Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /****************************************************************************** |
| 3 | * |
| 4 | * Module Name: exresolv - AML Interpreter object resolution |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
| 9 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 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/amlcode.h> |
| 47 | #include <acpi/acdispat.h> |
| 48 | #include <acpi/acinterp.h> |
| 49 | #include <acpi/acnamesp.h> |
| 50 | #include <acpi/acparser.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("exresolv") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | /* Local prototypes */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 56 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr, |
| 58 | struct acpi_walk_state *walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /******************************************************************************* |
| 61 | * |
| 62 | * FUNCTION: acpi_ex_resolve_to_value |
| 63 | * |
| 64 | * PARAMETERS: **stack_ptr - Points to entry on obj_stack, which can |
| 65 | * be either an (union acpi_operand_object *) |
| 66 | * or an acpi_handle. |
| 67 | * walk_state - Current method state |
| 68 | * |
| 69 | * RETURN: Status |
| 70 | * |
| 71 | * DESCRIPTION: Convert Reference objects to values |
| 72 | * |
| 73 | ******************************************************************************/ |
| 74 | |
| 75 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 76 | acpi_ex_resolve_to_value(union acpi_operand_object **stack_ptr, |
| 77 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 81 | ACPI_FUNCTION_TRACE_PTR("ex_resolve_to_value", stack_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | if (!stack_ptr || !*stack_ptr) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Internal - null pointer\n")); |
| 85 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | /* |
| 89 | * The entity pointed to by the stack_ptr can be either |
| 90 | * 1) A valid union acpi_operand_object, or |
| 91 | * 2) A struct acpi_namespace_node (named_obj) |
| 92 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 93 | if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_OPERAND) { |
| 94 | status = acpi_ex_resolve_object_to_value(stack_ptr, walk_state); |
| 95 | if (ACPI_FAILURE(status)) { |
| 96 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 98 | |
| 99 | if (!*stack_ptr) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 101 | "Internal - null pointer\n")); |
| 102 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Object on the stack may have changed if acpi_ex_resolve_object_to_value() |
| 108 | * was called (i.e., we can't use an _else_ here.) |
| 109 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 110 | if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_NAMED) { |
| 111 | status = |
| 112 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR |
| 113 | (struct acpi_namespace_node, |
| 114 | stack_ptr), walk_state); |
| 115 | if (ACPI_FAILURE(status)) { |
| 116 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | } |
| 119 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr)); |
| 121 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | /******************************************************************************* |
| 125 | * |
| 126 | * FUNCTION: acpi_ex_resolve_object_to_value |
| 127 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 128 | * PARAMETERS: stack_ptr - Pointer to an internal object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | * walk_state - Current method state |
| 130 | * |
| 131 | * RETURN: Status |
| 132 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 133 | * DESCRIPTION: Retrieve the value from an internal object. The Reference type |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | * uses the associated AML opcode to determine the value. |
| 135 | * |
| 136 | ******************************************************************************/ |
| 137 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 138 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr, |
| 140 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 142 | acpi_status status = AE_OK; |
| 143 | union acpi_operand_object *stack_desc; |
| 144 | void *temp_node; |
| 145 | union acpi_operand_object *obj_desc; |
| 146 | u16 opcode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | ACPI_FUNCTION_TRACE("ex_resolve_object_to_value"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | stack_desc = *stack_ptr; |
| 151 | |
| 152 | /* This is an union acpi_operand_object */ |
| 153 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 154 | switch (ACPI_GET_OBJECT_TYPE(stack_desc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 156 | |
| 157 | opcode = stack_desc->reference.opcode; |
| 158 | |
| 159 | switch (opcode) { |
| 160 | case AML_NAME_OP: |
| 161 | |
| 162 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 163 | * Convert name reference to a namespace node |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | * Then, acpi_ex_resolve_node_to_value can be used to get the value |
| 165 | */ |
| 166 | temp_node = stack_desc->reference.object; |
| 167 | |
| 168 | /* Delete the Reference Object */ |
| 169 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 170 | acpi_ut_remove_reference(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 172 | /* Return the namespace node */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | (*stack_ptr) = temp_node; |
| 175 | break; |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | case AML_LOCAL_OP: |
| 178 | case AML_ARG_OP: |
| 179 | |
| 180 | /* |
| 181 | * Get the local from the method's state info |
| 182 | * Note: this increments the local's object reference count |
| 183 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | status = acpi_ds_method_data_get_value(opcode, |
| 185 | stack_desc-> |
| 186 | reference.offset, |
| 187 | walk_state, |
| 188 | &obj_desc); |
| 189 | if (ACPI_FAILURE(status)) { |
| 190 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 193 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 194 | "[Arg/Local %X] value_obj is %p\n", |
| 195 | stack_desc->reference.offset, |
| 196 | obj_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
| 198 | /* |
| 199 | * Now we can delete the original Reference Object and |
| 200 | * replace it with the resolved value |
| 201 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 202 | acpi_ut_remove_reference(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | *stack_ptr = obj_desc; |
| 204 | break; |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | case AML_INDEX_OP: |
| 207 | |
| 208 | switch (stack_desc->reference.target_type) { |
| 209 | case ACPI_TYPE_BUFFER_FIELD: |
| 210 | |
| 211 | /* Just return - leave the Reference on the stack */ |
| 212 | break; |
| 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | case ACPI_TYPE_PACKAGE: |
| 215 | |
| 216 | obj_desc = *stack_desc->reference.where; |
| 217 | if (obj_desc) { |
| 218 | /* |
| 219 | * Valid obj descriptor, copy pointer to return value |
| 220 | * (i.e., dereference the package index) |
| 221 | * Delete the ref object, increment the returned object |
| 222 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 223 | acpi_ut_remove_reference(stack_desc); |
| 224 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | *stack_ptr = obj_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 226 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | /* |
| 228 | * A NULL object descriptor means an unitialized element of |
| 229 | * the package, can't dereference it |
| 230 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 231 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 232 | "Attempt to deref an Index to NULL pkg element Idx=%p\n", |
| 233 | stack_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | status = AE_AML_UNINITIALIZED_ELEMENT; |
| 235 | } |
| 236 | break; |
| 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | default: |
| 239 | |
| 240 | /* Invalid reference object */ |
| 241 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 242 | ACPI_REPORT_ERROR(("During resolve, Unknown target_type %X in Index/Reference obj %p\n", stack_desc->reference.target_type, stack_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | status = AE_AML_INTERNAL; |
| 244 | break; |
| 245 | } |
| 246 | break; |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | case AML_REF_OF_OP: |
| 249 | case AML_DEBUG_OP: |
| 250 | case AML_LOAD_OP: |
| 251 | |
| 252 | /* Just leave the object as-is */ |
| 253 | |
| 254 | break; |
| 255 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 256 | case AML_INT_NAMEPATH_OP: /* Reference to a named object */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 257 | |
| 258 | /* Get the object pointed to by the namespace node */ |
| 259 | |
| 260 | *stack_ptr = (stack_desc->reference.node)->object; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 261 | acpi_ut_add_reference(*stack_ptr); |
| 262 | acpi_ut_remove_reference(stack_desc); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 263 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | default: |
| 266 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 267 | ACPI_REPORT_ERROR(("During resolve, Unknown Reference opcode %X (%s) in %p\n", opcode, acpi_ps_get_opcode_name(opcode), stack_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | status = AE_AML_INTERNAL; |
| 269 | break; |
| 270 | } |
| 271 | break; |
| 272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | case ACPI_TYPE_BUFFER: |
| 274 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 275 | status = acpi_ds_get_buffer_arguments(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | break; |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | case ACPI_TYPE_PACKAGE: |
| 279 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 280 | status = acpi_ds_get_package_arguments(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | break; |
| 282 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 283 | /* These cases may never happen here, but just in case.. */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | case ACPI_TYPE_BUFFER_FIELD: |
| 286 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 287 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 288 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 289 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 291 | "field_read source_desc=%p Type=%X\n", |
| 292 | stack_desc, |
| 293 | ACPI_GET_OBJECT_TYPE(stack_desc))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 295 | status = |
| 296 | acpi_ex_read_data_from_field(walk_state, stack_desc, |
| 297 | &obj_desc); |
| 298 | *stack_ptr = (void *)obj_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | break; |
| 300 | |
| 301 | default: |
| 302 | break; |
| 303 | } |
| 304 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 305 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /******************************************************************************* |
| 309 | * |
| 310 | * FUNCTION: acpi_ex_resolve_multiple |
| 311 | * |
| 312 | * PARAMETERS: walk_state - Current state (contains AML opcode) |
| 313 | * Operand - Starting point for resolution |
| 314 | * return_type - Where the object type is returned |
| 315 | * return_desc - Where the resolved object is returned |
| 316 | * |
| 317 | * RETURN: Status |
| 318 | * |
| 319 | * DESCRIPTION: Return the base object and type. Traverse a reference list if |
| 320 | * necessary to get to the base object. |
| 321 | * |
| 322 | ******************************************************************************/ |
| 323 | |
| 324 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 325 | acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state, |
| 326 | union acpi_operand_object *operand, |
| 327 | acpi_object_type * return_type, |
| 328 | union acpi_operand_object **return_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 330 | union acpi_operand_object *obj_desc = (void *)operand; |
| 331 | struct acpi_namespace_node *node; |
| 332 | acpi_object_type type; |
| 333 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 335 | ACPI_FUNCTION_TRACE("acpi_ex_resolve_multiple"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 337 | /* Operand can be either a namespace node or an operand descriptor */ |
| 338 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 339 | switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | case ACPI_DESC_TYPE_OPERAND: |
| 341 | type = obj_desc->common.type; |
| 342 | break; |
| 343 | |
| 344 | case ACPI_DESC_TYPE_NAMED: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 345 | type = ((struct acpi_namespace_node *)obj_desc)->type; |
| 346 | obj_desc = |
| 347 | acpi_ns_get_attached_object((struct acpi_namespace_node *) |
| 348 | obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
| 350 | /* If we had an Alias node, use the attached object for type info */ |
| 351 | |
| 352 | if (type == ACPI_TYPE_LOCAL_ALIAS) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 353 | type = ((struct acpi_namespace_node *)obj_desc)->type; |
| 354 | obj_desc = |
| 355 | acpi_ns_get_attached_object((struct |
| 356 | acpi_namespace_node *) |
| 357 | obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
| 359 | break; |
| 360 | |
| 361 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 362 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
| 364 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 365 | /* If type is anything other than a reference, we are done */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | if (type != ACPI_TYPE_LOCAL_REFERENCE) { |
| 368 | goto exit; |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * For reference objects created via the ref_of or Index operators, |
| 373 | * we need to get to the base object (as per the ACPI specification |
| 374 | * of the object_type and size_of operators). This means traversing |
| 375 | * the list of possibly many nested references. |
| 376 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 377 | while (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | switch (obj_desc->reference.opcode) { |
| 379 | case AML_REF_OF_OP: |
| 380 | |
| 381 | /* Dereference the reference pointer */ |
| 382 | |
| 383 | node = obj_desc->reference.object; |
| 384 | |
| 385 | /* All "References" point to a NS node */ |
| 386 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 387 | if (ACPI_GET_DESCRIPTOR_TYPE(node) != |
| 388 | ACPI_DESC_TYPE_NAMED) { |
| 389 | ACPI_REPORT_ERROR(("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n", node, acpi_ut_get_descriptor_name(node))); |
| 390 | return_ACPI_STATUS(AE_AML_INTERNAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | /* Get the attached object */ |
| 394 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 395 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (!obj_desc) { |
| 397 | /* No object, use the NS node type */ |
| 398 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 399 | type = acpi_ns_get_type(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | goto exit; |
| 401 | } |
| 402 | |
| 403 | /* Check for circular references */ |
| 404 | |
| 405 | if (obj_desc == operand) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 406 | return_ACPI_STATUS(AE_AML_CIRCULAR_REFERENCE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | break; |
| 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | case AML_INDEX_OP: |
| 411 | |
| 412 | /* Get the type of this reference (index into another object) */ |
| 413 | |
| 414 | type = obj_desc->reference.target_type; |
| 415 | if (type != ACPI_TYPE_PACKAGE) { |
| 416 | goto exit; |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * The main object is a package, we want to get the type |
| 421 | * of the individual package element that is referenced by |
| 422 | * the index. |
| 423 | * |
| 424 | * This could of course in turn be another reference object. |
| 425 | */ |
| 426 | obj_desc = *(obj_desc->reference.where); |
| 427 | if (!obj_desc) { |
| 428 | /* NULL package elements are allowed */ |
| 429 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 430 | type = 0; /* Uninitialized */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | goto exit; |
| 432 | } |
| 433 | break; |
| 434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | case AML_INT_NAMEPATH_OP: |
| 436 | |
| 437 | /* Dereference the reference pointer */ |
| 438 | |
| 439 | node = obj_desc->reference.node; |
| 440 | |
| 441 | /* All "References" point to a NS node */ |
| 442 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 443 | if (ACPI_GET_DESCRIPTOR_TYPE(node) != |
| 444 | ACPI_DESC_TYPE_NAMED) { |
| 445 | ACPI_REPORT_ERROR(("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n", node, acpi_ut_get_descriptor_name(node))); |
| 446 | return_ACPI_STATUS(AE_AML_INTERNAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | /* Get the attached object */ |
| 450 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 451 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (!obj_desc) { |
| 453 | /* No object, use the NS node type */ |
| 454 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 455 | type = acpi_ns_get_type(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | goto exit; |
| 457 | } |
| 458 | |
| 459 | /* Check for circular references */ |
| 460 | |
| 461 | if (obj_desc == operand) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 462 | return_ACPI_STATUS(AE_AML_CIRCULAR_REFERENCE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |
| 464 | break; |
| 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | case AML_LOCAL_OP: |
| 467 | case AML_ARG_OP: |
| 468 | |
| 469 | if (return_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 470 | status = |
| 471 | acpi_ds_method_data_get_value(obj_desc-> |
| 472 | reference. |
| 473 | opcode, |
| 474 | obj_desc-> |
| 475 | reference. |
| 476 | offset, |
| 477 | walk_state, |
| 478 | &obj_desc); |
| 479 | if (ACPI_FAILURE(status)) { |
| 480 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 482 | acpi_ut_remove_reference(obj_desc); |
| 483 | } else { |
| 484 | status = |
| 485 | acpi_ds_method_data_get_node(obj_desc-> |
| 486 | reference. |
| 487 | opcode, |
| 488 | obj_desc-> |
| 489 | reference. |
| 490 | offset, |
| 491 | walk_state, |
| 492 | &node); |
| 493 | if (ACPI_FAILURE(status)) { |
| 494 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 497 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (!obj_desc) { |
| 499 | type = ACPI_TYPE_ANY; |
| 500 | goto exit; |
| 501 | } |
| 502 | } |
| 503 | break; |
| 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | case AML_DEBUG_OP: |
| 506 | |
| 507 | /* The Debug Object is of type "debug_object" */ |
| 508 | |
| 509 | type = ACPI_TYPE_DEBUG_OBJECT; |
| 510 | goto exit; |
| 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | default: |
| 513 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 514 | ACPI_REPORT_ERROR(("acpi_ex_resolve_multiple: Unknown Reference subtype %X\n", obj_desc->reference.opcode)); |
| 515 | return_ACPI_STATUS(AE_AML_INTERNAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | } |
| 517 | } |
| 518 | |
| 519 | /* |
| 520 | * Now we are guaranteed to have an object that has not been created |
| 521 | * via the ref_of or Index operators. |
| 522 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 523 | type = ACPI_GET_OBJECT_TYPE(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 525 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | /* Convert internal types to external types */ |
| 527 | |
| 528 | switch (type) { |
| 529 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 530 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 531 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 532 | |
| 533 | type = ACPI_TYPE_FIELD_UNIT; |
| 534 | break; |
| 535 | |
| 536 | case ACPI_TYPE_LOCAL_SCOPE: |
| 537 | |
| 538 | /* Per ACPI Specification, Scope is untyped */ |
| 539 | |
| 540 | type = ACPI_TYPE_ANY; |
| 541 | break; |
| 542 | |
| 543 | default: |
| 544 | /* No change to Type required */ |
| 545 | break; |
| 546 | } |
| 547 | |
| 548 | *return_type = type; |
| 549 | if (return_desc) { |
| 550 | *return_desc = obj_desc; |
| 551 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 552 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |