/****************************************************************************** * * 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); }