exstore.c

linux-2.6.15.6

/******************************************************************************
 *
 * Module Name: exstore - AML Interpreter object store support
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2005, 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>
#include <acpi/acinterp.h>
#include <acpi/amlcode.h>
#include <acpi/acnamesp.h>
#include <acpi/acparser.h>

#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("exstore")

/* Local prototypes */
static void
acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
			u32 level, u32 index);

static acpi_status
acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
			      union acpi_operand_object *dest_desc,
			      struct acpi_walk_state *walk_state);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_do_debug_object
 *
 * PARAMETERS:  source_desc         - Value to be stored
 *              Level               - Indentation level (used for packages)
 *              Index               - Current package element, zero if not pkg
 *
 * RETURN:      None
 *
 * DESCRIPTION: Handles stores to the Debug Object.
 *
 ******************************************************************************/

static void
acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
			u32 level, u32 index)
{
	u32 i;

	ACPI_FUNCTION_TRACE_PTR("ex_do_debug_object", source_desc);

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s",
			      level, " "));

	/* Display index for package output only */

	if (index > 0) {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
				      "(%.2u) ", index - 1));
	}

	if (!source_desc) {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "<Null Object>\n"));
		return_VOID;
	}

	if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: ",
				      acpi_ut_get_object_type_name
				      (source_desc)));

		if (!acpi_ut_valid_internal_object(source_desc)) {
			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
					      "%p, Invalid Internal Object!\n",
					      source_desc));
			return_VOID;
		}
	} else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
		   ACPI_DESC_TYPE_NAMED) {
		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n",
				      acpi_ut_get_type_name(((struct
							      acpi_namespace_node
							      *)source_desc)->
							    type),
				      source_desc));
		return_VOID;
	} else {
		return_VOID;
	}

	switch (ACPI_GET_OBJECT_TYPE(source_desc)) {
	case ACPI_TYPE_INTEGER:

		/* Output correct integer width */

		if (acpi_gbl_integer_byte_width == 4) {
			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n",
					      (u32) source_desc->integer.
					      value));
		} else {
			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
					      "0x%8.8X%8.8X\n",
					      ACPI_FORMAT_UINT64(source_desc->
								 integer.
								 value)));
		}
		break;

	case ACPI_TYPE_BUFFER:

		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n",
				      (u32) source_desc->buffer.length));
		ACPI_DUMP_BUFFER(source_desc->buffer.pointer,
				 (source_desc->buffer.length <
				  32) ? source_desc->buffer.length : 32);
		break;

	case ACPI_TYPE_STRING:

		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n",
				      source_desc->string.length,
				      source_desc->string.pointer));
		break;

	case ACPI_TYPE_PACKAGE:

		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
				      "[0x%.2X Elements]\n",
				      source_desc->package.count));

		/* Output the entire contents of the package */

		for (i = 0; i < source_desc->package.count; i++) {
			acpi_ex_do_debug_object(source_desc->package.
						elements[i], level + 4, i + 1);
		}
		break;

	case ACPI_TYPE_LOCAL_REFERENCE:

		if (source_desc->reference.opcode == AML_INDEX_OP) {
			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
					      "[%s, 0x%X]\n",
					      acpi_ps_get_opcode_name
					      (source_desc->reference.opcode),
					      source_desc->reference.offset));
		} else {
			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s]\n",
					      acpi_ps_get_opcode_name
					      (source_desc->reference.opcode)));
		}

		if (source_desc->reference.object) {
			if (ACPI_GET_DESCRIPTOR_TYPE
			    (source_desc->reference.object) ==
			    ACPI_DESC_TYPE_NAMED) {
				acpi_ex_do_debug_object(((struct
							  acpi_namespace_node *)
							 source_desc->reference.
							 object)->object,
							level + 4, 0);
			} else {
				acpi_ex_do_debug_object(source_desc->reference.
							object, level + 4, 0);
			}
		} else if (source_desc->reference.node) {
			acpi_ex_do_debug_object((source_desc->reference.node)->
						object, level + 4, 0);
		}
		break;

	default:

		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p %s\n",
				      source_desc,
				      acpi_ut_get_object_type_name
				      (source_desc)));
		break;
	}

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
	return_VOID;
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_store
 *
 * PARAMETERS:  *source_desc        - Value to be stored
 *              *dest_desc          - Where to store it.  Must be an NS node
 *                                    or an union acpi_operand_object of type
 *                                    Reference;
 *              walk_state          - Current walk state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Store the value described by source_desc into the location
 *              described by dest_desc. Called by various interpreter
 *              functions to store the result of an operation into
 *              the destination operand -- not just simply the actual "Store"
 *              ASL operator.
 *
 ******************************************************************************/

acpi_status
acpi_ex_store(union acpi_operand_object *source_desc,
	      union acpi_operand_object *dest_desc,
	      struct acpi_walk_state *walk_state)
{
	acpi_status status = AE_OK;
	union acpi_operand_object *ref_desc = dest_desc;

	ACPI_FUNCTION_TRACE_PTR("ex_store", dest_desc);

	/* Validate parameters */

	if (!source_desc || !dest_desc) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Null parameter\n"));
		return_ACPI_STATUS(AE_AML_NO_OPERAND);
	}

	/* dest_desc can be either a namespace node or an ACPI object */

	if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) {
		/*
		 * Dest is a namespace node,
		 * Storing an object into a Named node.
		 */
		status = acpi_ex_store_object_to_node(source_desc,
						      (struct
						       acpi_namespace_node *)
						      dest_desc, walk_state,
						      ACPI_IMPLICIT_CONVERSION);

		return_ACPI_STATUS(status);
	}

	/* Destination object must be a Reference or a Constant object */

	switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
	case ACPI_TYPE_LOCAL_REFERENCE:
		break;

	case ACPI_TYPE_INTEGER:

		/* Allow stores to Constants -- a Noop as per ACPI spec */

		if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
			return_ACPI_STATUS(AE_OK);
		}

		/*lint -fallthrough */

	default:

		/* Destination is not a Reference object */

		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Target is not a Reference or Constant object - %s [%p]\n",
				  acpi_ut_get_object_type_name(dest_desc),
				  dest_desc));

		ACPI_DUMP_STACK_ENTRY(source_desc);
		ACPI_DUMP_STACK_ENTRY(dest_desc);
		ACPI_DUMP_OPERANDS(&dest_desc, ACPI_IMODE_EXECUTE, "ex_store",
				   2,
				   "Target is not a Reference or Constant object");

		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
	}

	/*
	 * Examine the Reference opcode.  These cases are handled:
	 *
	 * 1) Store to Name (Change the object associated with a name)
	 * 2) Store to an indexed area of a Buffer or Package
	 * 3) Store to a Method Local or Arg
	 * 4) Store to the debug object
	 */
	switch (ref_desc->reference.opcode) {
	case AML_NAME_OP:
	case AML_REF_OF_OP:

		/* Storing an object into a Name "container" */

		status = acpi_ex_store_object_to_node(source_desc,
						      ref_desc->reference.
						      object, walk_state,
						      ACPI_IMPLICIT_CONVERSION);
		break;