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469 lines
13 KiB
469 lines
13 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: excreate - Named object creation |
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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 "acinterp.h" |
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#include "amlcode.h" |
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#include "acnamesp.h" |
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#define _COMPONENT ACPI_EXECUTER |
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ACPI_MODULE_NAME("excreate") |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ex_create_alias |
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* |
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* PARAMETERS: walk_state - Current state, contains operands |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new named alias |
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* |
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******************************************************************************/ |
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acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state) |
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{ |
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struct acpi_namespace_node *target_node; |
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struct acpi_namespace_node *alias_node; |
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acpi_status status = AE_OK; |
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ACPI_FUNCTION_TRACE(ex_create_alias); |
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/* Get the source/alias operands (both namespace nodes) */ |
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alias_node = (struct acpi_namespace_node *)walk_state->operands[0]; |
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target_node = (struct acpi_namespace_node *)walk_state->operands[1]; |
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if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) || |
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(target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) { |
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/* |
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* Dereference an existing alias so that we don't create a chain |
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* of aliases. With this code, we guarantee that an alias is |
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* always exactly one level of indirection away from the |
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* actual aliased name. |
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*/ |
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target_node = |
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ACPI_CAST_PTR(struct acpi_namespace_node, |
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target_node->object); |
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} |
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/* Ensure that the target node is valid */ |
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if (!target_node) { |
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return_ACPI_STATUS(AE_NULL_OBJECT); |
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} |
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/* Construct the alias object (a namespace node) */ |
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switch (target_node->type) { |
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case ACPI_TYPE_METHOD: |
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/* |
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* Control method aliases need to be differentiated with |
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* a special type |
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*/ |
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alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS; |
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break; |
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default: |
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/* |
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* All other object types. |
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* |
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* The new alias has the type ALIAS and points to the original |
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* NS node, not the object itself. |
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*/ |
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alias_node->type = ACPI_TYPE_LOCAL_ALIAS; |
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alias_node->object = |
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ACPI_CAST_PTR(union acpi_operand_object, target_node); |
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break; |
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} |
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/* Since both operands are Nodes, we don't need to delete them */ |
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alias_node->object = |
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ACPI_CAST_PTR(union acpi_operand_object, target_node); |
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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_ex_create_event |
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* |
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* PARAMETERS: walk_state - Current state |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new event object |
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* |
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******************************************************************************/ |
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acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state) |
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{ |
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acpi_status status; |
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union acpi_operand_object *obj_desc; |
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ACPI_FUNCTION_TRACE(ex_create_event); |
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT); |
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if (!obj_desc) { |
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status = AE_NO_MEMORY; |
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goto cleanup; |
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} |
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/* |
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* Create the actual OS semaphore, with zero initial units -- meaning |
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* that the event is created in an unsignalled state |
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*/ |
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status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, |
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&obj_desc->event.os_semaphore); |
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if (ACPI_FAILURE(status)) { |
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goto cleanup; |
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} |
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/* Attach object to the Node */ |
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status = acpi_ns_attach_object((struct acpi_namespace_node *) |
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walk_state->operands[0], obj_desc, |
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ACPI_TYPE_EVENT); |
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cleanup: |
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/* |
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* Remove local reference to the object (on error, will cause deletion |
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* of both object and semaphore if present.) |
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*/ |
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acpi_ut_remove_reference(obj_desc); |
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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_ex_create_mutex |
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* |
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* PARAMETERS: walk_state - Current state |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new mutex object |
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* |
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* Mutex (Name[0], sync_level[1]) |
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* |
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******************************************************************************/ |
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acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state) |
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{ |
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acpi_status status = AE_OK; |
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union acpi_operand_object *obj_desc; |
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ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS); |
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/* Create the new mutex object */ |
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX); |
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if (!obj_desc) { |
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status = AE_NO_MEMORY; |
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goto cleanup; |
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} |
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/* Create the actual OS Mutex */ |
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status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex); |
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if (ACPI_FAILURE(status)) { |
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goto cleanup; |
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} |
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/* Init object and attach to NS node */ |
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obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value; |
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obj_desc->mutex.node = |
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(struct acpi_namespace_node *)walk_state->operands[0]; |
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status = |
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acpi_ns_attach_object(obj_desc->mutex.node, obj_desc, |
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ACPI_TYPE_MUTEX); |
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cleanup: |
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/* |
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* Remove local reference to the object (on error, will cause deletion |
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* of both object and semaphore if present.) |
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*/ |
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acpi_ut_remove_reference(obj_desc); |
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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_ex_create_region |
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* |
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* PARAMETERS: aml_start - Pointer to the region declaration AML |
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* aml_length - Max length of the declaration AML |
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* space_id - Address space ID for the region |
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* walk_state - Current state |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new operation region object |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ex_create_region(u8 * aml_start, |
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u32 aml_length, |
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u8 space_id, struct acpi_walk_state *walk_state) |
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{ |
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acpi_status status; |
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union acpi_operand_object *obj_desc; |
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struct acpi_namespace_node *node; |
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union acpi_operand_object *region_obj2; |
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ACPI_FUNCTION_TRACE(ex_create_region); |
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/* Get the Namespace Node */ |
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node = walk_state->op->common.node; |
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/* |
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* If the region object is already attached to this node, |
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* just return |
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*/ |
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if (acpi_ns_get_attached_object(node)) { |
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return_ACPI_STATUS(AE_OK); |
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} |
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/* |
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* Space ID must be one of the predefined IDs, or in the user-defined |
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* range |
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*/ |
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if (!acpi_is_valid_space_id(space_id)) { |
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/* |
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* Print an error message, but continue. We don't want to abort |
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* a table load for this exception. Instead, if the region is |
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* actually used at runtime, abort the executing method. |
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*/ |
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ACPI_ERROR((AE_INFO, |
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"Invalid/unknown Address Space ID: 0x%2.2X", |
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space_id)); |
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} |
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ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", |
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acpi_ut_get_region_name(space_id), space_id)); |
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/* Create the region descriptor */ |
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION); |
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if (!obj_desc) { |
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status = AE_NO_MEMORY; |
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goto cleanup; |
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} |
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/* |
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* Remember location in AML stream of address & length |
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* operands since they need to be evaluated at run time. |
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*/ |
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region_obj2 = acpi_ns_get_secondary_object(obj_desc); |
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region_obj2->extra.aml_start = aml_start; |
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region_obj2->extra.aml_length = aml_length; |
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region_obj2->extra.method_REG = NULL; |
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if (walk_state->scope_info) { |
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region_obj2->extra.scope_node = |
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walk_state->scope_info->scope.node; |
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} else { |
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region_obj2->extra.scope_node = node; |
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} |
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/* Init the region from the operands */ |
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obj_desc->region.space_id = space_id; |
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obj_desc->region.address = 0; |
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obj_desc->region.length = 0; |
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obj_desc->region.node = node; |
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obj_desc->region.handler = NULL; |
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obj_desc->common.flags &= |
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~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED | |
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AOPOBJ_OBJECT_INITIALIZED); |
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/* Install the new region object in the parent Node */ |
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status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION); |
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cleanup: |
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/* Remove local reference to the object */ |
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acpi_ut_remove_reference(obj_desc); |
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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_ex_create_processor |
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* |
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* PARAMETERS: walk_state - Current state |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new processor object and populate the fields |
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* |
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* Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3]) |
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* |
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******************************************************************************/ |
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acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state) |
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{ |
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union acpi_operand_object **operand = &walk_state->operands[0]; |
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union acpi_operand_object *obj_desc; |
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acpi_status status; |
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ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state); |
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/* Create the processor object */ |
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR); |
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if (!obj_desc) { |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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/* Initialize the processor object from the operands */ |
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obj_desc->processor.proc_id = (u8) operand[1]->integer.value; |
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obj_desc->processor.length = (u8) operand[3]->integer.value; |
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obj_desc->processor.address = |
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(acpi_io_address)operand[2]->integer.value; |
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/* Install the processor object in the parent Node */ |
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status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], |
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obj_desc, ACPI_TYPE_PROCESSOR); |
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/* Remove local reference to the object */ |
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acpi_ut_remove_reference(obj_desc); |
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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_ex_create_power_resource |
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* |
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* PARAMETERS: walk_state - Current state |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new power_resource object and populate the fields |
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* |
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* power_resource (Name[0], system_level[1], resource_order[2]) |
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* |
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******************************************************************************/ |
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acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state) |
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{ |
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union acpi_operand_object **operand = &walk_state->operands[0]; |
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acpi_status status; |
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union acpi_operand_object *obj_desc; |
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ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state); |
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/* Create the power resource object */ |
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER); |
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if (!obj_desc) { |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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/* Initialize the power object from the operands */ |
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obj_desc->power_resource.system_level = (u8) operand[1]->integer.value; |
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obj_desc->power_resource.resource_order = |
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(u16) operand[2]->integer.value; |
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/* Install the power resource object in the parent Node */ |
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status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], |
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obj_desc, ACPI_TYPE_POWER); |
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/* Remove local reference to the object */ |
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acpi_ut_remove_reference(obj_desc); |
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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_ex_create_method |
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* |
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* PARAMETERS: aml_start - First byte of the method's AML |
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* aml_length - AML byte count for this method |
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* walk_state - Current state |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create a new method object |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ex_create_method(u8 * aml_start, |
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u32 aml_length, struct acpi_walk_state *walk_state) |
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{ |
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union acpi_operand_object **operand = &walk_state->operands[0]; |
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union acpi_operand_object *obj_desc; |
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acpi_status status; |
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u8 method_flags; |
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ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state); |
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/* Create a new method object */ |
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); |
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if (!obj_desc) { |
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status = AE_NO_MEMORY; |
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goto exit; |
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} |
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/* Save the method's AML pointer and length */ |
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obj_desc->method.aml_start = aml_start; |
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obj_desc->method.aml_length = aml_length; |
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obj_desc->method.node = operand[0]; |
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/* |
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* Disassemble the method flags. Split off the arg_count, Serialized |
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* flag, and sync_level for efficiency. |
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*/ |
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method_flags = (u8)operand[1]->integer.value; |
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obj_desc->method.param_count = (u8) |
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(method_flags & AML_METHOD_ARG_COUNT); |
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/* |
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* Get the sync_level. If method is serialized, a mutex will be |
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* created for this method when it is parsed. |
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*/ |
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if (method_flags & AML_METHOD_SERIALIZED) { |
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obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED; |
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/* |
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* ACPI 1.0: sync_level = 0 |
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* ACPI 2.0: sync_level = sync_level in method declaration |
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*/ |
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obj_desc->method.sync_level = (u8) |
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((method_flags & AML_METHOD_SYNC_LEVEL) >> 4); |
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} |
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/* Attach the new object to the method Node */ |
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status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], |
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obj_desc, ACPI_TYPE_METHOD); |
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/* Remove local reference to the object */ |
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acpi_ut_remove_reference(obj_desc); |
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exit: |
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/* Remove a reference to the operand */ |
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acpi_ut_remove_reference(operand[1]); |
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return_ACPI_STATUS(status); |
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}
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