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

 *

 * Module Name: exoparg3 - AML execution - opcodes with 3 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    ("exoparg3")

/*!

 * 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_opcode_3A_0T_0R

 *

 * PARAMETERS:  walk_state          - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Execute Triadic operator (3 operands)

 *

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

acpi_status

acpi_ex_opcode_3A_0T_0R (

        struct acpi_walk_state          *walk_state)

{

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

        struct acpi_signal_fatal_info   *fatal;

        acpi_status                     status = AE_OK;

        ACPI_FUNCTION_TRACE_STR ("ex_opcode_3A_0T_0R", acpi_ps_get_opcode_name (walk_state->opcode));

        switch (walk_state->opcode) {

        case AML_FATAL_OP:          /* Fatal (fatal_type fatal_code fatal_arg)   */

                ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

                        "fatal_op: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",

                        (u32) operand[0]->integer.value,

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

                        (u32) operand[2]->integer.value));

                fatal = ACPI_MEM_ALLOCATE (sizeof (struct acpi_signal_fatal_info));

                if (fatal) {

                        fatal->type     = (u32) operand[0]->integer.value;

                        fatal->code     = (u32) operand[1]->integer.value;

                        fatal->argument = (u32) operand[2]->integer.value;

                }

                /*

                 * Always signal the OS!

                 */

                status = acpi_os_signal (ACPI_SIGNAL_FATAL, fatal);

                /* Might return while OS is shutting down, just continue */

                ACPI_MEM_FREE (fatal);

                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;

        }

cleanup:

        return_ACPI_STATUS (status);

}

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

 *

 * FUNCTION:    acpi_ex_opcode_3A_1T_1R

 *

 * PARAMETERS:  walk_state          - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Execute Triadic operator (3 operands)

 *

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

acpi_status

acpi_ex_opcode_3A_1T_1R (

        struct acpi_walk_state          *walk_state)

{

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

        union acpi_operand_object       *return_desc = NULL;

        char                            *buffer;

        acpi_status                     status = AE_OK;

        acpi_native_uint                index;

        acpi_size                       length;

        ACPI_FUNCTION_TRACE_STR ("ex_opcode_3A_1T_1R", acpi_ps_get_opcode_name (walk_state->opcode));

        switch (walk_state->opcode) {

        case AML_MID_OP:        /* Mid  (Source[0], Index[1], Length[2], Result[3]) */

                /*

                 * Create the return object.  The Source operand is guaranteed to be

                 * either a String or a Buffer, so just use its type.

                 */

                return_desc = acpi_ut_create_internal_object (ACPI_GET_OBJECT_TYPE (operand[0]));

                if (!return_desc) {

                        status = AE_NO_MEMORY;

                        goto cleanup;

                }

                /* Get the Integer values from the objects */

                index = (acpi_native_uint) operand[1]->integer.value;

                length = (acpi_size) operand[2]->integer.value;

                /*

                 * If the index is beyond the length of the String/Buffer, or if the

                 * requested length is zero, return a zero-length String/Buffer

                 */

                if ((index < operand[0]->string.length) &&

                        (length > 0)) {

                        /* Truncate request if larger than the actual String/Buffer */

                        if ((index + length) >

                                operand[0]->string.length) {

                                length = (acpi_size) operand[0]->string.length - index;

                        }

                        /* Allocate a new buffer for the String/Buffer */

                        buffer = ACPI_MEM_CALLOCATE ((acpi_size) length + 1);

                        if (!buffer) {

                                status = AE_NO_MEMORY;

                                goto cleanup;

                        }

                        /* Copy the portion requested */

                        ACPI_MEMCPY (buffer, operand[0]->string.pointer + index,

                                          length);

                        /* Set the length of the new String/Buffer */

                        return_desc->string.pointer = buffer;

                        return_desc->string.length = (u32) length;

                }

                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;

        }

        /* Store the result in the target */

        status = acpi_ex_store (return_desc, operand[3], walk_state);

cleanup:

        /* Delete return object on error */

        if (ACPI_FAILURE (status)) {

                acpi_ut_remove_reference (return_desc);

        }

        /* Set the return object and exit */

        if (!walk_state->result_obj) {

                walk_state->result_obj = return_desc;

        }

        return_ACPI_STATUS (status);

}