io_device.cc

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 * Authors: Ali Saidi
 *          Nathan Binkert
 */

#include "dev/io_device.hh"

#include "base/trace.hh"
#include "debug/AddrRanges.hh"
#include "sim/system.hh"

PioPort::PioPort(PioDevice *dev)
    : SimpleTimingPort(dev->name() + ".pio", dev), device(dev)
{
}

Tick
PioPort::recvAtomic(PacketPtr pkt)
{
    // technically the packet only reaches us after the header delay,
    // and typically we also need to deserialise any payload
    Tick receive_delay = pkt->headerDelay + pkt->payloadDelay;
    pkt->headerDelay = pkt->payloadDelay = 0;

    const Tick delay(pkt->isRead() ? device->read(pkt) : device->write(pkt));
    assert(pkt->isResponse() || pkt->isError());
    return delay + receive_delay;
}

AddrRangeList
PioPort::getAddrRanges() const
{
    return device->getAddrRanges();
}

PioDevice::PioDevice(const Params *p)
    : MemObject(p), sys(p->system), pioPort(this)
{}

PioDevice::~PioDevice()
{
}

void
PioDevice::init()
{
    if (!pioPort.isConnected())
        panic("Pio port of %s not connected to anything!", name());
    pioPort.sendRangeChange();
}

BaseSlavePort &
PioDevice::getSlavePort(const std::string &if_name, PortID idx)
{
    if (if_name == "pio") {
        return pioPort;
    }
    return MemObject::getSlavePort(if_name, idx);
}

BasicPioDevice::BasicPioDevice(const Params *p, Addr size)
    : PioDevice(p), pioAddr(p->pio_addr), pioSize(size),
      pioDelay(p->pio_latency)
{}

AddrRangeList
BasicPioDevice::getAddrRanges() const
{
    assert(pioSize != 0);
    AddrRangeList ranges;
    DPRINTF(AddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
    ranges.push_back(RangeSize(pioAddr, pioSize));
    return ranges;
}