--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: dswscope - Scope stack manipulation
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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 "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, "[\\___] (%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);
+}
Code Review / kvmfornfv.git / blobdiff