1 /******************************************************************************
3 * Module Name: aslpredef - support for ACPI predefined names
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************/
116 #define ACPI_CREATE_PREDEFINED_TABLE
118 #include <contrib/dev/acpica/compiler/aslcompiler.h>
119 #include "aslcompiler.y.h"
120 #include <contrib/dev/acpica/include/acpredef.h>
123 #define _COMPONENT ACPI_COMPILER
124 ACPI_MODULE_NAME ("aslpredef")
127 /* Local prototypes */
130 ApCheckForSpecialName (
131 ACPI_PARSE_OBJECT *Op,
136 ACPI_PARSE_OBJECT *Op,
137 UINT32 ExpectedBtypes);
142 UINT32 ExpectedBtypes);
146 * Names for the types that can be returned by the predefined objects.
147 * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
149 static const char *AcpiRtypeNames[] =
159 * Predefined names for use in Resource Descriptors. These names do not
160 * appear in the global Predefined Name table (since these names never
161 * appear in actual AML byte code, only in the original ASL)
163 static const ACPI_PREDEFINED_INFO ResourceNames[] = {
185 {{"_RT_", 0, 0}}, /* Acpi 3.0 */
191 {{"_TSF", 0, 0}}, /* Acpi 3.0 */
194 {{{0,0,0,0}, 0, 0}} /* Table terminator */
197 static const ACPI_PREDEFINED_INFO ScopeNames[] = {
201 {{{0,0,0,0}, 0, 0}} /* Table terminator */
205 /*******************************************************************************
207 * FUNCTION: ApCheckForPredefinedMethod
209 * PARAMETERS: Op - A parse node of type "METHOD".
210 * MethodInfo - Saved info about this method
214 * DESCRIPTION: If method is a predefined name, check that the number of
215 * arguments and the return type (returns a value or not)
218 ******************************************************************************/
221 ApCheckForPredefinedMethod (
222 ACPI_PARSE_OBJECT *Op,
223 ASL_METHOD_INFO *MethodInfo)
226 UINT32 RequiredArgsCurrent;
227 UINT32 RequiredArgsOld;
230 /* Check for a match against the predefined name list */
232 Index = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
236 case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
237 case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
238 case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
240 /* Just return, nothing to do */
244 case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
246 Gbl_ReservedMethods++;
248 /* NumArguments must be zero for all _Lxx/_Exx/_Wxx/_Qxx methods */
250 if (MethodInfo->NumArguments != 0)
252 sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 0);
254 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
262 * Matched a predefined method name
264 * Validate the ASL-defined argument count. Allow two different legal
267 Gbl_ReservedMethods++;
269 RequiredArgsCurrent = PredefinedNames[Index].Info.ParamCount & 0x0F;
270 RequiredArgsOld = PredefinedNames[Index].Info.ParamCount >> 4;
272 if ((MethodInfo->NumArguments != RequiredArgsCurrent) &&
273 (MethodInfo->NumArguments != RequiredArgsOld))
275 sprintf (MsgBuffer, "%4.4s requires %u",
276 PredefinedNames[Index].Info.Name, RequiredArgsCurrent);
278 if (MethodInfo->NumArguments > RequiredArgsCurrent)
280 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
285 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_LO, Op,
291 * Check if method returns no value, but the predefined name is
292 * required to return a value
294 if (MethodInfo->NumReturnNoValue &&
295 PredefinedNames[Index].Info.ExpectedBtypes)
297 ApGetExpectedTypes (StringBuffer,
298 PredefinedNames[Index].Info.ExpectedBtypes);
300 sprintf (MsgBuffer, "%s required for %4.4s",
301 StringBuffer, PredefinedNames[Index].Info.Name);
303 AslError (ASL_WARNING, ASL_MSG_RESERVED_RETURN_VALUE, Op,
311 /*******************************************************************************
313 * FUNCTION: ApCheckPredefinedReturnValue
315 * PARAMETERS: Op - A parse node of type "RETURN".
316 * MethodInfo - Saved info about this method
320 * DESCRIPTION: If method is a predefined name, attempt to validate the return
321 * value. Only "static" types can be validated - a simple return
322 * of an integer/string/buffer/package or a named reference to
323 * a static object. Values such as a Localx or Argx or a control
324 * method invocation are not checked.
326 ******************************************************************************/
329 ApCheckPredefinedReturnValue (
330 ACPI_PARSE_OBJECT *Op,
331 ASL_METHOD_INFO *MethodInfo)
334 ACPI_PARSE_OBJECT *ReturnValueOp;
337 /* Check parent method for a match against the predefined name list */
339 Index = ApCheckForPredefinedName (MethodInfo->Op,
340 MethodInfo->Op->Asl.NameSeg);
344 case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
345 case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
346 case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
347 case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
349 /* Just return, nothing to do */
352 default: /* A standard predefined ACPI name */
354 /* Exit if no return value expected */
356 if (!PredefinedNames[Index].Info.ExpectedBtypes)
361 /* Get the object returned, it is the next argument */
363 ReturnValueOp = Op->Asl.Child;
364 switch (ReturnValueOp->Asl.ParseOpcode)
369 case PARSEOP_INTEGER:
370 case PARSEOP_STRING_LITERAL:
372 case PARSEOP_PACKAGE:
374 /* Static data return object - check against expected type */
376 ApCheckObjectType (ReturnValueOp,
377 PredefinedNames[Index].Info.ExpectedBtypes);
383 * All other ops are very difficult or impossible to typecheck at
384 * compile time. These include all Localx, Argx, and method
385 * invocations. Also, NAMESEG and NAMESTRING because the type of
386 * any named object can be changed at runtime (for example,
387 * CopyObject will change the type of the target object.)
395 /*******************************************************************************
397 * FUNCTION: ApCheckForPredefinedObject
399 * PARAMETERS: Op - A parse node
400 * Name - The ACPI name to be checked
404 * DESCRIPTION: Check for a predefined name for a static object (created via
405 * the ASL Name operator). If it is a predefined ACPI name, ensure
406 * that the name does not require any arguments (which would
407 * require a control method implemenation of the name), and that
408 * the type of the object is one of the expected types for the
411 ******************************************************************************/
414 ApCheckForPredefinedObject (
415 ACPI_PARSE_OBJECT *Op,
422 * Check for a real predefined name -- not a resource descriptor name
423 * or a predefined scope name
425 Index = ApCheckForPredefinedName (Op, Name);
429 case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
430 case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
431 case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
436 case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
439 * These names must be control methods, by definition in ACPI spec.
440 * Also because they are defined to return no value. None of them
441 * require any arguments.
443 AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
444 "with zero arguments");
447 default: /* A standard predefined ACPI name */
450 * If this predefined name requires input arguments, then
451 * it must be implemented as a control method
453 if (PredefinedNames[Index].Info.ParamCount > 0)
455 AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
461 * If no return value is expected from this predefined name, then
462 * it follows that it must be implemented as a control method
463 * (with zero args, because the args > 0 case was handled above)
464 * Examples are: _DIS, _INI, _IRC, _OFF, _ON, _PSx
466 if (!PredefinedNames[Index].Info.ExpectedBtypes)
468 AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
469 "with zero arguments");
473 /* Typecheck the actual object, it is the next argument */
475 ApCheckObjectType (Op->Asl.Child->Asl.Next,
476 PredefinedNames[Index].Info.ExpectedBtypes);
482 /*******************************************************************************
484 * FUNCTION: ApCheckForPredefinedName
486 * PARAMETERS: Op - A parse node
487 * Name - NameSeg to check
491 * DESCRIPTION: Check a NameSeg against the reserved list.
493 ******************************************************************************/
496 ApCheckForPredefinedName (
497 ACPI_PARSE_OBJECT *Op,
505 AcpiOsPrintf ("Found a null name, external = %s\n",
506 Op->Asl.ExternalName);
509 /* All reserved names are prefixed with a single underscore */
513 return (ACPI_NOT_RESERVED_NAME);
516 /* Check for a standard predefined method name */
518 for (i = 0; PredefinedNames[i].Info.Name[0]; i++)
520 if (ACPI_COMPARE_NAME (Name, PredefinedNames[i].Info.Name))
522 /* Return index into predefined array */
527 /* Check for resource names and predefined scope names */
529 for (i = 0; ResourceNames[i].Info.Name[0]; i++)
531 if (ACPI_COMPARE_NAME (Name, ResourceNames[i].Info.Name))
533 return (ACPI_PREDEFINED_NAME);
537 for (i = 0; ScopeNames[i].Info.Name[0]; i++)
539 if (ACPI_COMPARE_NAME (Name, ScopeNames[i].Info.Name))
541 return (ACPI_PREDEFINED_NAME);
545 /* Check for _Lxx/_Exx/_Wxx/_Qxx/_T_x. Warning if unknown predefined name */
547 return (ApCheckForSpecialName (Op, Name));
551 /*******************************************************************************
553 * FUNCTION: ApCheckForSpecialName
555 * PARAMETERS: Op - A parse node
556 * Name - NameSeg to check
560 * DESCRIPTION: Check for the "special" predefined names -
561 * _Lxx, _Exx, _Qxx, _Wxx, and _T_x
563 ******************************************************************************/
566 ApCheckForSpecialName (
567 ACPI_PARSE_OBJECT *Op,
572 * Check for the "special" predefined names. We already know that the
573 * first character is an underscore.
579 if ((Name[1] == 'L') ||
584 /* The next two characters must be hex digits */
586 if ((isxdigit ((int) Name[2])) &&
587 (isxdigit ((int) Name[3])))
589 return (ACPI_EVENT_RESERVED_NAME);
593 /* Check for the names reserved for the compiler itself: _T_x */
595 else if ((Op->Asl.ExternalName[1] == 'T') &&
596 (Op->Asl.ExternalName[2] == '_'))
598 /* Ignore if actually emitted by the compiler */
600 if (Op->Asl.CompileFlags & NODE_COMPILER_EMITTED)
602 return (ACPI_NOT_RESERVED_NAME);
606 * Was not actually emitted by the compiler. This is a special case,
607 * however. If the ASL code being compiled was the result of a
608 * dissasembly, it may possibly contain valid compiler-emitted names
609 * of the form "_T_x". We don't want to issue an error or even a
610 * warning and force the user to manually change the names. So, we
611 * will issue a remark instead.
613 AslError (ASL_REMARK, ASL_MSG_COMPILER_RESERVED, Op, Op->Asl.ExternalName);
614 return (ACPI_COMPILER_RESERVED_NAME);
618 * The name didn't match any of the known predefined names. Flag it as a
619 * warning, since the entire namespace starting with an underscore is
620 * reserved by the ACPI spec.
622 AslError (ASL_WARNING, ASL_MSG_UNKNOWN_RESERVED_NAME, Op,
623 Op->Asl.ExternalName);
625 return (ACPI_NOT_RESERVED_NAME);
629 /*******************************************************************************
631 * FUNCTION: ApCheckObjectType
633 * PARAMETERS: Op - Current parse node
634 * ExpectedBtypes - Bitmap of expected return type(s)
638 * DESCRIPTION: Check if the object type is one of the types that is expected
639 * by the predefined name. Only a limited number of object types
640 * can be returned by the predefined names.
642 ******************************************************************************/
646 ACPI_PARSE_OBJECT *Op,
647 UINT32 ExpectedBtypes)
652 switch (Op->Asl.ParseOpcode)
657 case PARSEOP_INTEGER:
658 ReturnBtype = ACPI_RTYPE_INTEGER;
662 ReturnBtype = ACPI_RTYPE_BUFFER;
665 case PARSEOP_STRING_LITERAL:
666 ReturnBtype = ACPI_RTYPE_STRING;
669 case PARSEOP_PACKAGE:
670 ReturnBtype = ACPI_RTYPE_PACKAGE;
674 /* Not one of the supported object types */
679 /* Exit if the object is one of the expected types */
681 if (ReturnBtype & ExpectedBtypes)
689 /* Format the expected types and emit an error message */
691 ApGetExpectedTypes (StringBuffer, ExpectedBtypes);
693 sprintf (MsgBuffer, "found %s, requires %s",
694 UtGetOpName (Op->Asl.ParseOpcode), StringBuffer);
696 AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op,
701 /*******************************************************************************
703 * FUNCTION: ApDisplayReservedNames
709 * DESCRIPTION: Dump information about the ACPI predefined names and predefined
710 * resource descriptor names.
712 ******************************************************************************/
715 ApDisplayReservedNames (
718 const ACPI_PREDEFINED_INFO *ThisName;
719 char TypeBuffer[48]; /* Room for 5 types */
724 * Predefined names/methods
726 printf ("\nPredefined Name Information\n\n");
729 ThisName = PredefinedNames;
730 while (ThisName->Info.Name[0])
732 printf ("%4.4s Requires %u arguments, ",
733 ThisName->Info.Name, ThisName->Info.ParamCount & 0x0F);
735 if (ThisName->Info.ExpectedBtypes)
737 ApGetExpectedTypes (TypeBuffer, ThisName->Info.ExpectedBtypes);
738 printf ("Must return: %s\n", TypeBuffer);
742 printf ("No return value\n");
746 * Skip next entry in the table if this name returns a Package
747 * (next entry contains the package info)
749 if (ThisName->Info.ExpectedBtypes & ACPI_RTYPE_PACKAGE)
758 printf ("%u Predefined Names are recognized\n", Count);
761 * Resource Descriptor names
763 printf ("\nResource Descriptor Predefined Names\n\n");
766 ThisName = ResourceNames;
767 while (ThisName->Info.Name[0])
769 printf ("%4.4s Resource Descriptor\n", ThisName->Info.Name);
774 printf ("%u Resource Descriptor Names are recognized\n", Count);
777 * Predefined scope names
779 printf ("\nPredefined Scope Names\n\n");
781 ThisName = ScopeNames;
782 while (ThisName->Info.Name[0])
784 printf ("%4.4s Scope\n", ThisName->Info.Name);
790 /*******************************************************************************
792 * FUNCTION: ApGetExpectedTypes
794 * PARAMETERS: Buffer - Where the formatted string is returned
795 * ExpectedBTypes - Bitfield of expected data types
797 * RETURN: None, formatted string
799 * DESCRIPTION: Format the expected object types into a printable string.
801 ******************************************************************************/
806 UINT32 ExpectedBtypes)
815 ThisRtype = ACPI_RTYPE_INTEGER;
817 for (i = 0; i < ACPI_NUM_RTYPES; i++)
819 /* If one of the expected types, concatenate the name of this type */
821 if (ExpectedBtypes & ThisRtype)
823 ACPI_STRCAT (Buffer, &AcpiRtypeNames[i][j]);
824 j = 0; /* Use name separator from now on */
826 ThisRtype <<= 1; /* Next Rtype */