470 lines
13 KiB
C
470 lines
13 KiB
C
// 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 - 2019, 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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