390 lines
11 KiB
C
390 lines
11 KiB
C
/******************************************************************************
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*
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* Module Name: psxface - Parser external interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acparser.h>
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#include <acpi/acdispat.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME("psxface")
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/* Local Prototypes */
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static void acpi_ps_start_trace(struct acpi_parameter_info *info);
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static void acpi_ps_stop_trace(struct acpi_parameter_info *info);
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static acpi_status acpi_ps_execute_pass(struct acpi_parameter_info *info);
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static void
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acpi_ps_update_parameter_list(struct acpi_parameter_info *info, u16 action);
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/*******************************************************************************
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*
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* FUNCTION: acpi_debug_trace
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*
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* PARAMETERS: method_name - Valid ACPI name string
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* debug_level - Optional level mask. 0 to use default
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* debug_layer - Optional layer mask. 0 to use default
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* Flags - bit 1: one shot(1) or persistent(0)
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*
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* RETURN: Status
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*
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* DESCRIPTION: External interface to enable debug tracing during control
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* method execution
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*
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******************************************************************************/
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acpi_status
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acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
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{
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acpi_status status;
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* TBDs: Validate name, allow full path or just nameseg */
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acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
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acpi_gbl_trace_flags = flags;
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if (debug_level) {
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acpi_gbl_trace_dbg_level = debug_level;
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}
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if (debug_layer) {
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acpi_gbl_trace_dbg_layer = debug_layer;
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}
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_start_trace
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*
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* PARAMETERS: Info - Method info struct
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*
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* RETURN: None
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*
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* DESCRIPTION: Start control method execution trace
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*
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******************************************************************************/
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static void acpi_ps_start_trace(struct acpi_parameter_info *info)
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{
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acpi_status status;
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ACPI_FUNCTION_ENTRY();
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return;
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}
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if ((!acpi_gbl_trace_method_name) ||
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(acpi_gbl_trace_method_name != info->node->name.integer)) {
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goto exit;
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}
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acpi_gbl_original_dbg_level = acpi_dbg_level;
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acpi_gbl_original_dbg_layer = acpi_dbg_layer;
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acpi_dbg_level = 0x00FFFFFF;
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acpi_dbg_layer = ACPI_UINT32_MAX;
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if (acpi_gbl_trace_dbg_level) {
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acpi_dbg_level = acpi_gbl_trace_dbg_level;
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}
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if (acpi_gbl_trace_dbg_layer) {
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acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
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}
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exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_stop_trace
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*
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* PARAMETERS: Info - Method info struct
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*
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* RETURN: None
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*
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* DESCRIPTION: Stop control method execution trace
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*
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******************************************************************************/
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static void acpi_ps_stop_trace(struct acpi_parameter_info *info)
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{
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acpi_status status;
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ACPI_FUNCTION_ENTRY();
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return;
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}
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if ((!acpi_gbl_trace_method_name) ||
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(acpi_gbl_trace_method_name != info->node->name.integer)) {
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goto exit;
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}
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/* Disable further tracing if type is one-shot */
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if (acpi_gbl_trace_flags & 1) {
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acpi_gbl_trace_method_name = 0;
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acpi_gbl_trace_dbg_level = 0;
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acpi_gbl_trace_dbg_layer = 0;
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}
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acpi_dbg_level = acpi_gbl_original_dbg_level;
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acpi_dbg_layer = acpi_gbl_original_dbg_layer;
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exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_execute_method
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*
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* PARAMETERS: Info - Method info block, contains:
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* Node - Method Node to execute
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* obj_desc - Method object
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* Parameters - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* parameter_type - Type of Parameter list
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* pass_number - Parse or execute pass
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a control method
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*
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******************************************************************************/
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acpi_status acpi_ps_execute_method(struct acpi_parameter_info *info)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("ps_execute_method");
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/* Validate the Info and method Node */
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if (!info || !info->node) {
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return_ACPI_STATUS(AE_NULL_ENTRY);
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}
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/* Init for new method, wait on concurrency semaphore */
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status =
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acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* The caller "owns" the parameters, so give each one an extra
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* reference
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*/
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acpi_ps_update_parameter_list(info, REF_INCREMENT);
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/* Begin tracing if requested */
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acpi_ps_start_trace(info);
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/*
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* 1) Perform the first pass parse of the method to enter any
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* named objects that it creates into the namespace
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
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"**** Begin Method Parse **** Entry=%p obj=%p\n",
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info->node, info->obj_desc));
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info->pass_number = 1;
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status = acpi_ps_execute_pass(info);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/*
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* 2) Execute the method. Performs second pass parse simultaneously
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
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"**** Begin Method Execution **** Entry=%p obj=%p\n",
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info->node, info->obj_desc));
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info->pass_number = 3;
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status = acpi_ps_execute_pass(info);
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cleanup:
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/* End optional tracing */
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acpi_ps_stop_trace(info);
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/* Take away the extra reference that we gave the parameters above */
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acpi_ps_update_parameter_list(info, REF_DECREMENT);
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/* Exit now if error above */
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* If the method has returned an object, signal this to the caller with
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* a control exception code
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*/
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if (info->return_object) {
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
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"Method returned obj_desc=%p\n",
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info->return_object));
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ACPI_DUMP_STACK_ENTRY(info->return_object);
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status = AE_CTRL_RETURN_VALUE;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_update_parameter_list
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*
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* PARAMETERS: Info - See struct acpi_parameter_info
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* (Used: parameter_type and Parameters)
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* Action - Add or Remove reference
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*
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* RETURN: Status
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*
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* DESCRIPTION: Update reference count on all method parameter objects
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*
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******************************************************************************/
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static void
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acpi_ps_update_parameter_list(struct acpi_parameter_info *info, u16 action)
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{
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acpi_native_uint i;
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if ((info->parameter_type == ACPI_PARAM_ARGS) && (info->parameters)) {
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/* Update reference count for each parameter */
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for (i = 0; info->parameters[i]; i++) {
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/* Ignore errors, just do them all */
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(void)acpi_ut_update_object_reference(info->
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parameters[i],
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action);
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_execute_pass
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*
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* PARAMETERS: Info - See struct acpi_parameter_info
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* (Used: pass_number, Node, and obj_desc)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Single AML pass: Parse or Execute a control method
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*
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******************************************************************************/
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static acpi_status acpi_ps_execute_pass(struct acpi_parameter_info *info)
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{
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acpi_status status;
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union acpi_parse_object *op;
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struct acpi_walk_state *walk_state;
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ACPI_FUNCTION_TRACE("ps_execute_pass");
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/* Create and init a Root Node */
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op = acpi_ps_create_scope_op();
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if (!op) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Create and initialize a new walk state */
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walk_state =
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acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
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NULL, NULL);
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if (!walk_state) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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status = acpi_ds_init_aml_walk(walk_state, op, info->node,
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info->obj_desc->method.aml_start,
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info->obj_desc->method.aml_length,
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info->pass_number == 1 ? NULL : info,
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info->pass_number);
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if (ACPI_FAILURE(status)) {
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acpi_ds_delete_walk_state(walk_state);
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goto cleanup;
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}
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/* Parse the AML */
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status = acpi_ps_parse_aml(walk_state);
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/* Walk state was deleted by parse_aml */
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cleanup:
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acpi_ps_delete_parse_tree(op);
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return_ACPI_STATUS(status);
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}
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