214 lines
6.6 KiB
C
214 lines
6.6 KiB
C
/******************************************************************************
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*
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* Module Name: dswscope - Scope stack manipulation
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2007, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acdispat.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dswscope")
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/****************************************************************************
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*
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* FUNCTION: acpi_ds_scope_stack_clear
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*
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* PARAMETERS: walk_state - Current state
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*
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* RETURN: None
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*
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* DESCRIPTION: Pop (and free) everything on the scope stack except the
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* root scope object (which remains at the stack top.)
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*
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***************************************************************************/
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void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *scope_info;
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ACPI_FUNCTION_NAME(ds_scope_stack_clear);
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while (walk_state->scope_info) {
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/* Pop a scope off the stack */
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scope_info = walk_state->scope_info;
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walk_state->scope_info = scope_info->scope.next;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Popped object type (%s)\n",
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acpi_ut_get_type_name(scope_info->common.
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value)));
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acpi_ut_delete_generic_state(scope_info);
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}
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}
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/****************************************************************************
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*
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* FUNCTION: acpi_ds_scope_stack_push
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*
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* PARAMETERS: Node - Name to be made current
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* Type - Type of frame being pushed
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push the current scope on the scope stack, and make the
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* passed Node current.
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*
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***************************************************************************/
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acpi_status
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acpi_ds_scope_stack_push(struct acpi_namespace_node *node,
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acpi_object_type type,
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *scope_info;
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union acpi_generic_state *old_scope_info;
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ACPI_FUNCTION_TRACE(ds_scope_stack_push);
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if (!node) {
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/* Invalid scope */
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ACPI_ERROR((AE_INFO, "Null scope parameter"));
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Make sure object type is valid */
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if (!acpi_ut_valid_object_type(type)) {
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ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type));
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}
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/* Allocate a new scope object */
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scope_info = acpi_ut_create_generic_state();
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if (!scope_info) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Init new scope object */
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scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE;
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scope_info->scope.node = node;
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scope_info->common.value = (u16) type;
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walk_state->scope_depth++;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[%.2d] Pushed scope ",
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(u32) walk_state->scope_depth));
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old_scope_info = walk_state->scope_info;
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if (old_scope_info) {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
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"[%4.4s] (%s)",
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acpi_ut_get_node_name(old_scope_info->
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scope.node),
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acpi_ut_get_type_name(old_scope_info->
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common.value)));
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} else {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT"));
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
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", New scope -> [%4.4s] (%s)\n",
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acpi_ut_get_node_name(scope_info->scope.node),
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acpi_ut_get_type_name(scope_info->common.value)));
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/* Push new scope object onto stack */
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acpi_ut_push_generic_state(&walk_state->scope_info, scope_info);
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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_ds_scope_stack_pop
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*
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* PARAMETERS: walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop the scope stack once.
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*
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***************************************************************************/
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acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *scope_info;
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union acpi_generic_state *new_scope_info;
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ACPI_FUNCTION_TRACE(ds_scope_stack_pop);
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/*
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* Pop scope info object off the stack.
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*/
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scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info);
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if (!scope_info) {
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return_ACPI_STATUS(AE_STACK_UNDERFLOW);
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}
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walk_state->scope_depth--;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[%.2d] Popped scope [%4.4s] (%s), New scope -> ",
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(u32) walk_state->scope_depth,
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acpi_ut_get_node_name(scope_info->scope.node),
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acpi_ut_get_type_name(scope_info->common.value)));
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new_scope_info = walk_state->scope_info;
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if (new_scope_info) {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC,
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"[%4.4s] (%s)\n",
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acpi_ut_get_node_name(new_scope_info->
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scope.node),
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acpi_ut_get_type_name(new_scope_info->
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common.value)));
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} else {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n"));
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}
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acpi_ut_delete_generic_state(scope_info);
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return_ACPI_STATUS(AE_OK);
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}
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