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|
/******************************************************************************
*
* Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2015, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"
#include "amlcode.h"
#include "amlresrc.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exmisc")
/*******************************************************************************
*
* FUNCTION: acpi_ex_get_object_reference
*
* PARAMETERS: obj_desc - Create a reference to this object
* return_desc - Where to store the reference
* walk_state - Current state
*
* RETURN: Status
*
* DESCRIPTION: Obtain and return a "reference" to the target object
* Common code for the ref_of_op and the cond_ref_of_op.
*
******************************************************************************/
acpi_status
acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
union acpi_operand_object **return_desc,
struct acpi_walk_state *walk_state)
{
union acpi_operand_object *reference_obj;
union acpi_operand_object *referenced_obj;
ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc);
*return_desc = NULL;
switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
case ACPI_DESC_TYPE_OPERAND:
if (obj_desc->common.type != ACPI_TYPE_LOCAL_REFERENCE) {
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/*
* Must be a reference to a Local or Arg
*/
switch (obj_desc->reference.class) {
case ACPI_REFCLASS_LOCAL:
case ACPI_REFCLASS_ARG:
case ACPI_REFCLASS_DEBUG:
/* The referenced object is the pseudo-node for the local/arg */
referenced_obj = obj_desc->reference.object;
break;
default:
ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X",
obj_desc->reference.class));
return_ACPI_STATUS(AE_AML_INTERNAL);
}
break;
case ACPI_DESC_TYPE_NAMED:
/*
* A named reference that has already been resolved to a Node
*/
referenced_obj = obj_desc;
break;
default:
ACPI_ERROR((AE_INFO, "Invalid descriptor type 0x%X",
ACPI_GET_DESCRIPTOR_TYPE(obj_desc)));
return_ACPI_STATUS(AE_TYPE);
}
/* Create a new reference object */
reference_obj =
acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
if (!reference_obj) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
reference_obj->reference.class = ACPI_REFCLASS_REFOF;
reference_obj->reference.object = referenced_obj;
*return_desc = reference_obj;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Object %p Type [%s], returning Reference %p\n",
obj_desc, acpi_ut_get_object_type_name(obj_desc),
*return_desc));
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_concat_template
*
* PARAMETERS: operand0 - First source object
* operand1 - Second source object
* actual_return_desc - Where to place the return object
* walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Concatenate two resource templates
*
******************************************************************************/
acpi_status
acpi_ex_concat_template(union acpi_operand_object *operand0,
union acpi_operand_object *operand1,
union acpi_operand_object **actual_return_desc,
struct acpi_walk_state *walk_state)
{
acpi_status status;
union acpi_operand_object *return_desc;
u8 *new_buf;
u8 *end_tag;
acpi_size length0;
acpi_size length1;
acpi_size new_length;
ACPI_FUNCTION_TRACE(ex_concat_template);
/*
* Find the end_tag descriptor in each resource template.
* Note1: returned pointers point TO the end_tag, not past it.
* Note2: zero-length buffers are allowed; treated like one end_tag
*/
/* Get the length of the first resource template */
status = acpi_ut_get_resource_end_tag(operand0, &end_tag);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);
/* Get the length of the second resource template */
status = acpi_ut_get_resource_end_tag(operand1, &end_tag);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer);
/* Combine both lengths, minimum size will be 2 for end_tag */
new_length = length0 + length1 + sizeof(struct aml_resource_end_tag);
/* Create a new buffer object for the result (with one end_tag) */
return_desc = acpi_ut_create_buffer_object(new_length);
if (!return_desc) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/*
* Copy the templates to the new buffer, 0 first, then 1 follows. One
* end_tag descriptor is copied from Operand1.
*/
new_buf = return_desc->buffer.pointer;
memcpy(new_buf, operand0->buffer.pointer, length0);
memcpy(new_buf + length0, operand1->buffer.pointer, length1);
/* Insert end_tag and set the checksum to zero, means "ignore checksum" */
new_buf[new_length - 1] = 0;
new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
/* Return the completed resource template */
*actual_return_desc = return_desc;
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_do_concatenate
*
* PARAMETERS: operand0 - First source object
* operand1 - Second source object
* actual_return_desc - Where to place the return object
* walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
*
******************************************************************************/
acpi_status
acpi_ex_do_concatenate(union acpi_operand_object *operand0,
union acpi_operand_object *operand1,
union acpi_operand_object **actual_return_desc,
struct acpi_walk_state *walk_state)
{
union acpi_operand_object *local_operand1 = operand1;
union acpi_operand_object *return_desc;
char *new_buf;
acpi_status status;
ACPI_FUNCTION_TRACE(ex_do_concatenate);
/*
* Convert the second operand if necessary. The first operand
* determines the type of the second operand, (See the Data Types
* section of the ACPI specification.) Both object types are
* guaranteed to be either Integer/String/Buffer by the operand
* resolution mechanism.
*/
switch (operand0->common.type) {
case ACPI_TYPE_INTEGER:
status =
acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
break;
case ACPI_TYPE_STRING:
status = acpi_ex_convert_to_string(operand1, &local_operand1,
ACPI_IMPLICIT_CONVERT_HEX);
break;
case ACPI_TYPE_BUFFER:
status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
break;
default:
ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X",
operand0->common.type));
status = AE_AML_INTERNAL;
}
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/*
* Both operands are now known to be the same object type
* (Both are Integer, String, or Buffer), and we can now perform the
* concatenation.
*/
/*
* There are three cases to handle:
*
* 1) Two Integers concatenated to produce a new Buffer
* 2) Two Strings concatenated to produce a new String
* 3) Two Buffers concatenated to produce a new Buffer
*/
switch (operand0->common.type) {
case
|