io_device.cc revision 13892:0182a0601f66
1/* 2 * Copyright (c) 2012, 2015 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2006 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 * Nathan Binkert 42 */ 43 44#include "dev/io_device.hh" 45 46#include "base/trace.hh" 47#include "debug/AddrRanges.hh" 48#include "sim/system.hh" 49 50PioPort::PioPort(PioDevice *dev) 51 : SimpleTimingPort(dev->name() + ".pio", dev), device(dev) 52{ 53} 54 55Tick 56PioPort::recvAtomic(PacketPtr pkt) 57{ 58 // technically the packet only reaches us after the header delay, 59 // and typically we also need to deserialise any payload 60 Tick receive_delay = pkt->headerDelay + pkt->payloadDelay; 61 pkt->headerDelay = pkt->payloadDelay = 0; 62 63 const Tick delay(pkt->isRead() ? device->read(pkt) : device->write(pkt)); 64 assert(pkt->isResponse() || pkt->isError()); 65 return delay + receive_delay; 66} 67 68AddrRangeList 69PioPort::getAddrRanges() const 70{ 71 return device->getAddrRanges(); 72} 73 74PioDevice::PioDevice(const Params *p) 75 : ClockedObject(p), sys(p->system), pioPort(this) 76{} 77 78PioDevice::~PioDevice() 79{ 80} 81 82void 83PioDevice::init() 84{ 85 if (!pioPort.isConnected()) 86 panic("Pio port of %s not connected to anything!", name()); 87 pioPort.sendRangeChange(); 88} 89 90Port & 91PioDevice::getPort(const std::string &if_name, PortID idx) 92{ 93 if (if_name == "pio") { 94 return pioPort; 95 } 96 return ClockedObject::getPort(if_name, idx); 97} 98 99BasicPioDevice::BasicPioDevice(const Params *p, Addr size) 100 : PioDevice(p), pioAddr(p->pio_addr), pioSize(size), 101 pioDelay(p->pio_latency) 102{} 103 104AddrRangeList 105BasicPioDevice::getAddrRanges() const 106{ 107 assert(pioSize != 0); 108 AddrRangeList ranges; 109 DPRINTF(AddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 110 ranges.push_back(RangeSize(pioAddr, pioSize)); 111 return ranges; 112} 113