1 /******************************************************************************
2  *
3  * Module Name: hwxface - Public ACPICA hardware interfaces
4  *
5  *****************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2018, 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 #define EXPORT_ACPI_INTERFACES
153 
154 #include "acpi.h"
155 #include "accommon.h"
156 #include "acnamesp.h"
157 
158 #define _COMPONENT          ACPI_HARDWARE
159         ACPI_MODULE_NAME    ("hwxface")
160 
161 
162 /******************************************************************************
163  *
164  * FUNCTION:    AcpiReset
165  *
166  * PARAMETERS:  None
167  *
168  * RETURN:      Status
169  *
170  * DESCRIPTION: Set reset register in memory or IO space. Note: Does not
171  *              support reset register in PCI config space, this must be
172  *              handled separately.
173  *
174  ******************************************************************************/
175 
176 ACPI_STATUS
AcpiReset(void)177 AcpiReset (
178     void)
179 {
180     ACPI_GENERIC_ADDRESS    *ResetReg;
181     ACPI_STATUS             Status;
182 
183 
184     ACPI_FUNCTION_TRACE (AcpiReset);
185 
186 
187     ResetReg = &AcpiGbl_FADT.ResetRegister;
188 
189     /* Check if the reset register is supported */
190 
191     if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) ||
192         !ResetReg->Address)
193     {
194         return_ACPI_STATUS (AE_NOT_EXIST);
195     }
196 
197     if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO)
198     {
199         /*
200          * For I/O space, write directly to the OSL. This bypasses the port
201          * validation mechanism, which may block a valid write to the reset
202          * register.
203          *
204          * NOTE:
205          * The ACPI spec requires the reset register width to be 8, so we
206          * hardcode it here and ignore the FADT value. This maintains
207          * compatibility with other ACPI implementations that have allowed
208          * BIOS code with bad register width values to go unnoticed.
209          */
210         Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
211             AcpiGbl_FADT.ResetValue, ACPI_RESET_REGISTER_WIDTH);
212     }
213     else
214     {
215         /* Write the reset value to the reset register */
216 
217         Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg);
218     }
219 
220     return_ACPI_STATUS (Status);
221 }
222 
ACPI_EXPORT_SYMBOL(AcpiReset)223 ACPI_EXPORT_SYMBOL (AcpiReset)
224 
225 
226 /******************************************************************************
227  *
228  * FUNCTION:    AcpiRead
229  *
230  * PARAMETERS:  Value               - Where the value is returned
231  *              Reg                 - GAS register structure
232  *
233  * RETURN:      Status
234  *
235  * DESCRIPTION: Read from either memory or IO space.
236  *
237  * LIMITATIONS: <These limitations also apply to AcpiWrite>
238  *      BitWidth must be exactly 8, 16, 32, or 64.
239  *      SpaceID must be SystemMemory or SystemIO.
240  *      BitOffset and AccessWidth are currently ignored, as there has
241  *          not been a need to implement these.
242  *
243  ******************************************************************************/
244 
245 ACPI_STATUS
246 AcpiRead (
247     UINT64                  *ReturnValue,
248     ACPI_GENERIC_ADDRESS    *Reg)
249 {
250     ACPI_STATUS             Status;
251 
252 
253     ACPI_FUNCTION_NAME (AcpiRead);
254 
255 
256     Status = AcpiHwRead (ReturnValue, Reg);
257     return (Status);
258 }
259 
ACPI_EXPORT_SYMBOL(AcpiRead)260 ACPI_EXPORT_SYMBOL (AcpiRead)
261 
262 
263 /******************************************************************************
264  *
265  * FUNCTION:    AcpiWrite
266  *
267  * PARAMETERS:  Value               - Value to be written
268  *              Reg                 - GAS register structure
269  *
270  * RETURN:      Status
271  *
272  * DESCRIPTION: Write to either memory or IO space.
273  *
274  ******************************************************************************/
275 
276 ACPI_STATUS
277 AcpiWrite (
278     UINT64                  Value,
279     ACPI_GENERIC_ADDRESS    *Reg)
280 {
281     ACPI_STATUS             Status;
282 
283 
284     ACPI_FUNCTION_NAME (AcpiWrite);
285 
286 
287     Status = AcpiHwWrite (Value, Reg);
288     return (Status);
289 }
290 
ACPI_EXPORT_SYMBOL(AcpiWrite)291 ACPI_EXPORT_SYMBOL (AcpiWrite)
292 
293 
294 #if (!ACPI_REDUCED_HARDWARE)
295 /*******************************************************************************
296  *
297  * FUNCTION:    AcpiReadBitRegister
298  *
299  * PARAMETERS:  RegisterId      - ID of ACPI Bit Register to access
300  *              ReturnValue     - Value that was read from the register,
301  *                                normalized to bit position zero.
302  *
303  * RETURN:      Status and the value read from the specified Register. Value
304  *              returned is normalized to bit0 (is shifted all the way right)
305  *
306  * DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock.
307  *
308  * SUPPORTS:    Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
309  *              PM2 Control.
310  *
311  * Note: The hardware lock is not required when reading the ACPI bit registers
312  *       since almost all of them are single bit and it does not matter that
313  *       the parent hardware register can be split across two physical
314  *       registers. The only multi-bit field is SLP_TYP in the PM1 control
315  *       register, but this field does not cross an 8-bit boundary (nor does
316  *       it make much sense to actually read this field.)
317  *
318  ******************************************************************************/
319 
320 ACPI_STATUS
321 AcpiReadBitRegister (
322     UINT32                  RegisterId,
323     UINT32                  *ReturnValue)
324 {
325     ACPI_BIT_REGISTER_INFO  *BitRegInfo;
326     UINT32                  RegisterValue;
327     UINT32                  Value;
328     ACPI_STATUS             Status;
329 
330 
331     ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId);
332 
333 
334     /* Get the info structure corresponding to the requested ACPI Register */
335 
336     BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
337     if (!BitRegInfo)
338     {
339         return_ACPI_STATUS (AE_BAD_PARAMETER);
340     }
341 
342     /* Read the entire parent register */
343 
344     Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
345         &RegisterValue);
346     if (ACPI_FAILURE (Status))
347     {
348         return_ACPI_STATUS (Status);
349     }
350 
351     /* Normalize the value that was read, mask off other bits */
352 
353     Value = ((RegisterValue & BitRegInfo->AccessBitMask)
354         >> BitRegInfo->BitPosition);
355 
356     ACPI_DEBUG_PRINT ((ACPI_DB_IO,
357         "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n",
358         RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value));
359 
360     *ReturnValue = Value;
361     return_ACPI_STATUS (AE_OK);
362 }
363 
ACPI_EXPORT_SYMBOL(AcpiReadBitRegister)364 ACPI_EXPORT_SYMBOL (AcpiReadBitRegister)
365 
366 
367 /*******************************************************************************
368  *
369  * FUNCTION:    AcpiWriteBitRegister
370  *
371  * PARAMETERS:  RegisterId      - ID of ACPI Bit Register to access
372  *              Value           - Value to write to the register, in bit
373  *                                position zero. The bit is automatically
374  *                                shifted to the correct position.
375  *
376  * RETURN:      Status
377  *
378  * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock
379  *              since most operations require a read/modify/write sequence.
380  *
381  * SUPPORTS:    Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
382  *              PM2 Control.
383  *
384  * Note that at this level, the fact that there may be actually two
385  * hardware registers (A and B - and B may not exist) is abstracted.
386  *
387  ******************************************************************************/
388 
389 ACPI_STATUS
390 AcpiWriteBitRegister (
391     UINT32                  RegisterId,
392     UINT32                  Value)
393 {
394     ACPI_BIT_REGISTER_INFO  *BitRegInfo;
395     ACPI_CPU_FLAGS          LockFlags;
396     UINT32                  RegisterValue;
397     ACPI_STATUS             Status = AE_OK;
398 
399 
400     ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId);
401 
402 
403     /* Get the info structure corresponding to the requested ACPI Register */
404 
405     BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
406     if (!BitRegInfo)
407     {
408         return_ACPI_STATUS (AE_BAD_PARAMETER);
409     }
410 
411     LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
412 
413     /*
414      * At this point, we know that the parent register is one of the
415      * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control
416      */
417     if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS)
418     {
419         /*
420          * 1) Case for PM1 Enable, PM1 Control, and PM2 Control
421          *
422          * Perform a register read to preserve the bits that we are not
423          * interested in
424          */
425         Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
426             &RegisterValue);
427         if (ACPI_FAILURE (Status))
428         {
429             goto UnlockAndExit;
430         }
431 
432         /*
433          * Insert the input bit into the value that was just read
434          * and write the register
435          */
436         ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
437             BitRegInfo->AccessBitMask, Value);
438 
439         Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister,
440             RegisterValue);
441     }
442     else
443     {
444         /*
445          * 2) Case for PM1 Status
446          *
447          * The Status register is different from the rest. Clear an event
448          * by writing 1, writing 0 has no effect. So, the only relevant
449          * information is the single bit we're interested in, all others
450          * should be written as 0 so they will be left unchanged.
451          */
452         RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value,
453             BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
454 
455         /* No need to write the register if value is all zeros */
456 
457         if (RegisterValue)
458         {
459             Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS,
460                 RegisterValue);
461         }
462     }
463 
464     ACPI_DEBUG_PRINT ((ACPI_DB_IO,
465         "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n",
466         RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue));
467 
468 
469 UnlockAndExit:
470 
471     AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
472     return_ACPI_STATUS (Status);
473 }
474 
ACPI_EXPORT_SYMBOL(AcpiWriteBitRegister)475 ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister)
476 
477 #endif /* !ACPI_REDUCED_HARDWARE */
478 
479 
480 /*******************************************************************************
481  *
482  * FUNCTION:    AcpiGetSleepTypeData
483  *
484  * PARAMETERS:  SleepState          - Numeric sleep state
485  *              *SleepTypeA         - Where SLP_TYPa is returned
486  *              *SleepTypeB         - Where SLP_TYPb is returned
487  *
488  * RETURN:      Status
489  *
490  * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested
491  *              sleep state via the appropriate \_Sx object.
492  *
493  *  The sleep state package returned from the corresponding \_Sx_ object
494  *  must contain at least one integer.
495  *
496  *  March 2005:
497  *  Added support for a package that contains two integers. This
498  *  goes against the ACPI specification which defines this object as a
499  *  package with one encoded DWORD integer. However, existing practice
500  *  by many BIOS vendors is to return a package with 2 or more integer
501  *  elements, at least one per sleep type (A/B).
502  *
503  *  January 2013:
504  *  Therefore, we must be prepared to accept a package with either a
505  *  single integer or multiple integers.
506  *
507  *  The single integer DWORD format is as follows:
508  *      BYTE 0 - Value for the PM1A SLP_TYP register
509  *      BYTE 1 - Value for the PM1B SLP_TYP register
510  *      BYTE 2-3 - Reserved
511  *
512  *  The dual integer format is as follows:
513  *      Integer 0 - Value for the PM1A SLP_TYP register
514  *      Integer 1 - Value for the PM1A SLP_TYP register
515  *
516  ******************************************************************************/
517 
518 ACPI_STATUS
519 AcpiGetSleepTypeData (
520     UINT8                   SleepState,
521     UINT8                   *SleepTypeA,
522     UINT8                   *SleepTypeB)
523 {
524     ACPI_STATUS             Status;
525     ACPI_EVALUATE_INFO      *Info;
526     ACPI_OPERAND_OBJECT     **Elements;
527 
528 
529     ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData);
530 
531 
532     /* Validate parameters */
533 
534     if ((SleepState > ACPI_S_STATES_MAX) ||
535         !SleepTypeA || !SleepTypeB)
536     {
537         return_ACPI_STATUS (AE_BAD_PARAMETER);
538     }
539 
540     /* Allocate the evaluation information block */
541 
542     Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
543     if (!Info)
544     {
545         return_ACPI_STATUS (AE_NO_MEMORY);
546     }
547 
548     /*
549      * Evaluate the \_Sx namespace object containing the register values
550      * for this state
551      */
552     Info->RelativePathname = AcpiGbl_SleepStateNames[SleepState];
553 
554     Status = AcpiNsEvaluate (Info);
555     if (ACPI_FAILURE (Status))
556     {
557         if (Status == AE_NOT_FOUND)
558         {
559             /* The _Sx states are optional, ignore NOT_FOUND */
560 
561             goto FinalCleanup;
562         }
563 
564         goto WarningCleanup;
565     }
566 
567     /* Must have a return object */
568 
569     if (!Info->ReturnObject)
570     {
571         ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
572             Info->RelativePathname));
573         Status = AE_AML_NO_RETURN_VALUE;
574         goto WarningCleanup;
575     }
576 
577     /* Return object must be of type Package */
578 
579     if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
580     {
581         ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package"));
582         Status = AE_AML_OPERAND_TYPE;
583         goto ReturnValueCleanup;
584     }
585 
586     /*
587      * Any warnings about the package length or the object types have
588      * already been issued by the predefined name module -- there is no
589      * need to repeat them here.
590      */
591     Elements = Info->ReturnObject->Package.Elements;
592     switch (Info->ReturnObject->Package.Count)
593     {
594     case 0:
595 
596         Status = AE_AML_PACKAGE_LIMIT;
597         break;
598 
599     case 1:
600 
601         if (Elements[0]->Common.Type != ACPI_TYPE_INTEGER)
602         {
603             Status = AE_AML_OPERAND_TYPE;
604             break;
605         }
606 
607         /* A valid _Sx_ package with one integer */
608 
609         *SleepTypeA = (UINT8) Elements[0]->Integer.Value;
610         *SleepTypeB = (UINT8) (Elements[0]->Integer.Value >> 8);
611         break;
612 
613     case 2:
614     default:
615 
616         if ((Elements[0]->Common.Type != ACPI_TYPE_INTEGER) ||
617             (Elements[1]->Common.Type != ACPI_TYPE_INTEGER))
618         {
619             Status = AE_AML_OPERAND_TYPE;
620             break;
621         }
622 
623         /* A valid _Sx_ package with two integers */
624 
625         *SleepTypeA = (UINT8) Elements[0]->Integer.Value;
626         *SleepTypeB = (UINT8) Elements[1]->Integer.Value;
627         break;
628     }
629 
630 ReturnValueCleanup:
631     AcpiUtRemoveReference (Info->ReturnObject);
632 
633 WarningCleanup:
634     if (ACPI_FAILURE (Status))
635     {
636         ACPI_EXCEPTION ((AE_INFO, Status,
637             "While evaluating Sleep State [%s]",
638             Info->RelativePathname));
639     }
640 
641 FinalCleanup:
642     ACPI_FREE (Info);
643     return_ACPI_STATUS (Status);
644 }
645 
646 ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)
647