1049 lines
27 KiB
C
1049 lines
27 KiB
C
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/******************************************************************************
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*
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* Module Name: exoparg1 - AML execution - opcodes with 1 argument
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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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/acparser.h>
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#include <acpi/acdispat.h>
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#include <acpi/acinterp.h>
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#include <acpi/amlcode.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exoparg1")
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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 (0 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_opcode_0A_0T_1R
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*
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* PARAMETERS: walk_state - Current state (contains AML opcode)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute operator with no operands, one return value
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_0A_0T_1R(struct acpi_walk_state *walk_state)
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{
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acpi_status status = AE_OK;
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union acpi_operand_object *return_desc = NULL;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_0A_0T_1R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Examine the AML opcode */
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switch (walk_state->opcode) {
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case AML_TIMER_OP: /* Timer () */
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/* Create a return object of type Integer */
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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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return_desc->integer.value = acpi_os_get_timer();
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break;
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default: /* Unknown opcode */
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ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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break;
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}
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cleanup:
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/* Delete return object on error */
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if ((ACPI_FAILURE(status)) || walk_state->result_obj) {
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acpi_ut_remove_reference(return_desc);
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walk_state->result_obj = NULL;
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} else {
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/* Save the return value */
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walk_state->result_obj = return_desc;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_1A_0T_0R
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*
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* PARAMETERS: walk_state - Current state (contains AML opcode)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
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* object stack
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_1A_0T_0R(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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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_0T_0R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Examine the AML opcode */
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switch (walk_state->opcode) {
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case AML_RELEASE_OP: /* Release (mutex_object) */
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status = acpi_ex_release_mutex(operand[0], walk_state);
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break;
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case AML_RESET_OP: /* Reset (event_object) */
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status = acpi_ex_system_reset_event(operand[0]);
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break;
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case AML_SIGNAL_OP: /* Signal (event_object) */
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status = acpi_ex_system_signal_event(operand[0]);
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break;
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case AML_SLEEP_OP: /* Sleep (msec_time) */
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status = acpi_ex_system_do_suspend(operand[0]->integer.value);
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break;
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case AML_STALL_OP: /* Stall (usec_time) */
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status =
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acpi_ex_system_do_stall((u32) operand[0]->integer.value);
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break;
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case AML_UNLOAD_OP: /* Unload (Handle) */
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status = acpi_ex_unload_table(operand[0]);
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break;
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default: /* Unknown opcode */
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ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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break;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_1A_1T_0R
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*
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* PARAMETERS: walk_state - Current state (contains AML opcode)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with one argument, one target, and no
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* return value.
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_1A_1T_0R(struct acpi_walk_state *walk_state)
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{
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acpi_status status = AE_OK;
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union acpi_operand_object **operand = &walk_state->operands[0];
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ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_1T_0R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Examine the AML opcode */
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switch (walk_state->opcode) {
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case AML_LOAD_OP:
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status = acpi_ex_load_op(operand[0], operand[1], walk_state);
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break;
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default: /* Unknown opcode */
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ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
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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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cleanup:
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_1A_1T_1R
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*
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* PARAMETERS: walk_state - Current state (contains AML opcode)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with one argument, one target, and a
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* return value.
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_1A_1T_1R(struct acpi_walk_state *walk_state)
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{
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acpi_status status = AE_OK;
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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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union acpi_operand_object *return_desc2 = NULL;
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u32 temp32;
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u32 i;
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acpi_integer power_of_ten;
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acpi_integer digit;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_1T_1R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Examine the AML opcode */
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switch (walk_state->opcode) {
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case AML_BIT_NOT_OP:
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case AML_FIND_SET_LEFT_BIT_OP:
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case AML_FIND_SET_RIGHT_BIT_OP:
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case AML_FROM_BCD_OP:
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case AML_TO_BCD_OP:
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case AML_COND_REF_OF_OP:
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/* Create a return object of type Integer for these opcodes */
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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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switch (walk_state->opcode) {
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case AML_BIT_NOT_OP: /* Not (Operand, Result) */
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return_desc->integer.value = ~operand[0]->integer.value;
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break;
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case AML_FIND_SET_LEFT_BIT_OP: /* find_set_left_bit (Operand, Result) */
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return_desc->integer.value = operand[0]->integer.value;
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/*
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* Acpi specification describes Integer type as a little
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* endian unsigned value, so this boundary condition is valid.
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*/
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for (temp32 = 0; return_desc->integer.value &&
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temp32 < ACPI_INTEGER_BIT_SIZE; ++temp32) {
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return_desc->integer.value >>= 1;
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}
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return_desc->integer.value = temp32;
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break;
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case AML_FIND_SET_RIGHT_BIT_OP: /* find_set_right_bit (Operand, Result) */
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return_desc->integer.value = operand[0]->integer.value;
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/*
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* The Acpi specification describes Integer type as a little
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* endian unsigned value, so this boundary condition is valid.
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*/
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for (temp32 = 0; return_desc->integer.value &&
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temp32 < ACPI_INTEGER_BIT_SIZE; ++temp32) {
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return_desc->integer.value <<= 1;
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}
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/* Since the bit position is one-based, subtract from 33 (65) */
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return_desc->integer.value =
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temp32 ==
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0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - temp32;
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break;
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case AML_FROM_BCD_OP: /* from_bcd (BCDValue, Result) */
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|
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/*
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* The 64-bit ACPI integer can hold 16 4-bit BCD characters
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* (if table is 32-bit, integer can hold 8 BCD characters)
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* Convert each 4-bit BCD value
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*/
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power_of_ten = 1;
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return_desc->integer.value = 0;
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digit = operand[0]->integer.value;
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/* Convert each BCD digit (each is one nybble wide) */
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for (i = 0;
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(i < acpi_gbl_integer_nybble_width) && (digit > 0);
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i++) {
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/* Get the least significant 4-bit BCD digit */
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temp32 = ((u32) digit) & 0xF;
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|
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/* Check the range of the digit */
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|
|
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if (temp32 > 9) {
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ACPI_ERROR((AE_INFO,
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"BCD digit too large (not decimal): 0x%X",
|
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temp32));
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|
|
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status = AE_AML_NUMERIC_OVERFLOW;
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goto cleanup;
|
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}
|
|
|
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/* Sum the digit into the result with the current power of 10 */
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|
|
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return_desc->integer.value +=
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(((acpi_integer) temp32) * power_of_ten);
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|
|
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/* Shift to next BCD digit */
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|
|
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digit >>= 4;
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|
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/* Next power of 10 */
|
|
|
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power_of_ten *= 10;
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}
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break;
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|
|
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case AML_TO_BCD_OP: /* to_bcd (Operand, Result) */
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|
|
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return_desc->integer.value = 0;
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digit = operand[0]->integer.value;
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|
|
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/* Each BCD digit is one nybble wide */
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|
|
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for (i = 0;
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(i < acpi_gbl_integer_nybble_width) && (digit > 0);
|
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i++) {
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(void)acpi_ut_short_divide(digit, 10, &digit,
|
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&temp32);
|
|
|
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/*
|
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* Insert the BCD digit that resides in the
|
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* remainder from above
|
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*/
|
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return_desc->integer.value |=
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(((acpi_integer) temp32) << ACPI_MUL_4(i));
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}
|
|
|
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/* Overflow if there is any data left in Digit */
|
|
|
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if (digit > 0) {
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ACPI_ERROR((AE_INFO,
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"Integer too large to convert to BCD: %8.8X%8.8X",
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ACPI_FORMAT_UINT64(operand[0]->
|
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integer.value)));
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status = AE_AML_NUMERIC_OVERFLOW;
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goto cleanup;
|
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}
|
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break;
|
|
|
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case AML_COND_REF_OF_OP: /* cond_ref_of (source_object, Result) */
|
|
|
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/*
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* This op is a little strange because the internal return value is
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* different than the return value stored in the result descriptor
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* (There are really two return values)
|
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*/
|
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if ((struct acpi_namespace_node *)operand[0] ==
|
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acpi_gbl_root_node) {
|
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/*
|
|
* This means that the object does not exist in the namespace,
|
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* return FALSE
|
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*/
|
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return_desc->integer.value = 0;
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goto cleanup;
|
|
}
|
|
|
|
/* Get the object reference, store it, and remove our reference */
|
|
|
|
status = acpi_ex_get_object_reference(operand[0],
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&return_desc2,
|
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walk_state);
|
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if (ACPI_FAILURE(status)) {
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goto cleanup;
|
|
}
|
|
|
|
status =
|
|
acpi_ex_store(return_desc2, operand[1], walk_state);
|
|
acpi_ut_remove_reference(return_desc2);
|
|
|
|
/* The object exists in the namespace, return TRUE */
|
|
|
|
return_desc->integer.value = ACPI_INTEGER_MAX;
|
|
goto cleanup;
|
|
|
|
default:
|
|
/* No other opcodes get here */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AML_STORE_OP: /* Store (Source, Target) */
|
|
|
|
/*
|
|
* A store operand is typically a number, string, buffer or lvalue
|
|
* Be careful about deleting the source object,
|
|
* since the object itself may have been stored.
|
|
*/
|
|
status = acpi_ex_store(operand[0], operand[1], walk_state);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* It is possible that the Store already produced a return object */
|
|
|
|
if (!walk_state->result_obj) {
|
|
/*
|
|
* Normally, we would remove a reference on the Operand[0]
|
|
* parameter; But since it is being used as the internal return
|
|
* object (meaning we would normally increment it), the two
|
|
* cancel out, and we simply don't do anything.
|
|
*/
|
|
walk_state->result_obj = operand[0];
|
|
walk_state->operands[0] = NULL; /* Prevent deletion */
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
|
|
/*
|
|
* ACPI 2.0 Opcodes
|
|
*/
|
|
case AML_COPY_OP: /* Copy (Source, Target) */
|
|
|
|
status =
|
|
acpi_ut_copy_iobject_to_iobject(operand[0], &return_desc,
|
|
walk_state);
|
|
break;
|
|
|
|
case AML_TO_DECSTRING_OP: /* to_decimal_string (Data, Result) */
|
|
|
|
status = acpi_ex_convert_to_string(operand[0], &return_desc,
|
|
ACPI_EXPLICIT_CONVERT_DECIMAL);
|
|
if (return_desc == operand[0]) {
|
|
|
|
/* No conversion performed, add ref to handle return value */
|
|
acpi_ut_add_reference(return_desc);
|
|
}
|
|
break;
|
|
|
|
case AML_TO_HEXSTRING_OP: /* to_hex_string (Data, Result) */
|
|
|
|
status = acpi_ex_convert_to_string(operand[0], &return_desc,
|
|
ACPI_EXPLICIT_CONVERT_HEX);
|
|
if (return_desc == operand[0]) {
|
|
|
|
/* No conversion performed, add ref to handle return value */
|
|
acpi_ut_add_reference(return_desc);
|
|
}
|
|
break;
|
|
|
|
case AML_TO_BUFFER_OP: /* to_buffer (Data, Result) */
|
|
|
|
status = acpi_ex_convert_to_buffer(operand[0], &return_desc);
|
|
if (return_desc == operand[0]) {
|
|
|
|
/* No conversion performed, add ref to handle return value */
|
|
acpi_ut_add_reference(return_desc);
|
|
}
|
|
break;
|
|
|
|
case AML_TO_INTEGER_OP: /* to_integer (Data, Result) */
|
|
|
|
status = acpi_ex_convert_to_integer(operand[0], &return_desc,
|
|
ACPI_ANY_BASE);
|
|
if (return_desc == operand[0]) {
|
|
|
|
/* No conversion performed, add ref to handle return value */
|
|
acpi_ut_add_reference(return_desc);
|
|
}
|
|
break;
|
|
|
|
case AML_SHIFT_LEFT_BIT_OP: /* shift_left_bit (Source, bit_num) */
|
|
case AML_SHIFT_RIGHT_BIT_OP: /* shift_right_bit (Source, bit_num) */
|
|
|
|
/* These are two obsolete opcodes */
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
"%s is obsolete and not implemented",
|
|
acpi_ps_get_opcode_name(walk_state->opcode)));
|
|
status = AE_SUPPORT;
|
|
goto cleanup;
|
|
|
|
default: /* Unknown opcode */
|
|
|
|
ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
|
|
walk_state->opcode));
|
|
status = AE_AML_BAD_OPCODE;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (ACPI_SUCCESS(status)) {
|
|
|
|
/* Store the return value computed above into the target object */
|
|
|
|
status = acpi_ex_store(return_desc, operand[1], walk_state);
|
|
}
|
|
|
|
cleanup:
|
|
|
|
/* Delete return object on error */
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_ut_remove_reference(return_desc);
|
|
}
|
|
|
|
/* Save return object on success */
|
|
|
|
else if (!walk_state->result_obj) {
|
|
walk_state->result_obj = return_desc;
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_opcode_1A_0T_1R
|
|
*
|
|
* PARAMETERS: walk_state - Current state (contains AML opcode)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Execute opcode with one argument, no target, and a return value
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
|
|
{
|
|
union acpi_operand_object **operand = &walk_state->operands[0];
|
|
union acpi_operand_object *temp_desc;
|
|
union acpi_operand_object *return_desc = NULL;
|
|
acpi_status status = AE_OK;
|
|
u32 type;
|
|
acpi_integer value;
|
|
|
|
ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_0T_1R,
|
|
acpi_ps_get_opcode_name(walk_state->opcode));
|
|
|
|
/* Examine the AML opcode */
|
|
|
|
switch (walk_state->opcode) {
|
|
case AML_LNOT_OP: /* LNot (Operand) */
|
|
|
|
return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
|
|
if (!return_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Set result to ONES (TRUE) if Value == 0. Note:
|
|
* return_desc->Integer.Value is initially == 0 (FALSE) from above.
|
|
*/
|
|
if (!operand[0]->integer.value) {
|
|
return_desc->integer.value = ACPI_INTEGER_MAX;
|
|
}
|
|
break;
|
|
|
|
case AML_DECREMENT_OP: /* Decrement (Operand) */
|
|
case AML_INCREMENT_OP: /* Increment (Operand) */
|
|
|
|
/*
|
|
* Create a new integer. Can't just get the base integer and
|
|
* increment it because it may be an Arg or Field.
|
|
*/
|
|
return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
|
|
if (!return_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Since we are expecting a Reference operand, it can be either a
|
|
* NS Node or an internal object.
|
|
*/
|
|
temp_desc = operand[0];
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(temp_desc) ==
|
|
ACPI_DESC_TYPE_OPERAND) {
|
|
|
|
/* Internal reference object - prevent deletion */
|
|
|
|
acpi_ut_add_reference(temp_desc);
|
|
}
|
|
|
|
/*
|
|
* Convert the Reference operand to an Integer (This removes a
|
|
* reference on the Operand[0] object)
|
|
*
|
|
* NOTE: We use LNOT_OP here in order to force resolution of the
|
|
* reference operand to an actual integer.
|
|
*/
|
|
status =
|
|
acpi_ex_resolve_operands(AML_LNOT_OP, &temp_desc,
|
|
walk_state);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"While resolving operands for [%s]",
|
|
acpi_ps_get_opcode_name(walk_state->
|
|
opcode)));
|
|
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* temp_desc is now guaranteed to be an Integer object --
|
|
* Perform the actual increment or decrement
|
|
*/
|
|
if (walk_state->opcode == AML_INCREMENT_OP) {
|
|
return_desc->integer.value =
|
|
temp_desc->integer.value + 1;
|
|
} else {
|
|
return_desc->integer.value =
|
|
temp_desc->integer.value - 1;
|
|
}
|
|
|
|
/* Finished with this Integer object */
|
|
|
|
acpi_ut_remove_reference(temp_desc);
|
|
|
|
/*
|
|
* Store the result back (indirectly) through the original
|
|
* Reference object
|
|
*/
|
|
status = acpi_ex_store(return_desc, operand[0], walk_state);
|
|
break;
|
|
|
|
case AML_TYPE_OP: /* object_type (source_object) */
|
|
|
|
/*
|
|
* Note: The operand is not resolved at this point because we want to
|
|
* get the associated object, not its value. For example, we don't
|
|
* want to resolve a field_unit to its value, we want the actual
|
|
* field_unit object.
|
|
*/
|
|
|
|
/* Get the type of the base object */
|
|
|
|
status =
|
|
acpi_ex_resolve_multiple(walk_state, operand[0], &type,
|
|
NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Allocate a descriptor to hold the type. */
|
|
|
|
return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
|
|
if (!return_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
return_desc->integer.value = type;
|
|
break;
|
|
|
|
case AML_SIZE_OF_OP: /* size_of (source_object) */
|
|
|
|
/*
|
|
* Note: The operand is not resolved at this point because we want to
|
|
* get the associated object, not its value.
|
|
*/
|
|
|
|
/* Get the base object */
|
|
|
|
status = acpi_ex_resolve_multiple(walk_state,
|
|
operand[0], &type,
|
|
&temp_desc);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* The type of the base object must be integer, buffer, string, or
|
|
* package. All others are not supported.
|
|
*
|
|
* NOTE: Integer is not specifically supported by the ACPI spec,
|
|
* but is supported implicitly via implicit operand conversion.
|
|
* rather than bother with conversion, we just use the byte width
|
|
* global (4 or 8 bytes).
|
|
*/
|
|
switch (type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
value = acpi_gbl_integer_byte_width;
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
value = temp_desc->string.length;
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
/* Buffer arguments may not be evaluated at this point */
|
|
|
|
status = acpi_ds_get_buffer_arguments(temp_desc);
|
|
value = temp_desc->buffer.length;
|
|
break;
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
|
|
/* Package arguments may not be evaluated at this point */
|
|
|
|
status = acpi_ds_get_package_arguments(temp_desc);
|
|
value = temp_desc->package.count;
|
|
break;
|
|
|
|
default:
|
|
ACPI_ERROR((AE_INFO,
|
|
"Operand must be Buffer/Integer/String/Package - found type %s",
|
|
acpi_ut_get_type_name(type)));
|
|
status = AE_AML_OPERAND_TYPE;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Now that we have the size of the object, create a result
|
|
* object to hold the value
|
|
*/
|
|
return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
|
|
if (!return_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
return_desc->integer.value = value;
|
|
break;
|
|
|
|
case AML_REF_OF_OP: /* ref_of (source_object) */
|
|
|
|
status =
|
|
acpi_ex_get_object_reference(operand[0], &return_desc,
|
|
walk_state);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
break;
|
|
|
|
case AML_DEREF_OF_OP: /* deref_of (obj_reference | String) */
|
|
|
|
/* Check for a method local or argument, or standalone String */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(operand[0]) ==
|
|
ACPI_DESC_TYPE_NAMED) {
|
|
temp_desc =
|
|
acpi_ns_get_attached_object((struct
|
|
acpi_namespace_node *)
|
|
operand[0]);
|
|
if (temp_desc
|
|
&&
|
|
((ACPI_GET_OBJECT_TYPE(temp_desc) ==
|
|
ACPI_TYPE_STRING)
|
|
|| (ACPI_GET_OBJECT_TYPE(temp_desc) ==
|
|
ACPI_TYPE_LOCAL_REFERENCE))) {
|
|
operand[0] = temp_desc;
|
|
acpi_ut_add_reference(temp_desc);
|
|
} else {
|
|
status = AE_AML_OPERAND_TYPE;
|
|
goto cleanup;
|
|
}
|
|
} else {
|
|
switch (ACPI_GET_OBJECT_TYPE(operand[0])) {
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
/*
|
|
* This is a deref_of (local_x | arg_x)
|
|
*
|
|
* Must resolve/dereference the local/arg reference first
|
|
*/
|
|
switch (operand[0]->reference.opcode) {
|
|
case AML_LOCAL_OP:
|
|
case AML_ARG_OP:
|
|
|
|
/* Set Operand[0] to the value of the local/arg */
|
|
|
|
status =
|
|
acpi_ds_method_data_get_value
|
|
(operand[0]->reference.opcode,
|
|
operand[0]->reference.offset,
|
|
walk_state, &temp_desc);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Delete our reference to the input object and
|
|
* point to the object just retrieved
|
|
*/
|
|
acpi_ut_remove_reference(operand[0]);
|
|
operand[0] = temp_desc;
|
|
break;
|
|
|
|
case AML_REF_OF_OP:
|
|
|
|
/* Get the object to which the reference refers */
|
|
|
|
temp_desc =
|
|
operand[0]->reference.object;
|
|
acpi_ut_remove_reference(operand[0]);
|
|
operand[0] = temp_desc;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Must be an Index op - handled below */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
break;
|
|
|
|
default:
|
|
status = AE_AML_OPERAND_TYPE;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(operand[0]) !=
|
|
ACPI_DESC_TYPE_NAMED) {
|
|
if (ACPI_GET_OBJECT_TYPE(operand[0]) ==
|
|
ACPI_TYPE_STRING) {
|
|
/*
|
|
* This is a deref_of (String). The string is a reference
|
|
* to a named ACPI object.
|
|
*
|
|
* 1) Find the owning Node
|
|
* 2) Dereference the node to an actual object. Could be a
|
|
* Field, so we need to resolve the node to a value.
|
|
*/
|
|
status =
|
|
acpi_ns_get_node(walk_state->scope_info->
|
|
scope.node,
|
|
operand[0]->string.pointer,
|
|
ACPI_NS_SEARCH_PARENT,
|
|
ACPI_CAST_INDIRECT_PTR
|
|
(struct
|
|
acpi_namespace_node,
|
|
&return_desc));
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
status =
|
|
acpi_ex_resolve_node_to_value
|
|
(ACPI_CAST_INDIRECT_PTR
|
|
(struct acpi_namespace_node, &return_desc),
|
|
walk_state);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/* Operand[0] may have changed from the code above */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(operand[0]) ==
|
|
ACPI_DESC_TYPE_NAMED) {
|
|
/*
|
|
* This is a deref_of (object_reference)
|
|
* Get the actual object from the Node (This is the dereference).
|
|
* This case may only happen when a local_x or arg_x is
|
|
* dereferenced above.
|
|
*/
|
|
return_desc = acpi_ns_get_attached_object((struct
|
|
acpi_namespace_node
|
|
*)
|
|
operand[0]);
|
|
acpi_ut_add_reference(return_desc);
|
|
} else {
|
|
/*
|
|
* This must be a reference object produced by either the
|
|
* Index() or ref_of() operator
|
|
*/
|
|
switch (operand[0]->reference.opcode) {
|
|
case AML_INDEX_OP:
|
|
|
|
/*
|
|
* The target type for the Index operator must be
|
|
* either a Buffer or a Package
|
|
*/
|
|
switch (operand[0]->reference.target_type) {
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
|
|
temp_desc =
|
|
operand[0]->reference.object;
|
|
|
|
/*
|
|
* Create a new object that contains one element of the
|
|
* buffer -- the element pointed to by the index.
|
|
*
|
|
* NOTE: index into a buffer is NOT a pointer to a
|
|
* sub-buffer of the main buffer, it is only a pointer to a
|
|
* single element (byte) of the buffer!
|
|
*/
|
|
return_desc =
|
|
acpi_ut_create_internal_object
|
|
(ACPI_TYPE_INTEGER);
|
|
if (!return_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Since we are returning the value of the buffer at the
|
|
* indexed location, we don't need to add an additional
|
|
* reference to the buffer itself.
|
|
*/
|
|
return_desc->integer.value =
|
|
temp_desc->buffer.
|
|
pointer[operand[0]->reference.
|
|
offset];
|
|
break;
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
|
|
/*
|
|
* Return the referenced element of the package. We must
|
|
* add another reference to the referenced object, however.
|
|
*/
|
|
return_desc =
|
|
*(operand[0]->reference.where);
|
|
if (return_desc) {
|
|
acpi_ut_add_reference
|
|
(return_desc);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
"Unknown Index TargetType %X in obj %p",
|
|
operand[0]->reference.
|
|
target_type, operand[0]));
|
|
status = AE_AML_OPERAND_TYPE;
|
|
goto cleanup;
|
|
}
|
|
break;
|
|
|
|
case AML_REF_OF_OP:
|
|
|
|
return_desc = operand[0]->reference.object;
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(return_desc) ==
|
|
ACPI_DESC_TYPE_NAMED) {
|
|
return_desc =
|
|
acpi_ns_get_attached_object((struct
|
|
acpi_namespace_node
|
|
*)
|
|
return_desc);
|
|
}
|
|
|
|
/* Add another reference to the object! */
|
|
|
|
acpi_ut_add_reference(return_desc);
|
|
break;
|
|
|
|
default:
|
|
ACPI_ERROR((AE_INFO,
|
|
"Unknown opcode in reference(%p) - %X",
|
|
operand[0],
|
|
operand[0]->reference.opcode));
|
|
|
|
status = AE_TYPE;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
|
|
walk_state->opcode));
|
|
status = AE_AML_BAD_OPCODE;
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
|
|
/* Delete return object on error */
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_ut_remove_reference(return_desc);
|
|
}
|
|
|
|
/* Save return object on success */
|
|
|
|
else {
|
|
walk_state->result_obj = return_desc;
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|