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minix/drivers/acpi/namespace/nsrepair2.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: nsrepair2 - Repair for objects returned by specific
* predefined methods
*
*****************************************************************************/
/******************************************************************************
*
* 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 __NSREPAIR2_C__
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsrepair2")
/*
* Information structure and handler for ACPI predefined names that can
* be repaired on a per-name basis.
*/
typedef
ACPI_STATUS (*ACPI_REPAIR_FUNCTION) (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr);
typedef struct acpi_repair_info
{
char Name[ACPI_NAME_SIZE];
ACPI_REPAIR_FUNCTION RepairFunction;
} ACPI_REPAIR_INFO;
/* Local prototypes */
static const ACPI_REPAIR_INFO *
AcpiNsMatchRepairableName (
ACPI_NAMESPACE_NODE *Node);
static ACPI_STATUS
AcpiNsRepair_ALR (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr);
static ACPI_STATUS
AcpiNsRepair_FDE (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr);
static ACPI_STATUS
AcpiNsRepair_PSS (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr);
static ACPI_STATUS
AcpiNsRepair_TSS (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr);
static ACPI_STATUS
AcpiNsCheckSortedList (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT *ReturnObject,
UINT32 ExpectedCount,
UINT32 SortIndex,
UINT8 SortDirection,
char *SortKeyName);
static void
AcpiNsSortList (
ACPI_OPERAND_OBJECT **Elements,
UINT32 Count,
UINT32 Index,
UINT8 SortDirection);
/* Values for SortDirection above */
#define ACPI_SORT_ASCENDING 0
#define ACPI_SORT_DESCENDING 1
/*
* This table contains the names of the predefined methods for which we can
* perform more complex repairs.
*
* As necessary:
*
* _ALR: Sort the list ascending by AmbientIlluminance
* _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs
* _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs
* _PSS: Sort the list descending by Power
* _TSS: Sort the list descending by Power
*
* Names that must be packages, but cannot be sorted:
*
* _BCL: Values are tied to the Package index where they appear, and cannot
* be moved or sorted. These index values are used for _BQC and _BCM.
* However, we can fix the case where a buffer is returned, by converting
* it to a Package of integers.
*/
static const ACPI_REPAIR_INFO AcpiNsRepairableNames[] =
{
{"_ALR", AcpiNsRepair_ALR},
{"_FDE", AcpiNsRepair_FDE},
{"_GTM", AcpiNsRepair_FDE}, /* _GTM has same repair as _FDE */
{"_PSS", AcpiNsRepair_PSS},
{"_TSS", AcpiNsRepair_TSS},
{{0,0,0,0}, NULL} /* Table terminator */
};
#define ACPI_FDE_FIELD_COUNT 5
#define ACPI_FDE_BYTE_BUFFER_SIZE 5
#define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * sizeof (UINT32))
/******************************************************************************
*
* FUNCTION: AcpiNsComplexRepairs
*
* PARAMETERS: Data - Pointer to validation data structure
* Node - Namespace node for the method/object
* ValidateStatus - Original status of earlier validation
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if repair was successful. If name is not
* matched, ValidateStatus is returned.
*
* DESCRIPTION: Attempt to repair/convert a return object of a type that was
* not expected.
*
*****************************************************************************/
ACPI_STATUS
AcpiNsComplexRepairs (
ACPI_PREDEFINED_DATA *Data,
ACPI_NAMESPACE_NODE *Node,
ACPI_STATUS ValidateStatus,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
const ACPI_REPAIR_INFO *Predefined;
ACPI_STATUS Status;
/* Check if this name is in the list of repairable names */
Predefined = AcpiNsMatchRepairableName (Node);
if (!Predefined)
{
return (ValidateStatus);
}
Status = Predefined->RepairFunction (Data, ReturnObjectPtr);
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiNsMatchRepairableName
*
* PARAMETERS: Node - Namespace node for the method/object
*
* RETURN: Pointer to entry in repair table. NULL indicates not found.
*
* DESCRIPTION: Check an object name against the repairable object list.
*
*****************************************************************************/
static const ACPI_REPAIR_INFO *
AcpiNsMatchRepairableName (
ACPI_NAMESPACE_NODE *Node)
{
const ACPI_REPAIR_INFO *ThisName;
/* Search info table for a repairable predefined method/object name */
ThisName = AcpiNsRepairableNames;
while (ThisName->RepairFunction)
{
if (ACPI_COMPARE_NAME (Node->Name.Ascii, ThisName->Name))
{
return (ThisName);
}
ThisName++;
}
return (NULL); /* Not found */
}
/******************************************************************************
*
* FUNCTION: AcpiNsRepair_ALR
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if object is OK or was repaired successfully
*
* DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list
* ascending by the ambient illuminance values.
*
*****************************************************************************/
static ACPI_STATUS
AcpiNsRepair_ALR (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_STATUS Status;
Status = AcpiNsCheckSortedList (Data, ReturnObject, 2, 1,
ACPI_SORT_ASCENDING, "AmbientIlluminance");
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiNsRepair_FDE
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if object is OK or was repaired successfully
*
* DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return
* value is a Buffer of 5 DWORDs. This function repairs a common
* problem where the return value is a Buffer of BYTEs, not
* DWORDs.
*
*****************************************************************************/
static ACPI_STATUS
AcpiNsRepair_FDE (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_OPERAND_OBJECT *BufferObject;
UINT8 *ByteBuffer;
UINT32 *DwordBuffer;
UINT32 i;
ACPI_FUNCTION_NAME (NsRepair_FDE);
switch (ReturnObject->Common.Type)
{
case ACPI_TYPE_BUFFER:
/* This is the expected type. Length should be (at least) 5 DWORDs */
if (ReturnObject->Buffer.Length >= ACPI_FDE_DWORD_BUFFER_SIZE)
{
return (AE_OK);
}
/* We can only repair if we have exactly 5 BYTEs */
if (ReturnObject->Buffer.Length != ACPI_FDE_BYTE_BUFFER_SIZE)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Incorrect return buffer length %u, expected %u",
ReturnObject->Buffer.Length, ACPI_FDE_DWORD_BUFFER_SIZE));
return (AE_AML_OPERAND_TYPE);
}
/* Create the new (larger) buffer object */
BufferObject = AcpiUtCreateBufferObject (ACPI_FDE_DWORD_BUFFER_SIZE);
if (!BufferObject)
{
return (AE_NO_MEMORY);
}
/* Expand each byte to a DWORD */
ByteBuffer = ReturnObject->Buffer.Pointer;
DwordBuffer = ACPI_CAST_PTR (UINT32, BufferObject->Buffer.Pointer);
for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++)
{
*DwordBuffer = (UINT32) *ByteBuffer;
DwordBuffer++;
ByteBuffer++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s Expanded Byte Buffer to expected DWord Buffer\n",
Data->Pathname));
break;
default:
return (AE_AML_OPERAND_TYPE);
}
/* Delete the original return object, return the new buffer object */
AcpiUtRemoveReference (ReturnObject);
*ReturnObjectPtr = BufferObject;
Data->Flags |= ACPI_OBJECT_REPAIRED;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiNsRepair_TSS
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if object is OK or was repaired successfully
*
* DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list
* descending by the power dissipation values.
*
*****************************************************************************/
static ACPI_STATUS
AcpiNsRepair_TSS (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_STATUS Status;
Status = AcpiNsCheckSortedList (Data, ReturnObject, 5, 1,
ACPI_SORT_DESCENDING, "PowerDissipation");
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiNsRepair_PSS
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if object is OK or was repaired successfully
*
* DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list
* by the CPU frequencies. Check that the power dissipation values
* are all proportional to CPU frequency (i.e., sorting by
* frequency should be the same as sorting by power.)
*
*****************************************************************************/
static ACPI_STATUS
AcpiNsRepair_PSS (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_OPERAND_OBJECT **OuterElements;
UINT32 OuterElementCount;
ACPI_OPERAND_OBJECT **Elements;
ACPI_OPERAND_OBJECT *ObjDesc;
UINT32 PreviousValue;
ACPI_STATUS Status;
UINT32 i;
/*
* Entries (sub-packages) in the _PSS Package must be sorted by power
* dissipation, in descending order. If it appears that the list is
* incorrectly sorted, sort it. We sort by CpuFrequency, since this
* should be proportional to the power.
*/
Status =AcpiNsCheckSortedList (Data, ReturnObject, 6, 0,
ACPI_SORT_DESCENDING, "CpuFrequency");
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* We now know the list is correctly sorted by CPU frequency. Check if
* the power dissipation values are proportional.
*/
PreviousValue = ACPI_UINT32_MAX;
OuterElements = ReturnObject->Package.Elements;
OuterElementCount = ReturnObject->Package.Count;
for (i = 0; i < OuterElementCount; i++)
{
Elements = (*OuterElements)->Package.Elements;
ObjDesc = Elements[1]; /* Index1 = PowerDissipation */
if ((UINT32) ObjDesc->Integer.Value > PreviousValue)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"SubPackage[%u,%u] - suspicious power dissipation values",
i-1, i));
}
PreviousValue = (UINT32) ObjDesc->Integer.Value;
OuterElements++;
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiNsCheckSortedList
*
* PARAMETERS: Data - Pointer to validation data structure
* ReturnObject - Pointer to the top-level returned object
* ExpectedCount - Minimum length of each sub-package
* SortIndex - Sub-package entry to sort on
* SortDirection - Ascending or descending
* SortKeyName - Name of the SortIndex field
*
* RETURN: Status. AE_OK if the list is valid and is sorted correctly or
* has been repaired by sorting the list.
*
* DESCRIPTION: Check if the package list is valid and sorted correctly by the
* SortIndex. If not, then sort the list.
*
*****************************************************************************/
static ACPI_STATUS
AcpiNsCheckSortedList (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT *ReturnObject,
UINT32 ExpectedCount,
UINT32 SortIndex,
UINT8 SortDirection,
char *SortKeyName)
{
UINT32 OuterElementCount;
ACPI_OPERAND_OBJECT **OuterElements;
ACPI_OPERAND_OBJECT **Elements;
ACPI_OPERAND_OBJECT *ObjDesc;
UINT32 i;
UINT32 PreviousValue;
ACPI_FUNCTION_NAME (NsCheckSortedList);
/* The top-level object must be a package */
if (ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
{
return (AE_AML_OPERAND_TYPE);
}
/*
* NOTE: assumes list of sub-packages contains no NULL elements.
* Any NULL elements should have been removed by earlier call
* to AcpiNsRemoveNullElements.
*/
OuterElements = ReturnObject->Package.Elements;
OuterElementCount = ReturnObject->Package.Count;
if (!OuterElementCount)
{
return (AE_AML_PACKAGE_LIMIT);
}
PreviousValue = 0;
if (SortDirection == ACPI_SORT_DESCENDING)
{
PreviousValue = ACPI_UINT32_MAX;
}
/* Examine each subpackage */
for (i = 0; i < OuterElementCount; i++)
{
/* Each element of the top-level package must also be a package */
if ((*OuterElements)->Common.Type != ACPI_TYPE_PACKAGE)
{
return (AE_AML_OPERAND_TYPE);
}
/* Each sub-package must have the minimum length */
if ((*OuterElements)->Package.Count < ExpectedCount)
{
return (AE_AML_PACKAGE_LIMIT);
}
Elements = (*OuterElements)->Package.Elements;
ObjDesc = Elements[SortIndex];
if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
{
return (AE_AML_OPERAND_TYPE);
}
/*
* The list must be sorted in the specified order. If we detect a
* discrepancy, sort the entire list.
*/
if (((SortDirection == ACPI_SORT_ASCENDING) &&
(ObjDesc->Integer.Value < PreviousValue)) ||
((SortDirection == ACPI_SORT_DESCENDING) &&
(ObjDesc->Integer.Value > PreviousValue)))
{
AcpiNsSortList (ReturnObject->Package.Elements,
OuterElementCount, SortIndex, SortDirection);
Data->Flags |= ACPI_OBJECT_REPAIRED;
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Repaired unsorted list - now sorted by %s\n",
Data->Pathname, SortKeyName));
return (AE_OK);
}
PreviousValue = (UINT32) ObjDesc->Integer.Value;
OuterElements++;
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiNsSortList
*
* PARAMETERS: Elements - Package object element list
* Count - Element count for above
* Index - Sort by which package element
* SortDirection - Ascending or Descending sort
*
* RETURN: None
*
* DESCRIPTION: Sort the objects that are in a package element list.
*
* NOTE: Assumes that all NULL elements have been removed from the package,
* and that all elements have been verified to be of type Integer.
*
*****************************************************************************/
static void
AcpiNsSortList (
ACPI_OPERAND_OBJECT **Elements,
UINT32 Count,
UINT32 Index,
UINT8 SortDirection)
{
ACPI_OPERAND_OBJECT *ObjDesc1;
ACPI_OPERAND_OBJECT *ObjDesc2;
ACPI_OPERAND_OBJECT *TempObj;
UINT32 i;
UINT32 j;
/* Simple bubble sort */
for (i = 1; i < Count; i++)
{
for (j = (Count - 1); j >= i; j--)
{
ObjDesc1 = Elements[j-1]->Package.Elements[Index];
ObjDesc2 = Elements[j]->Package.Elements[Index];
if (((SortDirection == ACPI_SORT_ASCENDING) &&
(ObjDesc1->Integer.Value > ObjDesc2->Integer.Value)) ||
((SortDirection == ACPI_SORT_DESCENDING) &&
(ObjDesc1->Integer.Value < ObjDesc2->Integer.Value)))
{
TempObj = Elements[j-1];
Elements[j-1] = Elements[j];
Elements[j] = TempObj;
}
}
}
}
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