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Diffstat (limited to 'drivers/acpi/dispatcher/dsinit.c')
| -rw-r--r-- | drivers/acpi/dispatcher/dsinit.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/acpi/dispatcher/dsinit.c b/drivers/acpi/dispatcher/dsinit.c new file mode 100644 index 000000000000..b4d264dbbf67 --- /dev/null +++ b/drivers/acpi/dispatcher/dsinit.c @@ -0,0 +1,235 @@ +/****************************************************************************** + * + * Module Name: dsinit - Object initialization namespace walk + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * 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 <acpi/acdispat.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_DISPATCHER + ACPI_MODULE_NAME ("dsinit") + + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_one_object + * + * PARAMETERS: obj_handle - Node + * Level - Current nesting level + * Context - Points to a init info struct + * return_value - Not used + * + * RETURN: Status + * + * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object + * within the namespace. + * + * Currently, the only objects that require initialization are: + * 1) Methods + * 2) Operation Regions + * + ******************************************************************************/ + +acpi_status +acpi_ds_init_one_object ( + acpi_handle obj_handle, + u32 level, + void *context, + void **return_value) +{ + acpi_object_type type; + acpi_status status; + struct acpi_init_walk_info *info = (struct acpi_init_walk_info *) context; + + + ACPI_FUNCTION_NAME ("ds_init_one_object"); + + + /* + * We are only interested in objects owned by the table that + * was just loaded + */ + if (((struct acpi_namespace_node *) obj_handle)->owner_id != + info->table_desc->table_id) { + return (AE_OK); + } + + info->object_count++; + + /* And even then, we are only interested in a few object types */ + + type = acpi_ns_get_type (obj_handle); + + switch (type) { + case ACPI_TYPE_REGION: + + status = acpi_ds_initialize_region (obj_handle); + if (ACPI_FAILURE (status)) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region %p [%4.4s] - Init failure, %s\n", + obj_handle, acpi_ut_get_node_name (obj_handle), + acpi_format_exception (status))); + } + + info->op_region_count++; + break; + + + case ACPI_TYPE_METHOD: + + info->method_count++; + + /* Print a dot for each method unless we are going to print the entire pathname */ + + if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, ".")); + } + + /* + * Set the execution data width (32 or 64) based upon the + * revision number of the parent ACPI table. + * TBD: This is really for possible future support of integer width + * on a per-table basis. Currently, we just use a global for the width. + */ + if (info->table_desc->pointer->revision == 1) { + ((struct acpi_namespace_node *) obj_handle)->flags |= ANOBJ_DATA_WIDTH_32; + } + + /* + * Always parse methods to detect errors, we will delete + * the parse tree below + */ + status = acpi_ds_parse_method (obj_handle); + if (ACPI_FAILURE (status)) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Method %p [%4.4s] - parse failure, %s\n", + obj_handle, acpi_ut_get_node_name (obj_handle), + acpi_format_exception (status))); + + /* This parse failed, but we will continue parsing more methods */ + + break; + } + + /* + * Delete the parse tree. We simply re-parse the method + * for every execution since there isn't much overhead + */ + acpi_ns_delete_namespace_subtree (obj_handle); + acpi_ns_delete_namespace_by_owner (((struct acpi_namespace_node *) obj_handle)->object->method.owning_id); + break; + + + case ACPI_TYPE_DEVICE: + + info->device_count++; + break; + + + default: + break; + } + + /* + * We ignore errors from above, and always return OK, since + * we don't want to abort the walk on a single error. + */ + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ds_initialize_objects + * + * PARAMETERS: table_desc - Descriptor for parent ACPI table + * start_node - Root of subtree to be initialized. + * + * RETURN: Status + * + * DESCRIPTION: Walk the namespace starting at "start_node" and perform any + * necessary initialization on the objects found therein + * + ******************************************************************************/ + +acpi_status +acpi_ds_initialize_objects ( + struct acpi_table_desc *table_desc, + struct acpi_namespace_node *start_node) +{ + acpi_status status; + struct acpi_init_walk_info info; + + + ACPI_FUNCTION_TRACE ("ds_initialize_objects"); + + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "**** Starting initialization of namespace objects ****\n")); + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:")); + + info.method_count = 0; + info.op_region_count = 0; + info.object_count = 0; + info.device_count = 0; + info.table_desc = table_desc; + + /* Walk entire namespace from the supplied root */ + + status = acpi_walk_namespace (ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, + acpi_ds_init_one_object, &info, NULL); + if (ACPI_FAILURE (status)) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed, %s\n", + acpi_format_exception (status))); + } + + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, + "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n", + table_desc->pointer->signature, table_desc->table_id, info.object_count, + info.device_count, info.method_count, info.op_region_count)); + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "%hd Methods, %hd Regions\n", info.method_count, info.op_region_count)); + + return_ACPI_STATUS (AE_OK); +} + + |