dswload.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

					return (status);
				}

			}
			return (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.
		 */
		status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, data_type,
				  IMODE_EXECUTE, NS_NO_UPSEARCH, walk_state, &(node));
	}

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

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

			/* Initialize */

			((acpi_parse2_object *)op)->name = node->name;
			*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->node = node;

		if (original) {
			ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "old %p new %p\n", original, node));

			if (original != node) {
				ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
					"Lookup match error: old %p new %p\n", original, node));
			}
		}
	}

	return (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 (
	acpi_walk_state         *walk_state)
{
	acpi_parse_object       *op;
	acpi_status             status = AE_OK;
	acpi_object_type8       data_type;
	acpi_namespace_node     *node;
	acpi_parse_object       *arg;
	acpi_namespace_node     *new_node;
	u32                     i;


	PROC_NAME ("Ds_load2_end_op");

	op = walk_state->op;
	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));


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

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

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

		if (((acpi_parse2_object *)op)->name == -1) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unnamed scope! Op=%p State=%p\n",
				op, walk_state));
			return (AE_OK);
		}
	}


	data_type = acpi_ds_map_named_opcode_to_data_type (op->opcode);

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

		ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
			acpi_ut_get_type_name (data_type), op));
		acpi_ds_scope_stack_pop (walk_state);
	}

	/*
	 * 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->opcode), walk_state, op, node));

	/* Decode the opcode */

	arg = op->value.arg;

	switch (walk_state->op_info->type) {
	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:

		arg = op->value.arg;
		switch (op->opcode) {
		case AML_INDEX_FIELD_OP:

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


		case AML_BANK_FIELD_OP:

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


		case AML_FIELD_OP:

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


	 case AML_TYPE_NAMED_SIMPLE:

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

		switch (op->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;
			break;
		}

		/* 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;


	case AML_TYPE_NAMED_COMPLEX:

		switch (op->opcode) {
		case AML_METHOD_OP:
			/*
			 * Method_op Pkg_length Names_string Method_flags Term_list
			 */
			ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
				"LOADING-Method: State=%p Op=%p Named_obj=%p\n",
				walk_state, op, node));

			if (!node->object) {
				status = acpi_ds_create_operands (walk_state, arg);
				if (ACPI_FAILURE (status)) {
					goto cleanup;
				}

				status = acpi_ex_create_method (((acpi_parse2_object *) op)->data,
						   ((acpi_parse2_object *) op)->length,
						   walk_state);
			}
			break;


		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)
			 */
			status = acpi_ex_create_region (((acpi_parse2_object *) op)->data,
					  ((acpi_parse2_object *) op)->length,
							 (ACPI_ADR_SPACE_TYPE) arg->value.integer, walk_state);
			break;


		case AML_NAME_OP:

			status = acpi_ds_create_node (walk_state, node, op);
			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->value.string,
				  ACPI_TYPE_ANY, IMODE_LOAD_PASS2,
				  NS_SEARCH_PARENT | NS_DONT_OPEN_SCOPE,
				  walk_state, &(new_node));
		if (ACPI_SUCCESS (status)) {
			/* TBD: has name already been resolved by here ??*/

			/* TBD: [Restructure] 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! */

			/* 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->node = new_node;
		}

		break;


	default:
		break;
	}


cleanup:

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

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