761 lines
23 KiB
C
761 lines
23 KiB
C
/******************************************************************************
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*
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* Module Name: aslpredef - support for ACPI predefined names
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define ACPI_CREATE_PREDEFINED_TABLE
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#define ACPI_CREATE_RESOURCE_TABLE
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#include "aslcompiler.h"
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#include "aslcompiler.y.h"
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#include "acpredef.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_COMPILER
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ACPI_MODULE_NAME ("aslpredef")
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/* Local prototypes */
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static void
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ApCheckForUnexpectedReturnValue (
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ACPI_PARSE_OBJECT *Op,
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ASL_METHOD_INFO *MethodInfo);
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static UINT32
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ApCheckForSpecialName (
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ACPI_PARSE_OBJECT *Op,
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char *Name);
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/*******************************************************************************
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*
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* FUNCTION: ApCheckForPredefinedMethod
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*
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* PARAMETERS: Op - A parse node of type "METHOD".
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* MethodInfo - Saved info about this method
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*
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* RETURN: None
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*
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* DESCRIPTION: If method is a predefined name, check that the number of
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* arguments and the return type (returns a value or not)
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* is correct.
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*
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******************************************************************************/
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BOOLEAN
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ApCheckForPredefinedMethod (
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ACPI_PARSE_OBJECT *Op,
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ASL_METHOD_INFO *MethodInfo)
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{
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UINT32 Index;
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UINT32 RequiredArgCount;
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const ACPI_PREDEFINED_INFO *ThisName;
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/* Check for a match against the predefined name list */
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Index = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
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switch (Index)
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{
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case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
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case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
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case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
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/* Just return, nothing to do */
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return (FALSE);
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case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
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Gbl_ReservedMethods++;
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/* NumArguments must be zero for all _Lxx/_Exx/_Wxx/_Qxx methods */
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if (MethodInfo->NumArguments != 0)
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{
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sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 0);
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AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
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MsgBuffer);
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}
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break;
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default:
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/*
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* Matched a predefined method name
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*
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* Validate the ASL-defined argument count. Allow two different legal
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* arg counts.
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*/
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Gbl_ReservedMethods++;
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ThisName = &AcpiGbl_PredefinedMethods[Index];
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RequiredArgCount = ThisName->Info.ArgumentList & METHOD_ARG_MASK;
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if (MethodInfo->NumArguments != RequiredArgCount)
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{
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sprintf (MsgBuffer, "%4.4s requires %u",
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ThisName->Info.Name, RequiredArgCount);
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if ((MethodInfo->NumArguments > RequiredArgCount) &&
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!(ThisName->Info.ArgumentList & ARG_COUNT_IS_MINIMUM))
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{
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AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
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MsgBuffer);
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}
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else
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{
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AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_LO, Op,
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MsgBuffer);
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}
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}
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/*
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* Check if method returns no value, but the predefined name is
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* required to return a value
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*/
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if (MethodInfo->NumReturnNoValue &&
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ThisName->Info.ExpectedBtypes)
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{
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AcpiUtGetExpectedReturnTypes (StringBuffer,
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ThisName->Info.ExpectedBtypes);
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sprintf (MsgBuffer, "%s required for %4.4s",
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StringBuffer, ThisName->Info.Name);
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AslError (ASL_WARNING, ASL_MSG_RESERVED_RETURN_VALUE, Op,
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MsgBuffer);
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}
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break;
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}
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return (TRUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckForUnexpectedReturnValue
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*
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* PARAMETERS: Op - A parse node of type "RETURN".
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* MethodInfo - Saved info about this method
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*
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* RETURN: None
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*
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* DESCRIPTION: Check for an unexpected return value from a predefined method.
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* Invoked for predefined methods that are defined to not return
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* any value. If there is a return value, issue a remark, since
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* the ASL writer may be confused as to the method definition
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* and/or functionality.
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*
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* Note: We ignore all return values of "Zero", since this is what a standalone
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* Return() statement will always generate -- so we ignore it here --
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* i.e., there is no difference between Return() and Return(Zero).
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* Also, a null Return() will be disassembled to return(Zero) -- so, we
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* don't want to generate extraneous remarks/warnings for a disassembled
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* ASL file.
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*
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******************************************************************************/
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static void
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ApCheckForUnexpectedReturnValue (
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ACPI_PARSE_OBJECT *Op,
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ASL_METHOD_INFO *MethodInfo)
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{
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ACPI_PARSE_OBJECT *ReturnValueOp;
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/* Ignore Return() and Return(Zero) (they are the same) */
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ReturnValueOp = Op->Asl.Child;
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if (ReturnValueOp->Asl.ParseOpcode == PARSEOP_ZERO)
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{
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return;
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}
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/* We have a valid return value, but the reserved name did not expect it */
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AslError (ASL_WARNING, ASL_MSG_RESERVED_NO_RETURN_VAL,
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Op, MethodInfo->Op->Asl.ExternalName);
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckPredefinedReturnValue
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*
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* PARAMETERS: Op - A parse node of type "RETURN".
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* MethodInfo - Saved info about this method
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*
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* RETURN: None
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*
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* DESCRIPTION: If method is a predefined name, attempt to validate the return
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* value. Only "static" types can be validated - a simple return
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* of an integer/string/buffer/package or a named reference to
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* a static object. Values such as a Localx or Argx or a control
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* method invocation are not checked. Issue a warning if there is
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* a valid return value, but the reserved method defines no
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* return value.
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*
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******************************************************************************/
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void
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ApCheckPredefinedReturnValue (
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ACPI_PARSE_OBJECT *Op,
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ASL_METHOD_INFO *MethodInfo)
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{
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UINT32 Index;
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ACPI_PARSE_OBJECT *ReturnValueOp;
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const ACPI_PREDEFINED_INFO *ThisName;
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/* Check parent method for a match against the predefined name list */
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Index = ApCheckForPredefinedName (MethodInfo->Op,
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MethodInfo->Op->Asl.NameSeg);
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switch (Index)
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{
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case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
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/* No return value expected, warn if there is one */
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ApCheckForUnexpectedReturnValue (Op, MethodInfo);
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return;
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case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
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case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
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case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
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/* Just return, nothing to do */
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return;
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default: /* A standard predefined ACPI name */
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ThisName = &AcpiGbl_PredefinedMethods[Index];
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if (!ThisName->Info.ExpectedBtypes)
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{
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/* No return value expected, warn if there is one */
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ApCheckForUnexpectedReturnValue (Op, MethodInfo);
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return;
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}
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/* Get the object returned, it is the next argument */
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ReturnValueOp = Op->Asl.Child;
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switch (ReturnValueOp->Asl.ParseOpcode)
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{
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case PARSEOP_ZERO:
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case PARSEOP_ONE:
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case PARSEOP_ONES:
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case PARSEOP_INTEGER:
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case PARSEOP_STRING_LITERAL:
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case PARSEOP_BUFFER:
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case PARSEOP_PACKAGE:
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/* Static data return object - check against expected type */
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ApCheckObjectType (ThisName->Info.Name, ReturnValueOp,
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ThisName->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT);
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/* For packages, check the individual package elements */
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if (ReturnValueOp->Asl.ParseOpcode == PARSEOP_PACKAGE)
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{
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ApCheckPackage (ReturnValueOp, ThisName);
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}
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break;
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default:
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/*
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* All other ops are very difficult or impossible to typecheck at
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* compile time. These include all Localx, Argx, and method
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* invocations. Also, NAMESEG and NAMESTRING because the type of
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* any named object can be changed at runtime (for example,
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* CopyObject will change the type of the target object.)
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*/
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break;
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckForPredefinedObject
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*
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* PARAMETERS: Op - A parse node
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* Name - The ACPI name to be checked
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*
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* RETURN: None
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*
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* DESCRIPTION: Check for a predefined name for a static object (created via
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* the ASL Name operator). If it is a predefined ACPI name, ensure
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* that the name does not require any arguments (which would
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* require a control method implemenation of the name), and that
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* the type of the object is one of the expected types for the
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* predefined name.
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*
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******************************************************************************/
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void
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ApCheckForPredefinedObject (
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ACPI_PARSE_OBJECT *Op,
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char *Name)
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{
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UINT32 Index;
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ACPI_PARSE_OBJECT *ObjectOp;
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const ACPI_PREDEFINED_INFO *ThisName;
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/*
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* Check for a real predefined name -- not a resource descriptor name
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* or a predefined scope name
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*/
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Index = ApCheckForPredefinedName (Op, Name);
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switch (Index)
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{
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case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
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case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
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case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
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/* Nothing to do */
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return;
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case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
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/*
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* These names must be control methods, by definition in ACPI spec.
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* Also because they are defined to return no value. None of them
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* require any arguments.
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*/
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AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
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"with zero arguments");
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return;
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default:
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break;
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}
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/* A standard predefined ACPI name */
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/*
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* If this predefined name requires input arguments, then
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* it must be implemented as a control method
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*/
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ThisName = &AcpiGbl_PredefinedMethods[Index];
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if ((ThisName->Info.ArgumentList & METHOD_ARG_MASK) > 0)
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{
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AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
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"with arguments");
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return;
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}
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/*
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* If no return value is expected from this predefined name, then
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* it follows that it must be implemented as a control method
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* (with zero args, because the args > 0 case was handled above)
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* Examples are: _DIS, _INI, _IRC, _OFF, _ON, _PSx
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*/
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if (!ThisName->Info.ExpectedBtypes)
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{
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AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
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"with zero arguments");
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return;
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}
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/* Typecheck the actual object, it is the next argument */
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ObjectOp = Op->Asl.Child->Asl.Next;
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ApCheckObjectType (ThisName->Info.Name, Op->Asl.Child->Asl.Next,
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ThisName->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT);
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/* For packages, check the individual package elements */
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if (ObjectOp->Asl.ParseOpcode == PARSEOP_PACKAGE)
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{
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ApCheckPackage (ObjectOp, ThisName);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckForPredefinedName
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*
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* PARAMETERS: Op - A parse node
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* Name - NameSeg to check
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*
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* RETURN: None
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*
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* DESCRIPTION: Check a NameSeg against the reserved list.
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*
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******************************************************************************/
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UINT32
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ApCheckForPredefinedName (
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ACPI_PARSE_OBJECT *Op,
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char *Name)
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{
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UINT32 i;
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const ACPI_PREDEFINED_INFO *ThisName;
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if (Name[0] == 0)
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{
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AcpiOsPrintf ("Found a null name, external = %s\n",
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Op->Asl.ExternalName);
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}
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/* All reserved names are prefixed with a single underscore */
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if (Name[0] != '_')
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{
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return (ACPI_NOT_RESERVED_NAME);
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}
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/* Check for a standard predefined method name */
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ThisName = AcpiGbl_PredefinedMethods;
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for (i = 0; ThisName->Info.Name[0]; i++)
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{
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if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name))
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{
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/* Return index into predefined array */
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return (i);
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}
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ThisName++; /* Does not account for extra package data, but is OK */
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}
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/* Check for resource names and predefined scope names */
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ThisName = AcpiGbl_ResourceNames;
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while (ThisName->Info.Name[0])
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{
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if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name))
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{
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return (ACPI_PREDEFINED_NAME);
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}
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ThisName++;
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}
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ThisName = AcpiGbl_ScopeNames;
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while (ThisName->Info.Name[0])
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{
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if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name))
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{
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return (ACPI_PREDEFINED_NAME);
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}
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ThisName++;
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}
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/* Check for _Lxx/_Exx/_Wxx/_Qxx/_T_x. Warning if unknown predefined name */
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return (ApCheckForSpecialName (Op, Name));
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckForSpecialName
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*
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* PARAMETERS: Op - A parse node
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* Name - NameSeg to check
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*
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* RETURN: None
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*
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* DESCRIPTION: Check for the "special" predefined names -
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* _Lxx, _Exx, _Qxx, _Wxx, and _T_x
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*
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******************************************************************************/
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static UINT32
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ApCheckForSpecialName (
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ACPI_PARSE_OBJECT *Op,
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char *Name)
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{
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/*
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* Check for the "special" predefined names. We already know that the
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* first character is an underscore.
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* GPE: _Lxx
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* GPE: _Exx
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* GPE: _Wxx
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* EC: _Qxx
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*/
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if ((Name[1] == 'L') ||
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(Name[1] == 'E') ||
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(Name[1] == 'W') ||
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(Name[1] == 'Q'))
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{
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/* The next two characters must be hex digits */
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if ((isxdigit ((int) Name[2])) &&
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(isxdigit ((int) Name[3])))
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{
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return (ACPI_EVENT_RESERVED_NAME);
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}
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}
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/* Check for the names reserved for the compiler itself: _T_x */
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else if ((Op->Asl.ExternalName[1] == 'T') &&
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(Op->Asl.ExternalName[2] == '_'))
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{
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/* Ignore if actually emitted by the compiler */
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if (Op->Asl.CompileFlags & NODE_COMPILER_EMITTED)
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{
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return (ACPI_NOT_RESERVED_NAME);
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}
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/*
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* Was not actually emitted by the compiler. This is a special case,
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* however. If the ASL code being compiled was the result of a
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* dissasembly, it may possibly contain valid compiler-emitted names
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* of the form "_T_x". We don't want to issue an error or even a
|
|
* warning and force the user to manually change the names. So, we
|
|
* will issue a remark instead.
|
|
*/
|
|
AslError (ASL_REMARK, ASL_MSG_COMPILER_RESERVED, Op, Op->Asl.ExternalName);
|
|
return (ACPI_COMPILER_RESERVED_NAME);
|
|
}
|
|
|
|
/*
|
|
* The name didn't match any of the known predefined names. Flag it as a
|
|
* warning, since the entire namespace starting with an underscore is
|
|
* reserved by the ACPI spec.
|
|
*/
|
|
AslError (ASL_WARNING, ASL_MSG_UNKNOWN_RESERVED_NAME, Op,
|
|
Op->Asl.ExternalName);
|
|
|
|
return (ACPI_NOT_RESERVED_NAME);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: ApCheckObjectType
|
|
*
|
|
* PARAMETERS: PredefinedName - Name of the predefined object we are checking
|
|
* Op - Current parse node
|
|
* ExpectedBtypes - Bitmap of expected return type(s)
|
|
* PackageIndex - Index of object within parent package (if
|
|
* applicable - ACPI_NOT_PACKAGE_ELEMENT
|
|
* otherwise)
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Check if the object type is one of the types that is expected
|
|
* by the predefined name. Only a limited number of object types
|
|
* can be returned by the predefined names.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
ApCheckObjectType (
|
|
const char *PredefinedName,
|
|
ACPI_PARSE_OBJECT *Op,
|
|
UINT32 ExpectedBtypes,
|
|
UINT32 PackageIndex)
|
|
{
|
|
UINT32 ReturnBtype;
|
|
char *TypeName;
|
|
|
|
|
|
if (!Op)
|
|
{
|
|
return (AE_TYPE);
|
|
}
|
|
|
|
/* Map the parse opcode to a bitmapped return type (RTYPE) */
|
|
|
|
switch (Op->Asl.ParseOpcode)
|
|
{
|
|
case PARSEOP_ZERO:
|
|
case PARSEOP_ONE:
|
|
case PARSEOP_ONES:
|
|
case PARSEOP_INTEGER:
|
|
ReturnBtype = ACPI_RTYPE_INTEGER;
|
|
TypeName = "Integer";
|
|
break;
|
|
|
|
case PARSEOP_STRING_LITERAL:
|
|
ReturnBtype = ACPI_RTYPE_STRING;
|
|
TypeName = "String";
|
|
break;
|
|
|
|
case PARSEOP_BUFFER:
|
|
ReturnBtype = ACPI_RTYPE_BUFFER;
|
|
TypeName = "Buffer";
|
|
break;
|
|
|
|
case PARSEOP_PACKAGE:
|
|
case PARSEOP_VAR_PACKAGE:
|
|
ReturnBtype = ACPI_RTYPE_PACKAGE;
|
|
TypeName = "Package";
|
|
break;
|
|
|
|
case PARSEOP_NAMESEG:
|
|
case PARSEOP_NAMESTRING:
|
|
ReturnBtype = ACPI_RTYPE_REFERENCE;
|
|
TypeName = "Reference";
|
|
break;
|
|
|
|
default:
|
|
/* Not one of the supported object types */
|
|
|
|
TypeName = UtGetOpName (Op->Asl.ParseOpcode);
|
|
goto TypeErrorExit;
|
|
}
|
|
|
|
/* Exit if the object is one of the expected types */
|
|
|
|
if (ReturnBtype & ExpectedBtypes)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
TypeErrorExit:
|
|
|
|
/* Format the expected types and emit an error message */
|
|
|
|
AcpiUtGetExpectedReturnTypes (StringBuffer, ExpectedBtypes);
|
|
|
|
if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
|
|
{
|
|
sprintf (MsgBuffer, "%4.4s: found %s, %s required",
|
|
PredefinedName, TypeName, StringBuffer);
|
|
}
|
|
else
|
|
{
|
|
sprintf (MsgBuffer, "%4.4s: found %s at index %u, %s required",
|
|
PredefinedName, TypeName, PackageIndex, StringBuffer);
|
|
}
|
|
|
|
AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op, MsgBuffer);
|
|
return (AE_TYPE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: ApDisplayReservedNames
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Dump information about the ACPI predefined names and predefined
|
|
* resource descriptor names.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
ApDisplayReservedNames (
|
|
void)
|
|
{
|
|
const ACPI_PREDEFINED_INFO *ThisName;
|
|
UINT32 Count;
|
|
UINT32 NumTypes;
|
|
|
|
|
|
/*
|
|
* Predefined names/methods
|
|
*/
|
|
printf ("\nPredefined Name Information\n\n");
|
|
|
|
Count = 0;
|
|
ThisName = AcpiGbl_PredefinedMethods;
|
|
while (ThisName->Info.Name[0])
|
|
{
|
|
AcpiUtDisplayPredefinedMethod (MsgBuffer, ThisName, FALSE);
|
|
Count++;
|
|
ThisName = AcpiUtGetNextPredefinedMethod (ThisName);
|
|
}
|
|
|
|
printf ("%u Predefined Names are recognized\n", Count);
|
|
|
|
/*
|
|
* Resource Descriptor names
|
|
*/
|
|
printf ("\nPredefined Names for Resource Descriptor Fields\n\n");
|
|
|
|
Count = 0;
|
|
ThisName = AcpiGbl_ResourceNames;
|
|
while (ThisName->Info.Name[0])
|
|
{
|
|
NumTypes = AcpiUtGetResourceBitWidth (MsgBuffer,
|
|
ThisName->Info.ArgumentList);
|
|
|
|
printf ("%4.4s Field is %s bits wide%s\n",
|
|
ThisName->Info.Name, MsgBuffer,
|
|
(NumTypes > 1) ? " (depending on descriptor type)" : "");
|
|
|
|
Count++;
|
|
ThisName++;
|
|
}
|
|
|
|
printf ("%u Resource Descriptor Field Names are recognized\n", Count);
|
|
|
|
/*
|
|
* Predefined scope names
|
|
*/
|
|
printf ("\nPredefined Scope/Device Names (automatically created at root)\n\n");
|
|
|
|
ThisName = AcpiGbl_ScopeNames;
|
|
while (ThisName->Info.Name[0])
|
|
{
|
|
printf ("%4.4s Scope/Device\n", ThisName->Info.Name);
|
|
ThisName++;
|
|
}
|
|
}
|