1 /******************************************************************************
3 * Module Name: nsconvert - Object conversions for objects returned by
6 *****************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2015, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
118 #include "accommon.h"
119 #include "acnamesp.h"
120 #include "acinterp.h"
121 #include "acpredef.h"
122 #include "amlresrc.h"
124 #define _COMPONENT ACPI_NAMESPACE
125 ACPI_MODULE_NAME ("nsconvert")
128 /*******************************************************************************
130 * FUNCTION: AcpiNsConvertToInteger
132 * PARAMETERS: OriginalObject - Object to be converted
133 * ReturnObject - Where the new converted object is returned
135 * RETURN: Status. AE_OK if conversion was successful.
137 * DESCRIPTION: Attempt to convert a String/Buffer object to an Integer.
139 ******************************************************************************/
142 AcpiNsConvertToInteger (
143 ACPI_OPERAND_OBJECT *OriginalObject,
144 ACPI_OPERAND_OBJECT **ReturnObject)
146 ACPI_OPERAND_OBJECT *NewObject;
152 switch (OriginalObject->Common.Type)
154 case ACPI_TYPE_STRING:
156 /* String-to-Integer conversion */
158 Status = AcpiUtStrtoul64 (OriginalObject->String.Pointer,
159 ACPI_ANY_BASE, &Value);
160 if (ACPI_FAILURE (Status))
166 case ACPI_TYPE_BUFFER:
168 /* Buffer-to-Integer conversion. Max buffer size is 64 bits. */
170 if (OriginalObject->Buffer.Length > 8)
172 return (AE_AML_OPERAND_TYPE);
175 /* Extract each buffer byte to create the integer */
177 for (i = 0; i < OriginalObject->Buffer.Length; i++)
179 Value |= ((UINT64) OriginalObject->Buffer.Pointer[i] << (i * 8));
185 return (AE_AML_OPERAND_TYPE);
188 NewObject = AcpiUtCreateIntegerObject (Value);
191 return (AE_NO_MEMORY);
194 *ReturnObject = NewObject;
199 /*******************************************************************************
201 * FUNCTION: AcpiNsConvertToString
203 * PARAMETERS: OriginalObject - Object to be converted
204 * ReturnObject - Where the new converted object is returned
206 * RETURN: Status. AE_OK if conversion was successful.
208 * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String.
210 ******************************************************************************/
213 AcpiNsConvertToString (
214 ACPI_OPERAND_OBJECT *OriginalObject,
215 ACPI_OPERAND_OBJECT **ReturnObject)
217 ACPI_OPERAND_OBJECT *NewObject;
222 switch (OriginalObject->Common.Type)
224 case ACPI_TYPE_INTEGER:
226 * Integer-to-String conversion. Commonly, convert
227 * an integer of value 0 to a NULL string. The last element of
228 * _BIF and _BIX packages occasionally need this fix.
230 if (OriginalObject->Integer.Value == 0)
232 /* Allocate a new NULL string object */
234 NewObject = AcpiUtCreateStringObject (0);
237 return (AE_NO_MEMORY);
242 Status = AcpiExConvertToString (OriginalObject, &NewObject,
243 ACPI_IMPLICIT_CONVERT_HEX);
244 if (ACPI_FAILURE (Status))
251 case ACPI_TYPE_BUFFER:
253 * Buffer-to-String conversion. Use a ToString
254 * conversion, no transform performed on the buffer data. The best
255 * example of this is the _BIF method, where the string data from
256 * the battery is often (incorrectly) returned as buffer object(s).
259 while ((Length < OriginalObject->Buffer.Length) &&
260 (OriginalObject->Buffer.Pointer[Length]))
265 /* Allocate a new string object */
267 NewObject = AcpiUtCreateStringObject (Length);
270 return (AE_NO_MEMORY);
274 * Copy the raw buffer data with no transform. String is already NULL
275 * terminated at Length+1.
277 ACPI_MEMCPY (NewObject->String.Pointer,
278 OriginalObject->Buffer.Pointer, Length);
283 return (AE_AML_OPERAND_TYPE);
286 *ReturnObject = NewObject;
291 /*******************************************************************************
293 * FUNCTION: AcpiNsConvertToBuffer
295 * PARAMETERS: OriginalObject - Object to be converted
296 * ReturnObject - Where the new converted object is returned
298 * RETURN: Status. AE_OK if conversion was successful.
300 * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer.
302 ******************************************************************************/
305 AcpiNsConvertToBuffer (
306 ACPI_OPERAND_OBJECT *OriginalObject,
307 ACPI_OPERAND_OBJECT **ReturnObject)
309 ACPI_OPERAND_OBJECT *NewObject;
311 ACPI_OPERAND_OBJECT **Elements;
317 switch (OriginalObject->Common.Type)
319 case ACPI_TYPE_INTEGER:
321 * Integer-to-Buffer conversion.
322 * Convert the Integer to a packed-byte buffer. _MAT and other
323 * objects need this sometimes, if a read has been performed on a
324 * Field object that is less than or equal to the global integer
325 * size (32 or 64 bits).
327 Status = AcpiExConvertToBuffer (OriginalObject, &NewObject);
328 if (ACPI_FAILURE (Status))
334 case ACPI_TYPE_STRING:
336 /* String-to-Buffer conversion. Simple data copy */
338 NewObject = AcpiUtCreateBufferObject (OriginalObject->String.Length);
341 return (AE_NO_MEMORY);
344 ACPI_MEMCPY (NewObject->Buffer.Pointer,
345 OriginalObject->String.Pointer, OriginalObject->String.Length);
348 case ACPI_TYPE_PACKAGE:
350 * This case is often seen for predefined names that must return a
351 * Buffer object with multiple DWORD integers within. For example,
352 * _FDE and _GTM. The Package can be converted to a Buffer.
355 /* All elements of the Package must be integers */
357 Elements = OriginalObject->Package.Elements;
358 Count = OriginalObject->Package.Count;
360 for (i = 0; i < Count; i++)
363 ((*Elements)->Common.Type != ACPI_TYPE_INTEGER))
365 return (AE_AML_OPERAND_TYPE);
370 /* Create the new buffer object to replace the Package */
372 NewObject = AcpiUtCreateBufferObject (ACPI_MUL_4 (Count));
375 return (AE_NO_MEMORY);
378 /* Copy the package elements (integers) to the buffer as DWORDs */
380 Elements = OriginalObject->Package.Elements;
381 DwordBuffer = ACPI_CAST_PTR (UINT32, NewObject->Buffer.Pointer);
383 for (i = 0; i < Count; i++)
385 *DwordBuffer = (UINT32) (*Elements)->Integer.Value;
393 return (AE_AML_OPERAND_TYPE);
396 *ReturnObject = NewObject;
401 /*******************************************************************************
403 * FUNCTION: AcpiNsConvertToUnicode
405 * PARAMETERS: OriginalObject - ASCII String Object to be converted
406 * ReturnObject - Where the new converted object is returned
408 * RETURN: Status. AE_OK if conversion was successful.
410 * DESCRIPTION: Attempt to convert a String object to a Unicode string Buffer.
412 ******************************************************************************/
415 AcpiNsConvertToUnicode (
416 ACPI_OPERAND_OBJECT *OriginalObject,
417 ACPI_OPERAND_OBJECT **ReturnObject)
419 ACPI_OPERAND_OBJECT *NewObject;
421 UINT16 *UnicodeBuffer;
422 UINT32 UnicodeLength;
431 /* If a Buffer was returned, it must be at least two bytes long */
433 if (OriginalObject->Common.Type == ACPI_TYPE_BUFFER)
435 if (OriginalObject->Buffer.Length < 2)
437 return (AE_AML_OPERAND_VALUE);
440 *ReturnObject = NULL;
445 * The original object is an ASCII string. Convert this string to
448 AsciiString = OriginalObject->String.Pointer;
449 UnicodeLength = (OriginalObject->String.Length * 2) + 2;
451 /* Create a new buffer object for the Unicode data */
453 NewObject = AcpiUtCreateBufferObject (UnicodeLength);
456 return (AE_NO_MEMORY);
459 UnicodeBuffer = ACPI_CAST_PTR (UINT16, NewObject->Buffer.Pointer);
461 /* Convert ASCII to Unicode */
463 for (i = 0; i < OriginalObject->String.Length; i++)
465 UnicodeBuffer[i] = (UINT16) AsciiString[i];
468 *ReturnObject = NewObject;
473 /*******************************************************************************
475 * FUNCTION: AcpiNsConvertToResource
477 * PARAMETERS: OriginalObject - Object to be converted
478 * ReturnObject - Where the new converted object is returned
480 * RETURN: Status. AE_OK if conversion was successful
482 * DESCRIPTION: Attempt to convert a Integer object to a ResourceTemplate
485 ******************************************************************************/
488 AcpiNsConvertToResource (
489 ACPI_OPERAND_OBJECT *OriginalObject,
490 ACPI_OPERAND_OBJECT **ReturnObject)
492 ACPI_OPERAND_OBJECT *NewObject;
497 * We can fix the following cases for an expected resource template:
498 * 1. No return value (interpreter slack mode is disabled)
499 * 2. A "Return (Zero)" statement
500 * 3. A "Return empty buffer" statement
502 * We will return a buffer containing a single EndTag
503 * resource descriptor.
507 switch (OriginalObject->Common.Type)
509 case ACPI_TYPE_INTEGER:
511 /* We can only repair an Integer==0 */
513 if (OriginalObject->Integer.Value)
515 return (AE_AML_OPERAND_TYPE);
519 case ACPI_TYPE_BUFFER:
521 if (OriginalObject->Buffer.Length)
523 /* Additional checks can be added in the future */
525 *ReturnObject = NULL;
530 case ACPI_TYPE_STRING:
533 return (AE_AML_OPERAND_TYPE);
537 /* Create the new buffer object for the resource descriptor */
539 NewObject = AcpiUtCreateBufferObject (2);
542 return (AE_NO_MEMORY);
545 Buffer = ACPI_CAST_PTR (UINT8, NewObject->Buffer.Pointer);
547 /* Initialize the Buffer with a single EndTag descriptor */
549 Buffer[0] = (ACPI_RESOURCE_NAME_END_TAG | ASL_RDESC_END_TAG_SIZE);
552 *ReturnObject = NewObject;