diff options
Diffstat (limited to 'sys/contrib/dev/acpica/Subsystem/Dispatcher/dswstate.c')
| -rw-r--r-- | sys/contrib/dev/acpica/Subsystem/Dispatcher/dswstate.c | 1149 |
1 files changed, 0 insertions, 1149 deletions
diff --git a/sys/contrib/dev/acpica/Subsystem/Dispatcher/dswstate.c b/sys/contrib/dev/acpica/Subsystem/Dispatcher/dswstate.c deleted file mode 100644 index dc0b394..0000000 --- a/sys/contrib/dev/acpica/Subsystem/Dispatcher/dswstate.c +++ /dev/null @@ -1,1149 +0,0 @@ -/****************************************************************************** - * - * Module Name: dswstate - Dispatcher parse tree walk management routines - * $Revision: 38 $ - * - *****************************************************************************/ - -/****************************************************************************** - * - * 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. - * - *****************************************************************************/ - - -#define __DSWSTATE_C__ - -#include "acpi.h" -#include "amlcode.h" -#include "acparser.h" -#include "acdispat.h" -#include "acnamesp.h" -#include "acinterp.h" - -#define _COMPONENT DISPATCHER - MODULE_NAME ("dswstate") - - - -/******************************************************************************* - * - * FUNCTION: AcpiDsResultInsert - * - * PARAMETERS: Object - Object to push - * WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: Push an object onto this walk's result stack - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsResultInsert ( - void *Object, - UINT32 Index, - ACPI_WALK_STATE *WalkState) -{ - ACPI_GENERIC_STATE *State; - - - State = WalkState->Results; - if (!State) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultInsert: No result object pushed! State=%p\n", - WalkState)); - return (AE_NOT_EXIST); - } - - if (Index >= OBJ_NUM_OPERANDS) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultInsert: Index out of range: %X Obj=%p State=%p Num=%X\n", - Index, Object, WalkState, State->Results.NumResults)); - return (AE_BAD_PARAMETER); - } - - if (!Object) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultInsert: Null Object! Index=%X Obj=%p State=%p Num=%X\n", - Index, Object, WalkState, State->Results.NumResults)); - return (AE_BAD_PARAMETER); - } - - State->Results.ObjDesc [Index] = Object; - State->Results.NumResults++; - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultStackPush: Obj=%p [%s] State=%p Num=%X Cur=%X\n", - Object, Object ? AcpiCmGetTypeName (((ACPI_OPERAND_OBJECT *) Object)->Common.Type) : "NULL", - WalkState, State->Results.NumResults, WalkState->CurrentResult)); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsResultRemove - * - * PARAMETERS: Object - Where to return the popped object - * WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: Pop an object off the bottom of this walk's result stack. In - * other words, this is a FIFO. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsResultRemove ( - ACPI_OPERAND_OBJECT **Object, - UINT32 Index, - ACPI_WALK_STATE *WalkState) -{ - ACPI_GENERIC_STATE *State; - - - State = WalkState->Results; - if (!State) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultRemove: No result object pushed! State=%p\n", - WalkState)); - return (AE_NOT_EXIST); - } - - if (Index >= OBJ_NUM_OPERANDS) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultRemove: Index out of range: %X State=%p Num=%X\n", - Index, WalkState, State->Results.NumResults)); - } - - - /* Check for a valid result object */ - - if (!State->Results.ObjDesc [Index]) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultStackRemove: Null operand! State=%p #Ops=%X, Index=%X\n", - WalkState, State->Results.NumResults, Index)); - return (AE_AML_NO_RETURN_VALUE); - } - - /* Remove the object */ - - State->Results.NumResults--; - - *Object = State->Results.ObjDesc [Index]; - State->Results.ObjDesc [Index] = NULL; - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultStackRemove: Obj=%p [%s] Index=%X State=%p Num=%X\n", - *Object, (*Object) ? AcpiCmGetTypeName ((*Object)->Common.Type) : "NULL", - Index, WalkState, State->Results.NumResults)); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsResultPop - * - * PARAMETERS: Object - Where to return the popped object - * WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: Pop an object off the bottom of this walk's result stack. In - * other words, this is a FIFO. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsResultPop ( - ACPI_OPERAND_OBJECT **Object, - ACPI_WALK_STATE *WalkState) -{ - UINT32 Index; - ACPI_GENERIC_STATE *State; - - - State = WalkState->Results; - if (!State) - { - return (AE_OK); - } - - - if (!State->Results.NumResults) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPop: Result stack is empty! State=%p\n", - WalkState)); - return (AE_AML_NO_RETURN_VALUE); - } - - /* Remove top element */ - - State->Results.NumResults--; - - for (Index = OBJ_NUM_OPERANDS; Index; Index--) - { - /* Check for a valid result object */ - - if (State->Results.ObjDesc [Index -1]) - { - *Object = State->Results.ObjDesc [Index -1]; - State->Results.ObjDesc [Index -1] = NULL; - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultStackRemove: Obj=%p [%s] Index=%X State=%p Num=%X\n", - *Object, (*Object) ? AcpiCmGetTypeName ((*Object)->Common.Type) : "NULL", - Index -1, WalkState, State->Results.NumResults)); - - return (AE_OK); - } - } - - - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPop: No result objects! State=%p\n", - WalkState)); - return (AE_AML_NO_RETURN_VALUE); -} - -/******************************************************************************* - * - * FUNCTION: AcpiDsResultPopFromBottom - * - * PARAMETERS: Object - Where to return the popped object - * WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: Pop an object off the bottom of this walk's result stack. In - * other words, this is a FIFO. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsResultPopFromBottom ( - ACPI_OPERAND_OBJECT **Object, - ACPI_WALK_STATE *WalkState) -{ - UINT32 Index; - ACPI_GENERIC_STATE *State; - - - State = WalkState->Results; - if (!State) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPopFromBottom: Warning: No result object pushed! State=%p\n", - WalkState)); - return (AE_NOT_EXIST); - } - - - if (!State->Results.NumResults) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPopFromBottom: No result objects! State=%p\n", - WalkState)); - return (AE_AML_NO_RETURN_VALUE); - } - - /* Remove Bottom element */ - - *Object = State->Results.ObjDesc [0]; - - - /* Push entire stack down one element */ - - for (Index = 0; Index < State->Results.NumResults; Index++) - { - State->Results.ObjDesc [Index] = State->Results.ObjDesc [Index + 1]; - } - - State->Results.NumResults--; - - /* Check for a valid result object */ - - if (!*Object) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPopFromBottom: Null operand! State=%p #Ops=%X, Index=%X\n", - WalkState, State->Results.NumResults, Index)); - return (AE_AML_NO_RETURN_VALUE); - } - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultPopFromBottom: Obj=%p [%s], Results=%p State=%p\n", - *Object, (*Object) ? AcpiCmGetTypeName ((*Object)->Common.Type) : "NULL", - State, WalkState)); - - - 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; - - - State = WalkState->Results; - if (!State) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPush: No result stack frame\n")); - return (AE_AML_INTERNAL); - } - - if (State->Results.NumResults == OBJ_NUM_OPERANDS) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPush: Result stack overflow: Obj=%p State=%p Num=%X\n", - Object, WalkState, State->Results.NumResults)); - return (AE_STACK_OVERFLOW); - } - - if (!Object) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsResultPush: Null Object! Obj=%p State=%p Num=%X\n", - Object, WalkState, State->Results.NumResults)); - return (AE_BAD_PARAMETER); - } - - - State->Results.ObjDesc [State->Results.NumResults] = Object; - State->Results.NumResults++; - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultPush: Obj=%p [%s] State=%p Num=%X Cur=%X\n", - Object, Object ? AcpiCmGetTypeName (((ACPI_OPERAND_OBJECT *) Object)->Common.Type) : "NULL", - WalkState, State->Results.NumResults, WalkState->CurrentResult)); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsResultStackPush - * - * PARAMETERS: Object - Object to push - * WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsResultStackPush ( - ACPI_WALK_STATE *WalkState) -{ - ACPI_GENERIC_STATE *State; - - - State = AcpiCmCreateGenericState (); - if (!State) - { - return (AE_NO_MEMORY); - } - - AcpiCmPushGenericState (&WalkState->Results, State); - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultStackPush: Results=%p State=%p\n", - State, WalkState)); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsResultStackPop - * - * PARAMETERS: WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsResultStackPop ( - ACPI_WALK_STATE *WalkState) -{ - ACPI_GENERIC_STATE *State; - - - /* Check for stack underflow */ - - if (WalkState->Results == NULL) - { - DEBUG_PRINT (TRACE_EXEC, - ("DsResultStackPop: Underflow - State=%p\n", - WalkState)); - return (AE_AML_NO_OPERAND); - } - - - State = AcpiCmPopGenericState (&WalkState->Results); - - DEBUG_PRINT (TRACE_EXEC, - ("DsResultStackPop: Result=%p RemainingResults=%X State=%p\n", - State, State->Results.NumResults, WalkState)); - - AcpiCmDeleteGenericState (State); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsObjStackDeleteAll - * - * PARAMETERS: WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: Clear the object stack by deleting all objects that are on it. - * Should be used with great care, if at all! - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsObjStackDeleteAll ( - ACPI_WALK_STATE *WalkState) -{ - UINT32 i; - - - FUNCTION_TRACE_PTR ("DsObjStackDeleteAll", WalkState); - - - /* The stack size is configurable, but fixed */ - - for (i = 0; i < OBJ_NUM_OPERANDS; i++) - { - if (WalkState->Operands[i]) - { - AcpiCmRemoveReference (WalkState->Operands[i]); - WalkState->Operands[i] = NULL; - } - } - - return_ACPI_STATUS (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) -{ - - - /* Check for stack overflow */ - - if (WalkState->NumOperands >= OBJ_NUM_OPERANDS) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsObjStackPush: overflow! Obj=%p State=%p #Ops=%X\n", - Object, WalkState, WalkState->NumOperands)); - return (AE_STACK_OVERFLOW); - } - - /* Put the object onto the stack */ - - WalkState->Operands [WalkState->NumOperands] = Object; - WalkState->NumOperands++; - - DEBUG_PRINT (TRACE_EXEC, ("DsObjStackPush: Obj=%p [%s] State=%p #Ops=%X\n", - Object, AcpiCmGetTypeName (((ACPI_OPERAND_OBJECT *) Object)->Common.Type), - WalkState, WalkState->NumOperands)); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsObjStackPopObject - * - * 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 -AcpiDsObjStackPopObject ( - ACPI_OPERAND_OBJECT **Object, - ACPI_WALK_STATE *WalkState) -{ - - - /* Check for stack underflow */ - - if (WalkState->NumOperands == 0) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsObjStackPop: Missing operand/stack empty! State=%p #Ops=%X\n", - WalkState, WalkState->NumOperands)); - return (AE_AML_NO_OPERAND); - } - - - /* Pop the stack */ - - WalkState->NumOperands--; - - /* Check for a valid operand */ - - if (!WalkState->Operands [WalkState->NumOperands]) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsObjStackPop: Null operand! State=%p #Ops=%X\n", - WalkState, WalkState->NumOperands)); - return (AE_AML_NO_OPERAND); - } - - /* Get operand and set stack entry to null */ - - *Object = WalkState->Operands [WalkState->NumOperands]; - WalkState->Operands [WalkState->NumOperands] = NULL; - - DEBUG_PRINT (TRACE_EXEC, ("DsObjStackPopObject: Obj=%p [%s] State=%p #Ops=%X\n", - *Object, AcpiCmGetTypeName ((*Object)->Common.Type), - 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; - - - for (i = 0; i < PopCount; i++) - { - /* Check for stack underflow */ - - if (WalkState->NumOperands == 0) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsObjStackPop: Underflow! Count=%X State=%p #Ops=%X\n", - PopCount, WalkState, WalkState->NumOperands)); - return (AE_STACK_UNDERFLOW); - } - - /* Just set the stack entry to null */ - - WalkState->NumOperands--; - WalkState->Operands [WalkState->NumOperands] = NULL; - } - - DEBUG_PRINT (TRACE_EXEC, ("DsObjStackPop: 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. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiDsObjStackPopAndDelete ( - UINT32 PopCount, - ACPI_WALK_STATE *WalkState) -{ - UINT32 i; - ACPI_OPERAND_OBJECT *ObjDesc; - - - for (i = 0; i < PopCount; i++) - { - /* Check for stack underflow */ - - if (WalkState->NumOperands == 0) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsObjStackPop: Underflow! Count=%X State=%p #Ops=%X\n", - PopCount, WalkState, WalkState->NumOperands)); - return (AE_STACK_UNDERFLOW); - } - - /* Pop the stack and delete an object if present in this stack entry */ - - WalkState->NumOperands--; - ObjDesc = WalkState->Operands [WalkState->NumOperands]; - if (ObjDesc) - { - AcpiCmRemoveReference (WalkState->Operands [WalkState->NumOperands]); - WalkState->Operands [WalkState->NumOperands] = NULL; - } - } - - DEBUG_PRINT (TRACE_EXEC, ("DsObjStackPop: Count=%X State=%p #Ops=%X\n", - PopCount, WalkState, WalkState->NumOperands)); - - return (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsObjStackGetValue - * - * PARAMETERS: Index - Stack index whose value is desired. Based - * on the top of the stack (index=0 == top) - * WalkState - Current Walk state - * - * RETURN: Status - * - * DESCRIPTION: Retrieve an object from this walk's object stack. Index must - * be within the range of the current stack pointer. - * - ******************************************************************************/ - -void * -AcpiDsObjStackGetValue ( - UINT32 Index, - ACPI_WALK_STATE *WalkState) -{ - - FUNCTION_TRACE_PTR ("DsObjStackGetValue", WalkState); - - - /* Can't do it if the stack is empty */ - - if (WalkState->NumOperands == 0) - { - return_VALUE (NULL); - } - - /* or if the index is past the top of the stack */ - - if (Index > (WalkState->NumOperands - (UINT32) 1)) - { - return_VALUE (NULL); - } - - - return_PTR (WalkState->Operands[(NATIVE_UINT)(WalkState->NumOperands - 1) - - Index]); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsGetCurrentWalkState - * - * PARAMETERS: WalkList - Get current active state for this walk list - * - * 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_WALK_LIST *WalkList) - -{ - - DEBUG_PRINT (TRACE_PARSE, ("DsGetCurrentWalkState, =%p\n", WalkList->WalkState)); - - if (!WalkList) - { - return (NULL); - } - - return (WalkList->WalkState); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsPushWalkState - * - * PARAMETERS: WalkState - State to push - * WalkList - The list that owns the walk stack - * - * RETURN: None - * - * DESCRIPTION: Place the WalkState at the head of the state list. - * - ******************************************************************************/ - -static void -AcpiDsPushWalkState ( - ACPI_WALK_STATE *WalkState, - ACPI_WALK_LIST *WalkList) -{ - - - FUNCTION_TRACE ("DsPushWalkState"); - - - WalkState->Next = WalkList->WalkState; - WalkList->WalkState = WalkState; - - return_VOID; -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsPopWalkState - * - * PARAMETERS: WalkList - The list that owns the walk stack - * - * RETURN: A WalkState object popped from the 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_WALK_LIST *WalkList) -{ - ACPI_WALK_STATE *WalkState; - - - FUNCTION_TRACE ("DsPopWalkState"); - - - WalkState = WalkList->WalkState; - - if (WalkState) - { - /* Next walk state becomes the current walk state */ - - WalkList->WalkState = WalkState->Next; - - /* - * Don't clear the NEXT field, this serves as an indicator - * that there is a parent WALK STATE - * WalkState->Next = NULL; - */ - } - - return_PTR (WalkState); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiDsCreateWalkState - * - * PARAMETERS: Origin - Starting point for this walk - * WalkList - Owning walk list - * - * 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 *MthDesc, - ACPI_WALK_LIST *WalkList) -{ - ACPI_WALK_STATE *WalkState; - ACPI_STATUS Status; - - - FUNCTION_TRACE ("DsCreateWalkState"); - - - AcpiCmAcquireMutex (ACPI_MTX_CACHES); - AcpiGbl_WalkStateCacheRequests++; - - /* Check the cache first */ - - if (AcpiGbl_WalkStateCache) - { - /* There is an object available, use it */ - - WalkState = AcpiGbl_WalkStateCache; - AcpiGbl_WalkStateCache = WalkState->Next; - - AcpiGbl_WalkStateCacheHits++; - AcpiGbl_WalkStateCacheDepth--; - - DEBUG_PRINT (TRACE_EXEC, ("DsCreateWalkState: State %p from cache\n", WalkState)); - - AcpiCmReleaseMutex (ACPI_MTX_CACHES); - } - - else - { - /* The cache is empty, create a new object */ - - /* Avoid deadlock with AcpiCmCallocate */ - - AcpiCmReleaseMutex (ACPI_MTX_CACHES); - - WalkState = AcpiCmCallocate (sizeof (ACPI_WALK_STATE)); - if (!WalkState) - { - return_VALUE (NULL); - } - } - - WalkState->DataType = ACPI_DESC_TYPE_WALK; - WalkState->OwnerId = OwnerId; - WalkState->Origin = Origin; - WalkState->MethodDesc = MthDesc; - - /* Init the method args/local */ - -#ifndef _ACPI_ASL_COMPILER - AcpiDsMethodDataInit (WalkState); -#endif - - /* Create an initial result stack entry */ - - Status = AcpiDsResultStackPush (WalkState); - if (ACPI_FAILURE (Status)) - { - return_VALUE (NULL); - } - - - /* Put the new state at the head of the walk list */ - - AcpiDsPushWalkState (WalkState, WalkList); - - return_PTR (WalkState); -} - - -/******************************************************************************* - * - * 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; - - - FUNCTION_TRACE_PTR ("DsDeleteWalkState", WalkState); - - - if (!WalkState) - { - return; - } - - if (WalkState->DataType != ACPI_DESC_TYPE_WALK) - { - DEBUG_PRINT (ACPI_ERROR, - ("DsDeleteWalkState: **** %p not a valid walk state\n", WalkState)); - return; - } - - - /* Always must free any linked control states */ - - while (WalkState->ControlState) - { - State = WalkState->ControlState; - WalkState->ControlState = State->Common.Next; - - AcpiCmDeleteGenericState (State); - } - - /* Always must free any linked parse states */ - - while (WalkState->ScopeInfo) - { - State = WalkState->ScopeInfo; - WalkState->ScopeInfo = State->Common.Next; - - AcpiCmDeleteGenericState (State); - } - - /* Always must free any stacked result states */ - - while (WalkState->Results) - { - State = WalkState->Results; - WalkState->Results = State->Common.Next; - - AcpiCmDeleteGenericState (State); - } - - - /* If walk cache is full, just free this wallkstate object */ - - if (AcpiGbl_WalkStateCacheDepth >= MAX_WALK_CACHE_DEPTH) - { - AcpiCmFree (WalkState); - } - - /* Otherwise put this object back into the cache */ - - else - { - AcpiCmAcquireMutex (ACPI_MTX_CACHES); - - /* Clear the state */ - - MEMSET (WalkState, 0, sizeof (ACPI_WALK_STATE)); - WalkState->DataType = ACPI_DESC_TYPE_WALK; - - /* Put the object at the head of the global cache list */ - - WalkState->Next = AcpiGbl_WalkStateCache; - AcpiGbl_WalkStateCache = WalkState; - AcpiGbl_WalkStateCacheDepth++; - - - AcpiCmReleaseMutex (ACPI_MTX_CACHES); - } - - return_VOID; -} - - -/****************************************************************************** - * - * FUNCTION: AcpiDsDeleteWalkStateCache - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Purge the global state object cache. Used during subsystem - * termination. - * - ******************************************************************************/ - -void -AcpiDsDeleteWalkStateCache ( - void) -{ - ACPI_WALK_STATE *Next; - - - FUNCTION_TRACE ("DsDeleteWalkStateCache"); - - - /* Traverse the global cache list */ - - while (AcpiGbl_WalkStateCache) - { - /* Delete one cached state object */ - - Next = AcpiGbl_WalkStateCache->Next; - AcpiCmFree (AcpiGbl_WalkStateCache); - AcpiGbl_WalkStateCache = Next; - AcpiGbl_WalkStateCacheDepth--; - } - - return_VOID; -} - - |
