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marcus.erl |
/******************************************************************************
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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 - 2007, R. Byron Moore
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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/acpi.h>
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#include <acpi/acinterp.h>
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#include <acpi/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 u32
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acpi_ex_convert_to_ascii(acpi_integer integer,
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u16 base, u8 * string, u8 max_length);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_convert_to_integer
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*
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* PARAMETERS: obj_desc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* result_desc - 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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acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc,
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union acpi_operand_object **result_desc, u32 flags)
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{
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union acpi_operand_object *return_desc;
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u8 *pointer;
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acpi_integer result;
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u32 i;
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u32 count;
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acpi_status status;
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ACPI_FUNCTION_TRACE_PTR(ex_convert_to_integer, obj_desc);
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switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
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case ACPI_TYPE_INTEGER:
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/* No conversion necessary */
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*result_desc = obj_desc;
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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 = obj_desc->buffer.pointer;
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count = obj_desc->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 (ACPI_GET_OBJECT_TYPE(obj_desc)) {
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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 to_integer() operator allows both decimal
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* and hexadecimal strings (hex prefixed with "0x").
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*/
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status = acpi_ut_strtoul64((char *)pointer, flags, &result);
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if (ACPI_FAILURE(status)) {
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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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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 > acpi_gbl_integer_byte_width) {
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count = acpi_gbl_integer_byte_width;
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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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* 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 |= (((acpi_integer) 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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return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!return_desc) {
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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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return_desc->integer.value = result;
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acpi_ex_truncate_for32bit_table(return_desc);
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*result_desc = return_desc;
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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: acpi_ex_convert_to_buffer
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*
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* PARAMETERS: obj_desc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* result_desc - 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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acpi_ex_convert_to_buffer(union acpi_operand_object *obj_desc,
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union acpi_operand_object **result_desc)
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{
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union acpi_operand_object *return_desc;
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u8 *new_buf;
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ACPI_FUNCTION_TRACE_PTR(ex_convert_to_buffer, obj_desc);
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switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
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case ACPI_TYPE_BUFFER:
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/* No conversion necessary */
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*result_desc = obj_desc;
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return_ACPI_STATUS(AE_OK);
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case ACPI_TYPE_INTEGER:
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| 217 |
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/*
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| 218 |
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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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return_desc =
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acpi_ut_create_buffer_object(acpi_gbl_integer_byte_width);
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if (!return_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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| 227 |
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/* Copy the integer to the buffer, LSB first */
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| 228 |
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new_buf = return_desc->buffer.pointer;
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ACPI_MEMCPY(new_buf,
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&obj_desc->integer.value,
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acpi_gbl_integer_byte_width);
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break;
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| 235 |
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case ACPI_TYPE_STRING:
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| 236 |
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| 237 |
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/*
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| 238 |
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* Create a new Buffer object
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| 239 |
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* Size will be the string length
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| 240 |
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*
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| 241 |
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* NOTE: Add one to the string length to include the null terminator.
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| 242 |
|
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* The ACPI spec is unclear on this subject, but there is existing
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| 243 |
|
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* ASL/AML code that depends on the null being transferred to the new
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| 244 |
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* buffer.
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| 245 |
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*/
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| 246 |
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return_desc = acpi_ut_create_buffer_object((acpi_size)
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| 247 |
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obj_desc->string.
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| 248 |
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length + 1);
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| 249 |
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if (!return_desc) {
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| 250 |
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return_ACPI_STATUS(AE_NO_MEMORY);
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| 251 |
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}
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| 252 |
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| 253 |
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/* Copy the string to the buffer */
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| 254 |
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| 255 |
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new_buf = return_desc->buffer.pointer;
|
| 256 |
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ACPI_STRNCPY((char *)new_buf, (char *)obj_desc->string.pointer,
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| 257 |
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obj_desc->string.length);
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| 258 |
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break;
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| 259 |
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| 260 |
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default:
|
| 261 |
|
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return_ACPI_STATUS(AE_TYPE);
|
| 262 |
|
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}
|
| 263 |
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|
|
| 264 |
|
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/* Mark buffer initialized */
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| 265 |
|
|
|
| 266 |
|
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return_desc->common.flags |= AOPOBJ_DATA_VALID;
|
| 267 |
|
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*result_desc = return_desc;
|
| 268 |
|
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return_ACPI_STATUS(AE_OK);
|
| 269 |
|
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}
|
| 270 |
|
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|
| 271 |
|
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/*******************************************************************************
|
| 272 |
|
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*
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| 273 |
|
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* FUNCTION: acpi_ex_convert_to_ascii
|
| 274 |
|
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*
|
| 275 |
|
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* PARAMETERS: Integer - Value to be converted
|
| 276 |
|
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* Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
|
| 277 |
|
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* String - Where the string is returned
|
| 278 |
|
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* data_width - Size of data item to be converted, in bytes
|
| 279 |
|
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*
|
| 280 |
|
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* RETURN: Actual string length
|
| 281 |
|
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*
|
| 282 |
|
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* DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
|
| 283 |
|
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*
|
| 284 |
|
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******************************************************************************/
|
| 285 |
|
|
|
| 286 |
|
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static u32
|
| 287 |
|
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acpi_ex_convert_to_ascii(acpi_integer integer,
|
| 288 |
|
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u16 base, u8 * string, u8 data_width)
|
| 289 |
|
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{
|
| 290 |
|
|
acpi_integer digit;
|
| 291 |
|
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acpi_native_uint i;
|
| 292 |
|
|
acpi_native_uint j;
|
| 293 |
|
|
acpi_native_uint k = 0;
|
| 294 |
|
|
acpi_native_uint hex_length;
|
| 295 |
|
|
acpi_native_uint decimal_length;
|
| 296 |
|
|
u32 remainder;
|
| 297 |
|
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u8 supress_zeros;
|
| 298 |
|
|
|
| 299 |
|
|
ACPI_FUNCTION_ENTRY();
|
| 300 |
|
|
|
| 301 |
|
|
switch (base) {
|
| 302 |
|
|
case 10:
|
| 303 |
|
|
|
| 304 |
|
|
/* Setup max length for the decimal number */
|
| 305 |
|
|
|
| 306 |
|
|
switch (data_width) {
|
| 307 |
|
|
case 1:
|
| 308 |
|
|
decimal_length = ACPI_MAX8_DECIMAL_DIGITS;
|
| 309 |
|
|
break;
|
| 310 |
|
|
|
| 311 |
|
|
case 4:
|
| 312 |
|
|
decimal_length = ACPI_MAX32_DECIMAL_DIGITS;
|
| 313 |
|
|
break;
|
| 314 |
|
|
|
| 315 |
|
|
case 8:
|
| 316 |
|
|
default:
|
| 317 |
|
|
decimal_length = ACPI_MAX64_DECIMAL_DIGITS;
|
| 318 |
|
|
break;
|
| 319 |
|
|
}
|
| 320 |
|
|
|
| 321 |
|
|
supress_zeros = TRUE; /* No leading zeros */
|
| 322 |
|
|
remainder = 0;
|
| 323 |
|
|
|
| 324 |
|
|
for (i = decimal_length; i > 0; i--) {
|
| 325 |
|
|
|
| 326 |
|
|
/* Divide by nth factor of 10 */
|
| 327 |
|
|
|
| 328 |
|
|
digit = integer;
|
| 329 |
|
|
for (j = 0; j < i; j++) {
|
| 330 |
|
|
(void)acpi_ut_short_divide(digit, 10, &digit,
|
| 331 |
|
|
&remainder);
|
| 332 |
|
|
}
|
| 333 |
|
|
|
| 334 |
|
|
/* Handle leading zeros */
|
| 335 |
|
|
|
| 336 |
|
|
if (remainder != 0) {
|
| 337 |
|
|
supress_zeros = FALSE;
|
| 338 |
|
|
}
|
| 339 |
|
|
|
| 340 |
|
|
if (!supress_zeros) {
|
| 341 |
|
|
string[k] = (u8) (ACPI_ASCII_ZERO + remainder);
|
| 342 |
|
|
k++;
|
| 343 |
|
|
}
|
| 344 |
|
|
}
|
| 345 |
|
|
break;
|
| 346 |
|
|
|
| 347 |
|
|
case 16:
|
| 348 |
|
|
|
| 349 |
|
|
/* hex_length: 2 ascii hex chars per data byte */
|
| 350 |
|
|
|
| 351 |
|
|
hex_length = (acpi_native_uint) ACPI_MUL_2(data_width);
|
| 352 |
|
|
for (i = 0, j = (hex_length - 1); i < hex_length; i++, j--) {
|
| 353 |
|
|
|
| 354 |
|
|
/* Get one hex digit, most significant digits first */
|
| 355 |
|
|
|
| 356 |
|
|
string[k] =
|
| 357 |
|
|
(u8) acpi_ut_hex_to_ascii_char(integer,
|
| 358 |
|
|
ACPI_MUL_4(j));
|
| 359 |
|
|
k++;
|
| 360 |
|
|
}
|
| 361 |
|
|
break;
|
| 362 |
|
|
|
| 363 |
|
|
default:
|
| 364 |
|
|
return (0);
|
| 365 |
|
|
}
|
| 366 |
|
|
|
| 367 |
|
|
/*
|
| 368 |
|
|
* Since leading zeros are supressed, we must check for the case where
|
| 369 |
|
|
* the integer equals 0
|
| 370 |
|
|
*
|
| 371 |
|
|
* Finally, null terminate the string and return the length
|
| 372 |
|
|
*/
|
| 373 |
|
|
if (!k) {
|
| 374 |
|
|
string[0] = ACPI_ASCII_ZERO;
|
| 375 |
|
|
k = 1;
|
| 376 |
|
|
}
|
| 377 |
|
|
|
| 378 |
|
|
string[k] = 0;
|
| 379 |
|
|
return ((u32) k);
|
| 380 |
|
|
}
|
| 381 |
|
|
|
| 382 |
|
|
/*******************************************************************************
|
| 383 |
|
|
*
|
| 384 |
|
|
* FUNCTION: acpi_ex_convert_to_string
|
| 385 |
|
|
*
|
| 386 |
|
|
* PARAMETERS: obj_desc - Object to be converted. Must be an
|
| 387 |
|
|
* Integer, Buffer, or String
|
| 388 |
|
|
* result_desc - Where the string object is returned
|
| 389 |
|
|
* Type - String flags (base and conversion type)
|
| 390 |
|
|
*
|
| 391 |
|
|
* RETURN: Status
|
| 392 |
|
|
*
|
| 393 |
|
|
* DESCRIPTION: Convert an ACPI Object to a string
|
| 394 |
|
|
*
|
| 395 |
|
|
******************************************************************************/
|
| 396 |
|
|
|
| 397 |
|
|
acpi_status
|
| 398 |
|
|
acpi_ex_convert_to_string(union acpi_operand_object * obj_desc,
|
| 399 |
|
|
union acpi_operand_object ** result_desc, u32 type)
|
| 400 |
|
|
{
|
| 401 |
|
|
union acpi_operand_object *return_desc;
|
| 402 |
|
|
u8 *new_buf;
|
| 403 |
|
|
u32 i;
|
| 404 |
|
|
u32 string_length = 0;
|
| 405 |
|
|
u16 base = 16;
|
| 406 |
|
|
u8 separator = ',';
|
| 407 |
|
|
|
| 408 |
|
|
ACPI_FUNCTION_TRACE_PTR(ex_convert_to_string, obj_desc);
|
| 409 |
|
|
|
| 410 |
|
|
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
|
| 411 |
|
|
case ACPI_TYPE_STRING:
|
| 412 |
|
|
|
| 413 |
|
|
/* No conversion necessary */
|
| 414 |
|
|
|
| 415 |
|
|
*result_desc = obj_desc;
|
| 416 |
|
|
return_ACPI_STATUS(AE_OK);
|
| 417 |
|
|
|
| 418 |
|
|
case ACPI_TYPE_INTEGER:
|
| 419 |
|
|
|
| 420 |
|
|
switch (type) {
|
| 421 |
|
|
case ACPI_EXPLICIT_CONVERT_DECIMAL:
|
| 422 |
|
|
|
| 423 |
|
|
/* Make room for maximum decimal number */
|
| 424 |
|
|
|
| 425 |
|
|
string_length = ACPI_MAX_DECIMAL_DIGITS;
|
| 426 |
|
|
base = 10;
|
| 427 |
|
|
break;
|
| 428 |
|
|
|
| 429 |
|
|
default:
|
| 430 |
|
|
|
| 431 |
|
|
/* Two hex string characters for each integer byte */
|
| 432 |
|
|
|
| 433 |
|
|
string_length = ACPI_MUL_2(acpi_gbl_integer_byte_width);
|
| 434 |
|
|
break;
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
/*
|
| 438 |
|
|
* Create a new String
|
| 439 |
|
|
* Need enough space for one ASCII integer (plus null terminator)
|
| 440 |
|
|
*/
|
| 441 |
|
|
return_desc =
|
| 442 |
|
|
acpi_ut_create_string_object((acpi_size) string_length);
|
| 443 |
|
|
if (!return_desc) {
|
| 444 |
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
| 445 |
|
|
}
|
| 446 |
|
|
|
| 447 |
|
|
new_buf = return_desc->buffer.pointer;
|
| 448 |
|
|
|
| 449 |
|
|
/* Convert integer to string */
|
| 450 |
|
|
|
| 451 |
|
|
string_length =
|
| 452 |
|
|
acpi_ex_convert_to_ascii(obj_desc->integer.value, base,
|
| 453 |
|
|
new_buf,
|
| 454 |
|
|
acpi_gbl_integer_byte_width);
|
| 455 |
|
|
|
| 456 |
|
|
/* Null terminate at the correct place */
|
| 457 |
|
|
|
| 458 |
|
|
return_desc->string.length = string_length;
|
| 459 |
|
|
new_buf[string_length] = 0;
|
| 460 |
|
|
break;
|
| 461 |
|
|
|
| 462 |
|
|
case ACPI_TYPE_BUFFER:
|
| 463 |
|
|
|
| 464 |
|
|
/* Setup string length, base, and separator */
|
| 465 |
|
|
|
| 466 |
|
|
switch (type) {
|
| 467 |
|
|
case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by to_decimal_string */
|
| 468 |
|
|
/*
|
| 469 |
|
|
* From ACPI: "If Data is a buffer, it is converted to a string of
|
| 470 |
|
|
* decimal values separated by commas."
|
| 471 |
|
|
*/
|
| 472 |
|
|
base = 10;
|
| 473 |
|
|
|
| 474 |
|
|
/*
|
| 475 |
|
|
* Calculate the final string length. Individual string values
|
| 476 |
|
|
* are variable length (include separator for each)
|
| 477 |
|
|
*/
|
| 478 |
|
|
for (i = 0; i < obj_desc->buffer.length; i++) {
|
| 479 |
|
|
if (obj_desc->buffer.pointer[i] >= 100) {
|
| 480 |
|
|
string_length += 4;
|
| 481 |
|
|
} else if (obj_desc->buffer.pointer[i] >= 10) {
|
| 482 |
|
|
string_length += 3;
|
| 483 |
|
|
} else {
|
| 484 |
|
|
string_length += 2;
|
| 485 |
|
|
}
|
| 486 |
|
|
}
|
| 487 |
|
|
break;
|
| 488 |
|
|
|
| 489 |
|
|
case ACPI_IMPLICIT_CONVERT_HEX:
|
| 490 |
|
|
/*
|
| 491 |
|
|
* From the ACPI spec:
|
| 492 |
|
|
*"The entire contents of the buffer are converted to a string of
|
| 493 |
|
|
* two-character hexadecimal numbers, each separated by a space."
|
| 494 |
|
|
*/
|
| 495 |
|
|
separator = ' ';
|
| 496 |
|
|
string_length = (obj_desc->buffer.length * 3);
|
| 497 |
|
|
break;
|
| 498 |
|
|
|
| 499 |
|
|
case ACPI_EXPLICIT_CONVERT_HEX: /* Used by to_hex_string */
|
| 500 |
|
|
/*
|
| 501 |
|
|
* From ACPI: "If Data is a buffer, it is converted to a string of
|
| 502 |
|
|
* hexadecimal values separated by commas."
|
| 503 |
|
|
*/
|
| 504 |
|
|
string_length = (obj_desc->buffer.length * 3);
|
| 505 |
|
|
break;
|
| 506 |
|
|
|
| 507 |
|
|
default:
|
| 508 |
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
| 509 |
|
|
}
|
| 510 |
|
|
|
| 511 |
|
|
/*
|
| 512 |
|
|
* Create a new string object and string buffer
|
| 513 |
|
|
* (-1 because of extra separator included in string_length from above)
|
| 514 |
|
|
*/
|
| 515 |
|
|
return_desc = acpi_ut_create_string_object((acpi_size)
|
| 516 |
|
|
(string_length - 1));
|
| 517 |
|
|
if (!return_desc) {
|
| 518 |
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
| 519 |
|
|
}
|
| 520 |
|
|
|
| 521 |
|
|
new_buf = return_desc->buffer.pointer;
|
| 522 |
|
|
|
| 523 |
|
|
/*
|
| 524 |
|
|
* Convert buffer bytes to hex or decimal values
|
| 525 |
|
|
* (separated by commas or spaces)
|
| 526 |
|
|
*/
|
| 527 |
|
|
for (i = 0; i < obj_desc->buffer.length; i++) {
|
| 528 |
|
|
new_buf += acpi_ex_convert_to_ascii((acpi_integer)
|
| 529 |
|
|
obj_desc->buffer.
|
| 530 |
|
|
pointer[i], base,
|
| 531 |
|
|
new_buf, 1);
|
| 532 |
|
|
*new_buf++ = separator; /* each separated by a comma or space */
|
| 533 |
|
|
}
|
| 534 |
|
|
|
| 535 |
|
|
/*
|
| 536 |
|
|
* Null terminate the string
|
| 537 |
|
|
* (overwrites final comma/space from above)
|
| 538 |
|
|
*/
|
| 539 |
|
|
new_buf--;
|
| 540 |
|
|
*new_buf = 0;
|
| 541 |
|
|
break;
|
| 542 |
|
|
|
| 543 |
|
|
default:
|
| 544 |
|
|
return_ACPI_STATUS(AE_TYPE);
|
| 545 |
|
|
}
|
| 546 |
|
|
|
| 547 |
|
|
*result_desc = return_desc;
|
| 548 |
|
|
return_ACPI_STATUS(AE_OK);
|
| 549 |
|
|
}
|
| 550 |
|
|
|
| 551 |
|
|
/*******************************************************************************
|
| 552 |
|
|
*
|
| 553 |
|
|
* FUNCTION: acpi_ex_convert_to_target_type
|
| 554 |
|
|
*
|
| 555 |
|
|
* PARAMETERS: destination_type - Current type of the destination
|
| 556 |
|
|
* source_desc - Source object to be converted.
|
| 557 |
|
|
* result_desc - Where the converted object is returned
|
| 558 |
|
|
* walk_state - Current method state
|
| 559 |
|
|
*
|
| 560 |
|
|
* RETURN: Status
|
| 561 |
|
|
*
|
| 562 |
|
|
* DESCRIPTION: Implements "implicit conversion" rules for storing an object.
|
| 563 |
|
|
*
|
| 564 |
|
|
******************************************************************************/
|
| 565 |
|
|
|
| 566 |
|
|
acpi_status
|
| 567 |
|
|
acpi_ex_convert_to_target_type(acpi_object_type destination_type,
|
| 568 |
|
|
union acpi_operand_object *source_desc,
|
| 569 |
|
|
union acpi_operand_object **result_desc,
|
| 570 |
|
|
struct acpi_walk_state *walk_state)
|
| 571 |
|
|
{
|
| 572 |
|
|
acpi_status status = AE_OK;
|
| 573 |
|
|
|
| 574 |
|
|
ACPI_FUNCTION_TRACE(ex_convert_to_target_type);
|
| 575 |
|
|
|
| 576 |
|
|
/* Default behavior */
|
| 577 |
|
|
|
| 578 |
|
|
*result_desc = source_desc;
|
| 579 |
|
|
|
| 580 |
|
|
/*
|
| 581 |
|
|
* If required by the target,
|
| 582 |
|
|
* perform implicit conversion on the source before we store it.
|
| 583 |
|
|
*/
|
| 584 |
|
|
switch (GET_CURRENT_ARG_TYPE(walk_state->op_info->runtime_args)) {
|
| 585 |
|
|
case ARGI_SIMPLE_TARGET:
|
| 586 |
|
|
case ARGI_FIXED_TARGET:
|
| 587 |
|
|
case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */
|
| 588 |
|
|
|
| 589 |
|
|
switch (destination_type) {
|
| 590 |
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
| 591 |
|
|
/*
|
| 592 |
|
|
* Named field can always handle conversions
|
| 593 |
|
|
*/
|
| 594 |
|
|
break;
|
| 595 |
|
|
|
| 596 |
|
|
default:
|
| 597 |
|
|
/* No conversion allowed for these types */
|
| 598 |
|
|
|
| 599 |
|
|
if (destination_type !=
|
| 600 |
|
|
ACPI_GET_OBJECT_TYPE(source_desc)) {
|
| 601 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
| 602 |
|
|
"Explicit operator, will store (%s) over existing type (%s)\n",
|
| 603 |
|
|
acpi_ut_get_object_type_name
|
| 604 |
|
|
(source_desc),
|
| 605 |
|
|
acpi_ut_get_type_name
|
| 606 |
|
|
(destination_type)));
|
| 607 |
|
|
status = AE_TYPE;
|
| 608 |
|
|
}
|
| 609 |
|
|
}
|
| 610 |
|
|
break;
|
| 611 |
|
|
|
| 612 |
|
|
case ARGI_TARGETREF:
|
| 613 |
|
|
|
| 614 |
|
|
switch (destination_type) {
|
| 615 |
|
|
case ACPI_TYPE_INTEGER:
|
| 616 |
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
| 617 |
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
| 618 |
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
| 619 |
|
|
/*
|
| 620 |
|
|
* These types require an Integer operand. We can convert
|
| 621 |
|
|
* a Buffer or a String to an Integer if necessary.
|
| 622 |
|
|
*/
|
| 623 |
|
|
status =
|
| 624 |
|
|
acpi_ex_convert_to_integer(source_desc, result_desc,
|
| 625 |
|
|
16);
|
| 626 |
|
|
break;
|
| 627 |
|
|
|
| 628 |
|
|
case ACPI_TYPE_STRING:
|
| 629 |
|
|
/*
|
| 630 |
|
|
* The operand must be a String. We can convert an
|
| 631 |
|
|
* Integer or Buffer if necessary
|
| 632 |
|
|
*/
|
| 633 |
|
|
status =
|
| 634 |
|
|
acpi_ex_convert_to_string(source_desc, result_desc,
|
| 635 |
|
|
ACPI_IMPLICIT_CONVERT_HEX);
|
| 636 |
|
|
break;
|
| 637 |
|
|
|
| 638 |
|
|
case ACPI_TYPE_BUFFER:
|
| 639 |
|
|
/*
|
| 640 |
|
|
* The operand must be a Buffer. We can convert an
|
| 641 |
|
|
* Integer or String if necessary
|
| 642 |
|
|
*/
|
| 643 |
|
|
status =
|
| 644 |
|
|
acpi_ex_convert_to_buffer(source_desc, result_desc);
|
| 645 |
|
|
break;
|
| 646 |
|
|
|
| 647 |
|
|
default:
|
| 648 |
|
|
ACPI_ERROR((AE_INFO,
|
| 649 |
|
|
"Bad destination type during conversion: %X",
|
| 650 |
|
|
destination_type));
|
| 651 |
|
|
status = AE_AML_INTERNAL;
|
| 652 |
|
|
break;
|
| 653 |
|
|
}
|
| 654 |
|
|
break;
|
| 655 |
|
|
|
| 656 |
|
|
case ARGI_REFERENCE:
|
| 657 |
|
|
/*
|
| 658 |
|
|
* create_xxxx_field cases - we are storing the field object into the name
|
| 659 |
|
|
*/
|
| 660 |
|
|
break;
|
| 661 |
|
|
|
| 662 |
|
|
default:
|
| 663 |
|
|
ACPI_ERROR((AE_INFO,
|
| 664 |
|
|
"Unknown Target type ID 0x%X AmlOpcode %X DestType %s",
|
| 665 |
|
|
GET_CURRENT_ARG_TYPE(walk_state->op_info->
|
| 666 |
|
|
runtime_args),
|
| 667 |
|
|
walk_state->opcode,
|
| 668 |
|
|
acpi_ut_get_type_name(destination_type)));
|
| 669 |
|
|
status = AE_AML_INTERNAL;
|
| 670 |
|
|
}
|
| 671 |
|
|
|
| 672 |
|
|
/*
|
| 673 |
|
|
* Source-to-Target conversion semantics:
|
| 674 |
|
|
*
|
| 675 |
|
|
* If conversion to the target type cannot be performed, then simply
|
| 676 |
|
|
* overwrite the target with the new object and type.
|
| 677 |
|
|
*/
|
| 678 |
|
|
if (status == AE_TYPE) {
|
| 679 |
|
|
status = AE_OK;
|
| 680 |
|
|
}
|
| 681 |
|
|
|
| 682 |
|
|
return_ACPI_STATUS(status);
|
| 683 |
|
|
}
|
