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Diffstat (limited to 'sys/contrib/dev/acpica/dswstate.c')
| -rw-r--r-- | sys/contrib/dev/acpica/dswstate.c | 926 |
1 files changed, 926 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/dswstate.c b/sys/contrib/dev/acpica/dswstate.c new file mode 100644 index 0000000..f6f7bd2 --- /dev/null +++ b/sys/contrib/dev/acpica/dswstate.c @@ -0,0 +1,926 @@ +/****************************************************************************** + * + * Module Name: dswstate - Dispatcher parse tree walk management routines + * $Revision: 1.101 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, 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 <contrib/dev/acpica/acpi.h> +#include <contrib/dev/acpica/acparser.h> +#include <contrib/dev/acpica/acdispat.h> +#include <contrib/dev/acpica/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) +{ + ACPI_NATIVE_UINT 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 = 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), + (UINT32) 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; + ACPI_NATIVE_UINT 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=%X", + Object, WalkState, WalkState->ResultCount)); + return (AE_BAD_PARAMETER); + } + + /* Assign the address of object to the top free element of result stack */ + + Index = 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 ((WalkState->ResultSize + ACPI_RESULTS_FRAME_OBJ_NUM) > + ACPI_RESULTS_OBJ_NUM_MAX) + { + ACPI_ERROR ((AE_INFO, "Result stack overflow: State=%p Num=%X", + 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=%X", + 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=%X", + 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=%X\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) +{ + UINT32 i; + ACPI_OPERAND_OBJECT *ObjDesc; + + + ACPI_FUNCTION_NAME (DsObjStackPopAndDelete); + + + if (PopCount == 0) + { + return; + } + + for (i = (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) + { + if (Info->ParameterType == ACPI_PARAM_GPE) + { + WalkState->GpeEventInfo = + ACPI_CAST_PTR (ACPI_GPE_EVENT_INFO, Info->Parameters); + } + else + { + 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; +} + + |
