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

 *

 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments

 *

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

/*

 * Copyright (C) 2000 - 2007, 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,

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

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

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

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

                fatal = ACPI_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_FREE(fatal);

                break;

        default:

                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",

                            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 = NULL;

        acpi_status status = AE_OK;

        acpi_integer 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 = 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 */

                else if ((index + length) > operand[0]->string.length) {

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

                            (acpi_size) index;

                }

                /* Strings always have a sub-pointer, not so for buffers */

                switch (ACPI_GET_OBJECT_TYPE(operand[0])) {

                case ACPI_TYPE_STRING:

                        /* Always allocate a new buffer for the String */

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

                        if (!buffer) {

                                status = AE_NO_MEMORY;

                                goto cleanup;

                        }

                        break;

                case ACPI_TYPE_BUFFER:

                        /* If the requested length is zero, don't allocate a buffer */

                        if (length > 0) {

                                /* Allocate a new buffer for the Buffer */

                                buffer = ACPI_ALLOCATE_ZEROED(length);

                                if (!buffer) {

                                        status = AE_NO_MEMORY;

                                        goto cleanup;

                                }

                        }

                        break;

                default:        /* Should not happen */

                        status = AE_AML_OPERAND_TYPE;

                        goto cleanup;

                }

                if (buffer) {

                        /* We have a buffer, 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;

                /* Mark buffer initialized */

                return_desc->buffer.flags |= AOPOBJ_DATA_VALID;

                break;

        default:

                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",

                            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) || walk_state->result_obj) {

                acpi_ut_remove_reference(return_desc);

        }

        /* Set the return object and exit */

        else {

                walk_state->result_obj = return_desc;

        }

        return_ACPI_STATUS(status);

}