288 lines
7.9 KiB
C
288 lines
7.9 KiB
C
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/******************************************************************************
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*
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* Module Name: exoparg6 - AML execution - opcodes with 6 arguments
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2004, 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/acparser.h>
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#include <acpi/amlcode.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exoparg6")
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/*!
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* Naming convention for AML interpreter execution routines.
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*
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* The routines that begin execution of AML opcodes are named with a common
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* convention based upon the number of arguments, the number of target operands,
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* and whether or not a value is returned:
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*
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* AcpiExOpcode_xA_yT_zR
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*
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* Where:
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*
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* xA - ARGUMENTS: The number of arguments (input operands) that are
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* required for this opcode type (1 through 6 args).
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* yT - TARGETS: The number of targets (output operands) that are required
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* for this opcode type (0, 1, or 2 targets).
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* zR - RETURN VALUE: Indicates whether this opcode type returns a value
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* as the function return (0 or 1).
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*
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* The AcpiExOpcode* functions are called via the Dispatcher component with
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* fully resolved operands.
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!*/
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_do_match
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*
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* PARAMETERS: match_op - The AML match operand
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* package_value - Value from the target package
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* match_value - Value to be matched
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*
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* RETURN: TRUE if the match is successful, FALSE otherwise
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*
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* DESCRIPTION: Implements the low-level match for the ASL Match operator
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*
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******************************************************************************/
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u8
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acpi_ex_do_match (
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u32 match_op,
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acpi_integer package_value,
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acpi_integer match_value)
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{
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switch (match_op) {
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case MATCH_MTR: /* always true */
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break;
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case MATCH_MEQ: /* true if equal */
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if (package_value != match_value) {
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return (FALSE);
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}
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break;
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case MATCH_MLE: /* true if less than or equal */
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if (package_value > match_value) {
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return (FALSE);
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}
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break;
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case MATCH_MLT: /* true if less than */
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if (package_value >= match_value) {
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return (FALSE);
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}
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break;
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case MATCH_MGE: /* true if greater than or equal */
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if (package_value < match_value) {
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return (FALSE);
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}
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break;
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case MATCH_MGT: /* true if greater than */
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if (package_value <= match_value) {
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return (FALSE);
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}
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break;
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default: /* undefined */
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return (FALSE);
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}
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return TRUE;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_6A_0T_1R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value
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*
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******************************************************************************/
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acpi_status
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acpi_ex_opcode_6A_0T_1R (
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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union acpi_operand_object *return_desc = NULL;
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acpi_status status = AE_OK;
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u32 index;
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union acpi_operand_object *this_element;
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ACPI_FUNCTION_TRACE_STR ("ex_opcode_6A_0T_1R", acpi_ps_get_opcode_name (walk_state->opcode));
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switch (walk_state->opcode) {
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case AML_MATCH_OP:
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/*
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* Match (search_package[0], match_op1[1], match_object1[2],
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* match_op2[3], match_object2[4], start_index[5])
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*/
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/* Validate match comparison sub-opcodes */
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if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) ||
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(operand[3]->integer.value > MAX_MATCH_OPERATOR)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "operation encoding out of range\n"));
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status = AE_AML_OPERAND_VALUE;
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goto cleanup;
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}
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index = (u32) operand[5]->integer.value;
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if (index >= (u32) operand[0]->package.count) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Index beyond package end\n"));
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status = AE_AML_PACKAGE_LIMIT;
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goto cleanup;
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}
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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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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Default return value if no match found */
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return_desc->integer.value = ACPI_INTEGER_MAX;
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/*
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* Examine each element until a match is found. Within the loop,
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* "continue" signifies that the current element does not match
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* and the next should be examined.
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*
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* Upon finding a match, the loop will terminate via "break" at
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* the bottom. If it terminates "normally", match_value will be -1
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* (its initial value) indicating that no match was found. When
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* returned as a Number, this will produce the Ones value as specified.
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*/
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for ( ; index < operand[0]->package.count; index++) {
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this_element = operand[0]->package.elements[index];
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/*
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* Treat any NULL or non-numeric elements as non-matching.
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*/
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if (!this_element ||
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ACPI_GET_OBJECT_TYPE (this_element) != ACPI_TYPE_INTEGER) {
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continue;
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}
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/*
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* "continue" (proceed to next iteration of enclosing
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* "for" loop) signifies a non-match.
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*/
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if (!acpi_ex_do_match ((u32) operand[1]->integer.value,
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this_element->integer.value, operand[2]->integer.value)) {
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continue;
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}
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if (!acpi_ex_do_match ((u32) operand[3]->integer.value,
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this_element->integer.value, operand[4]->integer.value)) {
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continue;
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}
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/* Match found: Index is the return value */
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return_desc->integer.value = index;
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break;
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}
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break;
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case AML_LOAD_TABLE_OP:
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status = acpi_ex_load_table_op (walk_state, &return_desc);
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break;
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default:
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ACPI_REPORT_ERROR (("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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walk_state->result_obj = return_desc;
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cleanup:
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/* Delete return object on error */
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if (ACPI_FAILURE (status)) {
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acpi_ut_remove_reference (return_desc);
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}
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return_ACPI_STATUS (status);
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}
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