- 根目录:
- drivers
- acpi
- acpica
- psxface.c
/******************************************************************************
*
* Module Name: psxface - Parser external interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2012, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "actables.h"
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME("psxface")
/* Local Prototypes */
static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
/*******************************************************************************
*
* FUNCTION: acpi_debug_trace
*
* PARAMETERS: method_name - Valid ACPI name string
* debug_level - Optional level mask. 0 to use default
* debug_layer - Optional layer mask. 0 to use default
* Flags - bit 1: one shot(1) or persistent(0)
*
* RETURN: Status
*
* DESCRIPTION: External interface to enable debug tracing during control
* method execution
*
******************************************************************************/
acpi_status
acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
{
acpi_status status;
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return (status);
}
/* TBDs: Validate name, allow full path or just nameseg */
acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
acpi_gbl_trace_flags = flags;
if (debug_level) {
acpi_gbl_trace_dbg_level = debug_level;
}
if (debug_layer) {
acpi_gbl_trace_dbg_layer = debug_layer;
}
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_start_trace
*
* PARAMETERS: Info - Method info struct
*
* RETURN: None
*
* DESCRIPTION: Start control method execution trace
*
******************************************************************************/
static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
{
acpi_status status;
ACPI_FUNCTION_ENTRY();
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return;
}
if ((!acpi_gbl_trace_method_name) ||
(acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
goto exit;
}
acpi_gbl_original_dbg_level = acpi_dbg_level;
acpi_gbl_original_dbg_layer = acpi_dbg_layer;
acpi_dbg_level = 0x00FFFFFF;
acpi_dbg_layer = ACPI_UINT32_MAX;
if (acpi_gbl_trace_dbg_level) {
acpi_dbg_level = acpi_gbl_trace_dbg_level;
}
if (acpi_gbl_trace_dbg_layer) {
acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
}
exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_stop_trace
*
* PARAMETERS: Info - Method info struct
*
* RETURN: None
*
* DESCRIPTION: Stop control method execution trace
*
******************************************************************************/
static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
{
acpi_status status;
ACPI_FUNCTION_ENTRY();
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return;
}
if ((!acpi_gbl_trace_method_name) ||
(acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
goto exit;
}
/* Disable further tracing if type is one-shot */
if (acpi_gbl_trace_flags & 1) {
acpi_gbl_trace_method_name = 0;
acpi_gbl_trace_dbg_level = 0;
acpi_gbl_trace_dbg_layer = 0;
}
acpi_dbg_level = acpi_gbl_original_dbg_level;
acpi_dbg_layer = acpi_gbl_original_dbg_layer;
exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_execute_method
*
* PARAMETERS: Info - Method info block, contains:
* Node - Method Node to execute
* obj_desc - Method object
* Parameters - List of parameters to pass to the method,
* terminated by NULL. Params itself may be
* NULL if no parameters are being passed.
* return_object - Where to put method's return value (if
* any). If NULL, no value is returned.
* parameter_type - Type of Parameter list
* return_object - Where to put method's return value (if
* any). If NULL, no value is returned.
* pass_number - Parse or execute pass
*
* RETURN: Status
*
* DESCRIPTION: Execute a control method
*
******************************************************************************/
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
{
acpi_status status;
union acpi_parse_object *op;
struct acpi_walk_state *walk_state;
ACPI_FUNCTION_TRACE(ps_execute_method);
/* Quick validation of DSDT header */
acpi_tb_check_dsdt_header();
/* Validate the Info and method Node */
if (!info || !info->resolved_node) {
return_ACPI_STATUS(AE_NULL_ENTRY);
}
/* Init for new method, wait on concurrency semaphore */
status =
acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
NULL);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* The caller "owns" the parameters, so give each one an extra reference
*/
acpi_ps_update_parameter_list(info, REF_INCREMENT);
/* Begin tracing if requested */
acpi_ps_start_trace(info);
/*
* Execute the method. Performs parse simultaneously
*/
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
"**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
info->resolved_node->name.ascii, info->resolved_node,
info->obj_desc));
/* Create and init a Root Node */
op = acpi_ps_create_scope_op();
if (!op) {
status = AE_NO_MEMORY;
goto cleanup;
}
/* Create and initialize a new walk state */
info->pass_number = ACPI_IMODE_EXECUTE;
walk_state =
acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
NULL, NULL);
if (!walk_state) {
status = AE_NO_MEMORY;
goto cleanup;
}
status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
info->obj_desc->method.aml_start,
info->obj_desc->method.aml_length, info,
info->pass_number);
if (ACPI_FAILURE(status)) {
acpi_ds_delete_walk_state(walk_state);
goto cleanup;
}
if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
}
/* Invoke an internal method if necessary */
if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
status =
info->obj_desc->method.dispatch.implementation(walk_state);
info->return_object = walk_state->return_desc;
/* Cleanup states */
acpi_ds_scope_stack_clear(walk_state);
acpi_ps_cleanup_scope(&walk_state->parser_state);
acpi_ds_terminate_control_method(walk_state->method_desc,
walk_state);
acpi_ds_delete_walk_state(walk_state);
goto cleanup;
}
/*
* Start method evaluation with an implicit return of zero.
* This is done for Windows compatibility.
*/
if (acpi_gbl_enable_interpreter_slack) {
walk_state->implicit_return_obj =
acpi_ut_create_integer_object((u64) 0);
if (!walk_state->implicit_return_obj) {
status = AE_NO_MEMORY;
acpi_ds_delete_walk_state(walk_state);
goto cleanup;
}
}
/* Parse the AML */
status = acpi_ps_parse_aml(walk_state);
/* walk_state was deleted by parse_aml */
cleanup:
acpi_ps_delete_parse_tree(op);
/* End optional tracing */
acpi_ps_stop_trace(info);
/* Take away the extra reference that we gave the parameters above */
acpi_ps_update_parameter_list(info, REF_DECREMENT);
/* Exit now if error above */
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 ObjDesc=%p\n",
info->return_object));
ACPI_DUMP_STACK_ENTRY(info->return_object);
status = AE_CTRL_RETURN_VALUE;
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_update_parameter_list
*
* PARAMETERS: Info - See struct acpi_evaluate_info
* (Used: parameter_type and Parameters)
* Action - Add or Remove reference
*
* RETURN: Status
*
* DESCRIPTION: Update reference count on all method parameter objects
*
******************************************************************************/
static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
{
u32 i;
if (info->parameters) {
/* Update reference count for each parameter */
for (i = 0; info->parameters[i]; i++) {
/* Ignore errors, just do them all */
(void)acpi_ut_update_object_reference(info->
parameters[i],
action);
}
}
}