nsinit.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:9k
- /******************************************************************************
- *
- * Module Name: nsinit - namespace initialization
- * $Revision: 33 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 R. Byron Moore
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include "acpi.h"
- #include "acnamesp.h"
- #include "acdispat.h"
- #include "acinterp.h"
- #define _COMPONENT ACPI_NAMESPACE
- MODULE_NAME ("nsinit")
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ns_initialize_objects
- *
- * PARAMETERS: None
- *
- * RETURN: Status
- *
- * DESCRIPTION: Walk the entire namespace and perform any necessary
- * initialization on the objects found therein
- *
- ******************************************************************************/
- acpi_status
- acpi_ns_initialize_objects (
- void)
- {
- acpi_status status;
- acpi_init_walk_info info;
- FUNCTION_TRACE ("Ns_initialize_objects");
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "**** Starting initialization of namespace objects ****n"));
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "Completing Region and Field initialization:"));
- info.field_count = 0;
- info.field_init = 0;
- info.op_region_count = 0;
- info.op_region_init = 0;
- info.object_count = 0;
- /* Walk entire namespace from the supplied root */
- status = acpi_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, acpi_ns_init_one_object,
- &info, NULL);
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Walk_namespace failed! %xn", status));
- }
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK,
- "n%d/%d Regions, %d/%d Fields initialized (%d nodes total)n",
- info.op_region_init, info.op_region_count, info.field_init,
- info.field_count, info.object_count));
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "%d Control Methods foundn", info.method_count));
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "%d Op Regions foundn", info.op_region_count));
- return_ACPI_STATUS (AE_OK);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ns_initialize_devices
- *
- * PARAMETERS: None
- *
- * RETURN: acpi_status
- *
- * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
- * This means running _INI on all present devices.
- *
- * Note: We install PCI config space handler on region access,
- * not here.
- *
- ******************************************************************************/
- acpi_status
- acpi_ns_initialize_devices (
- void)
- {
- acpi_status status;
- acpi_device_walk_info info;
- FUNCTION_TRACE ("Ns_initialize_devices");
- info.device_count = 0;
- info.num_STA = 0;
- info.num_INI = 0;
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "Executing device _INI methods:"));
- status = acpi_ns_walk_namespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, FALSE, acpi_ns_init_one_device, &info, NULL);
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Walk_namespace failed! %xn", status));
- }
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK,
- "n%d Devices found: %d _STA, %d _INIn",
- info.device_count, info.num_STA, info.num_INI));
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ns_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) Op Regions
- *
- ******************************************************************************/
- acpi_status
- acpi_ns_init_one_object (
- acpi_handle obj_handle,
- u32 level,
- void *context,
- void **return_value)
- {
- acpi_object_type8 type;
- acpi_status status;
- acpi_init_walk_info *info = (acpi_init_walk_info *) context;
- acpi_namespace_node *node = (acpi_namespace_node *) obj_handle;
- acpi_operand_object *obj_desc;
- PROC_NAME ("Ns_init_one_object");
- info->object_count++;
- /* And even then, we are only interested in a few object types */
- type = acpi_ns_get_type (obj_handle);
- obj_desc = node->object;
- if (!obj_desc) {
- return (AE_OK);
- }
- if ((type != ACPI_TYPE_REGION) &&
- (type != ACPI_TYPE_BUFFER_FIELD)) {
- return (AE_OK);
- }
- /*
- * Must lock the interpreter before executing AML code
- */
- status = acpi_ex_enter_interpreter ();
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- switch (type) {
- case ACPI_TYPE_REGION:
- info->op_region_count++;
- if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
- break;
- }
- info->op_region_init++;
- status = acpi_ds_get_region_arguments (obj_desc);
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, "n"));
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "%s while getting region arguments [%4.4s]n",
- acpi_format_exception (status), (char*)&node->name));
- }
- if (!(acpi_dbg_level & ACPI_LV_INIT)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "."));
- }
- break;
- case ACPI_TYPE_BUFFER_FIELD:
- info->field_count++;
- if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
- break;
- }
- info->field_init++;
- status = acpi_ds_get_buffer_field_arguments (obj_desc);
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, "n"));
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "%s while getting buffer field arguments [%4.4s]n",
- acpi_format_exception (status), (char*)&node->name));
- }
- if (!(acpi_dbg_level & ACPI_LV_INIT)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "."));
- }
- 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.
- */
- acpi_ex_exit_interpreter ();
- return (AE_OK);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ns_init_one_device
- *
- * PARAMETERS: acpi_walk_callback
- *
- * RETURN: acpi_status
- *
- * DESCRIPTION: This is called once per device soon after ACPI is enabled
- * to initialize each device. It determines if the device is
- * present, and if so, calls _INI.
- *
- ******************************************************************************/
- acpi_status
- acpi_ns_init_one_device (
- acpi_handle obj_handle,
- u32 nesting_level,
- void *context,
- void **return_value)
- {
- acpi_status status;
- acpi_namespace_node *node;
- u32 flags;
- acpi_device_walk_info *info = (acpi_device_walk_info *) context;
- FUNCTION_TRACE ("Ns_init_one_device");
- if (!(acpi_dbg_level & ACPI_LV_INIT)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "."));
- }
- info->device_count++;
- acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
- node = acpi_ns_map_handle_to_node (obj_handle);
- if (!node) {
- acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
- return (AE_BAD_PARAMETER);
- }
- acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
- /*
- * Run _STA to determine if we can run _INI on the device.
- */
- DEBUG_EXEC (acpi_ut_display_init_pathname (node, "_STA [Method]"));
- status = acpi_ut_execute_STA (node, &flags);
- if (ACPI_FAILURE (status)) {
- /* Ignore error and move on to next device */
- return_ACPI_STATUS (AE_OK);
- }
- info->num_STA++;
- if (!(flags & 0x01)) {
- /* don't look at children of a not present device */
- return_ACPI_STATUS(AE_CTRL_DEPTH);
- }
- /*
- * The device is present. Run _INI.
- */
- DEBUG_EXEC (acpi_ut_display_init_pathname (obj_handle, "_INI [Method]"));
- status = acpi_ns_evaluate_relative (obj_handle, "_INI", NULL, NULL);
- if (AE_NOT_FOUND == status) {
- /* No _INI means device requires no initialization */
- status = AE_OK;
- }
- else if (ACPI_FAILURE (status)) {
- /* Ignore error and move on to next device */
- #ifdef ACPI_DEBUG
- NATIVE_CHAR *scope_name = acpi_ns_get_table_pathname (obj_handle);
- ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "%s._INI failed: %sn",
- scope_name, acpi_format_exception (status)));
- ACPI_MEM_FREE (scope_name);
- #endif
- }
- else {
- /* Count of successful INIs */
- info->num_INI++;
- }
- return_ACPI_STATUS (AE_OK);
- }