110967Sdavid.hashe@amd.com# Copyright (c) 2013 Advanced Micro Devices, Inc. 26657Snate@binkert.org# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 36657Snate@binkert.org# Copyright (c) 2009 The Hewlett-Packard Development Company 46657Snate@binkert.org# All rights reserved. 56657Snate@binkert.org# 66657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 76657Snate@binkert.org# modification, are permitted provided that the following conditions are 86657Snate@binkert.org# met: redistributions of source code must retain the above copyright 96657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 106657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 116657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 126657Snate@binkert.org# documentation and/or other materials provided with the distribution; 136657Snate@binkert.org# neither the name of the copyright holders nor the names of its 146657Snate@binkert.org# contributors may be used to endorse or promote products derived from 156657Snate@binkert.org# this software without specific prior written permission. 166657Snate@binkert.org# 176657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 186657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 196657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 206657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 216657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 226657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 236657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 246657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 256657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 266657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 276657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 286657Snate@binkert.org 296657Snate@binkert.orgfrom slicc.ast.StatementAST import StatementAST 306657Snate@binkert.orgfrom slicc.symbols import Var 316657Snate@binkert.org 326657Snate@binkert.orgclass PeekStatementAST(StatementAST): 336863Sdrh5@cs.wisc.edu def __init__(self, slicc, queue_name, type_ast, pairs, statements, method): 346863Sdrh5@cs.wisc.edu super(PeekStatementAST, self).__init__(slicc, pairs) 356657Snate@binkert.org 366657Snate@binkert.org self.queue_name = queue_name 376657Snate@binkert.org self.type_ast = type_ast 386657Snate@binkert.org self.statements = statements 396657Snate@binkert.org self.method = method 406657Snate@binkert.org 416657Snate@binkert.org def __repr__(self): 426657Snate@binkert.org return "[PeekStatementAST: %r queue_name: %r type: %r %r]" % \ 436657Snate@binkert.org (self.method, self.queue_name, self.type_ast, self.statements) 446657Snate@binkert.org 456657Snate@binkert.org def generate(self, code, return_type): 466657Snate@binkert.org self.symtab.pushFrame() 476657Snate@binkert.org 486657Snate@binkert.org msg_type = self.type_ast.type 496657Snate@binkert.org 506657Snate@binkert.org # Add new local var to symbol table 516657Snate@binkert.org var = Var(self.symtab, "in_msg", self.location, msg_type, "(*in_msg_ptr)", 526657Snate@binkert.org self.pairs) 536657Snate@binkert.org self.symtab.newSymbol(var) 546657Snate@binkert.org 556657Snate@binkert.org # Check the queue type 566657Snate@binkert.org self.queue_name.assertType("InPort") 576657Snate@binkert.org 586657Snate@binkert.org # Declare the new "in_msg_ptr" variable 5910967Sdavid.hashe@amd.com mtid = msg_type.c_ident 606657Snate@binkert.org qcode = self.queue_name.var.code 616657Snate@binkert.org code(''' 626657Snate@binkert.org{ 637007Snate@binkert.org // Declare message 648641Snate@binkert.org const $mtid* in_msg_ptr M5_VAR_USED; 656657Snate@binkert.org in_msg_ptr = dynamic_cast<const $mtid *>(($qcode).${{self.method}}()); 6610963Sdavid.hashe@amd.com if (in_msg_ptr == NULL) { 6710963Sdavid.hashe@amd.com // If the cast fails, this is the wrong inport (wrong message type). 6810963Sdavid.hashe@amd.com // Throw an exception, and the caller will decide to either try a 6910963Sdavid.hashe@amd.com // different inport or punt. 7010963Sdavid.hashe@amd.com throw RejectException(); 7110963Sdavid.hashe@amd.com } 726657Snate@binkert.org''') 737007Snate@binkert.org 7413675Sandreas.sandberg@arm.com if "block_on" in self.pairs: 756863Sdrh5@cs.wisc.edu address_field = self.pairs['block_on'] 766863Sdrh5@cs.wisc.edu code(''' 7710231Ssteve.reinhardt@amd.com if (m_is_blocking && 7810231Ssteve.reinhardt@amd.com (m_block_map.count(in_msg_ptr->m_$address_field) == 1) && 7910231Ssteve.reinhardt@amd.com (m_block_map[in_msg_ptr->m_$address_field] != &$qcode)) { 8011111Snilay@cs.wisc.edu $qcode.delayHead(clockEdge(), cyclesToTicks(Cycles(1))); 816863Sdrh5@cs.wisc.edu continue; 826863Sdrh5@cs.wisc.edu } 836863Sdrh5@cs.wisc.edu ''') 846657Snate@binkert.org 8513675Sandreas.sandberg@arm.com if "wake_up" in self.pairs: 867567SBrad.Beckmann@amd.com address_field = self.pairs['wake_up'] 877567SBrad.Beckmann@amd.com code(''' 887567SBrad.Beckmann@amd.com if (m_waiting_buffers.count(in_msg_ptr->m_$address_field) > 0) { 897567SBrad.Beckmann@amd.com wakeUpBuffers(in_msg_ptr->m_$address_field); 907567SBrad.Beckmann@amd.com } 917567SBrad.Beckmann@amd.com ''') 927567SBrad.Beckmann@amd.com 936657Snate@binkert.org # The other statements 946657Snate@binkert.org self.statements.generate(code, return_type) 956657Snate@binkert.org self.symtab.popFrame() 966657Snate@binkert.org code("}") 976657Snate@binkert.org 986657Snate@binkert.org def findResources(self, resources): 996657Snate@binkert.org self.statements.findResources(resources) 100