1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /****************************************************************************** 3 * 4 * Module Name: dsargs - Support for execution of dynamic arguments for static 5 * objects (regions, fields, buffer fields, etc.) 6 * 7 * Copyright (C) 2000 - 2021, Intel Corp. 8 * 9 *****************************************************************************/ 10 11 #include <acpi/acpi.h> 12 #include "accommon.h" 13 #include "acparser.h" 14 #include "amlcode.h" 15 #include "acdispat.h" 16 #include "acnamesp.h" 17 18 #define _COMPONENT ACPI_DISPATCHER 19 ACPI_MODULE_NAME("dsargs") 20 21 /* Local prototypes */ 22 static acpi_status 23 acpi_ds_execute_arguments(struct acpi_namespace_node *node, 24 struct acpi_namespace_node *scope_node, 25 u32 aml_length, u8 *aml_start); 26 27 /******************************************************************************* 28 * 29 * FUNCTION: acpi_ds_execute_arguments 30 * 31 * PARAMETERS: node - Object NS node 32 * scope_node - Parent NS node 33 * aml_length - Length of executable AML 34 * aml_start - Pointer to the AML 35 * 36 * RETURN: Status. 37 * 38 * DESCRIPTION: Late (deferred) execution of region or field arguments 39 * 40 ******************************************************************************/ 41 42 static acpi_status 43 acpi_ds_execute_arguments(struct acpi_namespace_node *node, 44 struct acpi_namespace_node *scope_node, 45 u32 aml_length, u8 *aml_start) 46 { 47 acpi_status status; 48 union acpi_parse_object *op; 49 struct acpi_walk_state *walk_state; 50 51 ACPI_FUNCTION_TRACE_PTR(ds_execute_arguments, aml_start); 52 53 /* Allocate a new parser op to be the root of the parsed tree */ 54 55 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP, aml_start); 56 if (!op) { 57 return_ACPI_STATUS(AE_NO_MEMORY); 58 } 59 60 /* Save the Node for use in acpi_ps_parse_aml */ 61 62 op->common.node = scope_node; 63 64 /* Create and initialize a new parser state */ 65 66 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); 67 if (!walk_state) { 68 status = AE_NO_MEMORY; 69 goto cleanup; 70 } 71 72 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, 73 aml_length, NULL, ACPI_IMODE_LOAD_PASS1); 74 if (ACPI_FAILURE(status)) { 75 acpi_ds_delete_walk_state(walk_state); 76 goto cleanup; 77 } 78 79 /* Mark this parse as a deferred opcode */ 80 81 walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP; 82 walk_state->deferred_node = node; 83 84 /* Pass1: Parse the entire declaration */ 85 86 status = acpi_ps_parse_aml(walk_state); 87 if (ACPI_FAILURE(status)) { 88 goto cleanup; 89 } 90 91 /* Get and init the Op created above */ 92 93 op->common.node = node; 94 acpi_ps_delete_parse_tree(op); 95 96 /* Evaluate the deferred arguments */ 97 98 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP, aml_start); 99 if (!op) { 100 return_ACPI_STATUS(AE_NO_MEMORY); 101 } 102 103 op->common.node = scope_node; 104 105 /* Create and initialize a new parser state */ 106 107 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); 108 if (!walk_state) { 109 status = AE_NO_MEMORY; 110 goto cleanup; 111 } 112 113 /* Execute the opcode and arguments */ 114 115 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, 116 aml_length, NULL, ACPI_IMODE_EXECUTE); 117 if (ACPI_FAILURE(status)) { 118 acpi_ds_delete_walk_state(walk_state); 119 goto cleanup; 120 } 121 122 /* Mark this execution as a deferred opcode */ 123 124 walk_state->deferred_node = node; 125 status = acpi_ps_parse_aml(walk_state); 126 127 cleanup: 128 acpi_ps_delete_parse_tree(op); 129 return_ACPI_STATUS(status); 130 } 131 132 /******************************************************************************* 133 * 134 * FUNCTION: acpi_ds_get_buffer_field_arguments 135 * 136 * PARAMETERS: obj_desc - A valid buffer_field object 137 * 138 * RETURN: Status. 139 * 140 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late 141 * evaluation of these field attributes. 142 * 143 ******************************************************************************/ 144 145 acpi_status 146 acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc) 147 { 148 union acpi_operand_object *extra_desc; 149 struct acpi_namespace_node *node; 150 acpi_status status; 151 152 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc); 153 154 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { 155 return_ACPI_STATUS(AE_OK); 156 } 157 158 /* Get the AML pointer (method object) and buffer_field node */ 159 160 extra_desc = acpi_ns_get_secondary_object(obj_desc); 161 node = obj_desc->buffer_field.node; 162 163 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname 164 (ACPI_TYPE_BUFFER_FIELD, node, NULL)); 165 166 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n", 167 acpi_ut_get_node_name(node))); 168 169 /* Execute the AML code for the term_arg arguments */ 170 171 status = acpi_ds_execute_arguments(node, node->parent, 172 extra_desc->extra.aml_length, 173 extra_desc->extra.aml_start); 174 return_ACPI_STATUS(status); 175 } 176 177 /******************************************************************************* 178 * 179 * FUNCTION: acpi_ds_get_bank_field_arguments 180 * 181 * PARAMETERS: obj_desc - A valid bank_field object 182 * 183 * RETURN: Status. 184 * 185 * DESCRIPTION: Get bank_field bank_value. This implements the late 186 * evaluation of these field attributes. 187 * 188 ******************************************************************************/ 189 190 acpi_status 191 acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc) 192 { 193 union acpi_operand_object *extra_desc; 194 struct acpi_namespace_node *node; 195 acpi_status status; 196 197 ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc); 198 199 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { 200 return_ACPI_STATUS(AE_OK); 201 } 202 203 /* Get the AML pointer (method object) and bank_field node */ 204 205 extra_desc = acpi_ns_get_secondary_object(obj_desc); 206 node = obj_desc->bank_field.node; 207 208 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname 209 (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL)); 210 211 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n", 212 acpi_ut_get_node_name(node))); 213 214 /* Execute the AML code for the term_arg arguments */ 215 216 status = acpi_ds_execute_arguments(node, node->parent, 217 extra_desc->extra.aml_length, 218 extra_desc->extra.aml_start); 219 if (ACPI_FAILURE(status)) { 220 return_ACPI_STATUS(status); 221 } 222 223 status = acpi_ut_add_address_range(obj_desc->region.space_id, 224 obj_desc->region.address, 225 obj_desc->region.length, node); 226 return_ACPI_STATUS(status); 227 } 228 229 /******************************************************************************* 230 * 231 * FUNCTION: acpi_ds_get_buffer_arguments 232 * 233 * PARAMETERS: obj_desc - A valid Buffer object 234 * 235 * RETURN: Status. 236 * 237 * DESCRIPTION: Get Buffer length and initializer byte list. This implements 238 * the late evaluation of these attributes. 239 * 240 ******************************************************************************/ 241 242 acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc) 243 { 244 struct acpi_namespace_node *node; 245 acpi_status status; 246 247 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc); 248 249 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { 250 return_ACPI_STATUS(AE_OK); 251 } 252 253 /* Get the Buffer node */ 254 255 node = obj_desc->buffer.node; 256 if (!node) { 257 ACPI_ERROR((AE_INFO, 258 "No pointer back to namespace node in buffer object %p", 259 obj_desc)); 260 return_ACPI_STATUS(AE_AML_INTERNAL); 261 } 262 263 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n")); 264 265 /* Execute the AML code for the term_arg arguments */ 266 267 status = acpi_ds_execute_arguments(node, node, 268 obj_desc->buffer.aml_length, 269 obj_desc->buffer.aml_start); 270 return_ACPI_STATUS(status); 271 } 272 273 /******************************************************************************* 274 * 275 * FUNCTION: acpi_ds_get_package_arguments 276 * 277 * PARAMETERS: obj_desc - A valid Package object 278 * 279 * RETURN: Status. 280 * 281 * DESCRIPTION: Get Package length and initializer byte list. This implements 282 * the late evaluation of these attributes. 283 * 284 ******************************************************************************/ 285 286 acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc) 287 { 288 struct acpi_namespace_node *node; 289 acpi_status status; 290 291 ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc); 292 293 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { 294 return_ACPI_STATUS(AE_OK); 295 } 296 297 /* Get the Package node */ 298 299 node = obj_desc->package.node; 300 if (!node) { 301 ACPI_ERROR((AE_INFO, 302 "No pointer back to namespace node in package %p", 303 obj_desc)); 304 return_ACPI_STATUS(AE_AML_INTERNAL); 305 } 306 307 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Argument Init, AML Ptr: %p\n", 308 obj_desc->package.aml_start)); 309 310 /* Execute the AML code for the term_arg arguments */ 311 312 status = acpi_ds_execute_arguments(node, node, 313 obj_desc->package.aml_length, 314 obj_desc->package.aml_start); 315 316 return_ACPI_STATUS(status); 317 } 318 319 /******************************************************************************* 320 * 321 * FUNCTION: acpi_ds_get_region_arguments 322 * 323 * PARAMETERS: obj_desc - A valid region object 324 * 325 * RETURN: Status. 326 * 327 * DESCRIPTION: Get region address and length. This implements the late 328 * evaluation of these region attributes. 329 * 330 ******************************************************************************/ 331 332 acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc) 333 { 334 struct acpi_namespace_node *node; 335 acpi_status status; 336 union acpi_operand_object *extra_desc; 337 338 ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc); 339 340 if (obj_desc->region.flags & AOPOBJ_DATA_VALID) { 341 return_ACPI_STATUS(AE_OK); 342 } 343 344 extra_desc = acpi_ns_get_secondary_object(obj_desc); 345 if (!extra_desc) { 346 return_ACPI_STATUS(AE_NOT_EXIST); 347 } 348 349 /* Get the Region node */ 350 351 node = obj_desc->region.node; 352 353 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname 354 (ACPI_TYPE_REGION, node, NULL)); 355 356 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 357 "[%4.4s] OpRegion Arg Init at AML %p\n", 358 acpi_ut_get_node_name(node), 359 extra_desc->extra.aml_start)); 360 361 /* Execute the argument AML */ 362 363 status = acpi_ds_execute_arguments(node, extra_desc->extra.scope_node, 364 extra_desc->extra.aml_length, 365 extra_desc->extra.aml_start); 366 if (ACPI_FAILURE(status)) { 367 return_ACPI_STATUS(status); 368 } 369 370 status = acpi_ut_add_address_range(obj_desc->region.space_id, 371 obj_desc->region.address, 372 obj_desc->region.length, node); 373 return_ACPI_STATUS(status); 374 } 375