486 lines
15 KiB
C
486 lines
15 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nseval - Object evaluation, includes control method execution
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2012, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#define __NSEVAL_C__
|
|
|
|
#include "acpi.h"
|
|
#include "accommon.h"
|
|
#include "acparser.h"
|
|
#include "acinterp.h"
|
|
#include "acnamesp.h"
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME ("nseval")
|
|
|
|
/* Local prototypes */
|
|
|
|
static void
|
|
AcpiNsExecModuleCode (
|
|
ACPI_OPERAND_OBJECT *MethodObj,
|
|
ACPI_EVALUATE_INFO *Info);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsEvaluate
|
|
*
|
|
* PARAMETERS: Info - Evaluation info block, contains:
|
|
* PrefixNode - Prefix or Method/Object Node to execute
|
|
* Pathname - Name of method to execute, If NULL, the
|
|
* Node is the object to execute
|
|
* Parameters - List of parameters to pass to the method,
|
|
* terminated by NULL. Params itself may be
|
|
* NULL if no parameters are being passed.
|
|
* ReturnObject - Where to put method's return value (if
|
|
* any). If NULL, no value is returned.
|
|
* ParameterType - Type of Parameter list
|
|
* ReturnObject - Where to put method's return value (if
|
|
* any). If NULL, no value is returned.
|
|
* Flags - ACPI_IGNORE_RETURN_VALUE to delete return
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Execute a control method or return the current value of an
|
|
* ACPI namespace object.
|
|
*
|
|
* MUTEX: Locks interpreter
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsEvaluate (
|
|
ACPI_EVALUATE_INFO *Info)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsEvaluate);
|
|
|
|
|
|
if (!Info)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Initialize the return value to an invalid object */
|
|
|
|
Info->ReturnObject = NULL;
|
|
Info->ParamCount = 0;
|
|
|
|
/*
|
|
* Get the actual namespace node for the target object. Handles these cases:
|
|
*
|
|
* 1) Null node, Pathname (absolute path)
|
|
* 2) Node, Pathname (path relative to Node)
|
|
* 3) Node, Null Pathname
|
|
*/
|
|
Status = AcpiNsGetNode (Info->PrefixNode, Info->Pathname,
|
|
ACPI_NS_NO_UPSEARCH, &Info->ResolvedNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* For a method alias, we must grab the actual method node so that proper
|
|
* scoping context will be established before execution.
|
|
*/
|
|
if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
|
|
{
|
|
Info->ResolvedNode =
|
|
ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->ResolvedNode->Object);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", Info->Pathname,
|
|
Info->ResolvedNode, AcpiNsGetAttachedObject (Info->ResolvedNode)));
|
|
|
|
Node = Info->ResolvedNode;
|
|
|
|
/*
|
|
* Two major cases here:
|
|
*
|
|
* 1) The object is a control method -- execute it
|
|
* 2) The object is not a method -- just return it's current value
|
|
*/
|
|
if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_METHOD)
|
|
{
|
|
/*
|
|
* 1) Object is a control method - execute it
|
|
*/
|
|
|
|
/* Verify that there is a method object associated with this node */
|
|
|
|
Info->ObjDesc = AcpiNsGetAttachedObject (Info->ResolvedNode);
|
|
if (!Info->ObjDesc)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Control method has no attached sub-object"));
|
|
return_ACPI_STATUS (AE_NULL_OBJECT);
|
|
}
|
|
|
|
/* Count the number of arguments being passed to the method */
|
|
|
|
if (Info->Parameters)
|
|
{
|
|
while (Info->Parameters[Info->ParamCount])
|
|
{
|
|
if (Info->ParamCount > ACPI_METHOD_MAX_ARG)
|
|
{
|
|
return_ACPI_STATUS (AE_LIMIT);
|
|
}
|
|
Info->ParamCount++;
|
|
}
|
|
}
|
|
|
|
ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method",
|
|
ACPI_LV_INFO, _COMPONENT);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"Method at AML address %p Length %X\n",
|
|
Info->ObjDesc->Method.AmlStart + 1,
|
|
Info->ObjDesc->Method.AmlLength - 1));
|
|
|
|
/*
|
|
* Any namespace deletion must acquire both the namespace and
|
|
* interpreter locks to ensure that no thread is using the portion of
|
|
* the namespace that is being deleted.
|
|
*
|
|
* Execute the method via the interpreter. The interpreter is locked
|
|
* here before calling into the AML parser
|
|
*/
|
|
AcpiExEnterInterpreter ();
|
|
Status = AcpiPsExecuteMethod (Info);
|
|
AcpiExExitInterpreter ();
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* 2) Object is not a method, return its current value
|
|
*
|
|
* Disallow certain object types. For these, "evaluation" is undefined.
|
|
*/
|
|
switch (Info->ResolvedNode->Type)
|
|
{
|
|
case ACPI_TYPE_DEVICE:
|
|
case ACPI_TYPE_EVENT:
|
|
case ACPI_TYPE_MUTEX:
|
|
case ACPI_TYPE_REGION:
|
|
case ACPI_TYPE_THERMAL:
|
|
case ACPI_TYPE_LOCAL_SCOPE:
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"[%4.4s] Evaluation of object type [%s] is not supported",
|
|
Info->ResolvedNode->Name.Ascii,
|
|
AcpiUtGetTypeName (Info->ResolvedNode->Type)));
|
|
|
|
return_ACPI_STATUS (AE_TYPE);
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Objects require additional resolution steps (e.g., the Node may be
|
|
* a field that must be read, etc.) -- we can't just grab the object
|
|
* out of the node.
|
|
*
|
|
* Use ResolveNodeToValue() to get the associated value.
|
|
*
|
|
* NOTE: we can get away with passing in NULL for a walk state because
|
|
* ResolvedNode is guaranteed to not be a reference to either a method
|
|
* local or a method argument (because this interface is never called
|
|
* from a running method.)
|
|
*
|
|
* Even though we do not directly invoke the interpreter for object
|
|
* resolution, we must lock it because we could access an opregion.
|
|
* The opregion access code assumes that the interpreter is locked.
|
|
*/
|
|
AcpiExEnterInterpreter ();
|
|
|
|
/* Function has a strange interface */
|
|
|
|
Status = AcpiExResolveNodeToValue (&Info->ResolvedNode, NULL);
|
|
AcpiExExitInterpreter ();
|
|
|
|
/*
|
|
* If AcpiExResolveNodeToValue() succeeded, the return value was placed
|
|
* in ResolvedNode.
|
|
*/
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AE_CTRL_RETURN_VALUE;
|
|
Info->ReturnObject =
|
|
ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->ResolvedNode);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n",
|
|
Info->ReturnObject,
|
|
AcpiUtGetObjectTypeName (Info->ReturnObject)));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check input argument count against the ASL-defined count for a method.
|
|
* Also check predefined names: argument count and return value against
|
|
* the ACPI specification. Some incorrect return value types are repaired.
|
|
*/
|
|
(void) AcpiNsCheckPredefinedNames (Node, Info->ParamCount,
|
|
Status, &Info->ReturnObject);
|
|
|
|
/* Check if there is a return value that must be dealt with */
|
|
|
|
if (Status == AE_CTRL_RETURN_VALUE)
|
|
{
|
|
/* If caller does not want the return value, delete it */
|
|
|
|
if (Info->Flags & ACPI_IGNORE_RETURN_VALUE)
|
|
{
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
Info->ReturnObject = NULL;
|
|
}
|
|
|
|
/* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
|
|
|
|
Status = AE_OK;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"*** Completed evaluation of object %s ***\n", Info->Pathname));
|
|
|
|
/*
|
|
* Namespace was unlocked by the handling AcpiNs* function, so we
|
|
* just return
|
|
*/
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsExecModuleCodeList
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None. Exceptions during method execution are ignored, since
|
|
* we cannot abort a table load.
|
|
*
|
|
* DESCRIPTION: Execute all elements of the global module-level code list.
|
|
* Each element is executed as a single control method.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiNsExecModuleCodeList (
|
|
void)
|
|
{
|
|
ACPI_OPERAND_OBJECT *Prev;
|
|
ACPI_OPERAND_OBJECT *Next;
|
|
ACPI_EVALUATE_INFO *Info;
|
|
UINT32 MethodCount = 0;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsExecModuleCodeList);
|
|
|
|
|
|
/* Exit now if the list is empty */
|
|
|
|
Next = AcpiGbl_ModuleCodeList;
|
|
if (!Next)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Allocate the evaluation information block */
|
|
|
|
Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO));
|
|
if (!Info)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Walk the list, executing each "method" */
|
|
|
|
while (Next)
|
|
{
|
|
Prev = Next;
|
|
Next = Next->Method.Mutex;
|
|
|
|
/* Clear the link field and execute the method */
|
|
|
|
Prev->Method.Mutex = NULL;
|
|
AcpiNsExecModuleCode (Prev, Info);
|
|
MethodCount++;
|
|
|
|
/* Delete the (temporary) method object */
|
|
|
|
AcpiUtRemoveReference (Prev);
|
|
}
|
|
|
|
ACPI_INFO ((AE_INFO,
|
|
"Executed %u blocks of module-level executable AML code",
|
|
MethodCount));
|
|
|
|
ACPI_FREE (Info);
|
|
AcpiGbl_ModuleCodeList = NULL;
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsExecModuleCode
|
|
*
|
|
* PARAMETERS: MethodObj - Object container for the module-level code
|
|
* Info - Info block for method evaluation
|
|
*
|
|
* RETURN: None. Exceptions during method execution are ignored, since
|
|
* we cannot abort a table load.
|
|
*
|
|
* DESCRIPTION: Execute a control method containing a block of module-level
|
|
* executable AML code. The control method is temporarily
|
|
* installed to the root node, then evaluated.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiNsExecModuleCode (
|
|
ACPI_OPERAND_OBJECT *MethodObj,
|
|
ACPI_EVALUATE_INFO *Info)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ParentObj;
|
|
ACPI_NAMESPACE_NODE *ParentNode;
|
|
ACPI_OBJECT_TYPE Type;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsExecModuleCode);
|
|
|
|
|
|
/*
|
|
* Get the parent node. We cheat by using the NextObject field
|
|
* of the method object descriptor.
|
|
*/
|
|
ParentNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
|
|
MethodObj->Method.NextObject);
|
|
Type = AcpiNsGetType (ParentNode);
|
|
|
|
/*
|
|
* Get the region handler and save it in the method object. We may need
|
|
* this if an operation region declaration causes a _REG method to be run.
|
|
*
|
|
* We can't do this in AcpiPsLinkModuleCode because
|
|
* AcpiGbl_RootNode->Object is NULL at PASS1.
|
|
*/
|
|
if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object)
|
|
{
|
|
MethodObj->Method.Dispatch.Handler =
|
|
ParentNode->Object->Device.Handler;
|
|
}
|
|
|
|
/* Must clear NextObject (AcpiNsAttachObject needs the field) */
|
|
|
|
MethodObj->Method.NextObject = NULL;
|
|
|
|
/* Initialize the evaluation information block */
|
|
|
|
ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
|
|
Info->PrefixNode = ParentNode;
|
|
|
|
/*
|
|
* Get the currently attached parent object. Add a reference, because the
|
|
* ref count will be decreased when the method object is installed to
|
|
* the parent node.
|
|
*/
|
|
ParentObj = AcpiNsGetAttachedObject (ParentNode);
|
|
if (ParentObj)
|
|
{
|
|
AcpiUtAddReference (ParentObj);
|
|
}
|
|
|
|
/* Install the method (module-level code) in the parent node */
|
|
|
|
Status = AcpiNsAttachObject (ParentNode, MethodObj,
|
|
ACPI_TYPE_METHOD);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
/* Execute the parent node as a control method */
|
|
|
|
Status = AcpiNsEvaluate (Info);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Executed module-level code at %p\n",
|
|
MethodObj->Method.AmlStart));
|
|
|
|
/* Delete a possible implicit return value (in slack mode) */
|
|
|
|
if (Info->ReturnObject)
|
|
{
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
}
|
|
|
|
/* Detach the temporary method object */
|
|
|
|
AcpiNsDetachObject (ParentNode);
|
|
|
|
/* Restore the original parent object */
|
|
|
|
if (ParentObj)
|
|
{
|
|
Status = AcpiNsAttachObject (ParentNode, ParentObj, Type);
|
|
}
|
|
else
|
|
{
|
|
ParentNode->Type = (UINT8) Type;
|
|
}
|
|
|
|
Exit:
|
|
if (ParentObj)
|
|
{
|
|
AcpiUtRemoveReference (ParentObj);
|
|
}
|
|
return_VOID;
|
|
}
|
|
|