9560b6dea8
- 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
1009 lines
32 KiB
C
1009 lines
32 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: dsutils - Dispatcher utilities
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
|
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* 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 __DSUTILS_C__
|
|
|
|
#include "acpi.h"
|
|
#include "accommon.h"
|
|
#include "acparser.h"
|
|
#include "amlcode.h"
|
|
#include "acdispat.h"
|
|
#include "acinterp.h"
|
|
#include "acnamesp.h"
|
|
#include "acdebug.h"
|
|
|
|
#define _COMPONENT ACPI_DISPATCHER
|
|
ACPI_MODULE_NAME ("dsutils")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsClearImplicitReturn
|
|
*
|
|
* PARAMETERS: WalkState - Current State
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Clear and remove a reference on an implicit return value. Used
|
|
* to delete "stale" return values (if enabled, the return value
|
|
* from every operator is saved at least momentarily, in case the
|
|
* parent method exits.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsClearImplicitReturn (
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_FUNCTION_NAME (DsClearImplicitReturn);
|
|
|
|
|
|
/*
|
|
* Slack must be enabled for this feature
|
|
*/
|
|
if (!AcpiGbl_EnableInterpreterSlack)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (WalkState->ImplicitReturnObj)
|
|
{
|
|
/*
|
|
* Delete any "stale" implicit return. However, in
|
|
* complex statements, the implicit return value can be
|
|
* bubbled up several levels.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Removing reference on stale implicit return obj %p\n",
|
|
WalkState->ImplicitReturnObj));
|
|
|
|
AcpiUtRemoveReference (WalkState->ImplicitReturnObj);
|
|
WalkState->ImplicitReturnObj = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsDoImplicitReturn
|
|
*
|
|
* PARAMETERS: ReturnDesc - The return value
|
|
* WalkState - Current State
|
|
* AddReference - True if a reference should be added to the
|
|
* return object
|
|
*
|
|
* RETURN: TRUE if implicit return enabled, FALSE otherwise
|
|
*
|
|
* DESCRIPTION: Implements the optional "implicit return". We save the result
|
|
* of every ASL operator and control method invocation in case the
|
|
* parent method exit. Before storing a new return value, we
|
|
* delete the previous return value.
|
|
*
|
|
******************************************************************************/
|
|
|
|
BOOLEAN
|
|
AcpiDsDoImplicitReturn (
|
|
ACPI_OPERAND_OBJECT *ReturnDesc,
|
|
ACPI_WALK_STATE *WalkState,
|
|
BOOLEAN AddReference)
|
|
{
|
|
ACPI_FUNCTION_NAME (DsDoImplicitReturn);
|
|
|
|
|
|
/*
|
|
* Slack must be enabled for this feature, and we must
|
|
* have a valid return object
|
|
*/
|
|
if ((!AcpiGbl_EnableInterpreterSlack) ||
|
|
(!ReturnDesc))
|
|
{
|
|
return (FALSE);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Result %p will be implicitly returned; Prev=%p\n",
|
|
ReturnDesc,
|
|
WalkState->ImplicitReturnObj));
|
|
|
|
/*
|
|
* Delete any "stale" implicit return value first. However, in
|
|
* complex statements, the implicit return value can be
|
|
* bubbled up several levels, so we don't clear the value if it
|
|
* is the same as the ReturnDesc.
|
|
*/
|
|
if (WalkState->ImplicitReturnObj)
|
|
{
|
|
if (WalkState->ImplicitReturnObj == ReturnDesc)
|
|
{
|
|
return (TRUE);
|
|
}
|
|
AcpiDsClearImplicitReturn (WalkState);
|
|
}
|
|
|
|
/* Save the implicit return value, add a reference if requested */
|
|
|
|
WalkState->ImplicitReturnObj = ReturnDesc;
|
|
if (AddReference)
|
|
{
|
|
AcpiUtAddReference (ReturnDesc);
|
|
}
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsIsResultUsed
|
|
*
|
|
* PARAMETERS: Op - Current Op
|
|
* WalkState - Current State
|
|
*
|
|
* RETURN: TRUE if result is used, FALSE otherwise
|
|
*
|
|
* DESCRIPTION: Check if a result object will be used by the parent
|
|
*
|
|
******************************************************************************/
|
|
|
|
BOOLEAN
|
|
AcpiDsIsResultUsed (
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
const ACPI_OPCODE_INFO *ParentInfo;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsIsResultUsed, Op);
|
|
|
|
|
|
/* Must have both an Op and a Result Object */
|
|
|
|
if (!Op)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Null Op"));
|
|
return_UINT8 (TRUE);
|
|
}
|
|
|
|
/*
|
|
* We know that this operator is not a
|
|
* Return() operator (would not come here.) The following code is the
|
|
* optional support for a so-called "implicit return". Some AML code
|
|
* assumes that the last value of the method is "implicitly" returned
|
|
* to the caller. Just save the last result as the return value.
|
|
* NOTE: this is optional because the ASL language does not actually
|
|
* support this behavior.
|
|
*/
|
|
(void) AcpiDsDoImplicitReturn (WalkState->ResultObj, WalkState, TRUE);
|
|
|
|
/*
|
|
* Now determine if the parent will use the result
|
|
*
|
|
* If there is no parent, or the parent is a ScopeOp, we are executing
|
|
* at the method level. An executing method typically has no parent,
|
|
* since each method is parsed separately. A method invoked externally
|
|
* via ExecuteControlMethod has a ScopeOp as the parent.
|
|
*/
|
|
if ((!Op->Common.Parent) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP))
|
|
{
|
|
/* No parent, the return value cannot possibly be used */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"At Method level, result of [%s] not used\n",
|
|
AcpiPsGetOpcodeName (Op->Common.AmlOpcode)));
|
|
return_UINT8 (FALSE);
|
|
}
|
|
|
|
/* Get info on the parent. The RootOp is AML_SCOPE */
|
|
|
|
ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode);
|
|
if (ParentInfo->Class == AML_CLASS_UNKNOWN)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Unknown parent opcode Op=%p", Op));
|
|
return_UINT8 (FALSE);
|
|
}
|
|
|
|
/*
|
|
* Decide what to do with the result based on the parent. If
|
|
* the parent opcode will not use the result, delete the object.
|
|
* Otherwise leave it as is, it will be deleted when it is used
|
|
* as an operand later.
|
|
*/
|
|
switch (ParentInfo->Class)
|
|
{
|
|
case AML_CLASS_CONTROL:
|
|
|
|
switch (Op->Common.Parent->Common.AmlOpcode)
|
|
{
|
|
case AML_RETURN_OP:
|
|
|
|
/* Never delete the return value associated with a return opcode */
|
|
|
|
goto ResultUsed;
|
|
|
|
case AML_IF_OP:
|
|
case AML_WHILE_OP:
|
|
|
|
/*
|
|
* If we are executing the predicate AND this is the predicate op,
|
|
* we will use the return value
|
|
*/
|
|
if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) &&
|
|
(WalkState->ControlState->Control.PredicateOp == Op))
|
|
{
|
|
goto ResultUsed;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* Ignore other control opcodes */
|
|
break;
|
|
}
|
|
|
|
/* The general control opcode returns no result */
|
|
|
|
goto ResultNotUsed;
|
|
|
|
|
|
case AML_CLASS_CREATE:
|
|
|
|
/*
|
|
* These opcodes allow TermArg(s) as operands and therefore
|
|
* the operands can be method calls. The result is used.
|
|
*/
|
|
goto ResultUsed;
|
|
|
|
|
|
case AML_CLASS_NAMED_OBJECT:
|
|
|
|
if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_BANK_FIELD_OP))
|
|
{
|
|
/*
|
|
* These opcodes allow TermArg(s) as operands and therefore
|
|
* the operands can be method calls. The result is used.
|
|
*/
|
|
goto ResultUsed;
|
|
}
|
|
|
|
goto ResultNotUsed;
|
|
|
|
|
|
default:
|
|
|
|
/*
|
|
* In all other cases. the parent will actually use the return
|
|
* object, so keep it.
|
|
*/
|
|
goto ResultUsed;
|
|
}
|
|
|
|
|
|
ResultUsed:
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Result of [%s] used by Parent [%s] Op=%p\n",
|
|
AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
|
|
AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
|
|
|
|
return_UINT8 (TRUE);
|
|
|
|
|
|
ResultNotUsed:
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Result of [%s] not used by Parent [%s] Op=%p\n",
|
|
AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
|
|
AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
|
|
|
|
return_UINT8 (FALSE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsDeleteResultIfNotUsed
|
|
*
|
|
* PARAMETERS: Op - Current parse Op
|
|
* ResultObj - Result of the operation
|
|
* WalkState - Current state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Used after interpretation of an opcode. If there is an internal
|
|
* result descriptor, check if the parent opcode will actually use
|
|
* this result. If not, delete the result now so that it will
|
|
* not become orphaned.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsDeleteResultIfNotUsed (
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_OPERAND_OBJECT *ResultObj,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsDeleteResultIfNotUsed, ResultObj);
|
|
|
|
|
|
if (!Op)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Null Op"));
|
|
return_VOID;
|
|
}
|
|
|
|
if (!ResultObj)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
if (!AcpiDsIsResultUsed (Op, WalkState))
|
|
{
|
|
/* Must pop the result stack (ObjDesc should be equal to ResultObj) */
|
|
|
|
Status = AcpiDsResultPop (&ObjDesc, WalkState);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
AcpiUtRemoveReference (ResultObj);
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsResolveOperands
|
|
*
|
|
* PARAMETERS: WalkState - Current walk state with operands on stack
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Resolve all operands to their values. Used to prepare
|
|
* arguments to a control method invocation (a call from one
|
|
* method to another.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsResolveOperands (
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
UINT32 i;
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsResolveOperands, WalkState);
|
|
|
|
|
|
/*
|
|
* Attempt to resolve each of the valid operands
|
|
* Method arguments are passed by reference, not by value. This means
|
|
* that the actual objects are passed, not copies of the objects.
|
|
*/
|
|
for (i = 0; i < WalkState->NumOperands; i++)
|
|
{
|
|
Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsClearOperands
|
|
*
|
|
* PARAMETERS: WalkState - Current walk state with operands on stack
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Clear all operands on the current walk state operand stack.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsClearOperands (
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsClearOperands, WalkState);
|
|
|
|
|
|
/* Remove a reference on each operand on the stack */
|
|
|
|
for (i = 0; i < WalkState->NumOperands; i++)
|
|
{
|
|
/*
|
|
* Remove a reference to all operands, including both
|
|
* "Arguments" and "Targets".
|
|
*/
|
|
AcpiUtRemoveReference (WalkState->Operands[i]);
|
|
WalkState->Operands[i] = NULL;
|
|
}
|
|
|
|
WalkState->NumOperands = 0;
|
|
return_VOID;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsCreateOperand
|
|
*
|
|
* PARAMETERS: WalkState - Current walk state
|
|
* Arg - Parse object for the argument
|
|
* ArgIndex - Which argument (zero based)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Translate a parse tree object that is an argument to an AML
|
|
* opcode to the equivalent interpreter object. This may include
|
|
* looking up a name or entering a new name into the internal
|
|
* namespace.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsCreateOperand (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *Arg,
|
|
UINT32 ArgIndex)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
char *NameString;
|
|
UINT32 NameLength;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_PARSE_OBJECT *ParentOp;
|
|
UINT16 Opcode;
|
|
ACPI_INTERPRETER_MODE InterpreterMode;
|
|
const ACPI_OPCODE_INFO *OpInfo;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsCreateOperand, Arg);
|
|
|
|
|
|
/* A valid name must be looked up in the namespace */
|
|
|
|
if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
|
|
(Arg->Common.Value.String) &&
|
|
!(Arg->Common.Flags & ACPI_PARSEOP_IN_STACK))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg));
|
|
|
|
/* Get the entire name string from the AML stream */
|
|
|
|
Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer,
|
|
&NameString, &NameLength);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* All prefixes have been handled, and the name is in NameString */
|
|
|
|
/*
|
|
* Special handling for BufferField declarations. This is a deferred
|
|
* opcode that unfortunately defines the field name as the last
|
|
* parameter instead of the first. We get here when we are performing
|
|
* the deferred execution, so the actual name of the field is already
|
|
* in the namespace. We don't want to attempt to look it up again
|
|
* because we may be executing in a different scope than where the
|
|
* actual opcode exists.
|
|
*/
|
|
if ((WalkState->DeferredNode) &&
|
|
(WalkState->DeferredNode->Type == ACPI_TYPE_BUFFER_FIELD) &&
|
|
(ArgIndex == (UINT32) ((WalkState->Opcode == AML_CREATE_FIELD_OP) ? 3 : 2)))
|
|
{
|
|
ObjDesc = ACPI_CAST_PTR (
|
|
ACPI_OPERAND_OBJECT, WalkState->DeferredNode);
|
|
Status = AE_OK;
|
|
}
|
|
else /* All other opcodes */
|
|
{
|
|
/*
|
|
* Differentiate between a namespace "create" operation
|
|
* versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
|
|
* IMODE_EXECUTE) in order to support the creation of
|
|
* namespace objects during the execution of control methods.
|
|
*/
|
|
ParentOp = Arg->Common.Parent;
|
|
OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);
|
|
if ((OpInfo->Flags & AML_NSNODE) &&
|
|
(ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&
|
|
(ParentOp->Common.AmlOpcode != AML_REGION_OP) &&
|
|
(ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
|
|
{
|
|
/* Enter name into namespace if not found */
|
|
|
|
InterpreterMode = ACPI_IMODE_LOAD_PASS2;
|
|
}
|
|
else
|
|
{
|
|
/* Return a failure if name not found */
|
|
|
|
InterpreterMode = ACPI_IMODE_EXECUTE;
|
|
}
|
|
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo, NameString,
|
|
ACPI_TYPE_ANY, InterpreterMode,
|
|
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
|
|
WalkState,
|
|
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc));
|
|
/*
|
|
* The only case where we pass through (ignore) a NOT_FOUND
|
|
* error is for the CondRefOf opcode.
|
|
*/
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP)
|
|
{
|
|
/*
|
|
* For the Conditional Reference op, it's OK if
|
|
* the name is not found; We just need a way to
|
|
* indicate this to the interpreter, set the
|
|
* object to the root
|
|
*/
|
|
ObjDesc = ACPI_CAST_PTR (
|
|
ACPI_OPERAND_OBJECT, AcpiGbl_RootNode);
|
|
Status = AE_OK;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* We just plain didn't find it -- which is a
|
|
* very serious error at this point
|
|
*/
|
|
Status = AE_AML_NAME_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE (NameString, Status);
|
|
}
|
|
}
|
|
|
|
/* Free the namestring created above */
|
|
|
|
ACPI_FREE (NameString);
|
|
|
|
/* Check status from the lookup */
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Put the resulting object onto the current object stack */
|
|
|
|
Status = AcpiDsObjStackPush (ObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
|
|
}
|
|
else
|
|
{
|
|
/* Check for null name case */
|
|
|
|
if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
|
|
!(Arg->Common.Flags & ACPI_PARSEOP_IN_STACK))
|
|
{
|
|
/*
|
|
* If the name is null, this means that this is an
|
|
* optional result parameter that was not specified
|
|
* in the original ASL. Create a Zero Constant for a
|
|
* placeholder. (Store to a constant is a Noop.)
|
|
*/
|
|
Opcode = AML_ZERO_OP; /* Has no arguments! */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Null namepath: Arg=%p\n", Arg));
|
|
}
|
|
else
|
|
{
|
|
Opcode = Arg->Common.AmlOpcode;
|
|
}
|
|
|
|
/* Get the object type of the argument */
|
|
|
|
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
|
|
if (OpInfo->ObjectType == ACPI_TYPE_INVALID)
|
|
{
|
|
return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
if ((OpInfo->Flags & AML_HAS_RETVAL) || (Arg->Common.Flags & ACPI_PARSEOP_IN_STACK))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Argument previously created, already stacked\n"));
|
|
|
|
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (
|
|
WalkState->Operands [WalkState->NumOperands - 1], WalkState));
|
|
|
|
/*
|
|
* Use value that was already previously returned
|
|
* by the evaluation of this argument
|
|
*/
|
|
Status = AcpiDsResultPop (&ObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
/*
|
|
* Only error is underflow, and this indicates
|
|
* a missing or null operand!
|
|
*/
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Missing or null operand"));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Create an ACPI_INTERNAL_OBJECT for the argument */
|
|
|
|
ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType);
|
|
if (!ObjDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Initialize the new object */
|
|
|
|
Status = AcpiDsInitObjectFromOp (
|
|
WalkState, Arg, Opcode, &ObjDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiUtDeleteObjectDesc (ObjDesc);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/* Put the operand object on the object stack */
|
|
|
|
Status = AcpiDsObjStackPush (ObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsCreateOperands
|
|
*
|
|
* PARAMETERS: WalkState - Current state
|
|
* FirstArg - First argument of a parser argument tree
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert an operator's arguments from a parse tree format to
|
|
* namespace objects and place those argument object on the object
|
|
* stack in preparation for evaluation by the interpreter.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsCreateOperands (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *FirstArg)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_PARSE_OBJECT *Arg;
|
|
ACPI_PARSE_OBJECT *Arguments[ACPI_OBJ_NUM_OPERANDS];
|
|
UINT32 ArgCount = 0;
|
|
UINT32 Index = WalkState->NumOperands;
|
|
UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsCreateOperands, FirstArg);
|
|
|
|
|
|
/* Get all arguments in the list */
|
|
|
|
Arg = FirstArg;
|
|
while (Arg)
|
|
{
|
|
if (Index >= ACPI_OBJ_NUM_OPERANDS)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_DATA);
|
|
}
|
|
|
|
Arguments[Index] = Arg;
|
|
WalkState->Operands [Index] = NULL;
|
|
|
|
/* Move on to next argument, if any */
|
|
|
|
Arg = Arg->Common.Next;
|
|
ArgCount++;
|
|
Index++;
|
|
}
|
|
|
|
Index--;
|
|
|
|
/* It is the appropriate order to get objects from the Result stack */
|
|
|
|
for (i = 0; i < ArgCount; i++)
|
|
{
|
|
Arg = Arguments[Index];
|
|
|
|
/* Force the filling of the operand stack in inverse order */
|
|
|
|
WalkState->OperandIndex = (UINT8) Index;
|
|
|
|
Status = AcpiDsCreateOperand (WalkState, Arg, Index);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
Index--;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%u (%p) done, Arg1=%p\n",
|
|
Index, Arg, FirstArg));
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
|
|
|
|
Cleanup:
|
|
/*
|
|
* We must undo everything done above; meaning that we must
|
|
* pop everything off of the operand stack and delete those
|
|
* objects
|
|
*/
|
|
AcpiDsObjStackPopAndDelete (ArgCount, WalkState);
|
|
|
|
ACPI_EXCEPTION ((AE_INFO, Status, "While creating Arg %u", Index));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsEvaluateNamePath
|
|
*
|
|
* PARAMETERS: WalkState - Current state of the parse tree walk,
|
|
* the opcode of current operation should be
|
|
* AML_INT_NAMEPATH_OP
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Translate the -NamePath- parse tree object to the equivalent
|
|
* interpreter object, convert it to value, if needed, duplicate
|
|
* it, if needed, and push it onto the current result stack.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsEvaluateNamePath (
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_PARSE_OBJECT *Op = WalkState->Op;
|
|
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
|
|
ACPI_OPERAND_OBJECT *NewObjDesc;
|
|
UINT8 Type;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsEvaluateNamePath, WalkState);
|
|
|
|
|
|
if (!Op->Common.Parent)
|
|
{
|
|
/* This happens after certain exception processing */
|
|
|
|
goto Exit;
|
|
}
|
|
|
|
if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_REF_OF_OP))
|
|
{
|
|
/* TBD: Should we specify this feature as a bit of OpInfo->Flags of these opcodes? */
|
|
|
|
goto Exit;
|
|
}
|
|
|
|
Status = AcpiDsCreateOperand (WalkState, Op, 0);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
if (Op->Common.Flags & ACPI_PARSEOP_TARGET)
|
|
{
|
|
NewObjDesc = *Operand;
|
|
goto PushResult;
|
|
}
|
|
|
|
Type = (*Operand)->Common.Type;
|
|
|
|
Status = AcpiExResolveToValue (Operand, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
if (Type == ACPI_TYPE_INTEGER)
|
|
{
|
|
/* It was incremented by AcpiExResolveToValue */
|
|
|
|
AcpiUtRemoveReference (*Operand);
|
|
|
|
Status = AcpiUtCopyIobjectToIobject (*Operand, &NewObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* The object either was anew created or is
|
|
* a Namespace node - don't decrement it.
|
|
*/
|
|
NewObjDesc = *Operand;
|
|
}
|
|
|
|
/* Cleanup for name-path operand */
|
|
|
|
Status = AcpiDsObjStackPop (1, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
WalkState->ResultObj = NewObjDesc;
|
|
goto Exit;
|
|
}
|
|
|
|
PushResult:
|
|
|
|
WalkState->ResultObj = NewObjDesc;
|
|
|
|
Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
/* Force to take it from stack */
|
|
|
|
Op->Common.Flags |= ACPI_PARSEOP_IN_STACK;
|
|
}
|
|
|
|
Exit:
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|