726 lines
20 KiB
C
726 lines
20 KiB
C
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/******************************************************************************
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*
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* Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, 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/acpi.h>
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#include <acpi/acinterp.h>
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#include <acpi/amlcode.h>
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#include <acpi/amlresrc.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exmisc")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_get_object_reference
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*
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* PARAMETERS: obj_desc - Create a reference to this object
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* return_desc - Where to store the reference
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Obtain and return a "reference" to the target object
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* Common code for the ref_of_op and the cond_ref_of_op.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_desc,
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *reference_obj;
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union acpi_operand_object *referenced_obj;
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ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc);
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*return_desc = NULL;
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switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
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case ACPI_DESC_TYPE_OPERAND:
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if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_LOCAL_REFERENCE) {
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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/*
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* Must be a reference to a Local or Arg
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*/
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switch (obj_desc->reference.opcode) {
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case AML_LOCAL_OP:
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case AML_ARG_OP:
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case AML_DEBUG_OP:
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/* The referenced object is the pseudo-node for the local/arg */
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referenced_obj = obj_desc->reference.object;
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown Reference opcode %X",
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obj_desc->reference.opcode));
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return_ACPI_STATUS(AE_AML_INTERNAL);
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}
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break;
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case ACPI_DESC_TYPE_NAMED:
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/*
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* A named reference that has already been resolved to a Node
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*/
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referenced_obj = obj_desc;
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break;
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default:
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ACPI_ERROR((AE_INFO, "Invalid descriptor type %X",
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ACPI_GET_DESCRIPTOR_TYPE(obj_desc)));
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return_ACPI_STATUS(AE_TYPE);
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}
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/* Create a new reference object */
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reference_obj =
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acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
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if (!reference_obj) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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reference_obj->reference.opcode = AML_REF_OF_OP;
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reference_obj->reference.object = referenced_obj;
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*return_desc = reference_obj;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Object %p Type [%s], returning Reference %p\n",
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obj_desc, acpi_ut_get_object_type_name(obj_desc),
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*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_concat_template
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*
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* PARAMETERS: Operand0 - First source object
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* Operand1 - Second source object
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* actual_return_desc - Where to place the return object
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* walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Concatenate two resource templates
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*
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******************************************************************************/
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acpi_status
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acpi_ex_concat_template(union acpi_operand_object *operand0,
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union acpi_operand_object *operand1,
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union acpi_operand_object **actual_return_desc,
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struct acpi_walk_state *walk_state)
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{
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acpi_status status;
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union acpi_operand_object *return_desc;
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u8 *new_buf;
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u8 *end_tag;
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acpi_size length0;
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acpi_size length1;
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acpi_size new_length;
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ACPI_FUNCTION_TRACE(ex_concat_template);
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/*
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* Find the end_tag descriptor in each resource template.
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* Note1: returned pointers point TO the end_tag, not past it.
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* Note2: zero-length buffers are allowed; treated like one end_tag
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*/
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/* Get the length of the first resource template */
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status = acpi_ut_get_resource_end_tag(operand0, &end_tag);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);
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/* Get the length of the second resource template */
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status = acpi_ut_get_resource_end_tag(operand1, &end_tag);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer);
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/* Combine both lengths, minimum size will be 2 for end_tag */
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new_length = length0 + length1 + sizeof(struct aml_resource_end_tag);
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/* Create a new buffer object for the result (with one end_tag) */
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return_desc = acpi_ut_create_buffer_object(new_length);
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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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/*
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* Copy the templates to the new buffer, 0 first, then 1 follows. One
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* end_tag descriptor is copied from Operand1.
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*/
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new_buf = return_desc->buffer.pointer;
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ACPI_MEMCPY(new_buf, operand0->buffer.pointer, length0);
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ACPI_MEMCPY(new_buf + length0, operand1->buffer.pointer, length1);
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/* Insert end_tag and set the checksum to zero, means "ignore checksum" */
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new_buf[new_length - 1] = 0;
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new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
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/* Return the completed resource template */
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*actual_return_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_do_concatenate
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*
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* PARAMETERS: Operand0 - First source object
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* Operand1 - Second source object
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* actual_return_desc - Where to place the return object
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* walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_do_concatenate(union acpi_operand_object *operand0,
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union acpi_operand_object *operand1,
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union acpi_operand_object **actual_return_desc,
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *local_operand1 = operand1;
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union acpi_operand_object *return_desc;
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char *new_buf;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ex_do_concatenate);
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/*
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* Convert the second operand if necessary. The first operand
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* determines the type of the second operand, (See the Data Types
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* section of the ACPI specification.) Both object types are
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* guaranteed to be either Integer/String/Buffer by the operand
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* resolution mechanism.
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*/
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switch (ACPI_GET_OBJECT_TYPE(operand0)) {
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case ACPI_TYPE_INTEGER:
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status =
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acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
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break;
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case ACPI_TYPE_STRING:
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status = acpi_ex_convert_to_string(operand1, &local_operand1,
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ACPI_IMPLICIT_CONVERT_HEX);
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break;
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case ACPI_TYPE_BUFFER:
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status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
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break;
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default:
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ACPI_ERROR((AE_INFO, "Invalid object type: %X",
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ACPI_GET_OBJECT_TYPE(operand0)));
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status = AE_AML_INTERNAL;
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}
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/*
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* Both operands are now known to be the same object type
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* (Both are Integer, String, or Buffer), and we can now perform the
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* concatenation.
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*/
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/*
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* There are three cases to handle:
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*
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* 1) Two Integers concatenated to produce a new Buffer
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* 2) Two Strings concatenated to produce a new String
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* 3) Two Buffers concatenated to produce a new Buffer
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*/
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switch (ACPI_GET_OBJECT_TYPE(operand0)) {
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case ACPI_TYPE_INTEGER:
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/* Result of two Integers is a Buffer */
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/* Need enough buffer space for two integers */
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return_desc = acpi_ut_create_buffer_object((acpi_size)
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ACPI_MUL_2
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(acpi_gbl_integer_byte_width));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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new_buf = (char *)return_desc->buffer.pointer;
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/* Copy the first integer, LSB first */
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ACPI_MEMCPY(new_buf, &operand0->integer.value,
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acpi_gbl_integer_byte_width);
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/* Copy the second integer (LSB first) after the first */
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ACPI_MEMCPY(new_buf + acpi_gbl_integer_byte_width,
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&local_operand1->integer.value,
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acpi_gbl_integer_byte_width);
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break;
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case ACPI_TYPE_STRING:
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/* Result of two Strings is a String */
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return_desc = acpi_ut_create_string_object((acpi_size)
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(operand0->string.
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length +
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local_operand1->
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string.length));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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new_buf = return_desc->string.pointer;
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/* Concatenate the strings */
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ACPI_STRCPY(new_buf, operand0->string.pointer);
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ACPI_STRCPY(new_buf + operand0->string.length,
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local_operand1->string.pointer);
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break;
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case ACPI_TYPE_BUFFER:
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/* Result of two Buffers is a Buffer */
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return_desc = acpi_ut_create_buffer_object((acpi_size)
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(operand0->buffer.
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length +
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local_operand1->
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buffer.length));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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new_buf = (char *)return_desc->buffer.pointer;
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/* Concatenate the buffers */
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ACPI_MEMCPY(new_buf, operand0->buffer.pointer,
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operand0->buffer.length);
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ACPI_MEMCPY(new_buf + operand0->buffer.length,
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local_operand1->buffer.pointer,
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local_operand1->buffer.length);
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break;
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default:
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/* Invalid object type, should not happen here */
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ACPI_ERROR((AE_INFO, "Invalid object type: %X",
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ACPI_GET_OBJECT_TYPE(operand0)));
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status = AE_AML_INTERNAL;
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goto cleanup;
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}
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*actual_return_desc = return_desc;
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cleanup:
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if (local_operand1 != operand1) {
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acpi_ut_remove_reference(local_operand1);
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_do_math_op
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*
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* PARAMETERS: Opcode - AML opcode
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* Integer0 - Integer operand #0
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* Integer1 - Integer operand #1
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*
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* RETURN: Integer result of the operation
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*
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* DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
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* math functions here is to prevent a lot of pointer dereferencing
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* to obtain the operands.
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*
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******************************************************************************/
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acpi_integer
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acpi_ex_do_math_op(u16 opcode, acpi_integer integer0, acpi_integer integer1)
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{
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ACPI_FUNCTION_ENTRY();
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switch (opcode) {
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case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */
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return (integer0 + integer1);
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case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */
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return (integer0 & integer1);
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case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */
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return (~(integer0 & integer1));
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case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */
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return (integer0 | integer1);
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case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */
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return (~(integer0 | integer1));
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case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */
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return (integer0 ^ integer1);
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case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */
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return (integer0 * integer1);
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case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */
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/*
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* We need to check if the shiftcount is larger than the integer bit
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* width since the behavior of this is not well-defined in the C language.
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*/
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if (integer1 >= acpi_gbl_integer_bit_width) {
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return (0);
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}
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return (integer0 << integer1);
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case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, Result) */
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/*
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* We need to check if the shiftcount is larger than the integer bit
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* width since the behavior of this is not well-defined in the C language.
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*/
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if (integer1 >= acpi_gbl_integer_bit_width) {
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return (0);
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}
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return (integer0 >> integer1);
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case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */
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return (integer0 - integer1);
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default:
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return (0);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_do_logical_numeric_op
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*
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* PARAMETERS: Opcode - AML opcode
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* Integer0 - Integer operand #0
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* Integer1 - Integer operand #1
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* logical_result - TRUE/FALSE result of the operation
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric
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* operators (LAnd and LOr), both operands must be integers.
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*
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* Note: cleanest machine code seems to be produced by the code
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* below, rather than using statements of the form:
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* Result = (Integer0 && Integer1);
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*
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******************************************************************************/
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acpi_status
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acpi_ex_do_logical_numeric_op(u16 opcode,
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acpi_integer integer0,
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acpi_integer integer1, u8 * logical_result)
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{
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acpi_status status = AE_OK;
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u8 local_result = FALSE;
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ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op);
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switch (opcode) {
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case AML_LAND_OP: /* LAnd (Integer0, Integer1) */
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if (integer0 && integer1) {
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local_result = TRUE;
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}
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break;
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case AML_LOR_OP: /* LOr (Integer0, Integer1) */
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if (integer0 || integer1) {
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local_result = TRUE;
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}
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break;
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default:
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status = AE_AML_INTERNAL;
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break;
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}
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/* Return the logical result and status */
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*logical_result = local_result;
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_do_logical_op
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*
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* PARAMETERS: Opcode - AML opcode
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* Operand0 - operand #0
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* Operand1 - operand #1
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* logical_result - TRUE/FALSE result of the operation
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
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* functions here is to prevent a lot of pointer dereferencing
|
|
* to obtain the operands and to simplify the generation of the
|
|
* logical value. For the Numeric operators (LAnd and LOr), both
|
|
* operands must be integers. For the other logical operators,
|
|
* operands can be any combination of Integer/String/Buffer. The
|
|
* first operand determines the type to which the second operand
|
|
* will be converted.
|
|
*
|
|
* Note: cleanest machine code seems to be produced by the code
|
|
* below, rather than using statements of the form:
|
|
* Result = (Operand0 == Operand1);
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ex_do_logical_op(u16 opcode,
|
|
union acpi_operand_object *operand0,
|
|
union acpi_operand_object *operand1, u8 * logical_result)
|
|
{
|
|
union acpi_operand_object *local_operand1 = operand1;
|
|
acpi_integer integer0;
|
|
acpi_integer integer1;
|
|
u32 length0;
|
|
u32 length1;
|
|
acpi_status status = AE_OK;
|
|
u8 local_result = FALSE;
|
|
int compare;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_do_logical_op);
|
|
|
|
/*
|
|
* Convert the second operand if necessary. The first operand
|
|
* determines the type of the second operand, (See the Data Types
|
|
* section of the ACPI 3.0+ specification.) Both object types are
|
|
* guaranteed to be either Integer/String/Buffer by the operand
|
|
* resolution mechanism.
|
|
*/
|
|
switch (ACPI_GET_OBJECT_TYPE(operand0)) {
|
|
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:
|
|
status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Two cases: 1) Both Integers, 2) Both Strings or Buffers
|
|
*/
|
|
if (ACPI_GET_OBJECT_TYPE(operand0) == ACPI_TYPE_INTEGER) {
|
|
/*
|
|
* 1) Both operands are of type integer
|
|
* Note: local_operand1 may have changed above
|
|
*/
|
|
integer0 = operand0->integer.value;
|
|
integer1 = local_operand1->integer.value;
|
|
|
|
switch (opcode) {
|
|
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
|
|
|
|
if (integer0 == integer1) {
|
|
local_result = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
|
|
|
|
if (integer0 > integer1) {
|
|
local_result = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
|
|
|
|
if (integer0 < integer1) {
|
|
local_result = TRUE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* 2) Both operands are Strings or both are Buffers
|
|
* Note: Code below takes advantage of common Buffer/String
|
|
* object fields. local_operand1 may have changed above. Use
|
|
* memcmp to handle nulls in buffers.
|
|
*/
|
|
length0 = operand0->buffer.length;
|
|
length1 = local_operand1->buffer.length;
|
|
|
|
/* Lexicographic compare: compare the data bytes */
|
|
|
|
compare = ACPI_MEMCMP(operand0->buffer.pointer,
|
|
local_operand1->buffer.pointer,
|
|
(length0 > length1) ? length1 : length0);
|
|
|
|
switch (opcode) {
|
|
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
|
|
|
|
/* Length and all bytes must be equal */
|
|
|
|
if ((length0 == length1) && (compare == 0)) {
|
|
|
|
/* Length and all bytes match ==> TRUE */
|
|
|
|
local_result = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
|
|
|
|
if (compare > 0) {
|
|
local_result = TRUE;
|
|
goto cleanup; /* TRUE */
|
|
}
|
|
if (compare < 0) {
|
|
goto cleanup; /* FALSE */
|
|
}
|
|
|
|
/* Bytes match (to shortest length), compare lengths */
|
|
|
|
if (length0 > length1) {
|
|
local_result = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
|
|
|
|
if (compare > 0) {
|
|
goto cleanup; /* FALSE */
|
|
}
|
|
if (compare < 0) {
|
|
local_result = TRUE;
|
|
goto cleanup; /* TRUE */
|
|
}
|
|
|
|
/* Bytes match (to shortest length), compare lengths */
|
|
|
|
if (length0 < length1) {
|
|
local_result = TRUE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
|
|
/* New object was created if implicit conversion performed - delete */
|
|
|
|
if (local_operand1 != operand1) {
|
|
acpi_ut_remove_reference(local_operand1);
|
|
}
|
|
|
|
/* Return the logical result and status */
|
|
|
|
*logical_result = local_result;
|
|
return_ACPI_STATUS(status);
|
|
}
|