1 files changed, 551 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exresolv.c b/drivers/acpi/acpica/exresolv.c
new file mode 100644
index 000000000000..42adde01bc93
--- /dev/null
+++ b/drivers/acpi/acpica/exresolv.c
@@ -0,0 +1,551 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresolv - AML Interpreter object resolution
+ *
+ *****************************************************************************/
+
+/*
+ * 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/amlcode.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exresolv")
+
+/* Local prototypes */
+static acpi_status
+acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
+                                struct acpi_walk_state *walk_state);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_to_value
+ *
+ * PARAMETERS:  **stack_ptr         - Points to entry on obj_stack, which can
+ *                                    be either an (union acpi_operand_object *)
+ *                                    or an acpi_handle.
+ *              walk_state          - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert Reference objects to values
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_to_value(union acpi_operand_object **stack_ptr,
+                         struct acpi_walk_state *walk_state)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE_PTR(ex_resolve_to_value, stack_ptr);
+
+        if (!stack_ptr || !*stack_ptr) {
+                ACPI_ERROR((AE_INFO, "Internal - null pointer"));
+                return_ACPI_STATUS(AE_AML_NO_OPERAND);
+        }
+
+        /*
+         * The entity pointed to by the stack_ptr can be either
+         * 1) A valid union acpi_operand_object, or
+         * 2) A struct acpi_namespace_node (named_obj)
+         */
+        if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_OPERAND) {
+                status = acpi_ex_resolve_object_to_value(stack_ptr, walk_state);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+
+                if (!*stack_ptr) {
+                        ACPI_ERROR((AE_INFO, "Internal - null pointer"));
+                        return_ACPI_STATUS(AE_AML_NO_OPERAND);
+                }
+        }
+
+        /*
+         * Object on the stack may have changed if acpi_ex_resolve_object_to_value()
+         * was called (i.e., we can't use an _else_ here.)
+         */
+        if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_NAMED) {
+                status =
+                    acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
+                                                  (struct acpi_namespace_node,
+                                                   stack_ptr), walk_state);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr));
+        return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_object_to_value
+ *
+ * PARAMETERS:  stack_ptr       - Pointer to an internal object
+ *              walk_state      - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Retrieve the value from an internal object. The Reference type
+ *              uses the associated AML opcode to determine the value.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
+                                struct acpi_walk_state *walk_state)
+{
+        acpi_status status = AE_OK;
+        union acpi_operand_object *stack_desc;
+        union acpi_operand_object *obj_desc = NULL;
+        u8 ref_type;
+
+        ACPI_FUNCTION_TRACE(ex_resolve_object_to_value);
+
+        stack_desc = *stack_ptr;
+
+        /* This is an union acpi_operand_object    */
+
+        switch (ACPI_GET_OBJECT_TYPE(stack_desc)) {
+        case ACPI_TYPE_LOCAL_REFERENCE:
+
+                ref_type = stack_desc->reference.class;
+
+                switch (ref_type) {
+                case ACPI_REFCLASS_LOCAL:
+                case ACPI_REFCLASS_ARG:
+
+                        /*
+                         * Get the local from the method's state info
+                         * Note: this increments the local's object reference count
+                         */
+                        status = acpi_ds_method_data_get_value(ref_type,
+                                                               stack_desc->
+                                                               reference.value,
+                                                               walk_state,
+                                                               &obj_desc);
+                        if (ACPI_FAILURE(status)) {
+                                return_ACPI_STATUS(status);
+                        }
+
+                        ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                          "[Arg/Local %X] ValueObj is %p\n",
+                                          stack_desc->reference.value,
+                                          obj_desc));
+
+                        /*
+                         * Now we can delete the original Reference Object and
+                         * replace it with the resolved value
+                         */
+                        acpi_ut_remove_reference(stack_desc);
+                        *stack_ptr = obj_desc;
+                        break;
+
+                case ACPI_REFCLASS_INDEX:
+
+                        switch (stack_desc->reference.target_type) {
+                        case ACPI_TYPE_BUFFER_FIELD:
+
+                                /* Just return - do not dereference */
+                                break;
+
+                        case ACPI_TYPE_PACKAGE:
+
+                                /* If method call or copy_object - do not dereference */
+
+                                if ((walk_state->opcode ==
+                                     AML_INT_METHODCALL_OP)
+                                    || (walk_state->opcode == AML_COPY_OP)) {
+                                        break;
+                                }
+
+                                /* Otherwise, dereference the package_index to a package element */
+
+                                obj_desc = *stack_desc->reference.where;
+                                if (obj_desc) {
+                                        /*
+                                         * Valid object descriptor, copy pointer to return value
+                                         * (i.e., dereference the package index)
+                                         * Delete the ref object, increment the returned object
+                                         */
+                                        acpi_ut_remove_reference(stack_desc);
+                                        acpi_ut_add_reference(obj_desc);
+                                        *stack_ptr = obj_desc;
+                                } else {
+                                        /*
+                                         * A NULL object descriptor means an uninitialized element of
+                                         * the package, can't dereference it
+                                         */
+                                        ACPI_ERROR((AE_INFO,
+                                                    "Attempt to dereference an Index to NULL package element Idx=%p",
+                                                    stack_desc));
+                                        status = AE_AML_UNINITIALIZED_ELEMENT;
+                                }
+                                break;
+
+                        default:
+
+                                /* Invalid reference object */
+
+                                ACPI_ERROR((AE_INFO,
+                                            "Unknown TargetType %X in Index/Reference object %p",
+                                            stack_desc->reference.target_type,
+                                            stack_desc));
+                                status = AE_AML_INTERNAL;
+                                break;
+                        }
+                        break;
+
+                case ACPI_REFCLASS_REFOF:
+                case ACPI_REFCLASS_DEBUG:
+                case ACPI_REFCLASS_TABLE:
+
+                        /* Just leave the object as-is, do not dereference */
+
+                        break;
+
+                case ACPI_REFCLASS_NAME:        /* Reference to a named object */
+
+                        /* Dereference the name */
+
+                        if ((stack_desc->reference.node->type ==
+                             ACPI_TYPE_DEVICE)
+                            || (stack_desc->reference.node->type ==
+                                ACPI_TYPE_THERMAL)) {
+
+                                /* These node types do not have 'real' subobjects */
+
+                                *stack_ptr = (void *)stack_desc->reference.node;
+                        } else {
+                                /* Get the object pointed to by the namespace node */
+
+                                *stack_ptr =
+                                    (stack_desc->reference.node)->object;
+                                acpi_ut_add_reference(*stack_ptr);
+                        }
+
+                        acpi_ut_remove_reference(stack_desc);
+                        break;
+
+                default:
+
+                        ACPI_ERROR((AE_INFO,
+                                    "Unknown Reference type %X in %p", ref_type,
+                                    stack_desc));
+                        status = AE_AML_INTERNAL;
+                        break;
+                }
+                break;
+
+        case ACPI_TYPE_BUFFER:
+
+                status = acpi_ds_get_buffer_arguments(stack_desc);
+                break;
+
+        case ACPI_TYPE_PACKAGE:
+
+                status = acpi_ds_get_package_arguments(stack_desc);
+                break;
+
+        case ACPI_TYPE_BUFFER_FIELD:
+        case ACPI_TYPE_LOCAL_REGION_FIELD:
+        case ACPI_TYPE_LOCAL_BANK_FIELD:
+        case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                  "FieldRead SourceDesc=%p Type=%X\n",
+                                  stack_desc,
+                                  ACPI_GET_OBJECT_TYPE(stack_desc)));
+
+                status =
+                    acpi_ex_read_data_from_field(walk_state, stack_desc,
+                                                 &obj_desc);
+
+                /* Remove a reference to the original operand, then override */
+
+                acpi_ut_remove_reference(*stack_ptr);
+                *stack_ptr = (void *)obj_desc;
+                break;
+
+        default:
+                break;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_multiple
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *              Operand             - Starting point for resolution
+ *              return_type         - Where the object type is returned
+ *              return_desc         - Where the resolved object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the base object and type.  Traverse a reference list if
+ *              necessary to get to the base object.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
+                         union acpi_operand_object *operand,
+                         acpi_object_type * return_type,
+                         union acpi_operand_object **return_desc)
+{
+        union acpi_operand_object *obj_desc = (void *)operand;
+        struct acpi_namespace_node *node;
+        acpi_object_type type;
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_ex_resolve_multiple);
+
+        /* Operand can be either a namespace node or an operand descriptor */
+
+        switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
+        case ACPI_DESC_TYPE_OPERAND:
+                type = obj_desc->common.type;
+                break;
+
+        case ACPI_DESC_TYPE_NAMED:
+                type = ((struct acpi_namespace_node *)obj_desc)->type;
+                obj_desc =
+                    acpi_ns_get_attached_object((struct acpi_namespace_node *)
+                                                obj_desc);
+
+                /* If we had an Alias node, use the attached object for type info */
+
+                if (type == ACPI_TYPE_LOCAL_ALIAS) {
+                        type = ((struct acpi_namespace_node *)obj_desc)->type;
+                        obj_desc =
+                            acpi_ns_get_attached_object((struct
+                                                         acpi_namespace_node *)
+                                                        obj_desc);
+                }
+                break;
+
+        default:
+                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+        }
+
+        /* If type is anything other than a reference, we are done */
+
+        if (type != ACPI_TYPE_LOCAL_REFERENCE) {
+                goto exit;
+        }
+
+        /*
+         * For reference objects created via the ref_of, Index, or Load/load_table
+         * operators, we need to get to the base object (as per the ACPI
+         * specification of the object_type and size_of operators). This means
+         * traversing the list of possibly many nested references.
+         */
+        while (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
+                switch (obj_desc->reference.class) {
+                case ACPI_REFCLASS_REFOF:
+                case ACPI_REFCLASS_NAME:
+
+                        /* Dereference the reference pointer */
+
+                        if (obj_desc->reference.class == ACPI_REFCLASS_REFOF) {
+                                node = obj_desc->reference.object;
+                        } else {        /* AML_INT_NAMEPATH_OP */
+
+                                node = obj_desc->reference.node;
+                        }
+
+                        /* All "References" point to a NS node */
+
+                        if (ACPI_GET_DESCRIPTOR_TYPE(node) !=
+                            ACPI_DESC_TYPE_NAMED) {
+                                ACPI_ERROR((AE_INFO, "Not a NS node %p [%s]",
+                                            node,
+                                            acpi_ut_get_descriptor_name(node)));
+                                return_ACPI_STATUS(AE_AML_INTERNAL);
+                        }
+
+                        /* Get the attached object */
+
+                        obj_desc = acpi_ns_get_attached_object(node);
+                        if (!obj_desc) {
+
+                                /* No object, use the NS node type */
+
+                                type = acpi_ns_get_type(node);
+                                goto exit;
+                        }
+
+                        /* Check for circular references */
+
+                        if (obj_desc == operand) {
+                                return_ACPI_STATUS(AE_AML_CIRCULAR_REFERENCE);
+                        }
+                        break;
+
+                case ACPI_REFCLASS_INDEX:
+
+                        /* Get the type of this reference (index into another object) */
+
+                        type = obj_desc->reference.target_type;
+                        if (type != ACPI_TYPE_PACKAGE) {
+                                goto exit;
+                        }
+
+                        /*
+                         * The main object is a package, we want to get the type
+                         * of the individual package element that is referenced by
+                         * the index.
+                         *
+                         * This could of course in turn be another reference object.
+                         */
+                        obj_desc = *(obj_desc->reference.where);
+                        if (!obj_desc) {
+
+                                /* NULL package elements are allowed */
+
+                                type = 0;       /* Uninitialized */
+                                goto exit;
+                        }
+                        break;
+
+                case ACPI_REFCLASS_TABLE:
+
+                        type = ACPI_TYPE_DDB_HANDLE;
+                        goto exit;
+
+                case ACPI_REFCLASS_LOCAL:
+                case ACPI_REFCLASS_ARG:
+
+                        if (return_desc) {
+                                status =
+                                    acpi_ds_method_data_get_value(obj_desc->
+                                                                  reference.
+                                                                  class,
+                                                                  obj_desc->
+                                                                  reference.
+                                                                  value,
+                                                                  walk_state,
+                                                                  &obj_desc);
+                                if (ACPI_FAILURE(status)) {
+                                        return_ACPI_STATUS(status);
+                                }
+                                acpi_ut_remove_reference(obj_desc);
+                        } else {
+                                status =
+                                    acpi_ds_method_data_get_node(obj_desc->
+                                                                 reference.
+                                                                 class,
+                                                                 obj_desc->
+                                                                 reference.
+                                                                 value,
+                                                                 walk_state,
+                                                                 &node);
+                                if (ACPI_FAILURE(status)) {
+                                        return_ACPI_STATUS(status);
+                                }
+
+                                obj_desc = acpi_ns_get_attached_object(node);
+                                if (!obj_desc) {
+                                        type = ACPI_TYPE_ANY;
+                                        goto exit;
+                                }
+                        }
+                        break;
+
+                case ACPI_REFCLASS_DEBUG:
+
+                        /* The Debug Object is of type "DebugObject" */
+
+                        type = ACPI_TYPE_DEBUG_OBJECT;
+                        goto exit;
+
+                default:
+
+                        ACPI_ERROR((AE_INFO,
+                                    "Unknown Reference Class %2.2X",
+                                    obj_desc->reference.class));
+                        return_ACPI_STATUS(AE_AML_INTERNAL);
+                }
+        }
+
+        /*
+         * Now we are guaranteed to have an object that has not been created
+         * via the ref_of or Index operators.
+         */
+        type = ACPI_GET_OBJECT_TYPE(obj_desc);
+
+      exit:
+        /* Convert internal types to external types */
+
+        switch (type) {
+        case ACPI_TYPE_LOCAL_REGION_FIELD:
+        case ACPI_TYPE_LOCAL_BANK_FIELD:
+        case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+                type = ACPI_TYPE_FIELD_UNIT;
+                break;
+
+        case ACPI_TYPE_LOCAL_SCOPE:
+
+                /* Per ACPI Specification, Scope is untyped */
+
+                type = ACPI_TYPE_ANY;
+                break;
+
+        default:
+                /* No change to Type required */
+                break;
+        }
+
+        *return_type = type;
+        if (return_desc) {
+                *return_desc = obj_desc;
+        }
+        return_ACPI_STATUS(AE_OK);
+}