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/******************************************************************************

 *

 * Module Name: exoparg6 - AML execution - opcodes with 6 arguments

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2004, R. Byron Moore

 * 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 <acpi/acinterp.h>

#include <acpi/acparser.h>

#include <acpi/amlcode.h>

#define _COMPONENT          ACPI_EXECUTER

         ACPI_MODULE_NAME    ("exoparg6")

/*!

 * Naming convention for AML interpreter execution routines.

 *

 * The routines that begin execution of AML opcodes are named with a common

 * convention based upon the number of arguments, the number of target operands,

 * and whether or not a value is returned:

 *

 *      AcpiExOpcode_xA_yT_zR

 *

 * Where:

 *

 * xA - ARGUMENTS:    The number of arguments (input operands) that are

 *                    required for this opcode type (1 through 6 args).

 * yT - TARGETS:      The number of targets (output operands) that are required

 *                    for this opcode type (0, 1, or 2 targets).

 * zR - RETURN VALUE: Indicates whether this opcode type returns a value

 *                    as the function return (0 or 1).

 *

 * The AcpiExOpcode* functions are called via the Dispatcher component with

 * fully resolved operands.

!*/

/*******************************************************************************

 *

 * FUNCTION:    acpi_ex_do_match

 *

 * PARAMETERS:  match_op        - The AML match operand

 *              package_value   - Value from the target package

 *              match_value     - Value to be matched

 *

 * RETURN:      TRUE if the match is successful, FALSE otherwise

 *

 * DESCRIPTION: Implements the low-level match for the ASL Match operator

 *

 ******************************************************************************/

u8

acpi_ex_do_match (

        u32                             match_op,

        acpi_integer                    package_value,

        acpi_integer                    match_value)

{

        switch (match_op) {

        case MATCH_MTR:   /* always true */

                break;

        case MATCH_MEQ:   /* true if equal   */

                if (package_value != match_value) {

                        return (FALSE);

                }

                break;

        case MATCH_MLE:   /* true if less than or equal  */

                if (package_value > match_value) {

                        return (FALSE);

                }

                break;

        case MATCH_MLT:   /* true if less than   */

                if (package_value >= match_value) {

                        return (FALSE);

                }

                break;

        case MATCH_MGE:   /* true if greater than or equal   */

                if (package_value < match_value) {

                        return (FALSE);

                }

                break;

        case MATCH_MGT:   /* true if greater than    */

                if (package_value <= match_value) {

                        return (FALSE);

                }

                break;

        default:    /* undefined   */

                return (FALSE);

        }

        return TRUE;

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ex_opcode_6A_0T_1R

 *

 * PARAMETERS:  walk_state          - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value

 *

 ******************************************************************************/

acpi_status

acpi_ex_opcode_6A_0T_1R (

        struct acpi_walk_state          *walk_state)

{

        union acpi_operand_object       **operand = &walk_state->operands[0];

        union acpi_operand_object       *return_desc = NULL;

        acpi_status                     status = AE_OK;

        u32                             index;

        union acpi_operand_object       *this_element;

        ACPI_FUNCTION_TRACE_STR ("ex_opcode_6A_0T_1R", acpi_ps_get_opcode_name (walk_state->opcode));

        switch (walk_state->opcode) {

        case AML_MATCH_OP:

                /*

                 * Match (search_package[0], match_op1[1], match_object1[2],

                 *                          match_op2[3], match_object2[4], start_index[5])

                 */

                /* Validate match comparison sub-opcodes */

                if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) ||

                        (operand[3]->integer.value > MAX_MATCH_OPERATOR)) {

                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "operation encoding out of range\n"));

                        status = AE_AML_OPERAND_VALUE;

                        goto cleanup;

                }

                index = (u32) operand[5]->integer.value;

                if (index >= (u32) operand[0]->package.count) {

                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Index beyond package end\n"));

                        status = AE_AML_PACKAGE_LIMIT;

                        goto cleanup;

                }

                return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);

                if (!return_desc) {

                        status = AE_NO_MEMORY;

                        goto cleanup;

                }

                /* Default return value if no match found */

                return_desc->integer.value = ACPI_INTEGER_MAX;

                /*

                 * Examine each element until a match is found.  Within the loop,

                 * "continue" signifies that the current element does not match

                 * and the next should be examined.

                 *

                 * Upon finding a match, the loop will terminate via "break" at

                 * the bottom.  If it terminates "normally", match_value will be -1

                 * (its initial value) indicating that no match was found.  When

                 * returned as a Number, this will produce the Ones value as specified.

                 */

                for ( ; index < operand[0]->package.count; index++) {

                        this_element = operand[0]->package.elements[index];

                        /*

                         * Treat any NULL or non-numeric elements as non-matching.

                         */

                        if (!this_element ||

                                ACPI_GET_OBJECT_TYPE (this_element) != ACPI_TYPE_INTEGER) {

                                continue;

                        }

                        /*

                         * "continue" (proceed to next iteration of enclosing

                         * "for" loop) signifies a non-match.

                         */

                        if (!acpi_ex_do_match ((u32) operand[1]->integer.value,

                                           this_element->integer.value, operand[2]->integer.value)) {

                                continue;

                        }

                        if (!acpi_ex_do_match ((u32) operand[3]->integer.value,

                                           this_element->integer.value, operand[4]->integer.value)) {

                                continue;

                        }

                        /* Match found: Index is the return value */

                        return_desc->integer.value = index;

                        break;

                }

                break;

        case AML_LOAD_TABLE_OP:

                status = acpi_ex_load_table_op (walk_state, &return_desc);

                break;

        default:

                ACPI_REPORT_ERROR (("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",

                                walk_state->opcode));

                status = AE_AML_BAD_OPCODE;

                goto cleanup;

        }

        walk_state->result_obj = return_desc;

cleanup:

        /* Delete return object on error */

        if (ACPI_FAILURE (status)) {

                acpi_ut_remove_reference (return_desc);

        }

        return_ACPI_STATUS (status);

}