| /****************************************************************************** |
| * |
| * Module Name: excreate - Named object creation |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2012, 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); |
| } |