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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.02/******************************************************************************3 *4 * Module Name: dswscope - Scope stack manipulation5 *6 * Copyright (C) 2000 - 2023, Intel Corp.7 *8 *****************************************************************************/9 10#include <acpi/acpi.h>11#include "accommon.h"12#include "acdispat.h"13 14#define _COMPONENT ACPI_DISPATCHER15ACPI_MODULE_NAME("dswscope")16 17/****************************************************************************18 *19 * FUNCTION: acpi_ds_scope_stack_clear20 *21 * PARAMETERS: walk_state - Current state22 *23 * RETURN: None24 *25 * DESCRIPTION: Pop (and free) everything on the scope stack except the26 * root scope object (which remains at the stack top.)27 *28 ***************************************************************************/29void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state)30{31 union acpi_generic_state *scope_info;32 33 ACPI_FUNCTION_NAME(ds_scope_stack_clear);34 35 while (walk_state->scope_info) {36 37 /* Pop a scope off the stack */38 39 scope_info = walk_state->scope_info;40 walk_state->scope_info = scope_info->scope.next;41 42 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,43 "Popped object type (%s)\n",44 acpi_ut_get_type_name(scope_info->common.45 value)));46 47 acpi_ut_delete_generic_state(scope_info);48 }49}50 51/****************************************************************************52 *53 * FUNCTION: acpi_ds_scope_stack_push54 *55 * PARAMETERS: node - Name to be made current56 * type - Type of frame being pushed57 * walk_state - Current state58 *59 * RETURN: Status60 *61 * DESCRIPTION: Push the current scope on the scope stack, and make the62 * passed Node current.63 *64 ***************************************************************************/65 66acpi_status67acpi_ds_scope_stack_push(struct acpi_namespace_node *node,68 acpi_object_type type,69 struct acpi_walk_state *walk_state)70{71 union acpi_generic_state *scope_info;72 union acpi_generic_state *old_scope_info;73 74 ACPI_FUNCTION_TRACE(ds_scope_stack_push);75 76 if (!node) {77 78 /* Invalid scope */79 80 ACPI_ERROR((AE_INFO, "Null scope parameter"));81 return_ACPI_STATUS(AE_BAD_PARAMETER);82 }83 84 /* Make sure object type is valid */85 86 if (!acpi_ut_valid_object_type(type)) {87 ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type));88 }89 90 /* Allocate a new scope object */91 92 scope_info = acpi_ut_create_generic_state();93 if (!scope_info) {94 return_ACPI_STATUS(AE_NO_MEMORY);95 }96 97 /* Init new scope object */98 99 scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE;100 scope_info->scope.node = node;101 scope_info->common.value = (u16) type;102 103 walk_state->scope_depth++;104 105 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,106 "[%.2d] Pushed scope ",107 (u32) walk_state->scope_depth));108 109 old_scope_info = walk_state->scope_info;110 if (old_scope_info) {111 ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,112 "[%4.4s] (%s)",113 acpi_ut_get_node_name(old_scope_info->114 scope.node),115 acpi_ut_get_type_name(old_scope_info->116 common.value)));117 } else {118 ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, ACPI_NAMESPACE_ROOT));119 }120 121 ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,122 ", New scope -> [%4.4s] (%s)\n",123 acpi_ut_get_node_name(scope_info->scope.node),124 acpi_ut_get_type_name(scope_info->common.value)));125 126 /* Push new scope object onto stack */127 128 acpi_ut_push_generic_state(&walk_state->scope_info, scope_info);129 return_ACPI_STATUS(AE_OK);130}131 132/****************************************************************************133 *134 * FUNCTION: acpi_ds_scope_stack_pop135 *136 * PARAMETERS: walk_state - Current state137 *138 * RETURN: Status139 *140 * DESCRIPTION: Pop the scope stack once.141 *142 ***************************************************************************/143 144acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state)145{146 union acpi_generic_state *scope_info;147 union acpi_generic_state *new_scope_info;148 149 ACPI_FUNCTION_TRACE(ds_scope_stack_pop);150 151 /*152 * Pop scope info object off the stack.153 */154 scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info);155 if (!scope_info) {156 return_ACPI_STATUS(AE_STACK_UNDERFLOW);157 }158 159 walk_state->scope_depth--;160 161 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,162 "[%.2d] Popped scope [%4.4s] (%s), New scope -> ",163 (u32) walk_state->scope_depth,164 acpi_ut_get_node_name(scope_info->scope.node),165 acpi_ut_get_type_name(scope_info->common.value)));166 167 new_scope_info = walk_state->scope_info;168 if (new_scope_info) {169 ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[%4.4s] (%s)\n",170 acpi_ut_get_node_name(new_scope_info->171 scope.node),172 acpi_ut_get_type_name(new_scope_info->173 common.value)));174 } else {175 ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "%s\n",176 ACPI_NAMESPACE_ROOT));177 }178 179 acpi_ut_delete_generic_state(scope_info);180 return_ACPI_STATUS(AE_OK);181}182