io_device.cc revision 10694
16313Sgblack@eecs.umich.edu/* 26313Sgblack@eecs.umich.edu * Copyright (c) 2012 ARM Limited 36313Sgblack@eecs.umich.edu * All rights reserved. 46313Sgblack@eecs.umich.edu * 56313Sgblack@eecs.umich.edu * The license below extends only to copyright in the software and shall 66313Sgblack@eecs.umich.edu * not be construed as granting a license to any other intellectual 76313Sgblack@eecs.umich.edu * property including but not limited to intellectual property relating 86313Sgblack@eecs.umich.edu * to a hardware implementation of the functionality of the software 96313Sgblack@eecs.umich.edu * licensed hereunder. You may use the software subject to the license 106313Sgblack@eecs.umich.edu * terms below provided that you ensure that this notice is replicated 116313Sgblack@eecs.umich.edu * unmodified and in its entirety in all distributions of the software, 126313Sgblack@eecs.umich.edu * modified or unmodified, in source code or in binary form. 136313Sgblack@eecs.umich.edu * 146313Sgblack@eecs.umich.edu * Copyright (c) 2006 The Regents of The University of Michigan 156313Sgblack@eecs.umich.edu * All rights reserved. 166313Sgblack@eecs.umich.edu * 176313Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 186313Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 196313Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 206313Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 216313Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 226313Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 236313Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 246313Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 256313Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 266313Sgblack@eecs.umich.edu * this software without specific prior written permission. 276313Sgblack@eecs.umich.edu * 286313Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 296313Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 306313Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 317678Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 327678Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 336313Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 346330Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 356313Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 367680Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 376313Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 386313Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 396313Sgblack@eecs.umich.edu * 406313Sgblack@eecs.umich.edu * Authors: Ali Saidi 416313Sgblack@eecs.umich.edu * Nathan Binkert 426678Sgblack@eecs.umich.edu */ 436313Sgblack@eecs.umich.edu 446330Sgblack@eecs.umich.edu#include "base/trace.hh" 456330Sgblack@eecs.umich.edu#include "debug/AddrRanges.hh" 466330Sgblack@eecs.umich.edu#include "dev/io_device.hh" 476330Sgblack@eecs.umich.edu#include "sim/system.hh" 486330Sgblack@eecs.umich.edu 496313Sgblack@eecs.umich.eduPioPort::PioPort(PioDevice *dev) 506313Sgblack@eecs.umich.edu : SimpleTimingPort(dev->name() + ".pio", dev), device(dev) 516313Sgblack@eecs.umich.edu{ 526678Sgblack@eecs.umich.edu} 536313Sgblack@eecs.umich.edu 546330Sgblack@eecs.umich.eduTick 556330Sgblack@eecs.umich.eduPioPort::recvAtomic(PacketPtr pkt) 566330Sgblack@eecs.umich.edu{ 576330Sgblack@eecs.umich.edu // @todo: We need to pay for this and not just zero it out 586330Sgblack@eecs.umich.edu pkt->headerDelay = pkt->payloadDelay = 0; 596330Sgblack@eecs.umich.edu 606330Sgblack@eecs.umich.edu const Tick delay(pkt->isRead() ? device->read(pkt) : device->write(pkt)); 616330Sgblack@eecs.umich.edu assert(pkt->isResponse() || pkt->isError()); 626330Sgblack@eecs.umich.edu return delay; 636330Sgblack@eecs.umich.edu} 646330Sgblack@eecs.umich.edu 656330Sgblack@eecs.umich.eduAddrRangeList 666330Sgblack@eecs.umich.eduPioPort::getAddrRanges() const 676330Sgblack@eecs.umich.edu{ 686330Sgblack@eecs.umich.edu return device->getAddrRanges(); 696330Sgblack@eecs.umich.edu} 706330Sgblack@eecs.umich.edu 716330Sgblack@eecs.umich.eduPioDevice::PioDevice(const Params *p) 726330Sgblack@eecs.umich.edu : MemObject(p), sys(p->system), pioPort(this) 736330Sgblack@eecs.umich.edu{} 746330Sgblack@eecs.umich.edu 756330Sgblack@eecs.umich.eduPioDevice::~PioDevice() 766330Sgblack@eecs.umich.edu{ 776330Sgblack@eecs.umich.edu} 786330Sgblack@eecs.umich.edu 796330Sgblack@eecs.umich.eduvoid 806330Sgblack@eecs.umich.eduPioDevice::init() 816330Sgblack@eecs.umich.edu{ 826330Sgblack@eecs.umich.edu if (!pioPort.isConnected()) 836330Sgblack@eecs.umich.edu panic("Pio port of %s not connected to anything!", name()); 846330Sgblack@eecs.umich.edu pioPort.sendRangeChange(); 856330Sgblack@eecs.umich.edu} 866330Sgblack@eecs.umich.edu 876330Sgblack@eecs.umich.eduBaseSlavePort & 886330Sgblack@eecs.umich.eduPioDevice::getSlavePort(const std::string &if_name, PortID idx) 896330Sgblack@eecs.umich.edu{ 906330Sgblack@eecs.umich.edu if (if_name == "pio") { 916330Sgblack@eecs.umich.edu return pioPort; 926330Sgblack@eecs.umich.edu } 936330Sgblack@eecs.umich.edu return MemObject::getSlavePort(if_name, idx); 946330Sgblack@eecs.umich.edu} 956330Sgblack@eecs.umich.edu 966330Sgblack@eecs.umich.eduunsigned int 976330Sgblack@eecs.umich.eduPioDevice::drain(DrainManager *dm) 986330Sgblack@eecs.umich.edu{ 996330Sgblack@eecs.umich.edu unsigned int count; 1006330Sgblack@eecs.umich.edu count = pioPort.drain(dm); 1016330Sgblack@eecs.umich.edu if (count) 1026330Sgblack@eecs.umich.edu setDrainState(Drainable::Draining); 1036330Sgblack@eecs.umich.edu else 1046330Sgblack@eecs.umich.edu setDrainState(Drainable::Drained); 1056330Sgblack@eecs.umich.edu return count; 1066330Sgblack@eecs.umich.edu} 1076330Sgblack@eecs.umich.edu 1086330Sgblack@eecs.umich.eduBasicPioDevice::BasicPioDevice(const Params *p, Addr size) 1096330Sgblack@eecs.umich.edu : PioDevice(p), pioAddr(p->pio_addr), pioSize(size), 1106330Sgblack@eecs.umich.edu pioDelay(p->pio_latency) 1116330Sgblack@eecs.umich.edu{} 1126330Sgblack@eecs.umich.edu 1136330Sgblack@eecs.umich.eduAddrRangeList 1146330Sgblack@eecs.umich.eduBasicPioDevice::getAddrRanges() const 1156330Sgblack@eecs.umich.edu{ 1166330Sgblack@eecs.umich.edu assert(pioSize != 0); 1176330Sgblack@eecs.umich.edu AddrRangeList ranges; 1186330Sgblack@eecs.umich.edu DPRINTF(AddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 1196330Sgblack@eecs.umich.edu ranges.push_back(RangeSize(pioAddr, pioSize)); 1206330Sgblack@eecs.umich.edu return ranges; 1216330Sgblack@eecs.umich.edu} 1226330Sgblack@eecs.umich.edu