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/******************************************************************************
*
* Module Name: exoparg3 - AML execution - opcodes with 3 arguments
* $Revision: 3 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "acinterp.h"
#include "acparser.h"
#include "amlcode.h"
#define _COMPONENT ACPI_EXECUTER
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 (
acpi_walk_state *walk_state)
{
acpi_operand_object **operand = &walk_state->operands[0];
ACPI_SIGNAL_FATAL_INFO *fatal;
acpi_status status = AE_OK;
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 (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!
*/
acpi_os_signal (ACPI_SIGNAL_FATAL, fatal);
/* Might return while OS is shutting down, just continue */
ACPI_MEM_FREE (fatal);
break;
default:
REPORT_ERROR (("Acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",
walk_state->opcode));
status = AE_AML_BAD_OPCODE;
goto cleanup;
break;
}
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 (
acpi_walk_state *walk_state)
{
acpi_operand_object **operand = &walk_state->operands[0];
acpi_operand_object *return_desc = NULL;
char *buffer;
acpi_status status = AE_OK;
u32 index;
u32 length;
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 (operand[0]->common.type);
if (!return_desc) {
status = AE_NO_MEMORY;
goto cleanup;
}
/* Get the Integer values from the objects */
index = (u32) operand[1]->integer.value;
length = (u32) 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 = operand[0]->string.length - index;
}
/* Allocate a new buffer for the String/Buffer */
buffer = ACPI_MEM_CALLOCATE (length + 1);
if (!buffer) {
return (AE_NO_MEMORY);
}
/* Copy the portion requested */
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 = length;
}
break;
default:
REPORT_ERROR (("Acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",
walk_state->opcode));
status = AE_AML_BAD_OPCODE;
goto cleanup;
break;
}
/* 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 */
walk_state->result_obj = return_desc;
return_ACPI_STATUS (status);
}
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