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567 lines
16 KiB
C
567 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: nsconvert - Object conversions for objects returned by
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* predefined methods
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2019, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#include "acpredef.h"
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#include "amlresrc.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsconvert")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsConvertToInteger
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*
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* PARAMETERS: OriginalObject - Object to be converted
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* ReturnObject - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a String/Buffer object to an Integer.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsConvertToInteger (
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ACPI_OPERAND_OBJECT *OriginalObject,
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ACPI_OPERAND_OBJECT **ReturnObject)
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{
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ACPI_OPERAND_OBJECT *NewObject;
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ACPI_STATUS Status;
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UINT64 Value = 0;
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UINT32 i;
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switch (OriginalObject->Common.Type)
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{
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case ACPI_TYPE_STRING:
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/* String-to-Integer conversion */
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Status = AcpiUtStrtoul64 (OriginalObject->String.Pointer, &Value);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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break;
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case ACPI_TYPE_BUFFER:
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/* Buffer-to-Integer conversion. Max buffer size is 64 bits. */
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if (OriginalObject->Buffer.Length > 8)
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{
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return (AE_AML_OPERAND_TYPE);
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}
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/* Extract each buffer byte to create the integer */
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for (i = 0; i < OriginalObject->Buffer.Length; i++)
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{
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Value |= ((UINT64)
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OriginalObject->Buffer.Pointer[i] << (i * 8));
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}
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break;
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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NewObject = AcpiUtCreateIntegerObject (Value);
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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*ReturnObject = NewObject;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsConvertToString
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*
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* PARAMETERS: OriginalObject - Object to be converted
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* ReturnObject - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a Integer/Buffer object to a String.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsConvertToString (
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ACPI_OPERAND_OBJECT *OriginalObject,
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ACPI_OPERAND_OBJECT **ReturnObject)
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{
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ACPI_OPERAND_OBJECT *NewObject;
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ACPI_SIZE Length;
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ACPI_STATUS Status;
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switch (OriginalObject->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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/*
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* Integer-to-String conversion. Commonly, convert
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* an integer of value 0 to a NULL string. The last element of
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* _BIF and _BIX packages occasionally need this fix.
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*/
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if (OriginalObject->Integer.Value == 0)
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{
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/* Allocate a new NULL string object */
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NewObject = AcpiUtCreateStringObject (0);
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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}
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else
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{
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Status = AcpiExConvertToString (OriginalObject,
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&NewObject, ACPI_IMPLICIT_CONVERT_HEX);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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break;
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case ACPI_TYPE_BUFFER:
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/*
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* Buffer-to-String conversion. Use a ToString
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* conversion, no transform performed on the buffer data. The best
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* example of this is the _BIF method, where the string data from
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* the battery is often (incorrectly) returned as buffer object(s).
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*/
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Length = 0;
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while ((Length < OriginalObject->Buffer.Length) &&
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(OriginalObject->Buffer.Pointer[Length]))
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{
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Length++;
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}
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/* Allocate a new string object */
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NewObject = AcpiUtCreateStringObject (Length);
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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/*
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* Copy the raw buffer data with no transform. String is already NULL
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* terminated at Length+1.
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*/
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memcpy (NewObject->String.Pointer,
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OriginalObject->Buffer.Pointer, Length);
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break;
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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*ReturnObject = NewObject;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsConvertToBuffer
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*
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* PARAMETERS: OriginalObject - Object to be converted
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* ReturnObject - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsConvertToBuffer (
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ACPI_OPERAND_OBJECT *OriginalObject,
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ACPI_OPERAND_OBJECT **ReturnObject)
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{
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ACPI_OPERAND_OBJECT *NewObject;
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT **Elements;
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UINT32 *DwordBuffer;
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UINT32 Count;
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UINT32 i;
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switch (OriginalObject->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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/*
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* Integer-to-Buffer conversion.
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* Convert the Integer to a packed-byte buffer. _MAT and other
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* objects need this sometimes, if a read has been performed on a
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* Field object that is less than or equal to the global integer
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* size (32 or 64 bits).
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*/
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Status = AcpiExConvertToBuffer (OriginalObject, &NewObject);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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break;
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case ACPI_TYPE_STRING:
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/* String-to-Buffer conversion. Simple data copy */
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NewObject = AcpiUtCreateBufferObject
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(OriginalObject->String.Length);
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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memcpy (NewObject->Buffer.Pointer,
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OriginalObject->String.Pointer, OriginalObject->String.Length);
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break;
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case ACPI_TYPE_PACKAGE:
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/*
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* This case is often seen for predefined names that must return a
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* Buffer object with multiple DWORD integers within. For example,
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* _FDE and _GTM. The Package can be converted to a Buffer.
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*/
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/* All elements of the Package must be integers */
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Elements = OriginalObject->Package.Elements;
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Count = OriginalObject->Package.Count;
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for (i = 0; i < Count; i++)
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{
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if ((!*Elements) ||
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((*Elements)->Common.Type != ACPI_TYPE_INTEGER))
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{
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return (AE_AML_OPERAND_TYPE);
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}
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Elements++;
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}
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/* Create the new buffer object to replace the Package */
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NewObject = AcpiUtCreateBufferObject (ACPI_MUL_4 (Count));
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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/* Copy the package elements (integers) to the buffer as DWORDs */
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Elements = OriginalObject->Package.Elements;
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DwordBuffer = ACPI_CAST_PTR (UINT32, NewObject->Buffer.Pointer);
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for (i = 0; i < Count; i++)
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{
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*DwordBuffer = (UINT32) (*Elements)->Integer.Value;
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DwordBuffer++;
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Elements++;
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}
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break;
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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*ReturnObject = NewObject;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsConvertToUnicode
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*
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* PARAMETERS: Scope - Namespace node for the method/object
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* OriginalObject - ASCII String Object to be converted
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* ReturnObject - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a String object to a Unicode string Buffer.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsConvertToUnicode (
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ACPI_NAMESPACE_NODE *Scope,
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ACPI_OPERAND_OBJECT *OriginalObject,
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ACPI_OPERAND_OBJECT **ReturnObject)
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{
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ACPI_OPERAND_OBJECT *NewObject;
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char *AsciiString;
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UINT16 *UnicodeBuffer;
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UINT32 UnicodeLength;
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UINT32 i;
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if (!OriginalObject)
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{
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return (AE_OK);
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}
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/* If a Buffer was returned, it must be at least two bytes long */
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if (OriginalObject->Common.Type == ACPI_TYPE_BUFFER)
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{
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if (OriginalObject->Buffer.Length < 2)
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{
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return (AE_AML_OPERAND_VALUE);
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}
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*ReturnObject = NULL;
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return (AE_OK);
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}
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/*
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* The original object is an ASCII string. Convert this string to
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* a unicode buffer.
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*/
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AsciiString = OriginalObject->String.Pointer;
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UnicodeLength = (OriginalObject->String.Length * 2) + 2;
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/* Create a new buffer object for the Unicode data */
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NewObject = AcpiUtCreateBufferObject (UnicodeLength);
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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UnicodeBuffer = ACPI_CAST_PTR (UINT16, NewObject->Buffer.Pointer);
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/* Convert ASCII to Unicode */
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for (i = 0; i < OriginalObject->String.Length; i++)
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{
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UnicodeBuffer[i] = (UINT16) AsciiString[i];
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}
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*ReturnObject = NewObject;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsConvertToResource
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*
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* PARAMETERS: Scope - Namespace node for the method/object
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* OriginalObject - Object to be converted
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* ReturnObject - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful
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*
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* DESCRIPTION: Attempt to convert a Integer object to a ResourceTemplate
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* Buffer.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsConvertToResource (
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ACPI_NAMESPACE_NODE *Scope,
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ACPI_OPERAND_OBJECT *OriginalObject,
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ACPI_OPERAND_OBJECT **ReturnObject)
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{
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ACPI_OPERAND_OBJECT *NewObject;
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UINT8 *Buffer;
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/*
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* We can fix the following cases for an expected resource template:
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* 1. No return value (interpreter slack mode is disabled)
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* 2. A "Return (Zero)" statement
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* 3. A "Return empty buffer" statement
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*
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* We will return a buffer containing a single EndTag
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* resource descriptor.
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*/
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if (OriginalObject)
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{
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switch (OriginalObject->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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/* We can only repair an Integer==0 */
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if (OriginalObject->Integer.Value)
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{
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return (AE_AML_OPERAND_TYPE);
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}
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break;
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case ACPI_TYPE_BUFFER:
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if (OriginalObject->Buffer.Length)
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{
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/* Additional checks can be added in the future */
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*ReturnObject = NULL;
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return (AE_OK);
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}
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break;
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case ACPI_TYPE_STRING:
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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}
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/* Create the new buffer object for the resource descriptor */
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NewObject = AcpiUtCreateBufferObject (2);
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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Buffer = ACPI_CAST_PTR (UINT8, NewObject->Buffer.Pointer);
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/* Initialize the Buffer with a single EndTag descriptor */
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Buffer[0] = (ACPI_RESOURCE_NAME_END_TAG | ASL_RDESC_END_TAG_SIZE);
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Buffer[1] = 0x00;
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*ReturnObject = NewObject;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsConvertToReference
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*
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* PARAMETERS: Scope - Namespace node for the method/object
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* OriginalObject - Object to be converted
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* ReturnObject - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful
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*
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* DESCRIPTION: Attempt to convert a Integer object to a ObjectReference.
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* Buffer.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsConvertToReference (
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ACPI_NAMESPACE_NODE *Scope,
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ACPI_OPERAND_OBJECT *OriginalObject,
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ACPI_OPERAND_OBJECT **ReturnObject)
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{
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ACPI_OPERAND_OBJECT *NewObject = NULL;
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_GENERIC_STATE ScopeInfo;
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char *Name;
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ACPI_FUNCTION_NAME (NsConvertToReference);
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/* Convert path into internal presentation */
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Status = AcpiNsInternalizeName (OriginalObject->String.Pointer, &Name);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Find the namespace node */
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ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Scope);
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Status = AcpiNsLookup (&ScopeInfo, Name,
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ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
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if (ACPI_FAILURE (Status))
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{
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/* Check if we are resolving a named reference within a package */
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ACPI_ERROR_NAMESPACE (&ScopeInfo,
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OriginalObject->String.Pointer, Status);
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goto ErrorExit;
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}
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/* Create and init a new internal ACPI object */
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NewObject = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
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if (!NewObject)
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{
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Status = AE_NO_MEMORY;
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goto ErrorExit;
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}
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NewObject->Reference.Node = Node;
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NewObject->Reference.Object = Node->Object;
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NewObject->Reference.Class = ACPI_REFCLASS_NAME;
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/*
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* Increase reference of the object if needed (the object is likely a
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* null for device nodes).
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*/
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AcpiUtAddReference (Node->Object);
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ErrorExit:
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ACPI_FREE (Name);
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*ReturnObject = NewObject;
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return (AE_OK);
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}
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