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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: dswscope - Scope stack manipulation
*
* Copyright (C) 2000 - 2020, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acdispat.h"
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME("dswscope")
/****************************************************************************
*
* FUNCTION: acpi_ds_scope_stack_clear
*
* PARAMETERS: walk_state - Current state
*
* RETURN: None
*
* DESCRIPTION: Pop (and free) everything on the scope stack except the
* root scope object (which remains at the stack top.)
*
***************************************************************************/
void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state)
{
union acpi_generic_state *scope_info;
ACPI_FUNCTION_NAME(ds_scope_stack_clear);
while (walk_state->scope_info) {
/* Pop a scope off the stack */
scope_info = walk_state->scope_info;
walk_state->scope_info = scope_info->scope.next;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Popped object type (%s)\n",
acpi_ut_get_type_name(scope_info->common.
value)));
acpi_ut_delete_generic_state(scope_info);
}
}
/****************************************************************************
*
* FUNCTION: acpi_ds_scope_stack_push
*
* PARAMETERS: node - Name to be made current
* type - Type of frame being pushed
* walk_state - Current state
*
* RETURN: Status
*
* DESCRIPTION: Push the current scope on the scope stack, and make the
* passed Node current.
*
***************************************************************************/
acpi_status
acpi_ds_scope_stack_push(struct acpi_namespace_node *node,
acpi_object_type type,
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *scope_info;
union acpi_generic_state *old_scope_info;
ACPI_FUNCTION_TRACE(ds_scope_stack_push);
if (!node) {
/* Invalid scope */
ACPI_ERROR((AE_INFO, "Null scope parameter"));
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Make sure object type is valid */
if (!acpi_ut_valid_object_type(type)) {
ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type));
}
/* Allocate a new scope object */
scope_info = acpi_ut_create_generic_state();
if (!scope_info) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Init new scope object */
scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE;
scope_info->scope.node = node;
scope_info->common.value = (u16) type;
walk_state->scope_depth++;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[%.2d] Pushed scope ",
(u32) walk_state->scope_depth));
old_scope_info = walk_state->scope_info;
if (old_scope_info) {
ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
"[%4.4s] (%s)",
acpi_ut_get_node_name(old_scope_info->
scope.node),
acpi_ut_get_type_name(old_scope_info->
common.value)));
} else {
ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, ACPI_NAMESPACE_ROOT));
}
ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
", New scope -> [%4.4s] (%s)\n",
acpi_ut_get_node_name(scope_info->scope.node),
acpi_ut_get_type_name(scope_info->common.value)));
/* Push new scope object onto stack */
acpi_ut_push_generic_state(&walk_state->scope_info, scope_info);
return_ACPI_STATUS(AE_OK);
}
/****************************************************************************
*
* FUNCTION: acpi_ds_scope_stack_pop
*
* PARAMETERS: walk_state - Current state
*
* RETURN: Status
*
* DESCRIPTION: Pop the scope stack once.
*
***************************************************************************/
acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state)
{
union acpi_generic_state *scope_info;
union acpi_generic_state *new_scope_info;
ACPI_FUNCTION_TRACE(ds_scope_stack_pop);
/*
* Pop scope info object off the stack.
*/
scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info);
if (!scope_info) {
return_ACPI_STATUS(AE_STACK_UNDERFLOW);
}
walk_state->scope_depth--;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[%.2d] Popped scope [%4.4s] (%s), New scope -> ",
(u32) walk_state->scope_depth,
acpi_ut_get_node_name(scope_info->scope.node),
acpi_ut_get_type_name(scope_info->common.value)));
new_scope_info = walk_state->scope_info;
if (new_scope_info) {
ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[%4.4s] (%s)\n",
acpi_ut_get_node_name(new_scope_info->
scope.node),
acpi_ut_get_type_name(new_scope_info->
common.value)));
} else {
ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "%s\n",
ACPI_NAMESPACE_ROOT));
}
acpi_ut_delete_generic_state(scope_info);
return_ACPI_STATUS(AE_OK);
}
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