 {
340 UINT32 TableLength;
341 ACPI_TABLE_HEADER *MappedTable;
342 ACPI_TABLE_HEADER *LocalTable = NULL;
343 ACPI_STATUS Status = AE_OK;
344
345
346 /* Get main ACPI tables from memory on first invocation of this function */
347
348 Status = OslTableInitialize ();
349 if (ACPI_FAILURE (Status))
350 {
351 return (Status);
352 }
353
354 /* Map the table and validate it */
355
356 Status = OslMapTable (Address, NULL, &MappedTable);
357 if (ACPI_FAILURE (Status))
358 {
359 return (Status);
360 }
361
362 /* Copy table to local buffer and return it */
363
364 TableLength = ApGetTableLength (MappedTable);
365 if (TableLength == 0)
366 {
367 Status = AE_BAD_HEADER;
368 goto Exit;
369 }
370
371 LocalTable = calloc (1, TableLength);
372 if (!LocalTable)
373 {
374 Status = AE_NO_MEMORY;
375 goto Exit;
376 }
377
378 memcpy (LocalTable, MappedTable, TableLength);
379
380 Exit:
381 OslUnmapTable (MappedTable);
382 *Table = LocalTable;
383 return (Status);
384 }
385
386
387 /******************************************************************************
388 *
389 * FUNCTION: AcpiOsGetTableByName
390 *
391 * PARAMETERS: Signature - ACPI Signature for desired table. Must be
392 * a null terminated 4-character string.
393 * Instance - Multiple table support for SSDT/UEFI (0...n)
394 * Must be 0 for other tables.
395 * Table - Where a pointer to the table is returned
396 * Address - Where the table physical address is returned
397 *
398 * RETURN: Status; Table buffer and physical address returned if AE_OK.
399 * AE_LIMIT: Instance is beyond valid limit
400 * AE_NOT_FOUND: A table with the signature was not found
401 *
402 * NOTE: Assumes the input signature is uppercase.
403 *
404 *****************************************************************************/
405
406 ACPI_STATUS
AcpiOsGetTableByName(char * Signature,UINT32 Instance,ACPI_TABLE_HEADER ** Table,ACPI_PHYSICAL_ADDRESS * Address)407 AcpiOsGetTableByName (
408 char *Signature,
409 UINT32 Instance,
410 ACPI_TABLE_HEADER **Table,
411 ACPI_PHYSICAL_ADDRESS *Address)
412 {
413 ACPI_STATUS Status;
414
415
416 /* Get main ACPI tables from memory on first invocation of this function */
417
418 Status = OslTableInitialize ();
419 if (ACPI_FAILURE (Status))
420 {
421 return (Status);
422 }
423
424 /* Not a main ACPI table, attempt to extract it from the RSDT/XSDT */
425
426 if (!Gbl_DumpCustomizedTables)
427 {
428 /* Attempt to get the table from the memory */
429
430 Status = OslGetBiosTable (Signature, Instance, Table, Address);
431 }
432 else
433 {
434 /* Attempt to get the table from the static directory */
435
436 Status = OslGetCustomizedTable (STATIC_TABLE_DIR, Signature,
437 Instance, Table, Address);
438 }
439
440 if (ACPI_FAILURE (Status) && Status == AE_LIMIT)
441 {
442 if (Gbl_DumpDynamicTables)
443 {
444 /* Attempt to get a dynamic table */
445
446 Status = OslGetCustomizedTable (DYNAMIC_TABLE_DIR, Signature,
447 Instance, Table, Address);
448 }
449 }
450
451 return (Status);
452 }
453
454
455 /******************************************************************************
456 *
457 * FUNCTION: OslAddTableToList
458 *
459 * PARAMETERS: Signature - Table signature
460 * Instance - Table instance
461 *
462 * RETURN: Status; Successfully added if AE_OK.
463 * AE_NO_MEMORY: Memory allocation error
464 *
465 * DESCRIPTION: Insert a table structure into OSL table list.
466 *
467 *****************************************************************************/
468
469 static ACPI_STATUS
OslAddTableToList(char * Signature,UINT32 Instance)470 OslAddTableToList (
471 char *Signature,
472 UINT32 Instance)
473 {
474 OSL_TABLE_INFO *NewInfo;
475 OSL_TABLE_INFO *Next;
476 UINT32 NextInstance = 0;
477 BOOLEAN Found = FALSE;
478
479
480 NewInfo = calloc (1, sizeof (OSL_TABLE_INFO));
481 if (!NewInfo)
482 {
483 return (AE_NO_MEMORY);
484 }
485
486 ACPI_COPY_NAMESEG (NewInfo->Signature, Signature);
487
488 if (!Gbl_TableListHead)
489 {
490 Gbl_TableListHead = NewInfo;
491 }
492 else
493 {
494 Next = Gbl_TableListHead;
495 while (1)
496 {
497 if (ACPI_COMPARE_NAMESEG (Next->Signature, Signature))
498 {
499 if (Next->Instance == Instance)
500 {
501 Found = TRUE;
502 }
503 if (Next->Instance >= NextInstance)
504 {
505 NextInstance = Next->Instance + 1;
506 }
507 }
508
509 if (!Next->Next)
510 {
511 break;
512 }
513 Next = Next->Next;
514 }
515 Next->Next = NewInfo;
516 }
517
518 if (Found)
519 {
520 if (Instance)
521 {
522 fprintf (stderr,
523 "%4.4s: Warning unmatched table instance %d, expected %d\n",
524 Signature, Instance, NextInstance);
525 }
526 Instance = NextInstance;
527 }
528
529 NewInfo->Instance = Instance;
530 Gbl_TableCount++;
531
532 return (AE_OK);
533 }
534
535
536 /******************************************************************************
537 *
538 * FUNCTION: AcpiOsGetTableByIndex
539 *
540 * PARAMETERS: Index - Which table to get
541 * Table - Where a pointer to the table is returned
542 * Instance - Where a pointer to the table instance no. is
543 * returned
544 * Address - Where the table physical address is returned
545 *
546 * RETURN: Status; Table buffer and physical address returned if AE_OK.
547 * AE_LIMIT: Index is beyond valid limit
548 *
549 * DESCRIPTION: Get an ACPI table via an index value (0 through n). Returns
550 * AE_LIMIT when an invalid index is reached. Index is not
551 * necessarily an index into the RSDT/XSDT.
552 *
553 *****************************************************************************/
554
555 ACPI_STATUS
AcpiOsGetTableByIndex(UINT32 Index,ACPI_TABLE_HEADER ** Table,UINT32 * Instance,ACPI_PHYSICAL_ADDRESS * Address)556 AcpiOsGetTableByIndex (
557 UINT32 Index,
558 ACPI_TABLE_HEADER **Table,
559 UINT32 *Instance,
560 ACPI_PHYSICAL_ADDRESS *Address)
561 {
562 OSL_TABLE_INFO *Info;
563 ACPI_STATUS Status;
564 UINT32 i;
565
566
567 /* Get main ACPI tables from memory on first invocation of this function */
568
569 Status = OslTableInitialize ();
570 if (ACPI_FAILURE (Status))
571 {
572 return (Status);
573 }
574
575 /* Validate Index */
576
577 if (Index >= Gbl_TableCount)
578 {
579 return (AE_LIMIT);
580 }
581
582 /* Point to the table list entry specified by the Index argument */
583
584 Info = Gbl_TableListHead;
585 for (i = 0; i < Index; i++)
586 {
587 Info = Info->Next;
588 }
589
590 /* Now we can just get the table via the signature */
591
592 Status = AcpiOsGetTableByName (Info->Signature, Info->Instance,
593 Table, Address);
594
595 if (ACPI_SUCCESS (Status))
596 {
597 *Instance = Info->Instance;
598 }
599 return (Status);
600 }
601
602
603 /******************************************************************************
604 *
605 * FUNCTION: OslFindRsdpViaEfiByKeyword
606 *
607 * PARAMETERS: Keyword - Character string indicating ACPI GUID version
608 * in the EFI table
609 *
610 * RETURN: RSDP address if found
611 *
612 * DESCRIPTION: Find RSDP address via EFI using keyword indicating the ACPI
613 * GUID version.
614 *
615 *****************************************************************************/
616
617 static ACPI_PHYSICAL_ADDRESS
OslFindRsdpViaEfiByKeyword(FILE * File,const char * Keyword)618 OslFindRsdpViaEfiByKeyword (
619 FILE *File,
620 const char *Keyword)
621 {
622 char Buffer[80];
623 unsigned long long Address = 0;
624 char Format[32];
625
626
627 snprintf (Format, 32, "%s=%s", Keyword, "%llx");
628 fseek (File, 0, SEEK_SET);
629 while (fgets (Buffer, 80, File))
630 {
631 if (sscanf (Buffer, Format, &Address) == 1)
632 {
633 break;
634 }
635 }
636
637 return ((ACPI_PHYSICAL_ADDRESS) (Address));
638 }
639
640
641 /******************************************************************************
642 *
643 * FUNCTION: OslFindRsdpViaEfi
644 *
645 * PARAMETERS: None
646 *
647 * RETURN: RSDP address if found
648 *
649 * DESCRIPTION: Find RSDP address via EFI.
650 *
651 *****************************************************************************/
652
653 static ACPI_PHYSICAL_ADDRESS
OslFindRsdpViaEfi(void)654 OslFindRsdpViaEfi (
655 void)
656 {
657 FILE *File;
658 ACPI_PHYSICAL_ADDRESS Address = 0;
659
660
661 File = fopen (EFI_SYSTAB, "r");
662 if (File)
663 {
664 Address = OslFindRsdpViaEfiByKeyword (File, "ACPI20");
665 if (!Address)
666 {
667 Address = OslFindRsdpViaEfiByKeyword (File, "ACPI");
668 }
669 fclose (File);
670 }
671
672 return (Address);
673 }
674
675
676 /******************************************************************************
677 *
678 * FUNCTION: OslLoadRsdp
679 *
680 * PARAMETERS: None
681 *
682 * RETURN: Status
683 *
684 * DESCRIPTION: Scan and load RSDP.
685 *
686 *****************************************************************************/
687
688 static ACPI_STATUS
OslLoadRsdp(void)689 OslLoadRsdp (
690 void)
691 {
692 ACPI_TABLE_HEADER *MappedTable;
693 UINT8 *RsdpAddress;
694 ACPI_PHYSICAL_ADDRESS RsdpBase;
695 ACPI_SIZE RsdpSize;
696
697
698 /* Get RSDP from memory */
699
700 RsdpSize = sizeof (ACPI_TABLE_RSDP);
701 if (Gbl_RsdpBase)
702 {
703 RsdpBase = Gbl_RsdpBase;
704 }
705 else
706 {
707 RsdpBase = OslFindRsdpViaEfi ();
708 }
709
710 if (!RsdpBase)
711 {
712 RsdpBase = ACPI_HI_RSDP_WINDOW_BASE;
713 RsdpSize = ACPI_HI_RSDP_WINDOW_SIZE;
714 }
715
716 RsdpAddress = AcpiOsMapMemory (RsdpBase, RsdpSize);
717 if (!RsdpAddress)
718 {
719 return (OslGetLastStatus (AE_BAD_ADDRESS));
720 }
721
722 /* Search low memory for the RSDP */
723
724 MappedTable = ACPI_CAST_PTR (ACPI_TABLE_HEADER,
725 AcpiTbScanMemoryForRsdp (RsdpAddress, RsdpSize));
726 if (!MappedTable)
727 {
728 AcpiOsUnmapMemory (RsdpAddress, RsdpSize);
729 return (AE_NOT_FOUND);
730 }
731
732 Gbl_RsdpAddress = RsdpBase + (ACPI_CAST8 (MappedTable) - RsdpAddress);
733
734 memcpy (&Gbl_Rsdp, MappedTable, sizeof (ACPI_TABLE_RSDP));
735 AcpiOsUnmapMemory (RsdpAddress, RsdpSize);
736
737 return (AE_OK);
738 }
739
740
741 /******************************************************************************
742 *
743 * FUNCTION: OslCanUseXsdt
744 *
745 * PARAMETERS: None
746 *
747 * RETURN: TRUE if XSDT is allowed to be used.
748 *
749 * DESCRIPTION: This function collects logic that can be used to determine if
750 * XSDT should be used instead of RSDT.
751 *
752 *****************************************************************************/
753
754 static BOOLEAN
OslCanUseXsdt(void)755 OslCanUseXsdt (
756 void)
757 {
758 if (Gbl_Revision && !AcpiGbl_DoNotUseXsdt)
759 {
760 return (TRUE);
761 }
762 else
763 {
764 return (FALSE);
765 }
766 }
767
768
769 /******************************************************************************
770 *
771 * FUNCTION: OslTableInitialize
772 *
773 * PARAMETERS: None
774 *
775 * RETURN: Status
776 *
777 * DESCRIPTION: Initialize ACPI table data. Get and store main ACPI tables to
778 * local variables. Main ACPI tables include RSDT, FADT, RSDT,
779 * and/or XSDT.
780 *
781 *****************************************************************************/
782
783 static ACPI_STATUS
OslTableInitialize(void)784 OslTableInitialize (
785 void)
786 {
787 ACPI_STATUS Status;
788 ACPI_PHYSICAL_ADDRESS Address;
789
790
791 if (Gbl_TableListInitialized)
792 {
793 return (AE_OK);
794 }
795
796 if (!Gbl_DumpCustomizedTables)
797 {
798 /* Get RSDP from memory */
799
800 Status = OslLoadRsdp ();
801 if (ACPI_FAILURE (Status))
802 {
803 return (Status);
804 }
805
806 /* Get XSDT from memory */
807
808 if (Gbl_Rsdp.Revision && !Gbl_DoNotDumpXsdt)
809 {
810 if (Gbl_Xsdt)
811 {
812 free (Gbl_Xsdt);
813 Gbl_Xsdt = NULL;
814 }
815
816 Gbl_Revision = 2;
817 Status = OslGetBiosTable (ACPI_SIG_XSDT, 0,
818 ACPI_CAST_PTR (ACPI_TABLE_HEADER *, &Gbl_Xsdt), &Address);
819 if (ACPI_FAILURE (Status))
820 {
821 return (Status);
822 }
823 }
824
825 /* Get RSDT from memory */
826
827 if (Gbl_Rsdp.RsdtPhysicalAddress)
828 {
829 if (Gbl_Rsdt)
830 {
831 free (Gbl_Rsdt);
832 Gbl_Rsdt = NULL;
833 }
834
835 Status = OslGetBiosTable (ACPI_SIG_RSDT, 0,
836 ACPI_CAST_PTR (ACPI_TABLE_HEADER *, &Gbl_Rsdt), &Address);
837 if (ACPI_FAILURE (Status))
838 {
839 return (Status);
840 }
841 }
842
843 /* Get FADT from memory */
844
845 if (Gbl_Fadt)
846 {
847 free (Gbl_Fadt);
848 Gbl_Fadt = NULL;
849 }
850
851 Status = OslGetBiosTable (ACPI_SIG_FADT, 0,
852 ACPI_CAST_PTR (ACPI_TABLE_HEADER *, &Gbl_Fadt), &Gbl_FadtAddress);
853 if (ACPI_FAILURE (Status))
854 {
855 return (Status);
856 }
857
858 /* Add mandatory tables to global table list first */
859
860 Status = OslAddTableToList (ACPI_RSDP_NAME, 0);
861 if (ACPI_FAILURE (Status))
862 {
863 return (Status);
864 }
865
866 Status = OslAddTableToList (ACPI_SIG_RSDT, 0);
867 if (ACPI_FAILURE (Status))
868 {
869 return (Status);
870 }
871
872 if (Gbl_Revision == 2)
873 {
874 Status = OslAddTableToList (ACPI_SIG_XSDT, 0);
875 if (ACPI_FAILURE (Status))
876 {
877 return (Status);
878 }
879 }
880
881 Status = OslAddTableToList (ACPI_SIG_DSDT, 0);
882 if (ACPI_FAILURE (Status))
883 {
884 return (Status);
885 }
886
887 Status = OslAddTableToList (ACPI_SIG_FACS, 0);
888 if (ACPI_FAILURE (Status))
889 {
890 return (Status);
891 }
892
893 /* Add all tables found in the memory */
894
895 Status = OslListBiosTables ();
896 if (ACPI_FAILURE (Status))
897 {
898 return (Status);
899 }
900 }
901 else
902 {
903 /* Add all tables found in the static directory */
904
905 Status = OslListCustomizedTables (STATIC_TABLE_DIR);
906 if (ACPI_FAILURE (Status))
907 {
908 return (Status);
909 }
910 }
911
912 if (Gbl_DumpDynamicTables)
913 {
914 /* Add all dynamically loaded tables in the dynamic directory */
915
916 Status = OslListCustomizedTables (DYNAMIC_TABLE_DIR);
917 if (ACPI_FAILURE (Status))
918 {
919 return (Status);
920 }
921 }
922
923 Gbl_TableListInitialized = TRUE;
924 return (AE_OK);
925 }
926
927
928 /******************************************************************************
929 *
930 * FUNCTION: OslListBiosTables
931 *
932 * PARAMETERS: None
933 *
934 * RETURN: Status; Table list is initialized if AE_OK.
935 *
936 * DESCRIPTION: Add ACPI tables to the table list from memory.
937 *
938 * NOTE: This works on Linux as table customization does not modify the
939 * addresses stored in RSDP/RSDT/XSDT/FADT.
940 *
941 *****************************************************************************/
942
943 static ACPI_STATUS
OslListBiosTables(void)944 OslListBiosTables (
945 void)
946 {
947 ACPI_TABLE_HEADER *MappedTable = NULL;
948 UINT8 *TableData;
949 UINT8 NumberOfTables;
950 UINT8 ItemSize;
951 ACPI_PHYSICAL_ADDRESS TableAddress = 0;
952 ACPI_STATUS Status = AE_OK;
953 UINT32 i;
954
955
956 if (OslCanUseXsdt ())
957 {
958 ItemSize = sizeof (UINT64);
959 TableData = ACPI_CAST8 (Gbl_Xsdt) + sizeof (ACPI_TABLE_HEADER);
960 NumberOfTables =
961 (UINT8) ((Gbl_Xsdt->Header.Length - sizeof (ACPI_TABLE_HEADER))
962 / ItemSize);
963 }
964 else /* Use RSDT if XSDT is not available */
965 {
966 ItemSize = sizeof (UINT32);
967 TableData = ACPI_CAST8 (Gbl_Rsdt) + sizeof (ACPI_TABLE_HEADER);
968 NumberOfTables =
969 (UINT8) ((Gbl_Rsdt->Header.Length - sizeof (ACPI_TABLE_HEADER))
970 / ItemSize);
971 }
972
973 /* Search RSDT/XSDT for the requested table */
974
975 for (i = 0; i < NumberOfTables; ++i, TableData += ItemSize)
976 {
977 if (OslCanUseXsdt ())
978 {
979 TableAddress =
980 (ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST64 (TableData));
981 }
982 else
983 {
984 TableAddress =
985 (ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST32 (TableData));
986 }
987
988 /* Skip NULL entries in RSDT/XSDT */
989
990 if (TableAddress == 0)
991 {
992 continue;
993 }
994
995 Status = OslMapTable (TableAddress, NULL, &MappedTable);
996 if (ACPI_FAILURE (Status))
997 {
998 return (Status);
999 }
1000
1001 OslAddTableToList (MappedTable->Signature, 0);
1002 OslUnmapTable (MappedTable);
1003 }
1004
1005 return (AE_OK);
1006 }
1007
1008
1009 /******************************************************************************
1010 *
1011 * FUNCTION: OslGetBiosTable
1012 *
1013 * PARAMETERS: Signature - ACPI Signature for common table. Must be
1014 * a null terminated 4-character string.
1015 * Instance - Multiple table support for SSDT/UEFI (0...n)
1016 * Must be 0 for other tables.
1017 * Table - Where a pointer to the table is returned
1018 * Address - Where the table physical address is returned
1019 *
1020 * RETURN: Status; Table buffer and physical address returned if AE_OK.
1021 * AE_LIMIT: Instance is beyond valid limit
1022 * AE_NOT_FOUND: A table with the signature was not found
1023 *
1024 * DESCRIPTION: Get a BIOS provided ACPI table
1025 *
1026 * NOTE: Assumes the input signature is uppercase.
1027 *
1028 *****************************************************************************/
1029
1030 static ACPI_STATUS
OslGetBiosTable(char * Signature,UINT32 Instance,ACPI_TABLE_HEADER ** Table,ACPI_PHYSICAL_ADDRESS * Address)1031 OslGetBiosTable (
1032 char *Signature,
1033 UINT32 Instance,
1034 ACPI_TABLE_HEADER **Table,
1035 ACPI_PHYSICAL_ADDRESS *Address)
1036 {
1037 ACPI_TABLE_HEADER *LocalTable = NULL;
1038 ACPI_TABLE_HEADER *MappedTable = NULL;
1039 UINT8 *TableData;
1040 UINT8 NumberOfTables;
1041 UINT8 ItemSize;
1042 UINT32 CurrentInstance = 0;
1043 ACPI_PHYSICAL_ADDRESS TableAddress;
1044 ACPI_PHYSICAL_ADDRESS FirstTableAddress = 0;
1045 UINT32 TableLength = 0;
1046 ACPI_STATUS Status = AE_OK;
1047 UINT32 i;
1048
1049
1050 /* Handle special tables whose addresses are not in RSDT/XSDT */
1051
1052 if (ACPI_COMPARE_NAMESEG (Signature, ACPI_RSDP_NAME) ||
1053 ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_RSDT) ||
1054 ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_XSDT) ||
1055 ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_DSDT) ||
1056 ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_FACS))
1057 {
1058
1059 FindNextInstance:
1060
1061 TableAddress = 0;
1062
1063 /*
1064 * Get the appropriate address, either 32-bit or 64-bit. Be very
1065 * careful about the FADT length and validate table addresses.
1066 * Note: The 64-bit addresses have priority.
1067 */
1068 if (ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_DSDT))
1069 {
1070 if (CurrentInstance < 2)
1071 {
1072 if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_XDSDT) &&
1073 Gbl_Fadt->XDsdt && CurrentInstance == 0)
1074 {
1075 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->XDsdt;
1076 }
1077 else if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_DSDT) &&
1078 Gbl_Fadt->Dsdt != FirstTableAddress)
1079 {
1080 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->Dsdt;
1081 }
1082 }
1083 }
1084 else if (ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_FACS))
1085 {
1086 if (CurrentInstance < 2)
1087 {
1088 if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_XFACS) &&
1089 Gbl_Fadt->XFacs && CurrentInstance == 0)
1090 {
1091 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->XFacs;
1092 }
1093 else if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_FACS) &&
1094 Gbl_Fadt->Facs != FirstTableAddress)
1095 {
1096 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->Facs;
1097 }
1098 }
1099 }
1100 else if (ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_XSDT))
1101 {
1102 if (!Gbl_Revision)
1103 {
1104 return (AE_BAD_SIGNATURE);
1105 }
1106 if (CurrentInstance == 0)
1107 {
1108 TableAddress =
1109 (ACPI_PHYSICAL_ADDRESS) Gbl_Rsdp.XsdtPhysicalAddress;
1110 }
1111 }
1112 else if (ACPI_COMPARE_NAMESEG (Signature, ACPI_SIG_RSDT))
1113 {
1114 if (CurrentInstance == 0)
1115 {
1116 TableAddress =
1117 (ACPI_PHYSICAL_ADDRESS) Gbl_Rsdp.RsdtPhysicalAddress;
1118 }
1119 }
1120 else
1121 {
1122 if (CurrentInstance == 0)
1123 {
1124 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_RsdpAddress;
1125 Signature = ACPI_SIG_RSDP;
1126 }
1127 }
1128
1129 if (TableAddress == 0)
1130 {
1131 goto ExitFindTable;
1132 }
1133
1134 /* Now we can get the requested special table */
1135
1136 Status = OslMapTable (TableAddress, Signature, &MappedTable);
1137 if (ACPI_FAILURE (Status))
1138 {
1139 return (Status);
1140 }
1141
1142 TableLength = ApGetTableLength (MappedTable);
1143 if (FirstTableAddress == 0)
1144 {
1145 FirstTableAddress = TableAddress;
1146 }
1147
1148 /* Match table instance */
1149
1150 if (CurrentInstance != Instance)
1151 {
1152 OslUnmapTable (MappedTable);
1153 MappedTable = NULL;
1154 CurrentInstance++;
1155 goto FindNextInstance;
1156 }
1157 }
1158 else /* Case for a normal ACPI table */
1159 {
1160 if (OslCanUseXsdt ())
1161 {
1162 ItemSize = sizeof (UINT64);
1163 TableData = ACPI_CAST8 (Gbl_Xsdt) + sizeof (ACPI_TABLE_HEADER);
1164 NumberOfTables =
1165 (UINT8) ((Gbl_Xsdt->Header.Length - sizeof (ACPI_TABLE_HEADER))
1166 / ItemSize);
1167 }
1168 else /* Use RSDT if XSDT is not available */
1169 {
1170 ItemSize = sizeof (UINT32);
1171 TableData = ACPI_CAST8 (Gbl_Rsdt) + sizeof (ACPI_TABLE_HEADER);
1172 NumberOfTables =
1173 (UINT8) ((Gbl_Rsdt->Header.Length - sizeof (ACPI_TABLE_HEADER))
1174 / ItemSize);
1175 }
1176
1177 /* Search RSDT/XSDT for the requested table */
1178
1179 for (i = 0; i < NumberOfTables; ++i, TableData += ItemSize)
1180 {
1181 if (OslCanUseXsdt ())
1182 {
1183 TableAddress =
1184 (ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST64 (TableData));
1185 }
1186 else
1187 {
1188 TableAddress =
1189 (ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST32 (TableData));
1190 }
1191
1192 /* Skip NULL entries in RSDT/XSDT */
1193
1194 if (TableAddress == 0)
1195 {
1196 continue;
1197 }
1198
1199 Status = OslMapTable (TableAddress, NULL, &MappedTable);
1200 if (ACPI_FAILURE (Status))
1201 {
1202 return (Status);
1203 }
1204 TableLength = MappedTable->Length;
1205
1206 /* Does this table match the requested signature? */
1207
1208 if (!ACPI_COMPARE_NAMESEG (MappedTable->Signature, Signature))
1209 {
1210 OslUnmapTable (MappedTable);
1211 MappedTable = NULL;
1212 continue;
1213 }
1214
1215 /* Match table instance (for SSDT/UEFI tables) */
1216
1217 if (CurrentInstance != Instance)
1218 {
1219 OslUnmapTable (MappedTable);
1220 MappedTable = NULL;
1221 CurrentInstance++;
1222 continue;
1223 }
1224
1225 break;
1226 }
1227 }
1228
1229 ExitFindTable:
1230
1231 if (!MappedTable)
1232 {
1233 return (AE_LIMIT);
1234 }
1235
1236 if (TableLength == 0)
1237 {
1238 Status = AE_BAD_HEADER;
1239 goto Exit;
1240 }
1241
1242 /* Copy table to local buffer and return it */
1243
1244 LocalTable = calloc (1, TableLength);
1245 if (!LocalTable)
1246 {
1247 Status = AE_NO_MEMORY;
1248 goto Exit;
1249 }
1250
1251 memcpy (LocalTable, MappedTable, TableLength);
1252 *Address = TableAddress;
1253 *Table = LocalTable;
1254
1255 Exit:
1256 OslUnmapTable (MappedTable);
1257 return (Status);
1258 }
1259
1260
1261 /******************************************************************************
1262 *
1263 * FUNCTION: OslListCustomizedTables
1264 *
1265 * PARAMETERS: Directory - Directory that contains the tables
1266 *
1267 * RETURN: Status; Table list is initialized if AE_OK.
1268 *
1269 * DESCRIPTION: Add ACPI tables to the table list from a directory.
1270 *
1271 *****************************************************************************/
1272
1273 static ACPI_STATUS
OslListCustomizedTables(char * Directory)1274 OslListCustomizedTables (
1275 char *Directory)
1276 {
1277 void *TableDir;
1278 UINT32 Instance;
1279 char TempName[ACPI_NAMESEG_SIZE];
1280 char *Filename;
1281 ACPI_STATUS Status = AE_OK;
1282
1283
1284 /* Open the requested directory */
1285
1286 TableDir = AcpiOsOpenDirectory (Directory, "*", REQUEST_FILE_ONLY);
1287 if (!TableDir)
1288 {
1289 return (OslGetLastStatus (AE_NOT_FOUND));
1290 }
1291
1292 /* Examine all entries in this directory */
1293
1294 while ((Filename = AcpiOsGetNextFilename (TableDir)))
1295 {
1296 /* Extract table name and instance number */
1297
1298 Status = OslTableNameFromFile (Filename, TempName, &Instance);
1299
1300 /* Ignore meaningless files */
1301
1302 if (ACPI_FAILURE (Status))
1303 {
1304 continue;
1305 }
1306
1307 /* Add new info node to global table list */
1308
1309 Status = OslAddTableToList (TempName, Instance);
1310 if (ACPI_FAILURE (Status))
1311 {
1312 break;
1313 }
1314 }
1315
1316 AcpiOsCloseDirectory (TableDir);
1317 return (Status);
1318 }
1319
1320
1321 /******************************************************************************
1322 *
1323 * FUNCTION: OslMapTable
1324 *
1325 * PARAMETERS: Address - Address of the table in memory
1326 * Signature - Optional ACPI Signature for desired table.
1327 * Null terminated 4-character string.
1328 * Table - Where a pointer to the mapped table is
1329 * returned
1330 *
1331 * RETURN: Status; Mapped table is returned if AE_OK.
1332 * AE_NOT_FOUND: A valid table was not found at the address
1333 *
1334 * DESCRIPTION: Map entire ACPI table into caller's address space.
1335 *
1336 *****************************************************************************/
1337
1338 static ACPI_STATUS
OslMapTable(ACPI_SIZE Address,char * Signature,ACPI_TABLE_HEADER ** Table)1339 OslMapTable (
1340 ACPI_SIZE Address,
1341 char *Signature,
1342 ACPI_TABLE_HEADER **Table)
1343 {
1344 ACPI_TABLE_HEADER *MappedTable;
1345 UINT32 Length;
1346
1347
1348 if (!Address)
1349 {
1350 return (AE_BAD_ADDRESS);
1351 }
1352
1353 /*
1354 * Map the header so we can get the table length.
1355 * Use sizeof (ACPI_TABLE_HEADER) as:
1356 * 1. it is bigger than 24 to include RSDP->Length
1357 * 2. it is smaller than sizeof (ACPI_TABLE_RSDP)
1358 */
1359 MappedTable = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
1360 if (!MappedTable)
1361 {
1362 fprintf (stderr, "Could not map table header at 0x%8.8X%8.8X\n",
1363 ACPI_FORMAT_UINT64 (Address));
1364 return (OslGetLastStatus (AE_BAD_ADDRESS));
1365 }
1366
1367 /* If specified, signature must match */
1368
1369 if (Signature)
1370 {
1371 if (ACPI_VALIDATE_RSDP_SIG (Signature))
1372 {
1373 if (!ACPI_VALIDATE_RSDP_SIG (MappedTable->Signature))
1374 {
1375 AcpiOsUnmapMemory (MappedTable, sizeof (ACPI_TABLE_HEADER));
1376 return (AE_BAD_SIGNATURE);
1377 }
1378 }
1379 else if (!ACPI_COMPARE_NAMESEG (Signature, MappedTable->Signature))
1380 {
1381 AcpiOsUnmapMemory (MappedTable, sizeof (ACPI_TABLE_HEADER));
1382 return (AE_BAD_SIGNATURE);
1383 }
1384 }
1385
1386 /* Map the entire table */
1387
1388 Length = ApGetTableLength (MappedTable);
1389 AcpiOsUnmapMemory (MappedTable, sizeof (ACPI_TABLE_HEADER));
1390 if (Length == 0)
1391 {
1392 return (AE_BAD_HEADER);
1393 }
1394
1395 MappedTable = AcpiOsMapMemory (Address, Length);
1396 if (!MappedTable)
1397 {
1398 fprintf (stderr, "Could not map table at 0x%8.8X%8.8X length %8.8X\n",
1399 ACPI_FORMAT_UINT64 (Address), Length);
1400 return (OslGetLastStatus (AE_INVALID_TABLE_LENGTH));
1401 }
1402
1403 (void) ApIsValidChecksum (MappedTable);
1404
1405 *Table = MappedTable;
1406 return (AE_OK);
1407 }
1408
1409
1410 /******************************************************************************
1411 *
1412 * FUNCTION: OslUnmapTable
1413 *
1414 * PARAMETERS: Table - A pointer to the mapped table
1415 *
1416 * RETURN: None
1417 *
1418 * DESCRIPTION: Unmap entire ACPI table.
1419 *
1420 *****************************************************************************/
1421
1422 static void
OslUnmapTable(ACPI_TABLE_HEADER * Table)1423 OslUnmapTable (
1424 ACPI_TABLE_HEADER *Table)
1425 {
1426 if (Table)
1427 {
1428 AcpiOsUnmapMemory (Table, ApGetTableLength (Table));
1429 }
1430 }
1431
1432
1433 /******************************************************************************
1434 *
1435 * FUNCTION: OslTableNameFromFile
1436 *
1437 * PARAMETERS: Filename - File that contains the desired table
1438 * Signature - Pointer to 4-character buffer to store
1439 * extracted table signature.
1440 * Instance - Pointer to integer to store extracted
1441 * table instance number.
1442 *
1443 * RETURN: Status; Table name is extracted if AE_OK.
1444 *
1445 * DESCRIPTION: Extract table signature and instance number from a table file
1446 * name.
1447 *
1448 *****************************************************************************/
1449
1450 static ACPI_STATUS
OslTableNameFromFile(char * Filename,char * Signature,UINT32 * Instance)1451 OslTableNameFromFile (
1452 char *Filename,
1453 char *Signature,
1454 UINT32 *Instance)
1455 {
1456
1457 /* Ignore meaningless files */
1458
1459 if (strlen (Filename) < ACPI_NAMESEG_SIZE)
1460 {
1461 return (AE_BAD_SIGNATURE);
1462 }
1463
1464 /* Extract instance number */
1465
1466 if (isdigit ((int) Filename[ACPI_NAMESEG_SIZE]))
1467 {
1468 sscanf (&Filename[ACPI_NAMESEG_SIZE], "%u", Instance);
1469 }
1470 else if (strlen (Filename) != ACPI_NAMESEG_SIZE)
1471 {
1472 return (AE_BAD_SIGNATURE);
1473 }
1474 else
1475 {
1476 *Instance = 0;
1477 }
1478
1479 /* Extract signature */
1480
1481 ACPI_COPY_NAMESEG (Signature, Filename);
1482 return (AE_OK);
1483 }
1484
1485
1486 /******************************************************************************
1487 *
1488 * FUNCTION: OslReadTableFromFile
1489 *
1490 * PARAMETERS: Filename - File that contains the desired table
1491 * FileOffset - Offset of the table in file
1492 * Table - Where a pointer to the table is returned
1493 *
1494 * RETURN: Status; Table buffer is returned if AE_OK.
1495 *
1496 * DESCRIPTION: Read a ACPI table from a file.
1497 *
1498 *****************************************************************************/
1499
1500 static ACPI_STATUS
OslReadTableFromFile(char * Filename,ACPI_SIZE FileOffset,ACPI_TABLE_HEADER ** Table)1501 OslReadTableFromFile (
1502 char *Filename,
1503 ACPI_SIZE FileOffset,
1504 ACPI_TABLE_HEADER **Table)
1505 {
1506 FILE *TableFile;
1507 ACPI_TABLE_HEADER Header;
1508 ACPI_TABLE_HEADER *LocalTable = NULL;
1509 UINT32 TableLength;
1510 INT32 Count;
1511 ACPI_STATUS Status = AE_OK;
1512
1513
1514 /* Open the file */
1515
1516 TableFile = fopen (Filename, "rb");
1517 if (TableFile == NULL)
1518 {
1519 fprintf (stderr, "Could not open table file: %s\n", Filename);
1520 return (OslGetLastStatus (AE_NOT_FOUND));
1521 }
1522
1523 fseek (TableFile, FileOffset, SEEK_SET);
1524
1525 /* Read the Table header to get the table length */
1526
1527 Count = fread (&Header, 1, sizeof (ACPI_TABLE_HEADER), TableFile);
1528 if (Count != sizeof (ACPI_TABLE_HEADER))
1529 {
1530 fprintf (stderr, "Could not read table header: %s\n", Filename);
1531 Status = AE_BAD_HEADER;
1532 goto Exit;
1533 }
1534
1535 #ifdef ACPI_OBSOLETE_FUNCTIONS
1536
1537 /* If signature is specified, it must match the table */
1538
1539 if (Signature)
1540 {
1541 if (ACPI_VALIDATE_RSDP_SIG (Signature))
1542 {
1543 if (!ACPI_VALIDATE_RSDP_SIG (Header.Signature)) {
1544 fprintf (stderr, "Incorrect RSDP signature: found %8.8s\n",
1545 Header.Signature);
1546 Status = AE_BAD_SIGNATURE;
1547 goto Exit;
1548 }
1549 }
1550 else if (!ACPI_COMPARE_NAMESEG (Signature, Header.Signature))
1551 {
1552 fprintf (stderr, "Incorrect signature: Expecting %4.4s, found %4.4s\n",
1553 Signature, Header.Signature);
1554 Status = AE_BAD_SIGNATURE;
1555 goto Exit;
1556 }
1557 }
1558 #endif
1559
1560 TableLength = ApGetTableLength (&Header);
1561 if (TableLength == 0)
1562 {
1563 Status = AE_BAD_HEADER;
1564 goto Exit;
1565 }
1566
1567 /* Read the entire table into a local buffer */
1568
1569 LocalTable = calloc (1, TableLength);
1570 if (!LocalTable)
1571 {
1572 fprintf (stderr,
1573 "%4.4s: Could not allocate buffer for table of length %X\n",
1574 Header.Signature, TableLength);
1575 Status = AE_NO_MEMORY;
1576 goto Exit;
1577 }
1578
1579 fseek (TableFile, FileOffset, SEEK_SET);
1580
1581 Count = fread (LocalTable, 1, TableLength, TableFile);
1582 if (Count != TableLength)
1583 {
1584 fprintf (stderr, "%4.4s: Could not read table content\n",
1585 Header.Signature);
1586 Status = AE_INVALID_TABLE_LENGTH;
1587 goto Exit;
1588 }
1589
1590 /* Validate checksum */
1591
1592 (void) ApIsValidChecksum (LocalTable);
1593
1594 Exit:
1595 fclose (TableFile);
1596 *Table = LocalTable;
1597 return (Status);
1598 }
1599
1600
1601 /******************************************************************************
1602 *
1603 * FUNCTION: OslGetCustomizedTable
1604 *
1605 * PARAMETERS: Pathname - Directory to find Linux customized table
1606 * Signature - ACPI Signature for desired table. Must be
1607 * a null terminated 4-character string.
1608 * Instance - Multiple table support for SSDT/UEFI (0...n)
1609 * Must be 0 for other tables.
1610 * Table - Where a pointer to the table is returned
1611 * Address - Where the table physical address is returned
1612 *
1613 * RETURN: Status; Table buffer is returned if AE_OK.
1614 * AE_LIMIT: Instance is beyond valid limit
1615 * AE_NOT_FOUND: A table with the signature was not found
1616 *
1617 * DESCRIPTION: Get an OS customized table.
1618 *
1619 *****************************************************************************/
1620
1621 static ACPI_STATUS
OslGetCustomizedTable(char * Pathname,char * Signature,UINT32 Instance,ACPI_TABLE_HEADER ** Table,ACPI_PHYSICAL_ADDRESS * Address)1622 OslGetCustomizedTable (
1623 char *Pathname,
1624 char *Signature,
1625 UINT32 Instance,
1626 ACPI_TABLE_HEADER **Table,
1627 ACPI_PHYSICAL_ADDRESS *Address)
1628 {
1629 void *TableDir;
1630 UINT32 CurrentInstance = 0;
1631 char TempName[ACPI_NAMESEG_SIZE];
1632 char TableFilename[PATH_MAX];
1633 char *Filename;
1634 ACPI_STATUS Status;
1635
1636
1637 /* Open the directory for customized tables */
1638
1639 TableDir = AcpiOsOpenDirectory (Pathname, "*", REQUEST_FILE_ONLY);
1640 if (!TableDir)
1641 {
1642 return (OslGetLastStatus (AE_NOT_FOUND));
1643 }
1644
1645 /* Attempt to find the table in the directory */
1646
1647 while ((Filename = AcpiOsGetNextFilename (TableDir)))
1648 {
1649 /* Ignore meaningless files */
1650
1651 if (!ACPI_COMPARE_NAMESEG (Filename, Signature))
1652 {
1653 continue;
1654 }
1655
1656 /* Extract table name and instance number */
1657
1658 Status = OslTableNameFromFile (Filename, TempName, &CurrentInstance);
1659
1660 /* Ignore meaningless files */
1661
1662 if (ACPI_FAILURE (Status) || CurrentInstance != Instance)
1663 {
1664 continue;
1665 }
1666
1667 /* Create the table pathname */
1668
1669 if (Instance != 0)
1670 {
1671 sprintf (TableFilename, "%s/%4.4s%d", Pathname, TempName, Instance);
1672 }
1673 else
1674 {
1675 sprintf (TableFilename, "%s/%4.4s", Pathname, TempName);
1676 }
1677 break;
1678 }
1679
1680 AcpiOsCloseDirectory (TableDir);
1681
1682 if (!Filename)
1683 {
1684 return (AE_LIMIT);
1685 }
1686
1687 /* There is no physical address saved for customized tables, use zero */
1688
1689 *Address = 0;
1690 Status = OslReadTableFromFile (TableFilename, 0, Table);
1691
1692 return (Status);
1693 }
1694
