mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
261 lines
7.6 KiB
261 lines
7.6 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
|
/****************************************************************************** |
|
* |
|
* Module Name: exstoren - AML Interpreter object store support, |
|
* Store to Node (namespace object) |
|
* |
|
* Copyright (C) 2000 - 2021, Intel Corp. |
|
* |
|
*****************************************************************************/ |
|
|
|
#include <acpi/acpi.h> |
|
#include "accommon.h" |
|
#include "acinterp.h" |
|
#include "amlcode.h" |
|
|
|
#define _COMPONENT ACPI_EXECUTER |
|
ACPI_MODULE_NAME("exstoren") |
|
|
|
/******************************************************************************* |
|
* |
|
* FUNCTION: acpi_ex_resolve_object |
|
* |
|
* PARAMETERS: source_desc_ptr - Pointer to the source object |
|
* target_type - Current type of the target |
|
* walk_state - Current walk state |
|
* |
|
* RETURN: Status, resolved object in source_desc_ptr. |
|
* |
|
* DESCRIPTION: Resolve an object. If the object is a reference, dereference |
|
* it and return the actual object in the source_desc_ptr. |
|
* |
|
******************************************************************************/ |
|
acpi_status |
|
acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr, |
|
acpi_object_type target_type, |
|
struct acpi_walk_state *walk_state) |
|
{ |
|
union acpi_operand_object *source_desc = *source_desc_ptr; |
|
acpi_status status = AE_OK; |
|
|
|
ACPI_FUNCTION_TRACE(ex_resolve_object); |
|
|
|
/* Ensure we have a Target that can be stored to */ |
|
|
|
switch (target_type) { |
|
case ACPI_TYPE_BUFFER_FIELD: |
|
case ACPI_TYPE_LOCAL_REGION_FIELD: |
|
case ACPI_TYPE_LOCAL_BANK_FIELD: |
|
case ACPI_TYPE_LOCAL_INDEX_FIELD: |
|
/* |
|
* These cases all require only Integers or values that |
|
* can be converted to Integers (Strings or Buffers) |
|
*/ |
|
case ACPI_TYPE_INTEGER: |
|
case ACPI_TYPE_STRING: |
|
case ACPI_TYPE_BUFFER: |
|
/* |
|
* Stores into a Field/Region or into a Integer/Buffer/String |
|
* are all essentially the same. This case handles the |
|
* "interchangeable" types Integer, String, and Buffer. |
|
*/ |
|
if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) { |
|
|
|
/* Resolve a reference object first */ |
|
|
|
status = |
|
acpi_ex_resolve_to_value(source_desc_ptr, |
|
walk_state); |
|
if (ACPI_FAILURE(status)) { |
|
break; |
|
} |
|
} |
|
|
|
/* For copy_object, no further validation necessary */ |
|
|
|
if (walk_state->opcode == AML_COPY_OBJECT_OP) { |
|
break; |
|
} |
|
|
|
/* Must have a Integer, Buffer, or String */ |
|
|
|
if ((source_desc->common.type != ACPI_TYPE_INTEGER) && |
|
(source_desc->common.type != ACPI_TYPE_BUFFER) && |
|
(source_desc->common.type != ACPI_TYPE_STRING) && |
|
!((source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) && |
|
(source_desc->reference.class == ACPI_REFCLASS_TABLE))) { |
|
|
|
/* Conversion successful but still not a valid type */ |
|
|
|
ACPI_ERROR((AE_INFO, |
|
"Cannot assign type [%s] to [%s] (must be type Int/Str/Buf)", |
|
acpi_ut_get_object_type_name(source_desc), |
|
acpi_ut_get_type_name(target_type))); |
|
|
|
status = AE_AML_OPERAND_TYPE; |
|
} |
|
break; |
|
|
|
case ACPI_TYPE_LOCAL_ALIAS: |
|
case ACPI_TYPE_LOCAL_METHOD_ALIAS: |
|
/* |
|
* All aliases should have been resolved earlier, during the |
|
* operand resolution phase. |
|
*/ |
|
ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object")); |
|
status = AE_AML_INTERNAL; |
|
break; |
|
|
|
case ACPI_TYPE_PACKAGE: |
|
default: |
|
/* |
|
* All other types than Alias and the various Fields come here, |
|
* including the untyped case - ACPI_TYPE_ANY. |
|
*/ |
|
break; |
|
} |
|
|
|
return_ACPI_STATUS(status); |
|
} |
|
|
|
/******************************************************************************* |
|
* |
|
* FUNCTION: acpi_ex_store_object_to_object |
|
* |
|
* PARAMETERS: source_desc - Object to store |
|
* dest_desc - Object to receive a copy of the source |
|
* new_desc - New object if dest_desc is obsoleted |
|
* walk_state - Current walk state |
|
* |
|
* RETURN: Status |
|
* |
|
* DESCRIPTION: "Store" an object to another object. This may include |
|
* converting the source type to the target type (implicit |
|
* conversion), and a copy of the value of the source to |
|
* the target. |
|
* |
|
* The Assignment of an object to another (not named) object |
|
* is handled here. |
|
* The Source passed in will replace the current value (if any) |
|
* with the input value. |
|
* |
|
* When storing into an object the data is converted to the |
|
* target object type then stored in the object. This means |
|
* that the target object type (for an initialized target) will |
|
* not be changed by a store operation. |
|
* |
|
* This module allows destination types of Number, String, |
|
* Buffer, and Package. |
|
* |
|
* Assumes parameters are already validated. NOTE: source_desc |
|
* resolution (from a reference object) must be performed by |
|
* the caller if necessary. |
|
* |
|
******************************************************************************/ |
|
|
|
acpi_status |
|
acpi_ex_store_object_to_object(union acpi_operand_object *source_desc, |
|
union acpi_operand_object *dest_desc, |
|
union acpi_operand_object **new_desc, |
|
struct acpi_walk_state *walk_state) |
|
{ |
|
union acpi_operand_object *actual_src_desc; |
|
acpi_status status = AE_OK; |
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc); |
|
|
|
actual_src_desc = source_desc; |
|
if (!dest_desc) { |
|
/* |
|
* There is no destination object (An uninitialized node or |
|
* package element), so we can simply copy the source object |
|
* creating a new destination object |
|
*/ |
|
status = |
|
acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc, |
|
walk_state); |
|
return_ACPI_STATUS(status); |
|
} |
|
|
|
if (source_desc->common.type != dest_desc->common.type) { |
|
/* |
|
* The source type does not match the type of the destination. |
|
* Perform the "implicit conversion" of the source to the current type |
|
* of the target as per the ACPI specification. |
|
* |
|
* If no conversion performed, actual_src_desc = source_desc. |
|
* Otherwise, actual_src_desc is a temporary object to hold the |
|
* converted object. |
|
*/ |
|
status = acpi_ex_convert_to_target_type(dest_desc->common.type, |
|
source_desc, |
|
&actual_src_desc, |
|
walk_state); |
|
if (ACPI_FAILURE(status)) { |
|
return_ACPI_STATUS(status); |
|
} |
|
|
|
if (source_desc == actual_src_desc) { |
|
/* |
|
* No conversion was performed. Return the source_desc as the |
|
* new object. |
|
*/ |
|
*new_desc = source_desc; |
|
return_ACPI_STATUS(AE_OK); |
|
} |
|
} |
|
|
|
/* |
|
* We now have two objects of identical types, and we can perform a |
|
* copy of the *value* of the source object. |
|
*/ |
|
switch (dest_desc->common.type) { |
|
case ACPI_TYPE_INTEGER: |
|
|
|
dest_desc->integer.value = actual_src_desc->integer.value; |
|
|
|
/* Truncate value if we are executing from a 32-bit ACPI table */ |
|
|
|
(void)acpi_ex_truncate_for32bit_table(dest_desc); |
|
break; |
|
|
|
case ACPI_TYPE_STRING: |
|
|
|
status = |
|
acpi_ex_store_string_to_string(actual_src_desc, dest_desc); |
|
break; |
|
|
|
case ACPI_TYPE_BUFFER: |
|
|
|
status = |
|
acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc); |
|
break; |
|
|
|
case ACPI_TYPE_PACKAGE: |
|
|
|
status = |
|
acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc, |
|
walk_state); |
|
break; |
|
|
|
default: |
|
/* |
|
* All other types come here. |
|
*/ |
|
ACPI_WARNING((AE_INFO, "Store into type [%s] not implemented", |
|
acpi_ut_get_object_type_name(dest_desc))); |
|
|
|
status = AE_NOT_IMPLEMENTED; |
|
break; |
|
} |
|
|
|
if (actual_src_desc != source_desc) { |
|
|
|
/* Delete the intermediate (temporary) source object */ |
|
|
|
acpi_ut_remove_reference(actual_src_desc); |
|
} |
|
|
|
*new_desc = dest_desc; |
|
return_ACPI_STATUS(status); |
|
}
|
|
|