exstore.c

h内核

/******************************************************************************
 *
 * 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>


#define _COMPONENT          ACPI_EXECUTER
	 ACPI_MODULE_NAME    ("exstore")


/*******************************************************************************
 *
 * 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;


	case AML_INDEX_OP:

		/* Storing to an Index (pointer into a packager or buffer) */

		status = acpi_ex_store_object_to_index (source_desc, ref_desc, walk_state);
		break;


	case AML_LOCAL_OP:
	case AML_ARG_OP:

		/* Store to a method local/arg  */

		status = acpi_ds_store_object_to_local (ref_desc->reference.opcode,
				  ref_desc->reference.offset, source_desc, walk_state);
		break;


	case AML_DEBUG_OP:

		/*
		 * Storing to the Debug object causes the value stored to be
		 * displayed and otherwise has no effect -- see ACPI Specification
		 */
		ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
			"**** Write to Debug Object: Object %p %s ****:\n\n",
			source_desc, acpi_ut_get_object_type_name (source_desc)));

		ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %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));
		   break;
		}

		switch (ACPI_GET_OBJECT_TYPE (source_desc)) {
		case ACPI_TYPE_INTEGER:

			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]",
				(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 Ptr - %p\n",
				source_desc->package.count, source_desc->package.elements));
			break;


		default:

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

		ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, "\n"));
		break;


	default:

		ACPI_REPORT_ERROR (("ex_store: Unknown Reference opcode %X\n",
			ref_desc->reference.opcode));
		ACPI_DUMP_ENTRY (ref_desc, ACPI_LV_ERROR);

		status = AE_AML_INTERNAL;
		break;
	}

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_store_object_to_index
 *
 * PARAMETERS:  *source_desc            - Value to be stored
 *              *dest_desc              - Named object to receive the value
 *              walk_state              - Current walk state
 *
 * RETURN:      Status