532 lines
19 KiB
C
532 lines
19 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evgpeinit - System GPE initialization and update
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2011, 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"
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
ACPI_MODULE_NAME ("evgpeinit")
|
|
|
|
|
|
/*
|
|
* Note: History of _PRW support in ACPICA
|
|
*
|
|
* Originally (2000 - 2010), the GPE initialization code performed a walk of
|
|
* the entire namespace to execute the _PRW methods and detect all GPEs
|
|
* capable of waking the system.
|
|
*
|
|
* As of 10/2010, the _PRW method execution has been removed since it is
|
|
* actually unnecessary. The host OS must in fact execute all _PRW methods
|
|
* in order to identify the device/power-resource dependencies. We now put
|
|
* the onus on the host OS to identify the wake GPEs as part of this process
|
|
* and to inform ACPICA of these GPEs via the AcpiSetupGpeForWake interface. This
|
|
* not only reduces the complexity of the ACPICA initialization code, but in
|
|
* some cases (on systems with very large namespaces) it should reduce the
|
|
* kernel boot time as well.
|
|
*/
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
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;
|
|
|
|
|
|
/*
|
|
* Find any _Lxx/_Exx GPE methods that have just been loaded.
|
|
*
|
|
* Any GPEs that correspond to new _Lxx/_Exx methods 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.OwnerId = TableOwnerId;
|
|
WalkInfo.ExecuteByOwnerId = 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)
|
|
{
|
|
ACPI_INFO ((AE_INFO, "Enabled %u new GPEs", WalkInfo.Count));
|
|
}
|
|
|
|
(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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
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;
|
|
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
|
|
*/
|
|
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 &= ~(ACPI_GPE_DISPATCH_MASK);
|
|
GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_METHOD);
|
|
GpeEventInfo->Dispatch.MethodNode = MethodNode;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
|
|
"Registered GPE method %s as GPE number 0x%.2X\n",
|
|
Name, GpeNumber));
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|