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minix/drivers/acpi/namespace/nspredef.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

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/******************************************************************************
*
* Module Name: nspredef - Validation of ACPI predefined methods and objects
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define ACPI_CREATE_PREDEFINED_TABLE
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#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 */
}
}
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