- 根目录:
- drivers
- acpi
- acpica
- excreate.c
/******************************************************************************
*
* 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);
}