// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: nsparse - namespace interface to AML parser * * Copyright (C) 2000 - 2022, Intel Corp. * *****************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #include "acnamesp.h" #include "acparser.h" #include "acdispat.h" #include "actables.h" #include "acinterp.h" #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME("nsparse") /******************************************************************************* * * FUNCTION: ns_execute_table * * PARAMETERS: table_desc - An ACPI table descriptor for table to parse * start_node - Where to enter the table into the namespace * * RETURN: Status * * DESCRIPTION: Load ACPI/AML table by executing the entire table as a single * large control method. * * NOTE: The point of this is to execute any module-level code in-place * as the table is parsed. Some AML code depends on this behavior. * * It is a run-time option at this time, but will eventually become * the default. * * Note: This causes the table to only have a single-pass parse. * However, this is compatible with other ACPI implementations. * ******************************************************************************/ acpi_status acpi_ns_execute_table(u32 table_index, struct acpi_namespace_node *start_node) { acpi_status status; struct acpi_table_header *table; acpi_owner_id owner_id; struct acpi_evaluate_info *info = NULL; u32 aml_length; u8 *aml_start; union acpi_operand_object *method_obj = NULL; ACPI_FUNCTION_TRACE(ns_execute_table); status = acpi_get_table_by_index(table_index, &table); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Table must consist of at least a complete header */ if (table->length < sizeof(struct acpi_table_header)) { return_ACPI_STATUS(AE_BAD_HEADER); } aml_start = (u8 *)table + sizeof(struct acpi_table_header); aml_length = table->length - sizeof(struct acpi_table_header); status = acpi_tb_get_owner_id(table_index, &owner_id); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Create, initialize, and link a new temporary method object */ method_obj = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); if (!method_obj) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Allocate the evaluation information block */ info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); if (!info) { status = AE_NO_MEMORY; goto cleanup; } ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE, "%s: Create table pseudo-method for [%4.4s] @%p, method %p\n", ACPI_GET_FUNCTION_NAME, table->signature, table, method_obj)); method_obj->method.aml_start = aml_start; method_obj->method.aml_length = aml_length; method_obj->method.owner_id = owner_id; method_obj->method.info_flags |= ACPI_METHOD_MODULE_LEVEL; info->pass_number = ACPI_IMODE_EXECUTE; info->node = start_node; info->obj_desc = method_obj; info->node_flags = info->node->flags; info->full_pathname = acpi_ns_get_normalized_pathname(info->node, TRUE); if (!info->full_pathname) { status = AE_NO_MEMORY; goto cleanup; } /* Optional object evaluation log */ ACPI_DEBUG_PRINT_RAW((ACPI_DB_EVALUATION, "%-26s: (Definition Block level)\n", "Module-level evaluation")); status = acpi_ps_execute_table(info); /* Optional object evaluation log */ ACPI_DEBUG_PRINT_RAW((ACPI_DB_EVALUATION, "%-26s: (Definition Block level)\n", "Module-level complete")); cleanup: if (info) { ACPI_FREE(info->full_pathname); info->full_pathname = NULL; } ACPI_FREE(info); acpi_ut_remove_reference(method_obj); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: ns_one_complete_parse * * PARAMETERS: pass_number - 1 or 2 * table_desc - The table to be parsed. * * RETURN: Status * * DESCRIPTION: Perform one complete parse of an ACPI/AML table. * ******************************************************************************/ acpi_status acpi_ns_one_complete_parse(u32 pass_number, u32 table_index, struct acpi_namespace_node *start_node) { union acpi_parse_object *parse_root; acpi_status status; u32 aml_length; u8 *aml_start; struct acpi_walk_state *walk_state; struct acpi_table_header *table; acpi_owner_id owner_id; ACPI_FUNCTION_TRACE(ns_one_complete_parse); status = acpi_get_table_by_index(table_index, &table); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Table must consist of at least a complete header */ if (table->length < sizeof(struct acpi_table_header)) { return_ACPI_STATUS(AE_BAD_HEADER); } aml_start = (u8 *)table + sizeof(struct acpi_table_header); aml_length = table->length - sizeof(struct acpi_table_header); status = acpi_tb_get_owner_id(table_index, &owner_id); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Create and init a Root Node */ parse_root = acpi_ps_create_scope_op(aml_start); if (!parse_root) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Create and initialize a new walk state */ walk_state = acpi_ds_create_walk_state(owner_id, NULL, NULL, NULL); if (!walk_state) { acpi_ps_free_op(parse_root); return_ACPI_STATUS(AE_NO_MEMORY); } status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL, aml_start, aml_length, NULL, (u8)pass_number); if (ACPI_FAILURE(status)) { acpi_ds_delete_walk_state(walk_state); goto cleanup; } /* Found OSDT table, enable the namespace override feature */ if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_OSDT) && pass_number == ACPI_IMODE_LOAD_PASS1) { walk_state->namespace_override = TRUE; } /* start_node is the default location to load the table */ if (start_node && start_node != acpi_gbl_root_node) { status = acpi_ds_scope_stack_push(start_node, ACPI_TYPE_METHOD, walk_state); if (ACPI_FAILURE(status)) { acpi_ds_delete_walk_state(walk_state); goto cleanup; } } /* Parse the AML */ ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "*PARSE* pass %u parse\n", pass_number)); acpi_ex_enter_interpreter(); status = acpi_ps_parse_aml(walk_state); acpi_ex_exit_interpreter(); cleanup: acpi_ps_delete_parse_tree(parse_root); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ns_parse_table * * PARAMETERS: table_desc - An ACPI table descriptor for table to parse * start_node - Where to enter the table into the namespace * * RETURN: Status * * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops * ******************************************************************************/ acpi_status acpi_ns_parse_table(u32 table_index, struct acpi_namespace_node *start_node) { acpi_status status; ACPI_FUNCTION_TRACE(ns_parse_table); /* * Executes the AML table as one large control method. * The point of this is to execute any module-level code in-place * as the table is parsed. Some AML code depends on this behavior. * * Note: This causes the table to only have a single-pass parse. * However, this is compatible with other ACPI implementations. */ ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE, "%s: **** Start table execution pass\n", ACPI_GET_FUNCTION_NAME)); status = acpi_ns_execute_table(table_index, start_node); return_ACPI_STATUS(status); }