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c501d8112c
svn path=/branches/aicom-network-fixes/; revision=34994
277 lines
6.4 KiB
C
277 lines
6.4 KiB
C
/******************************************************************************
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*
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* Module Name: nsinit - namespace initialization
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 R. Byron Moore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_NAMESPACE
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MODULE_NAME ("nsinit")
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/*******************************************************************************
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*
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* FUNCTION: Acpi_ns_initialize_objects
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the entire namespace and perform any necessary
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* 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_ns_initialize_objects (
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void)
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{
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ACPI_STATUS status;
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ACPI_INIT_WALK_INFO info;
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info.field_count = 0;
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info.field_init = 0;
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info.op_region_count = 0;
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info.op_region_init = 0;
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info.object_count = 0;
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/* Walk entire namespace from the supplied root */
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status = acpi_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, acpi_ns_init_one_object,
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&info, NULL);
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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_ns_initialize_devices
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*
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* PARAMETERS: None
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*
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* RETURN: ACPI_STATUS
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*
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* DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
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* This means running _INI on all present devices.
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*
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* Note: We install PCI config space handler on region access,
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* not here.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_ns_initialize_devices (
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void)
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{
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ACPI_STATUS status;
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ACPI_DEVICE_WALK_INFO info;
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info.device_count = 0;
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info.num_STA = 0;
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info.num_INI = 0;
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status = acpi_ns_walk_namespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, FALSE, acpi_ns_init_one_device, &info, NULL);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_ns_init_one_object
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*
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* PARAMETERS: Obj_handle - Node
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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) Op Regions
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_ns_init_one_object (
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ACPI_HANDLE obj_handle,
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u32 level,
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void *context,
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void **return_value)
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{
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OBJECT_TYPE_INTERNAL type;
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ACPI_STATUS status;
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ACPI_INIT_WALK_INFO *info = (ACPI_INIT_WALK_INFO *) context;
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ACPI_NAMESPACE_NODE *node = (ACPI_NAMESPACE_NODE *) obj_handle;
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ACPI_OPERAND_OBJECT *obj_desc;
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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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obj_desc = node->object;
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if (!obj_desc) {
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return (AE_OK);
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}
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switch (type) {
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case ACPI_TYPE_REGION:
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info->op_region_count++;
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if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
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break;
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}
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info->op_region_init++;
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status = acpi_ds_get_region_arguments (obj_desc);
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break;
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case ACPI_TYPE_FIELD_UNIT:
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info->field_count++;
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if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
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break;
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}
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info->field_init++;
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status = acpi_ds_get_field_unit_arguments (obj_desc);
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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_ns_init_one_device
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*
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* PARAMETERS: WALK_CALLBACK
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*
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* RETURN: ACPI_STATUS
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*
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* DESCRIPTION: This is called once per device soon after ACPI is enabled
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* to initialize each device. It determines if the device is
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* present, and if so, calls _INI.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_ns_init_one_device (
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ACPI_HANDLE obj_handle,
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u32 nesting_level,
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void *context,
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void **return_value)
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{
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ACPI_STATUS status;
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ACPI_NAMESPACE_NODE *node;
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u32 flags;
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ACPI_DEVICE_WALK_INFO *info = (ACPI_DEVICE_WALK_INFO *) context;
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info->device_count++;
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acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
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node = acpi_ns_convert_handle_to_entry (obj_handle);
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if (!node) {
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acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
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return (AE_BAD_PARAMETER);
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}
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acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
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/*
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* Run _STA to determine if we can run _INI on the device.
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*/
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status = acpi_cm_execute_STA (node, &flags);
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if (ACPI_FAILURE (status)) {
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/* Ignore error and move on to next device */
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return (AE_OK);
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}
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info->num_STA++;
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if (!(flags & 0x01)) {
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/* don't look at children of a not present device */
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return(AE_CTRL_DEPTH);
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}
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/*
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* The device is present. Run _INI.
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*/
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status = acpi_ns_evaluate_relative (obj_handle, "_INI", NULL, NULL);
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if (AE_NOT_FOUND == status) {
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/* No _INI means device requires no initialization */
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status = AE_OK;
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}
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else if (ACPI_FAILURE (status)) {
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/* Ignore error and move on to next device */
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}
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else {
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/* Count of successful INIs */
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info->num_INI++;
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}
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return (AE_OK);
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}
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