Exemplo n.º 1
0
acpi_status
acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
			      union acpi_operand_object *obj_desc)
{
	acpi_status status;
	union acpi_parse_object *op = NULL;
	struct acpi_walk_state *walk_state;

	ACPI_FUNCTION_TRACE_PTR(ds_auto_serialize_method, node);

	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "Method auto-serialization parse [%4.4s] %p\n",
			  acpi_ut_get_node_name(node), node));

	acpi_ex_enter_interpreter();

	/* Create/Init a root op for the method parse tree */

	op = acpi_ps_alloc_op(AML_METHOD_OP, obj_desc->method.aml_start);
	if (!op) {
		status = AE_NO_MEMORY;
		goto unlock;
	}

	acpi_ps_set_name(op, node->name.integer);
	op->common.node = node;

	/* Create and initialize a new walk state */

	walk_state =
	    acpi_ds_create_walk_state(node->owner_id, NULL, NULL, NULL);
	if (!walk_state) {
		acpi_ps_free_op(op);
		status = AE_NO_MEMORY;
		goto unlock;
	}

	status = acpi_ds_init_aml_walk(walk_state, op, node,
				       obj_desc->method.aml_start,
				       obj_desc->method.aml_length, NULL, 0);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		acpi_ps_free_op(op);
		return_ACPI_STATUS(status);
	}

	walk_state->descending_callback = acpi_ds_detect_named_opcodes;

	/* Parse the method, scan for creation of named objects */

	status = acpi_ps_parse_aml(walk_state);

	acpi_ps_delete_parse_tree(op);
unlock:
	acpi_ex_exit_interpreter();
	return_ACPI_STATUS(status);
}
Exemplo n.º 2
0
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_parse_method
 *
 * PARAMETERS:  Node        - Method node
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Parse the AML that is associated with the method.
 *
 * MUTEX:       Assumes parser is locked
 *
 ******************************************************************************/
acpi_status acpi_ds_parse_method(struct acpi_namespace_node *node)
{
	acpi_status status;
	union acpi_operand_object *obj_desc;
	union acpi_parse_object *op;
	struct acpi_walk_state *walk_state;

	ACPI_FUNCTION_TRACE_PTR("ds_parse_method", node);

	/* Parameter Validation */

	if (!node) {
		return_ACPI_STATUS(AE_NULL_ENTRY);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "**** Parsing [%4.4s] **** named_obj=%p\n",
			  acpi_ut_get_node_name(node), node));

	/* Extract the method object from the method Node */

	obj_desc = acpi_ns_get_attached_object(node);
	if (!obj_desc) {
		return_ACPI_STATUS(AE_NULL_OBJECT);
	}

	/* Create a mutex for the method if there is a concurrency limit */

	if ((obj_desc->method.concurrency != ACPI_INFINITE_CONCURRENCY) &&
	    (!obj_desc->method.semaphore)) {
		status = acpi_os_create_semaphore(obj_desc->method.concurrency,
						  obj_desc->method.concurrency,
						  &obj_desc->method.semaphore);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}
	}

	/*
	 * Allocate a new parser op to be the root of the parsed
	 * method tree
	 */
	op = acpi_ps_alloc_op(AML_METHOD_OP);
	if (!op) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Init new op with the method name and pointer back to the Node */

	acpi_ps_set_name(op, node->name.integer);
	op->common.node = node;

	/*
	 * Get a new owner_id for objects created by this method. Namespace
	 * objects (such as Operation Regions) can be created during the
	 * first pass parse.
	 */
	status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/* Create and initialize a new walk state */

	walk_state =
	    acpi_ds_create_walk_state(obj_desc->method.owner_id, NULL, NULL,
				      NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup2;
	}

	status = acpi_ds_init_aml_walk(walk_state, op, node,
				       obj_desc->method.aml_start,
				       obj_desc->method.aml_length, NULL, 1);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup2;
	}

	/*
	 * Parse the method, first pass
	 *
	 * The first pass load is where newly declared named objects are added into
	 * the namespace.  Actual evaluation of the named objects (what would be
	 * called a "second pass") happens during the actual execution of the
	 * method so that operands to the named objects can take on dynamic
	 * run-time values.
	 */
	status = acpi_ps_parse_aml(walk_state);
	if (ACPI_FAILURE(status)) {
		goto cleanup2;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n",
			  acpi_ut_get_node_name(node), node, op));

	/*
	 * Delete the parse tree. We simply re-parse the method for every
	 * execution since there isn't much overhead (compared to keeping lots
	 * of parse trees around)
	 */
	acpi_ns_delete_namespace_subtree(node);
	acpi_ns_delete_namespace_by_owner(obj_desc->method.owner_id);

      cleanup2:
	acpi_ut_release_owner_id(&obj_desc->method.owner_id);

      cleanup:
	acpi_ps_delete_parse_tree(op);
	return_ACPI_STATUS(status);
}
Exemplo n.º 3
0
acpi_status
acpi_psx_execute (
	acpi_namespace_node     *method_node,
	acpi_operand_object     **params,
	acpi_operand_object     **return_obj_desc)
{
	acpi_status             status;
	acpi_operand_object     *obj_desc;
	u32                     i;
	acpi_parse_object       *op;
	acpi_walk_state         *walk_state;


	FUNCTION_TRACE ("Psx_execute");


	/* Validate the Node and get the attached object */

	if (!method_node) {
		return_ACPI_STATUS (AE_NULL_ENTRY);
	}

	obj_desc = acpi_ns_get_attached_object (method_node);
	if (!obj_desc) {
		return_ACPI_STATUS (AE_NULL_OBJECT);
	}

	/* Init for new method, wait on concurrency semaphore */

	status = acpi_ds_begin_method_execution (method_node, obj_desc, NULL);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	if (params) {
		/*
		 * The caller "owns" the parameters, so give each one an extra
		 * reference
		 */
		for (i = 0; params[i]; i++) {
			acpi_ut_add_reference (params[i]);
		}
	}

	/*
	 * 1) Perform the first pass parse of the method to enter any
	 * named objects that it creates into the namespace
	 */
	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
		"**** Begin Method Parse **** Entry=%p obj=%p\n",
		method_node, obj_desc));

	/* Create and init a Root Node */

	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	/* Create and initialize a new walk state */

	walk_state = acpi_ds_create_walk_state (TABLE_ID_DSDT,
			   NULL, NULL, NULL);
	if (!walk_state) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_aml_walk (walk_state, op, method_node, obj_desc->method.aml_start,
			  obj_desc->method.aml_length, NULL, NULL, 1);
	if (ACPI_FAILURE (status)) {
		/* TBD: delete walk state */
		return_ACPI_STATUS (status);
	}

	/* Parse the AML */

	status = acpi_ps_parse_aml (walk_state);
	acpi_ps_delete_parse_tree (op);


	/*
	 * 2) Execute the method.  Performs second pass parse simultaneously
	 */
	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
		"**** Begin Method Execution **** Entry=%p obj=%p\n",
		method_node, obj_desc));

	/* Create and init a Root Node */

	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	/* Init new op with the method name and pointer back to the NS node */

	acpi_ps_set_name (op, method_node->name);
	op->node = method_node;

	/* Create and initialize a new walk state */

	walk_state = acpi_ds_create_walk_state (TABLE_ID_DSDT,
			   NULL, NULL, NULL);
	if (!walk_state) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_aml_walk (walk_state, op, method_node, obj_desc->method.aml_start,
			  obj_desc->method.aml_length, params, return_obj_desc, 3);
	if (ACPI_FAILURE (status)) {
		/* TBD: delete walk state */
		return_ACPI_STATUS (status);
	}

	/*
	 * The walk of the parse tree is where we actually execute the method
	 */
	status = acpi_ps_parse_aml (walk_state);
	acpi_ps_delete_parse_tree (op);

	if (params) {
		/* Take away the extra reference that we gave the parameters above */

		for (i = 0; params[i]; i++) {
			acpi_ut_update_object_reference (params[i], REF_DECREMENT);
		}
	}


	if (ACPI_FAILURE (status)) {
		DUMP_PATHNAME (method_node, "Ps_execute: method failed -",
			ACPI_LV_ERROR, _COMPONENT);
	}


	/*
	 * If the method has returned an object, signal this to the caller with
	 * a control exception code
	 */
	if (*return_obj_desc) {
		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Method returned Obj_desc=%p\n",
			*return_obj_desc));
		DUMP_STACK_ENTRY (*return_obj_desc);

		status = AE_CTRL_RETURN_VALUE;
	}


	return_ACPI_STATUS (status);
}
Exemplo n.º 4
0
static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
						       *parser_state)
{
	u32 aml_offset = (u32)
	    ACPI_PTR_DIFF(parser_state->aml,
			  parser_state->aml_start);
	union acpi_parse_object *field;
	u16 opcode;
	u32 name;

	ACPI_FUNCTION_TRACE("ps_get_next_field");

	/* Determine field type */

	switch (ACPI_GET8(parser_state->aml)) {
	default:

		opcode = AML_INT_NAMEDFIELD_OP;
		break;

	case 0x00:

		opcode = AML_INT_RESERVEDFIELD_OP;
		parser_state->aml++;
		break;

	case 0x01:

		opcode = AML_INT_ACCESSFIELD_OP;
		parser_state->aml++;
		break;
	}

	/* Allocate a new field op */

	field = acpi_ps_alloc_op(opcode);
	if (!field) {
		return_PTR(NULL);
	}

	field->common.aml_offset = aml_offset;

	/* Decode the field type */

	switch (opcode) {
	case AML_INT_NAMEDFIELD_OP:

		/* Get the 4-character name */

		ACPI_MOVE_32_TO_32(&name, parser_state->aml);
		acpi_ps_set_name(field, name);
		parser_state->aml += ACPI_NAME_SIZE;

		/* Get the length which is encoded as a package length */

		field->common.value.size =
		    acpi_ps_get_next_package_length(parser_state);
		break;

	case AML_INT_RESERVEDFIELD_OP:

		/* Get the length which is encoded as a package length */

		field->common.value.size =
		    acpi_ps_get_next_package_length(parser_state);
		break;

	case AML_INT_ACCESSFIELD_OP:

		/*
		 * Get access_type and access_attrib and merge into the field Op
		 * access_type is first operand, access_attribute is second
		 */
		field->common.value.integer =
		    (ACPI_GET8(parser_state->aml) << 8);
		parser_state->aml++;
		field->common.value.integer |= ACPI_GET8(parser_state->aml);
		parser_state->aml++;
		break;

	default:

		/* Opcode was set in previous switch */
		break;
	}

	return_PTR(field);
}
Exemplo n.º 5
0
ACPI_STATUS
acpi_ds_parse_method (
	ACPI_HANDLE             obj_handle)
{
	ACPI_STATUS             status;
	ACPI_OPERAND_OBJECT     *obj_desc;
	ACPI_PARSE_OBJECT       *op;
	ACPI_NAMESPACE_NODE     *node;
	ACPI_OWNER_ID           owner_id;


	/* Parameter Validation */

	if (!obj_handle) {
		return (AE_NULL_ENTRY);
	}


	/* Extract the method object from the method Node */

	node = (ACPI_NAMESPACE_NODE *) obj_handle;
	obj_desc = node->object;
	if (!obj_desc) {
		return (AE_NULL_OBJECT);
	}

	 /* Create a mutex for the method if there is a concurrency limit */

	if ((obj_desc->method.concurrency != INFINITE_CONCURRENCY) &&
		(!obj_desc->method.semaphore))
	{
		status = acpi_os_create_semaphore (1,obj_desc->method.concurrency,
				   &obj_desc->method.semaphore);
		if (ACPI_FAILURE (status)) {
			return (status);
		}
	}

	/*
	 * Allocate a new parser op to be the root of the parsed
	 * method tree
	 */

	op = acpi_ps_alloc_op (AML_METHOD_OP);
	if (!op) {
		return (AE_NO_MEMORY);
	}

	/* Init new op with the method name and pointer back to the Node */

	acpi_ps_set_name (op, node->name);
	op->node = node;


	/*
	 * Parse the method, first pass
	 *
	 * The first pass load is
	 * where newly declared named objects are
	 * added into the namespace.  Actual evaluation of
	 * the named objects (what would be called a "second
	 * pass") happens during the actual execution of the
	 * method so that operands to the named objects can
	 * take on dynamic run-time values.
	 */

	status = acpi_ps_parse_aml (op, obj_desc->method.pcode,
			   obj_desc->method.pcode_length,
			   ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE,
			   node, NULL, NULL,
			   acpi_ds_load1_begin_op, acpi_ds_load1_end_op);

	if (ACPI_FAILURE (status)) {
		return (status);
	}

	/* Get a new Owner_id for objects created by this method */

	owner_id = acpi_cm_allocate_owner_id (OWNER_TYPE_METHOD);
	obj_desc->method.owning_id = owner_id;

	/* Install the parsed tree in the method object */
	/* TBD: [Restructure] Obsolete field? */

	acpi_ps_delete_parse_tree (op);


	return (status);
}
Exemplo n.º 6
0
acpi_status
acpi_psx_execute (
	struct acpi_parameter_info      *info)
{
	acpi_status                     status;
	union acpi_operand_object       *obj_desc;
	u32                             i;
	union acpi_parse_object         *op;
	struct acpi_walk_state          *walk_state;


	ACPI_FUNCTION_TRACE ("psx_execute");


	/* Validate the Node and get the attached object */

	if (!info || !info->node) {
		return_ACPI_STATUS (AE_NULL_ENTRY);
	}

	obj_desc = acpi_ns_get_attached_object (info->node);
	if (!obj_desc) {
		return_ACPI_STATUS (AE_NULL_OBJECT);
	}

	/* Init for new method, wait on concurrency semaphore */

	status = acpi_ds_begin_method_execution (info->node, obj_desc, NULL);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	if ((info->parameter_type == ACPI_PARAM_ARGS) &&
		(info->parameters)) {
		/*
		 * The caller "owns" the parameters, so give each one an extra
		 * reference
		 */
		for (i = 0; info->parameters[i]; i++) {
			acpi_ut_add_reference (info->parameters[i]);
		}
	}

	/*
	 * 1) Perform the first pass parse of the method to enter any
	 * named objects that it creates into the namespace
	 */
	ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
		"**** Begin Method Parse **** Entry=%p obj=%p\n",
		info->node, obj_desc));

	/* Create and init a Root Node */

	op = acpi_ps_create_scope_op ();
	if (!op) {
		status = AE_NO_MEMORY;
		goto cleanup1;
	}

	/*
	 * Get a new owner_id for objects created by this method. Namespace
	 * objects (such as Operation Regions) can be created during the
	 * first pass parse.
	 */
	obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD);

	/* Create and initialize a new walk state */

	walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id,
			   NULL, NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup2;
	}

	status = acpi_ds_init_aml_walk (walk_state, op, info->node,
			  obj_desc->method.aml_start,
			  obj_desc->method.aml_length, NULL, 1);
	if (ACPI_FAILURE (status)) {
		goto cleanup3;
	}

	/* Parse the AML */

	status = acpi_ps_parse_aml (walk_state);
	acpi_ps_delete_parse_tree (op);
	if (ACPI_FAILURE (status)) {
		goto cleanup1; /* Walk state is already deleted */
	}

	/*
	 * 2) Execute the method.  Performs second pass parse simultaneously
	 */
	ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
		"**** Begin Method Execution **** Entry=%p obj=%p\n",
		info->node, obj_desc));

	/* Create and init a Root Node */

	op = acpi_ps_create_scope_op ();
	if (!op) {
		status = AE_NO_MEMORY;
		goto cleanup1;
	}

	/* Init new op with the method name and pointer back to the NS node */

	acpi_ps_set_name (op, info->node->name.integer);
	op->common.node = info->node;

	/* Create and initialize a new walk state */

	walk_state = acpi_ds_create_walk_state (0, NULL, NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup2;
	}

	status = acpi_ds_init_aml_walk (walk_state, op, info->node,
			  obj_desc->method.aml_start,
			  obj_desc->method.aml_length, info, 3);
	if (ACPI_FAILURE (status)) {
		goto cleanup3;
	}

	/* The walk of the parse tree is where we actually execute the method */

	status = acpi_ps_parse_aml (walk_state);
	goto cleanup2; /* Walk state already deleted */


cleanup3:
	acpi_ds_delete_walk_state (walk_state);

cleanup2:
	acpi_ps_delete_parse_tree (op);

cleanup1:
	if ((info->parameter_type == ACPI_PARAM_ARGS) &&
		(info->parameters)) {
		/* Take away the extra reference that we gave the parameters above */

		for (i = 0; info->parameters[i]; i++) {
			/* Ignore errors, just do them all */

			(void) acpi_ut_update_object_reference (
					 info->parameters[i], REF_DECREMENT);
		}
	}

	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/*
	 * If the method has returned an object, signal this to the caller with
	 * a control exception code
	 */
	if (info->return_object) {
		ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Method returned obj_desc=%p\n",
			info->return_object));
		ACPI_DUMP_STACK_ENTRY (info->return_object);

		status = AE_CTRL_RETURN_VALUE;
	}

	return_ACPI_STATUS (status);
}
Exemplo n.º 7
0
ACPI_PARSE_OBJECT *
acpi_ps_get_next_field (
	ACPI_PARSE_STATE        *parser_state)
{
	ACPI_PTRDIFF            aml_offset = parser_state->aml -
			 parser_state->aml_start;
	ACPI_PARSE_OBJECT       *field;
	u16                     opcode;
	u32                     name;


	/* determine field type */

	switch (GET8 (parser_state->aml))
	{

	default:

		opcode = AML_NAMEDFIELD_OP;
		break;


	case 0x00:

		opcode = AML_RESERVEDFIELD_OP;
		parser_state->aml++;
		break;


	case 0x01:

		opcode = AML_ACCESSFIELD_OP;
		parser_state->aml++;
		break;
	}


	/* Allocate a new field op */

	field = acpi_ps_alloc_op (opcode);
	if (field) {
		field->aml_offset = aml_offset;

		/* Decode the field type */

		switch (opcode)
		{
		case AML_NAMEDFIELD_OP:

			/* Get the 4-character name */

			MOVE_UNALIGNED32_TO_32 (&name, parser_state->aml);
			acpi_ps_set_name (field, name);
			parser_state->aml += 4;

			/* Get the length which is encoded as a package length */

			field->value.size = acpi_ps_get_next_package_length (parser_state);
			break;


		case AML_RESERVEDFIELD_OP:

			/* Get the length which is encoded as a package length */

			field->value.size = acpi_ps_get_next_package_length (parser_state);
			break;


		case AML_ACCESSFIELD_OP:

			/* Get Access_type and Access_atrib and merge into the field Op */

			field->value.integer = ((GET8 (parser_state->aml) << 8) |
					  GET8 (parser_state->aml));
			parser_state->aml += 2;
			break;
		}
	}

	return (field);
}