InPortDeclAST.py revision 6999
16657Snate@binkert.org# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 26657Snate@binkert.org# Copyright (c) 2009 The Hewlett-Packard Development Company 36657Snate@binkert.org# All rights reserved. 46657Snate@binkert.org# 56657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 66657Snate@binkert.org# modification, are permitted provided that the following conditions are 76657Snate@binkert.org# met: redistributions of source code must retain the above copyright 86657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 96657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 106657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 116657Snate@binkert.org# documentation and/or other materials provided with the distribution; 126657Snate@binkert.org# neither the name of the copyright holders nor the names of its 136657Snate@binkert.org# contributors may be used to endorse or promote products derived from 146657Snate@binkert.org# this software without specific prior written permission. 156657Snate@binkert.org# 166657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276657Snate@binkert.org 286657Snate@binkert.orgfrom slicc.ast.DeclAST import DeclAST 296657Snate@binkert.orgfrom slicc.ast.TypeAST import TypeAST 306657Snate@binkert.orgfrom slicc.symbols import Func, Type, Var 316657Snate@binkert.org 326657Snate@binkert.orgclass InPortDeclAST(DeclAST): 336657Snate@binkert.org def __init__(self, slicc, ident, msg_type, var_expr, pairs, statements): 346657Snate@binkert.org super(InPortDeclAST, self).__init__(slicc, pairs) 356657Snate@binkert.org 366657Snate@binkert.org self.ident = ident 376657Snate@binkert.org self.msg_type = msg_type 386657Snate@binkert.org self.var_expr = var_expr 396657Snate@binkert.org self.statements = statements 406657Snate@binkert.org self.queue_type = TypeAST(slicc, "InPort") 416657Snate@binkert.org 426657Snate@binkert.org def __repr__(self): 436657Snate@binkert.org return "[InPortDecl: %s]" % self.ident 446657Snate@binkert.org 456657Snate@binkert.org def generate(self): 466657Snate@binkert.org symtab = self.symtab 476657Snate@binkert.org void_type = symtab.find("void", Type) 486657Snate@binkert.org 496999Snate@binkert.org code = self.slicc.codeFormatter() 506657Snate@binkert.org queue_type = self.var_expr.generate(code) 516657Snate@binkert.org if not queue_type.isInPort: 526657Snate@binkert.org self.error("The inport queue's type must have the 'inport' " + \ 536657Snate@binkert.org "attribute. Type '%s' does not have this attribute.", 546657Snate@binkert.org queue_type) 556657Snate@binkert.org 566657Snate@binkert.org type = self.queue_type.type 576657Snate@binkert.org in_port = Var(self.symtab, self.ident, self.location, type, str(code), 586657Snate@binkert.org self.pairs) 596657Snate@binkert.org symtab.newSymbol(in_port) 606657Snate@binkert.org 616657Snate@binkert.org symtab.pushFrame() 626657Snate@binkert.org param_types = [] 636657Snate@binkert.org 646657Snate@binkert.org # Check for Event 656657Snate@binkert.org type = symtab.find("Event", Type) 666657Snate@binkert.org if type is None: 676657Snate@binkert.org self.error("in_port decls require 'Event' enumeration defined") 686657Snate@binkert.org param_types.append(type) 696657Snate@binkert.org 706657Snate@binkert.org # Check for Address 716657Snate@binkert.org type = symtab.find("Address", Type) 726657Snate@binkert.org if type is None: 736657Snate@binkert.org self.error("in_port decls require 'Address' type to be defined") 746657Snate@binkert.org 756657Snate@binkert.org param_types.append(type) 766657Snate@binkert.org 776657Snate@binkert.org # Add the trigger method - FIXME, this is a bit dirty 786657Snate@binkert.org pairs = { "external" : "yes" } 796657Snate@binkert.org func = Func(self.symtab, "trigger", self.location, void_type, 806657Snate@binkert.org param_types, [], "", pairs, None) 816657Snate@binkert.org symtab.newSymbol(func) 826657Snate@binkert.org 836657Snate@binkert.org param_types = [] 846657Snate@binkert.org # Check for Event2 856657Snate@binkert.org type = symtab.find("Event", Type) 866657Snate@binkert.org if type is None: 876657Snate@binkert.org self.error("in_port decls require 'Event' enumeration") 886657Snate@binkert.org 896657Snate@binkert.org param_types.append(type) 906657Snate@binkert.org 916657Snate@binkert.org # Check for Address2 926657Snate@binkert.org type = symtab.find("Address", Type) 936657Snate@binkert.org if type is None: 946657Snate@binkert.org self.error("in_port decls require 'Address' type to be defined") 956657Snate@binkert.org 966657Snate@binkert.org param_types.append(type) 976657Snate@binkert.org 986657Snate@binkert.org # Add the doubleTrigger method - this hack supports tiggering 996657Snate@binkert.org # two simulateous events 1006657Snate@binkert.org # 1016657Snate@binkert.org # The key is that the second transistion cannot fail because 1026657Snate@binkert.org # the first event cannot be undone therefore you must do some 1036657Snate@binkert.org # checks before calling double trigger to ensure that won't 1046657Snate@binkert.org # happen 1056657Snate@binkert.org func = Func(self.symtab, "doubleTrigger", self.location, void_type, 1066657Snate@binkert.org param_types, [], "", pairs, None) 1076657Snate@binkert.org symtab.newSymbol(func) 1086657Snate@binkert.org 1096657Snate@binkert.org # Add the continueProcessing method - this hack supports 1106657Snate@binkert.org # messages that don't trigger events 1116657Snate@binkert.org func = Func(self.symtab, "continueProcessing", self.location, 1126657Snate@binkert.org void_type, [], [], "", pairs, None) 1136657Snate@binkert.org symtab.newSymbol(func) 1146657Snate@binkert.org 1156657Snate@binkert.org if self.statements is not None: 1166999Snate@binkert.org rcode = self.slicc.codeFormatter() 1176657Snate@binkert.org rcode.indent() 1186657Snate@binkert.org rcode.indent() 1196657Snate@binkert.org self.statements.generate(rcode, None) 1206657Snate@binkert.org in_port["c_code_in_port"] = str(rcode) 1216657Snate@binkert.org symtab.popFrame() 1226657Snate@binkert.org 1236657Snate@binkert.org # Add port to state machine 1246657Snate@binkert.org machine = symtab.state_machine 1256657Snate@binkert.org if machine is None: 1266657Snate@binkert.org self.error("InPort declaration not part of a machine.") 1276657Snate@binkert.org 1286657Snate@binkert.org machine.addInPort(in_port) 129