uteval.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:9k
- /******************************************************************************
- *
- * Module Name: uteval - Object evaluation
- * $Revision: 31 $
- *
- *****************************************************************************/
- /*
- * 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 "acinterp.h"
- #define _COMPONENT ACPI_UTILITIES
- MODULE_NAME ("uteval")
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_evaluate_numeric_object
- *
- * PARAMETERS: *Object_name - Object name to be evaluated
- * Device_node - Node for the device
- * *Address - Where the value is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: evaluates a numeric namespace object for a selected device
- * and stores results in *Address.
- *
- * NOTE: Internal function, no parameter validation
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_evaluate_numeric_object (
- NATIVE_CHAR *object_name,
- acpi_namespace_node *device_node,
- acpi_integer *address)
- {
- acpi_operand_object *obj_desc;
- acpi_status status;
- FUNCTION_TRACE ("Ut_evaluate_numeric_object");
- /* Execute the method */
- status = acpi_ns_evaluate_relative (device_node, object_name, NULL, &obj_desc);
- if (ACPI_FAILURE (status)) {
- if (status == AE_NOT_FOUND) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s on %4.4s was not foundn",
- object_name, (char*)&device_node->name));
- }
- else {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s on %4.4s failed with status %sn",
- object_name, (char*)&device_node->name,
- acpi_format_exception (status)));
- }
- return_ACPI_STATUS (status);
- }
- /* Did we get a return object? */
- if (!obj_desc) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from %sn",
- object_name));
- return_ACPI_STATUS (AE_TYPE);
- }
- /* Is the return object of the correct type? */
- if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
- status = AE_TYPE;
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Type returned from %s was not a number: %X n",
- object_name, obj_desc->common.type));
- }
- else {
- /*
- * Since the structure is a union, setting any field will set all
- * of the variables in the union
- */
- *address = obj_desc->integer.value;
- }
- /* On exit, we must delete the return object */
- acpi_ut_remove_reference (obj_desc);
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_execute_HID
- *
- * PARAMETERS: Device_node - Node for the device
- * *Hid - Where the HID is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: Executes the _HID control method that returns the hardware
- * ID of the device.
- *
- * NOTE: Internal function, no parameter validation
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_execute_HID (
- acpi_namespace_node *device_node,
- acpi_device_id *hid)
- {
- acpi_operand_object *obj_desc;
- acpi_status status;
- FUNCTION_TRACE ("Ut_execute_HID");
- /* Execute the method */
- status = acpi_ns_evaluate_relative (device_node,
- METHOD_NAME__HID, NULL, &obj_desc);
- if (ACPI_FAILURE (status)) {
- if (status == AE_NOT_FOUND) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "_HID on %4.4s was not foundn",
- (char*)&device_node->name));
- }
- else {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "_HID on %4.4s failed %sn",
- (char*)&device_node->name, acpi_format_exception (status)));
- }
- return_ACPI_STATUS (status);
- }
- /* Did we get a return object? */
- if (!obj_desc) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from _HIDn"));
- return_ACPI_STATUS (AE_TYPE);
- }
- /*
- * A _HID can return either a Number (32 bit compressed EISA ID) or
- * a string
- */
- if ((obj_desc->common.type != ACPI_TYPE_INTEGER) &&
- (obj_desc->common.type != ACPI_TYPE_STRING)) {
- status = AE_TYPE;
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Type returned from _HID not a number or string: %s(%X) n",
- acpi_ut_get_type_name (obj_desc->common.type), obj_desc->common.type));
- }
- else {
- if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
- /* Convert the Numeric HID to string */
- acpi_ex_eisa_id_to_string ((u32) obj_desc->integer.value, hid->buffer);
- }
- else {
- /* Copy the String HID from the returned object */
- STRNCPY(hid->buffer, obj_desc->string.pointer, sizeof(hid->buffer));
- }
- }
- /* On exit, we must delete the return object */
- acpi_ut_remove_reference (obj_desc);
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_execute_UID
- *
- * PARAMETERS: Device_node - Node for the device
- * *Uid - Where the UID is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: Executes the _UID control method that returns the hardware
- * ID of the device.
- *
- * NOTE: Internal function, no parameter validation
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_execute_UID (
- acpi_namespace_node *device_node,
- acpi_device_id *uid)
- {
- acpi_operand_object *obj_desc;
- acpi_status status;
- PROC_NAME ("Ut_execute_UID");
- /* Execute the method */
- status = acpi_ns_evaluate_relative (device_node,
- METHOD_NAME__UID, NULL, &obj_desc);
- if (ACPI_FAILURE (status)) {
- if (status == AE_NOT_FOUND) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "_UID on %4.4s was not foundn",
- (char*)&device_node->name));
- }
- else {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "_UID on %4.4s failed %sn",
- (char*)&device_node->name, acpi_format_exception (status)));
- }
- return (status);
- }
- /* Did we get a return object? */
- if (!obj_desc) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from _UIDn"));
- return (AE_TYPE);
- }
- /*
- * A _UID can return either a Number (32 bit compressed EISA ID) or
- * a string
- */
- if ((obj_desc->common.type != ACPI_TYPE_INTEGER) &&
- (obj_desc->common.type != ACPI_TYPE_STRING)) {
- status = AE_TYPE;
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Type returned from _UID was not a number or string: %X n",
- obj_desc->common.type));
- }
- else {
- if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
- /* Convert the Numeric UID to string */
- acpi_ex_unsigned_integer_to_string (obj_desc->integer.value, uid->buffer);
- }
- else {
- /* Copy the String UID from the returned object */
- STRNCPY(uid->buffer, obj_desc->string.pointer, sizeof(uid->buffer));
- }
- }
- /* On exit, we must delete the return object */
- acpi_ut_remove_reference (obj_desc);
- return (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_execute_STA
- *
- * PARAMETERS: Device_node - Node for the device
- * *Flags - Where the status flags are returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: Executes _STA for selected device and stores results in
- * *Flags.
- *
- * NOTE: Internal function, no parameter validation
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_execute_STA (
- acpi_namespace_node *device_node,
- u32 *flags)
- {
- acpi_operand_object *obj_desc;
- acpi_status status;
- FUNCTION_TRACE ("Ut_execute_STA");
- /* Execute the method */
- status = acpi_ns_evaluate_relative (device_node,
- METHOD_NAME__STA, NULL, &obj_desc);
- if (AE_NOT_FOUND == status) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "_STA on %4.4s was not found, assuming present.n",
- (char*)&device_node->name));
- *flags = 0x0F;
- status = AE_OK;
- }
- else if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "_STA on %4.4s failed %sn",
- (char*)&device_node->name,
- acpi_format_exception (status)));
- }
- else /* success */ {
- /* Did we get a return object? */
- if (!obj_desc) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from _STAn"));
- return_ACPI_STATUS (AE_TYPE);
- }
- /* Is the return object of the correct type? */
- if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
- status = AE_TYPE;
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Type returned from _STA was not a number: %X n",
- obj_desc->common.type));
- }
- else {
- /* Extract the status flags */
- *flags = (u32) obj_desc->integer.value;
- }
- /* On exit, we must delete the return object */
- acpi_ut_remove_reference (obj_desc);
- }
- return_ACPI_STATUS (status);
- }