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271 lines
7.5 KiB
271 lines
7.5 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: nsparse - namespace interface to AML parser |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acnamesp.h" |
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#include "acparser.h" |
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#include "acdispat.h" |
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#include "actables.h" |
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#include "acinterp.h" |
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#define _COMPONENT ACPI_NAMESPACE |
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ACPI_MODULE_NAME("nsparse") |
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/******************************************************************************* |
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* |
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* FUNCTION: ns_execute_table |
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* |
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* PARAMETERS: table_desc - An ACPI table descriptor for table to parse |
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* start_node - Where to enter the table into the namespace |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Load ACPI/AML table by executing the entire table as a single |
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* large control method. |
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* |
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* NOTE: The point of this is to execute any module-level code in-place |
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* as the table is parsed. Some AML code depends on this behavior. |
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* |
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* It is a run-time option at this time, but will eventually become |
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* the default. |
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* |
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* Note: This causes the table to only have a single-pass parse. |
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* However, this is compatible with other ACPI implementations. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ns_execute_table(u32 table_index, struct acpi_namespace_node *start_node) |
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{ |
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acpi_status status; |
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struct acpi_table_header *table; |
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acpi_owner_id owner_id; |
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struct acpi_evaluate_info *info = NULL; |
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u32 aml_length; |
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u8 *aml_start; |
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union acpi_operand_object *method_obj = NULL; |
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ACPI_FUNCTION_TRACE(ns_execute_table); |
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status = acpi_get_table_by_index(table_index, &table); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* Table must consist of at least a complete header */ |
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if (table->length < sizeof(struct acpi_table_header)) { |
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return_ACPI_STATUS(AE_BAD_HEADER); |
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} |
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aml_start = (u8 *)table + sizeof(struct acpi_table_header); |
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aml_length = table->length - sizeof(struct acpi_table_header); |
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status = acpi_tb_get_owner_id(table_index, &owner_id); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* Create, initialize, and link a new temporary method object */ |
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method_obj = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); |
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if (!method_obj) { |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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/* Allocate the evaluation information block */ |
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info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
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if (!info) { |
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status = AE_NO_MEMORY; |
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goto cleanup; |
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} |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE, |
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"%s: Create table pseudo-method for [%4.4s] @%p, method %p\n", |
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ACPI_GET_FUNCTION_NAME, table->signature, table, |
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method_obj)); |
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method_obj->method.aml_start = aml_start; |
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method_obj->method.aml_length = aml_length; |
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method_obj->method.owner_id = owner_id; |
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method_obj->method.info_flags |= ACPI_METHOD_MODULE_LEVEL; |
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info->pass_number = ACPI_IMODE_EXECUTE; |
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info->node = start_node; |
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info->obj_desc = method_obj; |
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info->node_flags = info->node->flags; |
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info->full_pathname = acpi_ns_get_normalized_pathname(info->node, TRUE); |
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if (!info->full_pathname) { |
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status = AE_NO_MEMORY; |
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goto cleanup; |
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} |
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/* Optional object evaluation log */ |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EVALUATION, |
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"%-26s: (Definition Block level)\n", |
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"Module-level evaluation")); |
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status = acpi_ps_execute_table(info); |
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/* Optional object evaluation log */ |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EVALUATION, |
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"%-26s: (Definition Block level)\n", |
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"Module-level complete")); |
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cleanup: |
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if (info) { |
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ACPI_FREE(info->full_pathname); |
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info->full_pathname = NULL; |
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} |
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ACPI_FREE(info); |
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acpi_ut_remove_reference(method_obj); |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: ns_one_complete_parse |
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* |
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* PARAMETERS: pass_number - 1 or 2 |
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* table_desc - The table to be parsed. |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Perform one complete parse of an ACPI/AML table. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ns_one_complete_parse(u32 pass_number, |
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u32 table_index, |
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struct acpi_namespace_node *start_node) |
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{ |
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union acpi_parse_object *parse_root; |
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acpi_status status; |
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u32 aml_length; |
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u8 *aml_start; |
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struct acpi_walk_state *walk_state; |
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struct acpi_table_header *table; |
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acpi_owner_id owner_id; |
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ACPI_FUNCTION_TRACE(ns_one_complete_parse); |
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status = acpi_get_table_by_index(table_index, &table); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* Table must consist of at least a complete header */ |
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if (table->length < sizeof(struct acpi_table_header)) { |
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return_ACPI_STATUS(AE_BAD_HEADER); |
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} |
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aml_start = (u8 *)table + sizeof(struct acpi_table_header); |
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aml_length = table->length - sizeof(struct acpi_table_header); |
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status = acpi_tb_get_owner_id(table_index, &owner_id); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* Create and init a Root Node */ |
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parse_root = acpi_ps_create_scope_op(aml_start); |
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if (!parse_root) { |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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/* Create and initialize a new walk state */ |
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walk_state = acpi_ds_create_walk_state(owner_id, NULL, NULL, NULL); |
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if (!walk_state) { |
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acpi_ps_free_op(parse_root); |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL, |
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aml_start, aml_length, NULL, |
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(u8)pass_number); |
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if (ACPI_FAILURE(status)) { |
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acpi_ds_delete_walk_state(walk_state); |
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goto cleanup; |
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} |
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/* Found OSDT table, enable the namespace override feature */ |
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if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_OSDT) && |
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pass_number == ACPI_IMODE_LOAD_PASS1) { |
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walk_state->namespace_override = TRUE; |
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} |
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/* start_node is the default location to load the table */ |
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if (start_node && start_node != acpi_gbl_root_node) { |
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status = |
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acpi_ds_scope_stack_push(start_node, ACPI_TYPE_METHOD, |
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walk_state); |
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if (ACPI_FAILURE(status)) { |
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acpi_ds_delete_walk_state(walk_state); |
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goto cleanup; |
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} |
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} |
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/* Parse the AML */ |
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
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"*PARSE* pass %u parse\n", pass_number)); |
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acpi_ex_enter_interpreter(); |
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status = acpi_ps_parse_aml(walk_state); |
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acpi_ex_exit_interpreter(); |
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cleanup: |
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acpi_ps_delete_parse_tree(parse_root); |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ns_parse_table |
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* |
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* PARAMETERS: table_desc - An ACPI table descriptor for table to parse |
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* start_node - Where to enter the table into the namespace |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Parse AML within an ACPI table and return a tree of ops |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ns_parse_table(u32 table_index, struct acpi_namespace_node *start_node) |
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{ |
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acpi_status status; |
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ACPI_FUNCTION_TRACE(ns_parse_table); |
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/* |
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* Executes the AML table as one large control method. |
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* The point of this is to execute any module-level code in-place |
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* as the table is parsed. Some AML code depends on this behavior. |
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* |
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* Note: This causes the table to only have a single-pass parse. |
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* However, this is compatible with other ACPI implementations. |
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*/ |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE, |
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"%s: **** Start table execution pass\n", |
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ACPI_GET_FUNCTION_NAME)); |
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status = acpi_ns_execute_table(table_index, start_node); |
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return_ACPI_STATUS(status); |
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}
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