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/******************************************************************************
*
* Module Name: nspredef - Validation of ACPI predefined methods and objects
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#define ACPI_CREATE_PREDEFINED_TABLE
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#include <contrib/dev/acpica/include/acpredef.h>
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nspredef")
/*******************************************************************************
*
* This module validates predefined ACPI objects that appear in the namespace,
* at the time they are evaluated (via AcpiEvaluateObject). The purpose of this
* validation is to detect problems with BIOS-exposed predefined ACPI objects
* before the results are returned to the ACPI-related drivers.
*
* There are several areas that are validated:
*
* 1) The number of input arguments as defined by the method/object in the
* ASL is validated against the ACPI specification.
* 2) The type of the return object (if any) is validated against the ACPI
* specification.
* 3) For returned package objects, the count of package elements is
* validated, as well as the type of each package element. Nested
* packages are supported.
*
* For any problems found, a warning message is issued.
*
******************************************************************************/
/* Local prototypes */
static ACPI_STATUS
AcpiNsCheckPackage (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr);
static ACPI_STATUS
AcpiNsCheckPackageList (
ACPI_PREDEFINED_DATA *Data,
const ACPI_PREDEFINED_INFO *Package,
ACPI_OPERAND_OBJECT **Elements,
UINT32 Count);
static ACPI_STATUS
AcpiNsCheckPackageElements (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **Elements,
UINT8 Type1,
UINT32 Count1,
UINT8 Type2,
UINT32 Count2,
UINT32 StartIndex);
static ACPI_STATUS
AcpiNsCheckObjectType (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr,
UINT32 ExpectedBtypes,
UINT32 PackageIndex);
static ACPI_STATUS
AcpiNsCheckReference (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT *ReturnObject);
static void
AcpiNsGetExpectedTypes (
char *Buffer,
UINT32 ExpectedBtypes);
/*
* Names for the types that can be returned by the predefined objects.
* Used for warning messages. Must be in the same order as the ACPI_RTYPEs
*/
static const char *AcpiRtypeNames[] =
{
"/Integer",
"/String",
"/Buffer",
"/Package",
"/Reference",
};
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckPredefinedNames
*
* PARAMETERS: Node - Namespace node for the method/object
* UserParamCount - Number of parameters actually passed
* ReturnStatus - Status from the object evaluation
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status
*
* DESCRIPTION: Check an ACPI name for a match in the predefined name list.
*
******************************************************************************/
ACPI_STATUS
AcpiNsCheckPredefinedNames (
ACPI_NAMESPACE_NODE *Node,
UINT32 UserParamCount,
ACPI_STATUS ReturnStatus,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_STATUS Status = AE_OK;
const ACPI_PREDEFINED_INFO *Predefined;
char *Pathname;
ACPI_PREDEFINED_DATA *Data;
/* Match the name for this method/object against the predefined list */
Predefined = AcpiNsCheckForPredefinedName (Node);
/* Get the full pathname to the object, for use in warning messages */
Pathname = AcpiNsGetExternalPathname (Node);
if (!Pathname)
{
return (AE_OK); /* Could not get pathname, ignore */
}
/*
* Check that the parameter count for this method matches the ASL
* definition. For predefined names, ensure that both the caller and
* the method itself are in accordance with the ACPI specification.
*/
AcpiNsCheckParameterCount (Pathname, Node, UserParamCount, Predefined);
/* If not a predefined name, we cannot validate the return object */
if (!Predefined)
{
goto Cleanup;
}
/*
* If the method failed or did not actually return an object, we cannot
* validate the return object
*/
if ((ReturnStatus != AE_OK) && (ReturnStatus != AE_CTRL_RETURN_VALUE))
{
goto Cleanup;
}
/*
* If there is no return value, check if we require a return value for
* this predefined name. Either one return value is expected, or none,
* for both methods and other objects.
*
* Exit now if there is no return object. Warning if one was expected.
*/
if (!ReturnObject)
{
if ((Predefined->Info.ExpectedBtypes) &&
(!(Predefined->Info.ExpectedBtypes & ACPI_RTYPE_NONE)))
{
ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
"Missing expected return value"));
Status = AE_AML_NO_RETURN_VALUE;
}
goto Cleanup;
}
/*
* 1) We have a return value, but if one wasn't expected, just exit, this is
* not a problem. For example, if the "Implicit Return" feature is
* enabled, methods will always return a value.
*
* 2) If the return value can be of any type, then we cannot perform any
* validation, exit.
*/
if ((!Predefined->Info.ExpectedBtypes) ||
(Predefined->Info.ExpectedBtypes == ACPI_RTYPE_ALL))
{
goto Cleanup;
}
/* Create the parameter data block for object validation */
Data = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PREDEFINED_DATA));
if (!Data)
{
goto Cleanup;
}
Data->Predefined = Predefined;
Data->NodeFlags = Node->Flags;
Data->Pathname = Pathname;
/*
* Check that the type of the main return object is what is expected
* for this predefined name
*/
Status = AcpiNsCheckObjectType (Data, ReturnObjectPtr,
Predefined->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/*
* For returned Package objects, check the type of all sub-objects.
* Note: Package may have been newly created by call above.
*/
if ((*ReturnObjectPtr)->Common.Type == ACPI_TYPE_PACKAGE)
{
Data->ParentPackage = *ReturnObjectPtr;
Status = AcpiNsCheckPackage (Data, ReturnObjectPtr);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
}
/*
* The return object was OK, or it was successfully repaired above.
* Now make some additional checks such as verifying that package
* objects are sorted correctly (if required) or buffer objects have
* the correct data width (bytes vs. dwords). These repairs are
* performed on a per-name basis, i.e., the code is specific to
* particular predefined names.
*/
Status = AcpiNsComplexRepairs (Data, Node, Status, ReturnObjectPtr);
Exit:
/*
* If the object validation failed or if we successfully repaired one
* or more objects, mark the parent node to suppress further warning
* messages during the next evaluation of the same method/object.
*/
if (ACPI_FAILURE (Status) || (Data->Flags & ACPI_OBJECT_REPAIRED))
{
Node->Flags |= ANOBJ_EVALUATED;
}
ACPI_FREE (Data);
Cleanup:
ACPI_FREE (Pathname);
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckParameterCount
*
* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
* Node - Namespace node for the method/object
* UserParamCount - Number of args passed in by the caller
* Predefined - Pointer to entry in predefined name table
*
* RETURN: None
*
* DESCRIPTION: Check that the declared (in ASL/AML) parameter count for a
* predefined name is what is expected (i.e., what is defined in
* the ACPI specification for this predefined name.)
*
******************************************************************************/
void
AcpiNsCheckParameterCount (
char *Pathname,
ACPI_NAMESPACE_NODE *Node,
UINT32 UserParamCount,
const ACPI_PREDEFINED_INFO *Predefined)
{
UINT32 ParamCount;
UINT32 RequiredParamsCurrent;
UINT32 RequiredParamsOld;
/* Methods have 0-7 parameters. All other types have zero. */
ParamCount = 0;
if (Node->Type == ACPI_TYPE_METHOD)
{
ParamCount = Node->Object->Method.ParamCount;
}
if (!Predefined)
{
/*
* Check the parameter count for non-predefined methods/objects.
*
* Warning if too few or too many arguments have been passed by the
* caller. An incorrect number of arguments may not cause the method
* to fail. However, the method will fail if there are too few
* arguments and the method attempts to use one of the missing ones.
*/
if (UserParamCount < ParamCount)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
"Insufficient arguments - needs %u, found %u",
ParamCount, UserParamCount));
}
else if (UserParamCount > ParamCount)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
"Excess arguments - needs %u, found %u",
ParamCount, UserParamCount));
}
return;
}
/*
* Validate the user-supplied parameter count.
* Allow two different legal argument counts (_SCP, etc.)
*/
RequiredParamsCurrent = Predefined->Info.ParamCount & 0x0F;
RequiredParamsOld = Predefined->Info.ParamCount >> 4;
if (UserParamCount != ACPI_UINT32_MAX)
{
if ((UserParamCount != RequiredParamsCurrent) &&
(UserParamCount != RequiredParamsOld))
{
ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
"Parameter count mismatch - "
"caller passed %u, ACPI requires %u",
UserParamCount, RequiredParamsCurrent));
}
}
/*
* Check that the ASL-defined parameter count is what is expected for
* this predefined name (parameter count as defined by the ACPI
* specification)
*/
if ((ParamCount != RequiredParamsCurrent) &&
(ParamCount != RequiredParamsOld))
{
ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, Node->Flags,
"Parameter count mismatch - ASL declared %u, ACPI requires %u",
ParamCount, RequiredParamsCurrent));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckForPredefinedName
*
* PARAMETERS: Node - Namespace node for the method/object
*
* RETURN: Pointer to entry in predefined table. NULL indicates not found.
*
* DESCRIPTION: Check an object name against the predefined object list.
*
******************************************************************************/
const ACPI_PREDEFINED_INFO *
AcpiNsCheckForPredefinedName (
ACPI_NAMESPACE_NODE *Node)
{
const ACPI_PREDEFINED_INFO *ThisName;
/* Quick check for a predefined name, first character must be underscore */
if (Node->Name.Ascii[0] != '_')
{
return (NULL);
}
/* Search info table for a predefined method/object name */
ThisName = PredefinedNames;
while (ThisName->Info.Name[0])
{
if (ACPI_COMPARE_NAME (Node->Name.Ascii, ThisName->Info.Name))
{
return (ThisName);
}
/*
* Skip next entry in the table if this name returns a Package
* (next entry contains the package info)
*/
if (ThisName->Info.ExpectedBtypes & ACPI_RTYPE_PACKAGE)
{
ThisName++;
}
ThisName++;
}
return (NULL); /* Not found */
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckPackage
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status
*
* DESCRIPTION: Check a returned package object for the correct count and
* correct type of all sub-objects.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsCheckPackage (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
const ACPI_PREDEFINED_INFO *Package;
ACPI_OPERAND_OBJECT **Elements;
ACPI_STATUS Status = AE_OK;
UINT32 ExpectedCount;
UINT32 Count;
UINT32 i;
ACPI_FUNCTION_NAME (NsCheckPackage);
/* The package info for this name is in the next table entry */
Package = Data->Predefined + 1;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"%s Validating return Package of Type %X, Count %X\n",
Data->Pathname, Package->RetInfo.Type, ReturnObject->Package.Count));
/*
* For variable-length Packages, we can safely remove all embedded
* and trailing NULL package elements
*/
AcpiNsRemoveNullElements (Data, Package->RetInfo.Type, ReturnObject);
/* Extract package count and elements array */
Elements = ReturnObject->Package.Elements;
Count = ReturnObject->Package.Count;
/* The package must have at least one element, else invalid */
if (!Count)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return Package has no elements (empty)"));
return (AE_AML_OPERAND_VALUE);
}
/*
* Decode the type of the expected package contents
*
* PTYPE1 packages contain no subpackages
* PTYPE2 packages contain sub-packages
*/
switch (Package->RetInfo.Type)
{
case ACPI_PTYPE1_FIXED:
/*
* The package count is fixed and there are no sub-packages
*
* If package is too small, exit.
* If package is larger than expected, issue warning but continue
*/
ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
if (Count < ExpectedCount)
{
goto PackageTooSmall;
}
else if (Count > ExpectedCount)
{
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Return Package is larger than needed - "
"found %u, expected %u\n",
Data->Pathname, Count, ExpectedCount));
}
/* Validate all elements of the returned package */
Status = AcpiNsCheckPackageElements (Data, Elements,
Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
Package->RetInfo.ObjectType2, Package->RetInfo.Count2, 0);
break;
case ACPI_PTYPE1_VAR:
/*
* The package count is variable, there are no sub-packages, and all
* elements must be of the same type
*/
for (i = 0; i < Count; i++)
{
Status = AcpiNsCheckObjectType (Data, Elements,
Package->RetInfo.ObjectType1, i);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Elements++;
}
break;
case ACPI_PTYPE1_OPTION:
/*
* The package count is variable, there are no sub-packages. There are
* a fixed number of required elements, and a variable number of
* optional elements.
*
* Check if package is at least as large as the minimum required
*/
ExpectedCount = Package->RetInfo3.Count;
if (Count < ExpectedCount)
{
goto PackageTooSmall;
}
/* Variable number of sub-objects */
for (i = 0; i < Count; i++)
{
if (i < Package->RetInfo3.Count)
{
/* These are the required package elements (0, 1, or 2) */
Status = AcpiNsCheckObjectType (Data, Elements,
Package->RetInfo3.ObjectType[i], i);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
else
{
/* These are the optional package elements */
Status = AcpiNsCheckObjectType (Data, Elements,
Package->RetInfo3.TailObjectType, i);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
Elements++;
}
break;
case ACPI_PTYPE2_REV_FIXED:
/* First element is the (Integer) revision */
Status = AcpiNsCheckObjectType (Data, Elements,
ACPI_RTYPE_INTEGER, 0);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Elements++;
Count--;
/* Examine the sub-packages */
Status = AcpiNsCheckPackageList (Data, Package, Elements, Count);
break;
case ACPI_PTYPE2_PKG_COUNT:
/* First element is the (Integer) count of sub-packages to follow */
Status = AcpiNsCheckObjectType (Data, Elements,
ACPI_RTYPE_INTEGER, 0);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Count cannot be larger than the parent package length, but allow it
* to be smaller. The >= accounts for the Integer above.
*/
ExpectedCount = (UINT32) (*Elements)->Integer.Value;
if (ExpectedCount >= Count)
{
goto PackageTooSmall;
}
Count = ExpectedCount;
Elements++;
/* Examine the sub-packages */
Status = AcpiNsCheckPackageList (Data, Package, Elements, Count);
break;
case ACPI_PTYPE2:
case ACPI_PTYPE2_FIXED:
case ACPI_PTYPE2_MIN:
case ACPI_PTYPE2_COUNT:
/*
* These types all return a single Package that consists of a
* variable number of sub-Packages.
*
* First, ensure that the first element is a sub-Package. If not,
* the BIOS may have incorrectly returned the object as a single
* package instead of a Package of Packages (a common error if
* there is only one entry). We may be able to repair this by
* wrapping the returned Package with a new outer Package.
*/
if (*Elements && ((*Elements)->Common.Type != ACPI_TYPE_PACKAGE))
{
/* Create the new outer package and populate it */
Status = AcpiNsRepairPackageList (Data, ReturnObjectPtr);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Update locals to point to the new package (of 1 element) */
ReturnObject = *ReturnObjectPtr;
Elements = ReturnObject->Package.Elements;
Count = 1;
}
/* Examine the sub-packages */
Status = AcpiNsCheckPackageList (Data, Package, Elements, Count);
break;
default:
/* Should not get here if predefined info table is correct */
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Invalid internal return type in table entry: %X",
Package->RetInfo.Type));
return (AE_AML_INTERNAL);
}
return (Status);
PackageTooSmall:
/* Error exit for the case with an incorrect package count */
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return Package is too small - found %u elements, expected %u",
Count, ExpectedCount));
return (AE_AML_OPERAND_VALUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckPackageList
*
* PARAMETERS: Data - Pointer to validation data structure
* Package - Pointer to package-specific info for method
* Elements - Element list of parent package. All elements
* of this list should be of type Package.
* Count - Count of subpackages
*
* RETURN: Status
*
* DESCRIPTION: Examine a list of subpackages
*
******************************************************************************/
static ACPI_STATUS
AcpiNsCheckPackageList (
ACPI_PREDEFINED_DATA *Data,
const ACPI_PREDEFINED_INFO *Package,
ACPI_OPERAND_OBJECT **Elements,
UINT32 Count)
{
ACPI_OPERAND_OBJECT *SubPackage;
ACPI_OPERAND_OBJECT **SubElements;
ACPI_STATUS Status;
UINT32 ExpectedCount;
UINT32 i;
UINT32 j;
/*
* Validate each sub-Package in the parent Package
*
* NOTE: assumes list of sub-packages contains no NULL elements.
* Any NULL elements should have been removed by earlier call
* to AcpiNsRemoveNullElements.
*/
for (i = 0; i < Count; i++)
{
SubPackage = *Elements;
SubElements = SubPackage->Package.Elements;
Data->ParentPackage = SubPackage;
/* Each sub-object must be of type Package */
Status = AcpiNsCheckObjectType (Data, &SubPackage,
ACPI_RTYPE_PACKAGE, i);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Examine the different types of expected sub-packages */
Data->ParentPackage = SubPackage;
switch (Package->RetInfo.Type)
{
case ACPI_PTYPE2:
case ACPI_PTYPE2_PKG_COUNT:
case ACPI_PTYPE2_REV_FIXED:
/* Each subpackage has a fixed number of elements */
ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
if (SubPackage->Package.Count < ExpectedCount)
{
goto PackageTooSmall;
}
Status = AcpiNsCheckPackageElements (Data, SubElements,
Package->RetInfo.ObjectType1,
Package->RetInfo.Count1,
Package->RetInfo.ObjectType2,
Package->RetInfo.Count2, 0);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
case ACPI_PTYPE2_FIXED:
/* Each sub-package has a fixed length */
ExpectedCount = Package->RetInfo2.Count;
if (SubPackage->Package.Count < ExpectedCount)
{
goto PackageTooSmall;
}
/* Check the type of each sub-package element */
for (j = 0; j < ExpectedCount; j++)
{
Status = AcpiNsCheckObjectType (Data, &SubElements[j],
Package->RetInfo2.ObjectType[j], j);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
break;
case ACPI_PTYPE2_MIN:
/* Each sub-package has a variable but minimum length */
ExpectedCount = Package->RetInfo.Count1;
if (SubPackage->Package.Count < ExpectedCount)
{
goto PackageTooSmall;
}
/* Check the type of each sub-package element */
Status = AcpiNsCheckPackageElements (Data, SubElements,
Package->RetInfo.ObjectType1,
SubPackage->Package.Count, 0, 0, 0);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
case ACPI_PTYPE2_COUNT:
/*
* First element is the (Integer) count of elements, including
* the count field (the ACPI name is NumElements)
*/
Status = AcpiNsCheckObjectType (Data, SubElements,
ACPI_RTYPE_INTEGER, 0);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Make sure package is large enough for the Count and is
* is as large as the minimum size
*/
ExpectedCount = (UINT32) (*SubElements)->Integer.Value;
if (SubPackage->Package.Count < ExpectedCount)
{
goto PackageTooSmall;
}
if (SubPackage->Package.Count < Package->RetInfo.Count1)
{
ExpectedCount = Package->RetInfo.Count1;
goto PackageTooSmall;
}
if (ExpectedCount == 0)
{
/*
* Either the NumEntries element was originally zero or it was
* a NULL element and repaired to an Integer of value zero.
* In either case, repair it by setting NumEntries to be the
* actual size of the subpackage.
*/
ExpectedCount = SubPackage->Package.Count;
(*SubElements)->Integer.Value = ExpectedCount;
}
/* Check the type of each sub-package element */
Status = AcpiNsCheckPackageElements (Data, (SubElements + 1),
Package->RetInfo.ObjectType1,
(ExpectedCount - 1), 0, 0, 1);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
default: /* Should not get here, type was validated by caller */
return (AE_AML_INTERNAL);
}
Elements++;
}
return (AE_OK);
PackageTooSmall:
/* The sub-package count was smaller than required */
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return Sub-Package[%u] is too small - found %u elements, expected %u",
i, SubPackage->Package.Count, ExpectedCount));
return (AE_AML_OPERAND_VALUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckPackageElements
*
* PARAMETERS: Data - Pointer to validation data structure
* Elements - Pointer to the package elements array
* Type1 - Object type for first group
* Count1 - Count for first group
* Type2 - Object type for second group
* Count2 - Count for second group
* StartIndex - Start of the first group of elements
*
* RETURN: Status
*
* DESCRIPTION: Check that all elements of a package are of the correct object
* type. Supports up to two groups of different object types.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsCheckPackageElements (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **Elements,
UINT8 Type1,
UINT32 Count1,
UINT8 Type2,
UINT32 Count2,
UINT32 StartIndex)
{
ACPI_OPERAND_OBJECT **ThisElement = Elements;
ACPI_STATUS Status;
UINT32 i;
/*
* Up to two groups of package elements are supported by the data
* structure. All elements in each group must be of the same type.
* The second group can have a count of zero.
*/
for (i = 0; i < Count1; i++)
{
Status = AcpiNsCheckObjectType (Data, ThisElement,
Type1, i + StartIndex);
if (ACPI_FAILURE (Status))
{
return (Status);
}
ThisElement++;
}
for (i = 0; i < Count2; i++)
{
Status = AcpiNsCheckObjectType (Data, ThisElement,
Type2, (i + Count1 + StartIndex));
if (ACPI_FAILURE (Status))
{
return (Status);
}
ThisElement++;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckObjectType
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
* ExpectedBtypes - Bitmap of expected return type(s)
* PackageIndex - Index of object within parent package (if
* applicable - ACPI_NOT_PACKAGE_ELEMENT
* otherwise)
*
* RETURN: Status
*
* DESCRIPTION: Check the type of the return object against the expected object
* type(s). Use of Btype allows multiple expected object types.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsCheckObjectType (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr,
UINT32 ExpectedBtypes,
UINT32 PackageIndex)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_STATUS Status = AE_OK;
UINT32 ReturnBtype;
char TypeBuffer[48]; /* Room for 5 types */
/*
* If we get a NULL ReturnObject here, it is a NULL package element.
* Since all extraneous NULL package elements were removed earlier by a
* call to AcpiNsRemoveNullElements, this is an unexpected NULL element.
* We will attempt to repair it.
*/
if (!ReturnObject)
{
Status = AcpiNsRepairNullElement (Data, ExpectedBtypes,
PackageIndex, ReturnObjectPtr);
if (ACPI_SUCCESS (Status))
{
return (AE_OK); /* Repair was successful */
}
goto TypeErrorExit;
}
/* A Namespace node should not get here, but make sure */
if (ACPI_GET_DESCRIPTOR_TYPE (ReturnObject) == ACPI_DESC_TYPE_NAMED)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Invalid return type - Found a Namespace node [%4.4s] type %s",
ReturnObject->Node.Name.Ascii,
AcpiUtGetTypeName (ReturnObject->Node.Type)));
return (AE_AML_OPERAND_TYPE);
}
/*
* Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
* The bitmapped type allows multiple possible return types.
*
* Note, the cases below must handle all of the possible types returned
* from all of the predefined names (including elements of returned
* packages)
*/
switch (ReturnObject->Common.Type)
{
case ACPI_TYPE_INTEGER:
ReturnBtype = ACPI_RTYPE_INTEGER;
break;
case ACPI_TYPE_BUFFER:
ReturnBtype = ACPI_RTYPE_BUFFER;
break;
case ACPI_TYPE_STRING:
ReturnBtype = ACPI_RTYPE_STRING;
break;
case ACPI_TYPE_PACKAGE:
ReturnBtype = ACPI_RTYPE_PACKAGE;
break;
case ACPI_TYPE_LOCAL_REFERENCE:
ReturnBtype = ACPI_RTYPE_REFERENCE;
break;
default:
/* Not one of the supported objects, must be incorrect */
goto TypeErrorExit;
}
/* Is the object one of the expected types? */
if (ReturnBtype & ExpectedBtypes)
{
/* For reference objects, check that the reference type is correct */
if (ReturnObject->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
{
Status = AcpiNsCheckReference (Data, ReturnObject);
}
return (Status);
}
/* Type mismatch -- attempt repair of the returned object */
Status = AcpiNsRepairObject (Data, ExpectedBtypes,
PackageIndex, ReturnObjectPtr);
if (ACPI_SUCCESS (Status))
{
return (AE_OK); /* Repair was successful */
}
TypeErrorExit:
/* Create a string with all expected types for this predefined object */
AcpiNsGetExpectedTypes (TypeBuffer, ExpectedBtypes);
if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return type mismatch - found %s, expected %s",
AcpiUtGetObjectTypeName (ReturnObject), TypeBuffer));
}
else
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return Package type mismatch at index %u - "
"found %s, expected %s", PackageIndex,
AcpiUtGetObjectTypeName (ReturnObject), TypeBuffer));
}
return (AE_AML_OPERAND_TYPE);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsCheckReference
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObject - Object returned from the evaluation of a
* method or object
*
* RETURN: Status
*
* DESCRIPTION: Check a returned reference object for the correct reference
* type. The only reference type that can be returned from a
* predefined method is a named reference. All others are invalid.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsCheckReference (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT *ReturnObject)
{
/*
* Check the reference object for the correct reference type (opcode).
* The only type of reference that can be converted to an ACPI_OBJECT is
* a reference to a named object (reference class: NAME)
*/
if (ReturnObject->Reference.Class == ACPI_REFCLASS_NAME)
{
return (AE_OK);
}
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return type mismatch - unexpected reference object type [%s] %2.2X",
AcpiUtGetReferenceName (ReturnObject),
ReturnObject->Reference.Class));
return (AE_AML_OPERAND_TYPE);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsGetExpectedTypes
*
* PARAMETERS: Buffer - Pointer to where the string is returned
* ExpectedBtypes - Bitmap of expected return type(s)
*
* RETURN: Buffer is populated with type names.
*
* DESCRIPTION: Translate the expected types bitmap into a string of ascii
* names of expected types, for use in warning messages.
*
******************************************************************************/
static void
AcpiNsGetExpectedTypes (
char *Buffer,
UINT32 ExpectedBtypes)
{
UINT32 ThisRtype;
UINT32 i;
UINT32 j;
j = 1;
Buffer[0] = 0;
ThisRtype = ACPI_RTYPE_INTEGER;
for (i = 0; i < ACPI_NUM_RTYPES; i++)
{
/* If one of the expected types, concatenate the name of this type */
if (ExpectedBtypes & ThisRtype)
{
ACPI_STRCAT (Buffer, &AcpiRtypeNames[i][j]);
j = 0; /* Use name separator from now on */
}
ThisRtype <<= 1; /* Next Rtype */
}
}