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679 lines
19 KiB
679 lines
19 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: nsinit - namespace initialization |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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|
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acnamesp.h" |
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#include "acdispat.h" |
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#include "acinterp.h" |
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#include "acevents.h" |
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#define _COMPONENT ACPI_NAMESPACE |
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ACPI_MODULE_NAME("nsinit") |
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|
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/* Local prototypes */ |
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static acpi_status |
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acpi_ns_init_one_object(acpi_handle obj_handle, |
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u32 level, void *context, void **return_value); |
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static acpi_status |
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acpi_ns_init_one_device(acpi_handle obj_handle, |
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u32 nesting_level, void *context, void **return_value); |
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static acpi_status |
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acpi_ns_find_ini_methods(acpi_handle obj_handle, |
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u32 nesting_level, void *context, void **return_value); |
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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 acpi_ns_initialize_objects(void) |
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{ |
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acpi_status status; |
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struct acpi_init_walk_info info; |
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ACPI_FUNCTION_TRACE(ns_initialize_objects); |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"[Init] Completing Initialization of ACPI Objects\n")); |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"**** Starting initialization of namespace objects ****\n")); |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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"Final data object initialization: ")); |
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/* Clear the info block */ |
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memset(&info, 0, sizeof(struct acpi_init_walk_info)); |
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/* Walk entire namespace from the supplied root */ |
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/* |
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* TBD: will become ACPI_TYPE_PACKAGE as this type object |
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* is now the only one that supports deferred initialization |
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* (forward references). |
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*/ |
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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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NULL, &info, NULL); |
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if (ACPI_FAILURE(status)) { |
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ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); |
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} |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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"Namespace contains %u (0x%X) objects\n", |
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info.object_count, info.object_count)); |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"%u Control Methods found\n%u Op Regions found\n", |
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info.method_count, info.op_region_count)); |
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return_ACPI_STATUS(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 acpi_ns_initialize_devices(u32 flags) |
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{ |
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acpi_status status = AE_OK; |
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struct acpi_device_walk_info info; |
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acpi_handle handle; |
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ACPI_FUNCTION_TRACE(ns_initialize_devices); |
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if (!(flags & ACPI_NO_DEVICE_INIT)) { |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"[Init] Initializing ACPI Devices\n")); |
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/* Init counters */ |
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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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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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"Initializing Device/Processor/Thermal objects " |
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"and executing _INI/_STA methods:\n")); |
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/* Tree analysis: find all subtrees that contain _INI methods */ |
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
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ACPI_UINT32_MAX, FALSE, |
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acpi_ns_find_ini_methods, NULL, |
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&info, NULL); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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/* Allocate the evaluation information block */ |
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info.evaluate_info = |
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ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
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if (!info.evaluate_info) { |
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status = AE_NO_MEMORY; |
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goto error_exit; |
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} |
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/* |
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* Execute the "global" _INI method that may appear at the root. |
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* This support is provided for Windows compatibility (Vista+) and |
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* is not part of the ACPI specification. |
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*/ |
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info.evaluate_info->prefix_node = acpi_gbl_root_node; |
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info.evaluate_info->relative_pathname = METHOD_NAME__INI; |
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info.evaluate_info->parameters = NULL; |
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info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; |
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status = acpi_ns_evaluate(info.evaluate_info); |
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if (ACPI_SUCCESS(status)) { |
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info.num_INI++; |
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} |
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/* |
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* Execute \_SB._INI. |
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* There appears to be a strict order requirement for \_SB._INI, |
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* which should be evaluated before any _REG evaluations. |
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*/ |
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status = acpi_get_handle(NULL, "\\_SB", &handle); |
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if (ACPI_SUCCESS(status)) { |
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memset(info.evaluate_info, 0, |
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sizeof(struct acpi_evaluate_info)); |
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info.evaluate_info->prefix_node = handle; |
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info.evaluate_info->relative_pathname = |
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METHOD_NAME__INI; |
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info.evaluate_info->parameters = NULL; |
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info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; |
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status = acpi_ns_evaluate(info.evaluate_info); |
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if (ACPI_SUCCESS(status)) { |
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info.num_INI++; |
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} |
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} |
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} |
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/* |
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* Run all _REG methods |
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* |
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* Note: Any objects accessed by the _REG methods will be automatically |
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* initialized, even if they contain executable AML (see the call to |
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* acpi_ns_initialize_objects below). |
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* |
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* Note: According to the ACPI specification, we actually needn't execute |
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* _REG for system_memory/system_io operation regions, but for PCI_Config |
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* operation regions, it is required to evaluate _REG for those on a PCI |
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* root bus that doesn't contain _BBN object. So this code is kept here |
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* in order not to break things. |
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*/ |
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if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"[Init] Executing _REG OpRegion methods\n")); |
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status = acpi_ev_initialize_op_regions(); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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} |
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if (!(flags & ACPI_NO_DEVICE_INIT)) { |
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/* Walk namespace to execute all _INIs on present devices */ |
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
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ACPI_UINT32_MAX, FALSE, |
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acpi_ns_init_one_device, NULL, |
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&info, NULL); |
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/* |
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* Any _OSI requests should be completed by now. If the BIOS has |
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* requested any Windows OSI strings, we will always truncate |
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* I/O addresses to 16 bits -- for Windows compatibility. |
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*/ |
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if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) { |
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acpi_gbl_truncate_io_addresses = TRUE; |
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} |
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ACPI_FREE(info.evaluate_info); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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" Executed %u _INI methods requiring %u _STA executions " |
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"(examined %u objects)\n", |
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info.num_INI, info.num_STA, |
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info.device_count)); |
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} |
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return_ACPI_STATUS(status); |
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error_exit: |
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ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ns_init_one_package |
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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 - Not used |
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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 package |
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* within the namespace. Used during dynamic load of an SSDT. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ns_init_one_package(acpi_handle obj_handle, |
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u32 level, void *context, void **return_value) |
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{ |
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acpi_status status; |
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union acpi_operand_object *obj_desc; |
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struct acpi_namespace_node *node = |
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(struct acpi_namespace_node *)obj_handle; |
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obj_desc = acpi_ns_get_attached_object(node); |
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if (!obj_desc) { |
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return (AE_OK); |
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} |
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/* Exit if package is already initialized */ |
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if (obj_desc->package.flags & AOPOBJ_DATA_VALID) { |
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return (AE_OK); |
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} |
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status = acpi_ds_get_package_arguments(obj_desc); |
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if (ACPI_FAILURE(status)) { |
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return (AE_OK); |
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} |
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status = |
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acpi_ut_walk_package_tree(obj_desc, NULL, |
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acpi_ds_init_package_element, NULL); |
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if (ACPI_FAILURE(status)) { |
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return (AE_OK); |
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} |
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obj_desc->package.flags |= AOPOBJ_DATA_VALID; |
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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_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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static acpi_status |
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acpi_ns_init_one_object(acpi_handle obj_handle, |
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u32 level, void *context, void **return_value) |
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{ |
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acpi_object_type type; |
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acpi_status status = AE_OK; |
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struct acpi_init_walk_info *info = |
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(struct acpi_init_walk_info *)context; |
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struct acpi_namespace_node *node = |
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(struct acpi_namespace_node *)obj_handle; |
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union acpi_operand_object *obj_desc; |
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ACPI_FUNCTION_NAME(ns_init_one_object); |
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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 = acpi_ns_get_attached_object(node); |
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if (!obj_desc) { |
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return (AE_OK); |
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} |
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/* Increment counters for object types we are looking for */ |
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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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break; |
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case ACPI_TYPE_BUFFER_FIELD: |
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info->field_count++; |
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break; |
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case ACPI_TYPE_LOCAL_BANK_FIELD: |
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info->field_count++; |
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break; |
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case ACPI_TYPE_BUFFER: |
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info->buffer_count++; |
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break; |
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case ACPI_TYPE_PACKAGE: |
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info->package_count++; |
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break; |
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default: |
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/* No init required, just exit now */ |
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return (AE_OK); |
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} |
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/* If the object is already initialized, nothing else to do */ |
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if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { |
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return (AE_OK); |
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} |
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/* Must lock the interpreter before executing AML code */ |
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acpi_ex_enter_interpreter(); |
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/* |
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* Only initialization of Package objects can be deferred, in order |
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* to support forward references. |
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*/ |
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switch (type) { |
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case ACPI_TYPE_LOCAL_BANK_FIELD: |
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/* TBD: bank_fields do not require deferred init, remove this code */ |
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info->field_init++; |
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status = acpi_ds_get_bank_field_arguments(obj_desc); |
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break; |
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case ACPI_TYPE_PACKAGE: |
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/* Complete the initialization/resolution of the package object */ |
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info->package_init++; |
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status = |
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acpi_ns_init_one_package(obj_handle, level, NULL, NULL); |
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break; |
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default: |
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/* No other types should get here */ |
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status = AE_TYPE; |
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ACPI_EXCEPTION((AE_INFO, status, |
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"Opcode is not deferred [%4.4s] (%s)", |
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acpi_ut_get_node_name(node), |
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acpi_ut_get_type_name(type))); |
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break; |
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} |
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if (ACPI_FAILURE(status)) { |
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ACPI_EXCEPTION((AE_INFO, status, |
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"Could not execute arguments for [%4.4s] (%s)", |
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acpi_ut_get_node_name(node), |
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acpi_ut_get_type_name(type))); |
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} |
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/* |
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* We ignore errors from above, and always return OK, since we don't want |
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* to abort the walk on any single error. |
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*/ |
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acpi_ex_exit_interpreter(); |
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return (AE_OK); |
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} |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ns_find_ini_methods |
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* |
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* PARAMETERS: acpi_walk_callback |
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* |
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* RETURN: acpi_status |
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* |
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* DESCRIPTION: Called during namespace walk. Finds objects named _INI under |
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* device/processor/thermal objects, and marks the entire subtree |
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* with a SUBTREE_HAS_INI flag. This flag is used during the |
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* subsequent device initialization walk to avoid entire subtrees |
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* that do not contain an _INI. |
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* |
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******************************************************************************/ |
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static acpi_status |
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acpi_ns_find_ini_methods(acpi_handle obj_handle, |
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u32 nesting_level, void *context, void **return_value) |
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{ |
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struct acpi_device_walk_info *info = |
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ACPI_CAST_PTR(struct acpi_device_walk_info, context); |
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struct acpi_namespace_node *node; |
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struct acpi_namespace_node *parent_node; |
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/* Keep count of device/processor/thermal objects */ |
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node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); |
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if ((node->type == ACPI_TYPE_DEVICE) || |
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(node->type == ACPI_TYPE_PROCESSOR) || |
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(node->type == ACPI_TYPE_THERMAL)) { |
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info->device_count++; |
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return (AE_OK); |
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} |
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/* We are only looking for methods named _INI */ |
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if (!ACPI_COMPARE_NAMESEG(node->name.ascii, METHOD_NAME__INI)) { |
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return (AE_OK); |
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} |
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/* |
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* The only _INI methods that we care about are those that are |
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* present under Device, Processor, and Thermal objects. |
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*/ |
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parent_node = node->parent; |
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switch (parent_node->type) { |
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case ACPI_TYPE_DEVICE: |
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case ACPI_TYPE_PROCESSOR: |
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case ACPI_TYPE_THERMAL: |
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|
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/* Mark parent and bubble up the INI present flag to the root */ |
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while (parent_node) { |
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parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; |
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parent_node = parent_node->parent; |
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} |
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break; |
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default: |
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break; |
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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: acpi_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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static acpi_status |
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acpi_ns_init_one_device(acpi_handle obj_handle, |
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u32 nesting_level, void *context, void **return_value) |
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{ |
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struct acpi_device_walk_info *walk_info = |
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ACPI_CAST_PTR(struct acpi_device_walk_info, context); |
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struct acpi_evaluate_info *info = walk_info->evaluate_info; |
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u32 flags; |
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acpi_status status; |
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struct acpi_namespace_node *device_node; |
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ACPI_FUNCTION_TRACE(ns_init_one_device); |
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/* We are interested in Devices, Processors and thermal_zones only */ |
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device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); |
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if ((device_node->type != ACPI_TYPE_DEVICE) && |
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(device_node->type != ACPI_TYPE_PROCESSOR) && |
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(device_node->type != ACPI_TYPE_THERMAL)) { |
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return_ACPI_STATUS(AE_OK); |
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} |
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|
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/* |
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* Because of an earlier namespace analysis, all subtrees that contain an |
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* _INI method are tagged. |
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* |
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* If this device subtree does not contain any _INI methods, we |
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* can exit now and stop traversing this entire subtree. |
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*/ |
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if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { |
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return_ACPI_STATUS(AE_CTRL_DEPTH); |
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} |
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|
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/* |
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* Run _STA to determine if this device is present and functioning. We |
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* must know this information for two important reasons (from ACPI spec): |
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* |
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* 1) We can only run _INI if the device is present. |
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* 2) We must abort the device tree walk on this subtree if the device is |
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* not present and is not functional (we will not examine the children) |
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* |
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* The _STA method is not required to be present under the device, we |
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* assume the device is present if _STA does not exist. |
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*/ |
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ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
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(ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); |
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status = acpi_ut_execute_STA(device_node, &flags); |
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if (ACPI_FAILURE(status)) { |
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|
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/* Ignore error and move on to next device */ |
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|
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return_ACPI_STATUS(AE_OK); |
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} |
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|
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/* |
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* Flags == -1 means that _STA was not found. In this case, we assume that |
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* the device is both present and functional. |
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* |
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* From the ACPI spec, description of _STA: |
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* |
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* "If a device object (including the processor object) does not have an |
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* _STA object, then OSPM assumes that all of the above bits are set (in |
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* other words, the device is present, ..., and functioning)" |
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*/ |
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if (flags != ACPI_UINT32_MAX) { |
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walk_info->num_STA++; |
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} |
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|
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/* |
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* Examine the PRESENT and FUNCTIONING status bits |
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* |
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* Note: ACPI spec does not seem to specify behavior for the present but |
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* not functioning case, so we assume functioning if present. |
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*/ |
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if (!(flags & ACPI_STA_DEVICE_PRESENT)) { |
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|
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/* Device is not present, we must examine the Functioning bit */ |
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|
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if (flags & ACPI_STA_DEVICE_FUNCTIONING) { |
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/* |
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* Device is not present but is "functioning". In this case, |
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* we will not run _INI, but we continue to examine the children |
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* of this device. |
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* |
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* From the ACPI spec, description of _STA: (note - no mention |
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* of whether to run _INI or not on the device in question) |
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* |
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* "_STA may return bit 0 clear (not present) with bit 3 set |
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* (device is functional). This case is used to indicate a valid |
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* device for which no device driver should be loaded (for example, |
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* a bridge device.) Children of this device may be present and |
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* valid. OSPM should continue enumeration below a device whose |
|
* _STA returns this bit combination" |
|
*/ |
|
return_ACPI_STATUS(AE_OK); |
|
} else { |
|
/* |
|
* Device is not present and is not functioning. We must abort the |
|
* walk of this subtree immediately -- don't look at the children |
|
* of such a device. |
|
* |
|
* From the ACPI spec, description of _INI: |
|
* |
|
* "If the _STA method indicates that the device is not present, |
|
* OSPM will not run the _INI and will not examine the children |
|
* of the device for _INI methods" |
|
*/ |
|
return_ACPI_STATUS(AE_CTRL_DEPTH); |
|
} |
|
} |
|
|
|
/* |
|
* The device is present or is assumed present if no _STA exists. |
|
* Run the _INI if it exists (not required to exist) |
|
* |
|
* Note: We know there is an _INI within this subtree, but it may not be |
|
* under this particular device, it may be lower in the branch. |
|
*/ |
|
if (!ACPI_COMPARE_NAMESEG(device_node->name.ascii, "_SB_") || |
|
device_node->parent != acpi_gbl_root_node) { |
|
ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
|
(ACPI_TYPE_METHOD, device_node, |
|
METHOD_NAME__INI)); |
|
|
|
memset(info, 0, sizeof(struct acpi_evaluate_info)); |
|
info->prefix_node = device_node; |
|
info->relative_pathname = METHOD_NAME__INI; |
|
info->parameters = NULL; |
|
info->flags = ACPI_IGNORE_RETURN_VALUE; |
|
|
|
status = acpi_ns_evaluate(info); |
|
if (ACPI_SUCCESS(status)) { |
|
walk_info->num_INI++; |
|
} |
|
#ifdef ACPI_DEBUG_OUTPUT |
|
else if (status != AE_NOT_FOUND) { |
|
|
|
/* Ignore error and move on to next device */ |
|
|
|
char *scope_name = |
|
acpi_ns_get_normalized_pathname(device_node, TRUE); |
|
|
|
ACPI_EXCEPTION((AE_INFO, status, |
|
"during %s._INI execution", |
|
scope_name)); |
|
ACPI_FREE(scope_name); |
|
} |
|
#endif |
|
} |
|
|
|
/* Ignore errors from above */ |
|
|
|
status = AE_OK; |
|
|
|
/* |
|
* The _INI method has been run if present; call the Global Initialization |
|
* Handler for this device. |
|
*/ |
|
if (acpi_gbl_init_handler) { |
|
status = |
|
acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); |
|
} |
|
|
|
return_ACPI_STATUS(status); |
|
}
|
|
|