1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
662 lines
17 KiB
C
662 lines
17 KiB
C
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/******************************************************************************
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*
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* Module Name: exresop - AML Interpreter operand/object resolution
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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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/amlcode.h>
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#include <acpi/acparser.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exresop")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_check_object_type
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*
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* PARAMETERS: type_needed Object type needed
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* this_type Actual object type
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* Object Object pointer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check required type against actual type
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*
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******************************************************************************/
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acpi_status
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acpi_ex_check_object_type (
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acpi_object_type type_needed,
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acpi_object_type this_type,
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void *object)
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{
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ACPI_FUNCTION_NAME ("ex_check_object_type");
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if (type_needed == ACPI_TYPE_ANY) {
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/* All types OK, so we don't perform any typechecks */
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return (AE_OK);
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}
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if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
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/*
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* Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
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* objects and thus allow them to be targets. (As per the ACPI
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* specification, a store to a constant is a noop.)
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*/
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if ((this_type == ACPI_TYPE_INTEGER) &&
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(((union acpi_operand_object *) object)->common.flags & AOPOBJ_AML_CONSTANT)) {
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return (AE_OK);
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}
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}
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if (type_needed != this_type) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [%s], found [%s] %p\n",
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acpi_ut_get_type_name (type_needed),
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acpi_ut_get_type_name (this_type), object));
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return (AE_AML_OPERAND_TYPE);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_resolve_operands
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*
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* PARAMETERS: Opcode - Opcode being interpreted
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* stack_ptr - Pointer to the operand stack to be
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* resolved
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert multiple input operands to the types required by the
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* target operator.
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*
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* Each 5-bit group in arg_types represents one required
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* operand and indicates the required Type. The corresponding operand
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* will be converted to the required type if possible, otherwise we
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* abort with an exception.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_resolve_operands (
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u16 opcode,
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union acpi_operand_object **stack_ptr,
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status = AE_OK;
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u8 object_type;
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void *temp_node;
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u32 arg_types;
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const struct acpi_opcode_info *op_info;
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u32 this_arg_type;
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acpi_object_type type_needed;
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ACPI_FUNCTION_TRACE_U32 ("ex_resolve_operands", opcode);
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op_info = acpi_ps_get_opcode_info (opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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return_ACPI_STATUS (AE_AML_BAD_OPCODE);
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}
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arg_types = op_info->runtime_args;
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if (arg_types == ARGI_INVALID_OPCODE) {
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ACPI_REPORT_ERROR (("resolve_operands: %X is not a valid AML opcode\n",
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opcode));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Opcode %X [%s] required_operand_types=%8.8X \n",
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opcode, op_info->name, arg_types));
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/*
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* Normal exit is with (arg_types == 0) at end of argument list.
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* Function will return an exception from within the loop upon
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* finding an entry which is not (or cannot be converted
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* to) the required type; if stack underflows; or upon
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* finding a NULL stack entry (which should not happen).
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*/
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while (GET_CURRENT_ARG_TYPE (arg_types)) {
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if (!stack_ptr || !*stack_ptr) {
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ACPI_REPORT_ERROR (("resolve_operands: Null stack entry at %p\n",
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stack_ptr));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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/* Extract useful items */
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obj_desc = *stack_ptr;
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/* Decode the descriptor type */
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switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) {
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case ACPI_DESC_TYPE_NAMED:
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/* Node */
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object_type = ((struct acpi_namespace_node *) obj_desc)->type;
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break;
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case ACPI_DESC_TYPE_OPERAND:
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/* ACPI internal object */
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object_type = ACPI_GET_OBJECT_TYPE (obj_desc);
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/* Check for bad acpi_object_type */
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if (!acpi_ut_valid_object_type (object_type)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad operand object type [%X]\n",
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object_type));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
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/*
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* Decode the Reference
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*/
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op_info = acpi_ps_get_opcode_info (opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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return_ACPI_STATUS (AE_AML_BAD_OPCODE);
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}
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switch (obj_desc->reference.opcode) {
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case AML_DEBUG_OP:
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case AML_NAME_OP:
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case AML_INDEX_OP:
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case AML_REF_OF_OP:
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case AML_ARG_OP:
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case AML_LOCAL_OP:
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case AML_LOAD_OP: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
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ACPI_DEBUG_ONLY_MEMBERS (ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Operand is a Reference, ref_opcode [%s]\n",
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(acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name)));
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Operand is a Reference, Unknown Reference Opcode %X [%s]\n",
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obj_desc->reference.opcode,
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(acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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}
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break;
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default:
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/* Invalid descriptor */
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Invalid descriptor %p [%s]\n",
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obj_desc, acpi_ut_get_descriptor_name (obj_desc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* Get one argument type, point to the next
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*/
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this_arg_type = GET_CURRENT_ARG_TYPE (arg_types);
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INCREMENT_ARG_LIST (arg_types);
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/*
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* Handle cases where the object does not need to be
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* resolved to a value
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*/
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switch (this_arg_type) {
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case ARGI_REF_OR_STRING: /* Can be a String or Reference */
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if ((ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_OPERAND) &&
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(ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_STRING)) {
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/*
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* String found - the string references a named object and must be
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* resolved to a node
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*/
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goto next_operand;
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}
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/* Else not a string - fall through to the normal Reference case below */
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/*lint -fallthrough */
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case ARGI_REFERENCE: /* References: */
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case ARGI_INTEGER_REF:
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case ARGI_OBJECT_REF:
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case ARGI_DEVICE_REF:
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case ARGI_TARGETREF: /* Allows implicit conversion rules before store */
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case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
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case ARGI_SIMPLE_TARGET: /* Name, Local, or Arg - no implicit conversion */
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/* Need an operand of type ACPI_TYPE_LOCAL_REFERENCE */
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if (ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_NAMED) /* Node (name) ptr OK as-is */ {
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goto next_operand;
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}
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status = acpi_ex_check_object_type (ACPI_TYPE_LOCAL_REFERENCE,
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object_type, obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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if (AML_NAME_OP == obj_desc->reference.opcode) {
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/*
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* Convert an indirect name ptr to direct name ptr and put
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* it on the stack
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*/
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temp_node = obj_desc->reference.object;
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acpi_ut_remove_reference (obj_desc);
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(*stack_ptr) = temp_node;
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}
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goto next_operand;
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case ARGI_DATAREFOBJ: /* Store operator only */
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/*
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* We don't want to resolve index_op reference objects during
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* a store because this would be an implicit de_ref_of operation.
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* Instead, we just want to store the reference object.
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* -- All others must be resolved below.
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*/
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if ((opcode == AML_STORE_OP) &&
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(ACPI_GET_OBJECT_TYPE (*stack_ptr) == ACPI_TYPE_LOCAL_REFERENCE) &&
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((*stack_ptr)->reference.opcode == AML_INDEX_OP)) {
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goto next_operand;
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}
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break;
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default:
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/* All cases covered above */
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break;
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}
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/*
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* Resolve this object to a value
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*/
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status = acpi_ex_resolve_to_value (stack_ptr, walk_state);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Get the resolved object */
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obj_desc = *stack_ptr;
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/*
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* Check the resulting object (value) type
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*/
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switch (this_arg_type) {
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/*
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* For the simple cases, only one type of resolved object
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* is allowed
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*/
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case ARGI_MUTEX:
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/* Need an operand of type ACPI_TYPE_MUTEX */
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type_needed = ACPI_TYPE_MUTEX;
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break;
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case ARGI_EVENT:
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/* Need an operand of type ACPI_TYPE_EVENT */
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type_needed = ACPI_TYPE_EVENT;
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break;
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case ARGI_PACKAGE: /* Package */
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/* Need an operand of type ACPI_TYPE_PACKAGE */
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type_needed = ACPI_TYPE_PACKAGE;
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break;
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case ARGI_ANYTYPE:
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/* Any operand type will do */
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type_needed = ACPI_TYPE_ANY;
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break;
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case ARGI_DDBHANDLE:
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/* Need an operand of type ACPI_TYPE_DDB_HANDLE */
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type_needed = ACPI_TYPE_LOCAL_REFERENCE;
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break;
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/*
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* The more complex cases allow multiple resolved object types
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*/
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case ARGI_INTEGER: /* Number */
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/*
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* Need an operand of type ACPI_TYPE_INTEGER,
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* But we can implicitly convert from a STRING or BUFFER
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* Aka - "Implicit Source Operand Conversion"
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*/
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status = acpi_ex_convert_to_integer (obj_desc, stack_ptr, 16);
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if (ACPI_FAILURE (status)) {
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if (status == AE_TYPE) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name (obj_desc), obj_desc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS (status);
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}
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goto next_operand;
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case ARGI_BUFFER:
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/*
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* Need an operand of type ACPI_TYPE_BUFFER,
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* But we can implicitly convert from a STRING or INTEGER
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* Aka - "Implicit Source Operand Conversion"
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*/
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status = acpi_ex_convert_to_buffer (obj_desc, stack_ptr);
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if (ACPI_FAILURE (status)) {
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if (status == AE_TYPE) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name (obj_desc), obj_desc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS (status);
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}
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goto next_operand;
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case ARGI_STRING:
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/*
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* Need an operand of type ACPI_TYPE_STRING,
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* But we can implicitly convert from a BUFFER or INTEGER
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* Aka - "Implicit Source Operand Conversion"
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*/
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status = acpi_ex_convert_to_string (obj_desc, stack_ptr,
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ACPI_IMPLICIT_CONVERT_HEX);
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if (ACPI_FAILURE (status)) {
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if (status == AE_TYPE) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name (obj_desc), obj_desc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS (status);
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}
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goto next_operand;
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case ARGI_COMPUTEDATA:
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/* Need an operand of type INTEGER, STRING or BUFFER */
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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/* Valid operand */
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name (obj_desc), obj_desc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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goto next_operand;
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case ARGI_BUFFER_OR_STRING:
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/* Need an operand of type STRING or BUFFER */
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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/* Valid operand */
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break;
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case ACPI_TYPE_INTEGER:
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/* Highest priority conversion is to type Buffer */
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status = acpi_ex_convert_to_buffer (obj_desc, stack_ptr);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name (obj_desc), obj_desc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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goto next_operand;
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case ARGI_DATAOBJECT:
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/*
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* ARGI_DATAOBJECT is only used by the size_of operator.
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* Need a buffer, string, package, or ref_of reference.
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*
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* The only reference allowed here is a direct reference to
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* a namespace node.
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*/
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_PACKAGE:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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case ACPI_TYPE_LOCAL_REFERENCE:
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/* Valid operand */
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Needed [Buffer/String/Package/Reference], found [%s] %p\n",
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acpi_ut_get_object_type_name (obj_desc), obj_desc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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goto next_operand;
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|
|
|
|
case ARGI_COMPLEXOBJ:
|
|
|
|
/* Need a buffer or package or (ACPI 2.0) String */
|
|
|
|
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
|
|
case ACPI_TYPE_PACKAGE:
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Needed [Buffer/String/Package], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name (obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
|
|
case ARGI_REGION_OR_FIELD:
|
|
|
|
/* Need an operand of type ACPI_TYPE_REGION or a FIELD in a region */
|
|
|
|
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
|
|
case ACPI_TYPE_REGION:
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Needed [Region/region_field], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name (obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
|
|
case ARGI_DATAREFOBJ:
|
|
|
|
/* Used by the Store() operator only */
|
|
|
|
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
|
|
case ACPI_TYPE_INTEGER:
|
|
case ACPI_TYPE_PACKAGE:
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
case ACPI_TYPE_DDB_HANDLE:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
|
|
if (acpi_gbl_enable_interpreter_slack) {
|
|
/*
|
|
* Enable original behavior of Store(), allowing any and all
|
|
* objects as the source operand. The ACPI spec does not
|
|
* allow this, however.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name (obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
|
|
default:
|
|
|
|
/* Unknown type */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Internal - Unknown ARGI (required operand) type %X\n",
|
|
this_arg_type));
|
|
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the original object was resolved to the
|
|
* required object type (Simple cases only).
|
|
*/
|
|
status = acpi_ex_check_object_type (type_needed,
|
|
ACPI_GET_OBJECT_TYPE (*stack_ptr), *stack_ptr);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
next_operand:
|
|
/*
|
|
* If more operands needed, decrement stack_ptr to point
|
|
* to next operand on stack
|
|
*/
|
|
if (GET_CURRENT_ARG_TYPE (arg_types)) {
|
|
stack_ptr--;
|
|
}
|
|
|
|
} /* while (*Types) */
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|