*****************************************************************************/
/*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* POSSIBILITY OF SUCH DAMAGES.
*/
-
#include <acpi/acpi.h>
#include <acpi/acparser.h>
#include <acpi/amlcode.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#include <acpi/acnamesp.h>
-
+#include <acpi/acdisasm.h>
#define _COMPONENT ACPI_DISPATCHER
- ACPI_MODULE_NAME ("dsmethod")
-
+ACPI_MODULE_NAME("dsmethod")
/*******************************************************************************
*
- * FUNCTION: acpi_ds_parse_method
+ * FUNCTION: acpi_ds_method_error
*
- * PARAMETERS: obj_handle - Method node
+ * PARAMETERS: Status - Execution status
+ * walk_state - Current state
*
* RETURN: Status
*
- * DESCRIPTION: Call the parser and parse the AML that is associated with the
- * method.
+ * DESCRIPTION: Called on method error. Invoke the global exception handler if
+ * present, dump the method data if the disassembler is configured
*
- * MUTEX: Assumes parser is locked
+ * Note: Allows the exception handler to change the status code
*
******************************************************************************/
-
acpi_status
-acpi_ds_parse_method (
- acpi_handle obj_handle)
+acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state)
{
- acpi_status status;
- union acpi_operand_object *obj_desc;
- union acpi_parse_object *op;
- struct acpi_namespace_node *node;
- acpi_owner_id owner_id;
- struct acpi_walk_state *walk_state;
-
-
- ACPI_FUNCTION_TRACE_PTR ("ds_parse_method", obj_handle);
-
-
- /* Parameter Validation */
+ ACPI_FUNCTION_ENTRY();
- if (!obj_handle) {
- return_ACPI_STATUS (AE_NULL_ENTRY);
- }
-
- ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Parsing [%4.4s] **** named_obj=%p\n",
- acpi_ut_get_node_name (obj_handle), obj_handle));
-
- /* Extract the method object from the method Node */
-
- node = (struct acpi_namespace_node *) obj_handle;
- 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);
- }
- }
+ /* Ignore AE_OK and control exception codes */
- /*
- * 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);
+ if (ACPI_SUCCESS(status) || (status & AE_CODE_CONTROL)) {
+ return (status);
}
- /* Init new op with the method name and pointer back to the Node */
+ /* Invoke the global exception handler */
- 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.
- */
- owner_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD);
- obj_desc->method.owning_id = owner_id;
+ if (acpi_gbl_exception_handler) {
+ /* Exit the interpreter, allow handler to execute methods */
- /* Create and initialize a new walk state */
+ acpi_ex_exit_interpreter();
- walk_state = acpi_ds_create_walk_state (owner_id, NULL, NULL, NULL);
- if (!walk_state) {
- return_ACPI_STATUS (AE_NO_MEMORY);
+ /*
+ * Handler can map the exception code to anything it wants, including
+ * AE_OK, in which case the executing method will not be aborted.
+ */
+ status = acpi_gbl_exception_handler(status,
+ walk_state->method_node ?
+ walk_state->method_node->
+ name.integer : 0,
+ walk_state->opcode,
+ walk_state->aml_offset,
+ NULL);
+ (void)acpi_ex_enter_interpreter();
}
+#ifdef ACPI_DISASSEMBLER
+ if (ACPI_FAILURE(status)) {
+ /* Display method locals/args if disassembler is present */
- 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);
- return_ACPI_STATUS (status);
+ acpi_dm_dump_method_info(status, walk_state, walk_state->op);
}
+#endif
- /*
- * 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)) {
- return_ACPI_STATUS (status);
- }
-
- ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
- "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n",
- acpi_ut_get_node_name (obj_handle), obj_handle, op));
-
- acpi_ps_delete_parse_tree (op);
- return_ACPI_STATUS (status);
+ return (status);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ds_begin_method_execution
******************************************************************************/
acpi_status
-acpi_ds_begin_method_execution (
- struct acpi_namespace_node *method_node,
- union acpi_operand_object *obj_desc,
- struct acpi_namespace_node *calling_method_node)
+acpi_ds_begin_method_execution(struct acpi_namespace_node * method_node,
+ union acpi_operand_object * obj_desc,
+ struct acpi_namespace_node * calling_method_node)
{
- acpi_status status = AE_OK;
+ acpi_status status = AE_OK;
+ ACPI_FUNCTION_TRACE_PTR("ds_begin_method_execution", method_node);
- ACPI_FUNCTION_TRACE_PTR ("ds_begin_method_execution", method_node);
+ if (!method_node) {
+ return_ACPI_STATUS(AE_NULL_ENTRY);
+ }
+ /* Prevent wraparound of thread count */
- if (!method_node) {
- return_ACPI_STATUS (AE_NULL_ENTRY);
+ if (obj_desc->method.thread_count == ACPI_UINT8_MAX) {
+ ACPI_ERROR((AE_INFO,
+ "Method reached maximum reentrancy limit (255)"));
+ return_ACPI_STATUS(AE_AML_METHOD_LIMIT);
}
/*
* thread that is making recursive method calls.
*/
if (method_node == calling_method_node) {
- if (obj_desc->method.thread_count >= obj_desc->method.concurrency) {
- return_ACPI_STATUS (AE_AML_METHOD_LIMIT);
+ if (obj_desc->method.thread_count >=
+ obj_desc->method.concurrency) {
+ return_ACPI_STATUS(AE_AML_METHOD_LIMIT);
}
}
* Get a unit from the method semaphore. This releases the
* interpreter if we block
*/
- status = acpi_ex_system_wait_semaphore (obj_desc->method.semaphore,
- ACPI_WAIT_FOREVER);
+ status =
+ acpi_ex_system_wait_semaphore(obj_desc->method.semaphore,
+ ACPI_WAIT_FOREVER);
+ }
+
+ /*
+ * Allocate an Owner ID for this method, only if this is the first thread
+ * to begin concurrent execution. We only need one owner_id, even if the
+ * method is invoked recursively.
+ */
+ if (!obj_desc->method.owner_id) {
+ status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
}
/*
* reentered one more time (even if it is the same thread)
*/
obj_desc->method.thread_count++;
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ds_call_control_method
******************************************************************************/
acpi_status
-acpi_ds_call_control_method (
- struct acpi_thread_state *thread,
- struct acpi_walk_state *this_walk_state,
- union acpi_parse_object *op)
+acpi_ds_call_control_method(struct acpi_thread_state *thread,
+ struct acpi_walk_state *this_walk_state,
+ union acpi_parse_object *op)
{
- acpi_status status;
- struct acpi_namespace_node *method_node;
- struct acpi_walk_state *next_walk_state;
- union acpi_operand_object *obj_desc;
- struct acpi_parameter_info info;
- u32 i;
+ acpi_status status;
+ struct acpi_namespace_node *method_node;
+ struct acpi_walk_state *next_walk_state = NULL;
+ union acpi_operand_object *obj_desc;
+ struct acpi_parameter_info info;
+ u32 i;
+ ACPI_FUNCTION_TRACE_PTR("ds_call_control_method", this_walk_state);
- ACPI_FUNCTION_TRACE_PTR ("ds_call_control_method", this_walk_state);
-
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n",
- this_walk_state->prev_op, this_walk_state));
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "Execute method %p, currentstate=%p\n",
+ this_walk_state->prev_op, this_walk_state));
/*
* Get the namespace entry for the control method we are about to call
*/
method_node = this_walk_state->method_call_node;
if (!method_node) {
- return_ACPI_STATUS (AE_NULL_ENTRY);
+ return_ACPI_STATUS(AE_NULL_ENTRY);
}
- obj_desc = acpi_ns_get_attached_object (method_node);
+ obj_desc = acpi_ns_get_attached_object(method_node);
if (!obj_desc) {
- return_ACPI_STATUS (AE_NULL_OBJECT);
+ return_ACPI_STATUS(AE_NULL_OBJECT);
}
- obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD);
-
/* Init for new method, wait on concurrency semaphore */
- status = acpi_ds_begin_method_execution (method_node, obj_desc,
- this_walk_state->method_node);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
+ status = acpi_ds_begin_method_execution(method_node, obj_desc,
+ this_walk_state->method_node);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
}
if (!(obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY)) {
/* 1) Parse: Create a new walk state for the preempting walk */
- next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id,
- op, obj_desc, NULL);
+ next_walk_state =
+ acpi_ds_create_walk_state(obj_desc->method.owner_id, op,
+ obj_desc, NULL);
if (!next_walk_state) {
- return_ACPI_STATUS (AE_NO_MEMORY);
+ return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Create and init a Root Node */
- op = acpi_ps_create_scope_op ();
+ op = acpi_ps_create_scope_op();
if (!op) {
status = AE_NO_MEMORY;
goto cleanup;
}
- status = acpi_ds_init_aml_walk (next_walk_state, op, method_node,
- obj_desc->method.aml_start, obj_desc->method.aml_length,
- NULL, 1);
- if (ACPI_FAILURE (status)) {
- acpi_ds_delete_walk_state (next_walk_state);
+ status = acpi_ds_init_aml_walk(next_walk_state, op, method_node,
+ obj_desc->method.aml_start,
+ obj_desc->method.aml_length,
+ NULL, 1);
+ if (ACPI_FAILURE(status)) {
+ acpi_ds_delete_walk_state(next_walk_state);
goto cleanup;
}
/* Begin AML parse */
- status = acpi_ps_parse_aml (next_walk_state);
- acpi_ps_delete_parse_tree (op);
+ status = acpi_ps_parse_aml(next_walk_state);
+ acpi_ps_delete_parse_tree(op);
}
/* 2) Execute: Create a new state for the preempting walk */
- next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id,
- NULL, obj_desc, thread);
+ next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id,
+ NULL, obj_desc, thread);
if (!next_walk_state) {
status = AE_NO_MEMORY;
goto cleanup;
}
/*
* The resolved arguments were put on the previous walk state's operand
- * stack. Operands on the previous walk state stack always
- * start at index 0.
- * Null terminate the list of arguments
+ * stack. Operands on the previous walk state stack always
+ * start at index 0. Also, null terminate the list of arguments
*/
- this_walk_state->operands [this_walk_state->num_operands] = NULL;
+ this_walk_state->operands[this_walk_state->num_operands] = NULL;
info.parameters = &this_walk_state->operands[0];
info.parameter_type = ACPI_PARAM_ARGS;
- status = acpi_ds_init_aml_walk (next_walk_state, NULL, method_node,
- obj_desc->method.aml_start, obj_desc->method.aml_length,
- &info, 3);
- if (ACPI_FAILURE (status)) {
+ status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node,
+ obj_desc->method.aml_start,
+ obj_desc->method.aml_length, &info, 3);
+ if (ACPI_FAILURE(status)) {
goto cleanup;
}
* (they were copied to new objects)
*/
for (i = 0; i < obj_desc->method.param_count; i++) {
- acpi_ut_remove_reference (this_walk_state->operands [i]);
- this_walk_state->operands [i] = NULL;
+ acpi_ut_remove_reference(this_walk_state->operands[i]);
+ this_walk_state->operands[i] = NULL;
}
/* Clear the operand stack */
this_walk_state->num_operands = 0;
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "Starting nested execution, newstate=%p\n", next_walk_state));
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "Starting nested execution, newstate=%p\n",
+ next_walk_state));
if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
- status = obj_desc->method.implementation (next_walk_state);
- return_ACPI_STATUS (status);
+ status = obj_desc->method.implementation(next_walk_state);
}
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(status);
+ cleanup:
+ /* Decrement the thread count on the method parse tree */
- /* On error, we must delete the new walk state */
-
-cleanup:
if (next_walk_state && (next_walk_state->method_desc)) {
- /* Decrement the thread count on the method parse tree */
-
- next_walk_state->method_desc->method.thread_count--;
+ next_walk_state->method_desc->method.thread_count--;
}
- (void) acpi_ds_terminate_control_method (next_walk_state);
- acpi_ds_delete_walk_state (next_walk_state);
- return_ACPI_STATUS (status);
-}
+ /* On error, we must delete the new walk state */
+
+ acpi_ds_terminate_control_method(next_walk_state);
+ acpi_ds_delete_walk_state(next_walk_state);
+ return_ACPI_STATUS(status);
+}
/*******************************************************************************
*
******************************************************************************/
acpi_status
-acpi_ds_restart_control_method (
- struct acpi_walk_state *walk_state,
- union acpi_operand_object *return_desc)
+acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
+ union acpi_operand_object *return_desc)
{
- acpi_status status;
-
+ acpi_status status;
- ACPI_FUNCTION_TRACE_PTR ("ds_restart_control_method", walk_state);
+ ACPI_FUNCTION_TRACE_PTR("ds_restart_control_method", walk_state);
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "****Restart [%4.4s] Op %p return_value_from_callee %p\n",
+ (char *)&walk_state->method_node->name,
+ walk_state->method_call_op, return_desc));
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "****Restart [%4.4s] Op %p return_value_from_callee %p\n",
- (char *) &walk_state->method_node->name, walk_state->method_call_op,
- return_desc));
-
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- " return_from_this_method_used?=%X res_stack %p Walk %p\n",
- walk_state->return_used,
- walk_state->results, walk_state));
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ " return_from_this_method_used?=%X res_stack %p Walk %p\n",
+ walk_state->return_used,
+ walk_state->results, walk_state));
/* Did the called method return a value? */
if (walk_state->return_used) {
/* Save the return value from the previous method */
- status = acpi_ds_result_push (return_desc, walk_state);
- if (ACPI_FAILURE (status)) {
- acpi_ut_remove_reference (return_desc);
- return_ACPI_STATUS (status);
+ status = acpi_ds_result_push(return_desc, walk_state);
+ if (ACPI_FAILURE(status)) {
+ acpi_ut_remove_reference(return_desc);
+ return_ACPI_STATUS(status);
}
/*
* NOTE: this is optional because the ASL language does not actually
* support this behavior.
*/
- else if (!acpi_ds_do_implicit_return (return_desc, walk_state, FALSE)) {
+ else if (!acpi_ds_do_implicit_return
+ (return_desc, walk_state, FALSE)) {
/*
* Delete the return value if it will not be used by the
* calling method
*/
- acpi_ut_remove_reference (return_desc);
+ acpi_ut_remove_reference(return_desc);
}
}
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ds_terminate_control_method
*
* PARAMETERS: walk_state - State of the method
*
- * RETURN: Status
+ * RETURN: None
*
* DESCRIPTION: Terminate a control method. Delete everything that the method
* created, delete all locals and arguments, and delete the parse
*
******************************************************************************/
-acpi_status
-acpi_ds_terminate_control_method (
- struct acpi_walk_state *walk_state)
+void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
{
- union acpi_operand_object *obj_desc;
- struct acpi_namespace_node *method_node;
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE_PTR ("ds_terminate_control_method", walk_state);
+ union acpi_operand_object *obj_desc;
+ struct acpi_namespace_node *method_node;
+ acpi_status status;
+ ACPI_FUNCTION_TRACE_PTR("ds_terminate_control_method", walk_state);
if (!walk_state) {
- return (AE_BAD_PARAMETER);
+ return_VOID;
}
/* The current method object was saved in the walk state */
obj_desc = walk_state->method_desc;
if (!obj_desc) {
- return_ACPI_STATUS (AE_OK);
+ return_VOID;
}
/* Delete all arguments and locals */
- acpi_ds_method_data_delete_all (walk_state);
+ acpi_ds_method_data_delete_all(walk_state);
/*
* Lock the parser while we terminate this method.
* If this is the last thread executing the method,
* we have additional cleanup to perform
*/
- status = acpi_ut_acquire_mutex (ACPI_MTX_PARSER);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
+ status = acpi_ut_acquire_mutex(ACPI_MTX_PARSER);
+ if (ACPI_FAILURE(status)) {
+ return_VOID;
}
/* Signal completion of the execution of this method if necessary */
if (walk_state->method_desc->method.semaphore) {
- status = acpi_os_signal_semaphore (
- walk_state->method_desc->method.semaphore, 1);
- if (ACPI_FAILURE (status)) {
- ACPI_REPORT_ERROR (("Could not signal method semaphore\n"));
- status = AE_OK;
+ status =
+ acpi_os_signal_semaphore(walk_state->method_desc->method.
+ semaphore, 1);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO,
+ "Could not signal method semaphore"));
/* Ignore error and continue cleanup */
}
}
- if (walk_state->method_desc->method.thread_count) {
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "*** Not deleting method namespace, there are still %d threads\n",
- walk_state->method_desc->method.thread_count));
+ /*
+ * There are no more threads executing this method. Perform
+ * additional cleanup.
+ *
+ * The method Node is stored in the walk state
+ */
+ method_node = walk_state->method_node;
+
+ /* Lock namespace for possible update */
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /*
+ * Delete any namespace entries created immediately underneath
+ * the method
+ */
+ if (method_node->child) {
+ acpi_ns_delete_namespace_subtree(method_node);
}
- if (!walk_state->method_desc->method.thread_count) {
+ /*
+ * Delete any namespace entries created anywhere else within
+ * the namespace by the execution of this method
+ */
+ acpi_ns_delete_namespace_by_owner(walk_state->method_desc->method.
+ owner_id);
+ status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+ /* Are there any other threads currently executing this method? */
+
+ if (walk_state->method_desc->method.thread_count) {
+ /*
+ * Additional threads. Do not release the owner_id in this case,
+ * we immediately reuse it for the next thread executing this method
+ */
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "*** Completed execution of one thread, %d threads remaining\n",
+ walk_state->method_desc->method.
+ thread_count));
+ } else {
+ /* This is the only executing thread for this method */
+
/*
* Support to dynamically change a method from not_serialized to
- * Serialized if it appears that the method is written foolishly and
+ * Serialized if it appears that the method is incorrectly written and
* does not support multiple thread execution. The best example of this
* is if such a method creates namespace objects and blocks. A second
* thread will fail with an AE_ALREADY_EXISTS exception
* before creating the synchronization semaphore.
*/
if ((walk_state->method_desc->method.concurrency == 1) &&
- (!walk_state->method_desc->method.semaphore)) {
- status = acpi_os_create_semaphore (1,
- 1,
- &walk_state->method_desc->method.semaphore);
+ (!walk_state->method_desc->method.semaphore)) {
+ status = acpi_os_create_semaphore(1, 1,
+ &walk_state->
+ method_desc->method.
+ semaphore);
}
- /*
- * There are no more threads executing this method. Perform
- * additional cleanup.
- *
- * The method Node is stored in the walk state
- */
- method_node = walk_state->method_node;
+ /* No more threads, we can free the owner_id */
- /*
- * Delete any namespace entries created immediately underneath
- * the method
- */
- status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
+ acpi_ut_release_owner_id(&walk_state->method_desc->method.
+ owner_id);
+ }
- if (method_node->child) {
- acpi_ns_delete_namespace_subtree (method_node);
- }
+ exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_PARSER);
+ return_VOID;
+}
- /*
- * Delete any namespace entries created anywhere else within
- * the namespace
- */
- acpi_ns_delete_namespace_by_owner (walk_state->method_desc->method.owning_id);
- status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
+#ifdef ACPI_INIT_PARSE_METHODS
+ /*
+ * Note 11/2005: Removed this code to parse all methods during table
+ * load because it causes problems if there are any errors during the
+ * parse. Also, it seems like overkill and we probably don't want to
+ * abort a table load because of an issue with a single method.
+ */
+
+/*******************************************************************************
+ *
+ * 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);
}
}
- status = acpi_ut_release_mutex (ACPI_MTX_PARSER);
- 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);
+}
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff