| /****************************************************************************** |
| * |
| * Module Name: dswscope - Scope stack manipulation |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2008, Intel Corp. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions, and the following disclaimer, |
| * without modification. |
| * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| * substantially similar to the "NO WARRANTY" disclaimer below |
| * ("Disclaimer") and any redistribution must be conditioned upon |
| * including a substantially similar Disclaimer requirement for further |
| * binary redistribution. |
| * 3. Neither the names of the above-listed copyright holders nor the names |
| * of any contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * NO WARRANTY |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGES. |
| */ |
| |
| #include <acpi/acpi.h> |
| #include <acpi/accommon.h> |
| #include <acpi/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, "[\\___] (%s)", "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, "[\\___] (ROOT)\n")); |
| } |
| |
| acpi_ut_delete_generic_state(scope_info); |
| return_ACPI_STATUS(AE_OK); |
| } |