1 files changed, 304 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exstoren.c b/drivers/acpi/acpica/exstoren.c
new file mode 100644
index 00000000000..ad2047afa46
--- /dev/null
+++ b/drivers/acpi/acpica/exstoren.c
@@ -0,0 +1,304 @@
+
+/******************************************************************************
+ *
+ * Module Name: exstoren - AML Interpreter object store support,
+ *                        Store to Node (namespace object)
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acinterp.h>
+#include <acpi/amlcode.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exstoren")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_object
+ *
+ * PARAMETERS:  source_desc_ptr     - Pointer to the source object
+ *              target_type         - Current type of the target
+ *              walk_state          - Current walk state
+ *
+ * RETURN:      Status, resolved object in source_desc_ptr.
+ *
+ * DESCRIPTION: Resolve an object.  If the object is a reference, dereference
+ *              it and return the actual object in the source_desc_ptr.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,
+                       acpi_object_type target_type,
+                       struct acpi_walk_state *walk_state)
+{
+        union acpi_operand_object *source_desc = *source_desc_ptr;
+        acpi_status status = AE_OK;
+
+        ACPI_FUNCTION_TRACE(ex_resolve_object);
+
+        /* Ensure we have a Target that can be stored to */
+
+        switch (target_type) {
+        case ACPI_TYPE_BUFFER_FIELD:
+        case ACPI_TYPE_LOCAL_REGION_FIELD:
+        case ACPI_TYPE_LOCAL_BANK_FIELD:
+        case ACPI_TYPE_LOCAL_INDEX_FIELD:
+                /*
+                 * These cases all require only Integers or values that
+                 * can be converted to Integers (Strings or Buffers)
+                 */
+
+        case ACPI_TYPE_INTEGER:
+        case ACPI_TYPE_STRING:
+        case ACPI_TYPE_BUFFER:
+
+                /*
+                 * Stores into a Field/Region or into a Integer/Buffer/String
+                 * are all essentially the same.  This case handles the
+                 * "interchangeable" types Integer, String, and Buffer.
+                 */
+                if (ACPI_GET_OBJECT_TYPE(source_desc) ==
+                    ACPI_TYPE_LOCAL_REFERENCE) {
+
+                        /* Resolve a reference object first */
+
+                        status =
+                            acpi_ex_resolve_to_value(source_desc_ptr,
+                                                     walk_state);
+                        if (ACPI_FAILURE(status)) {
+                                break;
+                        }
+                }
+
+                /* For copy_object, no further validation necessary */
+
+                if (walk_state->opcode == AML_COPY_OP) {
+                        break;
+                }
+
+                /* Must have a Integer, Buffer, or String */
+
+                if ((ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_INTEGER) &&
+                    (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_BUFFER) &&
+                    (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_STRING) &&
+                    !((ACPI_GET_OBJECT_TYPE(source_desc) ==
+                       ACPI_TYPE_LOCAL_REFERENCE)
+                      && (source_desc->reference.class ==
+                          ACPI_REFCLASS_TABLE))) {
+
+                        /* Conversion successful but still not a valid type */
+
+                        ACPI_ERROR((AE_INFO,
+                                    "Cannot assign type %s to %s (must be type Int/Str/Buf)",
+                                    acpi_ut_get_object_type_name(source_desc),
+                                    acpi_ut_get_type_name(target_type)));
+                        status = AE_AML_OPERAND_TYPE;
+                }
+                break;
+
+        case ACPI_TYPE_LOCAL_ALIAS:
+        case ACPI_TYPE_LOCAL_METHOD_ALIAS:
+
+                /*
+                 * All aliases should have been resolved earlier, during the
+                 * operand resolution phase.
+                 */
+                ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));
+                status = AE_AML_INTERNAL;
+                break;
+
+        case ACPI_TYPE_PACKAGE:
+        default:
+
+                /*
+                 * All other types than Alias and the various Fields come here,
+                 * including the untyped case - ACPI_TYPE_ANY.
+                 */
+                break;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_store_object_to_object
+ *
+ * PARAMETERS:  source_desc         - Object to store
+ *              dest_desc           - Object to receive a copy of the source
+ *              new_desc            - New object if dest_desc is obsoleted
+ *              walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: "Store" an object to another object.  This may include
+ *              converting the source type to the target type (implicit
+ *              conversion), and a copy of the value of the source to
+ *              the target.
+ *
+ *              The Assignment of an object to another (not named) object
+ *              is handled here.
+ *              The Source passed in will replace the current value (if any)
+ *              with the input value.
+ *
+ *              When storing into an object the data is converted to the
+ *              target object type then stored in the object.  This means
+ *              that the target object type (for an initialized target) will
+ *              not be changed by a store operation.
+ *
+ *              This module allows destination types of Number, String,
+ *              Buffer, and Package.
+ *
+ *              Assumes parameters are already validated.  NOTE: source_desc
+ *              resolution (from a reference object) must be performed by
+ *              the caller if necessary.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_store_object_to_object(union acpi_operand_object *source_desc,
+                               union acpi_operand_object *dest_desc,
+                               union acpi_operand_object **new_desc,
+                               struct acpi_walk_state *walk_state)
+{
+        union acpi_operand_object *actual_src_desc;
+        acpi_status status = AE_OK;
+
+        ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);
+
+        actual_src_desc = source_desc;
+        if (!dest_desc) {
+                /*
+                 * There is no destination object (An uninitialized node or
+                 * package element), so we can simply copy the source object
+                 * creating a new destination object
+                 */
+                status =
+                    acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,
+                                                    walk_state);
+                return_ACPI_STATUS(status);
+        }
+
+        if (ACPI_GET_OBJECT_TYPE(source_desc) !=
+            ACPI_GET_OBJECT_TYPE(dest_desc)) {
+                /*
+                 * The source type does not match the type of the destination.
+                 * Perform the "implicit conversion" of the source to the current type
+                 * of the target as per the ACPI specification.
+                 *
+                 * If no conversion performed, actual_src_desc = source_desc.
+                 * Otherwise, actual_src_desc is a temporary object to hold the
+                 * converted object.
+                 */
+                status =
+                    acpi_ex_convert_to_target_type(ACPI_GET_OBJECT_TYPE
+                                                   (dest_desc), source_desc,
+                                                   &actual_src_desc,
+                                                   walk_state);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+
+                if (source_desc == actual_src_desc) {
+                        /*
+                         * No conversion was performed. Return the source_desc as the
+                         * new object.
+                         */
+                        *new_desc = source_desc;
+                        return_ACPI_STATUS(AE_OK);
+                }
+        }
+
+        /*
+         * We now have two objects of identical types, and we can perform a
+         * copy of the *value* of the source object.
+         */
+        switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
+        case ACPI_TYPE_INTEGER:
+
+                dest_desc->integer.value = actual_src_desc->integer.value;
+
+                /* Truncate value if we are executing from a 32-bit ACPI table */
+
+                acpi_ex_truncate_for32bit_table(dest_desc);
+                break;
+
+        case ACPI_TYPE_STRING:
+
+                status =
+                    acpi_ex_store_string_to_string(actual_src_desc, dest_desc);
+                break;
+
+        case ACPI_TYPE_BUFFER:
+
+                status =
+                    acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);
+                break;
+
+        case ACPI_TYPE_PACKAGE:
+
+                status =
+                    acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,
+                                                    walk_state);
+                break;
+
+        default:
+                /*
+                 * All other types come here.
+                 */
+                ACPI_WARNING((AE_INFO, "Store into type %s not implemented",
+                              acpi_ut_get_object_type_name(dest_desc)));
+
+                status = AE_NOT_IMPLEMENTED;
+                break;
+        }
+
+        if (actual_src_desc != source_desc) {
+
+                /* Delete the intermediate (temporary) source object */
+
+                acpi_ut_remove_reference(actual_src_desc);
+        }
+
+        *new_desc = dest_desc;
+        return_ACPI_STATUS(status);
+}