218 строки
6.6 KiB
C
218 строки
6.6 KiB
C
/******************************************************************************
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*
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* Module Name: dsinit - Object initialization namespace walk
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acdispat.h"
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#include "acnamesp.h"
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#include "actables.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dsinit")
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/* Local prototypes */
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static acpi_status
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acpi_ds_init_one_object(acpi_handle obj_handle,
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u32 level, void *context, void **return_value);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_init_one_object
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*
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* PARAMETERS: obj_handle - Node for the object
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* level - Current nesting level
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* context - Points to a init info struct
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* return_value - Not used
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*
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* RETURN: Status
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*
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* DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
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* within the namespace.
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*
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* Currently, the only objects that require initialization are:
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* 1) Methods
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* 2) Operation Regions
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*
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******************************************************************************/
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static acpi_status
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acpi_ds_init_one_object(acpi_handle obj_handle,
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u32 level, void *context, void **return_value)
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{
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struct acpi_init_walk_info *info =
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(struct acpi_init_walk_info *)context;
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struct acpi_namespace_node *node =
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(struct acpi_namespace_node *)obj_handle;
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acpi_object_type type;
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acpi_status status;
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ACPI_FUNCTION_ENTRY();
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/*
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* We are only interested in NS nodes owned by the table that
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* was just loaded
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*/
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if (node->owner_id != info->owner_id) {
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return (AE_OK);
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}
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info->object_count++;
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/* And even then, we are only interested in a few object types */
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type = acpi_ns_get_type(obj_handle);
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switch (type) {
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case ACPI_TYPE_REGION:
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status = acpi_ds_initialize_region(obj_handle);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During Region initialization %p [%4.4s]",
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obj_handle,
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acpi_ut_get_node_name(obj_handle)));
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}
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info->op_region_count++;
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break;
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case ACPI_TYPE_METHOD:
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info->method_count++;
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break;
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case ACPI_TYPE_DEVICE:
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info->device_count++;
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break;
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default:
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break;
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}
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/*
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* We ignore errors from above, and always return OK, since
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* we don't want to abort the walk on a single error.
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*/
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_initialize_objects
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*
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* PARAMETERS: table_desc - Descriptor for parent ACPI table
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* start_node - Root of subtree to be initialized.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
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* necessary initialization on the objects found therein
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*
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******************************************************************************/
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acpi_status
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acpi_ds_initialize_objects(u32 table_index,
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struct acpi_namespace_node * start_node)
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{
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acpi_status status;
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struct acpi_init_walk_info info;
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struct acpi_table_header *table;
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acpi_owner_id owner_id;
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ACPI_FUNCTION_TRACE(ds_initialize_objects);
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status = acpi_tb_get_owner_id(table_index, &owner_id);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"**** Starting initialization of namespace objects ****\n"));
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
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/* Set all init info to zero */
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ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
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info.owner_id = owner_id;
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info.table_index = table_index;
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/* Walk entire namespace from the supplied root */
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* We don't use acpi_walk_namespace since we do not want to acquire
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* the namespace reader lock.
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*/
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status =
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acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
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ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object,
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NULL, &info, NULL);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
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}
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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status = acpi_get_table_by_index(table_index, &table);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
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table->signature, owner_id, info.object_count,
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info.device_count, info.method_count,
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info.op_region_count));
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"%u Methods, %u Regions\n", info.method_count,
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info.op_region_count));
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return_ACPI_STATUS(AE_OK);
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}
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