/****************************************************************************** * * Module Name: dswscope - Scope stack manipulation * *****************************************************************************/ /* * Copyright (C) 2000 - 2007, 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") /**************************************************************************** * * 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); }