freebsd-dev/sys/contrib/dev/acpica/evevent.c

955 lines
30 KiB
C

/******************************************************************************
*
* Module Name: evevent - Fixed and General Purpose AcpiEvent
* handling and dispatch
* $Revision: 46 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 "achware.h"
#include "acevents.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EVENTS
MODULE_NAME ("evevent")
/*******************************************************************************
*
* FUNCTION: AcpiEvInitialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Ensures that the system control interrupt (SCI) is properly
* configured, disables SCI event sources, installs the SCI
* handler
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitialize (
void)
{
ACPI_STATUS Status;
FUNCTION_TRACE ("EvInitialize");
/* Make sure we have ACPI tables */
if (!AcpiGbl_DSDT)
{
DEBUG_PRINTP (ACPI_WARN, ("No ACPI tables present!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Make sure the BIOS supports ACPI mode */
if (SYS_MODE_LEGACY == AcpiHwGetModeCapabilities())
{
DEBUG_PRINTP (ACPI_WARN, ("ACPI Mode is not supported!\n"));
return_ACPI_STATUS (AE_ERROR);
}
AcpiGbl_OriginalMode = AcpiHwGetMode();
/*
* Initialize the Fixed and General Purpose AcpiEvents prior. This is
* done prior to enabling SCIs to prevent interrupts from occuring
* before handers are installed.
*/
Status = AcpiEvFixedEventInitialize ();
if (ACPI_FAILURE (Status))
{
DEBUG_PRINTP (ACPI_FATAL, ("Unable to initialize fixed events.\n"));
return_ACPI_STATUS (Status);
}
Status = AcpiEvGpeInitialize ();
if (ACPI_FAILURE (Status))
{
DEBUG_PRINTP (ACPI_FATAL, ("Unable to initialize general purpose events.\n"));
return_ACPI_STATUS (Status);
}
/* Install the SCI handler */
Status = AcpiEvInstallSciHandler ();
if (ACPI_FAILURE (Status))
{
DEBUG_PRINTP (ACPI_FATAL, ("Unable to install System Control Interrupt Handler\n"));
return_ACPI_STATUS (Status);
}
/* Install handlers for control method GPE handlers (_Lxx, _Exx) */
Status = AcpiEvInitGpeControlMethods ();
if (ACPI_FAILURE (Status))
{
DEBUG_PRINTP (ACPI_FATAL, ("Unable to initialize Gpe control methods\n"));
return_ACPI_STATUS (Status);
}
/* Install the handler for the Global Lock */
Status = AcpiEvInitGlobalLockHandler ();
if (ACPI_FAILURE (Status))
{
DEBUG_PRINTP (ACPI_FATAL, ("Unable to initialize Global Lock handler\n"));
return_ACPI_STATUS (Status);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvFixedEventInitialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize the Fixed AcpiEvent data structures
*
******************************************************************************/
ACPI_STATUS
AcpiEvFixedEventInitialize(void)
{
int i = 0;
/* Initialize the structure that keeps track of fixed event handlers */
for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
{
AcpiGbl_FixedEventHandlers[i].Handler = NULL;
AcpiGbl_FixedEventHandlers[i].Context = NULL;
}
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, TMR_EN, 0);
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, GBL_EN, 0);
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, PWRBTN_EN, 0);
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, SLPBTN_EN, 0);
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, RTC_EN, 0);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvFixedEventDetect
*
* PARAMETERS: None
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Checks the PM status register for fixed events
*
******************************************************************************/
UINT32
AcpiEvFixedEventDetect(void)
{
UINT32 IntStatus = INTERRUPT_NOT_HANDLED;
UINT32 StatusRegister;
UINT32 EnableRegister;
/*
* Read the fixed feature status and enable registers, as all the cases
* depend on their values.
*/
StatusRegister = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, PM1_STS);
EnableRegister = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, PM1_EN);
DEBUG_PRINT (TRACE_INTERRUPTS,
("Fixed AcpiEvent Block: Enable %08X Status %08X\n",
EnableRegister, StatusRegister));
/* power management timer roll over */
if ((StatusRegister & ACPI_STATUS_PMTIMER) &&
(EnableRegister & ACPI_ENABLE_PMTIMER))
{
IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_PMTIMER);
}
/* global event (BIOS wants the global lock) */
if ((StatusRegister & ACPI_STATUS_GLOBAL) &&
(EnableRegister & ACPI_ENABLE_GLOBAL))
{
IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_GLOBAL);
}
/* power button event */
if ((StatusRegister & ACPI_STATUS_POWER_BUTTON) &&
(EnableRegister & ACPI_ENABLE_POWER_BUTTON))
{
IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_POWER_BUTTON);
}
/* sleep button event */
if ((StatusRegister & ACPI_STATUS_SLEEP_BUTTON) &&
(EnableRegister & ACPI_ENABLE_SLEEP_BUTTON))
{
IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_SLEEP_BUTTON);
}
return (IntStatus);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvFixedEventDispatch
*
* PARAMETERS: Event - Event type
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Clears the status bit for the requested event, calls the
* handler that previously registered for the event.
*
******************************************************************************/
UINT32
AcpiEvFixedEventDispatch (
UINT32 Event)
{
UINT32 RegisterId;
/* Clear the status bit */
switch (Event)
{
case ACPI_EVENT_PMTIMER:
RegisterId = TMR_STS;
break;
case ACPI_EVENT_GLOBAL:
RegisterId = GBL_STS;
break;
case ACPI_EVENT_POWER_BUTTON:
RegisterId = PWRBTN_STS;
break;
case ACPI_EVENT_SLEEP_BUTTON:
RegisterId = SLPBTN_STS;
break;
case ACPI_EVENT_RTC:
RegisterId = RTC_STS;
break;
default:
return 0;
break;
}
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK, RegisterId, 1);
/*
* Make sure we've got a handler. If not, report an error.
* The event is disabled to prevent further interrupts.
*/
if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
{
RegisterId = (PM1_EN | REGISTER_BIT_ID(RegisterId));
AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK,
RegisterId, 0);
REPORT_ERROR (
("EvGpeDispatch: No installed handler for fixed event [%08X]\n",
Event));
return (INTERRUPT_NOT_HANDLED);
}
/* Invoke the handler */
return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
AcpiGbl_FixedEventHandlers[Event].Context));
}
/*******************************************************************************
*
* FUNCTION: AcpiEvGpeInitialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize the GPE data structures
*
******************************************************************************/
ACPI_STATUS
AcpiEvGpeInitialize (void)
{
UINT32 i;
UINT32 j;
UINT32 RegisterIndex;
UINT32 GpeNumber;
UINT16 Gpe0RegisterCount;
UINT16 Gpe1RegisterCount;
FUNCTION_TRACE ("EvGpeInitialize");
/*
* Set up various GPE counts
*
* You may ask,why are the GPE register block lengths divided by 2?
* From the ACPI 2.0 Spec, section, 4.7.1.6 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."
*/
Gpe0RegisterCount = (UINT16) DIV_2 (AcpiGbl_FADT->Gpe0BlkLen);
Gpe1RegisterCount = (UINT16) DIV_2 (AcpiGbl_FADT->Gpe1BlkLen);
AcpiGbl_GpeRegisterCount = Gpe0RegisterCount + Gpe1RegisterCount;
if (!AcpiGbl_GpeRegisterCount)
{
REPORT_WARNING (("Zero GPEs are defined in the FADT\n"));
return_ACPI_STATUS (AE_OK);
}
/*
* Allocate the Gpe information block
*/
AcpiGbl_GpeRegisters = ACPI_MEM_CALLOCATE (AcpiGbl_GpeRegisterCount *
sizeof (ACPI_GPE_REGISTERS));
if (!AcpiGbl_GpeRegisters)
{
DEBUG_PRINTP (ACPI_ERROR,
("Could not allocate the GpeRegisters block\n"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Allocate the Gpe dispatch handler block
* There are eight distinct GP events per register.
* Initialization to zeros is sufficient
*/
AcpiGbl_GpeInfo = ACPI_MEM_CALLOCATE (MUL_8 (AcpiGbl_GpeRegisterCount) *
sizeof (ACPI_GPE_LEVEL_INFO));
if (!AcpiGbl_GpeInfo)
{
ACPI_MEM_FREE (AcpiGbl_GpeRegisters);
DEBUG_PRINTP (ACPI_ERROR, ("Could not allocate the GpeInfo block\n"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Set the Gpe validation table to GPE_INVALID */
MEMSET (AcpiGbl_GpeValid, (int) ACPI_GPE_INVALID, ACPI_NUM_GPE);
/*
* Initialize the Gpe information and validation blocks. A goal of these
* blocks is to hide the fact that there are two separate GPE register sets
* In a given block, the status registers occupy the first half, and
* the enable registers occupy the second half.
*/
/* GPE Block 0 */
RegisterIndex = 0;
for (i = 0; i < Gpe0RegisterCount; i++)
{
AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr =
(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) + i);
AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr =
(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) + i + Gpe0RegisterCount);
AcpiGbl_GpeRegisters[RegisterIndex].GpeBase = (UINT8) MUL_8 (i);
for (j = 0; j < 8; j++)
{
GpeNumber = AcpiGbl_GpeRegisters[RegisterIndex].GpeBase + j;
AcpiGbl_GpeValid[GpeNumber] = (UINT8) RegisterIndex;
}
/*
* Clear the status/enable registers. Note that status registers
* are cleared by writing a '1', while enable registers are cleared
* by writing a '0'.
*/
AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 0x00, 8);
AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, 0xFF, 8);
RegisterIndex++;
}
/* GPE Block 1 */
for (i = 0; i < Gpe1RegisterCount; i++)
{
AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr =
(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) + i);
AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr =
(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) + i + Gpe1RegisterCount);
AcpiGbl_GpeRegisters[RegisterIndex].GpeBase =
(UINT8) (AcpiGbl_FADT->Gpe1Base + MUL_8 (i));
for (j = 0; j < 8; j++)
{
GpeNumber = AcpiGbl_GpeRegisters[RegisterIndex].GpeBase + j;
AcpiGbl_GpeValid[GpeNumber] = (UINT8) RegisterIndex;
}
/*
* Clear the status/enable registers. Note that status registers
* are cleared by writing a '1', while enable registers are cleared
* by writing a '0'.
*/
AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 0x00, 8);
AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, 0xFF, 8);
RegisterIndex++;
}
DEBUG_PRINTP (ACPI_INFO, ("GPE registers: %X@%p (Blk0) %X@%p (Blk1)\n",
Gpe0RegisterCount, AcpiGbl_FADT->XGpe0Blk.Address, Gpe1RegisterCount,
AcpiGbl_FADT->XGpe1Blk.Address));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvSaveMethodInfo
*
* PARAMETERS: None
*
* RETURN: None
*
* 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
*
* The name of each GPE control method is of the form:
* "_Lnn" or "_Enn"
* Where:
* L - means that the GPE is level triggered
* E - means that the GPE is edge triggered
* nn - is the GPE number
*
******************************************************************************/
static ACPI_STATUS
AcpiEvSaveMethodInfo (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *ObjDesc,
void **ReturnValue)
{
UINT32 GpeNumber;
NATIVE_CHAR Name[ACPI_NAME_SIZE + 1];
UINT8 Type;
PROC_NAME ("EvSaveMethodInfo");
/* Extract the name from the object and convert to a string */
MOVE_UNALIGNED32_TO_32 (Name, &((ACPI_NAMESPACE_NODE *) ObjHandle)->Name);
Name[ACPI_NAME_SIZE] = 0;
/*
* Edge/Level determination is based on the 2nd INT8 of the method name
*/
if (Name[1] == 'L')
{
Type = ACPI_EVENT_LEVEL_TRIGGERED;
}
else if (Name[1] == 'E')
{
Type = ACPI_EVENT_EDGE_TRIGGERED;
}
else
{
/* Unknown method type, just ignore it! */
DEBUG_PRINTP (ACPI_ERROR,
("Unknown GPE method type: %s (name not of form _Lnn or _Enn)\n",
Name));
return (AE_OK);
}
/* Convert the last two characters of the name to the Gpe Number */
GpeNumber = STRTOUL (&Name[2], NULL, 16);
if (GpeNumber == ACPI_UINT32_MAX)
{
/* Conversion failed; invalid method, just ignore it */
DEBUG_PRINTP (ACPI_ERROR,
("Could not extract GPE number from name: %s (name not of form _Lnn or _Enn)\n",
Name));
return (AE_OK);
}
/* Ensure that we have a valid GPE number */
if (AcpiGbl_GpeValid[GpeNumber] == ACPI_GPE_INVALID)
{
/* Not valid, all we can do here is ignore it */
return (AE_OK);
}
/*
* Now we can add this information to the GpeInfo block
* for use during dispatch of this GPE.
*/
AcpiGbl_GpeInfo [GpeNumber].Type = Type;
AcpiGbl_GpeInfo [GpeNumber].MethodHandle = ObjHandle;
/*
* Enable the GPE (SCIs should be disabled at this point)
*/
AcpiHwEnableGpe (GpeNumber);
DEBUG_PRINTP (ACPI_INFO, ("Registered GPE method %s as GPE number %X\n",
Name, GpeNumber));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInitGpeControlMethods
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Obtain the control methods associated with the GPEs.
*
* NOTE: Must be called AFTER namespace initialization!
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitGpeControlMethods (void)
{
ACPI_STATUS Status;
FUNCTION_TRACE ("EvInitGpeControlMethods");
/* Get a permanent handle to the _GPE object */
Status = AcpiGetHandle (NULL, "\\_GPE", &AcpiGbl_GpeObjHandle);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Traverse the namespace under \_GPE to find all methods there */
Status = AcpiWalkNamespace (ACPI_TYPE_METHOD, AcpiGbl_GpeObjHandle,
ACPI_UINT32_MAX, AcpiEvSaveMethodInfo,
NULL, NULL);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvGpeDetect
*
* PARAMETERS: None
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Detect if any GP events have occurred
*
******************************************************************************/
UINT32
AcpiEvGpeDetect (void)
{
UINT32 IntStatus = INTERRUPT_NOT_HANDLED;
UINT32 i;
UINT32 j;
UINT8 EnabledStatusByte;
UINT8 BitMask;
/*
* Read all of the 8-bit GPE status and enable registers
* in both of the register blocks, saving all of it.
* Find all currently active GP events.
*/
for (i = 0; i < AcpiGbl_GpeRegisterCount; i++)
{
AcpiOsReadPort (AcpiGbl_GpeRegisters[i].StatusAddr,
&AcpiGbl_GpeRegisters[i].Status, 8);
AcpiOsReadPort (AcpiGbl_GpeRegisters[i].EnableAddr,
&AcpiGbl_GpeRegisters[i].Enable, 8);
DEBUG_PRINT (TRACE_INTERRUPTS,
("GPE block at %X - Enable %08X Status %08X\n",
AcpiGbl_GpeRegisters[i].EnableAddr,
AcpiGbl_GpeRegisters[i].Status,
AcpiGbl_GpeRegisters[i].Enable));
/* First check if there is anything active at all in this register */
EnabledStatusByte = (UINT8) (AcpiGbl_GpeRegisters[i].Status &
AcpiGbl_GpeRegisters[i].Enable);
if (!EnabledStatusByte)
{
/* No active GPEs in this register, move on */
continue;
}
/* Now look at the individual GPEs in this byte register */
for (j = 0, BitMask = 1; j < 8; j++, BitMask <<= 1)
{
/* Examine one GPE bit */
if (EnabledStatusByte & BitMask)
{
/*
* Found an active GPE. Dispatch the event to a handler
* or method.
*/
IntStatus |= AcpiEvGpeDispatch (
AcpiGbl_GpeRegisters[i].GpeBase + j);
}
}
}
return (IntStatus);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvAsynchExecuteGpeMethod
*
* PARAMETERS: GpeNumber - The 0-based Gpe number
*
* RETURN: None
*
* DESCRIPTION: Perform the actual execution of a GPE control method. This
* function is called from an invocation of AcpiOsQueueForExecution
* (and therefore does NOT execute at interrupt level) so that
* the control method itself is not executed in the context of
* the SCI interrupt handler.
*
******************************************************************************/
static void
AcpiEvAsynchExecuteGpeMethod (
void *Context)
{
UINT32 GpeNumber = (UINT32) Context;
ACPI_GPE_LEVEL_INFO GpeInfo;
FUNCTION_TRACE ("EvAsynchExecuteGpeMethod");
/*
* Take a snapshot of the GPE info for this level
*/
AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
GpeInfo = AcpiGbl_GpeInfo [GpeNumber];
AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
/*
* Method Handler (_Lxx, _Exx):
* ----------------------------
* Evaluate the _Lxx/_Exx control method that corresponds to this GPE.
*/
if (GpeInfo.MethodHandle)
{
AcpiNsEvaluateByHandle (GpeInfo.MethodHandle, NULL, NULL);
}
/*
* Level-Triggered?
* ----------------
* If level-triggered we clear the GPE status bit after handling the event.
*/
if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED)
{
AcpiHwClearGpe (GpeNumber);
}
/*
* Enable the GPE.
*/
AcpiHwEnableGpe (GpeNumber);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiEvGpeDispatch
*
* PARAMETERS: GpeNumber - The 0-based Gpe number
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Handle and dispatch a General Purpose AcpiEvent.
* Clears the status bit for the requested event.
*
* TBD: [Investigate] is this still valid or necessary:
* The Gpe handler differs from the fixed events in that it clears the enable
* bit rather than the status bit to clear the interrupt. This allows
* software outside of interrupt context to determine what caused the SCI and
* dispatch the correct AML.
*
******************************************************************************/
UINT32
AcpiEvGpeDispatch (
UINT32 GpeNumber)
{
ACPI_GPE_LEVEL_INFO GpeInfo;
FUNCTION_TRACE ("EvGpeDispatch");
/*
* Valid GPE number?
*/
if (AcpiGbl_GpeValid[GpeNumber] == ACPI_GPE_INVALID)
{
DEBUG_PRINTP (ACPI_ERROR, ("Invalid GPE bit [%X].\n", GpeNumber));
return_VALUE (INTERRUPT_NOT_HANDLED);
}
/*
* Disable the GPE.
*/
AcpiHwDisableGpe (GpeNumber);
GpeInfo = AcpiGbl_GpeInfo [GpeNumber];
/*
* Edge-Triggered?
* ---------------
* If edge-triggered, clear the GPE status bit now. Note that
* level-triggered events are cleared after the GPE is serviced.
*/
if (GpeInfo.Type & ACPI_EVENT_EDGE_TRIGGERED)
{
AcpiHwClearGpe (GpeNumber);
}
/*
* Function Handler (e.g. EC)?
*/
if (GpeInfo.Handler)
{
/* Invoke function handler (at interrupt level). */
GpeInfo.Handler (GpeInfo.Context);
/* Level-Triggered? */
if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED)
{
AcpiHwClearGpe (GpeNumber);
}
/* Enable GPE */
AcpiHwEnableGpe (GpeNumber);
}
/*
* Method Handler (e.g. _Exx/_Lxx)?
*/
else if (GpeInfo.MethodHandle)
{
if (ACPI_FAILURE(AcpiOsQueueForExecution (OSD_PRIORITY_GPE,
AcpiEvAsynchExecuteGpeMethod, (void*) GpeNumber)))
{
/*
* Shoudn't occur, but if it does report an error. Note that
* the GPE will remain disabled until the ACPI Core Subsystem
* is restarted, or the handler is removed/reinstalled.
*/
REPORT_ERROR (("AcpiEvGpeDispatch: Unable to queue handler for GPE bit [%X]\n", GpeNumber));
}
}
/*
* No Handler? Report an error and leave the GPE disabled.
*/
else
{
REPORT_ERROR (("AcpiEvGpeDispatch: No installed handler for GPE [%X]\n", GpeNumber));
/* Level-Triggered? */
if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED)
{
AcpiHwClearGpe (GpeNumber);
}
}
return_VALUE (INTERRUPT_HANDLED);
}