/****************************************************************************** * * Module Name: psxface - Parser external interfaces * *****************************************************************************/ /* * Copyright (C) 2000 - 2005, R. Byron Moore * 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 #include #include #include #include #define _COMPONENT ACPI_PARSER ACPI_MODULE_NAME ("psxface") /******************************************************************************* * * FUNCTION: acpi_psx_execute * * PARAMETERS: Info->Node - A method object containing both the AML * address and length. * **Params - List of parameters to pass to method, * terminated by NULL. Params itself may be * NULL if no parameters are being passed. * **return_obj_desc - Return object from execution of the * method. * * RETURN: Status * * DESCRIPTION: Execute a control method * ******************************************************************************/ acpi_status acpi_psx_execute ( struct acpi_parameter_info *info) { acpi_status status; union acpi_operand_object *obj_desc; u32 i; union acpi_parse_object *op; struct acpi_walk_state *walk_state; ACPI_FUNCTION_TRACE ("psx_execute"); /* Validate the Node and get the attached object */ if (!info || !info->node) { return_ACPI_STATUS (AE_NULL_ENTRY); } obj_desc = acpi_ns_get_attached_object (info->node); if (!obj_desc) { return_ACPI_STATUS (AE_NULL_OBJECT); } /* Init for new method, wait on concurrency semaphore */ status = acpi_ds_begin_method_execution (info->node, obj_desc, NULL); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } if ((info->parameter_type == ACPI_PARAM_ARGS) && (info->parameters)) { /* * The caller "owns" the parameters, so give each one an extra * reference */ for (i = 0; info->parameters[i]; i++) { acpi_ut_add_reference (info->parameters[i]); } } /* * 1) Perform the first pass parse of the method to enter any * named objects that it creates into the namespace */ ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Begin Method Parse **** Entry=%p obj=%p\n", info->node, obj_desc)); /* Create and init a Root Node */ op = acpi_ps_create_scope_op (); if (!op) { status = AE_NO_MEMORY; goto cleanup1; } /* * 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. */ obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD); /* Create and initialize a new walk state */ walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id, NULL, NULL, NULL); if (!walk_state) { status = AE_NO_MEMORY; goto cleanup2; } status = acpi_ds_init_aml_walk (walk_state, op, info->node, obj_desc->method.aml_start, obj_desc->method.aml_length, NULL, 1); if (ACPI_FAILURE (status)) { goto cleanup3; } /* Parse the AML */ status = acpi_ps_parse_aml (walk_state); acpi_ps_delete_parse_tree (op); if (ACPI_FAILURE (status)) { goto cleanup1; /* Walk state is already deleted */ } /* * 2) Execute the method. Performs second pass parse simultaneously */ ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Begin Method Execution **** Entry=%p obj=%p\n", info->node, obj_desc)); /* Create and init a Root Node */ op = acpi_ps_create_scope_op (); if (!op) { status = AE_NO_MEMORY; goto cleanup1; } /* Init new op with the method name and pointer back to the NS node */ acpi_ps_set_name (op, info->node->name.integer); op->common.node = info->node; /* Create and initialize a new walk state */ walk_state = acpi_ds_create_walk_state (0, NULL, NULL, NULL); if (!walk_state) { status = AE_NO_MEMORY; goto cleanup2; } status = acpi_ds_init_aml_walk (walk_state, op, info->node, obj_desc->method.aml_start, obj_desc->method.aml_length, info, 3); if (ACPI_FAILURE (status)) { goto cleanup3; } /* * The walk of the parse tree is where we actually execute the method */ status = acpi_ps_parse_aml (walk_state); goto cleanup2; /* Walk state already deleted */ cleanup3: acpi_ds_delete_walk_state (walk_state); cleanup2: acpi_ps_delete_parse_tree (op); cleanup1: if ((info->parameter_type == ACPI_PARAM_ARGS) && (info->parameters)) { /* Take away the extra reference that we gave the parameters above */ for (i = 0; info->parameters[i]; i++) { /* Ignore errors, just do them all */ (void) acpi_ut_update_object_reference (info->parameters[i], REF_DECREMENT); } } 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 obj_desc=%p\n", info->return_object)); ACPI_DUMP_STACK_ENTRY (info->return_object); status = AE_CTRL_RETURN_VALUE; } return_ACPI_STATUS (status); }