dswload.c

h内核

			/* For Namepath op, get the path string */

			buffer_ptr = op->common.value.string;
			if (!buffer_ptr) {
				/* No name, just exit */

				return_ACPI_STATUS (AE_OK);
			}
		}
		else {
			/* Get name from the op */

			buffer_ptr = (char *) &op->named.name;
		}
	}
	else {
		/* Get the namestring from the raw AML */

		buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
	}

	/* Map the opcode into an internal object type */

	object_type = walk_state->op_info->object_type;

	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
		"State=%p Op=%p Type=%X\n", walk_state, op, object_type));


	switch (walk_state->opcode) {
	case AML_FIELD_OP:
	case AML_BANK_FIELD_OP:
	case AML_INDEX_FIELD_OP:

		node = NULL;
		status = AE_OK;
		break;

	case AML_INT_NAMEPATH_OP:

		/*
		 * The name_path is an object reference to an existing object. Don't enter the
		 * name into the namespace, but look it up for use later
		 */
		status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
				  ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
		break;

	case AML_SCOPE_OP:

		/*
		 * The Path is an object reference to an existing object.  Don't enter the
		 * name into the namespace, but look it up for use later
		 */
		status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
				  ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
		if (ACPI_FAILURE (status)) {
#ifdef _ACPI_ASL_COMPILER
			if (status == AE_NOT_FOUND) {
				status = AE_OK;
			}
			else {
				ACPI_REPORT_NSERROR (buffer_ptr, status);
			}
#else
			ACPI_REPORT_NSERROR (buffer_ptr, status);
#endif
			return_ACPI_STATUS (status);
		}
		/*
		 * We must check to make sure that the target is
		 * one of the opcodes that actually opens a scope
		 */
		switch (node->type) {
		case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
		case ACPI_TYPE_DEVICE:
		case ACPI_TYPE_POWER:
		case ACPI_TYPE_PROCESSOR:
		case ACPI_TYPE_THERMAL:

			/* These are acceptable types */
			break;

		case ACPI_TYPE_INTEGER:
		case ACPI_TYPE_STRING:
		case ACPI_TYPE_BUFFER:

			/*
			 * These types we will allow, but we will change the type.  This
			 * enables some existing code of the form:
			 *
			 *  Name (DEB, 0)
			 *  Scope (DEB) { ... }
			 */

			ACPI_REPORT_WARNING (("Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
				buffer_ptr, acpi_ut_get_type_name (node->type)));

			node->type = ACPI_TYPE_ANY;
			walk_state->scope_info->common.value = ACPI_TYPE_ANY;
			break;

		default:

			/* All other types are an error */

			ACPI_REPORT_ERROR (("Invalid type (%s) for target of Scope operator [%4.4s]\n",
				acpi_ut_get_type_name (node->type), buffer_ptr));

			return (AE_AML_OPERAND_TYPE);
		}
		break;

	default:

		/* All other opcodes */

		if (op && op->common.node) {
			/* This op/node was previously entered into the namespace */

			node = op->common.node;

			if (acpi_ns_opens_scope (object_type)) {
				status = acpi_ds_scope_stack_push (node, object_type, walk_state);
				if (ACPI_FAILURE (status)) {
					return_ACPI_STATUS (status);
				}

			}
			return_ACPI_STATUS (AE_OK);
		}

		/*
		 * Enter the named type into the internal namespace.  We enter the name
		 * as we go downward in the parse tree.  Any necessary subobjects that involve
		 * arguments to the opcode must be created as we go back up the parse tree later.
		 *
		 * Note: Name may already exist if we are executing a deferred opcode.
		 */
		if (walk_state->deferred_node) {
			/* This name is already in the namespace, get the node */

			node = walk_state->deferred_node;
			status = AE_OK;
			break;
		}

		status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
				  ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, walk_state, &(node));
		break;
	}

	if (ACPI_FAILURE (status)) {
		ACPI_REPORT_NSERROR (buffer_ptr, status);
		return_ACPI_STATUS (status);
	}


	if (!op) {
		/* Create a new op */

		op = acpi_ps_alloc_op (walk_state->opcode);
		if (!op) {
			return_ACPI_STATUS (AE_NO_MEMORY);
		}

		/* Initialize the new op */

		if (node) {
			op->named.name = node->name.integer;
		}
		if (out_op) {
			*out_op = op;
		}
	}

	/*
	 * Put the Node in the "op" object that the parser uses, so we
	 * can get it again quickly when this scope is closed
	 */
	op->common.node = node;

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load2_end_op
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *              Op              - Op that has been just been completed in the
 *                                walk;  Arguments have now been evaluated.
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Ascending callback used during the loading of the namespace,
 *              both control methods and everything else.
 *
 ******************************************************************************/

acpi_status
acpi_ds_load2_end_op (
	struct acpi_walk_state          *walk_state)
{
	union acpi_parse_object         *op;
	acpi_status                     status = AE_OK;
	acpi_object_type                object_type;
	struct acpi_namespace_node      *node;
	union acpi_parse_object         *arg;
	struct acpi_namespace_node      *new_node;
#ifndef ACPI_NO_METHOD_EXECUTION
	u32                             i;
#endif


	ACPI_FUNCTION_TRACE ("ds_load2_end_op");

	op = walk_state->op;
	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
			walk_state->op_info->name, op, walk_state));

	/* Only interested in opcodes that have namespace objects */

	if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
		return_ACPI_STATUS (AE_OK);
	}

	if (op->common.aml_opcode == AML_SCOPE_OP) {
		ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
			"Ending scope Op=%p State=%p\n", op, walk_state));
	}


	object_type = walk_state->op_info->object_type;

	/*
	 * Get the Node/name from the earlier lookup
	 * (It was saved in the *op structure)
	 */
	node = op->common.node;

	/*
	 * Put the Node on the object stack (Contains the ACPI Name of
	 * this object)
	 */
	walk_state->operands[0] = (void *) node;
	walk_state->num_operands = 1;

	/* Pop the scope stack */

	if (acpi_ns_opens_scope (object_type) && (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
		ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
			acpi_ut_get_type_name (object_type), op));

		status = acpi_ds_scope_stack_pop (walk_state);
		if (ACPI_FAILURE (status)) {
			goto cleanup;
		}
	}

	/*
	 * Named operations are as follows:
	 *
	 * AML_ALIAS
	 * AML_BANKFIELD
	 * AML_CREATEBITFIELD
	 * AML_CREATEBYTEFIELD
	 * AML_CREATEDWORDFIELD
	 * AML_CREATEFIELD
	 * AML_CREATEQWORDFIELD
	 * AML_CREATEWORDFIELD
	 * AML_DATA_REGION
	 * AML_DEVICE
	 * AML_EVENT
	 * AML_FIELD
	 * AML_INDEXFIELD
	 * AML_METHOD
	 * AML_METHODCALL
	 * AML_MUTEX
	 * AML_NAME
	 * AML_NAMEDFIELD
	 * AML_OPREGION
	 * AML_POWERRES
	 * AML_PROCESSOR
	 * AML_SCOPE
	 * AML_THERMALZONE
	 */

	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
		"Create-Load [%s] State=%p Op=%p named_obj=%p\n",
		acpi_ps_get_opcode_name (op->common.aml_opcode), walk_state, op, node));

	/* Decode the opcode */

	arg = op->common.value.arg;

	switch (walk_state->op_info->type) {
#ifndef ACPI_NO_METHOD_EXECUTION

	case AML_TYPE_CREATE_FIELD:

		/*
		 * Create the field object, but the field buffer and index must
		 * be evaluated later during the execution phase
		 */
		status = acpi_ds_create_buffer_field (op, walk_state);
		break;


	 case AML_TYPE_NAMED_FIELD:

		switch (op->common.aml_opcode) {
		case AML_INDEX_FIELD_OP:

			status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
					   walk_state);
			break;

		case AML_BANK_FIELD_OP:

			status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
			break;

		case AML_FIELD_OP:

			status = acpi_ds_create_field (op, arg->common.node, walk_state);
			break;

		default:
			/* All NAMED_FIELD opcodes must be handled above */
			break;
		}
		break;


	 case AML_TYPE_NAMED_SIMPLE:

		status = acpi_ds_create_operands (walk_state, arg);
		if (ACPI_FAILURE (status)) {
			goto cleanup;
		}

		switch (op->common.aml_opcode) {
		case AML_PROCESSOR_OP:

			status = acpi_ex_create_processor (walk_state);
			break;

		case AML_POWER_RES_OP:

			status = acpi_ex_create_power_resource (walk_state);
			break;

		case AML_MUTEX_OP:

			status = acpi_ex_create_mutex (walk_state);
			break;

		case AML_EVENT_OP:

			status = acpi_ex_create_event (walk_state);
			break;

		case AML_DATA_REGION_OP:

			status = acpi_ex_create_table_region (walk_state);
			break;

		case AML_ALIAS_OP:

			status = acpi_ex_create_alias (walk_state);
			break;

		default:
			/* Unknown opcode */

			status = AE_OK;
			goto cleanup;
		}

		/* Delete operands */

		for (i = 1; i < walk_state->num_operands; i++) {
			acpi_ut_remove_reference (walk_state->operands[i]);
			walk_state->operands[i] = NULL;
		}

		break;
#endif /* ACPI_NO_METHOD_EXECUTION */

	case AML_TYPE_NAMED_COMPLEX:

		switch (op->common.aml_opcode) {
#ifndef ACPI_NO_METHOD_EXECUTION
		case AML_REGION_OP:
			/*
			 * The op_region is not fully parsed at this time. Only valid argument is the space_id.
			 * (We must save the address of the AML of the address and length operands)
			 */
			/*
			 * If we have a valid region, initialize it
			 * Namespace is NOT locked at this point.
			 */
			status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node), FALSE);
			if (ACPI_FAILURE (status)) {
				/*
				 *  If AE_NOT_EXIST is returned, it is not fatal
				 *  because many regions get created before a handler
				 *  is installed for said region.
				 */
				if (AE_NOT_EXIST == status) {
					status = AE_OK;
				}
			}
			break;


		case AML_NAME_OP:

			status = acpi_ds_create_node (walk_state, node, op);
			break;
#endif /* ACPI_NO_METHOD_EXECUTION */


		default:
			/* All NAMED_COMPLEX opcodes must be handled above */
			/* Note: Method objects were already created in Pass 1 */
			break;
		}
		break;


	case AML_CLASS_INTERNAL:

		/* case AML_INT_NAMEPATH_OP: */
		break;


	case AML_CLASS_METHOD_CALL:

		ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
			"RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
			walk_state, op, node));

		/*
		 * Lookup the method name and save the Node
		 */
		status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
				  ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
				  ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
				  walk_state, &(new_node));
		if (ACPI_SUCCESS (status)) {
			/*
			 * Make sure that what we found is indeed a method
			 * We didn't search for a method on purpose, to see if the name would resolve
			 */
			if (new_node->type != ACPI_TYPE_METHOD) {
				status = AE_AML_OPERAND_TYPE;
			}

			/* We could put the returned object (Node) on the object stack for later, but
			 * for now, we will put it in the "op" object that the parser uses, so we
			 * can get it again at the end of this scope
			 */
			op->common.node = new_node;
		}
		else {
			ACPI_REPORT_NSERROR (arg->common.value.string, status);
		}
		break;


	default:
		break;
	}

cleanup:

	/* Remove the Node pushed at the very beginning */

	walk_state->operands[0] = NULL;
	walk_state->num_operands = 0;
	return_ACPI_STATUS (status);
}