/******************************************************************************
*
* Module Name: exoparg1 - AML execution - opcodes with 1 argument
* $Revision: 147 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2003, 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 __EXOPARG1_C__
#include "acpi.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exoparg1")
/*!
* Naming convention for AML interpreter execution routines.
*
* The routines that begin execution of AML opcodes are named with a common
* convention based upon the number of arguments, the number of target operands,
* and whether or not a value is returned:
*
* AcpiExOpcode_xA_yT_zR
*
* Where:
*
* xA - ARGUMENTS: The number of arguments (input operands) that are
* required for this opcode type (1 through 6 args).
* yT - TARGETS: The number of targets (output operands) that are required
* for this opcode type (0, 1, or 2 targets).
* zR - RETURN VALUE: Indicates whether this opcode type returns a value
* as the function return (0 or 1).
*
* The AcpiExOpcode* functions are called via the Dispatcher component with
* fully resolved operands.
!*/
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_1A_0T_0R
*
* PARAMETERS: WalkState - Current state (contains AML opcode)
*
* RETURN: Status
*
* DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
* object stack
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_1A_0T_0R (
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE_STR ("ExOpcode_1A_0T_0R", AcpiPsGetOpcodeName (WalkState->Opcode));
/* Examine the AML opcode */
switch (WalkState->Opcode)
{
case AML_RELEASE_OP: /* Release (MutexObject) */
Status = AcpiExReleaseMutex (Operand[0], WalkState);
break;
case AML_RESET_OP: /* Reset (EventObject) */
Status = AcpiExSystemResetEvent (Operand[0]);
break;
case AML_SIGNAL_OP: /* Signal (EventObject) */
Status = AcpiExSystemSignalEvent (Operand[0]);
break;
case AML_SLEEP_OP: /* Sleep (MsecTime) */
Status = AcpiExSystemDoSuspend ((UINT32) Operand[0]->Integer.Value);
break;
case AML_STALL_OP: /* Stall (UsecTime) */
Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value);
break;
case AML_UNLOAD_OP: /* Unload (Handle) */
Status = AcpiExUnloadTable (Operand[0]);
break;
default: /* Unknown opcode */
ACPI_REPORT_ERROR (("AcpiExOpcode_1A_0T_0R: Unknown opcode %X\n",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
break;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_1A_1T_0R
*
* PARAMETERS: WalkState - Current state (contains AML opcode)
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with one argument, one target, and no
* return value.
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_1A_1T_0R (
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_FUNCTION_TRACE_STR ("ExOpcode_1A_1T_0R", AcpiPsGetOpcodeName (WalkState->Opcode));
/* Examine the AML opcode */
switch (WalkState->Opcode)
{
case AML_LOAD_OP:
Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState);
break;
default: /* Unknown opcode */
ACPI_REPORT_ERROR (("AcpiExOpcode_1A_1T_0R: Unknown opcode %X\n",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
Cleanup:
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_1A_1T_1R
*
* PARAMETERS: WalkState - Current state (contains AML opcode)
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with one argument, one target, and a
* return value.
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_1A_1T_1R (
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL;
UINT32 Temp32;
UINT32 i;
UINT32 j;
ACPI_INTEGER Digit;
ACPI_FUNCTION_TRACE_STR ("ExOpcode_1A_1T_1R", AcpiPsGetOpcodeName (WalkState->Opcode));
/* Examine the AML opcode */
switch (WalkState->Opcode)
{
case AML_BIT_NOT_OP:
case AML_FIND_SET_LEFT_BIT_OP:
case AML_FIND_SET_RIGHT_BIT_OP:
case AML_FROM_BCD_OP:
case AML_TO_BCD_OP:
case AML_COND_REF_OF_OP:
/* Create a return object of type Integer for these opcodes */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
switch (WalkState->Opcode)
{
case AML_BIT_NOT_OP: /* Not (Operand, Result) */
ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value;
break;
case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */
ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
/*
* Acpi specification describes Integer type as a little
* endian unsigned value, so this boundary condition is valid.
*/
for (Temp32 = 0; ReturnDesc->Integer.Value && Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
{
ReturnDesc->Integer.Value >>= 1;
}
ReturnDesc->Integer.Value = Temp32;
break;
case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */
ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
/*
* The Acpi specification describes Integer type as a little
* endian unsigned value, so this boundary condition is valid.
*/
for (Temp32 = 0; ReturnDesc->Integer.Value && Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
{
ReturnDesc->Integer.Value <<= 1;
}
/* Since the bit position is one-based, subtract from 33 (65) */
ReturnDesc->Integer.Value = Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32;
break;
case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */
/*
* The 64-bit ACPI integer can hold 16 4-bit BCD integers
*/
ReturnDesc->Integer.Value = 0;
for (i = 0; i < ACPI_MAX_BCD_DIGITS; i++)
{
/* Get one BCD digit */
Digit = (ACPI_INTEGER) ((Operand[0]->Integer.Value >> (i * 4)) & 0xF);
/* Check the range of the digit */
if (Digit > 9)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "BCD digit too large: %d\n",
(UINT32) Digit));
Status = AE_AML_NUMERIC_OVERFLOW;
goto Cleanup;
}
if (Digit > 0)
{
/* Sum into the result with the appropriate power of 10 */
for (j = 0; j < i; j++)
{
Digit *= 10;
}
ReturnDesc->Integer.Value += Digit;
}
}
break;
case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */
if (Operand[0]->Integer.Value > ACPI_MAX_BCD_VALUE)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "BCD overflow: %8.8X%8.8X\n",
ACPI_HIDWORD(Operand[0]->Integer.Value),
ACPI_LODWORD(Operand[0]->Integer.Value)));
Status = AE_AML_NUMERIC_OVERFLOW;
goto Cleanup;
}
ReturnDesc->Integer.Value = 0;
for (i = 0; i < ACPI_MAX_BCD_DIGITS; i++)
{
/* Divide by nth factor of 10 */
Temp32 = 0;
Digit = Operand[0]->Integer.Value;
for (j = 0; j < i; j++)
{
(void) AcpiUtShortDivide (&Digit, 10, &Digit, &Temp32);
}
/* Create the BCD digit from the remainder above */
if (Digit > 0)
{
ReturnDesc->Integer.Value += ((ACPI_INTEGER) Temp32 << (i * 4));
}
}
break;
case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */
/*
* This op is a little strange because the internal return value is
* different than the return value stored in the result descriptor
* (There are really two return values)
*/
if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
{
/*
* This means that the object does not exist in the namespace,
* return FALSE
*/
ReturnDesc->Integer.Value = 0;
goto Cleanup;
}
/* Get the object reference, store it, and remove our reference */
Status = AcpiExGetObjectReference (Operand[0], &ReturnDesc2, WalkState);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
AcpiUtRemoveReference (ReturnDesc2);
/* The object exists in the namespace, return TRUE */
ReturnDesc->Integer.Value = ACPI_INTEGER_MAX;
goto Cleanup;
default:
/* No other opcodes get here */
break;
}
break;
case AML_STORE_OP: /* Store (Source, Target) */
/*
* A store operand is typically a number, string, buffer or lvalue
* Be careful about deleting the source object,
* since the object itself may have been stored.
*/
Status = AcpiExStore (Operand[0], Operand[1], WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* It is possible that the Store already produced a return object */
if (!WalkState->ResultObj)
{
/*
* Normally, we would remove a reference on the Operand[0] parameter;
* But since it is being used as the internal return object
* (meaning we would normally increment it), the two cancel out,
* and we simply don't do anything.
*/
WalkState->ResultObj = Operand[0];
WalkState->Operands[0] = NULL; /* Prevent deletion */
}
return_ACPI_STATUS (Status);
/*
* ACPI 2.0 Opcodes
*/
case AML_COPY_OP: /* Copy (Source, Target) */
Status = AcpiUtCopyIobjectToIobject (Operand[0], &ReturnDesc, WalkState);
break;
case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */
Status = AcpiExConvertToString (Operand[0], &ReturnDesc, 10, ACPI_UINT32_MAX, WalkState);
break;
case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */
Status = AcpiExConvertToString (Operand[0], &ReturnDesc, 16, ACPI_UINT32_MAX, WalkState);
break;
case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */
Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc, WalkState);
break;
case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */
Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, WalkState);
break;
case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */
case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */
/*
* These are two obsolete opcodes
*/
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s is obsolete and not implemented\n",
AcpiPsGetOpcodeName (WalkState->Opcode)));
Status = AE_SUPPORT;
goto Cleanup;
default: /* Unknown opcode */
ACPI_REPORT_ERROR (("AcpiExOpcode_1A_1T_1R: Unknown opcode %X\n",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
/*
* Store the return value computed above into the target object
*/
Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
Cleanup:
if (!WalkState->ResultObj)
{
WalkState->ResultObj = ReturnDesc;
}
/* Delete return object on error */
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ReturnDesc);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_1A_0T_1R
*
* PARAMETERS: WalkState - Current state (contains AML opcode)
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with one argument, no target, and a return value
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_1A_0T_1R (
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *TempDesc;
ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
ACPI_STATUS Status = AE_OK;
UINT32 Type;
ACPI_INTEGER Value;
ACPI_FUNCTION_TRACE_STR ("ExOpcode_1A_0T_0R", AcpiPsGetOpcodeName (WalkState->Opcode));
/* Examine the AML opcode */
switch (WalkState->Opcode)
{
case AML_LNOT_OP: /* LNot (Operand) */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
ReturnDesc->Integer.Value = !Operand[0]->Integer.Value;
break;
case AML_DECREMENT_OP: /* Decrement (Operand) */
case AML_INCREMENT_OP: /* Increment (Operand) */
/*
* Since we are expecting a Reference operand, it
* can be either a NS Node or an internal object.
*/
ReturnDesc = Operand[0];
if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_OPERAND)
{
/* Internal reference object - prevent deletion */
AcpiUtAddReference (ReturnDesc);
}
/*
* Convert the ReturnDesc Reference to a Number
* (This removes a reference on the ReturnDesc object)
*/
Status = AcpiExResolveOperands (AML_LNOT_OP, &ReturnDesc, WalkState);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s: bad operand(s) %s\n",
AcpiPsGetOpcodeName (WalkState->Opcode), AcpiFormatException(Status)));
goto Cleanup;
}
/*
* ReturnDesc is now guaranteed to be an Integer object
* Do the actual increment or decrement
*/
if (AML_INCREMENT_OP == WalkState->Opcode)
{
ReturnDesc->Integer.Value++;
}
else
{
ReturnDesc->Integer.Value--;
}
/* Store the result back in the original descriptor */
Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
break;
case AML_TYPE_OP: /* ObjectType (SourceObject) */
/* Get the type of the base object */
Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Allocate a descriptor to hold the type. */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
ReturnDesc->Integer.Value = Type;
break;
case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */
/* Get the base object */
Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, &TempDesc);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/*
* Type is guaranteed to be a buffer, string, or package at this
* point (even if the original operand was an object reference, it
* will be resolved and typechecked during operand resolution.)
*/
switch (Type)
{
case ACPI_TYPE_BUFFER:
Value = TempDesc->Buffer.Length;
break;
case ACPI_TYPE_STRING:
Value = TempDesc->String.Length;
break;
case ACPI_TYPE_PACKAGE:
Value = TempDesc->Package.Count;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "SizeOf, Not Buf/Str/Pkg - found type %s\n",
AcpiUtGetTypeName (Type)));
Status = AE_AML_OPERAND_TYPE;
goto Cleanup;
}
/*
* Now that we have the size of the object, create a result
* object to hold the value
*/
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
ReturnDesc->Integer.Value = Value;
break;
case AML_REF_OF_OP: /* RefOf (SourceObject) */
Status = AcpiExGetObjectReference (Operand[0], &ReturnDesc, WalkState);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
break;
case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */
/* Check for a method local or argument, or standalone String */
if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED)
{
switch (ACPI_GET_OBJECT_TYPE (Operand[0]))
{
case ACPI_TYPE_LOCAL_REFERENCE:
/*
* This is a DerefOf (LocalX | ArgX)
*
* Must resolve/dereference the local/arg reference first
*/
switch (Operand[0]->Reference.Opcode)
{
case AML_LOCAL_OP:
case AML_ARG_OP:
/* Set Operand[0] to the value of the local/arg */
Status = AcpiDsMethodDataGetValue (Operand[0]->Reference.Opcode,
Operand[0]->Reference.Offset, WalkState, &TempDesc);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/*
* Delete our reference to the input object and
* point to the object just retrieved
*/
AcpiUtRemoveReference (Operand[0]);
Operand[0] = TempDesc;
break;
case AML_REF_OF_OP:
/* Get the object to which the reference refers */
TempDesc = Operand[0]->Reference.Object;
AcpiUtRemoveReference (Operand[0]);
Operand[0] = TempDesc;
break;
default:
/* Must be an Index op - handled below */
break;
}
break;
case ACPI_TYPE_STRING:
/*
* This is a DerefOf (String). The string is a reference to a named ACPI object.
*
* 1) Find the owning Node
* 2) Dereference the node to an actual object. Could be a Field, so we nee
* to resolve the node to a value.
*/
Status = AcpiNsGetNodeByPath (Operand[0]->String.Pointer,
WalkState->ScopeInfo->Scope.Node, ACPI_NS_SEARCH_PARENT,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ReturnDesc));
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Status = AcpiExResolveNodeToValue (
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ReturnDesc), WalkState);
goto Cleanup;
default:
Status = AE_AML_OPERAND_TYPE;
goto Cleanup;
}
}
/* Operand[0] may have changed from the code above */
if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
{
/*
* This is a DerefOf (ObjectReference)
* Get the actual object from the Node (This is the dereference).
* -- This case may only happen when a LocalX or ArgX is dereferenced above.
*/
ReturnDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) Operand[0]);
}
else
{
/*
* This must be a reference object produced by either the Index() or
* RefOf() operator
*/
switch (Operand[0]->Reference.Opcode)
{
case AML_INDEX_OP:
/*
* The target type for the Index operator must be
* either a Buffer or a Package
*/
switch (Operand[0]->Reference.TargetType)
{
case ACPI_TYPE_BUFFER_FIELD:
TempDesc = Operand[0]->Reference.Object;
/*
* Create a new object that contains one element of the
* buffer -- the element pointed to by the index.
*
* NOTE: index into a buffer is NOT a pointer to a
* sub-buffer of the main buffer, it is only a pointer to a
* single element (byte) of the buffer!
*/
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/*
* Since we are returning the value of the buffer at the
* indexed location, we don't need to add an additional
* reference to the buffer itself.
*/
ReturnDesc->Integer.Value =
TempDesc->Buffer.Pointer[Operand[0]->Reference.Offset];
break;
case ACPI_TYPE_PACKAGE:
/*
* Return the referenced element of the package. We must add
* another reference to the referenced object, however.
*/
ReturnDesc = *(Operand[0]->Reference.Where);
if (!ReturnDesc)
{
/*
* We can't return a NULL dereferenced value. This is
* an uninitialized package element and is thus a
* severe error.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "NULL package element obj %p\n",
Operand[0]));
Status = AE_AML_UNINITIALIZED_ELEMENT;
goto Cleanup;
}
AcpiUtAddReference (ReturnDesc);
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Index TargetType %X in obj %p\n",
Operand[0]->Reference.TargetType, Operand[0]));
Status = AE_AML_OPERAND_TYPE;
goto Cleanup;
}
break;
case AML_REF_OF_OP:
ReturnDesc = Operand[0]->Reference.Object;
if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) == ACPI_DESC_TYPE_NAMED)
{
ReturnDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ReturnDesc);
}
/* Add another reference to the object! */
AcpiUtAddReference (ReturnDesc);
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown opcode in ref(%p) - %X\n",
Operand[0], Operand[0]->Reference.Opcode));
Status = AE_TYPE;
goto Cleanup;
}
}
break;
default:
ACPI_REPORT_ERROR (("AcpiExOpcode_1A_0T_1R: Unknown opcode %X\n",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
Cleanup:
/* Delete return object on error */
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ReturnDesc);
}
WalkState->ResultObj = ReturnDesc;
return_ACPI_STATUS (Status);
}
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