0,0 → 1,918 |
/****************************************************************************** |
* |
* Module Name: dswstate - Dispatcher parse tree walk management routines |
* |
*****************************************************************************/ |
|
/****************************************************************************** |
* |
* 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 __DSWSTATE_C__ |
|
#include "acpi.h" |
#include "accommon.h" |
#include "acparser.h" |
#include "acdispat.h" |
#include "acnamesp.h" |
|
#define _COMPONENT ACPI_DISPATCHER |
ACPI_MODULE_NAME ("dswstate") |
|
/* Local prototypes */ |
|
static ACPI_STATUS |
AcpiDsResultStackPush ( |
ACPI_WALK_STATE *WalkState); |
|
static ACPI_STATUS |
AcpiDsResultStackPop ( |
ACPI_WALK_STATE *WalkState); |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsResultPop |
* |
* PARAMETERS: Object - Where to return the popped object |
* WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Pop an object off the top of this walk's result stack |
* |
******************************************************************************/ |
|
ACPI_STATUS |
AcpiDsResultPop ( |
ACPI_OPERAND_OBJECT **Object, |
ACPI_WALK_STATE *WalkState) |
{ |
UINT32 Index; |
ACPI_GENERIC_STATE *State; |
ACPI_STATUS Status; |
|
|
ACPI_FUNCTION_NAME (DsResultPop); |
|
|
State = WalkState->Results; |
|
/* Incorrect state of result stack */ |
|
if (State && !WalkState->ResultCount) |
{ |
ACPI_ERROR ((AE_INFO, "No results on result stack")); |
return (AE_AML_INTERNAL); |
} |
|
if (!State && WalkState->ResultCount) |
{ |
ACPI_ERROR ((AE_INFO, "No result state for result stack")); |
return (AE_AML_INTERNAL); |
} |
|
/* Empty result stack */ |
|
if (!State) |
{ |
ACPI_ERROR ((AE_INFO, "Result stack is empty! State=%p", WalkState)); |
return (AE_AML_NO_RETURN_VALUE); |
} |
|
/* Return object of the top element and clean that top element result stack */ |
|
WalkState->ResultCount--; |
Index = (UINT32) WalkState->ResultCount % ACPI_RESULTS_FRAME_OBJ_NUM; |
|
*Object = State->Results.ObjDesc [Index]; |
if (!*Object) |
{ |
ACPI_ERROR ((AE_INFO, "No result objects on result stack, State=%p", |
WalkState)); |
return (AE_AML_NO_RETURN_VALUE); |
} |
|
State->Results.ObjDesc [Index] = NULL; |
if (Index == 0) |
{ |
Status = AcpiDsResultStackPop (WalkState); |
if (ACPI_FAILURE (Status)) |
{ |
return (Status); |
} |
} |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
"Obj=%p [%s] Index=%X State=%p Num=%X\n", *Object, |
AcpiUtGetObjectTypeName (*Object), |
Index, WalkState, WalkState->ResultCount)); |
|
return (AE_OK); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsResultPush |
* |
* PARAMETERS: Object - Where to return the popped object |
* WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Push an object onto the current result stack |
* |
******************************************************************************/ |
|
ACPI_STATUS |
AcpiDsResultPush ( |
ACPI_OPERAND_OBJECT *Object, |
ACPI_WALK_STATE *WalkState) |
{ |
ACPI_GENERIC_STATE *State; |
ACPI_STATUS Status; |
UINT32 Index; |
|
|
ACPI_FUNCTION_NAME (DsResultPush); |
|
|
if (WalkState->ResultCount > WalkState->ResultSize) |
{ |
ACPI_ERROR ((AE_INFO, "Result stack is full")); |
return (AE_AML_INTERNAL); |
} |
else if (WalkState->ResultCount == WalkState->ResultSize) |
{ |
/* Extend the result stack */ |
|
Status = AcpiDsResultStackPush (WalkState); |
if (ACPI_FAILURE (Status)) |
{ |
ACPI_ERROR ((AE_INFO, "Failed to extend the result stack")); |
return (Status); |
} |
} |
|
if (!(WalkState->ResultCount < WalkState->ResultSize)) |
{ |
ACPI_ERROR ((AE_INFO, "No free elements in result stack")); |
return (AE_AML_INTERNAL); |
} |
|
State = WalkState->Results; |
if (!State) |
{ |
ACPI_ERROR ((AE_INFO, "No result stack frame during push")); |
return (AE_AML_INTERNAL); |
} |
|
if (!Object) |
{ |
ACPI_ERROR ((AE_INFO, |
"Null Object! Obj=%p State=%p Num=%u", |
Object, WalkState, WalkState->ResultCount)); |
return (AE_BAD_PARAMETER); |
} |
|
/* Assign the address of object to the top free element of result stack */ |
|
Index = (UINT32) WalkState->ResultCount % ACPI_RESULTS_FRAME_OBJ_NUM; |
State->Results.ObjDesc [Index] = Object; |
WalkState->ResultCount++; |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n", |
Object, AcpiUtGetObjectTypeName ((ACPI_OPERAND_OBJECT *) Object), |
WalkState, WalkState->ResultCount, WalkState->CurrentResult)); |
|
return (AE_OK); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsResultStackPush |
* |
* PARAMETERS: WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Push an object onto the WalkState result stack |
* |
******************************************************************************/ |
|
static ACPI_STATUS |
AcpiDsResultStackPush ( |
ACPI_WALK_STATE *WalkState) |
{ |
ACPI_GENERIC_STATE *State; |
|
|
ACPI_FUNCTION_NAME (DsResultStackPush); |
|
|
/* Check for stack overflow */ |
|
if (((UINT32) WalkState->ResultSize + ACPI_RESULTS_FRAME_OBJ_NUM) > |
ACPI_RESULTS_OBJ_NUM_MAX) |
{ |
ACPI_ERROR ((AE_INFO, "Result stack overflow: State=%p Num=%u", |
WalkState, WalkState->ResultSize)); |
return (AE_STACK_OVERFLOW); |
} |
|
State = AcpiUtCreateGenericState (); |
if (!State) |
{ |
return (AE_NO_MEMORY); |
} |
|
State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_RESULT; |
AcpiUtPushGenericState (&WalkState->Results, State); |
|
/* Increase the length of the result stack by the length of frame */ |
|
WalkState->ResultSize += ACPI_RESULTS_FRAME_OBJ_NUM; |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n", |
State, WalkState)); |
|
return (AE_OK); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsResultStackPop |
* |
* PARAMETERS: WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Pop an object off of the WalkState result stack |
* |
******************************************************************************/ |
|
static ACPI_STATUS |
AcpiDsResultStackPop ( |
ACPI_WALK_STATE *WalkState) |
{ |
ACPI_GENERIC_STATE *State; |
|
|
ACPI_FUNCTION_NAME (DsResultStackPop); |
|
|
/* Check for stack underflow */ |
|
if (WalkState->Results == NULL) |
{ |
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Result stack underflow - State=%p\n", |
WalkState)); |
return (AE_AML_NO_OPERAND); |
} |
|
if (WalkState->ResultSize < ACPI_RESULTS_FRAME_OBJ_NUM) |
{ |
ACPI_ERROR ((AE_INFO, "Insufficient result stack size")); |
return (AE_AML_INTERNAL); |
} |
|
State = AcpiUtPopGenericState (&WalkState->Results); |
AcpiUtDeleteGenericState (State); |
|
/* Decrease the length of result stack by the length of frame */ |
|
WalkState->ResultSize -= ACPI_RESULTS_FRAME_OBJ_NUM; |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
"Result=%p RemainingResults=%X State=%p\n", |
State, WalkState->ResultCount, WalkState)); |
|
return (AE_OK); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsObjStackPush |
* |
* PARAMETERS: Object - Object to push |
* WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Push an object onto this walk's object/operand stack |
* |
******************************************************************************/ |
|
ACPI_STATUS |
AcpiDsObjStackPush ( |
void *Object, |
ACPI_WALK_STATE *WalkState) |
{ |
ACPI_FUNCTION_NAME (DsObjStackPush); |
|
|
/* Check for stack overflow */ |
|
if (WalkState->NumOperands >= ACPI_OBJ_NUM_OPERANDS) |
{ |
ACPI_ERROR ((AE_INFO, |
"Object stack overflow! Obj=%p State=%p #Ops=%u", |
Object, WalkState, WalkState->NumOperands)); |
return (AE_STACK_OVERFLOW); |
} |
|
/* Put the object onto the stack */ |
|
WalkState->Operands [WalkState->OperandIndex] = Object; |
WalkState->NumOperands++; |
|
/* For the usual order of filling the operand stack */ |
|
WalkState->OperandIndex++; |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n", |
Object, AcpiUtGetObjectTypeName ((ACPI_OPERAND_OBJECT *) Object), |
WalkState, WalkState->NumOperands)); |
|
return (AE_OK); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsObjStackPop |
* |
* PARAMETERS: PopCount - Number of objects/entries to pop |
* WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT |
* deleted by this routine. |
* |
******************************************************************************/ |
|
ACPI_STATUS |
AcpiDsObjStackPop ( |
UINT32 PopCount, |
ACPI_WALK_STATE *WalkState) |
{ |
UINT32 i; |
|
|
ACPI_FUNCTION_NAME (DsObjStackPop); |
|
|
for (i = 0; i < PopCount; i++) |
{ |
/* Check for stack underflow */ |
|
if (WalkState->NumOperands == 0) |
{ |
ACPI_ERROR ((AE_INFO, |
"Object stack underflow! Count=%X State=%p #Ops=%u", |
PopCount, WalkState, WalkState->NumOperands)); |
return (AE_STACK_UNDERFLOW); |
} |
|
/* Just set the stack entry to null */ |
|
WalkState->NumOperands--; |
WalkState->Operands [WalkState->NumOperands] = NULL; |
} |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%u\n", |
PopCount, WalkState, WalkState->NumOperands)); |
|
return (AE_OK); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsObjStackPopAndDelete |
* |
* PARAMETERS: PopCount - Number of objects/entries to pop |
* WalkState - Current Walk state |
* |
* RETURN: Status |
* |
* DESCRIPTION: Pop this walk's object stack and delete each object that is |
* popped off. |
* |
******************************************************************************/ |
|
void |
AcpiDsObjStackPopAndDelete ( |
UINT32 PopCount, |
ACPI_WALK_STATE *WalkState) |
{ |
INT32 i; |
ACPI_OPERAND_OBJECT *ObjDesc; |
|
|
ACPI_FUNCTION_NAME (DsObjStackPopAndDelete); |
|
|
if (PopCount == 0) |
{ |
return; |
} |
|
for (i = (INT32) PopCount - 1; i >= 0; i--) |
{ |
if (WalkState->NumOperands == 0) |
{ |
return; |
} |
|
/* Pop the stack and delete an object if present in this stack entry */ |
|
WalkState->NumOperands--; |
ObjDesc = WalkState->Operands [i]; |
if (ObjDesc) |
{ |
AcpiUtRemoveReference (WalkState->Operands [i]); |
WalkState->Operands [i] = NULL; |
} |
} |
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n", |
PopCount, WalkState, WalkState->NumOperands)); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsGetCurrentWalkState |
* |
* PARAMETERS: Thread - Get current active state for this Thread |
* |
* RETURN: Pointer to the current walk state |
* |
* DESCRIPTION: Get the walk state that is at the head of the list (the "current" |
* walk state.) |
* |
******************************************************************************/ |
|
ACPI_WALK_STATE * |
AcpiDsGetCurrentWalkState ( |
ACPI_THREAD_STATE *Thread) |
{ |
ACPI_FUNCTION_NAME (DsGetCurrentWalkState); |
|
|
if (!Thread) |
{ |
return (NULL); |
} |
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Current WalkState %p\n", |
Thread->WalkStateList)); |
|
return (Thread->WalkStateList); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsPushWalkState |
* |
* PARAMETERS: WalkState - State to push |
* Thread - Thread state object |
* |
* RETURN: None |
* |
* DESCRIPTION: Place the Thread state at the head of the state list |
* |
******************************************************************************/ |
|
void |
AcpiDsPushWalkState ( |
ACPI_WALK_STATE *WalkState, |
ACPI_THREAD_STATE *Thread) |
{ |
ACPI_FUNCTION_TRACE (DsPushWalkState); |
|
|
WalkState->Next = Thread->WalkStateList; |
Thread->WalkStateList = WalkState; |
|
return_VOID; |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsPopWalkState |
* |
* PARAMETERS: Thread - Current thread state |
* |
* RETURN: A WalkState object popped from the thread's stack |
* |
* DESCRIPTION: Remove and return the walkstate object that is at the head of |
* the walk stack for the given walk list. NULL indicates that |
* the list is empty. |
* |
******************************************************************************/ |
|
ACPI_WALK_STATE * |
AcpiDsPopWalkState ( |
ACPI_THREAD_STATE *Thread) |
{ |
ACPI_WALK_STATE *WalkState; |
|
|
ACPI_FUNCTION_TRACE (DsPopWalkState); |
|
|
WalkState = Thread->WalkStateList; |
|
if (WalkState) |
{ |
/* Next walk state becomes the current walk state */ |
|
Thread->WalkStateList = WalkState->Next; |
|
/* |
* Don't clear the NEXT field, this serves as an indicator |
* that there is a parent WALK STATE |
* Do Not: WalkState->Next = NULL; |
*/ |
} |
|
return_PTR (WalkState); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsCreateWalkState |
* |
* PARAMETERS: OwnerId - ID for object creation |
* Origin - Starting point for this walk |
* MethodDesc - Method object |
* Thread - Current thread state |
* |
* RETURN: Pointer to the new walk state. |
* |
* DESCRIPTION: Allocate and initialize a new walk state. The current walk |
* state is set to this new state. |
* |
******************************************************************************/ |
|
ACPI_WALK_STATE * |
AcpiDsCreateWalkState ( |
ACPI_OWNER_ID OwnerId, |
ACPI_PARSE_OBJECT *Origin, |
ACPI_OPERAND_OBJECT *MethodDesc, |
ACPI_THREAD_STATE *Thread) |
{ |
ACPI_WALK_STATE *WalkState; |
|
|
ACPI_FUNCTION_TRACE (DsCreateWalkState); |
|
|
WalkState = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_WALK_STATE)); |
if (!WalkState) |
{ |
return_PTR (NULL); |
} |
|
WalkState->DescriptorType = ACPI_DESC_TYPE_WALK; |
WalkState->MethodDesc = MethodDesc; |
WalkState->OwnerId = OwnerId; |
WalkState->Origin = Origin; |
WalkState->Thread = Thread; |
|
WalkState->ParserState.StartOp = Origin; |
|
/* Init the method args/local */ |
|
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) |
AcpiDsMethodDataInit (WalkState); |
#endif |
|
/* Put the new state at the head of the walk list */ |
|
if (Thread) |
{ |
AcpiDsPushWalkState (WalkState, Thread); |
} |
|
return_PTR (WalkState); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsInitAmlWalk |
* |
* PARAMETERS: WalkState - New state to be initialized |
* Op - Current parse op |
* MethodNode - Control method NS node, if any |
* AmlStart - Start of AML |
* AmlLength - Length of AML |
* Info - Method info block (params, etc.) |
* PassNumber - 1, 2, or 3 |
* |
* RETURN: Status |
* |
* DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk |
* |
******************************************************************************/ |
|
ACPI_STATUS |
AcpiDsInitAmlWalk ( |
ACPI_WALK_STATE *WalkState, |
ACPI_PARSE_OBJECT *Op, |
ACPI_NAMESPACE_NODE *MethodNode, |
UINT8 *AmlStart, |
UINT32 AmlLength, |
ACPI_EVALUATE_INFO *Info, |
UINT8 PassNumber) |
{ |
ACPI_STATUS Status; |
ACPI_PARSE_STATE *ParserState = &WalkState->ParserState; |
ACPI_PARSE_OBJECT *ExtraOp; |
|
|
ACPI_FUNCTION_TRACE (DsInitAmlWalk); |
|
|
WalkState->ParserState.Aml = |
WalkState->ParserState.AmlStart = AmlStart; |
WalkState->ParserState.AmlEnd = |
WalkState->ParserState.PkgEnd = AmlStart + AmlLength; |
|
/* The NextOp of the NextWalk will be the beginning of the method */ |
|
WalkState->NextOp = NULL; |
WalkState->PassNumber = PassNumber; |
|
if (Info) |
{ |
WalkState->Params = Info->Parameters; |
WalkState->CallerReturnDesc = &Info->ReturnObject; |
} |
|
Status = AcpiPsInitScope (&WalkState->ParserState, Op); |
if (ACPI_FAILURE (Status)) |
{ |
return_ACPI_STATUS (Status); |
} |
|
if (MethodNode) |
{ |
WalkState->ParserState.StartNode = MethodNode; |
WalkState->WalkType = ACPI_WALK_METHOD; |
WalkState->MethodNode = MethodNode; |
WalkState->MethodDesc = AcpiNsGetAttachedObject (MethodNode); |
|
/* Push start scope on scope stack and make it current */ |
|
Status = AcpiDsScopeStackPush (MethodNode, ACPI_TYPE_METHOD, WalkState); |
if (ACPI_FAILURE (Status)) |
{ |
return_ACPI_STATUS (Status); |
} |
|
/* Init the method arguments */ |
|
Status = AcpiDsMethodDataInitArgs (WalkState->Params, |
ACPI_METHOD_NUM_ARGS, WalkState); |
if (ACPI_FAILURE (Status)) |
{ |
return_ACPI_STATUS (Status); |
} |
} |
else |
{ |
/* |
* Setup the current scope. |
* Find a Named Op that has a namespace node associated with it. |
* search upwards from this Op. Current scope is the first |
* Op with a namespace node. |
*/ |
ExtraOp = ParserState->StartOp; |
while (ExtraOp && !ExtraOp->Common.Node) |
{ |
ExtraOp = ExtraOp->Common.Parent; |
} |
|
if (!ExtraOp) |
{ |
ParserState->StartNode = NULL; |
} |
else |
{ |
ParserState->StartNode = ExtraOp->Common.Node; |
} |
|
if (ParserState->StartNode) |
{ |
/* Push start scope on scope stack and make it current */ |
|
Status = AcpiDsScopeStackPush (ParserState->StartNode, |
ParserState->StartNode->Type, WalkState); |
if (ACPI_FAILURE (Status)) |
{ |
return_ACPI_STATUS (Status); |
} |
} |
} |
|
Status = AcpiDsInitCallbacks (WalkState, PassNumber); |
return_ACPI_STATUS (Status); |
} |
|
|
/******************************************************************************* |
* |
* FUNCTION: AcpiDsDeleteWalkState |
* |
* PARAMETERS: WalkState - State to delete |
* |
* RETURN: Status |
* |
* DESCRIPTION: Delete a walk state including all internal data structures |
* |
******************************************************************************/ |
|
void |
AcpiDsDeleteWalkState ( |
ACPI_WALK_STATE *WalkState) |
{ |
ACPI_GENERIC_STATE *State; |
|
|
ACPI_FUNCTION_TRACE_PTR (DsDeleteWalkState, WalkState); |
|
|
if (!WalkState) |
{ |
return; |
} |
|
if (WalkState->DescriptorType != ACPI_DESC_TYPE_WALK) |
{ |
ACPI_ERROR ((AE_INFO, "%p is not a valid walk state", |
WalkState)); |
return; |
} |
|
/* There should not be any open scopes */ |
|
if (WalkState->ParserState.Scope) |
{ |
ACPI_ERROR ((AE_INFO, "%p walk still has a scope list", |
WalkState)); |
AcpiPsCleanupScope (&WalkState->ParserState); |
} |
|
/* Always must free any linked control states */ |
|
while (WalkState->ControlState) |
{ |
State = WalkState->ControlState; |
WalkState->ControlState = State->Common.Next; |
|
AcpiUtDeleteGenericState (State); |
} |
|
/* Always must free any linked parse states */ |
|
while (WalkState->ScopeInfo) |
{ |
State = WalkState->ScopeInfo; |
WalkState->ScopeInfo = State->Common.Next; |
|
AcpiUtDeleteGenericState (State); |
} |
|
/* Always must free any stacked result states */ |
|
while (WalkState->Results) |
{ |
State = WalkState->Results; |
WalkState->Results = State->Common.Next; |
|
AcpiUtDeleteGenericState (State); |
} |
|
ACPI_FREE (WalkState); |
return_VOID; |
} |
|
|