Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/dev/acpi/acpica/Subsystem/dsopcode.c

1117 lines
32 KiB
C
Raw Blame History

/******************************************************************************
*
* Module Name: dsopcode - Dispatcher Op Region support and handling of
* "control" opcodes
* xRevision: 51 $
*
*****************************************************************************/
/******************************************************************************
*
* 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 __DSOPCODE_C__
#include "acpi.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acevents.h"
#include "actables.h"
#define _COMPONENT ACPI_DISPATCHER
MODULE_NAME ("dsopcode")
/*****************************************************************************
*
* FUNCTION: AcpiDsGetBufferFieldArguments
*
* PARAMETERS: ObjDesc - A valid BufferField object
*
* RETURN: Status.
*
* DESCRIPTION: Get BufferField Buffer and Index. This implements the late
* evaluation of these field attributes.
*
****************************************************************************/
ACPI_STATUS
AcpiDsGetBufferFieldArguments (
ACPI_OPERAND_OBJECT *ObjDesc)
{
ACPI_OPERAND_OBJECT *ExtraDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *Op;
ACPI_PARSE_OBJECT *FieldOp;
ACPI_STATUS Status;
ACPI_TABLE_DESC *TableDesc;
FUNCTION_TRACE_PTR ("DsGetBufferFieldArguments", ObjDesc);
if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
{
return_ACPI_STATUS (AE_OK);
}
/* Get the AML pointer (method object) and BufferField node */
ExtraDesc = ObjDesc->BufferField.Extra;
Node = ObjDesc->BufferField.Node;
DEBUG_EXEC(AcpiUtDisplayInitPathname (Node, " [Field]"));
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s] BufferField JIT Init\n",
&Node->Name));
/*
* Allocate a new parser op to be the root of the parsed
* OpRegion tree
*/
Op = AcpiPsAllocOp (AML_SCOPE_OP);
if (!Op)
{
return (AE_NO_MEMORY);
}
/* Save the Node for use in AcpiPsParseAml */
Op->Node = AcpiNsGetParentObject (Node);
/* Get a handle to the parent ACPI table */
Status = AcpiTbHandleToObject (Node->OwnerId, &TableDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Pass1: Parse the entire BufferField declaration */
Status = AcpiPsParseAml (Op, ExtraDesc->Extra.Pcode,
ExtraDesc->Extra.PcodeLength, 0,
NULL, NULL, NULL, AcpiDsLoad1BeginOp, AcpiDsLoad1EndOp);
if (ACPI_FAILURE (Status))
{
AcpiPsDeleteParseTree (Op);
return_ACPI_STATUS (Status);
}
/* Get and init the actual FielUnitOp created above */
FieldOp = Op->Value.Arg;
Op->Node = Node;
FieldOp = Op->Value.Arg;
FieldOp->Node = Node;
AcpiPsDeleteParseTree (Op);
/* AcpiEvaluate the address and length arguments for the OpRegion */
Op = AcpiPsAllocOp (AML_SCOPE_OP);
if (!Op)
{
return (AE_NO_MEMORY);
}
Op->Node = AcpiNsGetParentObject (Node);
Status = AcpiPsParseAml (Op, ExtraDesc->Extra.Pcode,
ExtraDesc->Extra.PcodeLength,
ACPI_PARSE_EXECUTE | ACPI_PARSE_DELETE_TREE,
NULL /*MethodDesc*/, NULL, NULL,
AcpiDsExecBeginOp, AcpiDsExecEndOp);
/* All done with the parse tree, delete it */
AcpiPsDeleteParseTree (Op);
/*
* The pseudo-method object is no longer needed since the region is
* now initialized
*/
AcpiUtRemoveReference (ObjDesc->BufferField.Extra);
ObjDesc->BufferField.Extra = NULL;
return_ACPI_STATUS (Status);
}
/*****************************************************************************
*
* FUNCTION: AcpiDsGetRegionArguments
*
* PARAMETERS: ObjDesc - A valid region object
*
* RETURN: Status.
*
* DESCRIPTION: Get region address and length. This implements the late
* evaluation of these region attributes.
*
****************************************************************************/
ACPI_STATUS
AcpiDsGetRegionArguments (
ACPI_OPERAND_OBJECT *ObjDesc)
{
ACPI_OPERAND_OBJECT *ExtraDesc = NULL;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *Op;
ACPI_PARSE_OBJECT *RegionOp;
ACPI_STATUS Status;
ACPI_TABLE_DESC *TableDesc;
FUNCTION_TRACE_PTR ("DsGetRegionArguments", ObjDesc);
if (ObjDesc->Region.Flags & AOPOBJ_DATA_VALID)
{
return_ACPI_STATUS (AE_OK);
}
/* Get the AML pointer (method object) and region node */
ExtraDesc = ObjDesc->Region.Extra;
Node = ObjDesc->Region.Node;
DEBUG_EXEC(AcpiUtDisplayInitPathname (Node, " [Operation Region]"));
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s] OpRegion Init at AML %p[%x]\n",
&Node->Name, ExtraDesc->Extra.Pcode,
*(UINT32*) ExtraDesc->Extra.Pcode));
/*
* Allocate a new parser op to be the root of the parsed
* OpRegion tree
*/
Op = AcpiPsAllocOp (AML_SCOPE_OP);
if (!Op)
{
return (AE_NO_MEMORY);
}
/* Save the Node for use in AcpiPsParseAml */
Op->Node = AcpiNsGetParentObject (Node);
/* Get a handle to the parent ACPI table */
Status = AcpiTbHandleToObject (Node->OwnerId, &TableDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Parse the entire OpRegion declaration, creating a parse tree */
Status = AcpiPsParseAml (Op, ExtraDesc->Extra.Pcode,
ExtraDesc->Extra.PcodeLength, 0,
NULL, NULL, NULL, AcpiDsLoad1BeginOp, AcpiDsLoad1EndOp);
if (ACPI_FAILURE (Status))
{
AcpiPsDeleteParseTree (Op);
return_ACPI_STATUS (Status);
}
/* Get and init the actual RegionOp created above */
RegionOp = Op->Value.Arg;
Op->Node = Node;
RegionOp = Op->Value.Arg;
RegionOp->Node = Node;
AcpiPsDeleteParseTree (Op);
/* Evaluate the address and length arguments for the OpRegion */
Op = AcpiPsAllocOp (AML_SCOPE_OP);
if (!Op)
{
return (AE_NO_MEMORY);
}
Op->Node = AcpiNsGetParentObject (Node);
Status = AcpiPsParseAml (Op, ExtraDesc->Extra.Pcode,
ExtraDesc->Extra.PcodeLength,
ACPI_PARSE_EXECUTE | ACPI_PARSE_DELETE_TREE,
NULL /*MethodDesc*/, NULL, NULL,
AcpiDsExecBeginOp, AcpiDsExecEndOp);
/* All done with the parse tree, delete it */
AcpiPsDeleteParseTree (Op);
return_ACPI_STATUS (Status);
}
/*****************************************************************************
*
* FUNCTION: AcpiDsInitializeRegion
*
* PARAMETERS: Op - A valid region Op object
*
* RETURN: Status
*
* DESCRIPTION:
*
****************************************************************************/
ACPI_STATUS
AcpiDsInitializeRegion (
ACPI_HANDLE ObjHandle)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ObjDesc = AcpiNsGetAttachedObject (ObjHandle);
/* Namespace is NOT locked */
Status = AcpiEvInitializeRegion (ObjDesc, FALSE);
return (Status);
}
/*****************************************************************************
*
* FUNCTION: AcpiDsEvalBufferFieldOperands
*
* PARAMETERS: Op - A valid BufferField Op object
*
* RETURN: Status
*
* DESCRIPTION: Get BufferField Buffer and Index
* Called from AcpiDsExecEndOp during BufferField parse tree walk
*
* ACPI SPECIFICATION REFERENCES:
* Each of the Buffer Field opcodes is defined as specified in in-line
* comments below. For each one, use the following definitions.
*
* DefBitField := BitFieldOp SrcBuf BitIdx Destination
* DefByteField := ByteFieldOp SrcBuf ByteIdx Destination
* DefCreateField := CreateFieldOp SrcBuf BitIdx NumBits NameString
* DefDWordField := DWordFieldOp SrcBuf ByteIdx Destination
* DefWordField := WordFieldOp SrcBuf ByteIdx Destination
* BitIndex := TermArg=>Integer
* ByteIndex := TermArg=>Integer
* Destination := NameString
* NumBits := TermArg=>Integer
* SourceBuf := TermArg=>Buffer
*
****************************************************************************/
ACPI_STATUS
AcpiDsEvalBufferFieldOperands (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *NextOp;
UINT32 Offset;
UINT32 BitOffset;
UINT32 BitCount;
UINT8 FieldFlags;
ACPI_OPERAND_OBJECT *ResDesc = NULL;
ACPI_OPERAND_OBJECT *CntDesc = NULL;
ACPI_OPERAND_OBJECT *OffDesc = NULL;
ACPI_OPERAND_OBJECT *SrcDesc = NULL;
UINT32 NumOperands = 3;
FUNCTION_TRACE_PTR ("DsEvalBufferFieldOperands", Op);
/*
* This is where we evaluate the address and length fields of the
* CreateXxxField declaration
*/
Node = Op->Node;
/* NextOp points to the op that holds the Buffer */
NextOp = Op->Value.Arg;
/* AcpiEvaluate/create the address and length operands */
Status = AcpiDsCreateOperands (WalkState, NextOp);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Resolve the operands */
Status = AcpiExResolveOperands (Op->Opcode, WALK_OPERANDS, WalkState);
DUMP_OPERANDS (WALK_OPERANDS, IMODE_EXECUTE, AcpiPsGetOpcodeName (Op->Opcode),
NumOperands, "after AcpiExResolveOperands");
/* Get the operands */
Status |= AcpiDsObjStackPopObject (&ResDesc, WalkState);
if (AML_CREATE_FIELD_OP == Op->Opcode)
{
NumOperands = 4;
Status |= AcpiDsObjStackPopObject (&CntDesc, WalkState);
}
Status |= AcpiDsObjStackPopObject (&OffDesc, WalkState);
Status |= AcpiDsObjStackPopObject (&SrcDesc, WalkState);
if (ACPI_FAILURE (Status))
{
/* Invalid parameters on object stack */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "(%s) bad operand(s) (%X)\n",
AcpiPsGetOpcodeName (Op->Opcode), Status));
goto Cleanup;
}
Offset = (UINT32) OffDesc->Integer.Value;
/*
* If ResDesc is a Name, it will be a direct name pointer after
* AcpiExResolveOperands()
*/
if (!VALID_DESCRIPTOR_TYPE (ResDesc, ACPI_DESC_TYPE_NAMED))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "(%s) destination must be a Node\n",
AcpiPsGetOpcodeName (Op->Opcode)));
Status = AE_AML_OPERAND_TYPE;
goto Cleanup;
}
/*
* Setup the Bit offsets and counts, according to the opcode
*/
switch (Op->Opcode)
{
/* DefCreateField */
case AML_CREATE_FIELD_OP:
/* Offset is in bits, count is in bits */
BitOffset = Offset;
BitCount = (UINT32) CntDesc->Integer.Value;
FieldFlags = ACCESS_BYTE_ACC;
break;
/* DefCreateBitField */
case AML_CREATE_BIT_FIELD_OP:
/* Offset is in bits, Field is one bit */
BitOffset = Offset;
BitCount = 1;
FieldFlags = ACCESS_BYTE_ACC;
break;
/* DefCreateByteField */
case AML_CREATE_BYTE_FIELD_OP:
/* Offset is in bytes, field is one byte */
BitOffset = 8 * Offset;
BitCount = 8;
FieldFlags = ACCESS_BYTE_ACC;
break;
/* DefCreateWordField */
case AML_CREATE_WORD_FIELD_OP:
/* Offset is in bytes, field is one word */
BitOffset = 8 * Offset;
BitCount = 16;
FieldFlags = ACCESS_WORD_ACC;
break;
/* DefCreateDWordField */
case AML_CREATE_DWORD_FIELD_OP:
/* Offset is in bytes, field is one dword */
BitOffset = 8 * Offset;
BitCount = 32;
FieldFlags = ACCESS_DWORD_ACC;
break;
/* DefCreateQWordField */
case AML_CREATE_QWORD_FIELD_OP:
/* Offset is in bytes, field is one qword */
BitOffset = 8 * Offset;
BitCount = 64;
FieldFlags = ACCESS_QWORD_ACC;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Internal error - unknown field creation opcode %02x\n",
Op->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
/*
* Setup field according to the object type
*/
switch (SrcDesc->Common.Type)
{
/* SourceBuff := TermArg=>Buffer */
case ACPI_TYPE_BUFFER:
if ((BitOffset + BitCount) >
(8 * (UINT32) SrcDesc->Buffer.Length))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Field size %d exceeds Buffer size %d (bits)\n",
BitOffset + BitCount, 8 * (UINT32) SrcDesc->Buffer.Length));
Status = AE_AML_BUFFER_LIMIT;
goto Cleanup;
}
/*
* Initialize areas of the field object that are common to all fields
* For FieldFlags, use LOCK_RULE = 0 (NO_LOCK), UPDATE_RULE = 0 (UPDATE_PRESERVE)
*/
Status = AcpiExPrepCommonFieldObject (ObjDesc, FieldFlags,
BitOffset, BitCount);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ObjDesc->BufferField.BufferObj = SrcDesc;
/* Reference count for SrcDesc inherits ObjDesc count */
SrcDesc->Common.ReferenceCount = (UINT16) (SrcDesc->Common.ReferenceCount +
ObjDesc->Common.ReferenceCount);
break;
/* Improper object type */
default:
if ((SrcDesc->Common.Type > (UINT8) INTERNAL_TYPE_REFERENCE) || !AcpiUtValidObjectType (SrcDesc->Common.Type)) /* TBD: This line MUST be a single line until AcpiSrc can handle it (block deletion) */
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Tried to create field in invalid object type %X\n",
SrcDesc->Common.Type));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Tried to create field in improper object type - %s\n",
AcpiUtGetTypeName (SrcDesc->Common.Type)));
}
Status = AE_AML_OPERAND_TYPE;
goto Cleanup;
}
if (AML_CREATE_FIELD_OP == Op->Opcode)
{
/* Delete object descriptor unique to CreateField */
AcpiUtRemoveReference (CntDesc);
CntDesc = NULL;
}
Cleanup:
/* Always delete the operands */
AcpiUtRemoveReference (OffDesc);
AcpiUtRemoveReference (SrcDesc);
if (AML_CREATE_FIELD_OP == Op->Opcode)
{
AcpiUtRemoveReference (CntDesc);
}
/* On failure, delete the result descriptor */
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ResDesc); /* Result descriptor */
}
else
{
/* Now the address and length are valid for this BufferField */
ObjDesc->BufferField.Flags |= AOPOBJ_DATA_VALID;
}
return_ACPI_STATUS (Status);
}
/*****************************************************************************
*
* FUNCTION: AcpiDsEvalRegionOperands
*
* PARAMETERS: Op - A valid region Op object
*
* RETURN: Status
*
* DESCRIPTION: Get region address and length
* Called from AcpiDsExecEndOp during OpRegion parse tree walk
*
****************************************************************************/
ACPI_STATUS
AcpiDsEvalRegionOperands (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *OperandDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *NextOp;
FUNCTION_TRACE_PTR ("DsEvalRegionOperands", Op);
/*
* This is where we evaluate the address and length fields of the OpRegion declaration
*/
Node = Op->Node;
/* NextOp points to the op that holds the SpaceID */
NextOp = Op->Value.Arg;
/* NextOp points to address op */
NextOp = NextOp->Next;
/* AcpiEvaluate/create the address and length operands */
Status = AcpiDsCreateOperands (WalkState, NextOp);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Resolve the length and address operands to numbers */
Status = AcpiExResolveOperands (Op->Opcode, WALK_OPERANDS, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
DUMP_OPERANDS (WALK_OPERANDS, IMODE_EXECUTE,
AcpiPsGetOpcodeName (Op->Opcode),
1, "after AcpiExResolveOperands");
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* Get the length operand and save it
* (at Top of stack)
*/
OperandDesc = WalkState->Operands[WalkState->NumOperands - 1];
ObjDesc->Region.Length = (UINT32) OperandDesc->Integer.Value;
AcpiUtRemoveReference (OperandDesc);
/*
* Get the address and save it
* (at top of stack - 1)
*/
OperandDesc = WalkState->Operands[WalkState->NumOperands - 2];
ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS) OperandDesc->Integer.Value;
AcpiUtRemoveReference (OperandDesc);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8lX%8.8lX Len %X\n",
ObjDesc, HIDWORD(ObjDesc->Region.Address), LODWORD(ObjDesc->Region.Address),
ObjDesc->Region.Length));
/* Now the address and length are valid for this opregion */
ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsExecBeginControlOp
*
* PARAMETERS: WalkList - The list that owns the walk stack
* Op - The control Op
*
* RETURN: Status
*
* DESCRIPTION: Handles all control ops encountered during control method
* execution.
*
******************************************************************************/
ACPI_STATUS
AcpiDsExecBeginControlOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op)
{
ACPI_STATUS Status = AE_OK;
ACPI_GENERIC_STATE *ControlState;
PROC_NAME ("DsExecBeginControlOp");
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", Op,
Op->Opcode, WalkState));
switch (Op->Opcode)
{
case AML_IF_OP:
case AML_WHILE_OP:
/*
* IF/WHILE: Create a new control state to manage these
* constructs. We need to manage these as a stack, in order
* to handle nesting.
*/
ControlState = AcpiUtCreateControlState ();
if (!ControlState)
{
Status = AE_NO_MEMORY;
break;
}
AcpiUtPushGenericState (&WalkState->ControlState, ControlState);
/*
* Save a pointer to the predicate for multiple executions
* of a loop
*/
WalkState->ControlState->Control.AmlPredicateStart =
WalkState->ParserState->Aml - 1;
/* TBD: can this be removed? */
/*AcpiPsPkgLengthEncodingSize (GET8 (WalkState->ParserState->Aml));*/
break;
case AML_ELSE_OP:
/* Predicate is in the state object */
/* If predicate is true, the IF was executed, ignore ELSE part */
if (WalkState->LastPredicate)
{
Status = AE_CTRL_TRUE;
}
break;
case AML_RETURN_OP:
break;
default:
break;
}
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsExecEndControlOp
*
* PARAMETERS: WalkList - The list that owns the walk stack
* Op - The control Op
*
* RETURN: Status
*
* DESCRIPTION: Handles all control ops encountered during control method
* execution.
*
*
******************************************************************************/
ACPI_STATUS
AcpiDsExecEndControlOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op)
{
ACPI_STATUS Status = AE_OK;
ACPI_GENERIC_STATE *ControlState;
PROC_NAME ("DsExecEndControlOp");
switch (Op->Opcode)
{
case AML_IF_OP:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", Op));
/*
* Save the result of the predicate in case there is an
* ELSE to come
*/
WalkState->LastPredicate =
(BOOLEAN) WalkState->ControlState->Common.Value;
/*
* Pop the control state that was created at the start
* of the IF and free it
*/
ControlState = AcpiUtPopGenericState (&WalkState->ControlState);
AcpiUtDeleteGenericState (ControlState);
break;
case AML_ELSE_OP:
break;
case AML_WHILE_OP:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", Op));
if (WalkState->ControlState->Common.Value)
{
/* Predicate was true, go back and evaluate it again! */
Status = AE_CTRL_PENDING;
}
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[WHILE_OP] termination! Op=%p\n", Op));
/* Pop this control state and free it */
ControlState = AcpiUtPopGenericState (&WalkState->ControlState);
WalkState->AmlLastWhile = ControlState->Control.AmlPredicateStart;
AcpiUtDeleteGenericState (ControlState);
break;
case AML_RETURN_OP:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"[RETURN_OP] Op=%p Arg=%p\n",Op, Op->Value.Arg));
/*
* One optional operand -- the return value
* It can be either an immediate operand or a result that
* has been bubbled up the tree
*/
if (Op->Value.Arg)
{
/* Return statement has an immediate operand */
Status = AcpiDsCreateOperands (WalkState, Op->Value.Arg);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* If value being returned is a Reference (such as
* an arg or local), resolve it now because it may
* cease to exist at the end of the method.
*/
Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Get the return value and save as the last result
* value. This is the only place where WalkState->ReturnDesc
* is set to anything other than zero!
*/
WalkState->ReturnDesc = WalkState->Operands[0];
}
else if ((WalkState->Results) &&
(WalkState->Results->Results.NumResults > 0))
{
/*
* The return value has come from a previous calculation.
*
* If value being returned is a Reference (such as
* an arg or local), resolve it now because it may
* cease to exist at the end of the method.
*
* Allow references created by the Index operator to return unchanged.
*/
if (VALID_DESCRIPTOR_TYPE (WalkState->Results->Results.ObjDesc [0], ACPI_DESC_TYPE_INTERNAL) &&
((WalkState->Results->Results.ObjDesc [0])->Common.Type == INTERNAL_TYPE_REFERENCE) &&
((WalkState->Results->Results.ObjDesc [0])->Reference.Opcode != AML_INDEX_OP))
{
Status = AcpiExResolveToValue (&WalkState->Results->Results.ObjDesc [0], WalkState);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
WalkState->ReturnDesc = WalkState->Results->Results.ObjDesc [0];
}
else
{
/* No return operand */
if (WalkState->NumOperands)
{
AcpiUtRemoveReference (WalkState->Operands [0]);
}
WalkState->Operands [0] = NULL;
WalkState->NumOperands = 0;
WalkState->ReturnDesc = NULL;
}
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Completed RETURN_OP State=%p, RetVal=%p\n",
WalkState, WalkState->ReturnDesc));
/* End the control method execution right now */
Status = AE_CTRL_TERMINATE;
break;
case AML_NOOP_OP:
/* Just do nothing! */
break;
case AML_BREAK_POINT_OP:
/* Call up to the OS service layer to handle this */
AcpiOsSignal (ACPI_SIGNAL_BREAKPOINT, "Executed AML Breakpoint opcode");
/* If and when it returns, all done. */
break;
case AML_BREAK_OP:
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Break to end of current package, Op=%p\n", Op));
/* TBD: update behavior for ACPI 2.0 */
/*
* As per the ACPI specification:
* "The break operation causes the current package
* execution to complete"
* "Break -- Stop executing the current code package
* at this point"
*
* Returning AE_FALSE here will cause termination of
* the current package, and execution will continue one
* level up, starting with the completion of the parent Op.
*/
Status = AE_CTRL_FALSE;
break;
case AML_CONTINUE_OP: /* ACPI 2.0 */
Status = AE_NOT_IMPLEMENTED;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown control opcode=%X Op=%p\n",
Op->Opcode, Op));
Status = AE_AML_BAD_OPCODE;
break;
}
return (Status);
}
Reference in New Issue View Git Blame Copy Permalink