Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /****************************************************************************** |
| 3 | * |
| 4 | * Module Name: exresnte - AML Interpreter object resolution |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/acdispat.h> |
| 47 | #include <acpi/acinterp.h> |
| 48 | #include <acpi/acnamesp.h> |
| 49 | #include <acpi/acparser.h> |
| 50 | #include <acpi/amlcode.h> |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #define _COMPONENT ACPI_EXECUTER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 53 | ACPI_MODULE_NAME("exresnte") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | /******************************************************************************* |
| 56 | * |
| 57 | * FUNCTION: acpi_ex_resolve_node_to_value |
| 58 | * |
| 59 | * PARAMETERS: object_ptr - Pointer to a location that contains |
| 60 | * a pointer to a NS node, and will receive a |
| 61 | * pointer to the resolved object. |
| 62 | * walk_state - Current state. Valid only if executing AML |
| 63 | * code. NULL if simply resolving an object |
| 64 | * |
| 65 | * RETURN: Status |
| 66 | * |
| 67 | * DESCRIPTION: Resolve a Namespace node to a valued object |
| 68 | * |
| 69 | * Note: for some of the data types, the pointer attached to the Node |
| 70 | * can be either a pointer to an actual internal object or a pointer into the |
| 71 | * AML stream itself. These types are currently: |
| 72 | * |
| 73 | * ACPI_TYPE_INTEGER |
| 74 | * ACPI_TYPE_STRING |
| 75 | * ACPI_TYPE_BUFFER |
| 76 | * ACPI_TYPE_MUTEX |
| 77 | * ACPI_TYPE_PACKAGE |
| 78 | * |
| 79 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 81 | acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr, |
| 82 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | acpi_status status = AE_OK; |
| 85 | union acpi_operand_object *source_desc; |
| 86 | union acpi_operand_object *obj_desc = NULL; |
| 87 | struct acpi_namespace_node *node; |
| 88 | acpi_object_type entry_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 90 | ACPI_FUNCTION_TRACE("ex_resolve_node_to_value"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | /* |
| 93 | * The stack pointer points to a struct acpi_namespace_node (Node). Get the |
| 94 | * object that is attached to the Node. |
| 95 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | node = *object_ptr; |
| 97 | source_desc = acpi_ns_get_attached_object(node); |
| 98 | entry_type = acpi_ns_get_type((acpi_handle) node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Entry=%p source_desc=%p [%s]\n", |
| 101 | node, source_desc, |
| 102 | acpi_ut_get_type_name(entry_type))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 105 | (entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | /* There is always exactly one level of indirection */ |
| 107 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 108 | node = ACPI_CAST_PTR(struct acpi_namespace_node, node->object); |
| 109 | source_desc = acpi_ns_get_attached_object(node); |
| 110 | entry_type = acpi_ns_get_type((acpi_handle) node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | *object_ptr = node; |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Several object types require no further processing: |
| 116 | * 1) Devices rarely have an attached object, return the Node |
| 117 | * 2) Method locals and arguments have a pseudo-Node |
| 118 | */ |
| 119 | if (entry_type == ACPI_TYPE_DEVICE || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) { |
| 121 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | if (!source_desc) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 125 | ACPI_ERROR((AE_INFO, "No object attached to node %p", node)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Action is based on the type of the Node, which indicates the type |
| 131 | * of the attached object or pointer |
| 132 | */ |
| 133 | switch (entry_type) { |
| 134 | case ACPI_TYPE_PACKAGE: |
| 135 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 136 | if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_PACKAGE) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 137 | ACPI_ERROR((AE_INFO, "Object not a Package, type %s", |
| 138 | acpi_ut_get_object_type_name(source_desc))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
| 141 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 142 | status = acpi_ds_get_package_arguments(source_desc); |
| 143 | if (ACPI_SUCCESS(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | /* Return an additional reference to the object */ |
| 145 | |
| 146 | obj_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 147 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | } |
| 149 | break; |
| 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | case ACPI_TYPE_BUFFER: |
| 152 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_BUFFER) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 154 | ACPI_ERROR((AE_INFO, "Object not a Buffer, type %s", |
| 155 | acpi_ut_get_object_type_name(source_desc))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 159 | status = acpi_ds_get_buffer_arguments(source_desc); |
| 160 | if (ACPI_SUCCESS(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | /* Return an additional reference to the object */ |
| 162 | |
| 163 | obj_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | } |
| 166 | break; |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | case ACPI_TYPE_STRING: |
| 169 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 170 | if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_STRING) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 171 | ACPI_ERROR((AE_INFO, "Object not a String, type %s", |
| 172 | acpi_ut_get_object_type_name(source_desc))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | /* Return an additional reference to the object */ |
| 177 | |
| 178 | obj_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 179 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | break; |
| 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | case ACPI_TYPE_INTEGER: |
| 183 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_INTEGER) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 185 | ACPI_ERROR((AE_INFO, "Object not a Integer, type %s", |
| 186 | acpi_ut_get_object_type_name(source_desc))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | /* Return an additional reference to the object */ |
| 191 | |
| 192 | obj_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 193 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | break; |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | case ACPI_TYPE_BUFFER_FIELD: |
| 197 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 198 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 199 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 200 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 202 | "field_read Node=%p source_desc=%p Type=%X\n", |
| 203 | node, source_desc, entry_type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 205 | status = |
| 206 | acpi_ex_read_data_from_field(walk_state, source_desc, |
| 207 | &obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | break; |
| 209 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 210 | /* For these objects, just return the object attached to the Node */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | case ACPI_TYPE_MUTEX: |
| 213 | case ACPI_TYPE_METHOD: |
| 214 | case ACPI_TYPE_POWER: |
| 215 | case ACPI_TYPE_PROCESSOR: |
| 216 | case ACPI_TYPE_THERMAL: |
| 217 | case ACPI_TYPE_EVENT: |
| 218 | case ACPI_TYPE_REGION: |
| 219 | |
| 220 | /* Return an additional reference to the object */ |
| 221 | |
| 222 | obj_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 223 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | break; |
| 225 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 226 | /* TYPE_ANY is untyped, and thus there is no object associated with it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
| 228 | case ACPI_TYPE_ANY: |
| 229 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 230 | ACPI_ERROR((AE_INFO, |
| 231 | "Untyped entry %p, no attached object!", node)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 233 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
| 235 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 236 | |
| 237 | switch (source_desc->reference.opcode) { |
| 238 | case AML_LOAD_OP: |
| 239 | |
| 240 | /* This is a ddb_handle */ |
| 241 | /* Return an additional reference to the object */ |
| 242 | |
| 243 | obj_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | break; |
| 246 | |
| 247 | default: |
| 248 | /* No named references are allowed here */ |
| 249 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 250 | ACPI_ERROR((AE_INFO, |
| 251 | "Unsupported Reference opcode %X (%s)", |
| 252 | source_desc->reference.opcode, |
| 253 | acpi_ps_get_opcode_name(source_desc-> |
| 254 | reference.opcode))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 256 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | break; |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | default: |
| 261 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 262 | /* Default case is for unknown types */ |
| 263 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 264 | ACPI_ERROR((AE_INFO, |
| 265 | "Node %p - Unknown object type %X", |
| 266 | node, entry_type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 268 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 270 | } /* switch (entry_type) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 272 | /* Return the object descriptor */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 274 | *object_ptr = (void *)obj_desc; |
| 275 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |