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|
/******************************************************************************
*
* Module Name: nsinit - namespace initialization
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* 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 "accommon.h"
#include "acnamesp.h"
#include "acdispat.h"
#include "acinterp.h"
#include <linux/nmi.h>
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nsinit")
/* Local prototypes */
static acpi_status
acpi_ns_init_one_object(acpi_handle obj_handle,
u32 level, void *context, void **return_value);
static acpi_status
acpi_ns_init_one_device(acpi_handle obj_handle,
u32 nesting_level, void *context, void **return_value);
static acpi_status
acpi_ns_find_ini_methods(acpi_handle obj_handle,
u32 nesting_level, void *context, void **return_value);
/*******************************************************************************
*
* 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;
struct acpi_init_walk_info info;
ACPI_FUNCTION_TRACE(ns_initialize_objects);
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"**** Starting initialization of namespace objects ****\n"));
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"Completing Region/Field/Buffer/Package initialization:"));
/* Set all init info to zero */
ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
/* 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, NULL,
&info, NULL);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
}
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"\nInitialized %u/%u Regions %u/%u Fields %u/%u "
"Buffers %u/%u Packages (%u nodes)\n",
info.op_region_init, info.op_region_count,
info.field_init, info.field_count,
info.buffer_init, info.buffer_count,
info.package_init, info.package_count,
info.object_count));
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"%u Control Methods found\n", info.method_count));
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"%u Op Regions found\n", 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;
struct acpi_device_walk_info info;
ACPI_FUNCTION_TRACE(ns_initialize_devices);
/* Init counters */
info.device_count = 0;
info.num_STA = 0;
info.num_INI = 0;
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"Initializing Device/Processor/Thermal objects "
"by executing _INI methods:"));
/* Tree analysis: find all subtrees that contain _INI methods */
status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE,
acpi_ns_find_ini_methods, NULL, &info,
NULL);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
/* Allocate the evaluation information block */
info.evaluate_info =
ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
if (!info.evaluate_info) {
status = AE_NO_MEMORY;
goto error_exit;
}
/*
* Execute the "global" _INI method that may appear at the root. This
* support is provided for Windows compatibility (Vista+) and is not
* part of the ACPI specification.
*/
info.evaluate_info->prefix_node = acpi_gbl_root_node;
info.evaluate_info->pathname = METHOD_NAME__INI;
info.evaluate_info->parameters = NULL;
info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
status = acpi_ns_evaluate(info.evaluate_info);
if (ACPI_SUCCESS(status)) {
info.num_INI++;
}
/* Walk namespace to execute all _INIs on present devices */
status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE,
acpi_ns_init_one_device, NULL, &info,
NULL);
/*
* Any _OSI requests should be completed by now. If the BIOS has
* requested any Windows OSI strings, we will always truncate
* I/O addresses to 16 bits -- for Windows compatibility.
*/
if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
acpi_gbl_truncate_io_addresses = TRUE;
}
ACPI_FREE(info.evaluate_info);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"\nExecuted %u _INI methods requiring %u _STA executions "
"(examined %u objects)\n",
info.num_INI, info.num_STA, info.device_count));
return_ACPI_STATUS(status);
error_exit:
ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
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
*
******************************************************************************/
static acpi_status
acpi_ns_init_one_object(acpi_handle obj_handle,
u32 level, void *context, void **return_value)
{
acpi_object_type type;
acpi_status status = AE_OK;
struct acpi_init_walk_info *info =
(struct acpi_init_walk_info *)context;
struct acpi_namespace_node *node =
(struct acpi_namespace_node *)obj_handle;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_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 = acpi_ns_get_attached_object(node);
if (!obj_desc) {
return (AE_OK);
}
/* Increment counters for object types we are looking for */
switch (type) {
case ACPI_TYPE_REGION:
info->op_region_count++;
break;
case ACPI_TYPE_BUFFER_FIELD:
info->field_count++;
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
info->field_count++;
break;
case ACPI_TYPE_BUFFER:
info->buffer_count++;
break;
case ACPI_TYPE_PACKAGE:
info->package_count++;
break;
default:
/* No init required, just exit now */
return (AE_OK);
}
/* If the object is already initialized, nothing else to do */
if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
return (AE_OK);
}
/* Must lock the interpreter before executing AML code */
acpi_ex_enter_interpreter();
/*
* Each of these types can contain executable AML code within the
* declaration.
*/
switch (type) {
case ACPI_TYPE_REGION:
info->op_region_init++;
status = acpi_ds_get_region_arguments(obj_desc);
break;
case ACPI_TYPE_BUFFER_FIELD:
info->field_init++;
status = acpi_ds_get_buffer_field_arguments(obj_desc);
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
info->field_init++;
status = acpi_ds_get_bank_field_arguments(obj_desc);
break;
case ACPI_TYPE_BUFFER:
info
|