* String found - the string references a named object and must be * resolved to a node
* String found - the string references a named object and * must be resolved to a node
acpi_ex_resolve_operands (	u16                             opcode,	union acpi_operand_object       **stack_ptr,	struct acpi_walk_state          *walk_state){	union acpi_operand_object       *obj_desc;	acpi_status                     status = AE_OK;	u8                              object_type;	void                            *temp_node;	u32                             arg_types;	const struct acpi_opcode_info   *op_info;	u32                             this_arg_type;	acpi_object_type                type_needed;	ACPI_FUNCTION_TRACE_U32 ("ex_resolve_operands", opcode);	op_info = acpi_ps_get_opcode_info (opcode);	if (op_info->class == AML_CLASS_UNKNOWN) {		return_ACPI_STATUS (AE_AML_BAD_OPCODE);	}	arg_types = op_info->runtime_args;	if (arg_types == ARGI_INVALID_OPCODE) {		ACPI_REPORT_ERROR (("resolve_operands: %X is not a valid AML opcode\n",			opcode));		return_ACPI_STATUS (AE_AML_INTERNAL);	}	ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Opcode %X [%s] required_operand_types=%8.8X \n",		opcode, op_info->name, arg_types));	/*	 * Normal exit is with (arg_types == 0) at end of argument list.	 * Function will return an exception from within the loop upon	 * finding an entry which is not (or cannot be converted	 * to) the required type; if stack underflows; or upon	 * finding a NULL stack entry (which should not happen).	 */	while (GET_CURRENT_ARG_TYPE (arg_types)) {		if (!stack_ptr || !*stack_ptr) {			ACPI_REPORT_ERROR (("resolve_operands: Null stack entry at %p\n",				stack_ptr));			return_ACPI_STATUS (AE_AML_INTERNAL);		}		/* Extract useful items */		obj_desc = *stack_ptr;		/* Decode the descriptor type */		switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) {		case ACPI_DESC_TYPE_NAMED:			/* Node */			object_type = ((struct acpi_namespace_node *) obj_desc)->type;			break;		case ACPI_DESC_TYPE_OPERAND:			/* ACPI internal object */			object_type = ACPI_GET_OBJECT_TYPE (obj_desc);			/* Check for bad acpi_object_type */			if (!acpi_ut_valid_object_type (object_type)) {				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad operand object type [%X]\n",					object_type));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {				/*				 * Decode the Reference				 */				op_info = acpi_ps_get_opcode_info (opcode);				if (op_info->class == AML_CLASS_UNKNOWN) {					return_ACPI_STATUS (AE_AML_BAD_OPCODE);				}				switch (obj_desc->reference.opcode) {				case AML_DEBUG_OP:				case AML_NAME_OP:				case AML_INDEX_OP:				case AML_REF_OF_OP:				case AML_ARG_OP:				case AML_LOCAL_OP:				case AML_LOAD_OP:   /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */					ACPI_DEBUG_ONLY_MEMBERS (ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,						"Operand is a Reference, ref_opcode [%s]\n",						(acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name)));					break;				default:					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,						"Operand is a Reference, Unknown Reference Opcode %X [%s]\n",						obj_desc->reference.opcode,						(acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name));					return_ACPI_STATUS (AE_AML_OPERAND_TYPE);				}			}			break;		default:			/* Invalid descriptor */			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Invalid descriptor %p [%s]\n",					obj_desc, acpi_ut_get_descriptor_name (obj_desc)));			return_ACPI_STATUS (AE_AML_OPERAND_TYPE);		}		/*		 * Get one argument type, point to the next		 */		this_arg_type = GET_CURRENT_ARG_TYPE (arg_types);		INCREMENT_ARG_LIST (arg_types);		/*		 * Handle cases where the object does not need to be		 * resolved to a value		 */		switch (this_arg_type) {		case ARGI_REF_OR_STRING:        /* Can be a String or Reference */			if ((ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_OPERAND) &&				(ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_STRING)) {				/*				 * String found - the string references a named object and must be				 * resolved to a node				 */				goto next_operand;			}			/* Else not a string - fall through to the normal Reference case below */			/*lint -fallthrough */		case ARGI_REFERENCE:            /* References: */		case ARGI_INTEGER_REF:		case ARGI_OBJECT_REF:		case ARGI_DEVICE_REF:		case ARGI_TARGETREF:            /* Allows implicit conversion rules before store */		case ARGI_FIXED_TARGET:         /* No implicit conversion before store to target */		case ARGI_SIMPLE_TARGET:        /* Name, Local, or Arg - no implicit conversion  */			/* Need an operand of type ACPI_TYPE_LOCAL_REFERENCE */			if (ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_NAMED) /* Node (name) ptr OK as-is */ {				goto next_operand;			}			status = acpi_ex_check_object_type (ACPI_TYPE_LOCAL_REFERENCE,					  object_type, obj_desc);			if (ACPI_FAILURE (status)) {				return_ACPI_STATUS (status);			}			if (AML_NAME_OP == obj_desc->reference.opcode) {				/*				 * Convert an indirect name ptr to direct name ptr and put				 * it on the stack				 */				temp_node = obj_desc->reference.object;				acpi_ut_remove_reference (obj_desc);				(*stack_ptr) = temp_node;			}			goto next_operand;		case ARGI_DATAREFOBJ:  /* Store operator only */			/*			 * We don't want to resolve index_op reference objects during			 * a store because this would be an implicit de_ref_of operation.			 * Instead, we just want to store the reference object.			 * -- All others must be resolved below.			 */			if ((opcode == AML_STORE_OP) &&				(ACPI_GET_OBJECT_TYPE (*stack_ptr) == ACPI_TYPE_LOCAL_REFERENCE) &&				((*stack_ptr)->reference.opcode == AML_INDEX_OP)) {				goto next_operand;			}			break;		default:			/* All cases covered above */			break;		}		/*		 * Resolve this object to a value		 */		status = acpi_ex_resolve_to_value (stack_ptr, walk_state);		if (ACPI_FAILURE (status)) {			return_ACPI_STATUS (status);		}		/* Get the resolved object */		obj_desc = *stack_ptr;		/*		 * Check the resulting object (value) type		 */		switch (this_arg_type) {		/*		 * For the simple cases, only one type of resolved object		 * is allowed		 */		case ARGI_MUTEX:			/* Need an operand of type ACPI_TYPE_MUTEX */			type_needed = ACPI_TYPE_MUTEX;			break;		case ARGI_EVENT:			/* Need an operand of type ACPI_TYPE_EVENT */			type_needed = ACPI_TYPE_EVENT;			break;		case ARGI_PACKAGE:   /* Package */			/* Need an operand of type ACPI_TYPE_PACKAGE */			type_needed = ACPI_TYPE_PACKAGE;			break;		case ARGI_ANYTYPE:			/* Any operand type will do */			type_needed = ACPI_TYPE_ANY;			break;		case ARGI_DDBHANDLE:			/* Need an operand of type ACPI_TYPE_DDB_HANDLE */			type_needed = ACPI_TYPE_LOCAL_REFERENCE;			break;		/*		 * The more complex cases allow multiple resolved object types		 */		case ARGI_INTEGER:   /* Number */			/*			 * Need an operand of type ACPI_TYPE_INTEGER,			 * But we can implicitly convert from a STRING or BUFFER			 * Aka - "Implicit Source Operand Conversion"			 */			status = acpi_ex_convert_to_integer (obj_desc, stack_ptr, 16);			if (ACPI_FAILURE (status)) {				if (status == AE_TYPE) {					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,						"Needed [Integer/String/Buffer], found [%s] %p\n",						acpi_ut_get_object_type_name (obj_desc), obj_desc));					return_ACPI_STATUS (AE_AML_OPERAND_TYPE);				}				return_ACPI_STATUS (status);			}			goto next_operand;		case ARGI_BUFFER:			/*			 * Need an operand of type ACPI_TYPE_BUFFER,			 * But we can implicitly convert from a STRING or INTEGER			 * Aka - "Implicit Source Operand Conversion"			 */			status = acpi_ex_convert_to_buffer (obj_desc, stack_ptr);			if (ACPI_FAILURE (status)) {				if (status == AE_TYPE) {					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,						"Needed [Integer/String/Buffer], found [%s] %p\n",						acpi_ut_get_object_type_name (obj_desc), obj_desc));					return_ACPI_STATUS (AE_AML_OPERAND_TYPE);				}				return_ACPI_STATUS (status);			}			goto next_operand;		case ARGI_STRING:			/*			 * Need an operand of type ACPI_TYPE_STRING,			 * But we can implicitly convert from a BUFFER or INTEGER			 * Aka - "Implicit Source Operand Conversion"			 */			status = acpi_ex_convert_to_string (obj_desc, stack_ptr,					 ACPI_IMPLICIT_CONVERT_HEX);			if (ACPI_FAILURE (status)) {				if (status == AE_TYPE) {					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,						"Needed [Integer/String/Buffer], found [%s] %p\n",						acpi_ut_get_object_type_name (obj_desc), obj_desc));					return_ACPI_STATUS (AE_AML_OPERAND_TYPE);				}				return_ACPI_STATUS (status);			}			goto next_operand;		case ARGI_COMPUTEDATA:			/* Need an operand of type INTEGER, STRING or BUFFER */			switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {			case ACPI_TYPE_INTEGER:			case ACPI_TYPE_STRING:			case ACPI_TYPE_BUFFER:				/* Valid operand */			   break;			default:				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Needed [Integer/String/Buffer], found [%s] %p\n",					acpi_ut_get_object_type_name (obj_desc), obj_desc));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			goto next_operand;		case ARGI_BUFFER_OR_STRING:			/* Need an operand of type STRING or BUFFER */			switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {			case ACPI_TYPE_STRING:			case ACPI_TYPE_BUFFER:				/* Valid operand */			   break;			case ACPI_TYPE_INTEGER:				/* Highest priority conversion is to type Buffer */				status = acpi_ex_convert_to_buffer (obj_desc, stack_ptr);				if (ACPI_FAILURE (status)) {					return_ACPI_STATUS (status);				}				break;			default:				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Needed [Integer/String/Buffer], found [%s] %p\n",					acpi_ut_get_object_type_name (obj_desc), obj_desc));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			goto next_operand;		case ARGI_DATAOBJECT:			/*			 * ARGI_DATAOBJECT is only used by the size_of operator.			 * Need a buffer, string, package, or ref_of reference.			 *			 * The only reference allowed here is a direct reference to			 * a namespace node.			 */			switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {			case ACPI_TYPE_PACKAGE:			case ACPI_TYPE_STRING:			case ACPI_TYPE_BUFFER:			case ACPI_TYPE_LOCAL_REFERENCE:				/* Valid operand */				break;			default:				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Needed [Buffer/String/Package/Reference], found [%s] %p\n",					acpi_ut_get_object_type_name (obj_desc), obj_desc));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			goto next_operand;		case ARGI_COMPLEXOBJ:			/* Need a buffer or package or (ACPI 2.0) String */			switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {			case ACPI_TYPE_PACKAGE:			case ACPI_TYPE_STRING:			case ACPI_TYPE_BUFFER:				/* Valid operand */				break;			default:				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Needed [Buffer/String/Package], found [%s] %p\n",					acpi_ut_get_object_type_name (obj_desc), obj_desc));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			goto next_operand;		case ARGI_REGION_OR_FIELD:			/* Need an operand of type ACPI_TYPE_REGION or a FIELD in a region */			switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {			case ACPI_TYPE_REGION:			case ACPI_TYPE_LOCAL_REGION_FIELD:			case ACPI_TYPE_LOCAL_BANK_FIELD:			case ACPI_TYPE_LOCAL_INDEX_FIELD:				/* Valid operand */				break;			default:				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Needed [Region/region_field], found [%s] %p\n",					acpi_ut_get_object_type_name (obj_desc), obj_desc));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			goto next_operand;		case ARGI_DATAREFOBJ:			/* Used by the Store() operator only */			switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {			case ACPI_TYPE_INTEGER:			case ACPI_TYPE_PACKAGE:			case ACPI_TYPE_STRING:			case ACPI_TYPE_BUFFER:			case ACPI_TYPE_BUFFER_FIELD:			case ACPI_TYPE_LOCAL_REFERENCE:			case ACPI_TYPE_LOCAL_REGION_FIELD:			case ACPI_TYPE_LOCAL_BANK_FIELD:			case ACPI_TYPE_LOCAL_INDEX_FIELD:			case ACPI_TYPE_DDB_HANDLE:				/* Valid operand */				break;			default:				if (acpi_gbl_enable_interpreter_slack) {					/*					 * Enable original behavior of Store(), allowing any and all					 * objects as the source operand.  The ACPI spec does not					 * allow this, however.					 */					break;				}				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,					"Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n",					acpi_ut_get_object_type_name (obj_desc), obj_desc));				return_ACPI_STATUS (AE_AML_OPERAND_TYPE);			}			goto next_operand;		default:			/* Unknown type */			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,				"Internal - Unknown ARGI (required operand) type %X\n",				this_arg_type));			return_ACPI_STATUS (AE_BAD_PARAMETER);		}		/*		 * Make sure that the original object was resolved to the		 * required object type (Simple cases only).		 */		status = acpi_ex_check_object_type (type_needed,				  ACPI_GET_OBJECT_TYPE (*stack_ptr), *stack_ptr);		if (ACPI_FAILURE (status)) {			return_ACPI_STATUS (status);		}next_operand:		/*		 * If more operands needed, decrement stack_ptr to point		 * to next operand on stack		 */		if (GET_CURRENT_ARG_TYPE (arg_types)) {			stack_ptr--;		}	}   /* while (*Types) */	return_ACPI_STATUS (status);}