745 lines
20 KiB
C
745 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: exconvrt - Object conversion routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, 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 "acinterp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exconvrt")
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/* Local prototypes */
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static UINT32
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AcpiExConvertToAscii (
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UINT64 Integer,
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UINT16 Base,
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UINT8 *String,
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UINT8 MaxLength);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExConvertToInteger
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*
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* PARAMETERS: ObjDesc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* ResultDesc - Where the new Integer object is returned
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* Flags - Used for string conversion
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an ACPI Object to an integer.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExConvertToInteger (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **ResultDesc,
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UINT32 Flags)
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{
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ACPI_OPERAND_OBJECT *ReturnDesc;
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UINT8 *Pointer;
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UINT64 Result;
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UINT32 i;
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UINT32 Count;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc);
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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/* No conversion necessary */
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*ResultDesc = ObjDesc;
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return_ACPI_STATUS (AE_OK);
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case ACPI_TYPE_BUFFER:
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case ACPI_TYPE_STRING:
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/* Note: Takes advantage of common buffer/string fields */
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Pointer = ObjDesc->Buffer.Pointer;
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Count = ObjDesc->Buffer.Length;
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break;
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default:
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return_ACPI_STATUS (AE_TYPE);
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}
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/*
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* Convert the buffer/string to an integer. Note that both buffers and
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* strings are treated as raw data - we don't convert ascii to hex for
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* strings.
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*
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* There are two terminating conditions for the loop:
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* 1) The size of an integer has been reached, or
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* 2) The end of the buffer or string has been reached
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*/
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Result = 0;
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/* String conversion is different than Buffer conversion */
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_STRING:
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/*
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* Convert string to an integer - for most cases, the string must be
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* hexadecimal as per the ACPI specification. The only exception (as
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* of ACPI 3.0) is that the ToInteger() operator allows both decimal
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* and hexadecimal strings (hex prefixed with "0x").
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*/
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Status = AcpiUtStrtoul64 ((char *) Pointer, Flags, &Result);
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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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break;
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case ACPI_TYPE_BUFFER:
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/* Check for zero-length buffer */
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if (!Count)
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{
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return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
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}
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/* Transfer no more than an integer's worth of data */
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if (Count > AcpiGbl_IntegerByteWidth)
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{
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Count = AcpiGbl_IntegerByteWidth;
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}
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/*
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* Convert buffer to an integer - we simply grab enough raw data
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* from the buffer to fill an integer
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*/
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for (i = 0; i < Count; i++)
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{
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/*
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* Get next byte and shift it into the Result.
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* Little endian is used, meaning that the first byte of the buffer
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* is the LSB of the integer
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*/
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Result |= (((UINT64) Pointer[i]) << (i * 8));
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}
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break;
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default:
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/* No other types can get here */
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break;
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}
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/* Create a new integer */
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ReturnDesc = AcpiUtCreateIntegerObject (Result);
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if (!ReturnDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
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ACPI_FORMAT_UINT64 (Result)));
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/* Save the Result */
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(void) AcpiExTruncateFor32bitTable (ReturnDesc);
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*ResultDesc = ReturnDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExConvertToBuffer
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*
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* PARAMETERS: ObjDesc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* ResultDesc - Where the new buffer object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an ACPI Object to a Buffer
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExConvertToBuffer (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **ResultDesc)
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{
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ACPI_OPERAND_OBJECT *ReturnDesc;
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UINT8 *NewBuf;
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ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc);
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_BUFFER:
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/* No conversion necessary */
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*ResultDesc = ObjDesc;
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return_ACPI_STATUS (AE_OK);
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case ACPI_TYPE_INTEGER:
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/*
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* Create a new Buffer object.
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* Need enough space for one integer
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*/
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ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth);
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if (!ReturnDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Copy the integer to the buffer, LSB first */
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NewBuf = ReturnDesc->Buffer.Pointer;
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ACPI_MEMCPY (NewBuf,
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&ObjDesc->Integer.Value,
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AcpiGbl_IntegerByteWidth);
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break;
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case ACPI_TYPE_STRING:
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/*
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* Create a new Buffer object
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* Size will be the string length
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*
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* NOTE: Add one to the string length to include the null terminator.
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* The ACPI spec is unclear on this subject, but there is existing
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* ASL/AML code that depends on the null being transferred to the new
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* buffer.
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*/
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ReturnDesc = AcpiUtCreateBufferObject (
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(ACPI_SIZE) ObjDesc->String.Length + 1);
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if (!ReturnDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Copy the string to the buffer */
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NewBuf = ReturnDesc->Buffer.Pointer;
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ACPI_STRNCPY ((char *) NewBuf, (char *) ObjDesc->String.Pointer,
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ObjDesc->String.Length);
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break;
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default:
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return_ACPI_STATUS (AE_TYPE);
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}
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/* Mark buffer initialized */
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ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID;
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*ResultDesc = ReturnDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExConvertToAscii
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*
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* PARAMETERS: Integer - Value to be converted
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* Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
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* String - Where the string is returned
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* DataWidth - Size of data item to be converted, in bytes
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*
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* RETURN: Actual string length
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*
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* DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
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*
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******************************************************************************/
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static UINT32
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AcpiExConvertToAscii (
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UINT64 Integer,
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UINT16 Base,
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UINT8 *String,
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UINT8 DataWidth)
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{
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UINT64 Digit;
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UINT32 i;
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UINT32 j;
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UINT32 k = 0;
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UINT32 HexLength;
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UINT32 DecimalLength;
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UINT32 Remainder;
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BOOLEAN SupressZeros;
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ACPI_FUNCTION_ENTRY ();
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switch (Base)
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{
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case 10:
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/* Setup max length for the decimal number */
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switch (DataWidth)
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{
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case 1:
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DecimalLength = ACPI_MAX8_DECIMAL_DIGITS;
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break;
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case 4:
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DecimalLength = ACPI_MAX32_DECIMAL_DIGITS;
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break;
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case 8:
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default:
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DecimalLength = ACPI_MAX64_DECIMAL_DIGITS;
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break;
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}
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SupressZeros = TRUE; /* No leading zeros */
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Remainder = 0;
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for (i = DecimalLength; i > 0; i--)
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{
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/* Divide by nth factor of 10 */
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Digit = Integer;
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for (j = 0; j < i; j++)
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{
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(void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder);
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}
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/* Handle leading zeros */
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if (Remainder != 0)
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{
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SupressZeros = FALSE;
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}
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if (!SupressZeros)
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{
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String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
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k++;
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}
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}
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break;
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case 16:
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/* HexLength: 2 ascii hex chars per data byte */
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HexLength = ACPI_MUL_2 (DataWidth);
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for (i = 0, j = (HexLength-1); i < HexLength; i++, j--)
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{
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/* Get one hex digit, most significant digits first */
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String[k] = (UINT8) AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j));
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k++;
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}
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break;
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default:
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return (0);
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}
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/*
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* Since leading zeros are suppressed, we must check for the case where
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* the integer equals 0
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*
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* Finally, null terminate the string and return the length
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*/
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if (!k)
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{
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String [0] = ACPI_ASCII_ZERO;
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k = 1;
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}
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String [k] = 0;
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return ((UINT32) k);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExConvertToString
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*
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* PARAMETERS: ObjDesc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* ResultDesc - Where the string object is returned
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* Type - String flags (base and conversion type)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an ACPI Object to a string
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExConvertToString (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **ResultDesc,
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UINT32 Type)
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{
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ACPI_OPERAND_OBJECT *ReturnDesc;
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UINT8 *NewBuf;
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UINT32 i;
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UINT32 StringLength = 0;
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UINT16 Base = 16;
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UINT8 Separator = ',';
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ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc);
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_STRING:
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/* No conversion necessary */
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*ResultDesc = ObjDesc;
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return_ACPI_STATUS (AE_OK);
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case ACPI_TYPE_INTEGER:
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switch (Type)
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{
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case ACPI_EXPLICIT_CONVERT_DECIMAL:
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/* Make room for maximum decimal number */
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StringLength = ACPI_MAX_DECIMAL_DIGITS;
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Base = 10;
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break;
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default:
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/* Two hex string characters for each integer byte */
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StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth);
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break;
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}
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/*
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* Create a new String
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* Need enough space for one ASCII integer (plus null terminator)
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*/
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ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
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if (!ReturnDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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NewBuf = ReturnDesc->Buffer.Pointer;
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/* Convert integer to string */
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StringLength = AcpiExConvertToAscii (ObjDesc->Integer.Value, Base,
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NewBuf, AcpiGbl_IntegerByteWidth);
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/* Null terminate at the correct place */
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ReturnDesc->String.Length = StringLength;
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NewBuf [StringLength] = 0;
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break;
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case ACPI_TYPE_BUFFER:
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/* Setup string length, base, and separator */
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switch (Type)
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{
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case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */
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/*
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* From ACPI: "If Data is a buffer, it is converted to a string of
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* decimal values separated by commas."
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*/
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Base = 10;
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/*
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* Calculate the final string length. Individual string values
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* are variable length (include separator for each)
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*/
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for (i = 0; i < ObjDesc->Buffer.Length; i++)
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{
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if (ObjDesc->Buffer.Pointer[i] >= 100)
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{
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StringLength += 4;
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}
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else if (ObjDesc->Buffer.Pointer[i] >= 10)
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{
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StringLength += 3;
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}
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else
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{
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StringLength += 2;
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}
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}
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break;
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case ACPI_IMPLICIT_CONVERT_HEX:
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/*
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* From the ACPI spec:
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*"The entire contents of the buffer are converted to a string of
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* two-character hexadecimal numbers, each separated by a space."
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*/
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Separator = ' ';
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StringLength = (ObjDesc->Buffer.Length * 3);
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break;
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case ACPI_EXPLICIT_CONVERT_HEX: /* Used by ToHexString */
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/*
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* From ACPI: "If Data is a buffer, it is converted to a string of
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* hexadecimal values separated by commas."
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*/
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StringLength = (ObjDesc->Buffer.Length * 3);
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break;
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default:
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* Create a new string object and string buffer
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* (-1 because of extra separator included in StringLength from above)
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* Allow creation of zero-length strings from zero-length buffers.
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*/
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if (StringLength)
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{
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StringLength--;
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}
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ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
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if (!ReturnDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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NewBuf = ReturnDesc->Buffer.Pointer;
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/*
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* Convert buffer bytes to hex or decimal values
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* (separated by commas or spaces)
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*/
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for (i = 0; i < ObjDesc->Buffer.Length; i++)
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{
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NewBuf += AcpiExConvertToAscii (
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(UINT64) ObjDesc->Buffer.Pointer[i], Base,
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NewBuf, 1);
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*NewBuf++ = Separator; /* each separated by a comma or space */
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}
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/*
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* Null terminate the string
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* (overwrites final comma/space from above)
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*/
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if (ObjDesc->Buffer.Length)
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{
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NewBuf--;
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}
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*NewBuf = 0;
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break;
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default:
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return_ACPI_STATUS (AE_TYPE);
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}
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*ResultDesc = ReturnDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExConvertToTargetType
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*
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* PARAMETERS: DestinationType - Current type of the destination
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* SourceDesc - Source object to be converted.
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|
* ResultDesc - Where the converted object is returned
|
|
* 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 != SourceDesc->Common.Type)
|
|
{
|
|
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,
|
|
16);
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
/*
|
|
* The operand must be a String. We can convert an
|
|
* Integer or Buffer if necessary
|
|
*/
|
|
Status = AcpiExConvertToString (SourceDesc, ResultDesc,
|
|
ACPI_IMPLICIT_CONVERT_HEX);
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
/*
|
|
* The operand must be a Buffer. We can convert an
|
|
* Integer or String if necessary
|
|
*/
|
|
Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc);
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO, "Bad destination type during conversion: 0x%X",
|
|
DestinationType));
|
|
Status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ARGI_REFERENCE:
|
|
/*
|
|
* CreateXxxxField cases - we are storing the field object into the name
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s",
|
|
GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs),
|
|
WalkState->Opcode, 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);
|
|
}
|