LCOV - code coverage report
Current view: top level - drivers/acpi/acpica - exstoren.c (source / functions) Hit Total Coverage
Test: combined.info Lines: 9 62 14.5 %
Date: 2022-04-01 13:59:58 Functions: 1 2 50.0 %
Branches: 4 30 13.3 %

           Branch data     Line data    Source code
       1                 :            : // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
       2                 :            : /******************************************************************************
       3                 :            :  *
       4                 :            :  * Module Name: exstoren - AML Interpreter object store support,
       5                 :            :  *                        Store to Node (namespace object)
       6                 :            :  *
       7                 :            :  * Copyright (C) 2000 - 2020, 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_EXECUTER
      17                 :            : ACPI_MODULE_NAME("exstoren")
      18                 :            : 
      19                 :            : /*******************************************************************************
      20                 :            :  *
      21                 :            :  * FUNCTION:    acpi_ex_resolve_object
      22                 :            :  *
      23                 :            :  * PARAMETERS:  source_desc_ptr     - Pointer to the source object
      24                 :            :  *              target_type         - Current type of the target
      25                 :            :  *              walk_state          - Current walk state
      26                 :            :  *
      27                 :            :  * RETURN:      Status, resolved object in source_desc_ptr.
      28                 :            :  *
      29                 :            :  * DESCRIPTION: Resolve an object. If the object is a reference, dereference
      30                 :            :  *              it and return the actual object in the source_desc_ptr.
      31                 :            :  *
      32                 :            :  ******************************************************************************/
      33                 :            : acpi_status
      34                 :       1326 : acpi_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                 :       1326 :         union acpi_operand_object *source_desc = *source_desc_ptr;
      39                 :       1326 :         acpi_status status = AE_OK;
      40                 :            : 
      41                 :       1326 :         ACPI_FUNCTION_TRACE(ex_resolve_object);
      42                 :            : 
      43                 :            :         /* Ensure we have a Target that can be stored to */
      44                 :            : 
      45      [ +  -  - ]:       1326 :         switch (target_type) {
      46                 :       1326 :         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 that
      52                 :            :                  * 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/String
      59                 :            :                  * are all essentially the same. This case handles the
      60                 :            :                  * "interchangeable" types Integer, String, and Buffer.
      61                 :            :                  */
      62         [ -  + ]:       1326 :                 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
      63                 :            : 
      64                 :            :                         /* Resolve a reference object first */
      65                 :            : 
      66                 :          0 :                         status =
      67                 :          0 :                             acpi_ex_resolve_to_value(source_desc_ptr,
      68                 :            :                                                      walk_state);
      69         [ #  # ]:          0 :                         if (ACPI_FAILURE(status)) {
      70                 :            :                                 break;
      71                 :            :                         }
      72                 :            :                 }
      73                 :            : 
      74                 :            :                 /* For copy_object, no further validation necessary */
      75                 :            : 
      76         [ -  + ]:       1326 :                 if (walk_state->opcode == AML_COPY_OBJECT_OP) {
      77                 :            :                         break;
      78                 :            :                 }
      79                 :            : 
      80                 :            :                 /* Must have a Integer, Buffer, or String */
      81                 :            : 
      82         [ -  + ]:       1326 :                 if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&
      83         [ #  # ]:          0 :                     (source_desc->common.type != ACPI_TYPE_BUFFER) &&
      84                 :          0 :                     (source_desc->common.type != ACPI_TYPE_STRING) &&
      85         [ #  # ]:          0 :                     !((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                 :          0 :                         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                 :          0 :                         status = AE_AML_OPERAND_TYPE;
      96                 :            :                 }
      97                 :            :                 break;
      98                 :            : 
      99                 :          0 :         case ACPI_TYPE_LOCAL_ALIAS:
     100                 :            :         case ACPI_TYPE_LOCAL_METHOD_ALIAS:
     101                 :            :                 /*
     102                 :            :                  * All aliases should have been resolved earlier, during the
     103                 :            :                  * operand resolution phase.
     104                 :            :                  */
     105                 :          0 :                 ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));
     106                 :          0 :                 status = AE_AML_INTERNAL;
     107                 :          0 :                 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                 :          0 :         return_ACPI_STATUS(status);
     119                 :            : }
     120                 :            : 
     121                 :            : /*******************************************************************************
     122                 :            :  *
     123                 :            :  * FUNCTION:    acpi_ex_store_object_to_object
     124                 :            :  *
     125                 :            :  * PARAMETERS:  source_desc         - Object to store
     126                 :            :  *              dest_desc           - Object to receive a copy of the source
     127                 :            :  *              new_desc            - New object if dest_desc is obsoleted
     128                 :            :  *              walk_state          - Current walk state
     129                 :            :  *
     130                 :            :  * RETURN:      Status
     131                 :            :  *
     132                 :            :  * DESCRIPTION: "Store" an object to another object. This may include
     133                 :            :  *              converting the source type to the target type (implicit
     134                 :            :  *              conversion), and a copy of the value of the source to
     135                 :            :  *              the target.
     136                 :            :  *
     137                 :            :  *              The Assignment of an object to another (not named) object
     138                 :            :  *              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 the
     143                 :            :  *              target object type then stored in the object. This means
     144                 :            :  *              that the target object type (for an initialized target) will
     145                 :            :  *              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_desc
     151                 :            :  *              resolution (from a reference object) must be performed by
     152                 :            :  *              the caller if necessary.
     153                 :            :  *
     154                 :            :  ******************************************************************************/
     155                 :            : 
     156                 :            : acpi_status
     157                 :          0 : acpi_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                 :          0 :         union acpi_operand_object *actual_src_desc;
     163                 :          0 :         acpi_status status = AE_OK;
     164                 :            : 
     165                 :          0 :         ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);
     166                 :            : 
     167                 :          0 :         actual_src_desc = source_desc;
     168         [ #  # ]:          0 :         if (!dest_desc) {
     169                 :            :                 /*
     170                 :            :                  * There is no destination object (An uninitialized node or
     171                 :            :                  * package element), so we can simply copy the source object
     172                 :            :                  * creating a new destination object
     173                 :            :                  */
     174                 :          0 :                 status =
     175                 :          0 :                     acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,
     176                 :            :                                                     walk_state);
     177                 :          0 :                 return_ACPI_STATUS(status);
     178                 :            :         }
     179                 :            : 
     180         [ #  # ]:          0 :         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 type
     184                 :            :                  * 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 the
     188                 :            :                  * converted object.
     189                 :            :                  */
     190                 :          0 :                 status = acpi_ex_convert_to_target_type(dest_desc->common.type,
     191                 :            :                                                         source_desc,
     192                 :            :                                                         &actual_src_desc,
     193                 :            :                                                         walk_state);
     194         [ #  # ]:          0 :                 if (ACPI_FAILURE(status)) {
     195                 :            :                         return_ACPI_STATUS(status);
     196                 :            :                 }
     197                 :            : 
     198         [ #  # ]:          0 :                 if (source_desc == actual_src_desc) {
     199                 :            :                         /*
     200                 :            :                          * No conversion was performed. Return the source_desc as the
     201                 :            :                          * new object.
     202                 :            :                          */
     203                 :          0 :                         *new_desc = source_desc;
     204                 :          0 :                         return_ACPI_STATUS(AE_OK);
     205                 :            :                 }
     206                 :            :         }
     207                 :            : 
     208                 :            :         /*
     209                 :            :          * We now have two objects of identical types, and we can perform a
     210                 :            :          * copy of the *value* of the source object.
     211                 :            :          */
     212   [ #  #  #  #  :          0 :         switch (dest_desc->common.type) {
                      # ]
     213                 :          0 :         case ACPI_TYPE_INTEGER:
     214                 :            : 
     215                 :          0 :                 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                 :          0 :                 (void)acpi_ex_truncate_for32bit_table(dest_desc);
     220                 :          0 :                 break;
     221                 :            : 
     222                 :          0 :         case ACPI_TYPE_STRING:
     223                 :            : 
     224                 :          0 :                 status =
     225                 :          0 :                     acpi_ex_store_string_to_string(actual_src_desc, dest_desc);
     226                 :          0 :                 break;
     227                 :            : 
     228                 :          0 :         case ACPI_TYPE_BUFFER:
     229                 :            : 
     230                 :          0 :                 status =
     231                 :          0 :                     acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);
     232                 :          0 :                 break;
     233                 :            : 
     234                 :          0 :         case ACPI_TYPE_PACKAGE:
     235                 :            : 
     236                 :          0 :                 status =
     237                 :          0 :                     acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,
     238                 :            :                                                     walk_state);
     239                 :          0 :                 break;
     240                 :            : 
     241                 :          0 :         default:
     242                 :            :                 /*
     243                 :            :                  * All other types come here.
     244                 :            :                  */
     245                 :          0 :                 ACPI_WARNING((AE_INFO, "Store into type [%s] not implemented",
     246                 :            :                               acpi_ut_get_object_type_name(dest_desc)));
     247                 :            : 
     248                 :          0 :                 status = AE_NOT_IMPLEMENTED;
     249                 :          0 :                 break;
     250                 :            :         }
     251                 :            : 
     252         [ #  # ]:          0 :         if (actual_src_desc != source_desc) {
     253                 :            : 
     254                 :            :                 /* Delete the intermediate (temporary) source object */
     255                 :            : 
     256                 :          0 :                 acpi_ut_remove_reference(actual_src_desc);
     257                 :            :         }
     258                 :            : 
     259                 :          0 :         *new_desc = dest_desc;
     260                 :          0 :         return_ACPI_STATUS(status);
     261                 :            : }

Generated by: LCOV version 1.14