diff options
Diffstat (limited to 'drivers/acpi/acpica/nseval.c')
| -rw-r--r-- | drivers/acpi/acpica/nseval.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nseval.c b/drivers/acpi/acpica/nseval.c index 8e7dec1176c9..846d1132feb1 100644 --- a/drivers/acpi/acpica/nseval.c +++ b/drivers/acpi/acpica/nseval.c @@ -50,6 +50,11 @@ #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME("nseval") +/* Local prototypes */ +static void +acpi_ns_exec_module_code(union acpi_operand_object *method_obj, + struct acpi_evaluate_info *info); + /******************************************************************************* * * FUNCTION: acpi_ns_evaluate @@ -76,6 +81,7 @@ ACPI_MODULE_NAME("nseval") * MUTEX: Locks interpreter * ******************************************************************************/ + acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info) { acpi_status status; @@ -276,3 +282,134 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info) */ return_ACPI_STATUS(status); } + +/******************************************************************************* + * + * FUNCTION: acpi_ns_exec_module_code_list + * + * PARAMETERS: None + * + * RETURN: None. Exceptions during method execution are ignored, since + * we cannot abort a table load. + * + * DESCRIPTION: Execute all elements of the global module-level code list. + * Each element is executed as a single control method. + * + ******************************************************************************/ + +void acpi_ns_exec_module_code_list(void) +{ + union acpi_operand_object *prev; + union acpi_operand_object *next; + struct acpi_evaluate_info *info; + u32 method_count = 0; + + ACPI_FUNCTION_TRACE(ns_exec_module_code_list); + + /* Exit now if the list is empty */ + + next = acpi_gbl_module_code_list; + if (!next) { + return_VOID; + } + + /* Allocate the evaluation information block */ + + info = ACPI_ALLOCATE(sizeof(struct acpi_evaluate_info)); + if (!info) { + return_VOID; + } + + /* Walk the list, executing each "method" */ + + while (next) { + prev = next; + next = next->method.mutex; + + /* Clear the link field and execute the method */ + + prev->method.mutex = NULL; + acpi_ns_exec_module_code(prev, info); + method_count++; + + /* Delete the (temporary) method object */ + + acpi_ut_remove_reference(prev); + } + + ACPI_INFO((AE_INFO, + "Executed %u blocks of module-level executable AML code", + method_count)); + + ACPI_FREE(info); + acpi_gbl_module_code_list = NULL; + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_exec_module_code + * + * PARAMETERS: method_obj - Object container for the module-level code + * Info - Info block for method evaluation + * + * RETURN: None. Exceptions during method execution are ignored, since + * we cannot abort a table load. + * + * DESCRIPTION: Execute a control method containing a block of module-level + * executable AML code. The control method is temporarily + * installed to the root node, then evaluated. + * + ******************************************************************************/ + +static void +acpi_ns_exec_module_code(union acpi_operand_object *method_obj, + struct acpi_evaluate_info *info) +{ + union acpi_operand_object *root_obj; + acpi_status status; + + ACPI_FUNCTION_TRACE(ns_exec_module_code); + + /* Initialize the evaluation information block */ + + ACPI_MEMSET(info, 0, sizeof(struct acpi_evaluate_info)); + info->prefix_node = acpi_gbl_root_node; + + /* + * Get the currently attached root object. Add a reference, because the + * ref count will be decreased when the method object is installed to + * the root node. + */ + root_obj = acpi_ns_get_attached_object(acpi_gbl_root_node); + acpi_ut_add_reference(root_obj); + + /* Install the method (module-level code) in the root node */ + + status = acpi_ns_attach_object(acpi_gbl_root_node, method_obj, + ACPI_TYPE_METHOD); + if (ACPI_FAILURE(status)) { + goto exit; + } + + /* Execute the root node as a control method */ + + status = acpi_ns_evaluate(info); + + ACPI_DEBUG_PRINT((ACPI_DB_INIT, "Executed module-level code at %p\n", + method_obj->method.aml_start)); + + /* Detach the temporary method object */ + + acpi_ns_detach_object(acpi_gbl_root_node); + + /* Restore the original root object */ + + status = + acpi_ns_attach_object(acpi_gbl_root_node, root_obj, + ACPI_TYPE_DEVICE); + + exit: + acpi_ut_remove_reference(root_obj); + return_VOID; +} |