1 /******************************************************************************
3 * Module Name: psxface - Parser external interfaces
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2010, Intel Corp.
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12 * modification, are permitted provided that the following conditions
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20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
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44 #include <acpi/acpi.h>
51 #define _COMPONENT ACPI_PARSER
52 ACPI_MODULE_NAME("psxface")
54 /* Local Prototypes */
55 static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
57 static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
60 acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
62 /*******************************************************************************
64 * FUNCTION: acpi_debug_trace
66 * PARAMETERS: method_name - Valid ACPI name string
67 * debug_level - Optional level mask. 0 to use default
68 * debug_layer - Optional layer mask. 0 to use default
69 * Flags - bit 1: one shot(1) or persistent(0)
73 * DESCRIPTION: External interface to enable debug tracing during control
76 ******************************************************************************/
79 acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
83 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
84 if (ACPI_FAILURE(status)) {
88 /* TBDs: Validate name, allow full path or just nameseg */
90 acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
91 acpi_gbl_trace_flags = flags;
94 acpi_gbl_trace_dbg_level = debug_level;
97 acpi_gbl_trace_dbg_layer = debug_layer;
100 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
104 /*******************************************************************************
106 * FUNCTION: acpi_ps_start_trace
108 * PARAMETERS: Info - Method info struct
112 * DESCRIPTION: Start control method execution trace
114 ******************************************************************************/
116 static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
120 ACPI_FUNCTION_ENTRY();
122 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
123 if (ACPI_FAILURE(status)) {
127 if ((!acpi_gbl_trace_method_name) ||
128 (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
132 acpi_gbl_original_dbg_level = acpi_dbg_level;
133 acpi_gbl_original_dbg_layer = acpi_dbg_layer;
135 acpi_dbg_level = 0x00FFFFFF;
136 acpi_dbg_layer = ACPI_UINT32_MAX;
138 if (acpi_gbl_trace_dbg_level) {
139 acpi_dbg_level = acpi_gbl_trace_dbg_level;
141 if (acpi_gbl_trace_dbg_layer) {
142 acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
146 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
149 /*******************************************************************************
151 * FUNCTION: acpi_ps_stop_trace
153 * PARAMETERS: Info - Method info struct
157 * DESCRIPTION: Stop control method execution trace
159 ******************************************************************************/
161 static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
165 ACPI_FUNCTION_ENTRY();
167 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
168 if (ACPI_FAILURE(status)) {
172 if ((!acpi_gbl_trace_method_name) ||
173 (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
177 /* Disable further tracing if type is one-shot */
179 if (acpi_gbl_trace_flags & 1) {
180 acpi_gbl_trace_method_name = 0;
181 acpi_gbl_trace_dbg_level = 0;
182 acpi_gbl_trace_dbg_layer = 0;
185 acpi_dbg_level = acpi_gbl_original_dbg_level;
186 acpi_dbg_layer = acpi_gbl_original_dbg_layer;
189 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
192 /*******************************************************************************
194 * FUNCTION: acpi_ps_execute_method
196 * PARAMETERS: Info - Method info block, contains:
197 * Node - Method Node to execute
198 * obj_desc - Method object
199 * Parameters - List of parameters to pass to the method,
200 * terminated by NULL. Params itself may be
201 * NULL if no parameters are being passed.
202 * return_object - Where to put method's return value (if
203 * any). If NULL, no value is returned.
204 * parameter_type - Type of Parameter list
205 * return_object - Where to put method's return value (if
206 * any). If NULL, no value is returned.
207 * pass_number - Parse or execute pass
211 * DESCRIPTION: Execute a control method
213 ******************************************************************************/
215 acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
218 union acpi_parse_object *op;
219 struct acpi_walk_state *walk_state;
221 ACPI_FUNCTION_TRACE(ps_execute_method);
223 /* Quick validation of DSDT header */
225 acpi_tb_check_dsdt_header();
227 /* Validate the Info and method Node */
229 if (!info || !info->resolved_node) {
230 return_ACPI_STATUS(AE_NULL_ENTRY);
233 /* Init for new method, wait on concurrency semaphore */
236 acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
238 if (ACPI_FAILURE(status)) {
239 return_ACPI_STATUS(status);
243 * The caller "owns" the parameters, so give each one an extra reference
245 acpi_ps_update_parameter_list(info, REF_INCREMENT);
247 /* Begin tracing if requested */
249 acpi_ps_start_trace(info);
252 * Execute the method. Performs parse simultaneously
254 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
255 "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
256 info->resolved_node->name.ascii, info->resolved_node,
259 /* Create and init a Root Node */
261 op = acpi_ps_create_scope_op();
263 status = AE_NO_MEMORY;
267 /* Create and initialize a new walk state */
269 info->pass_number = ACPI_IMODE_EXECUTE;
271 acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
274 status = AE_NO_MEMORY;
278 status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
279 info->obj_desc->method.aml_start,
280 info->obj_desc->method.aml_length, info,
282 if (ACPI_FAILURE(status)) {
283 acpi_ds_delete_walk_state(walk_state);
287 if (info->obj_desc->method.flags & AOPOBJ_MODULE_LEVEL) {
288 walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
291 /* Invoke an internal method if necessary */
293 if (info->obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
295 info->obj_desc->method.extra.implementation(walk_state);
296 info->return_object = walk_state->return_desc;
300 acpi_ds_scope_stack_clear(walk_state);
301 acpi_ps_cleanup_scope(&walk_state->parser_state);
302 acpi_ds_terminate_control_method(walk_state->method_desc,
304 acpi_ds_delete_walk_state(walk_state);
309 * Start method evaluation with an implicit return of zero.
310 * This is done for Windows compatibility.
312 if (acpi_gbl_enable_interpreter_slack) {
313 walk_state->implicit_return_obj =
314 acpi_ut_create_integer_object((u64) 0);
315 if (!walk_state->implicit_return_obj) {
316 status = AE_NO_MEMORY;
317 acpi_ds_delete_walk_state(walk_state);
324 status = acpi_ps_parse_aml(walk_state);
326 /* walk_state was deleted by parse_aml */
329 acpi_ps_delete_parse_tree(op);
331 /* End optional tracing */
333 acpi_ps_stop_trace(info);
335 /* Take away the extra reference that we gave the parameters above */
337 acpi_ps_update_parameter_list(info, REF_DECREMENT);
339 /* Exit now if error above */
341 if (ACPI_FAILURE(status)) {
342 return_ACPI_STATUS(status);
346 * If the method has returned an object, signal this to the caller with
347 * a control exception code
349 if (info->return_object) {
350 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
351 info->return_object));
352 ACPI_DUMP_STACK_ENTRY(info->return_object);
354 status = AE_CTRL_RETURN_VALUE;
357 return_ACPI_STATUS(status);
360 /*******************************************************************************
362 * FUNCTION: acpi_ps_update_parameter_list
364 * PARAMETERS: Info - See struct acpi_evaluate_info
365 * (Used: parameter_type and Parameters)
366 * Action - Add or Remove reference
370 * DESCRIPTION: Update reference count on all method parameter objects
372 ******************************************************************************/
375 acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
379 if (info->parameters) {
381 /* Update reference count for each parameter */
383 for (i = 0; info->parameters[i]; i++) {
385 /* Ignore errors, just do them all */
387 (void)acpi_ut_update_object_reference(info->