X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Facpi%2Fdispatcher%2Fdsmethod.c;h=c475546535b652fb313456c5440519c6fc66a0b9;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=9f0456cb9bb55c7d771c77dd487e6f6b7ebf3ce8;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c index 9f0456cb9..c47554653 100644 --- a/drivers/acpi/dispatcher/dsmethod.c +++ b/drivers/acpi/dispatcher/dsmethod.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * 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 @@ -41,139 +41,74 @@ * POSSIBILITY OF SUCH DAMAGES. */ - #include #include #include #include #include #include - +#include #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 @@ -191,19 +126,24 @@ acpi_ds_parse_method ( ******************************************************************************/ 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); } /* @@ -220,8 +160,9 @@ acpi_ds_begin_method_execution ( * 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); } } @@ -229,8 +170,21 @@ acpi_ds_begin_method_execution ( * 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); + } } /* @@ -238,10 +192,9 @@ acpi_ds_begin_method_execution ( * 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 @@ -257,101 +210,99 @@ acpi_ds_begin_method_execution ( ******************************************************************************/ 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; } @@ -360,38 +311,37 @@ acpi_ds_call_control_method ( * (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); +} /******************************************************************************* * @@ -408,25 +358,22 @@ cleanup: ******************************************************************************/ 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? */ @@ -436,10 +383,10 @@ acpi_ds_restart_control_method ( 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); } /* @@ -457,26 +404,26 @@ acpi_ds_restart_control_method ( * 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 @@ -484,66 +431,101 @@ acpi_ds_restart_control_method ( * ******************************************************************************/ -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 @@ -552,46 +534,157 @@ acpi_ds_terminate_control_method ( * 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