- 99% of the code is Intel's ACPICA. The license is compliant with BSD and GNU and virtually all systems that use ACPI use this code, For instance it is part of the Linux kernel. - The only minix specific files are acpi.c osminixxf.c platform/acminix.h and include/minix/acpi.h - At the moment the driver does not register interrupt hooks which I believe is mainly for handling PnP, events like "battery level is low" and power management. Should not be difficult to add it if need be. - The interface to the outside world is virtually non-existent except a trivial message based service for PCI driver to query which device is connected to what IRQ line. This will evolve as more components start using this driver. VM, Scheduler and IOMMU are the possible users right now. - because of dependency on a native 64bit (long long, part of c99) it is compiled only with a gnu-like compilers which in case of Minix includes gcc llvm-gcc and clang
918 lines
26 KiB
C
918 lines
26 KiB
C
/******************************************************************************
|
|
*
|
|
* 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;
|
|
}
|
|
|
|
|