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  1. /******************************************************************************
  2.  *
  3.  * Module Name: aslpredef - support for ACPI predefined names
  4.  *
  5.  *****************************************************************************/
  6.  
  7. /******************************************************************************
  8.  *
  9.  * 1. Copyright Notice
  10.  *
  11.  * Some or all of this work - Copyright (c) 1999 - 2010, 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. #define ACPI_CREATE_PREDEFINED_TABLE
  117.  
  118. #include "aslcompiler.h"
  119. #include "aslcompiler.y.h"
  120. #include "amlcode.h"
  121. #include "acparser.h"
  122. #include "acpredef.h"
  123.  
  124.  
  125. #define _COMPONENT          ACPI_COMPILER
  126.         ACPI_MODULE_NAME    ("aslpredef")
  127.  
  128.  
  129. /* Local prototypes */
  130.  
  131. static UINT32
  132. ApCheckForSpecialName (
  133.     ACPI_PARSE_OBJECT       *Op,
  134.     char                    *Name);
  135.  
  136. static void
  137. ApCheckObjectType (
  138.     ACPI_PARSE_OBJECT       *Op,
  139.     UINT32                  ExpectedBtypes);
  140.  
  141. static void
  142. ApGetExpectedTypes (
  143.     char                    *Buffer,
  144.     UINT32                  ExpectedBtypes);
  145.  
  146.  
  147. /*
  148.  * Names for the types that can be returned by the predefined objects.
  149.  * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
  150.  */
  151. static const char   *AcpiRtypeNames[] =
  152. {
  153.     "/Integer",
  154.     "/String",
  155.     "/Buffer",
  156.     "/Package",
  157.     "/Reference",
  158. };
  159.  
  160. /*
  161.  * Predefined names for use in Resource Descriptors. These names do not
  162.  * appear in the global Predefined Name table (since these names never
  163.  * appear in actual AML byte code, only in the original ASL)
  164.  */
  165. static const ACPI_PREDEFINED_INFO      ResourceNames[] = {
  166.     {{"_ALN",     0,      0}},
  167.     {{"_ASI",     0,      0}},
  168.     {{"_ASZ",     0,      0}},
  169.     {{"_ATT",     0,      0}},
  170.     {{"_BAS",     0,      0}},
  171.     {{"_BM_",     0,      0}},
  172.     {{"_DEC",     0,      0}},
  173.     {{"_GRA",     0,      0}},
  174.     {{"_HE_",     0,      0}},
  175.     {{"_INT",     0,      0}},
  176.     {{"_LEN",     0,      0}},
  177.     {{"_LL_",     0,      0}},
  178.     {{"_MAF",     0,      0}},
  179.     {{"_MAX",     0,      0}},
  180.     {{"_MEM",     0,      0}},
  181.     {{"_MIF",     0,      0}},
  182.     {{"_MIN",     0,      0}},
  183.     {{"_MTP",     0,      0}},
  184.     {{"_RBO",     0,      0}},
  185.     {{"_RBW",     0,      0}},
  186.     {{"_RNG",     0,      0}},
  187.     {{"_RT_",     0,      0}},  /* Acpi 3.0 */
  188.     {{"_RW_",     0,      0}},
  189.     {{"_SHR",     0,      0}},
  190.     {{"_SIZ",     0,      0}},
  191.     {{"_TRA",     0,      0}},
  192.     {{"_TRS",     0,      0}},
  193.     {{"_TSF",     0,      0}},  /* Acpi 3.0 */
  194.     {{"_TTP",     0,      0}},
  195.     {{"_TYP",     0,      0}},
  196.     {{{0,0,0,0},  0,      0}}   /* Table terminator */
  197. };
  198.  
  199. static const ACPI_PREDEFINED_INFO      ScopeNames[] = {
  200.     {{"_SB_",     0,      0}},
  201.     {{"_SI_",     0,      0}},
  202.     {{"_TZ_",     0,      0}},
  203.     {{{0,0,0,0},  0,      0}}   /* Table terminator */
  204. };
  205.  
  206.  
  207. /*******************************************************************************
  208.  *
  209.  * FUNCTION:    ApCheckForPredefinedMethod
  210.  *
  211.  * PARAMETERS:  Op              - A parse node of type "METHOD".
  212.  *              MethodInfo      - Saved info about this method
  213.  *
  214.  * RETURN:      None
  215.  *
  216.  * DESCRIPTION: If method is a predefined name, check that the number of
  217.  *              arguments and the return type (returns a value or not)
  218.  *              is correct.
  219.  *
  220.  ******************************************************************************/
  221.  
  222. void
  223. ApCheckForPredefinedMethod (
  224.     ACPI_PARSE_OBJECT       *Op,
  225.     ASL_METHOD_INFO         *MethodInfo)
  226. {
  227.     UINT32                  Index;
  228.     UINT32                  RequiredArgsCurrent;
  229.     UINT32                  RequiredArgsOld;
  230.  
  231.  
  232.     /* Check for a match against the predefined name list */
  233.  
  234.     Index = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
  235.  
  236.     switch (Index)
  237.     {
  238.     case ACPI_NOT_RESERVED_NAME:        /* No underscore or _Txx or _xxx name not matched */
  239.     case ACPI_PREDEFINED_NAME:          /* Resource Name or reserved scope name */
  240.     case ACPI_COMPILER_RESERVED_NAME:   /* A _Txx that was not emitted by compiler */
  241.  
  242.         /* Just return, nothing to do */
  243.         break;
  244.  
  245.  
  246.     case ACPI_EVENT_RESERVED_NAME:      /* _Lxx/_Exx/_Wxx/_Qxx methods */
  247.  
  248.         Gbl_ReservedMethods++;
  249.  
  250.         /* NumArguments must be zero for all _Lxx/_Exx/_Wxx/_Qxx methods */
  251.  
  252.         if (MethodInfo->NumArguments != 0)
  253.         {
  254.             sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 0);
  255.  
  256.             AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
  257.                 MsgBuffer);
  258.         }
  259.         break;
  260.  
  261.  
  262.     default:
  263.         /*
  264.          * Matched a predefined method name
  265.          *
  266.          * Validate the ASL-defined argument count. Allow two different legal
  267.          * arg counts.
  268.          */
  269.         Gbl_ReservedMethods++;
  270.  
  271.         RequiredArgsCurrent = PredefinedNames[Index].Info.ParamCount & 0x0F;
  272.         RequiredArgsOld = PredefinedNames[Index].Info.ParamCount >> 4;
  273.  
  274.         if ((MethodInfo->NumArguments != RequiredArgsCurrent) &&
  275.             (MethodInfo->NumArguments != RequiredArgsOld))
  276.         {
  277.             sprintf (MsgBuffer, "%4.4s requires %u",
  278.                 PredefinedNames[Index].Info.Name, RequiredArgsCurrent);
  279.  
  280.             if (MethodInfo->NumArguments > RequiredArgsCurrent)
  281.             {
  282.                 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
  283.                     MsgBuffer);
  284.             }
  285.             else
  286.             {
  287.                 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_LO, Op,
  288.                     MsgBuffer);
  289.             }
  290.         }
  291.  
  292.         /*
  293.          * Check if method returns no value, but the predefined name is
  294.          * required to return a value
  295.          */
  296.         if (MethodInfo->NumReturnNoValue &&
  297.             PredefinedNames[Index].Info.ExpectedBtypes)
  298.         {
  299.             ApGetExpectedTypes (StringBuffer,
  300.                 PredefinedNames[Index].Info.ExpectedBtypes);
  301.  
  302.             sprintf (MsgBuffer, "%s required for %4.4s",
  303.                 StringBuffer, PredefinedNames[Index].Info.Name);
  304.  
  305.             AslError (ASL_WARNING, ASL_MSG_RESERVED_RETURN_VALUE, Op,
  306.                 MsgBuffer);
  307.         }
  308.         break;
  309.     }
  310. }
  311.  
  312.  
  313. /*******************************************************************************
  314.  *
  315.  * FUNCTION:    ApCheckPredefinedReturnValue
  316.  *
  317.  * PARAMETERS:  Op              - A parse node of type "RETURN".
  318.  *              MethodInfo      - Saved info about this method
  319.  *
  320.  * RETURN:      None
  321.  *
  322.  * DESCRIPTION: If method is a predefined name, attempt to validate the return
  323.  *              value. Only "static" types can be validated - a simple return
  324.  *              of an integer/string/buffer/package or a named reference to
  325.  *              a static object. Values such as a Localx or Argx or a control
  326.  *              method invocation are not checked.
  327.  *
  328.  ******************************************************************************/
  329.  
  330. void
  331. ApCheckPredefinedReturnValue (
  332.     ACPI_PARSE_OBJECT       *Op,
  333.     ASL_METHOD_INFO         *MethodInfo)
  334. {
  335.     UINT32                  Index;
  336.     ACPI_PARSE_OBJECT       *ReturnValueOp;
  337.  
  338.  
  339.     /* Check parent method for a match against the predefined name list */
  340.  
  341.     Index = ApCheckForPredefinedName (MethodInfo->Op,
  342.                 MethodInfo->Op->Asl.NameSeg);
  343.  
  344.     switch (Index)
  345.     {
  346.     case ACPI_NOT_RESERVED_NAME:        /* No underscore or _Txx or _xxx name not matched */
  347.     case ACPI_PREDEFINED_NAME:          /* Resource Name or reserved scope name */
  348.     case ACPI_COMPILER_RESERVED_NAME:   /* A _Txx that was not emitted by compiler */
  349.     case ACPI_EVENT_RESERVED_NAME:      /* _Lxx/_Exx/_Wxx/_Qxx methods */
  350.  
  351.         /* Just return, nothing to do */
  352.         return;
  353.  
  354.     default: /* A standard predefined ACPI name */
  355.  
  356.         /* Exit if no return value expected */
  357.  
  358.         if (!PredefinedNames[Index].Info.ExpectedBtypes)
  359.         {
  360.             return;
  361.         }
  362.  
  363.         /* Get the object returned, it is the next argument */
  364.  
  365.         ReturnValueOp = Op->Asl.Child;
  366.         switch (ReturnValueOp->Asl.ParseOpcode)
  367.         {
  368.         case PARSEOP_ZERO:
  369.         case PARSEOP_ONE:
  370.         case PARSEOP_ONES:
  371.         case PARSEOP_INTEGER:
  372.         case PARSEOP_STRING_LITERAL:
  373.         case PARSEOP_BUFFER:
  374.         case PARSEOP_PACKAGE:
  375.  
  376.             /* Static data return object - check against expected type */
  377.  
  378.             ApCheckObjectType (ReturnValueOp,
  379.                 PredefinedNames[Index].Info.ExpectedBtypes);
  380.             break;
  381.  
  382.         default:
  383.  
  384.             /*
  385.              * All other ops are very difficult or impossible to typecheck at
  386.              * compile time. These include all Localx, Argx, and method
  387.              * invocations. Also, NAMESEG and NAMESTRING because the type of
  388.              * any named object can be changed at runtime (for example,
  389.              * CopyObject will change the type of the target object.)
  390.              */
  391.             break;
  392.         }
  393.     }
  394. }
  395.  
  396.  
  397. /*******************************************************************************
  398.  *
  399.  * FUNCTION:    ApCheckForPredefinedObject
  400.  *
  401.  * PARAMETERS:  Op              - A parse node
  402.  *              Name            - The ACPI name to be checked
  403.  *
  404.  * RETURN:      None
  405.  *
  406.  * DESCRIPTION: Check for a predefined name for a static object (created via
  407.  *              the ASL Name operator). If it is a predefined ACPI name, ensure
  408.  *              that the name does not require any arguments (which would
  409.  *              require a control method implemenation of the name), and that
  410.  *              the type of the object is one of the expected types for the
  411.  *              predefined name.
  412.  *
  413.  ******************************************************************************/
  414.  
  415. void
  416. ApCheckForPredefinedObject (
  417.     ACPI_PARSE_OBJECT       *Op,
  418.     char                    *Name)
  419. {
  420.     UINT32                  Index;
  421.  
  422.  
  423.     /*
  424.      * Check for a real predefined name -- not a resource descriptor name
  425.      * or a predefined scope name
  426.      */
  427.     Index = ApCheckForPredefinedName (Op, Name);
  428.  
  429.     switch (Index)
  430.     {
  431.     case ACPI_NOT_RESERVED_NAME:        /* No underscore or _Txx or _xxx name not matched */
  432.     case ACPI_PREDEFINED_NAME:          /* Resource Name or reserved scope name */
  433.     case ACPI_COMPILER_RESERVED_NAME:   /* A _Txx that was not emitted by compiler */
  434.  
  435.         /* Nothing to do */
  436.         return;
  437.  
  438.     case ACPI_EVENT_RESERVED_NAME:      /* _Lxx/_Exx/_Wxx/_Qxx methods */
  439.  
  440.         /*
  441.          * These names must be control methods, by definition in ACPI spec.
  442.          * Also because they are defined to return no value. None of them
  443.          * require any arguments.
  444.          */
  445.         AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
  446.             "with zero arguments");
  447.         return;
  448.  
  449.     default: /* A standard predefined ACPI name */
  450.  
  451.         /*
  452.          * If this predefined name requires input arguments, then
  453.          * it must be implemented as a control method
  454.          */
  455.         if (PredefinedNames[Index].Info.ParamCount > 0)
  456.         {
  457.             AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
  458.                 "with arguments");
  459.             return;
  460.         }
  461.  
  462.         /*
  463.          * If no return value is expected from this predefined name, then
  464.          * it follows that it must be implemented as a control method
  465.          * (with zero args, because the args > 0 case was handled above)
  466.          * Examples are: _DIS, _INI, _IRC, _OFF, _ON, _PSx
  467.          */
  468.         if (!PredefinedNames[Index].Info.ExpectedBtypes)
  469.         {
  470.             AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
  471.                 "with zero arguments");
  472.             return;
  473.         }
  474.  
  475.         /* Typecheck the actual object, it is the next argument */
  476.  
  477.         ApCheckObjectType (Op->Asl.Child->Asl.Next,
  478.             PredefinedNames[Index].Info.ExpectedBtypes);
  479.         return;
  480.     }
  481. }
  482.  
  483.  
  484. /*******************************************************************************
  485.  *
  486.  * FUNCTION:    ApCheckForPredefinedName
  487.  *
  488.  * PARAMETERS:  Op              - A parse node
  489.  *              Name            - NameSeg to check
  490.  *
  491.  * RETURN:      None
  492.  *
  493.  * DESCRIPTION: Check a NameSeg against the reserved list.
  494.  *
  495.  ******************************************************************************/
  496.  
  497. UINT32
  498. ApCheckForPredefinedName (
  499.     ACPI_PARSE_OBJECT       *Op,
  500.     char                    *Name)
  501. {
  502.     UINT32                  i;
  503.  
  504.  
  505.     if (Name[0] == 0)
  506.     {
  507.         AcpiOsPrintf ("Found a null name, external = %s\n",
  508.             Op->Asl.ExternalName);
  509.     }
  510.  
  511.     /* All reserved names are prefixed with a single underscore */
  512.  
  513.     if (Name[0] != '_')
  514.     {
  515.         return (ACPI_NOT_RESERVED_NAME);
  516.     }
  517.  
  518.     /* Check for a standard predefined method name */
  519.  
  520.     for (i = 0; PredefinedNames[i].Info.Name[0]; i++)
  521.     {
  522.         if (ACPI_COMPARE_NAME (Name, PredefinedNames[i].Info.Name))
  523.         {
  524.             /* Return index into predefined array */
  525.             return (i);
  526.         }
  527.     }
  528.  
  529.     /* Check for resource names and predefined scope names */
  530.  
  531.     for (i = 0; ResourceNames[i].Info.Name[0]; i++)
  532.     {
  533.         if (ACPI_COMPARE_NAME (Name, ResourceNames[i].Info.Name))
  534.         {
  535.             return (ACPI_PREDEFINED_NAME);
  536.         }
  537.     }
  538.  
  539.     for (i = 0; ScopeNames[i].Info.Name[0]; i++)
  540.     {
  541.         if (ACPI_COMPARE_NAME (Name, ScopeNames[i].Info.Name))
  542.         {
  543.             return (ACPI_PREDEFINED_NAME);
  544.         }
  545.     }
  546.  
  547.     /* Check for _Lxx/_Exx/_Wxx/_Qxx/_T_x. Warning if unknown predefined name */
  548.  
  549.     return (ApCheckForSpecialName (Op, Name));
  550. }
  551.  
  552.  
  553. /*******************************************************************************
  554.  *
  555.  * FUNCTION:    ApCheckForSpecialName
  556.  *
  557.  * PARAMETERS:  Op              - A parse node
  558.  *              Name            - NameSeg to check
  559.  *
  560.  * RETURN:      None
  561.  *
  562.  * DESCRIPTION: Check for the "special" predefined names -
  563.  *              _Lxx, _Exx, _Qxx, _Wxx, and _T_x
  564.  *
  565.  ******************************************************************************/
  566.  
  567. static UINT32
  568. ApCheckForSpecialName (
  569.     ACPI_PARSE_OBJECT       *Op,
  570.     char                    *Name)
  571. {
  572.  
  573.     /*
  574.      * Check for the "special" predefined names. We already know that the
  575.      * first character is an underscore.
  576.      *   GPE:  _Lxx
  577.      *   GPE:  _Exx
  578.      *   GPE:  _Wxx
  579.      *   EC:   _Qxx
  580.      */
  581.     if ((Name[1] == 'L') ||
  582.         (Name[1] == 'E') ||
  583.         (Name[1] == 'W') ||
  584.         (Name[1] == 'Q'))
  585.     {
  586.         /* The next two characters must be hex digits */
  587.  
  588.         if ((isxdigit ((int) Name[2])) &&
  589.             (isxdigit ((int) Name[3])))
  590.         {
  591.             return (ACPI_EVENT_RESERVED_NAME);
  592.         }
  593.     }
  594.  
  595.     /* Check for the names reserved for the compiler itself: _T_x */
  596.  
  597.     else if ((Op->Asl.ExternalName[1] == 'T') &&
  598.              (Op->Asl.ExternalName[2] == '_'))
  599.     {
  600.         /* Ignore if actually emitted by the compiler */
  601.  
  602.         if (Op->Asl.CompileFlags & NODE_COMPILER_EMITTED)
  603.         {
  604.             return (ACPI_NOT_RESERVED_NAME);
  605.         }
  606.  
  607.         /*
  608.          * Was not actually emitted by the compiler. This is a special case,
  609.          * however. If the ASL code being compiled was the result of a
  610.          * dissasembly, it may possibly contain valid compiler-emitted names
  611.          * of the form "_T_x". We don't want to issue an error or even a
  612.          * warning and force the user to manually change the names. So, we
  613.          * will issue a remark instead.
  614.          */
  615.         AslError (ASL_REMARK, ASL_MSG_COMPILER_RESERVED, Op, Op->Asl.ExternalName);
  616.         return (ACPI_COMPILER_RESERVED_NAME);
  617.     }
  618.  
  619.     /*
  620.      * The name didn't match any of the known predefined names. Flag it as a
  621.      * warning, since the entire namespace starting with an underscore is
  622.      * reserved by the ACPI spec.
  623.      */
  624.     AslError (ASL_WARNING, ASL_MSG_UNKNOWN_RESERVED_NAME, Op,
  625.         Op->Asl.ExternalName);
  626.  
  627.     return (ACPI_NOT_RESERVED_NAME);
  628. }
  629.  
  630.  
  631. /*******************************************************************************
  632.  *
  633.  * FUNCTION:    ApCheckObjectType
  634.  *
  635.  * PARAMETERS:  Op              - Current parse node
  636.  *              ExpectedBtypes  - Bitmap of expected return type(s)
  637.  *
  638.  * RETURN:      None
  639.  *
  640.  * DESCRIPTION: Check if the object type is one of the types that is expected
  641.  *              by the predefined name. Only a limited number of object types
  642.  *              can be returned by the predefined names.
  643.  *
  644.  ******************************************************************************/
  645.  
  646. static void
  647. ApCheckObjectType (
  648.     ACPI_PARSE_OBJECT       *Op,
  649.     UINT32                  ExpectedBtypes)
  650. {
  651.     UINT32                  ReturnBtype;
  652.  
  653.  
  654.     switch (Op->Asl.ParseOpcode)
  655.     {
  656.     case PARSEOP_ZERO:
  657.     case PARSEOP_ONE:
  658.     case PARSEOP_ONES:
  659.     case PARSEOP_INTEGER:
  660.         ReturnBtype = ACPI_RTYPE_INTEGER;
  661.         break;
  662.  
  663.     case PARSEOP_BUFFER:
  664.         ReturnBtype = ACPI_RTYPE_BUFFER;
  665.         break;
  666.  
  667.     case PARSEOP_STRING_LITERAL:
  668.         ReturnBtype = ACPI_RTYPE_STRING;
  669.         break;
  670.  
  671.     case PARSEOP_PACKAGE:
  672.         ReturnBtype = ACPI_RTYPE_PACKAGE;
  673.         break;
  674.  
  675.     default:
  676.         /* Not one of the supported object types */
  677.  
  678.         goto TypeErrorExit;
  679.     }
  680.  
  681.     /* Exit if the object is one of the expected types */
  682.  
  683.     if (ReturnBtype & ExpectedBtypes)
  684.     {
  685.         return;
  686.     }
  687.  
  688.  
  689. TypeErrorExit:
  690.  
  691.     /* Format the expected types and emit an error message */
  692.  
  693.     ApGetExpectedTypes (StringBuffer, ExpectedBtypes);
  694.  
  695.     sprintf (MsgBuffer, "found %s, requires %s",
  696.         UtGetOpName (Op->Asl.ParseOpcode), StringBuffer);
  697.  
  698.     AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op,
  699.         MsgBuffer);
  700. }
  701.  
  702.  
  703. /*******************************************************************************
  704.  *
  705.  * FUNCTION:    ApDisplayReservedNames
  706.  *
  707.  * PARAMETERS:  None
  708.  *
  709.  * RETURN:      None
  710.  *
  711.  * DESCRIPTION: Dump information about the ACPI predefined names and predefined
  712.  *              resource descriptor names.
  713.  *
  714.  ******************************************************************************/
  715.  
  716. void
  717. ApDisplayReservedNames (
  718.     void)
  719. {
  720.     const ACPI_PREDEFINED_INFO  *ThisName;
  721.     char                        TypeBuffer[48]; /* Room for 5 types */
  722.     UINT32                      Count;
  723.  
  724.  
  725.     /*
  726.      * Predefined names/methods
  727.      */
  728.     printf ("\nPredefined Name Information\n\n");
  729.  
  730.     Count = 0;
  731.     ThisName = PredefinedNames;
  732.     while (ThisName->Info.Name[0])
  733.     {
  734.         printf ("%4.4s    Requires %u arguments, ",
  735.             ThisName->Info.Name, ThisName->Info.ParamCount & 0x0F);
  736.  
  737.         if (ThisName->Info.ExpectedBtypes)
  738.         {
  739.             ApGetExpectedTypes (TypeBuffer, ThisName->Info.ExpectedBtypes);
  740.             printf ("Must return: %s\n", TypeBuffer);
  741.         }
  742.         else
  743.         {
  744.             printf ("No return value\n");
  745.         }
  746.  
  747.         /*
  748.          * Skip next entry in the table if this name returns a Package
  749.          * (next entry contains the package info)
  750.          */
  751.         if (ThisName->Info.ExpectedBtypes & ACPI_RTYPE_PACKAGE)
  752.         {
  753.             ThisName++;
  754.         }
  755.  
  756.         Count++;
  757.         ThisName++;
  758.     }
  759.  
  760.     printf ("%u Predefined Names are recognized\n", Count);
  761.  
  762.     /*
  763.      * Resource Descriptor names
  764.      */
  765.     printf ("\nResource Descriptor Predefined Names\n\n");
  766.  
  767.     Count = 0;
  768.     ThisName = ResourceNames;
  769.     while (ThisName->Info.Name[0])
  770.     {
  771.         printf ("%4.4s    Resource Descriptor\n", ThisName->Info.Name);
  772.         Count++;
  773.         ThisName++;
  774.     }
  775.  
  776.     printf ("%u Resource Descriptor Names are recognized\n", Count);
  777.  
  778.     /*
  779.      * Predefined scope names
  780.      */
  781.     printf ("\nPredefined Scope Names\n\n");
  782.  
  783.     ThisName = ScopeNames;
  784.     while (ThisName->Info.Name[0])
  785.     {
  786.         printf ("%4.4s    Scope\n", ThisName->Info.Name);
  787.         ThisName++;
  788.     }
  789. }
  790.  
  791.  
  792. /*******************************************************************************
  793.  *
  794.  * FUNCTION:    ApGetExpectedTypes
  795.  *
  796.  * PARAMETERS:  Buffer              - Where the formatted string is returned
  797.  *              ExpectedBTypes      - Bitfield of expected data types
  798.  *
  799.  * RETURN:      None, formatted string
  800.  *
  801.  * DESCRIPTION: Format the expected object types into a printable string.
  802.  *
  803.  ******************************************************************************/
  804.  
  805. static void
  806. ApGetExpectedTypes (
  807.     char                        *Buffer,
  808.     UINT32                      ExpectedBtypes)
  809. {
  810.     UINT32                      ThisRtype;
  811.     UINT32                      i;
  812.     UINT32                      j;
  813.  
  814.  
  815.     j = 1;
  816.     Buffer[0] = 0;
  817.     ThisRtype = ACPI_RTYPE_INTEGER;
  818.  
  819.     for (i = 0; i < ACPI_NUM_RTYPES; i++)
  820.     {
  821.         /* If one of the expected types, concatenate the name of this type */
  822.  
  823.         if (ExpectedBtypes & ThisRtype)
  824.         {
  825.             ACPI_STRCAT (Buffer, &AcpiRtypeNames[i][j]);
  826.             j = 0;              /* Use name separator from now on */
  827.         }
  828.         ThisRtype <<= 1;    /* Next Rtype */
  829.     }
  830. }
  831.  
  832.