--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: excreate - Named object creation
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, Intel Corp.
+ * 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 "accommon.h"
+#include "acinterp.h"
+#include "amlcode.h"
+#include "acnamesp.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) {
+
+ /* For these types, the sub-object can change dynamically via a Store */
+
+ case ACPI_TYPE_INTEGER:
+ case ACPI_TYPE_STRING:
+ case ACPI_TYPE_BUFFER:
+ case ACPI_TYPE_PACKAGE:
+ case ACPI_TYPE_BUFFER_FIELD:
+ /*
+ * These types open a new scope, so we need the NS node in order to access
+ * any children.
+ */
+ case ACPI_TYPE_DEVICE:
+ case ACPI_TYPE_POWER:
+ case ACPI_TYPE_PROCESSOR:
+ case ACPI_TYPE_THERMAL:
+ case ACPI_TYPE_LOCAL_SCOPE:
+ /*
+ * The new alias has the type ALIAS and points to the original
+ * NS node, not the object itself.
+ */
+ alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
+ alias_node->object =
+ ACPI_CAST_PTR(union acpi_operand_object, target_node);
+ break;
+
+ case ACPI_TYPE_METHOD:
+ /*
+ * Control method aliases need to be differentiated
+ */
+ 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.os_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 Mutex */
+
+ status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
+ 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
+ * space_id - Address space ID for the region
+ * 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 space_id, 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 (!acpi_is_valid_space_id(space_id)) {
+ /*
+ * Print an error message, but continue. We don't want to abort
+ * a table load for this exception. Instead, if the region is
+ * actually used at runtime, abort the executing method.
+ */
+ ACPI_ERROR((AE_INFO,
+ "Invalid/unknown Address Space ID: 0x%2.2X",
+ space_id));
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
+ acpi_ut_get_region_name(space_id), space_id));
+
+ /* 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;
+ if (walk_state->scope_info) {
+ region_obj2->extra.scope_node =
+ walk_state->scope_info->scope.node;
+ } else {
+ region_obj2->extra.scope_node = node;
+ }
+
+ /* Init the region from the operands */
+
+ obj_desc->region.space_id = space_id;
+ 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_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.length = (u8) operand[3]->integer.value;
+ obj_desc->processor.address =
+ (acpi_io_address) operand[2]->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) {
+ status = AE_NO_MEMORY;
+ goto exit;
+ }
+
+ /* 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, Serialized
+ * flag, and sync_level for efficiency.
+ */
+ method_flags = (u8) operand[1]->integer.value;
+
+ obj_desc->method.param_count =
+ (u8) (method_flags & AML_METHOD_ARG_COUNT);
+
+ /*
+ * Get the sync_level. If method is serialized, a mutex will be
+ * created for this method when it is parsed.
+ */
+ if (method_flags & AML_METHOD_SERIALIZED) {
+ obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED;
+
+ /*
+ * ACPI 1.0: sync_level = 0
+ * ACPI 2.0: sync_level = sync_level in method declaration
+ */
+ obj_desc->method.sync_level = (u8)
+ ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
+ }
+
+ /* 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);
+
+exit:
+ /* Remove a reference to the operand */
+
+ acpi_ut_remove_reference(operand[1]);
+ return_ACPI_STATUS(status);
+}
Code Review / kvmfornfv.git / blobdiff