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30 * Device module for modelling a fixed bandwidth full duplex ethernet link
38 #include "base/trace.hh"
39 #include "dev/etherdump.hh"
40 #include "dev/etherint.hh"
41 #include "dev/etherlink.hh"
42 #include "dev/etherpkt.hh"
43 #include "sim/builder.hh"
44 #include "sim/universe.hh"
48 EtherLink::EtherLink(const std::string
&name
, EtherInt
*i1
, EtherInt
*i2
,
49 Tick speed
, EtherDump
*dump
)
52 double rate
= ((double)ticksPerSecond
* 8.0) / (double)speed
;
54 link1
= new Link(name
+ ".link1", rate
, dump
);
55 link2
= new Link(name
+ ".link2", rate
, dump
);
57 int1
= new Interface(name
+ ".int1", link1
, link2
);
58 int2
= new Interface(name
+ ".int2", link2
, link1
);
66 EtherLink::~EtherLink()
75 EtherLink::Interface::Interface(const std::string
&name
, Link
*tx
, Link
*rx
)
76 : EtherInt(name
), txlink(tx
)
82 EtherLink::Link::Link(const std::string
&name
, double rate
, EtherDump
*d
)
83 : Serializeable(name
), txint(NULL
), rxint(NULL
), ticks_per_byte(rate
),
84 dump(d
), event(&mainEventQueue
, this)
88 EtherLink::Link::txDone()
90 rxint
->sendPacket(packet
);
95 DPRINTF(Ethernet
, "EtherLink packet received: len=%d\n", packet
->length
);
96 DDUMP(EthernetData
, packet
->data
, packet
->length
);
105 EtherLink::Link::transmit(PacketPtr pkt
)
108 DPRINTF(Ethernet
, "EtherLink packet not sent, link busy\n");
112 DPRINTF(Ethernet
, "EtherLink packet sent: len=%d\n", pkt
->length
);
113 DDUMP(EthernetData
, pkt
->data
, pkt
->length
);
116 int delay
= (int)ceil(((double)pkt
->length
* ticks_per_byte
) + 1.0);
117 DPRINTF(Ethernet
, "EtherLink scheduling packet: delay=%d, (rate=%f)\n",
118 delay
, ticks_per_byte
);
119 event
.schedule(curTick
+ delay
);
124 BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink
)
126 SimObjectParam
<EtherInt
*> interface1
;
127 SimObjectParam
<EtherInt
*> interface2
;
128 Param
<int> link_speed
;
129 SimObjectParam
<EtherDump
*> packet_dump
;
131 END_DECLARE_SIM_OBJECT_PARAMS(EtherLink
)
133 BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink
)
135 INIT_PARAM(interface1
, "interface 1"),
136 INIT_PARAM(interface2
, "interface 2"),
137 INIT_PARAM_DFLT(link_speed
, "link speed in bits per second", 100000000),
138 INIT_PARAM_DFLT(packet_dump
, "object to dump network packets to", NULL
)
140 END_INIT_SIM_OBJECT_PARAMS(EtherLink
)
142 CREATE_SIM_OBJECT(EtherLink
)
144 return new EtherLink(getInstanceName(), interface1
, interface2
, link_speed
,
148 REGISTER_SIM_OBJECT("EtherLink", EtherLink
)