/******************************************************************************
*
* Module Name: evgpeinit - System GPE initialization and update
*
*****************************************************************************/
/******************************************************************************
*
* 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.
*
*****************************************************************************/
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evgpeinit")
/*******************************************************************************
*
* FUNCTION: AcpiEvGpeInitialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
*
******************************************************************************/
ACPI_STATUS
AcpiEvGpeInitialize (
void)
{
UINT32 RegisterCount0 = 0;
UINT32 RegisterCount1 = 0;
UINT32 GpeNumberMax = 0;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvGpeInitialize);
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Initialize the GPE Block(s) defined in the FADT
*
* Why the GPE register block lengths are divided by 2: From the ACPI
* Spec, section "General-Purpose Event Registers", we have:
*
* "Each register block contains two registers of equal length
* GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
* GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
* The length of the GPE1_STS and GPE1_EN registers is equal to
* half the GPE1_LEN. If a generic register block is not supported
* then its respective block pointer and block length values in the
* FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
* to be the same size."
*/
/*
* Determine the maximum GPE number for this machine.
*
* Note: both GPE0 and GPE1 are optional, and either can exist without
* the other.
*
* If EITHER the register length OR the block address are zero, then that
* particular block is not supported.
*/
if (AcpiGbl_FADT.Gpe0BlockLength &&
AcpiGbl_FADT.XGpe0Block.Address)
{
/* GPE block 0 exists (has both length and address > 0) */
RegisterCount0 = (UINT16) (AcpiGbl_FADT.Gpe0BlockLength / 2);
GpeNumberMax = (RegisterCount0 * ACPI_GPE_REGISTER_WIDTH) - 1;
/* Install GPE Block 0 */
Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
&AcpiGbl_FADT.XGpe0Block, RegisterCount0, 0,
AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[0]);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not create GPE Block 0"));
}
}
if (AcpiGbl_FADT.Gpe1BlockLength &&
AcpiGbl_FADT.XGpe1Block.Address)
{
/* GPE block 1 exists (has both length and address > 0) */
RegisterCount1 = (UINT16) (AcpiGbl_FADT.Gpe1BlockLength / 2);
/* Check for GPE0/GPE1 overlap (if both banks exist) */
if ((RegisterCount0) &&
(GpeNumberMax >= AcpiGbl_FADT.Gpe1Base))
{
ACPI_ERROR ((AE_INFO,
"GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
"(GPE %u to %u) - Ignoring GPE1",
GpeNumberMax, AcpiGbl_FADT.Gpe1Base,
AcpiGbl_FADT.Gpe1Base +
((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1)));
/* Ignore GPE1 block by setting the register count to zero */
RegisterCount1 = 0;
}
else
{
/* Install GPE Block 1 */
Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
&AcpiGbl_FADT.XGpe1Block, RegisterCount1,
AcpiGbl_FADT.Gpe1Base,
AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[1]);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not create GPE Block 1"));
}
/*
* GPE0 and GPE1 do not have to be contiguous in the GPE number
* space. However, GPE0 always starts at GPE number zero.
*/
GpeNumberMax = AcpiGbl_FADT.Gpe1Base +
((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1);
}
}
/* Exit if there are no GPE registers */
if ((RegisterCount0 + RegisterCount1) == 0)
{
/* GPEs are not required by ACPI, this is OK */
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"There are no GPE blocks defined in the FADT\n"));
Status = AE_OK;
goto Cleanup;
}
/* Check for Max GPE number out-of-range */
if (GpeNumberMax > ACPI_GPE_MAX)
{
ACPI_ERROR ((AE_INFO,
"Maximum GPE number from FADT is too large: 0x%X",
GpeNumberMax));
Status = AE_BAD_VALUE;
goto Cleanup;
}
Cleanup:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvUpdateGpes
*
* PARAMETERS: TableOwnerId - ID of the newly-loaded ACPI table
*
* RETURN: None
*
* DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
* result of a Load() or LoadTable() operation. If new GPE
* methods have been installed, register the new methods and
* enable and runtime GPEs that are associated with them. Also,
* run any newly loaded _PRW methods in order to discover any
* new CAN_WAKE GPEs.
*
******************************************************************************/
void
AcpiEvUpdateGpes (
ACPI_OWNER_ID TableOwnerId)
{
ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_GPE_WALK_INFO WalkInfo;
ACPI_STATUS Status = AE_OK;
UINT32 NewWakeGpeCount = 0;
/* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
WalkInfo.OwnerId = TableOwnerId;
WalkInfo.ExecuteByOwnerId = TRUE;
WalkInfo.Count = 0;
if (AcpiGbl_LeaveWakeGpesDisabled)
{
/*
* 1) Run any newly-loaded _PRW methods to find any GPEs that
* can now be marked as CAN_WAKE GPEs. Note: We must run the
* _PRW methods before we process the _Lxx/_Exx methods because
* we will enable all runtime GPEs associated with the new
* _Lxx/_Exx methods at the time we process those methods.
*
* Unlock interpreter so that we can run the _PRW methods.
*/
WalkInfo.GpeBlock = NULL;
WalkInfo.GpeDevice = NULL;
AcpiExExitInterpreter ();
Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
AcpiEvMatchPrwAndGpe, NULL, &WalkInfo, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While executing _PRW methods"));
}
AcpiExEnterInterpreter ();
NewWakeGpeCount = WalkInfo.Count;
}
/*
* 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
*
* Any GPEs that correspond to new _Lxx/_Exx methods and are not
* marked as CAN_WAKE are immediately enabled.
*
* Examine the namespace underneath each GpeDevice within the
* GpeBlock lists.
*/
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return;
}
WalkInfo.Count = 0;
WalkInfo.EnableThisGpe = TRUE;
/* Walk the interrupt level descriptor list */
GpeXruptInfo = AcpiGbl_GpeXruptListHead;
while (GpeXruptInfo)
{
/* Walk all Gpe Blocks attached to this interrupt level */
GpeBlock = GpeXruptInfo->GpeBlockListHead;
while (GpeBlock)
{
WalkInfo.GpeBlock = GpeBlock;
WalkInfo.GpeDevice = GpeBlock->Node;
Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD,
WalkInfo.GpeDevice, ACPI_UINT32_MAX,
ACPI_NS_WALK_NO_UNLOCK, AcpiEvMatchGpeMethod,
NULL, &WalkInfo, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While decoding _Lxx/_Exx methods"));
}
GpeBlock = GpeBlock->Next;
}
GpeXruptInfo = GpeXruptInfo->Next;
}
if (WalkInfo.Count || NewWakeGpeCount)
{
ACPI_INFO ((AE_INFO,
"Enabled %u new runtime GPEs, added %u new wakeup GPEs",
WalkInfo.Count, NewWakeGpeCount));
}
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiEvMatchGpeMethod
*
* PARAMETERS: Callback from WalkNamespace
*
* RETURN: Status
*
* DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a
* control method under the _GPE portion of the namespace.
* Extract the name and GPE type from the object, saving this
* information for quick lookup during GPE dispatch. Allows a
* per-OwnerId evaluation if ExecuteByOwnerId is TRUE in the
* WalkInfo parameter block.
*
* The name of each GPE control method is of the form:
* "_Lxx" or "_Exx", where:
* L - means that the GPE is level triggered
* E - means that the GPE is edge triggered
* xx - is the GPE number [in HEX]
*
* If WalkInfo->ExecuteByOwnerId is TRUE, we only execute examine GPE methods
* with that owner.
* If WalkInfo->EnableThisGpe is TRUE, the GPE that is referred to by a GPE
* method is immediately enabled (Used for Load/LoadTable operators)
*
******************************************************************************/
ACPI_STATUS
AcpiEvMatchGpeMethod (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_NAMESPACE_NODE *MethodNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
ACPI_GPE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_NAMESPACE_NODE *GpeDevice;
ACPI_STATUS Status;
UINT32 GpeNumber;
char Name[ACPI_NAME_SIZE + 1];
UINT8 Type;
ACPI_FUNCTION_TRACE (EvMatchGpeMethod);
/* Check if requested OwnerId matches this OwnerId */
if ((WalkInfo->ExecuteByOwnerId) &&
(MethodNode->OwnerId != WalkInfo->OwnerId))
{
return_ACPI_STATUS (AE_OK);
}
/*
* Match and decode the _Lxx and _Exx GPE method names
*
* 1) Extract the method name and null terminate it
*/
ACPI_MOVE_32_TO_32 (Name, &MethodNode->Name.Integer);
Name[ACPI_NAME_SIZE] = 0;
/* 2) Name must begin with an underscore */
if (Name[0] != '_')
{
return_ACPI_STATUS (AE_OK); /* Ignore this method */
}
/*
* 3) Edge/Level determination is based on the 2nd character
* of the method name
*
* NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
* found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
*/
switch (Name[1])
{
case 'L':
Type = ACPI_GPE_LEVEL_TRIGGERED;
break;
case 'E':
Type = ACPI_GPE_EDGE_TRIGGERED;
break;
default:
/* Unknown method type, just ignore it */
ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
"Ignoring unknown GPE method type: %s "
"(name not of form _Lxx or _Exx)", Name));
return_ACPI_STATUS (AE_OK);
}
/* 4) The last two characters of the name are the hex GPE Number */
GpeNumber = ACPI_STRTOUL (&Name[2], NULL, 16);
if (GpeNumber == ACPI_UINT32_MAX)
{
/* Conversion failed; invalid method, just ignore it */
ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
"Could not extract GPE number from name: %s "
"(name is not of form _Lxx or _Exx)", Name));
return_ACPI_STATUS (AE_OK);
}
/* Ensure that we have a valid GPE number for this GPE block */
GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, WalkInfo->GpeBlock);
if (!GpeEventInfo)
{
/*
* This GpeNumber is not valid for this GPE block, just ignore it.
* However, it may be valid for a different GPE block, since GPE0
* and GPE1 methods both appear under \_GPE.
*/
return_ACPI_STATUS (AE_OK);
}
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_HANDLER)
{
/* If there is already a handler, ignore this GPE method */
return_ACPI_STATUS (AE_OK);
}
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_METHOD)
{
/*
* If there is already a method, ignore this method. But check
* for a type mismatch (if both the _Lxx AND _Exx exist)
*/
if (Type != (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK))
{
ACPI_ERROR ((AE_INFO,
"For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
GpeNumber, GpeNumber, GpeNumber));
}
return_ACPI_STATUS (AE_OK);
}
/*
* Add the GPE information from above to the GpeEventInfo block for
* use during dispatch of this GPE.
*/
GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_METHOD);
GpeEventInfo->Dispatch.MethodNode = MethodNode;
/*
* Enable this GPE if requested. This only happens when during the
* execution of a Load or LoadTable operator. We have found a new
* GPE method and want to immediately enable the GPE if it is a
* runtime GPE.
*/
if (WalkInfo->EnableThisGpe)
{
/* Ignore GPEs that can wake the system */
if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE) ||
!AcpiGbl_LeaveWakeGpesDisabled)
{
WalkInfo->Count++;
GpeDevice = WalkInfo->GpeDevice;
if (GpeDevice == AcpiGbl_FadtGpeDevice)
{
GpeDevice = NULL;
}
Status = AcpiEnableGpe (GpeDevice, GpeNumber,
ACPI_GPE_TYPE_RUNTIME);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not enable GPE 0x%02X", GpeNumber));
}
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
"Registered GPE method %s as GPE number 0x%.2X\n",
Name, GpeNumber));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvMatchPrwAndGpe
*
* PARAMETERS: Callback from WalkNamespace
*
* RETURN: Status. NOTE: We ignore errors so that the _PRW walk is
* not aborted on a single _PRW failure.
*
* DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a
* Device. Run the _PRW method. If present, extract the GPE
* number and mark the GPE as a CAN_WAKE GPE. Allows a
* per-OwnerId execution if ExecuteByOwnerId is TRUE in the
* WalkInfo parameter block.
*
* If WalkInfo->ExecuteByOwnerId is TRUE, we only execute _PRWs with that
* owner.
* If WalkInfo->GpeDevice is NULL, we execute every _PRW found. Otherwise,
* we only execute _PRWs that refer to the input GpeDevice.
*
******************************************************************************/
ACPI_STATUS
AcpiEvMatchPrwAndGpe (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_GPE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
ACPI_NAMESPACE_NODE *GpeDevice;
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_NAMESPACE_NODE *TargetGpeDevice;
ACPI_NAMESPACE_NODE *PrwNode;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_OPERAND_OBJECT *PkgDesc;
ACPI_OPERAND_OBJECT *ObjDesc;
UINT32 GpeNumber;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvMatchPrwAndGpe);
/* Check for a _PRW method under this device */
Status = AcpiNsGetNode (ObjHandle, METHOD_NAME__PRW,
ACPI_NS_NO_UPSEARCH, &PrwNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (AE_OK);
}
/* Check if requested OwnerId matches this OwnerId */
if ((WalkInfo->ExecuteByOwnerId) &&
(PrwNode->OwnerId != WalkInfo->OwnerId))
{
return_ACPI_STATUS (AE_OK);
}
/* Execute the _PRW */
Status = AcpiUtEvaluateObject (PrwNode, NULL,
ACPI_BTYPE_PACKAGE, &PkgDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (AE_OK);
}
/* The returned _PRW package must have at least two elements */
if (PkgDesc->Package.Count < 2)
{
goto Cleanup;
}
/* Extract pointers from the input context */
GpeDevice = WalkInfo->GpeDevice;
GpeBlock = WalkInfo->GpeBlock;
/*
* The _PRW object must return a package, we are only interested
* in the first element
*/
ObjDesc = PkgDesc->Package.Elements[0];
if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
{
/* Use FADT-defined GPE device (from definition of _PRW) */
TargetGpeDevice = NULL;
if (GpeDevice)
{
TargetGpeDevice = AcpiGbl_FadtGpeDevice;
}
/* Integer is the GPE number in the FADT described GPE blocks */
GpeNumber = (UINT32) ObjDesc->Integer.Value;
}
else if (ObjDesc->Common.Type == ACPI_TYPE_PACKAGE)
{
/* Package contains a GPE reference and GPE number within a GPE block */
if ((ObjDesc->Package.Count < 2) ||
((ObjDesc->Package.Elements[0])->Common.Type !=
ACPI_TYPE_LOCAL_REFERENCE) ||
((ObjDesc->Package.Elements[1])->Common.Type !=
ACPI_TYPE_INTEGER))
{
goto Cleanup;
}
/* Get GPE block reference and decode */
TargetGpeDevice = ObjDesc->Package.Elements[0]->Reference.Node;
GpeNumber = (UINT32) ObjDesc->Package.Elements[1]->Integer.Value;
}
else
{
/* Unknown type, just ignore it */
goto Cleanup;
}
/* Get the GpeEventInfo for this GPE */
if (GpeDevice)
{
/*
* Is this GPE within this block?
*
* TRUE if and only if these conditions are true:
* 1) The GPE devices match.
* 2) The GPE index(number) is within the range of the Gpe Block
* associated with the GPE device.
*/
if (GpeDevice != TargetGpeDevice)
{
goto Cleanup;
}
GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, GpeBlock);
}
else
{
/* GpeDevice is NULL, just match the TargetDevice and GpeNumber */
GpeEventInfo = AcpiEvGetGpeEventInfo (TargetGpeDevice, GpeNumber);
}
if (GpeEventInfo)
{
if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
{
/* This GPE can wake the system */
GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
WalkInfo->Count++;
}
}
Cleanup:
AcpiUtRemoveReference (PkgDesc);
return_ACPI_STATUS (AE_OK);
}