/drivers/acpi/dispatcher/dswscope.c
https://bitbucket.org/evzijst/gittest · C · 229 lines · 94 code · 48 blank · 87 comment · 9 complexity · 0c3e8a871ce52c11c67f9e5d03969519 MD5 · raw file
- /******************************************************************************
- *
- * Module Name: dswscope - Scope stack manipulation
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000 - 2005, R. Byron Moore
- * 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/acdispat.h>
- #define _COMPONENT ACPI_DISPATCHER
- ACPI_MODULE_NAME ("dswscope")
- #define STACK_POP(head) head
- /****************************************************************************
- *
- * FUNCTION: acpi_ds_scope_stack_clear
- *
- * PARAMETERS: 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
- *
- * 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_REPORT_ERROR (("ds_scope_stack_push: null scope passed\n"));
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
- /* Make sure object type is valid */
- if (!acpi_ut_valid_object_type (type)) {
- ACPI_REPORT_WARNING (("ds_scope_stack_push: Invalid object type: 0x%X\n", 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.data_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: Type - The type of frame to be found
- *
- * DESCRIPTION: Pop the scope stack until a frame of the requested type
- * is found.
- *
- * RETURN: Count of frames popped. If no frame of the requested type
- * was found, the count is returned as a negative number and
- * the scope stack is emptied (which sets the current scope
- * to the root). If the scope stack was empty at entry, the
- * function is a no-op and returns 0.
- *
- ***************************************************************************/
- 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);
- }