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diff --git a/drivers/acpi/executer/excreate.c b/drivers/acpi/executer/excreate.c
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+/******************************************************************************
+ *
+ * Module Name: excreate - Named object creation
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acevents.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT ACPI_EXECUTER
+ ACPI_MODULE_NAME ("excreate")
+
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_alias
+ *
+ * PARAMETERS: walk_state - Current state, contains operands
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new named alias
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_alias (
+ struct acpi_walk_state *walk_state)
+{
+ struct acpi_namespace_node *target_node;
+ struct acpi_namespace_node *alias_node;
+ acpi_status status = AE_OK;
+
+
+ ACPI_FUNCTION_TRACE ("ex_create_alias");
+
+
+ /* Get the source/alias operands (both namespace nodes) */
+
+ alias_node = (struct acpi_namespace_node *) walk_state->operands[0];
+ target_node = (struct acpi_namespace_node *) walk_state->operands[1];
+
+ if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
+ (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
+ /*
+ * Dereference an existing alias so that we don't create a chain
+ * of aliases. With this code, we guarantee that an alias is
+ * always exactly one level of indirection away from the
+ * actual aliased name.
+ */
+ target_node = ACPI_CAST_PTR (struct acpi_namespace_node, target_node->object);
+ }
+
+ /*
+ * For objects that can never change (i.e., the NS node will
+ * permanently point to the same object), we can simply attach
+ * the object to the new NS node. For other objects (such as
+ * Integers, buffers, etc.), we have to point the Alias node
+ * to the original Node.
+ */
+ switch (target_node->type) {
+ case ACPI_TYPE_INTEGER:
+ case ACPI_TYPE_STRING:
+ case ACPI_TYPE_BUFFER:
+ case ACPI_TYPE_PACKAGE:
+ case ACPI_TYPE_BUFFER_FIELD:
+
+ /*
+ * The new alias has the type ALIAS and points to the original
+ * NS node, not the object itself. This is because for these
+ * types, the object can change dynamically via a Store.
+ */
+ alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
+ alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node);
+ break;
+
+ case ACPI_TYPE_METHOD:
+
+ /*
+ * The new alias has the type ALIAS and points to the original
+ * NS node, not the object itself. This is because for these
+ * types, the object can change dynamically via a Store.
+ */
+ alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
+ alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node);
+ break;
+
+ default:
+
+ /* Attach the original source object to the new Alias Node */
+
+ /*
+ * The new alias assumes the type of the target, and it points
+ * to the same object. The reference count of the object has an
+ * additional reference to prevent deletion out from under either the
+ * target node or the alias Node
+ */
+ status = acpi_ns_attach_object (alias_node,
+ acpi_ns_get_attached_object (target_node),
+ target_node->type);
+ break;
+ }
+
+ /* Since both operands are Nodes, we don't need to delete them */
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_event
+ *
+ * PARAMETERS: walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new event object
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_event (
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_operand_object *obj_desc;
+
+
+ ACPI_FUNCTION_TRACE ("ex_create_event");
+
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_EVENT);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /*
+ * Create the actual OS semaphore, with zero initial units -- meaning
+ * that the event is created in an unsignalled state
+ */
+ status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT, 0,
+ &obj_desc->event.semaphore);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ /* Attach object to the Node */
+
+ status = acpi_ns_attach_object ((struct acpi_namespace_node *) walk_state->operands[0],
+ obj_desc, ACPI_TYPE_EVENT);
+
+cleanup:
+ /*
+ * Remove local reference to the object (on error, will cause deletion
+ * of both object and semaphore if present.)
+ */
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_mutex
+ *
+ * PARAMETERS: walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new mutex object
+ *
+ * Mutex (Name[0], sync_level[1])
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_mutex (
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status = AE_OK;
+ union acpi_operand_object *obj_desc;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ex_create_mutex", ACPI_WALK_OPERANDS);
+
+
+ /* Create the new mutex object */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_MUTEX);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /*
+ * Create the actual OS semaphore.
+ * One unit max to make it a mutex, with one initial unit to allow
+ * the mutex to be acquired.
+ */
+ status = acpi_os_create_semaphore (1, 1, &obj_desc->mutex.semaphore);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ /* Init object and attach to NS node */
+
+ obj_desc->mutex.sync_level = (u8) walk_state->operands[1]->integer.value;
+ obj_desc->mutex.node = (struct acpi_namespace_node *) walk_state->operands[0];
+
+ status = acpi_ns_attach_object (obj_desc->mutex.node,
+ obj_desc, ACPI_TYPE_MUTEX);
+
+
+cleanup:
+ /*
+ * Remove local reference to the object (on error, will cause deletion
+ * of both object and semaphore if present.)
+ */
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_region
+ *
+ * PARAMETERS: aml_start - Pointer to the region declaration AML
+ * aml_length - Max length of the declaration AML
+ * Operands - List of operands for the opcode
+ * walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new operation region object
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_region (
+ u8 *aml_start,
+ u32 aml_length,
+ u8 region_space,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_operand_object *obj_desc;
+ struct acpi_namespace_node *node;
+ union acpi_operand_object *region_obj2;
+
+
+ ACPI_FUNCTION_TRACE ("ex_create_region");
+
+
+ /* Get the Namespace Node */
+
+ node = walk_state->op->common.node;
+
+ /*
+ * If the region object is already attached to this node,
+ * just return
+ */
+ if (acpi_ns_get_attached_object (node)) {
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /*
+ * Space ID must be one of the predefined IDs, or in the user-defined
+ * range
+ */
+ if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
+ (region_space < ACPI_USER_REGION_BEGIN)) {
+ ACPI_REPORT_ERROR (("Invalid address_space type %X\n", region_space));
+ return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
+ acpi_ut_get_region_name (region_space), region_space));
+
+ /* Create the region descriptor */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /*
+ * Remember location in AML stream of address & length
+ * operands since they need to be evaluated at run time.
+ */
+ region_obj2 = obj_desc->common.next_object;
+ region_obj2->extra.aml_start = aml_start;
+ region_obj2->extra.aml_length = aml_length;
+
+ /* Init the region from the operands */
+
+ obj_desc->region.space_id = region_space;
+ obj_desc->region.address = 0;
+ obj_desc->region.length = 0;
+ obj_desc->region.node = node;
+
+ /* Install the new region object in the parent Node */
+
+ status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION);
+
+
+cleanup:
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_table_region
+ *
+ * PARAMETERS: walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new data_table_region object
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_table_region (
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status;
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ union acpi_operand_object *obj_desc;
+ struct acpi_namespace_node *node;
+ struct acpi_table_header *table;
+ union acpi_operand_object *region_obj2;
+
+
+ ACPI_FUNCTION_TRACE ("ex_create_table_region");
+
+
+ /* Get the Node from the object stack */
+
+ node = walk_state->op->common.node;
+
+ /*
+ * If the region object is already attached to this node,
+ * just return
+ */
+ if (acpi_ns_get_attached_object (node)) {
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /* Find the ACPI table */
+
+ status = acpi_tb_find_table (operand[1]->string.pointer,
+ operand[2]->string.pointer,
+ operand[3]->string.pointer, &table);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Create the region descriptor */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
+ if (!obj_desc) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ region_obj2 = obj_desc->common.next_object;
+ region_obj2->extra.region_context = NULL;
+
+ /* Init the region from the operands */
+
+ obj_desc->region.space_id = REGION_DATA_TABLE;
+ obj_desc->region.address = (acpi_physical_address) ACPI_TO_INTEGER (table);
+ obj_desc->region.length = table->length;
+ obj_desc->region.node = node;
+ obj_desc->region.flags = AOPOBJ_DATA_VALID;
+
+ /* Install the new region object in the parent Node */
+
+ status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ status = acpi_ev_initialize_region (obj_desc, FALSE);
+ if (ACPI_FAILURE (status)) {
+ if (status == AE_NOT_EXIST) {
+ status = AE_OK;
+ }
+ else {
+ goto cleanup;
+ }
+ }
+
+ obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE;
+
+
+cleanup:
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_processor
+ *
+ * PARAMETERS: walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new processor object and populate the fields
+ *
+ * Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_processor (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ex_create_processor", walk_state);
+
+
+ /* Create the processor object */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PROCESSOR);
+ if (!obj_desc) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /*
+ * Initialize the processor object from the operands
+ */
+ obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
+ obj_desc->processor.address = (acpi_io_address) operand[2]->integer.value;
+ obj_desc->processor.length = (u8) operand[3]->integer.value;
+
+ /* Install the processor object in the parent Node */
+
+ status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
+ obj_desc, ACPI_TYPE_PROCESSOR);
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_power_resource
+ *
+ * PARAMETERS: walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new power_resource object and populate the fields
+ *
+ * power_resource (Name[0], system_level[1], resource_order[2])
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_power_resource (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ acpi_status status;
+ union acpi_operand_object *obj_desc;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ex_create_power_resource", walk_state);
+
+
+ /* Create the power resource object */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_POWER);
+ if (!obj_desc) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /* Initialize the power object from the operands */
+
+ obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
+ obj_desc->power_resource.resource_order = (u16) operand[2]->integer.value;
+
+ /* Install the power resource object in the parent Node */
+
+ status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
+ obj_desc, ACPI_TYPE_POWER);
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ return_ACPI_STATUS (status);
+}
+
+#endif
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ex_create_method
+ *
+ * PARAMETERS: aml_start - First byte of the method's AML
+ * aml_length - AML byte count for this method
+ * walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new method object
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ex_create_method (
+ u8 *aml_start,
+ u32 aml_length,
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+ u8 method_flags;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ex_create_method", walk_state);
+
+
+ /* Create a new method object */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_METHOD);
+ if (!obj_desc) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /* Save the method's AML pointer and length */
+
+ obj_desc->method.aml_start = aml_start;
+ obj_desc->method.aml_length = aml_length;
+
+ /*
+ * Disassemble the method flags. Split off the Arg Count
+ * for efficiency
+ */
+ method_flags = (u8) operand[1]->integer.value;
+
+ obj_desc->method.method_flags = (u8) (method_flags & ~AML_METHOD_ARG_COUNT);
+ obj_desc->method.param_count = (u8) (method_flags & AML_METHOD_ARG_COUNT);
+
+ /*
+ * Get the concurrency count. If required, a semaphore will be
+ * created for this method when it is parsed.
+ */
+ if (acpi_gbl_all_methods_serialized) {
+ obj_desc->method.concurrency = 1;
+ obj_desc->method.method_flags |= AML_METHOD_SERIALIZED;
+ }
+ else if (method_flags & AML_METHOD_SERIALIZED) {
+ /*
+ * ACPI 1.0: Concurrency = 1
+ * ACPI 2.0: Concurrency = (sync_level (in method declaration) + 1)
+ */
+ obj_desc->method.concurrency = (u8)
+ (((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4) + 1);
+ }
+ else {
+ obj_desc->method.concurrency = ACPI_INFINITE_CONCURRENCY;
+ }
+
+ /* Attach the new object to the method Node */
+
+ status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
+ obj_desc, ACPI_TYPE_METHOD);
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+
+ /* Remove a reference to the operand */
+
+ acpi_ut_remove_reference (operand[1]);
+ return_ACPI_STATUS (status);
+}
+
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.