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596 lines
16 KiB
596 lines
16 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: dswload - Dispatcher first pass namespace load callbacks |
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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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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acparser.h" |
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#include "amlcode.h" |
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#include "acdispat.h" |
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#include "acinterp.h" |
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#include "acnamesp.h" |
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#ifdef ACPI_ASL_COMPILER |
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#include "acdisasm.h" |
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#endif |
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#define _COMPONENT ACPI_DISPATCHER |
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ACPI_MODULE_NAME("dswload") |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ds_init_callbacks |
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* |
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* PARAMETERS: walk_state - Current state of the parse tree walk |
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* pass_number - 1, 2, or 3 |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Init walk state callbacks |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number) |
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{ |
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switch (pass_number) { |
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case 0: |
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|
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/* Parse only - caller will setup callbacks */ |
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walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | |
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ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE; |
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walk_state->descending_callback = NULL; |
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walk_state->ascending_callback = NULL; |
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break; |
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case 1: |
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/* Load pass 1 */ |
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walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | |
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ACPI_PARSE_DELETE_TREE; |
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walk_state->descending_callback = acpi_ds_load1_begin_op; |
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walk_state->ascending_callback = acpi_ds_load1_end_op; |
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break; |
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case 2: |
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/* Load pass 2 */ |
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walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | |
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ACPI_PARSE_DELETE_TREE; |
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walk_state->descending_callback = acpi_ds_load2_begin_op; |
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walk_state->ascending_callback = acpi_ds_load2_end_op; |
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break; |
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case 3: |
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/* Execution pass */ |
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walk_state->parse_flags |= ACPI_PARSE_EXECUTE | |
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ACPI_PARSE_DELETE_TREE; |
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walk_state->descending_callback = acpi_ds_exec_begin_op; |
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walk_state->ascending_callback = acpi_ds_exec_end_op; |
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break; |
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default: |
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return (AE_BAD_PARAMETER); |
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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_ds_load1_begin_op |
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* |
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* PARAMETERS: walk_state - Current state of the parse tree walk |
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* out_op - Where to return op if a new one is created |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Descending callback used during the loading of ACPI tables. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state, |
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union acpi_parse_object **out_op) |
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{ |
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union acpi_parse_object *op; |
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struct acpi_namespace_node *node; |
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acpi_status status; |
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acpi_object_type object_type; |
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char *path; |
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u32 flags; |
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ACPI_FUNCTION_TRACE_PTR(ds_load1_begin_op, walk_state->op); |
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op = walk_state->op; |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, |
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walk_state)); |
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/* We are only interested in opcodes that have an associated name */ |
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if (op) { |
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if (!(walk_state->op_info->flags & AML_NAMED)) { |
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*out_op = op; |
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return_ACPI_STATUS(AE_OK); |
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} |
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/* Check if this object has already been installed in the namespace */ |
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if (op->common.node) { |
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*out_op = op; |
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return_ACPI_STATUS(AE_OK); |
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} |
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} |
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path = acpi_ps_get_next_namestring(&walk_state->parser_state); |
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/* Map the raw opcode into an internal object type */ |
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object_type = walk_state->op_info->object_type; |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"State=%p Op=%p [%s]\n", walk_state, op, |
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acpi_ut_get_type_name(object_type))); |
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switch (walk_state->opcode) { |
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case AML_SCOPE_OP: |
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/* |
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* The target name of the Scope() operator must exist at this point so |
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* that we can actually open the scope to enter new names underneath it. |
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* Allow search-to-root for single namesegs. |
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*/ |
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status = |
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acpi_ns_lookup(walk_state->scope_info, path, object_type, |
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ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, |
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walk_state, &(node)); |
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#ifdef ACPI_ASL_COMPILER |
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if (status == AE_NOT_FOUND) { |
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/* |
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* Table disassembly: |
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* Target of Scope() not found. Generate an External for it, and |
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* insert the name into the namespace. |
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*/ |
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acpi_dm_add_op_to_external_list(op, path, |
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ACPI_TYPE_DEVICE, 0, 0); |
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status = |
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acpi_ns_lookup(walk_state->scope_info, path, |
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object_type, ACPI_IMODE_LOAD_PASS1, |
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ACPI_NS_SEARCH_PARENT, walk_state, |
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&node); |
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} |
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#endif |
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if (ACPI_FAILURE(status)) { |
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ACPI_ERROR_NAMESPACE(walk_state->scope_info, path, |
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status); |
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return_ACPI_STATUS(status); |
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} |
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/* |
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* Check to make sure that the target is |
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* one of the opcodes that actually opens a scope |
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*/ |
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switch (node->type) { |
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case ACPI_TYPE_ANY: |
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case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ |
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case ACPI_TYPE_DEVICE: |
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case ACPI_TYPE_POWER: |
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case ACPI_TYPE_PROCESSOR: |
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case ACPI_TYPE_THERMAL: |
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/* These are acceptable types */ |
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break; |
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case ACPI_TYPE_INTEGER: |
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case ACPI_TYPE_STRING: |
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case ACPI_TYPE_BUFFER: |
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/* |
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* These types we will allow, but we will change the type. |
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* This enables some existing code of the form: |
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* |
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* Name (DEB, 0) |
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* Scope (DEB) { ... } |
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* |
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* Note: silently change the type here. On the second pass, |
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* we will report a warning |
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*/ |
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
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"Type override - [%4.4s] had invalid type (%s) " |
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"for Scope operator, changed to type ANY\n", |
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acpi_ut_get_node_name(node), |
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acpi_ut_get_type_name(node->type))); |
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node->type = ACPI_TYPE_ANY; |
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walk_state->scope_info->common.value = ACPI_TYPE_ANY; |
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break; |
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case ACPI_TYPE_METHOD: |
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/* |
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* Allow scope change to root during execution of module-level |
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* code. Root is typed METHOD during this time. |
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*/ |
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if ((node == acpi_gbl_root_node) && |
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(walk_state-> |
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parse_flags & ACPI_PARSE_MODULE_LEVEL)) { |
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break; |
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} |
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ACPI_FALLTHROUGH; |
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default: |
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/* All other types are an error */ |
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ACPI_ERROR((AE_INFO, |
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"Invalid type (%s) for target of " |
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"Scope operator [%4.4s] (Cannot override)", |
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acpi_ut_get_type_name(node->type), |
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acpi_ut_get_node_name(node))); |
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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} |
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break; |
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default: |
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/* |
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* For all other named opcodes, we will enter the name into |
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* the namespace. |
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* |
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* Setup the search flags. |
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* Since we are entering a name into the namespace, we do not want to |
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* enable the search-to-root upsearch. |
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* |
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* There are only two conditions where it is acceptable that the name |
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* already exists: |
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* 1) the Scope() operator can reopen a scoping object that was |
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* previously defined (Scope, Method, Device, etc.) |
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* 2) Whenever we are parsing a deferred opcode (op_region, Buffer, |
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* buffer_field, or Package), the name of the object is already |
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* in the namespace. |
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*/ |
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if (walk_state->deferred_node) { |
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/* This name is already in the namespace, get the node */ |
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node = walk_state->deferred_node; |
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status = AE_OK; |
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break; |
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} |
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/* |
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* If we are executing a method, do not create any namespace objects |
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* during the load phase, only during execution. |
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*/ |
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if (walk_state->method_node) { |
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node = NULL; |
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status = AE_OK; |
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break; |
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} |
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flags = ACPI_NS_NO_UPSEARCH; |
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if ((walk_state->opcode != AML_SCOPE_OP) && |
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(!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) { |
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if (walk_state->namespace_override) { |
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flags |= ACPI_NS_OVERRIDE_IF_FOUND; |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"[%s] Override allowed\n", |
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acpi_ut_get_type_name |
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(object_type))); |
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} else { |
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flags |= ACPI_NS_ERROR_IF_FOUND; |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"[%s] Cannot already exist\n", |
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acpi_ut_get_type_name |
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(object_type))); |
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} |
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} else { |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"[%s] Both Find or Create allowed\n", |
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acpi_ut_get_type_name(object_type))); |
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} |
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/* |
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* Enter the named type into the internal namespace. We enter the name |
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* as we go downward in the parse tree. Any necessary subobjects that |
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* involve arguments to the opcode must be created as we go back up the |
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* parse tree later. |
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*/ |
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status = |
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acpi_ns_lookup(walk_state->scope_info, path, object_type, |
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ACPI_IMODE_LOAD_PASS1, flags, walk_state, |
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&node); |
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if (ACPI_FAILURE(status)) { |
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if (status == AE_ALREADY_EXISTS) { |
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/* The name already exists in this scope */ |
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if (node->flags & ANOBJ_IS_EXTERNAL) { |
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/* |
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* Allow one create on an object or segment that was |
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* previously declared External |
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*/ |
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node->flags &= ~ANOBJ_IS_EXTERNAL; |
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node->type = (u8) object_type; |
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/* Just retyped a node, probably will need to open a scope */ |
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if (acpi_ns_opens_scope(object_type)) { |
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status = |
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acpi_ds_scope_stack_push |
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(node, object_type, |
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walk_state); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS |
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(status); |
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} |
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} |
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status = AE_OK; |
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} |
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} |
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if (ACPI_FAILURE(status)) { |
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ACPI_ERROR_NAMESPACE(walk_state->scope_info, |
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path, status); |
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return_ACPI_STATUS(status); |
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} |
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} |
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break; |
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} |
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/* Common exit */ |
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if (!op) { |
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/* Create a new op */ |
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op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml); |
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if (!op) { |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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} |
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/* Initialize the op */ |
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#ifdef ACPI_CONSTANT_EVAL_ONLY |
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op->named.path = path; |
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#endif |
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if (node) { |
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/* |
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* Put the Node in the "op" object that the parser uses, so we |
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* can get it again quickly when this scope is closed |
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*/ |
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op->common.node = node; |
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op->named.name = node->name.integer; |
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} |
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acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state), |
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op); |
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*out_op = op; |
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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_ds_load1_end_op |
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* |
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* PARAMETERS: walk_state - Current state of the parse tree walk |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Ascending callback used during the loading of the namespace, |
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* both control methods and everything else. |
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* |
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******************************************************************************/ |
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acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state) |
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{ |
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union acpi_parse_object *op; |
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acpi_object_type object_type; |
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acpi_status status = AE_OK; |
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#ifdef ACPI_ASL_COMPILER |
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u8 param_count; |
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#endif |
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ACPI_FUNCTION_TRACE(ds_load1_end_op); |
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op = walk_state->op; |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, |
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walk_state)); |
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|
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/* |
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* Disassembler: handle create field operators here. |
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* |
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* create_buffer_field is a deferred op that is typically processed in load |
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* pass 2. However, disassembly of control method contents walk the parse |
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* tree with ACPI_PARSE_LOAD_PASS1 and AML_CREATE operators are processed |
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* in a later walk. This is a problem when there is a control method that |
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* has the same name as the AML_CREATE object. In this case, any use of the |
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* name segment will be detected as a method call rather than a reference |
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* to a buffer field. |
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* |
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* This earlier creation during disassembly solves this issue by inserting |
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* the named object in the ACPI namespace so that references to this name |
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* would be a name string rather than a method call. |
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*/ |
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if ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) && |
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(walk_state->op_info->flags & AML_CREATE)) { |
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status = acpi_ds_create_buffer_field(op, walk_state); |
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return_ACPI_STATUS(status); |
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} |
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/* We are only interested in opcodes that have an associated name */ |
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if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) { |
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return_ACPI_STATUS(AE_OK); |
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} |
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/* Get the object type to determine if we should pop the scope */ |
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object_type = walk_state->op_info->object_type; |
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if (walk_state->op_info->flags & AML_FIELD) { |
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/* |
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* If we are executing a method, do not create any namespace objects |
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* during the load phase, only during execution. |
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*/ |
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if (!walk_state->method_node) { |
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if (walk_state->opcode == AML_FIELD_OP || |
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walk_state->opcode == AML_BANK_FIELD_OP || |
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walk_state->opcode == AML_INDEX_FIELD_OP) { |
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status = |
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acpi_ds_init_field_objects(op, walk_state); |
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} |
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} |
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return_ACPI_STATUS(status); |
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} |
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/* |
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* If we are executing a method, do not create any namespace objects |
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* during the load phase, only during execution. |
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*/ |
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if (!walk_state->method_node) { |
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if (op->common.aml_opcode == AML_REGION_OP) { |
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status = |
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acpi_ex_create_region(op->named.data, |
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op->named.length, |
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(acpi_adr_space_type) |
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((op->common.value.arg)-> |
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common.value.integer), |
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walk_state); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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} else if (op->common.aml_opcode == AML_DATA_REGION_OP) { |
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status = |
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acpi_ex_create_region(op->named.data, |
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op->named.length, |
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ACPI_ADR_SPACE_DATA_TABLE, |
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walk_state); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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} |
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} |
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|
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if (op->common.aml_opcode == AML_NAME_OP) { |
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|
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/* For Name opcode, get the object type from the argument */ |
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if (op->common.value.arg) { |
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object_type = (acpi_ps_get_opcode_info((op->common. |
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value.arg)-> |
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common. |
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aml_opcode))-> |
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object_type; |
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|
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/* Set node type if we have a namespace node */ |
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if (op->common.node) { |
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op->common.node->type = (u8) object_type; |
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} |
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} |
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} |
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#ifdef ACPI_ASL_COMPILER |
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/* |
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* For external opcode, get the object type from the argument and |
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* get the parameter count from the argument's next. |
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*/ |
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if (acpi_gbl_disasm_flag && |
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op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) { |
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/* |
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* Note, if this external is not a method |
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* Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0 |
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* Therefore, param_count will be 0. |
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*/ |
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param_count = |
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(u8)op->common.value.arg->common.next->common.value.integer; |
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object_type = (u8)op->common.value.arg->common.value.integer; |
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op->common.node->flags |= ANOBJ_IS_EXTERNAL; |
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op->common.node->type = (u8)object_type; |
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acpi_dm_create_subobject_for_external((u8)object_type, |
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&op->common.node, |
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param_count); |
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/* |
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* Add the external to the external list because we may be |
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* emitting code based off of the items within the external list. |
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*/ |
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acpi_dm_add_op_to_external_list(op, op->named.path, |
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(u8)object_type, param_count, |
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ACPI_EXT_ORIGIN_FROM_OPCODE | |
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ACPI_EXT_RESOLVED_REFERENCE); |
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} |
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#endif |
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/* |
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* If we are executing a method, do not create any namespace objects |
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* during the load phase, only during execution. |
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*/ |
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if (!walk_state->method_node) { |
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if (op->common.aml_opcode == AML_METHOD_OP) { |
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/* |
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* method_op pkg_length name_string method_flags term_list |
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* |
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* Note: We must create the method node/object pair as soon as we |
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* see the method declaration. This allows later pass1 parsing |
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* of invocations of the method (need to know the number of |
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* arguments.) |
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*/ |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"LOADING-Method: State=%p Op=%p NamedObj=%p\n", |
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walk_state, op, op->named.node)); |
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|
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if (!acpi_ns_get_attached_object(op->named.node)) { |
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walk_state->operands[0] = |
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ACPI_CAST_PTR(void, op->named.node); |
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walk_state->num_operands = 1; |
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|
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status = |
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acpi_ds_create_operands(walk_state, |
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op->common.value. |
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arg); |
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if (ACPI_SUCCESS(status)) { |
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status = |
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acpi_ex_create_method(op->named. |
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data, |
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op->named. |
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length, |
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walk_state); |
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} |
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walk_state->operands[0] = NULL; |
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walk_state->num_operands = 0; |
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|
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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} |
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} |
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} |
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|
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/* Pop the scope stack (only if loading a table) */ |
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|
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if (!walk_state->method_node && |
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op->common.aml_opcode != AML_EXTERNAL_OP && |
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acpi_ns_opens_scope(object_type)) { |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"(%s): Popping scope for Op %p\n", |
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acpi_ut_get_type_name(object_type), op)); |
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status = acpi_ds_scope_stack_pop(walk_state); |
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} |
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|
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return_ACPI_STATUS(status); |
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}
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