Merge branch 'linus' into x86/cleanups

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..145d15305f7
--- /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 "accommon.h"
+#include "acinterp.h"
+#include "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);
+}