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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.02/******************************************************************************3 *4 * Module Name: exstoren - AML Interpreter object store support,5 * Store to Node (namespace object)6 *7 * Copyright (C) 2000 - 2023, Intel Corp.8 *9 *****************************************************************************/10 11#include <acpi/acpi.h>12#include "accommon.h"13#include "acinterp.h"14#include "amlcode.h"15 16#define _COMPONENT ACPI_EXECUTER17ACPI_MODULE_NAME("exstoren")18 19/*******************************************************************************20 *21 * FUNCTION: acpi_ex_resolve_object22 *23 * PARAMETERS: source_desc_ptr - Pointer to the source object24 * target_type - Current type of the target25 * walk_state - Current walk state26 *27 * RETURN: Status, resolved object in source_desc_ptr.28 *29 * DESCRIPTION: Resolve an object. If the object is a reference, dereference30 * it and return the actual object in the source_desc_ptr.31 *32 ******************************************************************************/33acpi_status34acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,35 acpi_object_type target_type,36 struct acpi_walk_state *walk_state)37{38 union acpi_operand_object *source_desc = *source_desc_ptr;39 acpi_status status = AE_OK;40 41 ACPI_FUNCTION_TRACE(ex_resolve_object);42 43 /* Ensure we have a Target that can be stored to */44 45 switch (target_type) {46 case ACPI_TYPE_BUFFER_FIELD:47 case ACPI_TYPE_LOCAL_REGION_FIELD:48 case ACPI_TYPE_LOCAL_BANK_FIELD:49 case ACPI_TYPE_LOCAL_INDEX_FIELD:50 /*51 * These cases all require only Integers or values that52 * can be converted to Integers (Strings or Buffers)53 */54 case ACPI_TYPE_INTEGER:55 case ACPI_TYPE_STRING:56 case ACPI_TYPE_BUFFER:57 /*58 * Stores into a Field/Region or into a Integer/Buffer/String59 * are all essentially the same. This case handles the60 * "interchangeable" types Integer, String, and Buffer.61 */62 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) {63 64 /* Resolve a reference object first */65 66 status =67 acpi_ex_resolve_to_value(source_desc_ptr,68 walk_state);69 if (ACPI_FAILURE(status)) {70 break;71 }72 }73 74 /* For copy_object, no further validation necessary */75 76 if (walk_state->opcode == AML_COPY_OBJECT_OP) {77 break;78 }79 80 /* Must have a Integer, Buffer, or String */81 82 if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&83 (source_desc->common.type != ACPI_TYPE_BUFFER) &&84 (source_desc->common.type != ACPI_TYPE_STRING) &&85 !((source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&86 (source_desc->reference.class == ACPI_REFCLASS_TABLE))) {87 88 /* Conversion successful but still not a valid type */89 90 ACPI_ERROR((AE_INFO,91 "Cannot assign type [%s] to [%s] (must be type Int/Str/Buf)",92 acpi_ut_get_object_type_name(source_desc),93 acpi_ut_get_type_name(target_type)));94 95 status = AE_AML_OPERAND_TYPE;96 }97 break;98 99 case ACPI_TYPE_LOCAL_ALIAS:100 case ACPI_TYPE_LOCAL_METHOD_ALIAS:101 /*102 * All aliases should have been resolved earlier, during the103 * operand resolution phase.104 */105 ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));106 status = AE_AML_INTERNAL;107 break;108 109 case ACPI_TYPE_PACKAGE:110 default:111 /*112 * All other types than Alias and the various Fields come here,113 * including the untyped case - ACPI_TYPE_ANY.114 */115 break;116 }117 118 return_ACPI_STATUS(status);119}120 121/*******************************************************************************122 *123 * FUNCTION: acpi_ex_store_object_to_object124 *125 * PARAMETERS: source_desc - Object to store126 * dest_desc - Object to receive a copy of the source127 * new_desc - New object if dest_desc is obsoleted128 * walk_state - Current walk state129 *130 * RETURN: Status131 *132 * DESCRIPTION: "Store" an object to another object. This may include133 * converting the source type to the target type (implicit134 * conversion), and a copy of the value of the source to135 * the target.136 *137 * The Assignment of an object to another (not named) object138 * is handled here.139 * The Source passed in will replace the current value (if any)140 * with the input value.141 *142 * When storing into an object the data is converted to the143 * target object type then stored in the object. This means144 * that the target object type (for an initialized target) will145 * not be changed by a store operation.146 *147 * This module allows destination types of Number, String,148 * Buffer, and Package.149 *150 * Assumes parameters are already validated. NOTE: source_desc151 * resolution (from a reference object) must be performed by152 * the caller if necessary.153 *154 ******************************************************************************/155 156acpi_status157acpi_ex_store_object_to_object(union acpi_operand_object *source_desc,158 union acpi_operand_object *dest_desc,159 union acpi_operand_object **new_desc,160 struct acpi_walk_state *walk_state)161{162 union acpi_operand_object *actual_src_desc;163 acpi_status status = AE_OK;164 165 ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);166 167 actual_src_desc = source_desc;168 if (!dest_desc) {169 /*170 * There is no destination object (An uninitialized node or171 * package element), so we can simply copy the source object172 * creating a new destination object173 */174 status =175 acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,176 walk_state);177 return_ACPI_STATUS(status);178 }179 180 if (source_desc->common.type != dest_desc->common.type) {181 /*182 * The source type does not match the type of the destination.183 * Perform the "implicit conversion" of the source to the current type184 * of the target as per the ACPI specification.185 *186 * If no conversion performed, actual_src_desc = source_desc.187 * Otherwise, actual_src_desc is a temporary object to hold the188 * converted object.189 */190 status = acpi_ex_convert_to_target_type(dest_desc->common.type,191 source_desc,192 &actual_src_desc,193 walk_state);194 if (ACPI_FAILURE(status)) {195 return_ACPI_STATUS(status);196 }197 198 if (source_desc == actual_src_desc) {199 /*200 * No conversion was performed. Return the source_desc as the201 * new object.202 */203 *new_desc = source_desc;204 return_ACPI_STATUS(AE_OK);205 }206 }207 208 /*209 * We now have two objects of identical types, and we can perform a210 * copy of the *value* of the source object.211 */212 switch (dest_desc->common.type) {213 case ACPI_TYPE_INTEGER:214 215 dest_desc->integer.value = actual_src_desc->integer.value;216 217 /* Truncate value if we are executing from a 32-bit ACPI table */218 219 (void)acpi_ex_truncate_for32bit_table(dest_desc);220 break;221 222 case ACPI_TYPE_STRING:223 224 status =225 acpi_ex_store_string_to_string(actual_src_desc, dest_desc);226 break;227 228 case ACPI_TYPE_BUFFER:229 230 status =231 acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);232 break;233 234 case ACPI_TYPE_PACKAGE:235 236 status =237 acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,238 walk_state);239 break;240 241 default:242 /*243 * All other types come here.244 */245 ACPI_WARNING((AE_INFO, "Store into type [%s] not implemented",246 acpi_ut_get_object_type_name(dest_desc)));247 248 status = AE_NOT_IMPLEMENTED;249 break;250 }251 252 if (actual_src_desc != source_desc) {253 254 /* Delete the intermediate (temporary) source object */255 256 acpi_ut_remove_reference(actual_src_desc);257 }258 259 *new_desc = dest_desc;260 return_ACPI_STATUS(status);261}262