gem5/dev/etherlink.cc
Nathan Binkert 3ece6ab029 New and improved configuration mechanism. No more writing of
wierd ini files.  The ini files are still used as an intermediate step,
but a sophisticated python library exists to help build them more
easily.

SConscript:
    add the new embedded file stuff
    remove all of the old object description junk
base/inifile.cc:
base/inifile.hh:
    get rid of findDefault and findAppend since they were the source
    of much evil.
base/trace.cc:
    For now, if we don't have the dprintf_stream set up, dump
    to standard out.  We probably want a command line option
    for this.
dev/alpha_console.cc:
    PioDevice now takes a platform parameter.
    All PioDevices must have a pio_latency parameter.  We stick
    a dummy parameter in here for now until we get rid of the
    builder stuff.
dev/alpha_console.hh:
    don't need Platform anymore
dev/baddev.cc:
    PioDevice now takes a platform parameter.
    All PioDevices must have a pio_latency parameter.  We stick
    a dummy parameter in here for now until we get rid of the
    builder stuff. Same for the platform parameter, though we just
    pass the PioDevice a null parameter since it isn't used by
    this device and it's quicker.
dev/baddev.hh:
    fix #include guards
dev/etherlink.cc:
    rename parameters.
dev/ethertap.cc:
    rename parameters
dev/ide_ctrl.cc:
    All devices need an address even if it will get overwritten later.
dev/ide_disk.cc:
    use an enum for the drive ID stuff.
    rename disk_delay -> delay
    Actually, I think that we should implement "cable select" and
    have the controller tell the drive what it is.
dev/io_device.cc:
dev/io_device.hh:
    All IO devices take a Platform *
dev/ns_gige.cc:
    all devices need an io_bus.  rename header_bus to io_bus
    We don't need stuff for the interrupt controller since
    it's all in the platform now.
dev/ns_gige.hh:
    We don't need stuff for the interrupt controller now since
    it's all in the platform.
dev/pciconfigall.cc:
    Pass a dummy NULL to the PioDevice for the platform since
    we don't need one.
dev/pcidev.cc:
    Move a bunch of common functionality into the PciDev
dev/platform.hh:
    remove unneeded code
dev/tsunami.cc:
    remove unused param
dev/tsunami_cchip.cc:
    pass platform pointer
dev/tsunami_io.cc:
dev/tsunami_pchip.cc:
dev/uart.cc:
    pass platform variable
dev/uart.hh:
    don't need to keep a platform pointer.  it's in the base class
kern/linux/linux_system.cc:
kern/tru64/tru64_system.cc:
    rename some parameters
sim/builder.cc:
    clean up builder code. use more parameters from the
    config node.  all sections with a type= are now created,
    the old mechanisms no longer work
sim/builder.hh:
    remove some extra variables since they are found in the ConfigNode
sim/main.cc:
    add a quick hack command line argument -X to dump out the
    embedded files.  (probably should be fixed up a little.)
    accept .mpy files
    printing to the streams has to happen after the hierarchy
    is built since we're moving away from param contexts
sim/param.cc:
    add parsing support for ranges
sim/process.cc:
    isValid isn't very useful anymore.  interpret the names
    stdout, stderr, cout, cerr for the file descriptors
sim/pyconfig/SConscript:
    Add Action handlers for creating an embedded python file
    and for creating an embedded C file.

    use these action handlers to embed all objects found in the objects
    tree into the binary along with the importer and the m5config stuff
sim/pyconfig/m5config.py:
    Major changes to the original configuration file generator.  These
    changes largely involve implementing copy-on-write like semantics
    for all of the SimObjects.  Real documentation must be written.
sim/universe.cc:
    Universe becomes a SimObject since we don't really have the notion of
    param contexts in the python code.

--HG--
rename : sim/pyconfig/m5configbase.py => sim/pyconfig/m5config.py
extra : convert_revision : c353453e5beb91c37f15755998fc0d8858c6829a
2005-01-15 04:12:25 -05:00

287 lines
7.5 KiB
C++

/*
* Copyright (c) 2002-2004 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* @file
* Device module for modelling a fixed bandwidth full duplex ethernet link
*/
#include <cmath>
#include <deque>
#include <string>
#include <vector>
#include "base/trace.hh"
#include "dev/etherdump.hh"
#include "dev/etherint.hh"
#include "dev/etherlink.hh"
#include "dev/etherpkt.hh"
#include "sim/builder.hh"
#include "sim/serialize.hh"
#include "sim/system.hh"
#include "sim/universe.hh"
using namespace std;
EtherLink::EtherLink(const string &name, EtherInt *i1, EtherInt *i2,
Tick speed, Tick dly, EtherDump *dump)
: SimObject(name)
{
double rate = ((double)ticksPerSecond * 8.0) / (double)speed;
Tick delay = US2Ticks(dly);
link1 = new Link(name + ".link1", rate, delay, dump);
link2 = new Link(name + ".link2", rate, delay, dump);
int1 = new Interface(name + ".int1", link1, link2);
int2 = new Interface(name + ".int2", link2, link1);
int1->setPeer(i1);
i1->setPeer(int1);
int2->setPeer(i2);
i2->setPeer(int2);
}
EtherLink::~EtherLink()
{
delete link1;
delete link2;
delete int1;
delete int2;
}
EtherLink::Interface::Interface(const string &name, Link *tx, Link *rx)
: EtherInt(name), txlink(tx)
{
tx->setTxInt(this);
rx->setRxInt(this);
}
EtherLink::Link::Link(const string &name, double rate, Tick delay,
EtherDump *d)
: objName(name), txint(NULL), rxint(NULL), ticksPerByte(rate),
linkDelay(delay), dump(d), doneEvent(this)
{}
void
EtherLink::serialize(ostream &os)
{
nameOut(os, name() + ".link1");
link1->serialize(os);
nameOut(os, name() + ".link2");
link2->serialize(os);
}
void
EtherLink::unserialize(Checkpoint *cp, const string &section)
{
link1->unserialize(cp, section + ".link1");
link2->unserialize(cp, section + ".link2");
}
void
EtherLink::Link::txComplete(PacketPtr packet)
{
DPRINTF(Ethernet, "packet received: len=%d\n", packet->length);
DDUMP(EthernetData, packet->data, packet->length);
rxint->sendPacket(packet);
}
class LinkDelayEvent : public Event
{
protected:
EtherLink::Link *link;
PacketPtr packet;
// non-scheduling version for createForUnserialize()
LinkDelayEvent(EtherLink::Link *link);
public:
LinkDelayEvent(EtherLink::Link *link, PacketPtr pkt, Tick when);
void process();
virtual void serialize(ostream &os);
virtual void unserialize(Checkpoint *cp, const string &section);
static Serializable *createForUnserialize(Checkpoint *cp,
const string &section);
};
void
EtherLink::Link::txDone()
{
if (dump)
dump->dump(packet);
if (linkDelay > 0) {
DPRINTF(Ethernet, "packet delayed: delay=%d\n", linkDelay);
new LinkDelayEvent(this, packet, curTick + linkDelay);
} else {
txComplete(packet);
}
packet = 0;
assert(!busy());
txint->sendDone();
}
bool
EtherLink::Link::transmit(PacketPtr pkt)
{
if (busy()) {
DPRINTF(Ethernet, "packet not sent, link busy\n");
return false;
}
DPRINTF(Ethernet, "packet sent: len=%d\n", pkt->length);
DDUMP(EthernetData, pkt->data, pkt->length);
packet = pkt;
Tick delay = (Tick)ceil(((double)pkt->length * ticksPerByte) + 1.0);
DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
delay, ticksPerByte);
doneEvent.schedule(curTick + delay);
return true;
}
void
EtherLink::Link::serialize(ostream &os)
{
bool packet_exists = packet;
SERIALIZE_SCALAR(packet_exists);
bool event_scheduled = doneEvent.scheduled();
SERIALIZE_SCALAR(event_scheduled);
if (event_scheduled) {
Tick event_time = doneEvent.when();
SERIALIZE_SCALAR(event_time);
}
if (packet_exists)
packet->serialize("packet", os);
}
void
EtherLink::Link::unserialize(Checkpoint *cp, const string &section)
{
bool packet_exists;
UNSERIALIZE_SCALAR(packet_exists);
if (packet_exists) {
packet = new PacketData(16384);
packet->unserialize("packet", cp, section);
}
bool event_scheduled;
UNSERIALIZE_SCALAR(event_scheduled);
if (event_scheduled) {
Tick event_time;
UNSERIALIZE_SCALAR(event_time);
doneEvent.schedule(event_time);
}
}
LinkDelayEvent::LinkDelayEvent(EtherLink::Link *l)
: Event(&mainEventQueue), link(l)
{
setFlags(AutoSerialize);
setFlags(AutoDelete);
}
LinkDelayEvent::LinkDelayEvent(EtherLink::Link *l, PacketPtr p, Tick when)
: Event(&mainEventQueue), link(l), packet(p)
{
setFlags(AutoSerialize);
setFlags(AutoDelete);
schedule(when);
}
void
LinkDelayEvent::process()
{
link->txComplete(packet);
}
void
LinkDelayEvent::serialize(ostream &os)
{
paramOut(os, "type", string("LinkDelayEvent"));
Event::serialize(os);
SERIALIZE_OBJPTR(link);
packet->serialize("packet", os);
}
void
LinkDelayEvent::unserialize(Checkpoint *cp, const string &section)
{
Event::unserialize(cp, section);
packet = new PacketData(16384);
packet->unserialize("packet", cp, section);
}
Serializable *
LinkDelayEvent::createForUnserialize(Checkpoint *cp, const string &section)
{
EtherLink::Link *link;
UNSERIALIZE_OBJPTR(link);
return new LinkDelayEvent(link);
}
REGISTER_SERIALIZEABLE("LinkDelayEvent", LinkDelayEvent)
BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
SimObjectParam<EtherInt *> int1;
SimObjectParam<EtherInt *> int2;
Param<Tick> speed;
Param<Tick> delay;
SimObjectParam<EtherDump *> dump;
END_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink)
INIT_PARAM(int1, "interface 1"),
INIT_PARAM(int2, "interface 2"),
INIT_PARAM_DFLT(speed, "link speed in bits per second", 100000000),
INIT_PARAM_DFLT(delay, "transmit delay of packets in us", 0),
INIT_PARAM_DFLT(dump, "object to dump network packets to", NULL)
END_INIT_SIM_OBJECT_PARAMS(EtherLink)
CREATE_SIM_OBJECT(EtherLink)
{
return new EtherLink(getInstanceName(), int1, int2, speed, delay, dump);
}
REGISTER_SIM_OBJECT("EtherLink", EtherLink)