/******************************************************************************
*
* Module Name: exconvrt - Object conversion routines
* $Revision: 49 $
*
*****************************************************************************/
/******************************************************************************
*
* 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 __EXCONVRT_C__
#include "acpi.h"
#include "acinterp.h"
#include "amlcode.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exconvrt")
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToInteger
*
* PARAMETERS: *ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Convert an ACPI Object to an integer.
*
******************************************************************************/
ACPI_STATUS
AcpiExConvertToInteger (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT **ResultDesc,
ACPI_WALK_STATE *WalkState)
{
UINT32 i;
ACPI_OPERAND_OBJECT *RetDesc;
UINT32 Count;
UINT8 *Pointer;
ACPI_INTEGER Result;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE_PTR ("ExConvertToInteger", ObjDesc);
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_INTEGER:
*ResultDesc = ObjDesc;
return_ACPI_STATUS (AE_OK);
case ACPI_TYPE_STRING:
Pointer = (UINT8 *) ObjDesc->String.Pointer;
Count = ObjDesc->String.Length;
break;
case ACPI_TYPE_BUFFER:
Pointer = ObjDesc->Buffer.Pointer;
Count = ObjDesc->Buffer.Length;
break;
default:
return_ACPI_STATUS (AE_TYPE);
}
/*
* Convert the buffer/string to an integer. Note that both buffers and
* strings are treated as raw data - we don't convert ascii to hex for
* strings.
*
* There are two terminating conditions for the loop:
* 1) The size of an integer has been reached, or
* 2) The end of the buffer or string has been reached
*/
Result = 0;
/* Transfer no more than an integer's worth of data */
if (Count > AcpiGbl_IntegerByteWidth)
{
Count = AcpiGbl_IntegerByteWidth;
}
/*
* String conversion is different than Buffer conversion
*/
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_STRING:
/*
* Convert string to an integer
* String must be hexadecimal as per the ACPI specification
*/
Status = AcpiUtStrtoul64 ((char *) Pointer, 16, &Result);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
case ACPI_TYPE_BUFFER:
/*
* Buffer conversion - we simply grab enough raw data from the
* buffer to fill an integer
*/
for (i = 0; i < Count; i++)
{
/*
* Get next byte and shift it into the Result.
* Little endian is used, meaning that the first byte of the buffer
* is the LSB of the integer
*/
Result |= (((ACPI_INTEGER) Pointer[i]) << (i * 8));
}
break;
default:
/* No other types can get here */
break;
}
/*
* Create a new integer
*/
RetDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!RetDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the Result */
RetDesc->Integer.Value = Result;
/*
* If we are about to overwrite the original object on the operand stack,
* we must remove a reference on the original object because we are
* essentially removing it from the stack.
*/
if (*ResultDesc == ObjDesc)
{
if (WalkState->Opcode != AML_STORE_OP)
{
AcpiUtRemoveReference (ObjDesc);
}
}
*ResultDesc = RetDesc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToBuffer
*
* PARAMETERS: *ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Convert an ACPI Object to a Buffer
*
******************************************************************************/
ACPI_STATUS
AcpiExConvertToBuffer (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT **ResultDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT *RetDesc;
UINT32 i;
UINT8 *NewBuf;
ACPI_FUNCTION_TRACE_PTR ("ExConvertToBuffer", ObjDesc);
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_BUFFER:
/* No conversion necessary */
*ResultDesc = ObjDesc;
return_ACPI_STATUS (AE_OK);
case ACPI_TYPE_INTEGER:
/*
* Create a new Buffer object.
* Need enough space for one integer
*/
RetDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth);
if (!RetDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the integer to the buffer */
NewBuf = RetDesc->Buffer.Pointer;
for (i = 0; i < AcpiGbl_IntegerByteWidth; i++)
{
NewBuf[i] = (UINT8) (ObjDesc->Integer.Value >> (i * 8));
}
break;
case ACPI_TYPE_STRING:
/*
* Create a new Buffer object
* Size will be the string length
*/
RetDesc = AcpiUtCreateBufferObject ((ACPI_SIZE) ObjDesc->String.Length);
if (!RetDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the string to the buffer */
NewBuf = RetDesc->Buffer.Pointer;
ACPI_STRNCPY ((char *) NewBuf, (char *) ObjDesc->String.Pointer,
ObjDesc->String.Length);
break;
default:
return_ACPI_STATUS (AE_TYPE);
}
/* Mark buffer initialized */
RetDesc->Common.Flags |= AOPOBJ_DATA_VALID;
/*
* If we are about to overwrite the original object on the operand stack,
* we must remove a reference on the original object because we are
* essentially removing it from the stack.
*/
if (*ResultDesc == ObjDesc)
{
if (WalkState->Opcode != AML_STORE_OP)
{
AcpiUtRemoveReference (ObjDesc);
}
}
*ResultDesc = RetDesc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertAscii
*
* PARAMETERS: Integer - Value to be converted
* Base - 10 or 16
* String - Where the string is returned
* DataWidth - Size of data item to be converted
*
* RETURN: Actual string length
*
* DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
*
******************************************************************************/
UINT32
AcpiExConvertToAscii (
ACPI_INTEGER Integer,
UINT32 Base,
UINT8 *String,
UINT8 DataWidth)
{
UINT32 i;
UINT32 j;
UINT32 k = 0;
char HexDigit;
ACPI_INTEGER Digit;
UINT32 Remainder;
UINT32 Length;
BOOLEAN LeadingZero;
ACPI_FUNCTION_ENTRY ();
if (DataWidth < sizeof (ACPI_INTEGER))
{
LeadingZero = FALSE;
Length = DataWidth;
}
else
{
LeadingZero = TRUE;
Length = sizeof (ACPI_INTEGER);
}
switch (Base)
{
case 10:
Remainder = 0;
for (i = ACPI_MAX_DECIMAL_DIGITS; i > 0 ; i--)
{
/* Divide by nth factor of 10 */
Digit = Integer;
for (j = 1; j < i; j++)
{
(void) AcpiUtShortDivide (&Digit, 10, &Digit, &Remainder);
}
/* Create the decimal digit */
if (Digit != 0)
{
LeadingZero = FALSE;
}
if (!LeadingZero)
{
String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
k++;
}
}
break;
case 16:
/* Copy the integer to the buffer */
for (i = 0, j = ((Length * 2) -1); i < (Length * 2); i++, j--)
{
HexDigit = AcpiUtHexToAsciiChar (Integer, (j * 4));
if (HexDigit != ACPI_ASCII_ZERO)
{
LeadingZero = FALSE;
}
if (!LeadingZero)
{
String[k] = (UINT8) HexDigit;
k++;
}
}
break;
default:
break;
}
/*
* Since leading zeros are supressed, we must check for the case where
* the integer equals 0.
*
* Finally, null terminate the string and return the length
*/
if (!k)
{
String [0] = ACPI_ASCII_ZERO;
k = 1;
}
String [k] = 0;
return (k);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToString
*
* PARAMETERS: *ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Convert an ACPI Object to a string
*
******************************************************************************/
ACPI_STATUS
AcpiExConvertToString (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT **ResultDesc,
UINT32 Base,
UINT32 MaxLength,
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT *RetDesc;
UINT32 i;
UINT32 StringLength;
UINT8 *NewBuf;
UINT8 *Pointer;
ACPI_FUNCTION_TRACE_PTR ("ExConvertToString", ObjDesc);
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_STRING:
if (MaxLength >= ObjDesc->String.Length)
{
*ResultDesc = ObjDesc;
return_ACPI_STATUS (AE_OK);
}
else
{
/* Must copy the string first and then truncate it */
return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
}
case ACPI_TYPE_INTEGER:
StringLength = AcpiGbl_IntegerByteWidth * 2;
if (Base == 10)
{
StringLength = ACPI_MAX_DECIMAL_DIGITS;
}
/*
* Create a new String
*/
RetDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
if (!RetDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Need enough space for one ASCII integer plus null terminator */
NewBuf = ACPI_MEM_CALLOCATE ((ACPI_SIZE) StringLength + 1);
if (!NewBuf)
{
ACPI_REPORT_ERROR
(("ExConvertToString: Buffer allocation failure\n"));
AcpiUtRemoveReference (RetDesc);
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Convert */
i = AcpiExConvertToAscii (ObjDesc->Integer.Value, Base, NewBuf, sizeof (ACPI_INTEGER));
/* Null terminate at the correct place */
if (MaxLength < i)
{
NewBuf[MaxLength] = 0;
RetDesc->String.Length = MaxLength;
}
else
{
NewBuf [i] = 0;
RetDesc->String.Length = i;
}
RetDesc->Buffer.Pointer = NewBuf;
break;
case ACPI_TYPE_BUFFER:
/* Find the string length */
Pointer = ObjDesc->Buffer.Pointer;
for (StringLength = 0; StringLength < ObjDesc->Buffer.Length; StringLength++)
{
/* Exit on null terminator */
if (!Pointer[StringLength])
{
break;
}
}
if (MaxLength > ACPI_MAX_STRING_CONVERSION)
{
if (StringLength > ACPI_MAX_STRING_CONVERSION)
{
return_ACPI_STATUS (AE_AML_STRING_LIMIT);
}
}
/*
* Create a new string object
*/
RetDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
if (!RetDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* String length is the lesser of the Max or the actual length */
if (MaxLength < StringLength)
{
StringLength = MaxLength;
}
NewBuf = ACPI_MEM_CALLOCATE ((ACPI_SIZE) StringLength + 1);
if (!NewBuf)
{
ACPI_REPORT_ERROR
(("ExConvertToString: Buffer allocation failure\n"));
AcpiUtRemoveReference (RetDesc);
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the appropriate number of buffer characters */
ACPI_MEMCPY (NewBuf, Pointer, StringLength);
/* Null terminate */
NewBuf [StringLength] = 0;
RetDesc->Buffer.Pointer = NewBuf;
RetDesc->String.Length = StringLength;
break;
default:
return_ACPI_STATUS (AE_TYPE);
}
/*
* If we are about to overwrite the original object on the operand stack,
* we must remove a reference on the original object because we are
* essentially removing it from the stack.
*/
if (*ResultDesc == ObjDesc)
{
if (WalkState->Opcode != AML_STORE_OP)
{
AcpiUtRemoveReference (ObjDesc);
}
}
*ResultDesc = RetDesc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToTargetType
*
* PARAMETERS: DestinationType - Current type of the destination
* SourceDesc - Source object to be converted.
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Implements "implicit conversion" rules for storing an object.
*
******************************************************************************/
ACPI_STATUS
AcpiExConvertToTargetType (
ACPI_OBJECT_TYPE DestinationType,
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT **ResultDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE ("ExConvertToTargetType");
/* Default behavior */
*ResultDesc = SourceDesc;
/*
* If required by the target,
* perform implicit conversion on the source before we store it.
*/
switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs))
{
case ARGI_SIMPLE_TARGET:
case ARGI_FIXED_TARGET:
case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */
switch (DestinationType)
{
case ACPI_TYPE_LOCAL_REGION_FIELD:
/*
* Named field can always handle conversions
*/
break;
default:
/* No conversion allowed for these types */
if (DestinationType != ACPI_GET_OBJECT_TYPE (SourceDesc))
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Explicit operator, will store (%s) over existing type (%s)\n",
AcpiUtGetObjectTypeName (SourceDesc),
AcpiUtGetTypeName (DestinationType)));
Status = AE_TYPE;
}
}
break;
case ARGI_TARGETREF:
switch (DestinationType)
{
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
/*
* These types require an Integer operand. We can convert
* a Buffer or a String to an Integer if necessary.
*/
Status = AcpiExConvertToInteger (SourceDesc, ResultDesc, WalkState);
break;
case ACPI_TYPE_STRING:
/*
* The operand must be a String. We can convert an
* Integer or Buffer if necessary
*/
Status = AcpiExConvertToString (SourceDesc, ResultDesc, 16, ACPI_UINT32_MAX, WalkState);
break;
case ACPI_TYPE_BUFFER:
/*
* The operand must be a Buffer. We can convert an
* Integer or String if necessary
*/
Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc, WalkState);
break;
default:
Status = AE_AML_INTERNAL;
break;
}
break;
case ARGI_REFERENCE:
/*
* CreateXxxxField cases - we are storing the field object into the name
*/
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Unknown Target type ID 0x%X Op %s DestType %s\n",
GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs),
WalkState->OpInfo->Name, AcpiUtGetTypeName (DestinationType)));
Status = AE_AML_INTERNAL;
}
/*
* Source-to-Target conversion semantics:
*
* If conversion to the target type cannot be performed, then simply
* overwrite the target with the new object and type.
*/
if (Status == AE_TYPE)
{
Status = AE_OK;
}
return_ACPI_STATUS (Status);
}
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